/* ============================================
   KevinTen Personal Website - Main Styles
   Modern Professional Design
   ============================================ */

/* ============================================
   Accessibility - Skip to Content
   ============================================ */

.skip-to-content {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: white;
  font-weight: var(--font-medium);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: var(--space-4);
  outline: 3px solid white;
  outline-offset: 2px;
}

/* ============================================
   Navigation - Fixed Top Bar Design
   ============================================ */

.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-subtle);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.nav-header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .nav-header {
  background: rgba(250, 250, 250, 0.8);
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .nav-header.scrolled {
  background: rgba(250, 250, 250, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-base);
}

.nav-logo:hover {
  transform: translateY(-1px);
}

.nav-logo img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 2px solid var(--color-primary-alpha-30);
  transition: all var(--transition-base);
}

.nav-logo:hover img {
  border-color: rgba(59, 130, 246, 0.6);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  padding: var(--space-2) var(--space-3);
  border-radius: 8px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent-indigo);
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  cursor: pointer;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
  left: 0;
}

@media (min-width: 768px) and (max-width: 1200px) {
  .nav-links {
    gap: 0;
  }

  .nav-link {
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
  }
}

/* Language Toggle Button */
.lang-toggle-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--color-card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 12px;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  font-family: inherit;
  letter-spacing: 0.02em;
}

.lang-toggle-btn:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.lang-toggle-btn svg {
  opacity: 0.7;
}

.lang-toggle-btn:hover svg {
  opacity: 1;
}

@media (max-width: 768px) {
  .lang-toggle-btn {
    padding: 5px 10px;
    font-size: 11px;
  }
  .lang-toggle-btn svg {
    width: 14px;
    height: 14px;
  }
}

/* Theme Toggle Button - Modern Design */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 12px;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.theme-toggle-btn:hover {
  background: rgba(37, 99, 235, 0.15);
  border-color: rgba(37, 99, 235, 0.4);
  color: var(--color-text);
  box-shadow: var(--bento-shadow-md);
}

.theme-toggle-btn:hover::before {
  opacity: 0.1;
}

.theme-toggle-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.theme-toggle-btn .theme-icon {
  position: absolute;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn .moon-icon {
  opacity: 0;
  transform: rotate(-180deg) scale(0.5);
}

/* Dark theme: show sun icon */
[data-theme="dark"] .theme-toggle-btn .sun-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

/* Light theme: show moon icon */
[data-theme="light"] .theme-toggle-btn .moon-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-toggle-btn .sun-icon {
  opacity: 0;
  transform: rotate(180deg) scale(0.5);
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-actions .btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  border-radius: 10px;
}

/* Theme transition */
html {
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

body,
.section,
.project-card,
.writing-card,
.modal-content,
.contact-item {
  transition: background-color var(--transition-slow),
               border-color var(--transition-slow),
               color var(--transition-slow),
               box-shadow var(--transition-slow);
}

/* ============================================
   Professional Card Styles - Modern Design
   ============================================ */

/* Professional Card - Modern Style */
.card-cyber {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.card-cyber:hover {
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--bento-shadow-hover);
}

/* Professional Text Highlight */
.neon-text {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.neon-text-purple {
  color: var(--color-secondary);
  font-weight: var(--font-semibold);
}

.neon-text-pink {
  color: var(--color-accent);
  font-weight: var(--font-semibold);
}

/* Professional Border */
.tech-border {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  position: relative;
  transition: border-color 0.3s ease;
}

.tech-border:hover {
  border-color: var(--color-border-glow);
}

.tech-border::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-cyber);
  border-radius: 22px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
  background-size: 200% 200%;
}

.tech-border:hover::after {
  opacity: 0.6;
}

/* Base body styles */
body {
  overflow-x: hidden;
}

/* Hero Section - Modern Glassmorphism Design
   ============================================ */

/* Hero Header - Title Section (main definition at line ~3170) */

/* Profile Card Styles */
.profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

/* Hero Scroll — hidden, hero content is rich enough */
.hero-scroll {
  display: none;
}

/* ============================================
   Original Hero Section - Modern Glassmorphism Design (Legacy)
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-height) + var(--space-8)) var(--space-6) var(--space-12);
  background: var(--color-bg);
  overflow: hidden;
}

/* Subtle Grid Background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* Ambient Glow — Indigo (top-left corner, complements illustration) */
.hero::after {
  content: '';
  position: absolute;
  top: 5%;
  left: 5%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-indigo-alpha-10) 0%, transparent 70%);
  filter: blur(60px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* Ambient Glow — Cyan (bottom-right corner) */
.hero-glow-cyan {
  position: absolute;
  bottom: 5%;
  right: 5%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-cyan-alpha-8) 0%, transparent 70%);
  filter: blur(50px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* Hero Illustration Background */
.hero-illustration {
  position: absolute;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  width: min(1400px, 100%);
  height: 70%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: url('../../images/hero/hero-bg-dark.webp') center / cover no-repeat;
  opacity: 0.20;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, transparent 20%, rgba(0,0,0,0.4) 60%, rgba(0,0,0,0.8) 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, transparent 20%, rgba(0,0,0,0.4) 60%, rgba(0,0,0,0.8) 100%);
  transition: opacity 0.6s ease;
  animation: heroIllustrationFadeIn 1.5s ease-out both;
  will-change: opacity;
}

@keyframes heroIllustrationFadeIn {
  from { opacity: 0; transform: translateX(-50%) scale(1.03); }
  to { opacity: 0.20; transform: translateX(-50%) scale(1); }
}

[data-theme="light"] .hero-illustration {
  background-image: url('../../images/hero/hero-bg-light.webp');
  opacity: 0.10;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, transparent 25%, rgba(0,0,0,0.3) 65%, rgba(0,0,0,0.6) 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, transparent 25%, rgba(0,0,0,0.3) 65%, rgba(0,0,0,0.6) 100%);
  animation-name: heroIllustrationFadeInLight;
}

@keyframes heroIllustrationFadeInLight {
  from { opacity: 0; transform: translateX(-50%) scale(1.03); }
  to { opacity: 0.10; transform: translateX(-50%) scale(1); }
}

/* Reduced motion: skip animation for accessibility */
@media (prefers-reduced-motion: reduce) {
  .hero-illustration {
    animation: none;
    opacity: 0.15;
  }
  [data-theme="light"] .hero-illustration {
    opacity: 0.08;
  }
}

@media (max-width: 768px) {
  .hero-illustration { height: 50%; }
  .hero-illustration { animation-name: heroIllustrationFadeInMobile; }
  @keyframes heroIllustrationFadeInMobile {
    from { opacity: 0; transform: translateX(-50%) scale(1.03); }
    to { opacity: 0.14; transform: translateX(-50%) scale(1); }
  }
  [data-theme="light"] .hero-illustration { animation-name: heroIllustrationFadeInLightMobile; }
  @keyframes heroIllustrationFadeInLightMobile {
    from { opacity: 0; transform: translateX(-50%) scale(1.03); }
    to { opacity: 0.07; transform: translateX(-50%) scale(1); }
  }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: var(--leading-tight);
  color: #FAFAFA;
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
  animation: fadeInUp var(--transition-slower) ease-out;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  animation: fadeInUp var(--transition-slow) ease-out 0.2s both;
  line-height: var(--leading-relaxed);
}

.hero-realname {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  margin-bottom: var(--space-5);
  animation: fadeInUp var(--transition-slow) ease-out 0.25s both;
  opacity: 0.8;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 650px;
  margin: 0 auto var(--space-10);
  animation: fadeInUp var(--transition-slow) ease-out 0.3s both;
  line-height: 1.8;
  letter-spacing: 0.01em;
}

.hero-description strong {
  color: var(--color-text);
  font-weight: var(--font-semibold);
}

/* Account Matrix - Bento Card 内的账号矩阵 */
.account-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.account-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-normal) ease;
  position: relative;
  cursor: pointer;
}

.account-card:hover {
  background: var(--color-primary-alpha);
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: translateY(-2px);
}

.account-card:active {
  transform: translateY(0);
}

.account-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.account-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

/* 微信公众号 tooltip */
.account-card-wechat {
  position: relative;
}

.account-tooltip {
  position: absolute;
  bottom: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal) ease;
  z-index: 10;
  pointer-events: none;
}

.account-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--glass-bg);
}

.account-card-wechat:hover .account-tooltip,
.account-card-wechat:focus .account-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) scale(1);
}

.tooltip-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  min-width: 120px;
  text-align: center;
}

.tooltip-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.tooltip-qr {
  display: flex;
  justify-content: center;
  padding: var(--space-2);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

.tooltip-qr svg {
  color: var(--color-text-muted);
}

/* 响应式 */
@media (max-width: 640px) {
  .account-matrix {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2);
  }

  .account-card {
    padding: var(--space-3);
  }

  .account-icon {
    width: 20px;
    height: 20px;
  }

  .account-label {
    font-size: var(--text-xs);
  }
}

/* Hero Meta - Modern Badge Design */
.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  animation: fadeInUp var(--transition-slow) ease-out 0.25s both;
  flex-wrap: wrap;
}

.hero-location,
.hero-company,
.hero-availability {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: 20px;
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
}

.hero-location {
  color: var(--color-text-secondary);
  background: rgba(100, 116, 139, 0.1);
  border: 1px solid rgba(100, 116, 139, 0.2);
}

.hero-location:hover {
  background: rgba(100, 116, 139, 0.15);
}

.hero-company {
  color: var(--color-accent);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.hero-company:hover {
  background: rgba(6, 182, 212, 0.15);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.2);
}

.hero-availability.available {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.hero-availability.busy {
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.availability-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}

.desktop-only {
  display: inline;
}

@media (max-width: 768px) {
  .desktop-only {
    display: none;
  }
}

/* Hero Skills Tags - Modern Floating Design */
.hero-skills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  animation: fadeInUp var(--transition-slow) ease-out 0.35s both;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(10px);
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.skill-tag:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* Skill Tag Color Variants - More Subtle */
.skill-tag.java {
  background: linear-gradient(135deg, rgba(176, 114, 25, 0.15), rgba(176, 114, 25, 0.08));
  border-color: rgba(176, 114, 25, 0.3);
  color: #FBBF24;
}

.skill-tag.python {
  background: linear-gradient(135deg, rgba(55, 118, 171, 0.15), rgba(55, 118, 171, 0.08));
  border-color: rgba(55, 118, 171, 0.3);
  color: #60A5FA;
}

.skill-tag.go {
  background: linear-gradient(135deg, rgba(0, 173, 216, 0.15), rgba(0, 173, 216, 0.08));
  border-color: rgba(0, 173, 216, 0.3);
  color: #22D3EE;
}

.skill-tag.ai {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(139, 92, 246, 0.08));
  border-color: rgba(139, 92, 246, 0.3);
  color: #A78BFA;
}

.skill-tag.cloud {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(6, 182, 212, 0.08));
  border-color: rgba(6, 182, 212, 0.3);
  color: #22D3EE;
}

.skill-tag.dubbo {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.15), rgba(249, 115, 22, 0.08));
  border-color: rgba(249, 115, 22, 0.3);
  color: #FB923C;
}

.skill-tag.dapr {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.15), rgba(34, 197, 94, 0.08));
  border-color: rgba(34, 197, 94, 0.3);
  color: #4ADE80;
}

.skill-tag.reactive {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.15), rgba(236, 72, 153, 0.08));
  border-color: rgba(236, 72, 153, 0.3);
  color: #F472B6;
}

/* ============================================
   Buttons - Modern Pill Design
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-7);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: var(--leading-none);
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 200ms ease;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-indigo);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-accent-indigo);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-indigo-light);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-ghost:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-base);
  border-radius: 12px;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  border-radius: 8px;
}

.btn-secondary:active {
  transform: scale(0.98);
}

/* Loading state for buttons */
.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid var(--color-text);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Button focus enhancement */
.btn:focus-visible {
  outline-offset: 4px;
}

/* ============================================
   Section Styles - Modern Design
   ============================================ */

.section {
  padding: 3rem var(--space-6);
  position: relative;
}

.section-spacious {
  padding: 3.5rem var(--space-6);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 1.8rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #FAFAFA;
  margin-bottom: var(--space-4);
  position: relative;
}

.section-description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  letter-spacing: 0.01em;
}

/* Section Index Number — editorial numbering */
.section-idx {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-3);
  opacity: 0.6;
}

.section-idx::before {
  content: '—— ';
  color: var(--color-border);
}

.section-idx::after {
  content: ' ——';
  color: var(--color-border);
}

/* Alternating section background tint */
.section-alt {
  background: rgba(255, 255, 255, 0.012);
}

.section-alt::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(37, 99, 235, 0.015) 50%,
    transparent 100%
  );
  pointer-events: none;
}

/* ============================================
   Section Bridge — transition connectors
   ============================================ */
.section-bridge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 0;
  position: relative;
  height: 36px;
  justify-content: center;
}

.bridge-line {
  width: 1px;
  flex: 1;
  background: linear-gradient(
    180deg,
    transparent 0%,
    var(--color-border) 40%,
    var(--color-border) 60%,
    transparent 100%
  );
  opacity: 0.4;
}

.bridge-accent {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-subtle);
  padding: 6px 0;
  flex-shrink: 0;
  opacity: 0.5;
}

/* Variant: three dots */
.bridge-accent--dots {
  gap: 6px;
}

.bridge-accent--dots span {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
}

.bridge-accent--dots span:nth-child(2) {
  opacity: 0.7;
}

/* Variant: diamond SVG */
.bridge-accent--diamond svg {
  display: block;
}

/* Variant: chevron SVG */
.bridge-accent--chevron svg {
  display: block;
}

/* Variant: cross SVG */
.bridge-accent--cross svg {
  display: block;
}

/* Reduce gap: sections after a bridge get reduced top padding */
.section-bridge + .section {
  padding-top: 1.2rem;
}

.section-bridge + .section-spacious {
  padding-top: 1.5rem;
}

/* Section before bridge: reduce bottom padding */
.section-spacious {
  padding-bottom: 2.5rem;
}

/* Light theme adjustments */
[data-theme="light"] .section-alt {
  background: rgba(0, 0, 0, 0.015);
}

[data-theme="light"] .section-alt::before {
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(37, 99, 235, 0.02) 50%,
    transparent 100%
  );
}

[data-theme="light"] .section-idx {
  color: var(--color-text-muted);
}

[data-theme="light"] .bridge-accent {
  color: var(--color-border-light);
}

[data-theme="light"] .section-title {
  color: #18181B;
}

[data-theme="light"] .hero-title {
  color: #18181B;
}

/* Light theme hero adjustments */
[data-theme="light"] .hero::before {
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
}

[data-theme="light"] .hero::after {
  background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
}

[data-theme="light"] .hero-glow-cyan {
  background: radial-gradient(circle, rgba(6, 182, 212, 0.04) 0%, transparent 70%);
}

/* ============================================
   About Me Section - Modern Glassmorphism Cards
   ============================================ */

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}

.about-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-8);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
}

.about-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.about-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 16px;
  color: white;
  margin-bottom: var(--space-5);
  box-shadow: 0 8px 20px var(--color-primary-alpha-30);
  position: relative;
  z-index: 1;
}

.about-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
}

.about-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* Impact Cards - Modern Badges */
.about-impact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
  position: relative;
  z-index: 1;
}

.impact-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  background: var(--color-primary-alpha-15);
  color: #60A5FA;
  border: 1px solid var(--color-primary-alpha-30);
  box-shadow: 0 2px 8px var(--color-primary-alpha-10);
}

.interests-section {
  text-align: center;
  padding: var(--space-10);
  background: rgba(30, 41, 59, 0.4);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: var(--space-8);
}

.interests-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.interests-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.interest-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  background: var(--color-primary-alpha-10);
  backdrop-filter: blur(10px);
  color: var(--color-text);
  border: 1px solid var(--color-primary-alpha-20);
  transition: all var(--transition-base);
}

.interest-tag:hover {
  transform: translateY(-3px);
  background: var(--color-primary-alpha-15);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 8px 20px var(--color-primary-alpha-20);
}

/* ============================================
   Work Experience Timeline - Modern Design
   ============================================ */

.experience-timeline {
  max-width: var(--container-xl);
  margin: 0 auto;
}

.experience-chapter-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-12) 0;
  padding-left: 210px;
}

.chapter-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-secondary), transparent);
  opacity: 0.5;
}

.chapter-label {
  white-space: nowrap;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  letter-spacing: 0.05em;
  padding: 6px 20px;
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 20px;
  background: rgba(99, 102, 241, 0.08);
}

@media (max-width: 768px) {
  .experience-chapter-divider {
    padding-left: 0;
    margin: var(--space-8) 0;
  }
}

.experience-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
  position: relative;
}

.experience-card::before {
  content: '';
  position: absolute;
  left: 175px;
  top: 45px;
  bottom: -45px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary) 0%, rgba(59, 130, 246, 0.2) 100%);
  opacity: 0.3;
}

.experience-card:last-child::before {
  display: none;
}

.experience-period {
  position: relative;
  padding-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-accent);
  text-align: right;
}

.experience-period::before {
  content: '';
  position: absolute;
  right: -32px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow:
    0 0 0 3px rgba(6, 182, 212, 0.3),
    0 0 12px rgba(6, 182, 212, 0.4);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 300ms ease;
}

.experience-card:hover .experience-period::before {
  transform: scale(1.3);
  box-shadow:
    0 0 0 4px rgba(6, 182, 212, 0.4),
    0 0 20px rgba(6, 182, 212, 0.6);
}

/* Timeline node pulse animation */
@keyframes timelinePulse {
  0% {
    box-shadow:
      0 0 0 3px rgba(6, 182, 212, 0.3),
      0 0 0 0 rgba(6, 182, 212, 0.6);
  }
  70% {
    box-shadow:
      0 0 0 3px rgba(6, 182, 212, 0.3),
      0 0 0 10px rgba(6, 182, 212, 0);
  }
  100% {
    box-shadow:
      0 0 0 3px rgba(6, 182, 212, 0.3),
      0 0 0 0 rgba(6, 182, 212, 0);
  }
}

.experience-period::after {
  content: '';
  position: absolute;
  right: -32px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  animation: timelinePulse 2s infinite;
  pointer-events: none;
}

.experience-card.featured .experience-period::before {
  background: var(--color-secondary);
  box-shadow:
    0 0 0 3px rgba(139, 92, 246, 0.3),
    0 0 12px rgba(139, 92, 246, 0.4);
}

.experience-card.featured:hover .experience-period::before {
  box-shadow:
    0 0 0 4px rgba(139, 92, 246, 0.4),
    0 0 20px rgba(139, 92, 246, 0.6);
}

@keyframes timelinePulseFeatured {
  0% {
    box-shadow:
      0 0 0 3px rgba(139, 92, 246, 0.3),
      0 0 0 0 rgba(139, 92, 246, 0.6);
  }
  70% {
    box-shadow:
      0 0 0 3px rgba(139, 92, 246, 0.3),
      0 0 0 10px rgba(139, 92, 246, 0);
  }
  100% {
    box-shadow:
      0 0 0 3px rgba(139, 92, 246, 0.3),
      0 0 0 0 rgba(139, 92, 246, 0);
  }
}

.experience-card.featured .experience-period::after {
  animation: timelinePulseFeatured 2s infinite;
}

.experience-content {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-8);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

/* Experience Header - Modern Design */
.experience-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.experience-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 16px;
  background: var(--color-card-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.meta-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.meta-tag.role {
  background: var(--color-primary-alpha-15);
  border-color: var(--color-primary-alpha-30);
  color: #60A5FA;
}

.meta-tag.team {
  background: rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.3);
  color: #22D3EE;
}

.meta-tag.impact {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34D399;
}

.experience-content {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-8);
  box-shadow: var(--card-shadow);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), border-color 200ms ease, box-shadow 300ms ease;
  position: relative;
  overflow: hidden;
}

/* Top gradient border on hover */
.experience-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-secondary), transparent);
  opacity: 0;
  transition: opacity 300ms ease;
}

.experience-content:hover::before {
  opacity: 1;
}

.experience-content:hover {
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover), 0 0 30px rgba(99, 102, 241, 0.1);
  transform: translateY(-4px) scale(1.01);
}

.experience-card.featured .experience-content {
  border-color: rgba(139, 92, 246, 0.2);
}

.experience-card.featured .experience-content::before {
  background: linear-gradient(90deg, transparent, var(--color-secondary), var(--color-primary), transparent);
}

.experience-card.featured .experience-content:hover {
  box-shadow: var(--card-shadow-hover), 0 0 40px rgba(139, 92, 246, 0.15);
}

.experience-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.experience-company {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.experience-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

/* Experience Highlights — Bento Feature Cards */
.experience-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.highlight-item {
  --accent: #3B82F6;
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  background: var(--color-bg-secondary);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  opacity: 1;
  transform: translateY(0);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1),
              border-color 200ms ease,
              box-shadow 300ms ease,
              opacity 300ms ease;
}

/* Top accent gradient line */
.highlight-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 20%, transparent));
  opacity: 0.7;
}

/* Gradient orb — CSS concept illustration */
.highlight-item::after {
  content: '';
  position: absolute;
  bottom: -25%;
  right: -15%;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 12%, transparent) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.highlight-item:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--accent) 10%, transparent);
}

.highlight-item:hover::after {
  transform: scale(1.3);
  opacity: 1;
}

/* Stagger animation */
.experience-card.is-visible .highlight-item:nth-child(1) { transition-delay: 100ms; }
.experience-card.is-visible .highlight-item:nth-child(2) { transition-delay: 200ms; }
.experience-card.is-visible .highlight-item:nth-child(3) { transition-delay: 300ms; }

/* Icon wrap — accent-tinted rounded square */
.highlight-icon-wrap {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  border-radius: 12px;
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), background 200ms ease;
}

.highlight-item:hover .highlight-icon-wrap {
  transform: scale(1.1) rotate(-5deg);
  background: color-mix(in srgb, var(--accent) 22%, transparent);
}

.highlight-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* Title + text */
.highlight-title {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  position: relative;
  z-index: 1;
}

.highlight-text {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  position: relative;
  z-index: 1;
  margin: 0;
}

.experience-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Light theme: highlight cards use lighter bg */
[data-theme="light"] .highlight-item {
  background: #F8FAFC;
  border-color: color-mix(in srgb, var(--accent) 25%, transparent);
}

[data-theme="light"] .highlight-title {
  color: #1E293B;
}

[data-theme="light"] .highlight-text {
  color: #64748B;
}

.tech-badge {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 16px;
  background: var(--color-card-bg);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
  transition: all 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
}

.tech-badge:hover {
  transform: translateY(-3px) scale(1.05);
  border-color: var(--color-primary-alpha-30);
  color: var(--color-text-secondary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tech-badge:active {
  transform: translateY(-1px) scale(1.02);
  transition-duration: 100ms;
}

.tech-badge.primary {
  background: var(--color-primary-alpha-15);
  color: #60A5FA;
  border-color: var(--color-primary-alpha-30);
}

.tech-badge.primary:hover {
  transform: translateY(-2px);
  background: rgba(59, 130, 246, 0.25);
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 4px 12px var(--color-primary-alpha-20);
}

@media (max-width: 1024px) {
  .experience-highlights {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
  }

  .highlight-item {
    padding: var(--space-4);
  }
}

@media (max-width: 768px) {
  .experience-card {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .experience-card::before {
    display: none;
  }

  .experience-period {
    text-align: left;
    padding-left: var(--space-4);
  }

  .experience-period::before {
    right: auto;
    left: 0;
  }

  .experience-highlights {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .highlight-item {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
  }

  .highlight-icon-wrap {
    margin-bottom: 0;
  }

  .highlight-item-content {
    flex: 1;
    min-width: 0;
  }
}

/* ============================================
   AI Agent Ecosystem — Categorized Compact Grid
   ============================================ */

.agent-ecosystem {
  margin-top: var(--space-12);
  padding-top: var(--space-10);
  border-top: 1px solid var(--color-border-subtle);
}

.ecosystem-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.ecosystem-title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.ecosystem-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.eco-open-all-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-4);
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent, #8B5CF6));
  color: #fff;
  border: none;
  border-radius: 20px;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.eco-open-all-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.45);
}

.eco-open-all-btn:active {
  transform: translateY(0);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.eco-category {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.eco-category-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border-subtle);
}

.eco-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.eco-item {
  --accent: #3B82F6;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-secondary);
  border: 1px solid color-mix(in srgb, var(--accent) 12%, transparent);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease, background 200ms ease;
  position: relative;
  overflow: hidden;
}

.eco-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 200ms ease;
}

.eco-item:hover {
  transform: translateX(4px);
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--accent) 8%, transparent);
  background: color-mix(in srgb, var(--accent) 5%, var(--color-bg-secondary));
}

.eco-item:hover::before {
  opacity: 1;
}

.eco-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  white-space: nowrap;
  min-width: 100px;
}

.eco-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.eco-badge {
  font-size: 0.65rem;
  padding: 2px 8px;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
  border-radius: var(--radius-full);
  white-space: nowrap;
  font-weight: var(--font-semibold);
}

.eco-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.65rem;
  color: var(--color-text-subtle);
  white-space: nowrap;
  opacity: 0.6;
  transition: opacity 200ms ease, color 200ms ease;
}

.eco-link svg {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
}

.eco-item:hover .eco-link {
  opacity: 1;
  color: var(--accent);
}

/* Light theme */
[data-theme="light"] .eco-item {
  background: #F8FAFC;
  border-color: color-mix(in srgb, var(--accent) 18%, transparent);
}

[data-theme="light"] .agent-ecosystem {
  border-top-color: rgba(0, 0, 0, 0.08);
}

/* Responsive */
@media (max-width: 1024px) {
  .ecosystem-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .ecosystem-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .eco-name {
    min-width: 80px;
  }
}

/* ============================================
   Projects Grid - Modern Glassmorphism Design
   ============================================ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
  max-width: var(--container-xl);
  margin: 0 auto;
}

.project-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-7);
  box-shadow: var(--card-shadow);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), border-color 200ms ease, box-shadow 300ms ease;
  position: relative;
  overflow: hidden;
}

/* Shimmer loading effect */
.shimmer {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.05) 50%,
    transparent 100%
  );
  transform: translateX(-100%);
  transition: transform 0.6s ease;
  pointer-events: none;
}

.project-card:hover .shimmer {
  transform: translateX(100%);
}

/* Top gradient border */
.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-secondary), transparent);
  opacity: 0;
  transition: opacity 300ms ease;
}

.project-card:hover::before {
  opacity: 1;
}

.project-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover), 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-card.featured {
  border-color: var(--color-accent-indigo-alpha-20);
}

.project-card.featured::before {
  background: linear-gradient(90deg, transparent, var(--color-secondary), var(--color-primary), transparent);
}

.project-card.featured:hover {
  box-shadow: var(--card-shadow-hover), 0 20px 40px rgba(139, 92, 246, 0.15);
}

.project-card:focus-within {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--card-shadow-hover);
}

.project-cover {
  width: calc(100% + var(--space-5) * 2);
  height: 140px;
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  margin: calc(-1 * var(--space-5)) calc(-1 * var(--space-5)) var(--space-4) calc(-1 * var(--space-5));
}

.project-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.project-card:hover .project-cover img {
  transform: scale(1.08);
}

/* Project icon hover animation */
.project-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 300ms ease;
}

.project-card:hover .project-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
}

.project-stats-badge {
  display: flex;
  gap: var(--space-2);
}

.stat-badge {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  transition: transform 200ms ease, background-color 200ms ease, color 200ms ease;
}

.project-card:hover .stat-badge {
  transform: translateY(-2px);
  background: var(--color-bg-tertiary);
  color: var(--color-text);
}

.project-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
}

.project-title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.project-title a:hover {
  color: var(--color-primary);
}

.project-description {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.project-footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.language-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: transform 200ms ease, color 200ms ease;
  cursor: pointer;
}

.language-badge:hover {
  transform: translateY(-2px);
  color: var(--color-text);
}

.language-badge:hover .language-dot {
  transform: scale(1.2);
}

.language-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  transition: transform 200ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.language-badge.java .language-dot {
  background: var(--color-java);
}

.language-badge.go .language-dot {
  background: var(--color-go);
}

.language-badge.typescript .language-dot {
  background: #3178C6;
}

.contribution-badge {
  padding: var(--space-1) var(--space-2);
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: white;
  font-weight: var(--font-medium);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.contribution-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.award-badge {
  padding: var(--space-1) var(--space-2);
  background: linear-gradient(135deg, #F59E0B 0%, #F97316 100%);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: white;
  font-weight: var(--font-medium);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.award-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

/* ============================================
   Tech Stack
   ============================================ */

/* ============================================
   Skill Galaxy - Interactive Cloud Visualization
   ============================================ */

.skill-galaxy {
  position: relative;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: var(--space-12) var(--space-4);
  overflow: hidden;
  border-radius: var(--radius-2xl);
}

/* Nebula background effect */
.skill-galaxy-bg {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-2xl);
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 30%, rgba(6, 182, 212, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 50% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

/* Mouse spotlight overlay */
.skill-galaxy::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-2xl);
  background: radial-gradient(
    circle 300px at var(--mx, 50%) var(--my, 50%),
    rgba(99, 102, 241, 0.06) 0%,
    transparent 100%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.skill-galaxy:hover::after {
  opacity: 1;
}

/* The cloud container */
.skill-galaxy-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-8) var(--space-4);
  position: relative;
  z-index: 1;
  min-height: 320px;
}

/* Floating drift keyframe */
@keyframes skillDrift {
  0%, 100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(calc(var(--drift-x) * 0.6), calc(var(--drift-y) * 0.4));
  }
  50% {
    transform: translate(var(--drift-x), var(--drift-y));
  }
  75% {
    transform: translate(calc(var(--drift-x) * 0.3), calc(var(--drift-y) * 0.7));
  }
}

/* Subtle glow pulse */
@keyframes glowPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* Base skill node */
.skill-node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: var(--font-semibold);
  cursor: default;
  position: relative;
  white-space: nowrap;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition:
    border-color 0.3s ease,
    box-shadow 0.4s ease,
    transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
    background 0.3s ease;
  animation: skillDrift var(--dur, 8s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);

  /* Dynamic color from CSS vars */
  --node-color: hsl(var(--hue, 220), var(--sat, 60%), 60%);
  --node-glow: hsl(var(--hue, 220), var(--sat, 60%), 50%);
  --node-bg: hsla(var(--hue, 220), var(--sat, 60%), 50%, 0.12);
  --node-border: hsla(var(--hue, 220), var(--sat, 60%), 50%, 0.25);

  color: var(--node-color);
  background: var(--node-bg);
}

/* Glow ring on hover */
.skill-node::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--radius-full);
  background: hsla(var(--hue, 220), var(--sat, 60%), 50%, 0.15);
  opacity: 0;
  filter: blur(8px);
  transition: opacity 0.4s ease;
  z-index: -1;
}

.skill-node:hover {
  border-color: var(--node-border);
  transform: scale(1.15) !important;
  animation-play-state: paused;
  background: hsla(var(--hue, 220), var(--sat, 60%), 50%, 0.2);
  box-shadow:
    0 0 20px hsla(var(--hue, 220), var(--sat, 60%), 50%, 0.3),
    0 4px 16px rgba(0, 0, 0, 0.3);
  z-index: 10;
}

.skill-node:hover::before {
  opacity: 1;
}

/* ---- Proficiency size tiers ---- */

/* Expert: largest, most prominent */
.skill-node.skill-expert {
  font-size: 1.5rem;
  padding: var(--space-3) var(--space-6);
  font-weight: var(--font-bold);
  --node-bg: hsla(var(--hue), var(--sat), 50%, 0.18);
  --node-border: hsla(var(--hue), var(--sat), 50%, 0.35);
  text-shadow: 0 0 20px hsla(var(--hue), var(--sat), 50%, 0.4);
}

/* Advanced: medium-large */
.skill-node.skill-advanced {
  font-size: 1.15rem;
  padding: var(--space-2) var(--space-5);
  font-weight: var(--font-semibold);
  --node-bg: hsla(var(--hue), var(--sat), 50%, 0.12);
}

/* Proficient: medium */
.skill-node.skill-proficient {
  font-size: 0.95rem;
  padding: var(--space-2) var(--space-4);
  font-weight: var(--font-medium);
  --node-bg: hsla(var(--hue), var(--sat), 50%, 0.08);
  opacity: 0.85;
}

/* Familiar: smaller */
.skill-node.skill-familiar {
  font-size: 0.825rem;
  padding: 6px var(--space-3);
  font-weight: var(--font-medium);
  --node-bg: hsla(var(--hue), var(--sat), 50%, 0.06);
  opacity: 0.65;
}

.skill-node.skill-familiar:hover {
  opacity: 1;
}

/* Practice: accent style with dashed border */
.skill-node.skill-practice {
  font-size: 0.875rem;
  padding: 6px var(--space-3);
  font-weight: var(--font-medium);
  border: 1px dashed hsla(var(--hue), var(--sat), 50%, 0.3);
  --node-bg: hsla(var(--hue), var(--sat), 50%, 0.06);
  font-style: italic;
  opacity: 0.75;
}

.skill-node.skill-practice:hover {
  opacity: 1;
  border-style: solid;
}

/* Proficiency Legend */
.skill-galaxy-legend {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-6);
  position: relative;
  z-index: 1;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-dot.expert-dot {
  background: #10B981;
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.6);
  width: 10px;
  height: 10px;
}

.legend-dot.advanced-dot {
  background: #3B82F6;
  box-shadow: 0 0 5px rgba(59, 130, 246, 0.5);
  width: 9px;
  height: 9px;
}

.legend-dot.proficient-dot {
  background: #8B5CF6;
  box-shadow: 0 0 4px rgba(139, 92, 246, 0.4);
}

.legend-dot.familiar-dot {
  background: #64748B;
}

.legend-dot.practice-dot {
  background: transparent;
  border: 1.5px dashed #6366F1;
}

/* Responsive: mobile compact layout */
@media (max-width: 768px) {
  .skill-galaxy {
    padding: var(--space-6) var(--space-2);
  }

  .skill-galaxy-cloud {
    gap: var(--space-2);
    padding: var(--space-4) var(--space-2);
    min-height: auto;
  }

  .skill-node.skill-expert {
    font-size: 1.2rem;
    padding: var(--space-2) var(--space-4);
  }

  .skill-node.skill-advanced {
    font-size: 1rem;
    padding: var(--space-2) var(--space-3);
  }

  .skill-node.skill-proficient {
    font-size: 0.85rem;
    padding: 5px var(--space-3);
  }

  .skill-node.skill-familiar,
  .skill-node.skill-practice {
    font-size: 0.75rem;
    padding: 4px var(--space-2);
  }

  /* Reduce drift on mobile for less visual noise */
  .skill-node {
    --drift-x: 4px !important;
    --drift-y: 3px !important;
  }

  .skill-galaxy-legend {
    gap: var(--space-3);
  }
}

/* Light theme adjustments */
[data-theme="light"] .skill-galaxy-bg {
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 30%, rgba(6, 182, 212, 0.04) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 50% 80%, rgba(139, 92, 246, 0.04) 0%, transparent 70%);
}

[data-theme="light"] .skill-node {
  --node-color: hsl(var(--hue, 220), var(--sat, 60%), 40%);
  --node-bg: hsla(var(--hue, 220), var(--sat, 60%), 50%, 0.08);
}

[data-theme="light"] .skill-node.skill-expert {
  --node-bg: hsla(var(--hue), var(--sat), 50%, 0.12);
  text-shadow: none;
}

[data-theme="light"] .skill-galaxy::after {
  background: radial-gradient(
    circle 300px at var(--mx, 50%) var(--my, 50%),
    rgba(99, 102, 241, 0.04) 0%,
    transparent 100%
  );
}

/* Reduced motion: disable drift animation */
@media (prefers-reduced-motion: reduce) {
  .skill-node {
    animation: none !important;
  }
}

/* ============================================
   Contributions
   ============================================ */

/* ============================================
   Contributions — Editorial Layout
   ============================================ */

.contributions-enhanced {
  max-width: var(--container-xl);
  margin: 0 auto;
}

/* Section label with line */
.contrib-section {
  margin-bottom: var(--space-10);
}

.contrib-section-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.contrib-label-icon {
  color: var(--color-primary);
  font-size: var(--text-sm);
}

.contrib-label-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-border), transparent);
}

/* ---- Project Tiles (Personal Projects) ---- */

.project-tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.project-tile {
  display: flex;
  text-decoration: none;
  color: inherit;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition:
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.project-tile:hover {
  border-color: var(--accent, var(--color-primary));
  box-shadow:
    0 0 0 1px var(--accent, var(--color-primary)),
    0 8px 24px rgba(0, 0, 0, 0.25),
    0 0 40px color-mix(in srgb, var(--accent) 15%, transparent);
  transform: translateY(-3px);
}

/* Left accent stripe */
.tile-accent {
  width: 4px;
  flex-shrink: 0;
  background: var(--accent, var(--color-primary));
  border-radius: 4px 0 0 4px;
  opacity: 0.6;
  transition: opacity 0.3s ease, width 0.3s ease;
}

.project-tile:hover .tile-accent {
  opacity: 1;
  width: 5px;
}

.tile-body {
  padding: var(--space-5) var(--space-5) var(--space-5) var(--space-4);
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

/* Header row: icon + title + arrow */
.tile-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.tile-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent, var(--color-primary));
  flex-shrink: 0;
  transition: background 0.3s ease, transform 0.3s ease;
}

.project-tile:hover .tile-icon {
  background: color-mix(in srgb, var(--accent) 25%, transparent);
  transform: scale(1.1);
}

.tile-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text);
  flex: 1;
  min-width: 0;
}

.tile-arrow {
  font-size: var(--text-lg);
  color: var(--color-text-subtle);
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
}

.project-tile:hover .tile-arrow {
  transform: translateX(4px);
  color: var(--accent, var(--color-primary));
}

.tile-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-3);
  flex: 1;
}

.tile-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.tile-role {
  display: inline-flex;
  align-items: center;
  padding: 3px var(--space-3);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--accent, var(--color-primary));
  letter-spacing: 0.02em;
}

.tile-lang {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
}

.lang-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---- Contribution River (Major Contributions) ---- */

.contrib-river {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  padding: var(--space-2) 0;
  scrollbar-width: none;
}

.contrib-river::-webkit-scrollbar {
  display: none;
}

.river-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  text-decoration: none;
  color: inherit;
  padding: var(--space-5) var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  flex: 1;
  min-width: 180px;
  transition:
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.river-node:hover {
  border-color: var(--accent, var(--color-primary));
  box-shadow:
    0 0 0 1px var(--accent, var(--color-primary)),
    0 8px 20px rgba(0, 0, 0, 0.2),
    0 0 30px color-mix(in srgb, var(--accent) 12%, transparent);
  transform: translateY(-4px);
}

.river-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent, var(--color-primary));
  margin-bottom: var(--space-3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.river-node:hover .river-icon {
  transform: scale(1.12);
  box-shadow: 0 0 20px color-mix(in srgb, var(--accent) 30%, transparent);
}

.river-title {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.river-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-3);
}

.river-role {
  display: inline-flex;
  align-items: center;
  padding: 3px var(--space-3);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: var(--font-semibold);
  color: var(--accent, var(--color-primary));
  letter-spacing: 0.02em;
}

/* Connector dots between river nodes */
.river-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0 var(--space-1);
  color: var(--color-text-subtle);
}

/* ---- Inline Stats Banner ---- */

.contrib-stats-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-6) var(--space-4);
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.contrib-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.contrib-stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  font-family: var(--font-heading);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contrib-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.contrib-stat-divider {
  width: 1px;
  height: 32px;
  background: var(--color-border);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .project-tiles {
    grid-template-columns: 1fr;
  }

  .contrib-river {
    flex-direction: column;
    gap: var(--space-3);
  }

  .river-connector {
    transform: rotate(90deg);
    padding: 0;
  }

  .river-node {
    min-width: auto;
  }

  .contrib-stats-banner {
    gap: var(--space-4);
  }

  .contrib-stat-value {
    font-size: var(--text-xl);
  }
}

@media (max-width: 480px) {
  .contrib-stats-banner {
    flex-direction: column;
    gap: var(--space-4);
  }

  .contrib-stat-divider {
    width: 40px;
    height: 1px;
  }
}

/* LEGACY: keep stat-card hover for backwards compat */
.stat-card:hover {
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-4px) scale(1.02);
}

.stat-icon {
  font-size: var(--text-3xl);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.stat-card:hover .stat-icon {
  transform: scale(1.2) rotate(-10deg);
}

.stat-content {
  flex: 1;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  font-family: var(--font-mono);
}

/* ============================================
   Awards Section
   ============================================ */

/* ============================================
   Card Illustrations — Shared Decorative Images
   ============================================ */

.card-illustration {
  position: absolute;
  pointer-events: none;
  object-fit: cover;
  z-index: 0;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.card-illustration--hero {
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 200px;
  height: 200px;
  opacity: 0.15;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.card-illustration--card {
  right: -10%;
  bottom: -15%;
  width: 140px;
  height: 140px;
  opacity: 0.1;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

/* Hover: reveal illustrations slightly */
.award-hero:hover .card-illustration--hero,
.article-featured:hover .card-illustration--hero {
  opacity: 0.25;
  transform: translateY(-50%) scale(1.05);
}

.article-card:hover .card-illustration--card,
.experience-content:hover .card-illustration--card {
  opacity: 0.18;
  transform: scale(1.08);
}

/* Shimmer animation for hero borders */
@keyframes borderShimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Stagger entrance for grid cards */
@keyframes cardReveal {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Awards Showcase — Hero + Grid Layout
   ============================================ */

.awards-showcase {
  max-width: var(--container-lg);
  margin: 0 auto var(--space-6);
}

/* Hero Award — Gold Standout */
.award-hero {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-7) var(--space-8);
  margin-bottom: var(--space-5);
  background: color-mix(in srgb, var(--accent) 6%, var(--color-bg-card));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.award-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  background-size: 200% 100%;
  animation: borderShimmer 4s ease-in-out infinite;
}

.award-hero-glow {
  position: absolute;
  top: -60%;
  right: -5%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 12%, transparent), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.award-hero:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  box-shadow:
    0 0 40px color-mix(in srgb, var(--accent) 8%, transparent),
    0 8px 32px rgba(0, 0, 0, 0.25);
}

.award-hero:hover .award-hero-badge {
  transform: scale(1.1) rotate(-5deg);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.award-hero-badge {
  font-size: 2.8rem;
  z-index: 1;
  flex-shrink: 0;
  filter: drop-shadow(0 0 12px color-mix(in srgb, var(--accent) 35%, transparent));
}

.award-hero-content {
  z-index: 1;
  flex: 1;
  min-width: 0;
}

.award-hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.award-hero-year {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent);
  font-weight: var(--font-bold);
  letter-spacing: 0.05em;
}

.award-hero-label {
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  padding: 2px var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

.award-hero-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  line-height: 1.3;
}

.award-hero-project {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

/* Awards Grid — 3-column cards */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.award-card {
  position: relative;
  padding: var(--space-5);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.25s ease;
  text-decoration: none;
  color: inherit;
}

.award-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 20%, transparent));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.award-card:hover {
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent) 4%, var(--color-bg-card));
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.2),
    0 0 0 1px color-mix(in srgb, var(--accent) 10%, transparent);
  transform: translateY(-3px);
}

.award-card:hover .award-card-badge {
  transform: scale(1.15);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.award-card:hover::before {
  opacity: 1;
}

.award-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.award-card-badge {
  font-size: 1.5rem;
}

.award-card-year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent, var(--color-primary));
  font-weight: var(--font-semibold);
  letter-spacing: 0.02em;
}

.award-card-title {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  line-height: 1.4;
}

.award-card-project {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.award-card-label {
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  padding: 2px var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  display: inline-block;
}

/* Achievement Badges — Unified */
.achievement-badges {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: var(--container-lg);
  margin: 0 auto;
}

.badge-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.badge-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.badge-chip:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-secondary);
}

.badge-chip span:first-child {
  font-size: 1rem;
}

.badge-chip strong {
  color: var(--color-primary);
  font-weight: var(--font-bold);
}

.badge-chip.gh {
  border-style: dashed;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Awards Responsive */
@media (max-width: 1024px) {
  .awards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-illustration--hero {
    width: 160px;
    height: 160px;
    opacity: 0.1;
  }
}

@media (max-width: 768px) {
  .awards-grid {
    grid-template-columns: 1fr;
  }

  .award-hero {
    flex-direction: column;
    text-align: center;
    padding: var(--space-5) var(--space-4);
    gap: var(--space-4);
  }

  .award-hero-meta {
    justify-content: center;
  }

  .award-hero-title {
    font-size: var(--text-xl);
  }

  .award-hero-badge {
    font-size: 2.2rem;
  }

  .card-illustration--hero {
    width: 120px;
    height: 120px;
    right: -10%;
    opacity: 0.08;
  }

  .card-illustration--card {
    width: 100px;
    height: 100px;
    opacity: 0.06;
  }
}

/* ============================================
   Table of Contents (TOC) Sidebar
   ============================================ */

.toc-sidebar {
  position: fixed;
  right: var(--space-6);
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-xl);
  transition: all var(--transition-base);
}

.toc-sidebar.toc-hidden {
  display: none;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toc-item {
  margin: 0;
}

.toc-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.toc-link:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  transform: translateX(-2px);
}

.toc-link.toc-active {
  background: var(--gradient-primary);
  color: white;
  font-weight: var(--font-semibold);
  box-shadow: var(--glow-primary);
}

.toc-icon {
  font-size: var(--text-base);
  line-height: 1;
}

.toc-label {
  line-height: 1.4;
}

@media (max-width: 1199px) {
  .toc-sidebar {
    display: none;
  }
}

/* Particle system removed in UI modernization */

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {

  /* Respect user's motion preferences */
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   Touch-Friendly Interactions
   ============================================ */

/* Ensure touch targets are at least 44x44px */
@media (pointer: coarse) {
  .btn,
  .nav-link,
  .writing-card,
  .project-card,
  .contact-item,
  button {
    min-height: 44px;
    min-width: 44px;
  }

  .project-quick-view-btn {
    padding: var(--space-3) var(--space-4);
  }
}

/* Touch feedback for mobile devices */
@media (hover: none) and (pointer: coarse) {
  .btn:active,
  .nav-link:active {
    background: var(--color-bg-tertiary);
    transform: scale(0.98);
  }

  .project-card:active {
    transform: scale(0.98);
  }

  .writing-card:active {
    transform: scale(0.98);
  }
}

/* ============================================
   Enhanced Focus Styles
   ============================================ */

/* Better focus indicators for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip link enhancement */
.skip-to-content {
  top: -100%;
  transition: top var(--transition-base);
}

.skip-to-content:focus {
  top: var(--space-4);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn-primary {
    border: 2px solid currentColor;
  }

  .project-card,
  .writing-card {
    border-width: 2px;
  }
}

/* Mobile Navigation */

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 32px;
  padding: 4px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: var(--z-sticky);
}

.mobile-menu-btn .hamburger {
  width: 24px;
  height: 3px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.mobile-menu-btn.active .hamburger:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}

.mobile-menu-btn.active .hamburger:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active .hamburger:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  pointer-events: none;
  visibility: hidden;
}

.mobile-nav.active {
  pointer-events: auto;
  visibility: visible;
}

.mobile-nav.active {
  pointer-events: auto;
}

.mobile-nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-nav.active .mobile-nav-backdrop {
  opacity: 1;
}

.mobile-nav-content {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 80%;
  max-width: 300px;
  background: var(--color-bg-secondary);
  border-left: 1px solid var(--color-border);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.mobile-nav.active .mobile-nav-content {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.mobile-nav-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  gap: var(--space-2);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-primary);
}

.mobile-nav-footer {
  margin-top: auto;
  padding: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* ============================================
   Writing/Blog Section - Modern Card Design
   ============================================ */

/* ============================================
   Articles Showcase — Featured + Grid Layout
   ============================================ */

.articles-showcase {
  max-width: var(--container-lg);
  margin: 0 auto;
}

/* Featured Article — Hero Card */
.article-featured {
  display: block;
  position: relative;
  padding: var(--space-7) var(--space-8);
  margin-bottom: var(--space-5);
  text-decoration: none;
  color: inherit;
  background: color-mix(in srgb, var(--accent) 5%, var(--color-bg-card));
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.4s ease;
}

.article-featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  background-size: 200% 100%;
  animation: borderShimmer 4s ease-in-out infinite;
}

.article-featured-glow {
  position: absolute;
  bottom: -40%;
  right: -5%;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 10%, transparent), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.article-featured:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  box-shadow:
    0 0 30px color-mix(in srgb, var(--accent) 6%, transparent),
    0 8px 32px rgba(0, 0, 0, 0.2);
}

.article-featured .article-tag {
  position: relative;
  z-index: 1;
  margin-bottom: var(--space-4);
}

.article-featured-title {
  position: relative;
  z-index: 1;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
  transition: color 0.2s ease;
}

.article-featured:hover .article-featured-title {
  color: var(--accent, var(--color-primary));
}

.article-featured-excerpt {
  position: relative;
  z-index: 1;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  max-width: 600px;
}

.article-featured .article-arrow {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 1;
}

/* Shared Article Styles */
.article-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px var(--space-3);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--accent, var(--color-primary));
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.article-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: var(--color-text-subtle);
  flex-shrink: 0;
  transition: color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.article-featured:hover .article-arrow,
.article-card:hover .article-arrow {
  color: var(--accent, var(--color-primary));
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  transform: translate(2px, -2px);
}

/* Articles Grid — 2-column cards */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.article-card {
  display: block;
  position: relative;
  padding: var(--space-5);
  text-decoration: none;
  color: inherit;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.25s ease;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 20%, transparent));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.article-card:hover {
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent) 4%, var(--color-bg-card));
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.2),
    0 0 0 1px color-mix(in srgb, var(--accent) 10%, transparent);
  transform: translateY(-3px);
}

.article-card:hover::before {
  opacity: 1;
}

.article-card .article-tag {
  margin-bottom: var(--space-3);
}

.article-card-title {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
  transition: color 0.2s ease;
}

.article-card:hover .article-card-title {
  color: var(--accent, var(--color-primary));
}

.article-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card .article-arrow {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
}

/* Articles Responsive */
@media (max-width: 768px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }

  .article-featured {
    padding: var(--space-5) var(--space-4);
  }

  .article-featured-title {
    font-size: var(--text-xl);
    padding-right: var(--space-8);
  }

  .article-featured .article-arrow {
    top: var(--space-5);
    right: var(--space-4);
  }

  .article-card .article-card-title {
    padding-right: var(--space-8);
  }
}

/* ============================================
   AI Infra Section
   ============================================ */

.section-illustration {
  max-width: 700px;
  margin: 0 auto var(--space-8);
  border-radius: var(--radius-xl);
  overflow: hidden;
  opacity: 0.85;
}

.section-illustration img {
  width: 100%;
  height: auto;
  display: block;
}

/* Inline illustration merged into card */
.infra-hero-card > .card-illustration-inline {
  margin: calc(-1 * var(--space-8)) calc(-1 * var(--space-8)) var(--space-6);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  overflow: hidden;
  max-height: 180px;
}

.infra-hero-card > .card-illustration-inline img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  opacity: 0.7;
}

/* Hobbies inline illustration */
.hobbies-illustration-inline {
  max-width: 900px;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-xl);
  overflow: hidden;
  max-height: 160px;
}

.hobbies-illustration-inline img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
  opacity: 0.7;
}

@media (max-width: 768px) {
  .infra-hero-card > .card-illustration-inline {
    max-height: 120px;
  }

  .infra-hero-card > .card-illustration-inline img {
    height: 120px;
  }

  .hobbies-illustration-inline {
    max-height: 100px;
  }

  .hobbies-illustration-inline img {
    height: 100px;
  }
}

.infra-showcase {
  max-width: 900px;
  margin: 0 auto;
}

.infra-hero-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.infra-hero-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
}

.infra-hero-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.infra-hero-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.infra-hero-name a {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.infra-hero-name a:hover {
  color: var(--color-primary);
}

.infra-hero-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: 2px;
}

.infra-github-link {
  margin-left: auto;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.infra-github-link:hover {
  color: var(--color-primary);
}

.infra-hero-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.infra-pipeline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: var(--space-4);
  background: rgba(99, 102, 241, 0.04);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(99, 102, 241, 0.1);
}

.pipeline-step {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.pipeline-step:hover {
  border-color: var(--step-color, var(--color-primary));
  color: var(--step-color, var(--color-primary));
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.pipeline-icon {
  font-size: 14px;
}

.pipeline-arrow {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  opacity: 0.5;
}

@media (max-width: 768px) {
  .infra-hero-card {
    padding: var(--space-5);
  }

  .infra-hero-icon {
    font-size: 2rem;
  }

  .infra-pipeline {
    gap: 4px;
    padding: var(--space-3);
  }

  .pipeline-step {
    padding: 4px 8px;
    font-size: 11px;
  }

  .pipeline-arrow {
    font-size: 10px;
  }
}

/* ============================================
   Hobbies Section
   ============================================ */

.hobbies-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto;
}

.hobby-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  transition: all var(--transition-base);
  cursor: default;
}

.hobby-card:hover {
  border-color: var(--hobby-color, var(--color-primary));
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.hobby-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--space-2);
}

.hobby-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.hobby-note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

@media (max-width: 768px) {
  .hobbies-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .hobby-card {
    padding: var(--space-4);
  }

  .hobby-icon {
    font-size: 1.5rem;
  }
}

/* ============================================
   Contact Section
   ============================================ */

.contact-section {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  max-width: var(--container-xl);
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.social-links-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.contact-social-bar {
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-subtle);
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: 20px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.social-pill:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 20px;
  transition: all var(--transition-base);
}

.contact-item:hover {
  border-color: var(--color-primary-alpha-30);
  transform: translateX(12px) scale(1.02);
  box-shadow: 0 12px 32px var(--color-primary-alpha-20), 0 0 0 1px var(--color-primary-alpha-10);
}

.contact-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 8px 20px var(--color-primary-alpha-30);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 300ms ease;
}

.contact-item:hover .contact-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 12px 30px var(--color-primary-alpha-40);
}

.contact-details h4 {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-details a,
.contact-details span {
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-base);
  font-weight: var(--font-medium);
}

.contact-details a:hover {
  color: var(--color-primary);
}

.contact-cta {
  display: flex;
  align-items: center;
}

.availability-card {
  padding: var(--space-10);
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 24px;
  width: 100%;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 300ms ease, border-color 200ms ease;
  position: relative;
  overflow: hidden;
}

/* Top gradient border */
.availability-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  opacity: 0.7;
}

.availability-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary-alpha-30);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25), 0 0 0 1px var(--color-primary-alpha-10);
}

.availability-header {
  margin-bottom: var(--space-4);
}

.availability-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.availability-status.available {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.3);
  position: relative;
}

/* Pulse animation for available status */
@keyframes availabilityPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.availability-status.available::before {
  content: '';
  position: absolute;
  left: 8px;
  width: 8px;
  height: 8px;
  background: #10B981;
  border-radius: 50%;
  animation: availabilityPulse 2s infinite;
}

.availability-status.available {
  padding-left: 24px;
}

.availability-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

.availability-interests {
  list-style: none;
  padding: 0;
  margin: 0;
}

.availability-interests li {
  padding: var(--space-2) 0;
  padding-left: var(--space-6);
  position: relative;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.availability-interests li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* Contact Actions */
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.contact-actions .btn {
  flex: 1;
  min-width: 160px;
  justify-content: center;
}

/* ============================================
   Video Modal
   ============================================ */

.video-modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.video-modal.active {
  opacity: 1;
  visibility: visible;
}

.video-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
}

.video-modal-content {
  position: relative;
  width: 90vw;
  max-width: 1100px;
  transform: scale(0.9);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.video-modal.active .video-modal-content {
  transform: scale(1);
}

.video-modal-content video {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
  outline: 1px solid rgba(255, 255, 255, 0.08);
}

.video-modal-close {
  position: absolute;
  top: -44px;
  right: 0;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  transition: all 0.2s ease;
}

.video-modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

@media (max-width: 768px) {
  .video-modal-content {
    width: 95vw;
  }
  .video-modal-close {
    top: -40px;
    width: 32px;
    height: 32px;
  }
  .video-modal-close svg {
    width: 18px;
    height: 18px;
  }
}

/* ============================================
   Project Modal
   ============================================ */

.project-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.project-modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-base);
}

.project-modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 1;
}

.modal-close:hover {
  background: var(--color-bg-card);
  color: var(--color-text);
  border-color: var(--color-primary);
}

.modal-body {
  padding: var(--space-8);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.modal-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.modal-meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.modal-stats {
  display: flex;
  gap: var(--space-2);
}

.modal-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.modal-description {
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.modal-tech-stack {
  margin-bottom: var(--space-6);
}

.modal-tech-stack h4 {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.modal-links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.project-quick-view-btn {
  margin-left: auto;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.project-quick-view-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* Modal mobile responsiveness */
@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    max-height: 95vh;
  }

  .modal-body {
    padding: var(--space-6);
  }

  .modal-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .modal-stats {
    justify-content: center;
  }

  .modal-links {
    flex-direction: column;
  }

  .modal-links .btn {
    width: 100%;
  }
}

/* ============================================
   Footer - Modern Glassmorphism Design
   ============================================ */

.footer {
  padding: var(--space-20) var(--space-6);
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.5) 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
  max-width: var(--container-lg);
  margin: 0 auto;
  text-align: center;
}

.footer-quote {
  font-size: var(--text-xl);
  font-style: italic;
  font-weight: var(--font-medium);
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent), var(--color-primary));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  padding: var(--space-2) var(--space-4);
  border-radius: 10px;
  font-weight: var(--font-medium);
  position: relative;
  overflow: hidden;
}

.footer-links a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 300ms ease, left 300ms ease;
}

.footer-links a:hover {
  color: var(--color-text);
  background: var(--color-primary-alpha-10);
  transform: translateY(-2px);
}

.footer-links a:hover::before {
  width: 80%;
  left: 10%;
}

.footer-public-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-3, 0.75rem);
  margin: 0 0 var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer-public-stats strong {
  color: var(--color-text);
  font-weight: var(--font-bold);
}

.footer-auth-button {
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
}

.footer-built-with {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  font-style: italic;
  letter-spacing: 0.02em;
}

/* ============================================
   Mobile Navigation
   ============================================ */

/* Medium screen breakpoint (tablets) */
@media (max-width: 1024px) {
  .nav-links {
    gap: var(--space-1);
  }

  .nav-link {
    font-size: var(--text-xs);
    padding: var(--space-2);
  }

  .nav-logo span {
    display: none;
  }

  .nav-actions {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-header {
    height: var(--header-height-mobile);
  }

  .nav-container {
    padding: 0 var(--space-4);
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-logo span {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  /* Hero Section Mobile */
  .hero {
    padding: calc(var(--header-height-mobile) + var(--space-6)) var(--space-4) var(--space-16);
  }

  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .hero-description {
    font-size: var(--text-sm);
  }

  .hero-skills {
    gap: var(--space-2);
  }

  .skill-tag {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
  }

  /* Section Titles Mobile */
  .section-title {
    font-size: var(--text-2xl);
  }

  .section-description {
    font-size: var(--text-base);
  }

  /* Section Bridge Mobile */
  .section-bridge {
    height: 24px;
  }

  .section-idx {
    font-size: 0.6rem;
  }

  /* About Grid Mobile */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .about-card {
    padding: var(--space-6);
  }

  /* Experience Timeline Mobile */
  .experience-card {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
  }

  .experience-card::before {
    display: none;
  }

  .experience-period {
    text-align: left;
    padding-left: var(--space-4);
  }

  .experience-period::before {
    right: auto;
    left: 0;
  }

  .experience-content {
    padding: var(--space-6);
  }

  .experience-highlights {
    grid-template-columns: 1fr;
  }

  .highlight-item {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
  }

  .highlight-icon-wrap {
    margin-bottom: 0;
  }

  /* Projects Grid Mobile */
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .project-card {
    padding: var(--space-6);
  }

  /* Tech Stack Mobile */
  .tech-categories {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .tech-tags {
    justify-content: center;
  }

  /* Contributions Grid Mobile */
  .contributions-grid {
    grid-template-columns: 1fr;
  }

  /* Awards Grid Mobile */
  .awards-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  /* Writing section now uses reading-list, no grid override needed */

  /* Contact Section Mobile */
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .contact-item {
    padding: var(--space-5);
  }

  .availability-card {
    padding: var(--space-6);
  }

  .contact-actions {
    flex-direction: column;
  }

  .contact-actions .btn {
    width: 100%;
  }

  /* Hide particles on mobile */
  .particles-container {
    display: none;
  }

  /* Footer Mobile */
  .footer {
    padding: var(--space-12) var(--space-6);
  }

  .footer-quote {
    font-size: var(--text-base);
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* ============================================
   Utilities
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-8 { margin-top: var(--space-8); }
.mt-16 { margin-top: var(--space-16); }

.hidden { display: none; }

/* ============================================
   Optimized Hero Section - v2.0
   ============================================ */

/* Hero Background & Effects */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.6;
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: calc(var(--header-height) + var(--space-8)) var(--space-4) var(--space-12);
  text-align: center;
}

/* Hero Avatar with Glow Ring */
.hero-avatar-wrap {
  position: relative;
  display: inline-block;
  margin-bottom: var(--space-6);
}

.hero-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--color-border);
  object-fit: cover;
  position: relative;
  z-index: 2;
}

.hero-avatar-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--color-primary),
    var(--color-secondary),
    var(--color-accent-cyan),
    var(--color-primary)
  );
  animation: avatarRingRotate 8s linear infinite;
  opacity: 0.8;
}

.hero-avatar-ring::before {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--color-bg);
  border-radius: 50%;
}

@keyframes avatarRingRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-status {
  position: absolute;
  bottom: 5px;
  right: 5px;
  z-index: 3;
  width: 24px;
  height: 24px;
  background: var(--color-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.status-dot {
  width: 14px;
  height: 14px;
  background: #22c55e;
  border-radius: 50%;
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.95); }
}

/* Hero Header */
.hero-header {
  margin-bottom: var(--space-6);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: var(--font-bold);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-3);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary-light) 50%, var(--color-secondary-light) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: titleGradient 5s ease infinite;
}

@keyframes titleGradient {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(var(--text-lg), 3vw, var(--text-xl));
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.subtitle-highlight {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.hero-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto;
}

/* Quick Facts Bar */
.hero-facts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2) var(--space-4);
  margin-bottom: var(--space-6);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
}

.fact-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
}

.fact-number {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text);
}

.fact-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.fact-separator {
  color: var(--color-border-light);
  font-weight: var(--font-bold);
}

.fact-badge-group {
  display: flex;
  gap: var(--space-2);
}

.fact-badge {
  padding: var(--space-1) var(--space-2);
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-accent-indigo-light);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-sm);
}

/* CTA Buttons */
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.hero-cta .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  transition: all 0.2s ease;
  text-decoration: none;
}

.hero-cta .btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.hero-cta .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.hero-cta .btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-cta .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.hero-cta .btn-video {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.hero-cta .btn-video svg {
  color: var(--color-primary);
  transition: transform 0.3s ease;
}

.hero-cta .btn-video:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
}

.hero-cta .btn-video:hover svg {
  transform: scale(1.2);
}

/* Bio Card */
.hero-bio-card {
  max-width: 600px;
  margin: 0 auto var(--space-6);
  padding: var(--space-4) var(--space-6);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(8px);
}

.hero-bio-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

.hero-bio-card p strong {
  color: var(--color-primary-light);
  font-weight: var(--font-bold);
}

/* Social Matrix — Full Platform Grid */
.social-matrix {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.social-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.social-group-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
  padding-right: var(--space-1);
}

.social-group-pills {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.social-links-bar .social-group-label {
  width: 100%;
  margin-top: var(--space-2);
  margin-bottom: var(--space-1);
}

.social-links-bar .social-group-label:first-child {
  margin-top: 0;
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.social-pill svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.social-pill:hover {
  background: color-mix(in srgb, var(--brand) 12%, transparent);
  border-color: color-mix(in srgb, var(--brand) 30%, transparent);
  color: var(--brand, var(--color-text));
  transform: translateY(-2px);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--brand) 15%, transparent);
}

/* WeChat tooltip preserved */
.social-pill.social-wechat {
  position: relative;
}

.social-pill.social-wechat .wechat-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: var(--space-2);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  pointer-events: none;
  z-index: 10;
}

.social-pill.social-wechat .wechat-tooltip img {
  display: block;
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
}

.social-pill.social-wechat .wechat-tooltip span {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}

.social-pill.social-wechat:hover .wechat-tooltip,
.social-pill.social-wechat:focus .wechat-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Scroll Indicator — hidden (hero content is rich enough) */
/* ============================================
   Scroll Progress Bar — CSS Scroll-Driven
   ============================================ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent-cyan) 50%, var(--color-secondary) 100%);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 9999;
  animation: scroll-progress-fill linear;
  animation-timeline: scroll();
}

@keyframes scroll-progress-fill {
  to { transform: scaleX(1); }
}

/* Fallback for browsers without scroll-timeline */
@supports not (animation-timeline: scroll()) {
  .scroll-progress { display: none; }
}

/* Mobile Adjustments */
@media (max-width: 768px) {
  .hero-avatar {
    width: 100px;
    height: 100px;
  }

  .hero-facts {
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
  }

  .fact-badge-group {
    display: none;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 200px;
    justify-content: center;
  }

  .hero-bio-card {
    padding: var(--space-3) var(--space-4);
  }
}

/* Light Theme Adjustments */
[data-theme="light"] .hero-facts,
[data-theme="light"] .hero-bio-card,
[data-theme="light"] .social-pill {
  background: rgba(0, 0, 0, 0.02);
  border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .fact-badge {
  background: rgba(99, 102, 241, 0.1);
}

[data-theme="light"] .hero-cta .btn-secondary {
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.1);
  color: var(--color-text);
}

[data-theme="light"] .hero-cta .btn-secondary:hover {
  background: rgba(0, 0, 0, 0.08);
}

  margin-bottom: var(--space-2);
}

.hero-description {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* Bento Grid Layout */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(160px, auto);
  gap: var(--bento-grid-gap);
  max-width: 1000px;
  margin: var(--space-10) auto;
  padding: 0 var(--space-4);
}

.bento-item {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-5);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.bento-item:hover {
  transform: translateY(-2px);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

/* Bento Size Variants */
.bento-large {
  grid-column: span 2;
  grid-row: span 2;
}

.bento-wide {
  grid-column: span 2;
}

.bento-tall {
  grid-row: span 2;
}

/* Bento Content Styles */
.bento-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.bento-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.bento-icon {
  font-size: var(--text-2xl);
  line-height: 1;
}

.bento-header h4 {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.bento-body {
  position: relative;
  z-index: 1;
  flex: 1;
}

/* Avatar Section */
.avatar-section {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  object-fit: cover;
}

.status-badge {
  padding: var(--space-1) var(--space-3);
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
}

/* Profile Info */
.profile-info h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.profile-info .role {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.profile-info .location {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.profile-info .bio {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  text-align: left;
}

.profile-info {
  text-align: left;
}

/* Skill List */
.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.skill-name {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.skill-bar {
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.skill-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
  animation: skillBarShimmer 2s infinite;
}

@keyframes skillBarShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.skill-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width 1.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  width: 0;
  position: relative;
  overflow: hidden;
}

/* Glow effect on skill fill */
.skill-fill::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 20px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4));
  filter: blur(2px);
}

/* Project Preview */
.project-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.project-mini {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  min-height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-tertiary);
  transition: background var(--transition-base);
  cursor: pointer;
}

.project-mini:hover {
  background: var(--color-border);
}

.project-icon {
  font-size: var(--text-2xl);
  flex-shrink: 0;
}

.project-info {
  flex: 1;
}

.project-info h5 {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-0_5);
}

.project-info p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.project-stat {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* Stat Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Social Links */
.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.social-link {
  padding: var(--space-3) var(--space-4);
  min-height: 44px;
  min-width: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.social-link:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Tech Tags */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.tech-tag:hover {
  background: var(--color-bg);
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* Status Info */
.status-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.status-text {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-success);
}

.status-location {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 900px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .bento-large {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }

  .bento-large,
  .bento-wide,
  .bento-tall {
    grid-column: span 1;
    grid-row: span 1;
  }

  .hero-container {
    padding: var(--space-8) var(--space-4);
  }

  .hero-title {
    font-size: clamp(2rem, 10vw, 2.5rem);
  }

  .avatar {
    width: 60px;
    height: 60px;
  }

  .avatar-section {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .stat-grid {
    gap: var(--space-3);
  }
}

/* ============================================
   Impact Dashboard - Modern Professional
   ============================================ */

.impact-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-5);
  max-width: 1000px;
  margin: 0 auto;
}

.impact-metric {
  background: var(--card-bg);
  backdrop-filter: blur(var(--card-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--space-6);
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), border-color 200ms ease, box-shadow 300ms ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transform-style: preserve-3d;
  perspective: 1000px;
}

/* Top gradient border glow effect */
.impact-metric::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-secondary), transparent);
  opacity: 0;
  transition: opacity 300ms ease;
}

.impact-metric:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover), 0 0 30px rgba(99, 102, 241, 0.15);
}

.impact-metric:hover::before {
  opacity: 1;
}

/* Active/click effect */
.impact-metric:active {
  transform: translateY(-2px) scale(0.98);
  transition-duration: 100ms;
}

/* Number count complete pulse animation */
@keyframes metricPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.metric-value.count-complete {
  animation: metricPulse 0.5s ease;
  color: var(--color-secondary);
}

.metric-icon {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-left: auto;
  margin-right: auto;
  border-radius: var(--radius-xl);
  background: var(--color-primary-alpha-10);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), background-color 200ms ease;
}

.impact-metric:hover .metric-icon {
  transform: scale(1.1) rotate(-5deg);
  background: var(--color-primary-alpha-20);
}

/* Icon row color variants */
.impact-metric:nth-child(-n+3):hover .metric-icon {
  background: rgba(99, 102, 241, 0.2);
}

.impact-metric:nth-child(n+4):nth-child(-n+6):hover .metric-icon {
  background: rgba(16, 185, 129, 0.2);
}

.impact-metric:nth-child(n+7):hover .metric-icon {
  background: rgba(245, 158, 11, 0.2);
}

.metric-value {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-accent-cyan);
  margin-bottom: var(--space-2);
  display: block;
}

.metric-label {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.metric-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Impact metric color variants - row-based icon theming for 3x3 grid */

/* Matching icon backgrounds per row */
.impact-metric:nth-child(-n+3) .metric-icon {
  background: var(--color-primary-alpha-10);
}

.impact-metric:nth-child(n+4):nth-child(-n+6) .metric-icon {
  background: rgba(16, 185, 129, 0.1);
}

.impact-metric:nth-child(n+7) .metric-icon {
  background: rgba(245, 158, 11, 0.1);
}


@media (max-width: 640px) {
  .impact-dashboard {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .impact-metric {
    padding: var(--space-4);
  }

  .metric-value {
    font-size: var(--text-2xl);
  }
}

/* ============================================
   HR Quick Facts - Modern Style
   ============================================ */

.hr-quick-facts-container {
  max-width: 900px;
  margin: 0 auto var(--space-10);
}

.hr-quick-facts {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: var(--space-6);
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-4);
}

.quick-fact-item {
  text-align: center;
  flex: 1;
}

.quick-fact-value {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.quick-fact-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.quick-fact-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

.hr-secondary-facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.fact-badge {
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .hr-quick-facts {
    flex-direction: column;
    gap: var(--space-4);
  }

  .quick-fact-divider {
    width: 40px;
    height: 1px;
  }
}

/* ============================================
   Gallery Section - 图片相册
   ============================================ */

.gallery-section {
  padding: var(--section-spacing) 0;
  position: relative;
}

/* Gallery Filter */
.gallery-filter {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-3) var(--space-5);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

/* Shimmer effect on filter buttons */
.filter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
  transition: left 0.5s ease;
}

.filter-btn:hover::before {
  left: 100%;
}

.filter-btn:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.filter-btn.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.filter-btn.active:hover {
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
  transform: translateY(-2px);
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
  column-gap: var(--space-4);
  row-gap: var(--space-4);
}

.gallery-item {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  background: var(--color-bg-secondary);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 300ms ease;
}

/* Gradient border on hover */
.gallery-item::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 300ms ease;
  z-index: 1;
  pointer-events: none;
}

.gallery-item:hover::before {
  opacity: 1;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gallery-item:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--card-shadow-hover), 0 20px 40px rgba(0, 0, 0, 0.2);
}

.gallery-item:hover img {
  transform: scale(1.1);
}

/* Image overlay on hover */
.gallery-item::after {
  content: '🔍';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  background: rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 300ms ease;
  z-index: 2;
}

.gallery-item:hover::after {
  opacity: 1;
}

.gallery-item.hidden {
  display: none;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 400ms ease;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  position: relative;
  transform: scale(0.9);
  transition: transform 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  position: relative;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: white;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg) scale(1.1);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.lightbox-close:active {
  transform: rotate(90deg) scale(0.95);
}

/* Responsive */
@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--space-2);
  }

  .gallery-filter {
    gap: var(--space-2);
  }

  .filter-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
}

/* ============================================
   Architecture Philosophy Section
   ============================================ */
.philosophy-section {
  padding: 3rem var(--space-6) 1.5rem;
  position: relative;
}

.philosophy-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.philosophy-manifesto {
  margin: 0 0 var(--space-8);
  padding: 0;
  border: none;
}

.philosophy-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-5);
  opacity: 0.6;
}

.philosophy-text {
  font-family: var(--font-heading);
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  font-weight: 500;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin: 0;
  letter-spacing: -0.01em;
}

.philosophy-highlight {
  color: transparent;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  font-weight: 700;
}

/* Career Evolution Timeline */
.career-timeline {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  position: relative;
  margin-bottom: var(--space-8);
  padding: 0 var(--space-4);
}

.timeline-track {
  position: absolute;
  top: 8px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: var(--color-border);
  opacity: 0.3;
  border-radius: 1px;
}

.timeline-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #10B981, #3B82F6, #8B5CF6, #F59E0B);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.career-timeline.is-visible .timeline-fill,
.career-timeline:is(.is-visible) .timeline-fill {
  transform: scaleX(1);
}

.timeline-era {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
  position: relative;
  z-index: 1;
}

.timeline-marker {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--accent);
  position: relative;
  transition: all 0.3s ease;
}

.timeline-marker::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.timeline-era.active .timeline-marker {
  box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 40%, transparent);
}

.timeline-era.active .timeline-marker::after {
  opacity: 1;
  animation: pulse 2s ease-in-out infinite;
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.timeline-domain {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: -0.01em;
}

/* Three Pillars */
.philosophy-pillars {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.pillar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.pillar-icon {
  font-size: 1.1rem;
}

.pillar-label {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.pillar-divider {
  color: var(--color-text-subtle);
  opacity: 0.3;
  font-size: var(--text-lg);
  font-weight: 300;
}

/* Philosophy responsive */
@media (max-width: 768px) {
  .philosophy-section {
    padding: 2rem var(--space-4) 1rem;
  }

  .career-timeline {
    gap: 0;
    padding: 0;
  }

  .timeline-track {
    left: 8%;
    right: 8%;
  }

  .timeline-domain {
    font-size: 0.65rem;
  }

  .philosophy-pillars {
    gap: var(--space-3);
  }

  .pillar-label {
    font-size: var(--text-xs);
  }
}

/* Light theme */
[data-theme="light"] .philosophy-highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
}

[data-theme="light"] .timeline-marker {
  background: var(--color-bg);
}

/* ============================================
   OpenOctopus Immersive Showcase
   ============================================ */
.octopus-showcase {
  display: grid;
  grid-template-columns: 200px 1fr;
  align-items: center;
  gap: var(--space-8);
  margin: var(--space-10) 0;
  padding: var(--space-8);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(34, 211, 238, 0.04));
  border: 1px solid rgba(99, 102, 241, 0.12);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
}

.octopus-showcase::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.octopus-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.octopus-svg {
  width: 200px;
  height: 200px;
}

/* Tentacle wave animation */
.tentacle {
  animation: tentacle-wave 3s ease-in-out infinite;
  transform-origin: 50% 0%;
}
.tentacle.t1 { animation-delay: 0s; }
.tentacle.t2 { animation-delay: 0.3s; }
.tentacle.t3 { animation-delay: 0.6s; }
.tentacle.t4 { animation-delay: 0.9s; }
.tentacle.t5 { animation-delay: 1.2s; }
.tentacle.t6 { animation-delay: 1.5s; }

@keyframes tentacle-wave {
  0%, 100% { stroke-dashoffset: 0; }
  50% { stroke-dashoffset: 4; }
}

.octopus-content {
  position: relative;
  z-index: 1;
}

.octopus-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-cyan);
  background: rgba(34, 211, 238, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(34, 211, 238, 0.2);
  margin-bottom: var(--space-3);
}

.octopus-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.octopus-tagline {
  font-size: var(--text-sm);
  color: var(--color-accent-cyan);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.octopus-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
  max-width: 480px;
}

.octopus-realms {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.realm-tag {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--c) 12%, transparent);
  color: var(--c);
  border: 1px solid color-mix(in srgb, var(--c) 20%, transparent);
}

.octopus-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent-cyan);
  text-decoration: none;
  padding: 8px 20px;
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: var(--radius-full);
  transition: all 0.25s ease;
}

.octopus-cta:hover {
  background: rgba(34, 211, 238, 0.1);
  border-color: rgba(34, 211, 238, 0.5);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(34, 211, 238, 0.15);
}

.octopus-cta svg {
  flex-shrink: 0;
}

/* OpenOctopus responsive */
@media (max-width: 768px) {
  .octopus-showcase {
    grid-template-columns: 1fr;
    text-align: center;
    padding: var(--space-6) var(--space-4);
    gap: var(--space-4);
  }

  .octopus-visual {
    order: -1;
  }

  .octopus-svg {
    width: 150px;
    height: 150px;
  }

  .octopus-realms {
    justify-content: center;
  }

  .octopus-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .octopus-cta {
    margin: 0 auto;
  }
}

/* Light theme */
[data-theme="light"] .octopus-showcase {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.04), rgba(34, 211, 238, 0.03));
  border-color: rgba(99, 102, 241, 0.1);
}