/* ==========================================================================
   MODERN TECH PORTFOLIO - THANAKORN THAJAN
   Dark-First Hybrid Showcase & Interactive Architecture
   ========================================================================== */

:root {
  /* Dark Theme Palette (Default) */
  --bg-base: #080c14;
  --bg-surface: #0e1526;
  --bg-surface-elevated: #162036;
  --bg-card: rgba(14, 21, 38, 0.78);
  --bg-card-hover: rgba(22, 32, 54, 0.95);
  --bg-glass: rgba(14, 21, 38, 0.65);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.4);
  --border-glow: rgba(99, 102, 241, 0.25);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-indigo: #6366f1;
  --accent-indigo-light: #818cf8;
  --accent-indigo-glow: rgba(99, 102, 241, 0.25);
  
  --accent-emerald: #10b981;
  --accent-emerald-light: #34d399;
  --accent-emerald-glow: rgba(16, 185, 129, 0.22);
  
  --accent-cyan: #06b6d4;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  
  --gradient-tech: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --gradient-energy: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --gradient-accent: linear-gradient(135deg, #6366f1 0%, #10b981 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 70%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 36px -6px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px -5px rgba(99, 102, 241, 0.25);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Light Mode Overrides */
[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.8);
  
  --border-subtle: rgba(226, 232, 240, 0.85);
  --border-hover: rgba(99, 102, 241, 0.35);
  --border-glow: rgba(99, 102, 241, 0.15);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --accent-indigo-glow: rgba(99, 102, 241, 0.12);
  --accent-emerald-glow: rgba(16, 185, 129, 0.12);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 70%);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 35px -10px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 10px 30px -5px rgba(99, 102, 241, 0.15);
}

/* ==========================================================================
   BASE & RESET
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: 90px;
}

body {
  font-family: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.06) 0px, transparent 50%);
  background-attachment: fixed;
}

/* Accessibility focus styles */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent-indigo);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img {
  max-width: 100%;
  display: block;
}

/* ==========================================================================
   LAYOUT CONTAINERS
   ========================================================================== */

.site-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 48px 0;
  position: relative;
}

.section-header {
  margin-bottom: 28px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-indigo-light);
  background: var(--accent-indigo-glow);
  border: 1px solid rgba(99, 102, 241, 0.25);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-tag.emerald {
  color: var(--accent-emerald-light);
  background: var(--accent-emerald-glow);
  border-color: rgba(16, 185, 129, 0.25);
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.7;
}

/* ==========================================================================
   NAVBAR (Frosted Glass & Dynamic Blur)
   ========================================================================== */

.modern-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.modern-navbar.scrolled {
  background: rgba(8, 12, 20, 0.88);
  box-shadow: var(--shadow-md);
}

[data-theme="light"] .modern-navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
}

.nav-wrapper {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-item-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

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

.nav-item-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-indigo);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 9px 18px;
  background: var(--gradient-tech);
  color: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
  transition: all var(--transition-fast);
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
  color: #ffffff;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   HERO SECTION (Executive Pitch + Dynamic Bento Metrics)
   ========================================================================== */

.hero-section {
  padding-top: 130px;
  padding-bottom: 40px;
  position: relative;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(16, 185, 129, 0.08) 45%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 7px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-emerald-light);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.5rem, 4.5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.hero-title .gradient-text {
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-subtitle strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 36px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background: var(--gradient-tech);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.5);
  color: #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.hero-social-links {
  display: flex;
  align-items: center;
  gap: 14px;
}

.social-icon-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-icon-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

/* ==========================================================================
   HERO RIGHT PROFILE & METRIC CARDS
   ========================================================================== */

.hero-visual-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.hero-avatar-wrapper {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 0 auto 34px;
}

.hero-avatar-glow {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  filter: blur(16px);
  opacity: 0.6;
  transition: opacity var(--transition-normal);
}

.hero-avatar-wrapper:hover .hero-avatar-glow {
  opacity: 0.85;
  filter: blur(20px);
}

.hero-avatar-img {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-surface);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal);
}

.hero-avatar-wrapper:hover .hero-avatar-img {
  transform: scale(1.02);
}

[data-theme="light"] .hero-avatar-img {
  border-color: #ffffff;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.14);
}

/* ==========================================================================
   HERO METRIC CARDS (2x2 Grid Under Photo)
   ========================================================================== */

.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  width: 100%;
}

.hero-metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

[data-theme="light"] .hero-metric-card {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.95);
  box-shadow: 0 6px 18px -4px rgba(15, 23, 42, 0.06);
}

.hero-metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-tech);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.hero-metric-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

[data-theme="light"] .hero-metric-card:hover {
  background: #ffffff;
  box-shadow: 0 8px 24px -4px rgba(15, 23, 42, 0.1);
}

.hero-metric-card:hover::before {
  opacity: 1;
}

.metric-num {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 4px;
}

.metric-num.emerald {
  color: var(--accent-emerald-light);
}

[data-theme="light"] .metric-num.emerald {
  color: #059669;
}

.metric-num.indigo {
  color: var(--accent-indigo-light);
}

[data-theme="light"] .metric-num.indigo {
  color: #4f46e5;
}

.metric-label {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.4;
  font-weight: 500;
}

/* ==========================================================================
   FEATURED PROJECTS (BENTO GRID SHOWCASE)
   ========================================================================== */

.bento-projects-container {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.project-bento-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-bento-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Card sizes */
.project-bento-card.col-8 {
  grid-column: span 8;
}

.project-bento-card.col-4 {
  grid-column: span 4;
}

.project-bento-card.col-6 {
  grid-column: span 6;
}

.project-bento-card.col-12 {
  grid-column: span 12;
}

.project-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.project-type-tag {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo-light);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.project-type-tag.emerald {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald-light);
  border-color: rgba(16, 185, 129, 0.3);
}

.project-type-tag.amber {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.3);
}

.project-status-badge {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: ui-monospace, monospace;
}

.project-card-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.project-card-subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-indigo-light);
  margin-bottom: 16px;
}

.project-card-subtitle.emerald {
  color: var(--accent-emerald-light);
}

.project-card-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 22px;
  flex-grow: 1;
}

/* Architecture Highlight Box */
.arch-feature-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 22px;
}

.arch-feature-box h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.arch-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.arch-tag-item {
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: ui-monospace, monospace;
}

[data-theme="light"] .arch-tag-item {
  background: rgba(0, 0, 0, 0.04);
}

.credential-pill {
  background: rgba(16, 185, 129, 0.1);
  border-left: 3px solid var(--accent-emerald);
  padding: 10px 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-family: ui-monospace, monospace;
}

.credential-pill strong {
  color: var(--text-primary);
}

.project-links-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: auto;
}

.project-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.project-btn.primary {
  background: var(--accent-indigo);
  color: #ffffff;
}

.project-btn.primary:hover {
  background: var(--accent-indigo-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.project-btn.emerald {
  background: var(--accent-emerald);
  color: #ffffff;
}

.project-btn.emerald:hover {
  background: var(--accent-emerald-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.project-btn.ghost {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.project-btn.ghost:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

/* ==========================================================================
   FILTERABLE PROJECT ARCHIVE (ALL PROJECTS)
   ========================================================================== */

.archive-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-btn {
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.filter-btn.active {
  background: var(--accent-indigo);
  color: #ffffff;
  border-color: var(--accent-indigo);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.archive-projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 22px;
}

.archive-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.archive-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-md);
}

.archive-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.archive-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.archive-card-subtitle {
  font-size: 0.85rem;
  color: var(--accent-indigo-light);
  font-weight: 600;
  margin-bottom: 12px;
}

.archive-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

/* ==========================================================================
   HACKATHON SPOTLIGHT (TROPHY CABINET)
   ========================================================================== */

.hackathon-spotlight-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(99, 102, 241, 0.08) 100%), var(--bg-card);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-xl);
  padding: 40px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px -10px rgba(16, 185, 129, 0.2);
}

.spotlight-trophy-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald-light);
  font-weight: 700;
  font-size: 0.85rem;
  border: 1px solid rgba(16, 185, 129, 0.4);
  margin-bottom: 20px;
}

.hackathon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 22px;
}

.hackathon-mini-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.hackathon-mini-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
}

/* ==========================================================================
   CAREER JOURNEY (20-YEAR DUAL-LAYER TIMELINE)
   ========================================================================== */

.timeline-wrapper {
  position: relative;
  padding-left: 36px;
}

.timeline-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 11px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-indigo) 0%, var(--accent-emerald) 50%, var(--border-subtle) 100%);
}

.timeline-node {
  position: relative;
  margin-bottom: 40px;
}

.timeline-node::before {
  content: '';
  position: absolute;
  top: 6px;
  left: -36px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg-base);
  border: 3px solid var(--accent-indigo);
  box-shadow: 0 0 12px var(--accent-indigo-glow);
  z-index: 1;
}

.timeline-node.emerald::before {
  border-color: var(--accent-emerald);
  box-shadow: 0 0 12px var(--accent-emerald-glow);
}

.timeline-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-normal);
}

.timeline-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-md);
}

.timeline-date-chip {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-indigo-light);
  background: rgba(99, 102, 241, 0.12);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  font-family: ui-monospace, monospace;
}

.timeline-date-chip.emerald {
  color: var(--accent-emerald-light);
  background: rgba(16, 185, 129, 0.12);
}

.timeline-role {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline-company {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 16px;
}

.timeline-bullets {
  list-style: none;
}

.timeline-bullets li {
  position: relative;
  padding-left: 20px;
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 10px;
}

.timeline-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-indigo-light);
  font-size: 1rem;
}

/* Accordion Expander for Prior 2004-2015 Career */
.accordion-toggle-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 28px;
  background: var(--bg-surface-elevated);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: 20px;
}

.accordion-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-indigo);
  border-style: solid;
  transform: translateY(-2px);
  color: var(--accent-indigo-light);
}

.accordion-content {
  display: none;
  margin-top: 32px;
  animation: fadeIn 0.4s ease;
}

.accordion-content.expanded {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   SKILLS MATRIX (BENTO TECH GRID)
   ========================================================================== */

.skills-bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 22px;
}

.skill-category-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition-normal);
}

.skill-category-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.skill-cat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--accent-indigo-glow);
  color: var(--accent-indigo-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.skill-cat-icon.emerald {
  background: var(--accent-emerald-glow);
  color: var(--accent-emerald-light);
}

.skill-cat-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.skill-pills-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-pill {
  font-size: 0.84rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.skill-pill:hover {
  border-color: var(--accent-indigo);
  background: var(--accent-indigo-glow);
  color: #ffffff;
  transform: translateY(-2px);
}

/* ==========================================================================
   EDUCATION & CERTIFICATIONS
   ========================================================================== */

.edu-cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.edu-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 18px;
  transition: all var(--transition-fast);
}

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

.cert-cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.cert-tile {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.cert-tile:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.cert-tile h4 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.35;
}

.cert-issuer-text {
  font-size: 0.82rem;
  color: var(--accent-indigo-light);
  margin-bottom: 14px;
}

.cert-verify-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}

.cert-verify-link:hover {
  color: var(--accent-indigo-light);
}

/* ==========================================================================
   FOOTER & FLOATING TOAST
   ========================================================================== */

.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 44px 0 28px;
  margin-top: 40px;
}

.footer-contact-box {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 32px;
}

.footer-contact-title {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.footer-contact-desc {
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.6;
  margin-bottom: 18px;
}

.footer-btn-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.footer-action-btn.primary {
  background: var(--gradient-tech);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.footer-action-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
  color: #ffffff;
}

.footer-action-btn.ghost {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.footer-action-btn.ghost:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* Floating Toast Notification */
.toast-notice {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--accent-emerald);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(16, 185, 129, 0.2);
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  pointer-events: none;
}

.toast-notice.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLET & MOBILE)
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-actions, .hero-social-links {
    justify-content: center;
  }

  .project-bento-card.col-8,
  .project-bento-card.col-4,
  .project-bento-card.col-6 {
    grid-column: span 12;
  }

  .edu-cert-grid {
    grid-template-columns: 1fr;
  }

  .hero-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 520px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 40px 0;
  }

  .section-header {
    margin-bottom: 24px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    box-shadow: var(--shadow-lg);
  }

  .nav-links.open {
    display: flex;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero-section {
    padding-top: 105px;
    padding-bottom: 60px;
  }

  .hero-avatar-wrapper {
    width: 160px;
    height: 160px;
    margin-bottom: 16px;
  }

  .project-bento-card {
    padding: 24px 20px;
  }

  .archive-projects-grid {
    grid-template-columns: 1fr;
  }

  .hackathon-grid {
    grid-template-columns: 1fr;
  }

  .hackathon-spotlight-card {
    padding: 28px 22px;
  }

  .skills-bento-grid {
    grid-template-columns: 1fr;
  }

  .timeline-wrapper {
    padding-left: 28px;
  }

  .timeline-node::before {
    left: -28px;
    width: 18px;
    height: 18px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .site-container {
    padding: 0 16px;
  }

  .nav-wrapper {
    padding: 12px 16px;
  }

  .nav-brand {
    font-size: 1rem;
  }

  .nav-cta-btn {
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  .nav-cta-btn span {
    display: none;
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .hero-subtitle {
    font-size: 0.98rem;
  }

  .hero-avatar-wrapper {
    width: 140px;
    height: 140px;
    margin-bottom: 14px;
  }

  .hero-metrics-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .project-bento-card {
    padding: 20px 16px;
    border-radius: var(--radius-lg);
  }

  .project-card-title {
    font-size: 1.35rem;
  }

  .project-links-row {
    flex-direction: column;
    align-items: stretch;
  }

  .project-links-row .project-btn {
    justify-content: center;
    width: 100%;
  }

  .archive-filter-bar {
    gap: 6px;
  }

  .filter-btn {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  .hackathon-spotlight-card {
    padding: 22px 16px;
    border-radius: var(--radius-lg);
  }

  .cert-cards-container {
    grid-template-columns: 1fr;
  }

  .accordion-toggle-btn {
    padding: 14px 16px;
    font-size: 0.88rem;
  }

  .toast-notice {
    left: 16px;
    right: 16px;
    bottom: 16px;
    justify-content: center;
    font-size: 0.85rem;
    padding: 10px 16px;
  }
}