/* 
  Le Phuoc Hung — Engineering Portfolio & Dataset Showcase
  Built according to taste-skill anti-slop guidelines:
  - Strict layout discipline (Header clearance, Grid over Flex math, No clipping)
  - Color calibration: Deep Zinc (#0a0e17) + Crisp Slate + Single Emerald Accent
  - Zero AI-purple slop, zero blurry glow spheres, zero fake buzzwords
  - High-density terminal & verified dataset preview
*/

:root {
  --bg: #090d16;
  --bg-subtle: #0f1523;
  --bg-card: #121927;
  --bg-card-hover: #161f30;
  
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 255, 255, 0.18);
  --border-emerald: rgba(16, 185, 129, 0.3);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-emerald: #10b981;
  --accent-emerald-light: #34d399;
  --accent-blue: #38bdf8;
  
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --header-height: 64px;
  --header-bg: rgba(9, 13, 22, 0.85);
  --mobile-nav-bg: rgba(9, 13, 22, 0.98);
  --card-shadow: none;
  --btn-primary-bg: #f8fafc;
  --btn-primary-text: #090d16;
  --btn-primary-hover: #e2e8f0;
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-subtle: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  
  --border: #e2e8f0;
  --border-focus: #cbd5e1;
  --border-emerald: rgba(5, 150, 105, 0.25);
  
  --text-primary: #090d16;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --accent-emerald: #059669;
  --accent-emerald-light: #047857;
  --accent-blue: #0284c7;
  
  --header-bg: rgba(248, 250, 252, 0.9);
  --mobile-nav-bg: rgba(248, 250, 252, 0.98);
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --btn-primary-bg: #090d16;
  --btn-primary-text: #f8fafc;
  --btn-primary-hover: #1e293b;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  overflow-x: hidden;
  width: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Typography Utilities */
.font-mono { font-family: var(--font-mono); }
.text-muted { color: var(--text-muted); }
.text-emerald { color: var(--accent-emerald-light); }
.text-blue { color: var(--accent-blue); }
.text-xs { font-size: 0.75rem; }
.text-truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Container */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Header (Fixed, 64px height, No overlapping hero content)
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.header-inner {
  max-width: 1120px;
  height: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-mark {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background-color: var(--accent-emerald);
}

.logo-text {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Control Group: Theme & Language Switchers */
.control-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  padding: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.45rem;
  border-radius: 0.25rem;
  cursor: pointer;
  line-height: 1;
  transition: all 0.15s ease;
}

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

.lang-btn.active {
  background: var(--bg-subtle);
  color: var(--accent-emerald-light);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .lang-btn.active {
  background: #ffffff;
  color: var(--accent-emerald);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.theme-icon-sun {
  display: none;
  font-size: 0.85rem;
}

.theme-icon-moon {
  display: block;
  font-size: 0.85rem;
}

[data-theme="light"] .theme-icon-sun {
  display: block;
  color: #d97706;
}

[data-theme="light"] .theme-icon-moon {
  display: none;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.4rem 0.6rem;
  border-radius: 0.375rem;
  cursor: pointer;
}

.mobile-nav {
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--mobile-nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.4);
  z-index: 101;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.mobile-nav.hidden {
  display: none;
}

.mobile-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.4rem 0;
}

.mobile-link.highlight {
  color: var(--accent-emerald-light);
  font-weight: 600;
}

.mobile-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  margin-top: 0.5rem;
  border-top: 1px solid var(--border);
}

/* ==========================================================================
   Hero Section (Left Content + Right Terminal, Non-overlapping)
   ========================================================================== */
.hero {
  padding-top: calc(var(--header-height) + 3.5rem);
  padding-bottom: 4rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.75rem;
  background-color: rgba(16, 185, 129, 0.08);
  border: 1px solid var(--border-emerald);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #6ee7b7;
  margin-bottom: 1.25rem;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
}

.hero-headline {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.hero-subtext {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
  max-width: 54ch;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

/* Buttons (Strict WCAG AA Contrast, Single Line, Crisp Border) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.15s ease;
  cursor: pointer;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  border-radius: 0.375rem;
}

.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: 1px solid var(--btn-primary-bg);
}

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

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

.btn-secondary:hover {
  background-color: var(--bg-card);
  border-color: var(--border-focus);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-muted);
  border: 1px dashed var(--border);
}

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

/* Hero Metrics Strip (Clean, Authentic, Monospace) */
.hero-metrics {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.metric-cell {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.metric-lbl {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.metric-divider {
  width: 1px;
  height: 28px;
  background-color: var(--border);
}

/* ==========================================================================
   Terminal Window (Hero Right)
   ========================================================================== */
.terminal-card {
  background-color: #0d121d;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 16px 36px -12px rgba(0, 0, 0, 0.5);
}

.terminal-bar {
  background-color: #121824;
  padding: 0.6rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.window-dots {
  display: flex;
  gap: 0.35rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.red { background-color: #ef4444; }
.dot.yellow { background-color: #f59e0b; }
.dot.green { background-color: #10b981; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 1.25rem;
  font-size: 0.78rem;
  line-height: 1.7;
}

.term-line {
  margin-bottom: 0.35rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.term-prompt {
  color: var(--accent-emerald);
  margin-right: 0.4rem;
}

.term-cursor {
  color: var(--accent-emerald);
  animation: blink 1.2s infinite;
  margin-top: 0.5rem;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.terminal-footer {
  background-color: #0b0f18;
  padding: 0.6rem 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1rem;
}

.footer-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* ==========================================================================
   Sections Common
   ========================================================================== */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border);
}

.section-title-wrap {
  margin-bottom: 2.5rem;
}

.section-heading {
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 60ch;
}

/* ==========================================================================
   Datasets Grid & Table Previews (Real Artifacts)
   ========================================================================== */
.datasets-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.dataset-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--card-shadow);
  transition: border-color 0.15s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.dataset-card:hover {
  border-color: var(--border-focus);
}

.dataset-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.badge-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
  border-radius: 0.25rem;
  color: var(--text-secondary);
}

.badge-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 0.25rem;
  background-color: rgba(56, 189, 248, 0.1);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.badge-status.approved {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald-light);
  border-color: var(--border-emerald);
}

.dataset-name {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
  line-height: 1.25;
}

.dataset-summary {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

/* Embedded Table Preview */
.dataset-table-preview {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  padding: 0.6rem;
  margin-bottom: 1.25rem;
  font-size: 0.75rem;
}

.table-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

.table-row:last-child {
  border-bottom: none;
}

.table-header {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
}

.text-mono {
  font-family: var(--font-mono);
}

.table-preview-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.45rem 0.5rem 0.15rem;
  margin-top: 0.35rem;
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

.table-preview-footer .preview-tag {
  color: var(--accent-emerald-light);
  font-weight: 500;
}

.dataset-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.meta-item {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  color: var(--text-secondary);
}

.meta-item strong {
  color: var(--text-primary);
}

.dataset-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* ==========================================================================
   Architecture & Pipeline
   ========================================================================== */
.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.pipeline-step {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.75rem;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-emerald);
  margin-bottom: 0.75rem;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.step-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.step-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.step-chips span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 0.15rem 0.45rem;
  border-radius: 0.2rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Technical Stack
   ========================================================================== */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.stack-col {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.75rem;
  box-shadow: var(--card-shadow);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.stack-cat {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.stack-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stack-list li {
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.stack-list li strong {
  color: var(--text-primary);
}

/* ==========================================================================
   Track Record / Timeline
   ========================================================================== */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.timeline-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  padding: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  box-shadow: var(--card-shadow);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--accent-emerald);
  font-weight: 600;
}

.timeline-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald-light);
  border: 1px solid var(--border-emerald);
  padding: 0.15rem 0.4rem;
  border-radius: 0.2rem;
  width: fit-content;
}

.timeline-heading {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.timeline-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Contact & Commercial Section
   ========================================================================== */
.contact-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 3rem 2.5rem;
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-heading {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

.contact-sub {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
  text-align: left;
}

.contact-tile {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  position: relative;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.tile-lbl {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tile-val {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}

.copy-pill {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.2rem 0.45rem;
  border-radius: 0.2rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.copy-pill:hover {
  color: var(--text-primary);
  background-color: var(--bg-subtle);
  border-color: var(--border-focus);
}

.badge-emerald {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent-emerald-light);
}

.badge-neutral {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.contact-cta {
  display: flex;
  justify-content: center;
}

.legal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 2.25rem;
  margin-bottom: 3rem;
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .legal-card {
    padding: 1.25rem 1rem;
    font-size: 0.875rem;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.825rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* Light Theme Specific Component Refinements */
[data-theme="light"] .status-pill {
  background-color: rgba(5, 150, 105, 0.08);
  border-color: rgba(5, 150, 105, 0.25);
  color: var(--accent-emerald);
}

[data-theme="light"] .badge-status.approved {
  background-color: rgba(5, 150, 105, 0.1);
  color: var(--accent-emerald);
  border-color: rgba(5, 150, 105, 0.25);
}

[data-theme="light"] .badge-status {
  background-color: rgba(2, 132, 199, 0.08);
  color: #0284c7;
  border-color: rgba(2, 132, 199, 0.2);
}

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

[data-theme="light"] .badge-neutral {
  background-color: #f1f5f9;
  border-color: #e2e8f0;
  color: #475569;
}

[data-theme="light"] .timeline-badge {
  background-color: rgba(5, 150, 105, 0.08);
  border-color: rgba(5, 150, 105, 0.25);
  color: var(--accent-emerald);
}

[data-theme="light"] .table-preview-footer .preview-tag {
  color: var(--accent-emerald);
}

/* ==========================================================================
   Responsive Breakpoints (Declared explicitly as per taste-skill)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .pipeline-grid, .stack-grid {
    grid-template-columns: 1fr;
  }
  
  .datasets-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .nav {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero {
    padding-top: calc(var(--header-height) + 2rem);
    padding-bottom: 3rem;
    gap: 2rem;
  }

  .hero-headline {
    font-size: 2rem;
    line-height: 1.22;
  }

  .hero-subtext {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    justify-content: center;
    padding: 0.75rem 1rem;
  }
  
  .hero-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem 1rem;
    padding-top: 1.25rem;
  }
  
  .metric-divider {
    display: none;
  }

  .status-pill {
    font-size: 0.72rem;
    padding: 0.3rem 0.65rem;
    white-space: normal;
    line-height: 1.35;
  }

  .terminal-card {
    max-width: 100%;
  }

  .terminal-body {
    padding: 1rem;
    font-size: 0.72rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .term-line {
    white-space: pre-wrap;
    word-break: break-word;
    overflow: visible;
    text-overflow: clip;
  }

  .terminal-footer {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0.85rem;
  }

  /* Dataset Cards & Mobile-friendly Table */
  .dataset-card {
    padding: 1.25rem 1rem;
    border-radius: 0.5rem;
  }

  .dataset-top {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .dataset-name {
    font-size: 1.2rem;
    line-height: 1.3;
  }

  .dataset-summary {
    font-size: 0.825rem;
    line-height: 1.55;
    margin-bottom: 1rem;
  }

  .dataset-table-preview {
    padding: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 1rem;
    border-radius: 0.375rem;
  }

  .table-row {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 0.4rem;
    min-width: 380px;
    font-size: 0.72rem;
    padding: 0.4rem 0.35rem;
  }

  .table-preview-footer {
    min-width: 380px;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    font-size: 0.65rem;
    padding-top: 0.4rem;
  }

  .dataset-meta {
    gap: 0.4rem;
    margin-bottom: 1rem;
  }

  .meta-item {
    font-size: 0.68rem;
    padding: 0.25rem 0.5rem;
  }

  .dataset-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .dataset-actions .btn-sm {
    width: 100%;
    justify-content: center;
    padding: 0.65rem 1rem;
  }

  .dataset-actions span {
    text-align: center;
  }

  /* Architecture & Pipeline */
  .pipeline-step {
    padding: 1.5rem 1.25rem;
  }

  .stack-col {
    padding: 1.25rem;
  }
  
  .timeline-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
  }

  /* Contact & Footer */
  .contact-box {
    padding: 2rem 1.25rem;
  }

  .contact-heading {
    font-size: 1.45rem;
    line-height: 1.3;
  }

  .contact-sub {
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
  }

  .contact-tile {
    padding: 1rem;
  }

  .tile-val {
    font-size: 0.8rem;
    word-break: break-all;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 1.25rem;
    padding: 0 1rem;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.85rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 1rem;
  }

  .header-actions .btn-sm {
    display: none;
  }

  .hero-headline {
    font-size: 1.65rem;
  }

  .section-heading {
    font-size: 1.35rem;
  }

  .section-desc {
    font-size: 0.825rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }
}

/* ==========================================================================
   Print Stylesheet (Instant Clean PDF CV on Cmd + P)
   ========================================================================== */
@media print {
  body {
    background: #ffffff !important;
    color: #111827 !important;
    font-size: 10pt;
  }
  
  .header, .hero-cta-group, .hero-aside, .footer, .contact-section, .copy-pill {
    display: none !important;
  }
  
  .hero {
    padding-top: 0 !important;
    border-bottom: 2px solid #000 !important;
  }
  
  .hero-headline {
    color: #000 !important;
    font-size: 22pt !important;
  }
  
  .hero-subtext {
    color: #374151 !important;
  }
  
  .dataset-card, .pipeline-step, .stack-col, .timeline-row, .dataset-table-preview {
    background: #ffffff !important;
    border: 1px solid #d1d5db !important;
    color: #111827 !important;
  }
  
  .section {
    padding: 2rem 0 !important;
  }
}