/* ==========================================================================
   AI-Lab Portal - Modern Design System (Cloudflare Pages)
   ========================================================================== */

:root {
  /* Color Palette (Dark Theme Default) */
  --bg-base: #07090e;
  --bg-surface: #0e131f;
  --bg-card: rgba(16, 23, 38, 0.75);
  --bg-card-hover: rgba(23, 33, 54, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(6, 182, 212, 0.3);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  --accent-indigo: #6366f1;
  --accent-indigo-glow: rgba(99, 102, 241, 0.25);
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(6, 182, 212, 0.15);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(6, 182, 212, 0.4);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(6, 182, 212, 0.2);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Ambient Background Glows */
.ambient-glow {
  position: fixed;
  width: 550px;
  height: 550px;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
  transition: opacity var(--transition-normal);
}

.glow-1 {
  top: -120px;
  left: 10%;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
}

.glow-2 {
  top: 30%;
  right: 5%;
  background: radial-gradient(circle, var(--accent-indigo-glow) 0%, transparent 70%);
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(7, 9, 14, 0.7);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal);
}

[data-theme="light"] .navbar {
  background: rgba(248, 250, 252, 0.8);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px var(--accent-cyan-glow);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.25);
  margin-left: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.live-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: var(--accent-emerald);
  font-size: 0.8rem;
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

/* Hero Section */
.hero-section {
  position: relative;
  z-index: 1;
  padding: 5.5rem 1.5rem 4rem;
  text-align: center;
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #a5b4fc;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.75rem;
  backdrop-filter: blur(8px);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 18px var(--accent-cyan-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.35);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  max-width: 850px;
  margin: 0 auto;
}

.stat-card {
  padding: 1.25rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 0.25rem;
}

/* Sections */
.section {
  position: relative;
  z-index: 1;
  padding: 4.5rem 1.5rem;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-subtitle {
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.service-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 1.75rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.card-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.card-icon-wrapper.cyan {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.card-icon-wrapper.indigo {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-indigo);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.card-icon-wrapper.emerald {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.card-icon-wrapper.amber {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
}

.status-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.status-badge.live {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.card-link {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-cyan);
}

/* Terminal Card */
.terminal-card {
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  background: #0d1117;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: #161b22;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.terminal-tabs {
  display: flex;
  gap: 0.5rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: #8b949e;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: #f0f6fc;
}

.tab-btn.active {
  background: #21262d;
  color: #58a6ff;
  font-weight: 600;
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: #21262d;
  border: 1px solid #30363d;
  color: #c9d1d9;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: #30363d;
  color: #fff;
}

.terminal-body {
  padding: 1.5rem;
  overflow-x: auto;
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #e6edf3;
  line-height: 1.6;
  white-space: pre;
}

/* Nodes Table */
.nodes-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  overflow-x: auto;
  box-shadow: var(--shadow-card);
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.nodes-table th, .nodes-table td {
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.nodes-table th {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  background: rgba(0, 0, 0, 0.15);
}

.nodes-table tbody tr:last-child td {
  border-bottom: none;
}

.nodes-table tbody tr:hover {
  background: var(--border-subtle);
}

.nodes-table code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
}

/* Status Banner */
.status-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(6, 182, 212, 0.08));
  border: 1px solid rgba(16, 185, 129, 0.25);
  backdrop-filter: blur(16px);
}

.status-banner-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.status-indicator-ring {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.ring-core {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-emerald);
}

.status-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.status-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.ping-box {
  text-align: right;
}

.ping-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.ping-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-emerald);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 1.5rem;
  background: var(--bg-base);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 0.75rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-cyan);
}

/* Responsiveness */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .cards-grid { grid-template-columns: 1fr; }
  .hero-cta-group { flex-direction: column; }
  .status-banner { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .ping-box { text-align: left; }
  .footer-container { flex-direction: column; gap: 1rem; text-align: center; }
}