:root {
  --bg-primary: #070b14;
  --bg-secondary: #0d1424;
  --bg-card: #111a30;
  --bg-card-hover: #16223f;
  --bg-glass: rgba(13, 20, 36, 0.75);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.25);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-cyan: #00f2fe;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-crimson: #ef4444;
  --accent-gradient: linear-gradient(135deg, #00f2fe 0%, #3b82f6 100%);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 24px rgba(0, 242, 254, 0.15);
}

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

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

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(0, 242, 254, 0.07) 0%, transparent 50%),
    radial-gradient(circle at 100% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.25rem; font-weight: 600; }

p {
  color: var(--text-muted);
  font-size: 1rem;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition-smooth);
}

a:hover {
  color: #70f7ff;
}

code, pre {
  font-family: var(--font-mono);
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-alt {
  background-color: rgba(13, 20, 36, 0.6);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Glass Card */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
}

.glass-panel:hover {
  border-color: rgba(0, 242, 254, 0.2);
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-logo {
  width: 34px;
  height: 34px;
  background: var(--accent-gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #070b14;
  font-weight: 800;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-left: 1px solid var(--border-color);
  padding-left: 0.6rem;
  margin-left: 0.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-item a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
}

.nav-item a:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}

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

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #070b14;
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
  color: #070b14;
  box-shadow: 0 0 24px rgba(0, 242, 254, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-main);
}

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

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

.btn-viva {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(59, 130, 246, 0.15) 100%);
  border-color: rgba(16, 185, 129, 0.35);
  color: #34d399;
}

.btn-viva:hover {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.25) 0%, rgba(59, 130, 246, 0.25) 100%);
  border-color: rgba(16, 185, 129, 0.6);
  color: #6ee7b7;
  transform: translateY(-1px);
}

/* Hero Section */
.hero-section {
  padding: 4rem 0 3rem 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1.15fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-title {
  font-weight: 800;
  line-height: 1.15;
}

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

.hero-subtitle {
  font-size: 1.15rem;
  color: #cbd5e1;
  font-weight: 400;
  line-height: 1.5;
}

.simulation-disclaimer-box {
  display: flex;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: #fca5a5;
  line-height: 1.45;
}

.simulation-disclaimer-box .icon {
  color: var(--accent-crimson);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.5rem;
}

.hero-quick-specs {
  display: flex;
  gap: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-val {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.spec-lbl {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 3D Simulation Hero Card */
.sim-card {
  position: relative;
  background: #080d1a;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), var(--shadow-glow);
}

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: rgba(13, 20, 36, 0.95);
  border-bottom: 1px solid var(--border-color);
}

.sim-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.sim-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.sim-canvas-wrap {
  width: 100%;
  height: 380px;
  position: relative;
  background: #040810;
}

#hero-sim-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.sim-hud-overlay {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  pointer-events: none;
}

.hud-chip {
  background: rgba(7, 11, 20, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #94a3b8;
}

.hud-chip span {
  color: var(--text-main);
  font-weight: 600;
}

.sim-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: rgba(13, 20, 36, 0.95);
  border-top: 1px solid var(--border-color);
  gap: 1rem;
}

.sim-btn-group {
  display: flex;
  gap: 0.5rem;
}

.sim-scrub {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  max-width: 260px;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.sim-scrub input[type="range"] {
  flex: 1;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

.sim-footer-note {
  padding: 0.5rem 1.25rem;
  background: rgba(7, 11, 20, 0.6);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-align: center;
}

/* 2 Minute Cards Section */
.two-minute-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.step-card {
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  border-top: 2px solid transparent;
}

.step-card:hover {
  transform: translateY(-3px);
  border-top-color: var(--accent-cyan);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.step-title {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}

.step-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* What is ARL & Flow */
.loop-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2.5rem 0;
  padding: 1.5rem;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.loop-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  min-width: 100px;
  text-align: center;
}

.loop-node .node-icon {
  font-size: 1.4rem;
}

.loop-node .node-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.loop-arrow {
  color: var(--accent-cyan);
  font-size: 1.2rem;
  opacity: 0.6;
}

/* Accordion */
.tech-details-box {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  margin-top: 1.5rem;
}

.accordion-header {
  width: 100%;
  padding: 1rem 1.25rem;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.accordion-header:hover {
  background: rgba(255, 255, 255, 0.02);
}

.accordion-content {
  display: none;
  padding: 1.25rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

/* Architecture Diagram */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.arch-col {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.arch-col-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  color: var(--accent-cyan);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.arch-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.arch-list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.arch-list li::before {
  content: "•";
  color: var(--accent-blue);
  font-weight: bold;
}

/* Environment Cards */
.env-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.env-card {
  padding: 1.75rem;
}

.env-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.env-card-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.2);
}

.obs-breakdown-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.obs-breakdown-table th, .obs-breakdown-table td {
  padding: 0.45rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.obs-breakdown-table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.obs-breakdown-table td:first-child {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.obs-breakdown-table tr.total-row {
  font-weight: 700;
  color: var(--text-main);
  border-top: 1px solid var(--border-color);
}

/* Interactive LiDAR Section */
.lidar-section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.lidar-canvas-container {
  width: 100%;
  height: 380px;
  background: #040812;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

#lidar-2d-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.lidar-telemetry-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lidar-ray-readouts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.ray-badge {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  display: flex;
  flex-direction: column;
}

.ray-label {
  color: var(--text-dim);
  font-size: 0.65rem;
}

.ray-val {
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Results & Benchmarks */
.benchmark-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.benchmark-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.chart-wrapper {
  position: relative;
  height: 260px;
  width: 100%;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.data-table th, .data-table td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  color: var(--text-dim);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* GUI & Streamlit Section */
.gui-tabs-preview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.gui-tab-card {
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.gui-tab-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.gui-tab-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.gui-tab-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Terminal & Code Blocks */
.code-box {
  background: #040810;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 1rem 0;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
}

.code-lang {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}

.code-box pre {
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  color: #e2e8f0;
  line-height: 1.5;
}

/* Quick Start Cards */
.workflow-steps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.workflow-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.wf-step-idx {
  width: 32px;
  height: 32px;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: 50%;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  flex-shrink: 0;
}

.wf-step-content {
  flex: 1;
}

.wf-step-content h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.wf-step-content p {
  font-size: 0.85rem;
}

/* Limitations & Roadmap */
.limits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.limit-item {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.limit-item .icon {
  color: var(--accent-amber);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.roadmap-item {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.roadmap-item .icon {
  color: var(--accent-blue);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

/* Tech Badges */
.tech-badges-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.tech-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
}

.tech-badge span {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

/* Footer */
.site-footer {
  padding: 4rem 0 2rem 0;
  background: #04070e;
  border-top: 1px solid var(--border-color);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-brand {
  max-width: 360px;
}

.footer-links-group {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col ul a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-col ul a:hover {
  color: var(--text-main);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* College Presentation Mode Modal */
.presentation-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(4, 7, 14, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  flex-direction: column;
}

.presentation-modal.active {
  display: flex;
}

.pres-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(13, 20, 36, 0.8);
}

.pres-progress {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
}

.pres-controls-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pres-body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-y: auto;
}

.pres-slide {
  display: none;
  max-width: 900px;
  width: 100%;
  animation: slideFade 0.3s ease;
}

.pres-slide.active {
  display: block;
}

@keyframes slideFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.pres-slide-header {
  margin-bottom: 1.5rem;
}

.pres-slide-tag {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.pres-slide-title {
  font-size: 2.2rem;
  margin-top: 0.25rem;
}

.pres-slide-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.pres-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border-color);
  background: rgba(13, 20, 36, 0.8);
}

.pres-nav-keys {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .arch-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .lidar-section-grid {
    grid-template-columns: 1fr;
  }
  .benchmark-grid {
    grid-template-columns: 1fr;
  }
  .limits-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .arch-grid {
    grid-template-columns: 1fr;
  }
  .hero-quick-specs {
    flex-wrap: wrap;
    gap: 1rem;
  }
}