/* ========================================
   JANUS LANGUAGE WEBSITE - THEME SYSTEM
   HMPL.js + PicoCSS + Vite (CDN version)
   ======================================== */

/* CSS Custom Properties for theming */
:root {
  /* Light Mode - Tablet Optimized, Study-Friendly */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-code: #1e293b;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-tertiary: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --border: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.08);
  --glow: rgba(99, 102, 241, 0.3);
  
  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* OLED Dark Mode - Pure Black Optimization */
[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0f;
  --bg-tertiary: #12121a;
  --bg-code: #0d0d12;
  --text-primary: #f8fafc;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-primary: #818cf8;
  --accent-secondary: #a78bfa;
  --accent-tertiary: #22d3ee;
  --success: #34d399;
  --warning: #fbbf24;
  --error: #f87171;
  --border: #27272a;
  --shadow: rgba(0, 0, 0, 0.5);
  --glow: rgba(129, 140, 248, 0.4);
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition-base), color var(--transition-base);
}

/* Typography */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; margin-bottom: var(--space-md); }
h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p { margin-bottom: var(--space-md); color: var(--text-secondary); }

a { color: var(--accent-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-secondary); }

code, pre { font-family: var(--font-mono); font-size: 0.9em; }
code { background: var(--bg-tertiary); padding: 0.2em 0.4em; border-radius: 4px; color: var(--accent-primary); }
pre { background: var(--bg-code); padding: var(--space-lg); border-radius: 12px; overflow-x: auto; margin: var(--space-lg) 0; }
pre code { background: transparent; padding: 0; color: inherit; }

/* Utilities */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-lg); }
.text-center { text-align: center; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg); border-radius: 8px;
  font-weight: 600; font-size: 0.95rem; cursor: pointer;
  transition: all var(--transition-fast); border: 2px solid transparent;
  text-decoration: none;
}
.btn-primary { background: var(--accent-primary); color: white; }
.btn-primary:hover { background: var(--accent-secondary); transform: translateY(-2px); box-shadow: 0 4px 20px var(--glow); color: white; }
.btn-secondary { background: transparent; border-color: var(--border); color: var(--text-primary); }
.btn-secondary:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
.btn-lg { padding: var(--space-md) var(--space-xl); font-size: 1rem; }

/* Tags */
.tag {
  display: inline-flex; align-items: center; gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm); border-radius: 20px;
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
}
.tag-info { background: rgba(99, 102, 241, 0.15); color: var(--accent-primary); }
.tag-success { background: rgba(16, 185, 129, 0.15); color: var(--success); }

/* Cards */
.card {
  background: var(--bg-secondary); border-radius: 16px; padding: var(--space-xl);
  border: 1px solid var(--border); transition: all var(--transition-base);
}
.card:hover { border-color: var(--accent-primary); transform: translateY(-4px); box-shadow: 0 20px 40px var(--shadow); }

/* Header */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: var(--space-md) 0; transition: all var(--transition-base); background: transparent;
}
header.scrolled {
  background: rgba(255, 255, 255, 0.8); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border);
  padding: var(--space-sm) 0;
}
[data-theme="dark"] header.scrolled { background: rgba(0, 0, 0, 0.8); }

.header-content { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: var(--space-sm); font-weight: 700; font-size: 1.5rem; color: var(--text-primary); }
.logo-icon { width: 32px; height: 32px; color: var(--accent-primary); }

nav { display: flex; align-items: center; gap: var(--space-lg); }
.nav-link { color: var(--text-secondary); font-weight: 500; font-size: 0.9rem; position: relative; padding: var(--space-xs) 0; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--accent-primary); transition: width var(--transition-fast); }
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { width: 100%; }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: var(--space-sm); background: none; border: none; cursor: pointer; }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--text-primary); transition: all var(--transition-fast); }

/* Theme Toggle */
.theme-toggle {
  position: fixed; bottom: var(--space-lg); right: var(--space-lg); z-index: 1000;
  width: 48px; height: 48px; border-radius: 50%; background: var(--bg-secondary);
  border: 1px solid var(--border); color: var(--text-primary); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition-base); box-shadow: 0 4px 20px var(--shadow);
}
.theme-toggle:hover { transform: scale(1.1); border-color: var(--accent-primary); box-shadow: 0 4px 30px var(--glow); }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: 80px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.gradient-orb { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.4; animation: float 8s ease-in-out infinite; }
.orb-1 { width: 600px; height: 600px; background: var(--accent-primary); top: -200px; right: -200px; }
.orb-2 { width: 400px; height: 400px; background: var(--accent-secondary); bottom: -100px; left: -100px; animation-delay: -3s; }
.orb-3 { width: 300px; height: 300px; background: var(--accent-tertiary); top: 50%; left: 30%; animation-delay: -5s; opacity: 0.2; }
[data-theme="dark"] .gradient-orb { opacity: 0.15; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3xl); align-items: center; position: relative; z-index: 1; }

.badge { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-lg); }
.badge-text { font-size: 0.85rem; color: var(--text-muted); }

h1 { margin-bottom: var(--space-lg); }
.title-line { display: block; font-size: clamp(3rem, 8vw, 5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.title-sub { display: block; font-size: clamp(1.5rem, 4vw, 2.5rem); font-weight: 300; color: var(--text-secondary); margin-top: var(--space-sm); }

.hero-description { font-size: 1.15rem; max-width: 500px; margin-bottom: var(--space-xl); color: var(--text-secondary); line-height: 1.7; }
.hero-cta { display: flex; gap: var(--space-md); margin-bottom: var(--space-2xl); }

.hero-stats { display: flex; gap: var(--space-2xl); }
.stat { display: flex; flex-direction: column; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--accent-primary); line-height: 1; }
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: var(--space-xs); }

.code-window { background: var(--bg-code); border-radius: 16px; overflow: hidden; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5); border: 1px solid rgba(255, 255, 255, 0.1); max-width: 100%; }
.code-header { display: flex; align-items: center; gap: var(--space-md); padding: var(--space-md) var(--space-lg); background: rgba(255, 255, 255, 0.05); border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.code-dots { display: flex; gap: 6px; flex-shrink: 0; }
.code-dots span { width: 12px; height: 12px; border-radius: 50%; }
.code-dots span:nth-child(1) { background: #ff5f56; }
.code-dots span:nth-child(2) { background: #ffbd2e; }
.code-dots span:nth-child(3) { background: #27c93f; }
.code-title { font-size: 0.8rem; color: rgba(255, 255, 255, 0.5); font-family: var(--font-mono); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.code-content { padding: var(--space-lg); margin: 0; font-size: 0.85rem; line-height: 1.8; color: #e2e8f0; overflow-x: auto; max-width: 100%; white-space: pre; }

/* Sections */
section { padding: var(--space-3xl) 0; }
.section-header { text-align: center; margin-bottom: var(--space-3xl); }
.section-header h2 { margin-bottom: var(--space-sm); }
.section-header p { max-width: 600px; margin: 0 auto; }

/* Comparison */
.comparison { background: var(--bg-secondary); }
.comparison-tabs { margin-bottom: var(--space-3xl); }
.tabs { display: flex; gap: var(--space-xs); margin-bottom: var(--space-xl); flex-wrap: wrap; justify-content: center; }
.tab { padding: var(--space-sm) var(--space-md); border-radius: 8px; border: none; background: transparent; color: var(--text-muted); font-weight: 500; cursor: pointer; transition: all var(--transition-fast); white-space: nowrap; }
.tab:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.tab.active { color: var(--accent-primary); background: rgba(99, 102, 241, 0.1); }

.tab-content { background: var(--bg-primary); border-radius: 16px; padding: var(--space-xl); border: 1px solid var(--border); }
.comparison-description { text-align: center; margin-bottom: var(--space-xl); }
.comparison-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.comparison-table th, .comparison-table td { padding: var(--space-md); text-align: left; border-bottom: 1px solid var(--border); }
.comparison-table th { font-weight: 600; color: var(--text-muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
.janus-col { color: var(--accent-primary); font-weight: 500; }
.check { color: var(--success); font-weight: 700; }
.cross { color: var(--error); font-weight: 700; }

.points-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); margin-top: var(--space-xl); }
.point-card { background: var(--bg-primary); border-radius: 16px; padding: var(--space-xl); border: 1px solid var(--border); transition: all var(--transition-base); }
.point-card:hover { border-color: var(--accent-primary); transform: translateY(-4px); box-shadow: 0 20px 40px var(--shadow); }
.point-icon { width: 48px; height: 48px; border-radius: 12px; background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); display: flex; align-items: center; justify-content: center; color: white; margin-bottom: var(--space-md); }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.feature-icon { width: 48px; height: 48px; border-radius: 12px; background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); display: flex; align-items: center; justify-content: center; color: white; margin-bottom: var(--space-md); }
.feature-tags { display: flex; gap: var(--space-xs); flex-wrap: wrap; margin-top: var(--space-md); }

/* Playground */
.playground { background: var(--bg-secondary); }
.playground-container { display: grid; grid-template-columns: 220px 1fr; gap: var(--space-lg); background: var(--bg-primary); border-radius: 16px; border: 1px solid var(--border); overflow: hidden; }
.playground-sidebar { background: var(--bg-tertiary); padding: var(--space-lg); border-right: 1px solid var(--border); }
.playground-sidebar h3 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: var(--space-md); }
.example-list { display: flex; flex-direction: column; gap: var(--space-xs); margin-bottom: var(--space-lg); }
.example-btn { padding: var(--space-sm) var(--space-md); border-radius: 8px; border: none; background: transparent; color: var(--text-secondary); text-align: left; font-size: 0.9rem; cursor: pointer; transition: all var(--transition-fast); }
.example-btn:hover { background: var(--bg-secondary); color: var(--text-primary); }
.example-btn.active { background: var(--accent-primary); color: white; }
.run-btn { width: 100%; padding: var(--space-md); border-radius: 8px; border: none; background: var(--success); color: white; font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: var(--space-sm); transition: all var(--transition-fast); }
.run-btn:hover:not(:disabled) { background: #059669; transform: translateY(-2px); }
.run-btn:disabled { opacity: 0.7; cursor: not-allowed; }
.spinner { width: 16px; height: 16px; border: 2px solid transparent; border-top-color: white; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.playground-main { display: grid; grid-template-rows: 2fr 1fr; min-height: 500px; }
.code-panel { border-bottom: 1px solid var(--border); }
.panel-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-sm) var(--space-md); background: var(--bg-tertiary); border-bottom: 1px solid var(--border); }
.panel-title { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); }
.code-editor { margin: 0; padding: var(--space-md); background: var(--bg-code); color: #e2e8f0; font-size: 0.85rem; line-height: 1.7; overflow: auto; height: calc(100% - 41px); }
.output-content { padding: var(--space-md); height: calc(100% - 41px); overflow: auto; font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.6; }
.output-placeholder { color: var(--text-muted); font-style: italic; }
.clear-btn { padding: var(--space-xs) var(--space-sm); border-radius: 4px; border: none; background: transparent; color: var(--text-muted); font-size: 0.75rem; cursor: pointer; }
.clear-btn:hover { color: var(--text-primary); background: var(--bg-tertiary); }

/* Profiles */
.profile-tabs { display: flex; gap: var(--space-md); margin-bottom: var(--space-xl); justify-content: center; }
.profile-tab { display: flex; align-items: center; gap: var(--space-md); padding: var(--space-md) var(--space-lg); border-radius: 12px; border: 2px solid var(--border); background: var(--bg-secondary); cursor: pointer; transition: all var(--transition-base); min-width: 200px; }
.profile-tab:hover { border-color: var(--accent-primary); transform: translateY(-2px); }
.profile-tab.active { border-color: var(--accent-primary); background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1)); }
.tab-icon { width: 40px; height: 40px; border-radius: 10px; background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); display: flex; align-items: center; justify-content: center; color: white; flex-shrink: 0; }
.tab-name { font-family: var(--font-mono); font-size: 0.9rem; font-weight: 600; color: var(--accent-primary); }
.tab-title { font-size: 0.8rem; color: var(--text-muted); }

.profile-content { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); background: var(--bg-secondary); border-radius: 16px; border: 1px solid var(--border); overflow: hidden; }
.profile-info { padding: var(--space-xl); }
.profile-description { font-size: 1rem; margin-bottom: var(--space-xl); color: var(--text-secondary); }
.feature-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-sm); }
.feature-list li { display: flex; align-items: center; gap: var(--space-sm); font-size: 0.95rem; color: var(--text-secondary); }
.use-case-tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.profile-code { background: var(--bg-code); }
.code-filename { font-size: 0.8rem; color: rgba(255, 255, 255, 0.5); font-family: var(--font-mono); }
.code-block { margin: 0; padding: var(--space-lg); font-size: 0.85rem; line-height: 1.8; color: #e2e8f0; overflow-x: auto; }

/* Async Demo */
.async-demo { background: var(--bg-secondary); }
.demo-container { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
.demo-visual { background: var(--bg-primary); border-radius: 16px; border: 1px solid var(--border); overflow: hidden; display: flex; flex-direction: column; }
.visual-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-md) var(--space-lg); background: var(--bg-tertiary); border-bottom: 1px solid var(--border); }
.play-btn { width: 36px; height: 36px; border-radius: 8px; border: none; background: var(--accent-primary); color: white; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all var(--transition-fast); }
.play-btn:hover { background: var(--accent-secondary); transform: scale(1.05); }
.visual-stage { flex: 1; display: flex; align-items: center; justify-content: center; padding: var(--space-xl); min-height: 300px; }
.nursery-box { position: relative; width: 100%; max-width: 300px; padding: var(--space-lg); border: 2px dashed var(--border); border-radius: 16px; background: var(--bg-secondary); transition: all var(--transition-base); }
.nursery-box.active { border-color: var(--accent-primary); border-style: solid; background: rgba(99, 102, 241, 0.05); }
.nursery-label { position: absolute; top: -10px; left: var(--space-md); padding: 0 var(--space-sm); background: var(--bg-primary); font-size: 0.75rem; color: var(--accent-primary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.parent-task { display: flex; align-items: center; gap: var(--space-sm); padding: var(--space-md); margin-bottom: var(--space-md); border-radius: 8px; background: var(--bg-tertiary); transition: all var(--transition-base); }
.parent-task.active { background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); color: white; }
.child-tasks { display: flex; flex-direction: column; gap: var(--space-sm); }
.child-task { display: flex; align-items: center; gap: var(--space-sm); padding: var(--space-md); border-radius: 8px; background: var(--bg-tertiary); opacity: 0.3; transform: translateX(-20px); transition: all var(--transition-base); }
.child-task.active { opacity: 1; transform: translateX(0); }
.task-icon { width: 28px; height: 28px; border-radius: 6px; background: rgba(255, 255, 255, 0.2); display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 700; }

.step-indicators { display: flex; justify-content: center; gap: var(--space-sm); padding: var(--space-md); border-top: 1px solid var(--border); }
.step-dot { width: 10px; height: 10px; border-radius: 50%; border: none; background: var(--border); cursor: pointer; transition: all var(--transition-fast); }
.step-dot.active { background: var(--accent-primary); transform: scale(1.2); }
.step-dot.completed { background: var(--success); }

.step-description { padding: var(--space-md) var(--space-lg); font-size: 0.95rem; color: var(--text-secondary); border-bottom: 1px solid var(--border); }
.code-display { margin: 0; padding: var(--space-lg); background: var(--bg-code); color: #e2e8f0; font-size: 0.85rem; line-height: 1.8; overflow-x: auto; }
.step-counter { font-size: 0.8rem; color: var(--text-muted); }

.key-points { background: var(--bg-primary); border-radius: 16px; border: 1px solid var(--border); padding: var(--space-lg); }
.key-points h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: var(--space-md); }
.key-points ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-sm); }
.key-points li { display: flex; align-items: center; gap: var(--space-sm); font-size: 0.9rem; color: var(--text-muted); transition: all var(--transition-fast); }
.key-points li.active { color: var(--text-primary); }
.key-points li::before { content: '○'; color: var(--border); transition: all var(--transition-fast); }
.key-points li.active::before { content: '●'; color: var(--success); }

/* Examples */
.category-tabs { display: flex; gap: var(--space-xs); margin-bottom: var(--space-xl); flex-wrap: wrap; justify-content: center; }
.category-tab { padding: var(--space-sm) var(--space-lg); border-radius: 8px; border: none; background: var(--bg-secondary); color: var(--text-secondary); font-weight: 500; cursor: pointer; transition: all var(--transition-fast); }
.category-tab:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.category-tab.active { background: var(--accent-primary); color: white; }

.examples-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: var(--space-lg); }
.example-card { background: var(--bg-secondary); border-radius: 12px; border: 1px solid var(--border); overflow: hidden; transition: all var(--transition-base); }
.example-card:hover { border-color: var(--accent-primary); transform: translateY(-4px); box-shadow: 0 20px 40px var(--shadow); }
.example-header { padding: var(--space-md) var(--space-lg); background: var(--bg-tertiary); border-bottom: 1px solid var(--border); }
.example-code { margin: 0; padding: var(--space-md) var(--space-lg); background: var(--bg-code); color: #e2e8f0; font-size: 0.8rem; line-height: 1.7; overflow-x: auto; }

/* Footer */
.footer { background: var(--bg-secondary); border-top: 1px solid var(--border); padding: var(--space-3xl) 0 var(--space-xl); }
.footer-content { display: grid; grid-template-columns: 1.5fr 2fr; gap: var(--space-3xl); margin-bottom: var(--space-2xl); }
.footer-brand { max-width: 300px; }
.tagline { font-size: 1rem; font-weight: 600; color: var(--accent-primary); margin-bottom: var(--space-sm); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); }
.link-column h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: var(--space-md); }
.link-column ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-sm); }
.link-column a { color: var(--text-secondary); font-size: 0.9rem; }
.link-column a:hover { color: var(--accent-primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--space-xl); border-top: 1px solid var(--border); }
.footer-bottom p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* Responsive */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: var(--space-2xl); text-align: center; }
  .hero-description { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-code { max-width: 100%; padding: 0 var(--space-md); }
  .code-window { max-width: 100%; }
  .code-content { font-size: 0.75rem; padding: var(--space-md); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .points-grid { grid-template-columns: 1fr; }
  .playground-container { grid-template-columns: 1fr; }
  .playground-sidebar { border-right: none; border-bottom: 1px solid var(--border); }
  .profile-tabs { flex-direction: column; align-items: stretch; }
  .profile-content { grid-template-columns: 1fr; }
  .demo-container { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .footer-brand { max-width: none; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: flex; }
  nav { position: fixed; top: 60px; left: 0; right: 0; background: var(--bg-primary); flex-direction: column; padding: var(--space-lg); gap: var(--space-md); border-bottom: 1px solid var(--border); transform: translateY(-100%); opacity: 0; visibility: hidden; transition: all var(--transition-base); }
  nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .hero { padding-top: 60px; min-height: auto; padding-bottom: var(--space-2xl); }
  .hero-content { gap: var(--space-xl); }
  .hero-code { width: 100%; max-width: 100vw; margin: 0 calc(-1 * var(--space-md)); padding: 0 var(--space-md); }
  .code-window { border-radius: 12px; max-width: calc(100vw - 2 * var(--space-md)); }
  .code-content { font-size: 0.7rem; line-height: 1.6; padding: var(--space-sm); overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .code-header { padding: var(--space-sm) var(--space-md); }
  .title-line { font-size: clamp(2.5rem, 12vw, 4rem); }
  .title-sub { font-size: clamp(1.25rem, 5vw, 2rem); }
  .features-grid { grid-template-columns: 1fr; }
  .comparison-table { font-size: 0.8rem; display: block; overflow-x: auto; }
  .comparison-table th, .comparison-table td { padding: var(--space-sm); white-space: nowrap; }
  .examples-grid { grid-template-columns: 1fr; }
  .example-code { font-size: 0.7rem; overflow-x: auto; }
  .footer-links { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-sm); text-align: center; }
  .hero-cta { flex-direction: column; align-items: center; }
  .hero-cta .btn { width: 100%; max-width: 280px; justify-content: center; }
  .hero-stats { gap: var(--space-lg); flex-wrap: wrap; justify-content: center; }
  .stat { align-items: center; }
  .tabs { overflow-x: auto; flex-wrap: nowrap; padding-bottom: var(--space-sm); }
  .tab { font-size: 0.8rem; padding: var(--space-sm); }
  .profile-tab { min-width: auto; padding: var(--space-sm) var(--space-md); }
  .tab-info { display: none; }
  .playground-main { min-height: 400px; }
  .category-tabs { overflow-x: auto; flex-wrap: nowrap; }
  .category-tab { white-space: nowrap; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .code-content { font-size: 0.65rem; }
  .comparison-table { font-size: 0.75rem; }
  .comparison-table th, .comparison-table td { padding: var(--space-xs); }
  .hero-stats { gap: var(--space-md); }
  .stat-value { font-size: 1.5rem; }
  .stat-label { font-size: 0.75rem; }
}

/* Tablet Optimizations */
@media (min-width: 768px) and (max-width: 1024px) {
  html { font-size: 18px; }
  .container { padding: 0 var(--space-xl); }
  .hero-code { max-width: 600px; margin: 0 auto; }
}