/* ==========================================================================
   MoYu (摩语) Official Website - Design System & Modern CSS
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Colors - Light Theme */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-subtle: rgba(226, 232, 240, 0.9);
  --border-strong: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  /* Brand Gradients & Accents */
  --brand-primary: #6366f1;
  --brand-primary-hover: #4f46e5;
  --brand-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #06b6d4 100%);
  --brand-gradient-glow: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, rgba(168, 85, 247, 0.08) 50%, transparent 70%);
  
  --accent-cyan: #06b6d4;
  --accent-purple: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.12), 0 4px 8px -4px rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 35px -5px rgba(99, 102, 241, 0.35);

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-normal: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);

  /* App Mockup Dark Frame (Always dark for terminal authenticity) */
  --mockup-bg: #14161f;
  --mockup-sidebar: #10121a;
  --mockup-content: #171924;
  --mockup-card: #1f2333;
  --mockup-border: rgba(255, 255, 255, 0.08);
  --mockup-text-primary: #f1f5f9;
  --mockup-text-secondary: #94a3b8;
}

[data-theme="dark"] {
  --bg-main: #0a0e17;
  --bg-surface: #111726;
  --bg-surface-elevated: #1a2236;
  --bg-glass: rgba(17, 23, 38, 0.82);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --brand-gradient-glow: radial-gradient(circle, rgba(99, 102, 241, 0.3) 0%, rgba(168, 85, 247, 0.15) 45%, transparent 70%);
  --shadow-glow: 0 0 45px -4px rgba(99, 102, 241, 0.55);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Subtle background radar/grid decoration */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(var(--border-subtle) 1.2px, transparent 1.2px);
  background-size: 32px 32px;
  opacity: 0.65;
  pointer-events: none;
  z-index: -1;
}

.glow-ambient {
  position: absolute;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: var(--brand-gradient-glow);
  filter: blur(100px);
  pointer-events: none;
  z-index: -1;
}

.glow-top {
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
}

.glow-mid {
  top: 1500px;
  right: -150px;
}

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: rgba(99, 102, 241, 0.12);
  color: var(--brand-primary);
  border: 1px solid rgba(99, 102, 241, 0.28);
  backdrop-filter: blur(8px);
}

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

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

/* ==========================================================================
   Header & Navbar
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition-normal);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-img {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.25);
}

.logo-title {
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-normal);
}

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

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

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

.icon-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
}

.lang-switch:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

/* ==========================================================================
   Hero Section & Harmonious Headline Typography
   ========================================================================== */
.hero {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge-wrap {
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.025em;
  margin-bottom: 22px;
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}

.hero-br {
  display: block;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

/* Download CTA Card */
.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  margin-bottom: 50px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 40px;
  border-radius: var(--radius-full);
  background: var(--brand-gradient);
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow-glow);
  transition: var(--transition-smooth);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 50px -2px rgba(99, 102, 241, 0.65);
}

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

/* CDN vs Official Switch - Ultra-clean Segmented Control */
.cdn-switch-bar {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.cdn-switch-label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.cdn-switch-label svg {
  color: var(--brand-primary);
}

.cdn-toggle {
  display: inline-flex;
  align-items: center;
  background: rgba(226, 232, 240, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.03);
}

[data-theme="dark"] .cdn-toggle {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.09);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

.cdn-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.cdn-toggle-btn:hover:not(.active) {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .cdn-toggle-btn:hover:not(.active) {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.cdn-toggle-btn.active {
  background: var(--brand-primary);
  color: #ffffff;
  box-shadow: 0 2px 10px -2px rgba(99, 102, 241, 0.45);
}

.cdn-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #94a3b8;
  transition: all 0.2s ease;
}

.cdn-toggle-btn.active .cdn-dot {
  background: #34d399;
  box-shadow: 0 0 6px #34d399;
}



/* ==========================================================================
   Hero Mockup Window (100% Dark Pure Mode, No Personal Path Leak)
   ========================================================================== */
.hero-mockup-wrap {
  margin-top: 24px;
  position: relative;
  border-radius: var(--radius-xl);
  padding: 10px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(99, 102, 241, 0.35) 100%);
  box-shadow: 0 25px 70px -15px rgba(0, 0, 0, 0.45);
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
}

[data-theme="dark"] .hero-mockup-wrap {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(99, 102, 241, 0.45) 100%);
}

.mockup-inner {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--mockup-bg);
  border: 1px solid var(--mockup-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
}

.mockup-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: var(--mockup-sidebar);
  border-bottom: 1px solid var(--mockup-border);
}

.mockup-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

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

.mockup-title {
  margin-left: auto;
  margin-right: auto;
  font-size: 0.82rem;
  font-weight: 500;
  color: #94a3b8;
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
}

/* Mockup Layout */
.mockup-body {
  display: grid;
  grid-template-columns: 210px 1fr;
  min-height: 480px;
  text-align: left;
}

.mockup-side {
  background: var(--mockup-sidebar);
  border-right: 1px solid var(--mockup-border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mockup-side-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: #94a3b8;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-normal);
}

.mockup-side-item:hover, .mockup-side-item.active {
  background: rgba(99, 102, 241, 0.15);
  color: #ffffff;
}

.mockup-side-item.active {
  font-weight: 600;
}

.mockup-content-area {
  background: var(--mockup-content);
  padding: 32px 36px;
  overflow: hidden;
}

.mockup-tab-content {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

.mockup-tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Home View in Mockup */
.mockup-greeting {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.mockup-sub {
  font-size: 0.92rem;
  color: #94a3b8;
  margin-bottom: 28px;
}

.mockup-feature-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 32px;
}

.mockup-f-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  background: var(--mockup-card);
  border: 1px solid var(--mockup-border);
  cursor: pointer;
  transition: var(--transition-normal);
}

.mockup-f-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.4);
}

.mockup-f-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.mockup-f-card h4 {
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.mockup-f-card p {
  color: #94a3b8;
  font-size: 0.82rem;
  line-height: 1.5;
}

/* Sanitized Safe Recent Documents */
.mockup-recent-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.mockup-recent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.mockup-recent-item {
  padding: 14px;
  border-radius: var(--radius-md);
  background: var(--mockup-card);
  border: 1px solid var(--mockup-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.mockup-recent-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  font-family: var(--font-mono);
}

.mockup-recent-name {
  font-size: 0.86rem;
  font-weight: 600;
  color: #e2e8f0;
}

.mockup-recent-path {
  font-size: 0.75rem;
  color: #64748b;
  font-family: var(--font-mono);
}

/* Translator View in Mockup */
.mockup-trans-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  height: 380px;
}

.mockup-trans-panel {
  background: var(--mockup-card);
  border: 1px solid var(--mockup-border);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.mockup-trans-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--mockup-border);
  margin-bottom: 14px;
}

.mockup-trans-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: #a5b4fc;
  text-transform: uppercase;
}

.mockup-trans-body {
  font-size: 0.95rem;
  color: #f1f5f9;
  line-height: 1.6;
  font-family: var(--font-mono);
}

/* Player View in Mockup */
.mockup-player-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  height: 380px;
}

.mockup-player-sidebar {
  background: var(--mockup-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--mockup-border);
  padding: 16px;
}

.mockup-player-main {
  background: var(--mockup-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--mockup-border);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.mockup-cw-text {
  font-size: 1rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.cw-active-word {
  background: #4f46e5;
  color: #ffffff;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
}

/* ==========================================================================
   Interactive Live Morse Audio Section
   ========================================================================== */
.live-demo-section {
  padding: 80px 0;
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.demo-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 38px;
  max-width: 920px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.demo-header {
  text-align: center;
  margin-bottom: 30px;
}

.demo-header h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.demo-box {
  display: flex;
  flex-direction: column;
}

.demo-box label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.demo-textarea {
  width: 100%;
  height: 110px;
  padding: 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 1rem;
  resize: none;
  outline: none;
  transition: var(--transition-normal);
}

.demo-textarea:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.demo-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.demo-sliders {
  display: flex;
  align-items: center;
  gap: 24px;
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.slider-group input[type="range"] {
  accent-color: var(--brand-primary);
  cursor: pointer;
}

.play-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-full);
  background: var(--brand-primary);
  color: #fff;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
}

.play-btn:hover {
  background: var(--brand-primary-hover);
  transform: translateY(-1px);
}

.play-btn.playing {
  background: var(--accent-emerald);
  animation: pulse-dot 1.5s infinite;
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.features-section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 680px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.icon-purple { background: rgba(168, 85, 247, 0.12); color: #a855f7; }
.icon-cyan { background: rgba(6, 182, 212, 0.12); color: #06b6d4; }
.icon-indigo { background: rgba(99, 102, 241, 0.12); color: #6366f1; }
.icon-amber { background: rgba(245, 158, 11, 0.12); color: #f59e0b; }

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ==========================================================================
   Gallery Showcase Section (Adaptive Theme & Lang Real Screenshots)
   ========================================================================== */
.gallery-section {
  padding: 90px 0;
  background: var(--bg-surface-elevated);
}

.gallery-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
}

.tab-btn.active {
  background: var(--brand-primary);
  color: #fff;
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-sm);
}

.gallery-display {
  max-width: 1040px;
  margin: 0 auto;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 25px 70px -15px rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-subtle);
  background: var(--mockup-bg);
  display: flex;
  flex-direction: column;
}

.mockup-img-container {
  width: 100%;
  background: #0d1117;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mockup-img, .gallery-img {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 0.25s ease;
}

/* ==========================================================================
   Downloads Matrix Section
   ========================================================================== */
.download-section {
  padding: 100px 0;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.download-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-normal);
}

.download-card.highlight {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-glow);
}

.download-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.download-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--brand-primary);
  color: #fff;
  text-transform: uppercase;
}

.download-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--brand-primary);
}

.download-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.download-links {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dl-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  transition: var(--transition-normal);
}

.dl-btn:hover {
  background: var(--brand-primary);
  color: #ffffff;
  border-color: var(--brand-primary);
}

.dl-btn .format {
  font-size: 0.75rem;
  opacity: 0.7;
  font-family: var(--font-mono);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 60px 0 30px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: var(--transition-normal);
}

.footer-col a:hover {
  color: var(--brand-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 860px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .hero-br {
    display: inline;
  }
  .mockup-body {
    grid-template-columns: 1fr;
  }
  .mockup-side {
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--mockup-border);
  }
  .demo-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .nav-menu {
    display: none;
  }
}