/* ============================================================
   ZLive Wallpaper — Landing page
   ============================================================ */

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

:root {
  --bg: #07070c;
  --bg-2: #0d0d18;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f5f7;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;

  --primary: #7c5cff;
  --primary-2: #22d3ee;
  --accent: #ec4899;

  --grad-primary: linear-gradient(135deg, #7c5cff 0%, #22d3ee 100%);
  --grad-accent:  linear-gradient(135deg, #ec4899 0%, #f59e0b 100%);
  --grad-text:    linear-gradient(135deg, #a78bfa 0%, #22d3ee 50%, #34d399 100%);

  --radius-sm: 10px;
  --radius:    16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-sm: 0 4px 16px rgba(0,0,0,.3);
  --shadow-md: 0 12px 32px rgba(0,0,0,.4);
  --shadow-lg: 0 24px 64px rgba(0,0,0,.5);
  --shadow-glow: 0 0 60px rgba(124, 92, 255, .35);

  --container: 1200px;
  --nav-h: 72px;
}

html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ============================================================
   Animated background
   ============================================================ */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(ellipse at top left, rgba(124,92,255,.08), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(34,211,238,.08), transparent 50%),
    var(--bg);
}

.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .4;
  mix-blend-mode: screen;
  animation: float 20s ease-in-out infinite;
}
.aurora.a1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #7c5cff, transparent 70%);
  top: -200px; left: -200px;
}
.aurora.a2 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, #22d3ee, transparent 70%);
  top: 20%; right: -300px;
  animation-delay: -7s;
}
.aurora.a3 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #ec4899, transparent 70%);
  bottom: -200px; left: 30%;
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.05); }
  66% { transform: translate(-30px, 40px) scale(0.95); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  background: rgba(7, 7, 12, .6);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled {
  background: rgba(7, 7, 12, .85);
  border-bottom-color: var(--border);
}
.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.logo-mark { width: 32px; height: 32px; display: inline-flex; }
.logo-mark svg { width: 100%; height: 100%; }
.logo-text { color: var(--text); font-family: 'Space Grotesk', sans-serif; }
.logo-text span { color: var(--text-muted); font-weight: 500; }

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-links a {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface); }

.nav-cta { display: flex; gap: 8px; align-items: center; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .2s, background .2s, border-color .2s, color .2s;
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 10px; }
.btn-lg { padding: 16px 30px; font-size: 16px; border-radius: 14px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(124, 92, 255, .35);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(124, 92, 255, .5);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.22);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  background: var(--surface);
  border-color: rgba(255,255,255,.22);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding: calc(var(--nav-h) + 60px) 0 100px;
  position: relative;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 12px #34d399;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(.85); }
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  font-weight: 700;
  margin: 0 0 20px;
}
.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.hero-sub {
  font-size: clamp(16px, 1.4vw, 19px);
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 0 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-meta {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.meta-item strong {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 26px;
  font-weight: 700;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  margin-bottom: 2px;
}
.meta-item span {
  font-size: 13px;
  color: var(--text-dim);
}

/* Hero visual / mockup */
.hero-visual {
  position: relative;
  perspective: 1500px;
}
.hero-glow {
  position: absolute;
  inset: -10%;
  background: radial-gradient(circle at center, rgba(124,92,255,.4), transparent 60%);
  filter: blur(60px);
  z-index: -1;
}

.mockup {
  position: relative;
  border-radius: 20px;
  background: #1a1a24;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: rotateY(-6deg) rotateX(4deg);
  transition: transform .4s ease;
  animation: mockupFloat 8s ease-in-out infinite;
}
.mockup:hover { transform: rotateY(0) rotateX(0); }

@keyframes mockupFloat {
  0%, 100% { transform: rotateY(-6deg) rotateX(4deg) translateY(0); }
  50% { transform: rotateY(-6deg) rotateX(4deg) translateY(-12px); }
}

.mockup-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: #15151f;
  border-bottom: 1px solid var(--border);
}
.mockup-bar .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }
.mockup-title {
  margin-left: 12px;
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 500;
}

.mockup-screen {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
}

.wallpaper-anim {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, #7c5cff, transparent 50%),
    radial-gradient(circle at 80% 20%, #22d3ee, transparent 50%),
    radial-gradient(circle at 60% 80%, #ec4899, transparent 50%),
    radial-gradient(circle at 30% 70%, #f59e0b, transparent 50%),
    linear-gradient(135deg, #1a1a2e, #16213e);
  filter: saturate(1.2);
  animation: heroBg 12s ease-in-out infinite;
}
@keyframes heroBg {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.1) rotate(2deg); }
}

.screen-overlay {
  position: absolute;
  inset: 0;
}

.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(20, 20, 30, .85);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  font-size: 12px;
  box-shadow: var(--shadow-md);
  animation: cardFloat 5s ease-in-out infinite;
}
.card-icon {
  width: 28px; height: 28px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--grad-primary);
  font-size: 12px;
  color: #fff;
  font-weight: 700;
}
.card-icon.green { background: linear-gradient(135deg, #34d399, #10b981); }
.card-icon.purple { background: linear-gradient(135deg, #a855f7, #ec4899); }
.card-title { font-weight: 600; color: var(--text); }
.card-sub { color: var(--text-dim); font-size: 11px; }
.card-1 { top: 16%; left: 8%; }
.card-2 { top: 50%; right: 8%; animation-delay: -1.5s; }
.card-3 { bottom: 16%; left: 18%; animation-delay: -3s; }

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ============================================================
   Trust strip
   ============================================================ */
.trust {
  padding: 50px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,.015);
}
.trust-label {
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: .15em;
  margin: 0 0 18px;
}
.trust-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}
.trust-row span:nth-child(even) { color: var(--text-dim); }

/* ============================================================
   Generic section
   ============================================================ */
.section { padding: 110px 0; position: relative; }
.section-alt {
  background:
    linear-gradient(180deg, transparent, rgba(124, 92, 255, .03) 50%, transparent);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}
.eyebrow {
  display: inline-block;
  padding: 5px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-2);
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.section-head h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin: 0 0 16px;
}
.section-head p {
  font-size: 17px;
  color: var(--text-muted);
  margin: 0;
}

/* ============================================================
   Features grid
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  position: relative;
  padding: 32px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform .2s, border-color .2s, background .2s;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: -2px; left: -2px; right: -2px; bottom: -2px;
  background: var(--grad-primary);
  border-radius: var(--radius-lg);
  opacity: 0;
  z-index: -1;
  transition: opacity .3s;
  filter: blur(20px);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--surface-2);
}
.feature-card:hover::before { opacity: .25; }

.feature-card.highlight {
  background: linear-gradient(160deg, rgba(124,92,255,.08), rgba(34,211,238,.04));
  border-color: rgba(124,92,255,.25);
}
.feature-icon {
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  background: var(--grad-primary);
  border-radius: 12px;
  margin-bottom: 20px;
  color: #fff;
  box-shadow: 0 8px 20px rgba(124, 92, 255, .3);
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}
.feature-tag {
  position: absolute;
  top: 18px; right: 18px;
  padding: 4px 10px;
  background: var(--grad-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: .03em;
}

/* ============================================================
   Gallery
   ============================================================ */
.gallery-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 36px;
}
.tab {
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: color .2s, background .2s, border-color .2s;
}
.tab:hover { color: var(--text); border-color: var(--border-strong); }
.tab.active {
  color: #fff;
  background: var(--grad-primary);
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(124, 92, 255, .35);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.gallery-item {
  position: relative;
  aspect-ratio: 16/10;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform .25s ease, border-color .2s;
}
.gallery-item:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: var(--border-strong);
}
.gallery-item.hidden { display: none; }
.gallery-anim {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c1), var(--c2));
}

.gallery-meta {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 14px 16px;
  background: linear-gradient(transparent, rgba(0,0,0,.85));
  display: flex;
  justify-content: space-between;
  align-items: end;
  font-size: 13px;
}
.gallery-meta span { font-weight: 600; }
.gallery-meta small { color: var(--text-dim); font-size: 11px; }

.gallery-cta { text-align: center; margin-top: 40px; }

/* Gallery animations */
.wave-anim {
  background: linear-gradient(135deg, var(--c1), var(--c2));
}
.wave-anim::before {
  content: ""; position: absolute; inset: -10%;
  background:
    radial-gradient(circle at 30% 40%, rgba(255,255,255,.3), transparent 40%),
    radial-gradient(circle at 70% 60%, rgba(255,255,255,.2), transparent 40%);
  animation: waveMove 6s ease-in-out infinite;
}
@keyframes waveMove {
  0%,100% { transform: translate(0,0); }
  50% { transform: translate(20px,-10px); }
}

.galaxy-anim::before {
  content: ""; position: absolute; inset: -20%;
  background:
    radial-gradient(circle at 50% 50%, rgba(255,255,255,.3), transparent 30%),
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.15), transparent 25%),
    radial-gradient(circle at 70% 70%, rgba(255,255,255,.2), transparent 30%);
  animation: spin 18s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.flow-anim::before {
  content: ""; position: absolute; inset: 0;
  background: conic-gradient(from 0deg, var(--c1), var(--c2), var(--c1));
  animation: spin 12s linear infinite;
  opacity: .85;
}

.grid-anim {
  background:
    linear-gradient(135deg, var(--c1), var(--c2)),
    linear-gradient(rgba(255,255,255,.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.1) 1px, transparent 1px);
  background-size: 100% 100%, 30px 30px, 30px 30px;
}
.grid-anim::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.18) 1px, transparent 1px);
  background-size: 30px 30px;
  animation: gridMove 4s linear infinite;
}
@keyframes gridMove { to { background-position: 30px 30px; } }

.sakura-anim::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, #fff 1px, transparent 2px),
    radial-gradient(circle at 60% 50%, #fff 1.5px, transparent 2.5px),
    radial-gradient(circle at 40% 70%, #fff 1px, transparent 2px),
    radial-gradient(circle at 80% 20%, #fff 1px, transparent 2px),
    radial-gradient(circle at 30% 90%, #fff 1px, transparent 2px);
  opacity: .7;
  animation: cardFloat 6s ease-in-out infinite;
}

.forest-anim::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at center bottom, rgba(0,0,0,.5), transparent 70%),
    radial-gradient(circle at 30% 20%, rgba(255,255,255,.2), transparent 30%);
  animation: waveMove 8s ease-in-out infinite;
}

.stars-anim {
  background: radial-gradient(ellipse at center, var(--c1), var(--c2));
}
.stars-anim::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(1px 1px at 25% 25%, #fff, transparent),
    radial-gradient(1px 1px at 50% 50%, #fff, transparent),
    radial-gradient(1px 1px at 75% 75%, #fff, transparent),
    radial-gradient(1px 1px at 33% 66%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 66% 33%, #fff, transparent);
  background-size: 200px 200px;
  animation: spin 30s linear infinite;
  opacity: .8;
}

.aurora2-anim::before {
  content: ""; position: absolute; inset: -20%;
  background: linear-gradient(45deg, var(--c1), var(--c2), var(--c1));
  background-size: 200% 200%;
  animation: gradMove 5s ease infinite;
  filter: blur(20px);
  opacity: .9;
}
@keyframes gradMove {
  0%,100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ============================================================
   Versions / timeline
   ============================================================ */
.timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 11px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), transparent);
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  margin-bottom: 32px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px; top: 16px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(124, 92, 255, .15);
}
.timeline-item:first-child::before {
  background: var(--grad-primary);
  border-color: transparent;
  box-shadow: 0 0 0 4px rgba(124, 92, 255, .25), 0 0 20px rgba(124, 92, 255, .5);
}
.timeline-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.timeline-tag.latest {
  background: var(--grad-primary);
  color: #fff;
  border-color: transparent;
}
.timeline-card {
  padding: 24px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .2s, transform .2s;
}
.timeline-card:hover {
  border-color: var(--border-strong);
  transform: translateX(4px);
}
.timeline-card header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.timeline-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 19px;
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.badge-version {
  font-size: 11px;
  padding: 2px 8px;
  background: rgba(52, 211, 153, .15);
  color: #34d399;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: .05em;
}
.timeline-card time {
  font-size: 13px;
  color: var(--text-dim);
}
.timeline-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}
.timeline-card li { margin-bottom: 4px; }
.timeline-card strong { color: var(--text); font-weight: 600; }

/* ============================================================
   Download
   ============================================================ */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  max-width: 1080px;
  margin: 0 auto 60px;
}
.download-card {
  padding: 32px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: left;
  transition: transform .2s, border-color .2s;
  position: relative;
  overflow: hidden;
}
.download-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}
.download-card.primary {
  background: linear-gradient(160deg, rgba(124,92,255,.12), rgba(34,211,238,.04));
  border-color: rgba(124,92,255,.3);
}
.download-card.primary::after {
  content: "Khuyên dùng";
  position: absolute;
  top: 18px; right: 18px;
  padding: 4px 10px;
  background: var(--grad-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: .03em;
}
.download-arch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.download-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 6px;
}
.download-card > p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 4px;
}
.download-size {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 22px;
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.step-num {
  flex-shrink: 0;
  width: 36px; height: 36px;
  display: grid;
  place-items: center;
  background: var(--grad-primary);
  border-radius: 50%;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  font-family: 'Space Grotesk', sans-serif;
}
.step h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 4px 0 4px;
}
.step p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-container { max-width: 820px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .2s, background .2s;
  overflow: hidden;
}
.faq-item[open] {
  background: var(--surface-2);
  border-color: var(--border-strong);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 300;
  color: var(--text-muted);
  transition: transform .2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

/* ============================================================
   Final CTA
   ============================================================ */
.cta-final { padding: 80px 0; }
.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding: 56px;
  background: linear-gradient(135deg, rgba(124,92,255,.18), rgba(34,211,238,.08));
  border: 1px solid rgba(124, 92, 255, .25);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(124,92,255,.3), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(34,211,238,.25), transparent 50%);
  z-index: -1;
}
.cta-card h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.cta-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
  background: rgba(0,0,0,.3);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 48px;
  margin-bottom: 50px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 320px;
  margin: 16px 0 0;
  line-height: 1.7;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.footer-cols h5 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text);
  margin: 0 0 16px;
}
.footer-cols a {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  padding: 6px 0;
  transition: color .2s;
}
.footer-cols a:hover { color: var(--text); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-dim);
}
.footer-legal { display: flex; gap: 24px; }
.footer-legal a { transition: color .2s; }
.footer-legal a:hover { color: var(--text); }

/* ============================================================
   Reveal animation
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 50px; }
  .hero-visual { max-width: 540px; margin: 0 auto; }
  .footer-inner { grid-template-columns: 1fr; gap: 36px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    padding: 12px;
    background: rgba(7, 7, 12, .98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open a {
    padding: 14px 20px;
    border-radius: 8px;
    width: 100%;
  }
}

@media (max-width: 640px) {
  .section { padding: 80px 0; }
  .hero { padding: calc(var(--nav-h) + 30px) 0 60px; }
  .hero-meta { gap: 24px; }
  .meta-item strong { font-size: 22px; }
  .cta-card { padding: 36px 28px; flex-direction: column; align-items: flex-start; text-align: left; }
  .install-steps { padding: 24px; }
  .floating-card { font-size: 11px; padding: 8px 12px; }
  .card-1 { top: 8%; left: 4%; }
  .card-2 { top: 50%; right: 4%; }
  .card-3 { bottom: 8%; left: 8%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}