:root {
  --bg: #f6f7fb; --fg: #0e1220; --muted: #5d6480; --card: rgba(255,255,255,.72);
  --line: rgba(14,18,32,.09); --accent: #5465ff; --accent2: #a855f7; --accent3: #06b6d4;
  --shadow: 0 10px 40px rgba(20,24,60,.08); --radius: 20px;
}
[data-theme="dark"] {
  --bg: #070912; --fg: #eef0fb; --muted: #9aa1bf; --card: rgba(20,24,42,.6);
  --line: rgba(255,255,255,.08); --shadow: 0 10px 40px rgba(0,0,0,.35);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh; display: flex; flex-direction: column;
  transition: background .3s, color .3s;
}
main { flex: 1; position: relative; z-index: 1; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
a { color: var(--accent); text-decoration: none; }
::selection { background: var(--accent); color: #fff; }

/* Animated background */
.bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.bg canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.blob { position: absolute; width: 46vmax; height: 46vmax; border-radius: 50%;
  filter: blur(90px); opacity: .35; animation: drift 26s ease-in-out infinite alternate; }
[data-theme="dark"] .blob { opacity: .28; }
.blob.b1 { background: var(--accent); top: -18vmax; left: -12vmax; }
.blob.b2 { background: var(--accent2); bottom: -20vmax; right: -14vmax; animation-delay: -8s; }
.blob.b3 { background: var(--accent3); top: 30%; left: 45%; width: 30vmax; height: 30vmax; opacity: .18; animation-delay: -16s; }
@keyframes drift {
  0% { transform: translate(0,0) scale(1); }
  50% { transform: translate(8vmax,6vmax) scale(1.15); }
  100% { transform: translate(-6vmax,10vmax) scale(.95); }
}
.bg::after { content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: radial-gradient(ellipse at 50% 0%, #000 10%, transparent 70%); opacity: .6; }

/* Header */
header { position: sticky; top: 0; z-index: 20; transition: background .3s, border-color .3s, box-shadow .3s;
  border-bottom: 1px solid transparent; }
header.scrolled { backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4);
  background: color-mix(in srgb, var(--bg) 70%, transparent); border-color: var(--line); }
.bar { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { font-weight: 800; font-size: 1.3rem; letter-spacing: -.02em; color: var(--fg); display: flex; align-items: center; gap: 10px; }
.logo { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; color: #fff; font-size: .95rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2)); box-shadow: 0 6px 18px rgba(84,101,255,.4); }
nav { display: flex; align-items: center; gap: 2px; }
nav a { color: var(--muted); padding: 8px 14px; border-radius: 10px; font-size: .93rem; font-weight: 500; transition: color .2s, background .2s; }
nav a:hover, nav a.active { color: var(--fg); background: var(--line); }
.icon-btn { background: none; border: 1px solid var(--line); color: var(--fg); width: 38px; height: 38px;
  border-radius: 10px; cursor: pointer; display: grid; place-items: center; margin-left: 8px; transition: background .2s; }
.icon-btn:hover { background: var(--line); }
.burger { display: none; }

/* Hero */
.hero { text-align: center; padding: 110px 0 80px; }
.badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; font-size: .85rem;
  color: var(--muted); background: var(--card); border: 1px solid var(--line); backdrop-filter: blur(8px); margin-bottom: 26px; }
.badge i { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 0 rgba(34,197,94,.6); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(34,197,94,0); } 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0); } }
.hero h1 { font-size: clamp(2.6rem, 7vw, 5rem); line-height: 1.04; letter-spacing: -.04em; margin: 0 0 22px; font-weight: 800; }
.grad { background: linear-gradient(120deg, var(--accent), var(--accent2), var(--accent3), var(--accent));
  background-size: 300% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shine 8s linear infinite; }
@keyframes shine { to { background-position: 300% 0; } }
.rotator { display: inline-block; min-width: 4ch; transition: opacity .35s, transform .35s; }
.rotator.out { opacity: 0; transform: translateY(12px); }
.hero p.lead { color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); max-width: 600px; margin: 0 auto 36px; }
.actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: 14px; font-weight: 600;
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent2)); box-shadow: 0 10px 30px rgba(84,101,255,.35);
  transition: transform .2s, box-shadow .2s; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(84,101,255,.45); }
.btn.ghost { background: var(--card); color: var(--fg); border: 1px solid var(--line); box-shadow: none; backdrop-filter: blur(8px); }
.btn.ghost:hover { background: var(--line); }
.scroll-hint { margin-top: 70px; color: var(--muted); font-size: .8rem; letter-spacing: .2em; text-transform: uppercase; }
.scroll-hint::after { content: ""; display: block; width: 1px; height: 40px; margin: 12px auto 0;
  background: linear-gradient(var(--muted), transparent); animation: drop 2s ease-in-out infinite; }
@keyframes drop { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* Sections */
section { padding: 60px 0; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: .8rem; letter-spacing: .18em; text-transform: uppercase; }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -.03em; line-height: 1.15; margin: 8px 0 14px; }
.sub { color: var(--muted); max-width: 560px; margin: 0 0 36px; }
.center { text-align: center; } .center .sub { margin-left: auto; margin-right: auto; }
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card { position: relative; display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; color: var(--fg); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .3s, border-color .3s; }
.card::before { content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity .3s; pointer-events: none;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(84,101,255,.14), transparent 45%); }
.card:hover::before { opacity: 1; }
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.card h3 { margin: 18px 0 8px; font-size: 1.2rem; letter-spacing: -.01em; }
.card p { color: var(--muted); margin: 0; }
.ico { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; font-size: 1.4rem;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 18%, transparent), color-mix(in srgb, var(--accent2) 18%, transparent));
  border: 1px solid var(--line); }
.ico img { width: 100%; height: 100%; object-fit: cover; border-radius: inherit; display: block; }
.app-card .ico { overflow: hidden; padding: 0; background: #fff; }
.app-card { display: flex; gap: 20px; align-items: flex-start; }
.app-card .ico { width: 64px; height: 64px; font-size: 2rem; flex-shrink: 0; }
.app-card h3 { margin-top: 0; }
.tag { display: inline-block; margin-top: 14px; font-size: .75rem; font-weight: 600; padding: 4px 12px; border-radius: 999px;
  background: var(--line); color: var(--muted); }
.more { display: inline-block; margin-top: 14px; margin-left: 10px; font-size: .9rem; font-weight: 600; }

.cta { text-align: center; padding: 56px 28px; border-radius: 28px; position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent2)); box-shadow: 0 20px 60px rgba(84,101,255,.35); }
.cta h2 { color: #fff; margin-top: 0; }
.cta p { opacity: .9; margin: 0 0 28px; }
.cta .btn { background: #fff; color: #1b1f3a; box-shadow: none; }

/* Document pages */
.doc { max-width: 800px; margin: 50px auto 70px; padding: 48px; }
.doc:hover { transform: none; }
.doc h1 { font-size: clamp(2rem, 5vw, 2.8rem); letter-spacing: -.03em; line-height: 1.1; margin: 0 0 8px; }
.doc h2 { font-size: 1.25rem; margin: 34px 0 8px; letter-spacing: -.01em; }
.doc p, .doc li { color: var(--muted); }
.doc .meta { margin-bottom: 28px; font-size: .9rem; }
.doc li { margin: 6px 0; }
.doc strong { color: var(--fg); }

footer { position: relative; z-index: 1; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem;
  background: color-mix(in srgb, var(--bg) 60%, transparent); backdrop-filter: blur(10px); }
.foot { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; padding: 28px 24px; }
.foot nav a { padding: 4px 10px; font-size: .85rem; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .1s; } .d2 { transition-delay: .2s; } .d3 { transition-delay: .3s; }

@media (max-width: 820px) {
  .burger { display: grid; }
  header nav#nav { display: none; position: absolute; top: 70px; left: 12px; right: 12px; flex-direction: column; align-items: stretch;
    background: var(--bg); border: 1px solid var(--line); border-radius: 16px; padding: 10px; box-shadow: var(--shadow); }
  header nav#nav.open { display: flex; }
  .doc { padding: 28px 22px; margin: 24px auto 40px; }
  .hero { padding: 70px 0 50px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}
.app-head { display: flex; align-items: center; gap: 20px; margin-bottom: 8px; }
.app-head img { border-radius: 20px; box-shadow: var(--shadow); background: #fff; }
.app-head .meta { margin: 0; }
.app-head h1 { margin-bottom: 4px; }