:root {
  --bg: #091321;
  --surface: #1a2d42;
  --sunken: #0a1829;
  --border: #3d607d;
  --fg: #f4f8ff;
  --fg2: #d0deee;
  --fg3: #aabed5;
  --accent: #3b68ea;
  --accent-hover: #5279f1;
  --link: #9eb6ff;
  --success: #67e0af;
  --violet: #c5adff;
  --orange: #ffb183;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg2);
  font: 15px/1.6 "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--link); }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

header.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(9, 19, 33, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(61, 96, 125, 0.5);
}
header.top .wrap { display: flex; align-items: center; gap: 12px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 700; font-size: 17px; text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
nav { margin-left: auto; display: flex; gap: 18px; }
nav a { color: var(--fg3); text-decoration: none; font-size: 14px; font-weight: 500; }
nav a:hover { color: var(--fg); }

.hero { padding: 72px 0 40px; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { color: var(--fg); font-size: 44px; line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.5px; }
.hero h1 span { color: var(--link); }
.hero p.lead { font-size: 17px; color: var(--fg2); margin: 0 0 28px; max-width: 520px; }
.badge { display: inline-block; padding: 4px 12px; border-radius: 999px; background: rgba(59, 104, 234, 0.16); color: var(--link); font-size: 13px; font-weight: 600; margin-bottom: 18px; }

.downloads { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px; border-radius: 12px;
  font-weight: 600; font-size: 15px; text-decoration: none;
  border: 1px solid var(--border); color: var(--fg); background: var(--surface);
  transition: background 0.12s;
}
.btn:hover { background: #243b54; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn small { display: block; font-weight: 500; font-size: 12px; opacity: 0.8; line-height: 1.2; }
.btn svg { width: 22px; height: 22px; flex: none; }
.note { font-size: 13px; color: var(--fg3); margin-top: 12px; }

.phones { display: flex; gap: 16px; justify-content: center; }
.phones img { width: 46%; max-width: 230px; border-radius: 28px; border: 1px solid var(--border); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45); }
.phones img:last-child { margin-top: 48px; }

section { padding: 56px 0; }
section h2 { color: var(--fg); font-size: 28px; margin: 0 0 8px; }
section p.sub { color: var(--fg3); margin: 0 0 32px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 22px; }
.card h3 { color: var(--fg); font-size: 16px; margin: 12px 0 6px; }
.card p { margin: 0; color: var(--fg3); font-size: 14px; }
.icon { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; color: #fff; font-size: 20px; }

.steps { counter-reset: s; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.steps .card::before { counter-increment: s; content: counter(s); display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; }

.doc { max-width: 780px; padding: 48px 20px 72px; margin: 0 auto; }
.doc h1 { color: var(--fg); font-size: 32px; margin-bottom: 4px; }
.doc h2 { color: var(--fg); font-size: 20px; margin-top: 32px; }
.doc .updated { color: var(--fg3); font-size: 13px; }
.doc li { margin: 6px 0; }

footer { border-top: 1px solid rgba(61, 96, 125, 0.5); padding: 28px 0 40px; color: var(--fg3); font-size: 13px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
footer nav { margin-left: auto; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 40px; }
  .hero h1 { font-size: 34px; }
  .grid, .steps { grid-template-columns: 1fr; }
  nav { display: none; }
  footer nav { display: flex; margin-left: 0; }
}