:root {
  --bg: #0b1220;
  --bg-soft: #0f172a;
  --card: #131c30;
  --card-border: #1f2b45;
  --text: #e7eef9;
  --muted: #94a6c3;
  --accent: #22d3ee;
  --accent-2: #38bdf8;
  --accent-dark: #0e7490;
  --ok: #34d399;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 18, 32, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--card-border);
}
.header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px; color: var(--text);
}
.logo:hover { text-decoration: none; }
.logo svg { width: 28px; height: 28px; }
.nav { display: flex; gap: 24px; }
.nav a { color: var(--muted); font-size: 15px; }
.nav a:hover { color: var(--text); text-decoration: none; }
@media (max-width: 720px) { .nav { display: none; } }

/* Hero */
.hero {
  padding: 96px 0 72px;
  text-align: center;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(34, 211, 238, .12), transparent),
    radial-gradient(600px 300px at 80% 10%, rgba(56, 189, 248, .10), transparent);
}
.hero h1 {
  font-size: 42px; line-height: 1.2; font-weight: 800;
  max-width: 760px; margin: 0 auto 18px;
}
.hero h1 span { color: var(--accent); }
.hero p {
  color: var(--muted); font-size: 18px; max-width: 640px; margin: 0 auto 32px;
}
.btn-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 13px 28px; border-radius: 10px;
  font-weight: 600; font-size: 16px;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06222b;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost {
  border: 1px solid var(--card-border); color: var(--text);
  background: var(--bg-soft);
}
.btn-ghost:hover { border-color: var(--accent); }

/* Sections */
section { padding: 64px 0; }
.section-title {
  font-size: 30px; font-weight: 700; text-align: center; margin-bottom: 10px;
}
.section-sub { text-align: center; color: var(--muted); margin-bottom: 44px; }

/* Features */
.grid-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-3 { grid-template-columns: 1fr; } }
.card {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 14px; padding: 26px;
}
.card h3 { font-size: 18px; margin: 14px 0 8px; }
.card p { color: var(--muted); font-size: 15px; }
.icon {
  width: 44px; height: 44px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(34, 211, 238, .12);
}
.icon svg { width: 24px; height: 24px; stroke: var(--accent); }

/* Tariffs */
.tariffs { background: var(--bg-soft); }
.grid-4 {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
@media (max-width: 900px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-4 { grid-template-columns: 1fr; } }
.plan {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 14px; padding: 28px 24px; text-align: center;
  display: flex; flex-direction: column;
}
.plan.best { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 12px 40px rgba(34,211,238,.08); }
.plan .tag {
  align-self: center; font-size: 12px; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--accent);
  background: rgba(34,211,238,.12); border-radius: 999px; padding: 4px 12px;
  margin-bottom: 12px;
}
.plan .dur { color: var(--muted); font-size: 15px; }
.plan .price { font-size: 34px; font-weight: 800; margin: 8px 0 2px; }
.plan .per { color: var(--muted); font-size: 13px; min-height: 20px; }
.plan ul { list-style: none; margin: 18px 0 22px; flex: 1; }
.plan li { font-size: 14px; color: var(--muted); padding: 5px 0; }
.plan li b { color: var(--text); font-weight: 600; }
.plan .btn { width: 100%; text-align: center; }
.plan-note { text-align: center; color: var(--muted); font-size: 13px; margin-top: 26px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.step { background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 26px; position: relative; }
.step .num {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06222b; font-weight: 800; display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px; font-size: 15px;
}
.step h3 { font-size: 17px; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 15px; }

/* Platforms */
.chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.chip {
  background: var(--card); border: 1px solid var(--card-border);
  color: var(--text); border-radius: 999px; padding: 8px 18px; font-size: 14px;
}

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
details {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 12px; padding: 18px 22px; margin-bottom: 12px;
}
details summary { cursor: pointer; font-weight: 600; font-size: 16px; }
details p { color: var(--muted); margin-top: 10px; font-size: 15px; }

/* Footer */
.footer { border-top: 1px solid var(--card-border); padding: 40px 0; margin-top: 40px; }
.footer .container { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
.footer .brand { font-weight: 700; }
.footer .muted { color: var(--muted); font-size: 14px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text); }

/* Doc pages */
.doc { max-width: 820px; margin: 0 auto; padding: 56px 20px 80px; }
.doc h1 { font-size: 32px; margin-bottom: 8px; }
.doc .updated { color: var(--muted); font-size: 14px; margin-bottom: 36px; }
.doc h2 { font-size: 21px; margin: 32px 0 10px; }
.doc p, .doc li { color: #c3d0e4; font-size: 15.5px; margin-bottom: 12px; }
.doc ul, .doc ol { padding-left: 22px; margin-bottom: 16px; }
.doc a { color: var(--accent); }