:root {
  --bg: #0b0d10;
  --panel: #14181d;
  --panel-2: #1a2027;
  --text: #f5f7fa;
  --muted: #a8b0bb;
  --accent: #168cff;
  --line: #252c34;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.shell { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
nav {
  position: sticky;
  top: 0;
  backdrop-filter: blur(18px);
  background: rgba(11,13,16,.86);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.brand { font-weight: 800; letter-spacing: -.02em; color: var(--text); }
.nav-links { display: flex; gap: 18px; font-size: 14px; }
.hero { padding: 88px 0 56px; text-align: center; }
.badge {
  display: inline-block;
  padding: 6px 11px;
  border: 1px solid rgba(22,140,255,.35);
  border-radius: 999px;
  background: rgba(22,140,255,.10);
  color: #73baff;
  font-weight: 700;
  font-size: 13px;
}
h1 { font-size: clamp(42px, 8vw, 72px); margin: 14px 0 10px; letter-spacing: -.05em; line-height: 1; }
h2 { font-size: 28px; margin-top: 0; letter-spacing: -.025em; }
h3 { font-size: 18px; margin-bottom: 6px; }
.lede { max-width: 660px; margin: 0 auto; color: var(--muted); font-size: 18px; }
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 34px 0 64px;
}
.card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
}
.card p { color: var(--muted); margin-bottom: 0; }
.section { padding: 42px 0 64px; }
.content {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(22px, 5vw, 42px);
}
.content p, .content li { color: var(--muted); }
.content strong { color: var(--text); }
footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  padding: 28px 0 44px;
  margin-top: 50px;
}
.btn {
  display: inline-block;
  margin-top: 22px;
  padding: 11px 17px;
  border-radius: 12px;
  background: var(--accent);
  color: white;
  font-weight: 750;
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.note {
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  color: var(--muted);
}
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .nav-links { gap: 12px; }
  .hero { padding-top: 64px; }
}