:root {
  --bg: #0b1220;
  --bg2: #111827;
  --card: #131c2e;
  --border: #1e293b;
  --text: #e5edf7;
  --muted: #93a4bd;
  --accent: #38bdf8;
  --accent2: #34d399;
  --danger: #f87171;
  --radius: 14px;
  --maxw: 760px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* Header / nav */
header.site {
  border-bottom: 1px solid var(--border);
  background: rgba(11,18,32,.85);
  backdrop-filter: blur(10px);
  position: sticky; top: 0; z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.brand .dot { width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 12px var(--accent); }
nav a { color: var(--muted); margin-left: 18px; font-size: 14px; }
nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero { text-align: center; padding: 72px 0 48px; }
.hero h1 { font-size: 40px; margin: 0 0 12px; letter-spacing: -.5px; }
.hero p.tag { font-size: 18px; color: var(--muted); max-width: 540px; margin: 0 auto 28px; }
.badge { display: inline-block; padding: 6px 14px; border: 1px solid var(--border);
  border-radius: 999px; color: var(--muted); font-size: 13px; }

/* Content */
main { padding: 40px 0 80px; }
h2 { font-size: 24px; margin: 36px 0 12px; letter-spacing: -.3px; }
h3 { font-size: 17px; margin: 24px 0 6px; color: var(--text); }
p, li { color: var(--text); }
.muted { color: var(--muted); }
small, .small { font-size: 13px; color: var(--muted); }
ul { padding-left: 20px; }
li { margin: 6px 0; }

/* Cards / feature grid */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 28px 0; }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.card h3 { margin-top: 0; }
.card .ic { font-size: 22px; }

.note {
  background: rgba(56,189,248,.08); border: 1px solid rgba(56,189,248,.25);
  border-radius: var(--radius); padding: 16px 18px; margin: 20px 0;
}

/* Footer */
footer.site { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: 13px; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center; }
footer.site a { color: var(--muted); }