:root {
  --accent: #0ea5e9;
  --accent-dark: #0369a1;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --danger: #dc2626;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent-dark: #7dd3fc;
    --bg: #0b1120;
    --surface: #111827;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #1f2937;
    --danger: #f87171;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent-dark); }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

header.top { border-bottom: 1px solid var(--border); background: var(--surface); }
header.top .wrap { display: flex; align-items: center; gap: 12px; min-height: 64px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 20px; color: var(--text); text-decoration: none; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
header.top nav { margin-left: auto; display: flex; gap: 16px; font-size: 15px; }
header.top nav a { text-decoration: none; color: var(--muted); }
header.top nav a:hover { color: var(--accent-dark); }

main { padding: 32px 0 48px; }

.hero { text-align: center; padding: 32px 0 16px; }
.hero img { width: 112px; height: 112px; border-radius: 26px; box-shadow: 0 12px 32px rgb(14 165 233 / 30%); }
.hero h1 { font-size: clamp(34px, 8vw, 48px); margin: 20px 0 4px; line-height: 1.1; }
.hero p.lead { font-size: 20px; color: var(--muted); margin: 0 auto 24px; max-width: 34ch; }
.badge { display: inline-block; padding: 10px 18px; border-radius: 999px; background: var(--accent); color: #fff; font-weight: 700; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin-top: 32px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 18px; }
.feature h2 { font-size: 17px; margin: 0 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

article h1 { font-size: clamp(28px, 6vw, 36px); line-height: 1.2; margin: 0 0 8px; }
article h2 { font-size: 21px; margin: 32px 0 8px; }
article h3 { font-size: 17px; margin: 20px 0 4px; }
article .meta { color: var(--muted); font-size: 15px; margin-top: 0; }
article ul { padding-left: 22px; }
article li { margin: 4px 0; }

.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; background: var(--surface); }
th, td { text-align: left; vertical-align: top; padding: 10px; border: 1px solid var(--border); }
th { background: var(--bg); }

.box { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 16px 20px; margin: 20px 0; }
.box.danger { border-color: var(--danger); }
ol.steps li { margin: 8px 0; }

.button { display: inline-block; padding: 12px 20px; border-radius: 12px; background: var(--accent); color: #fff; font-weight: 700; text-decoration: none; }

footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; padding: 24px 0 40px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; }