:root {
  --bg: #fbfbfd;
  --panel: #ffffff;
  --text: #16171d;
  --muted: #5d6070;
  --line: #e4e5ec;
  --accent: #4a55f0;
  --accent-soft: #eef0ff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1016;
    --panel: #171923;
    --text: #eceef5;
    --muted: #9ca0b3;
    --line: #262938;
    --accent: #8c95ff;
    --accent-soft: #1d2040;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding-inline: 20px; }

header.top { border-bottom: 1px solid var(--line); background: var(--panel); }
header.top .wrap { display: flex; align-items: center; gap: 10px; min-height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 650; font-size: 18px; }
.brand svg { flex: none; }
nav { margin-left: auto; display: flex; gap: 18px; font-size: 14px; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }

main { padding-block: 44px 64px; }
h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 36px 0 8px; }
h3 { font-size: 16px; margin: 20px 0 4px; }
p, li { color: var(--text); }
.lede { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.muted { color: var(--muted); }
ul { padding-left: 22px; }
li { margin: 4px 0; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin: 28px 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.card h3 { margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.note { background: var(--accent-soft); border-radius: 12px; padding: 16px 18px; margin: 24px 0; }
.note p { margin: 0; }

footer { border-top: 1px solid var(--line); padding-block: 22px; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--muted); }