:root {
  --bg: #f8f7fc;
  --card: #ffffff;
  --text: #242033;
  --muted: #7f798f;
  --primary: #8267e8;
  --deep: #634ab8;
  --border: #ece9f2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15111f;
    --card: #1f1a2c;
    --text: #f1edf9;
    --muted: #aaa4b8;
    --border: #2e2840;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
  line-height: 1.6;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.mark { width: 40px; height: 40px; border-radius: 14px; background: var(--primary); display: grid; place-items: center; }
.brand { font-weight: 900; font-size: 22px; color: var(--text); text-decoration: none; }
h1 { font-size: 30px; line-height: 1.15; margin: 0 0 6px; font-weight: 900; }
h2 { font-size: 19px; margin: 30px 0 8px; font-weight: 800; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 22px; padding: 18px 20px; margin: 16px 0; }
a { color: var(--primary); font-weight: 700; }
nav { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
nav a { background: var(--card); border: 1px solid var(--border); border-radius: 999px; padding: 8px 14px; text-decoration: none; }
ol li, ul li { margin: 4px 0; }
footer { margin-top: 48px; font-size: 13px; color: var(--muted); }