:root {
  --bg: #E4EFF2; --surface: #FFFFFF; --text: #14303B; --muted: #4A6470;
  --primary: #214554; --accent: #2E6A7E; --line: #CFE0E6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0A171C; --surface: #12242B; --text: #E3EEF1; --muted: #A3BAC2;
          --primary: #8ED0DF; --accent: #8ED0DF; --line: #22404A; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 40px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
header img { width: 44px; height: auto; }
header a { color: var(--text); text-decoration: none; font-weight: 600; }
h1 { font-size: clamp(28px, 6vw, 36px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; color: var(--primary); }
.lead { color: var(--muted); margin: 0 0 28px; }
section { background: var(--surface); border-radius: 20px; padding: 22px 22px 8px; margin: 0 0 16px; }
h2 { font-size: 19px; margin: 0 0 10px; }
p, li { margin: 0 0 14px; }
ul, ol { padding-left: 22px; margin: 0 0 14px; }
a { color: var(--accent); }
.steps li { padding-left: 4px; }
.note { font-size: 15px; color: var(--muted); }
.cards { display: grid; gap: 12px; }
.cards a { display: block; background: var(--surface); border-radius: 18px; padding: 18px 20px;
           color: var(--text); text-decoration: none; border: 1px solid var(--line); }
.cards a strong { display: block; color: var(--primary); }
footer { margin-top: 32px; font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); }