:root {
  color-scheme: dark;
  --bg: #071412;
  --surface: #0d211d;
  --text: #f4f0df;
  --muted: #b7c3bd;
  --gold: #ffc54d;
  --mint: #66dfba;
  --cyan: #7bdcff;
  --line: #2a7161;
  font: 17px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: var(--cyan); }
header, main, footer { width: min(900px, calc(100% - 40px)); margin: 0 auto; }
header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
header a { text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 18px; }
main { padding: 56px 0 80px; }
h1, h2 { line-height: 1.2; }
h1 { color: var(--gold); font-size: clamp(2rem, 7vw, 4rem); margin: 0 0 24px; }
h2 { color: var(--mint); margin-top: 2em; }
.lead { max-width: 700px; font-size: 1.2rem; }
.note { padding: 16px 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; min-height: 44px; align-items: center; padding: 8px 16px; border: 1px solid var(--mint); border-radius: 6px; color: var(--text); text-decoration: none; }
footer { padding: 24px 0 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
@media (max-width: 620px) { header { align-items: flex-start; flex-direction: column; } main { padding-top: 40px; } }