:root {
  color-scheme: light dark;
  --bg: #f5f4ef;
  --panel: #ffffff;
  --text: #152423;
  --muted: #526765;
  --brand: #1f6f6a;
  --line: #cbd8d5;
}

@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1716; --panel: #172220; --text: #edf6f4; --muted: #abc0bc; --line: #34514c; }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.6 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { width: min(960px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 72px; }
nav { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 48px; }
a { color: var(--brand); }
.hero, .card { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 28px; }
.hero img { width: min(100%, 720px); display: block; margin: 24px auto 0; border-radius: 12px; }
h1 { font-size: clamp(2.4rem, 8vw, 5rem); line-height: 1; margin: 0 0 20px; }
h2 { margin-top: 44px; }
.tag { color: var(--brand); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.muted { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
code { overflow-wrap: anywhere; }
footer { color: var(--muted); margin-top: 48px; border-top: 1px solid var(--line); padding-top: 24px; }