:root {
  color-scheme: light dark;
  --ink: #14231f;
  --muted: #5d6d68;
  --paper: #f4f4ed;
  --card: #ffffff;
  --accent: #2d8372;
  --line: #dce5df;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}
main { max-width: 860px; margin: 0 auto; padding: 48px 22px 72px; }
header { margin-bottom: 34px; }
.mark { color: var(--accent); font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
h1 { font-size: clamp(2rem, 6vw, 3.4rem); line-height: 1.05; margin: 10px 0; }
h2 { margin-top: 34px; line-height: 1.2; }
h3 { margin-top: 24px; }
p, li { max-width: 72ch; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px; margin: 16px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
nav { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 22px; }
footer { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 18px; color: var(--muted); font-size: .92rem; }
.notice { border-left: 4px solid var(--accent); padding-left: 14px; color: var(--muted); }
@media (prefers-color-scheme: dark) {
  :root { --ink: #edf5f1; --muted: #b8c8c1; --paper: #0c1513; --card: #12201d; --line: #29423a; }
}