:root {
  color-scheme: light dark;
  --background: #f5f7f3;
  --surface: #ffffff;
  --text: #17201b;
  --muted: #617068;
  --accent: #0b725f;
  --border: #dce5df;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0c110e;
    --surface: #141b17;
    --text: #edf4ef;
    --muted: #a8b6ae;
    --accent: #70c8ad;
    --border: #28352e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Tahoma, Arial, sans-serif;
  line-height: 1.85;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 48px auto;
  padding: clamp(24px, 5vw, 52px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
}

h1, h2 { line-height: 1.35; }
h1 { margin-top: 0; }
h2 { margin-top: 32px; font-size: 1.2rem; }
p { margin: 10px 0; }
.muted { color: var(--muted); }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}