:root {
  --bg: #fdfdfc;
  --fg: #1b1b1a;
  --muted: #6b6b66;
  --line: #e6e5e0;
  --accent: #2f6f4f;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413;
    --fg: #ededea;
    --muted: #a1a19b;
    --line: #2c2c2a;
    --accent: #7fc4a0;
    --card: #1c1c1b;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

nav { display: flex; justify-content: space-between; align-items: center; padding: 24px 0; }
.brand { color: var(--fg); font-weight: 600; }
.links a { margin-left: 18px; color: var(--muted); }

section { padding: 40px 0; border-top: 1px solid var(--line); }
section:first-child { border-top: 0; }
h1 { font-size: 2.4rem; line-height: 1.15; margin: 24px 0 12px; }
h2 { font-size: 1.3rem; margin: 0 0 16px; }
h3 { font-size: 1.05rem; margin: 0 0 6px; }
p { margin: 0 0 12px; }
#about p { color: var(--muted); font-size: 1.1rem; max-width: 56ch; }

.cards { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px;
         grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.card p { color: var(--muted); font-size: 0.95rem; }

.contact { list-style: none; padding: 0; margin: 0; display: flex; gap: 20px; flex-wrap: wrap; }

footer { padding-bottom: 48px; color: var(--muted); font-size: 0.9rem; }
footer p { border-top: 1px solid var(--line); padding-top: 32px; }