:root {
  color-scheme: light dark;
  --bg: #faf8f4;
  --surface: #ffffff;
  --text: #24211d;
  --muted: #6b645c;
  --accent: #356859;
  --border: #ded8cf;
  --link: #245e91;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181715;
    --surface: #22201d;
    --text: #f5f1ea;
    --muted: #beb6aa;
    --accent: #88c9b3;
    --border: #423d37;
    --link: #8dc9ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}
main {
  width: min(46rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0 5rem;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem 1.25rem;
  margin-bottom: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
}
header, section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: clamp(1.25rem, 4vw, 2rem);
  margin-bottom: 1rem;
}
h1, h2 { line-height: 1.2; }
h1 { margin: 0 0 .5rem; font-size: clamp(2rem, 7vw, 3.25rem); }
h2 { margin: 0 0 .75rem; font-size: 1.35rem; color: var(--accent); }
p:last-child, ul:last-child { margin-bottom: 0; }
.meta { color: var(--muted); margin: 0; }
.summary {
  border-left: .3rem solid var(--accent);
  padding-left: 1rem;
  margin-top: 1.5rem;
}
a { color: var(--link); }
li + li { margin-top: .4rem; }
.button {
  display: inline-block;
  padding: .7rem 1rem;
  border-radius: .75rem;
  background: var(--accent);
  color: var(--surface);
  font-weight: 700;
  text-decoration: none;
}
@media (prefers-color-scheme: dark) {
  .button { color: #16221e; }
}