:root {
  --ridge: #2f4634;
  --bg: #fbf9f4;
  --surface: #ffffff;
  --border: #ddd7c7;
  --text: #1b1b18;
  --text-2: #5b5a52;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ridge: #9cc3a4;
    --bg: #161a17;
    --surface: #1f2420;
    --border: #3a4038;
    --text: #ecebe6;
    --text-2: #b3b1a7;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    17px/1.6 -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
}
main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}
header {
  margin-bottom: 32px;
}
.brand {
  color: var(--ridge);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}
h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 8px 0 4px;
}
h2 {
  font-size: 1.2rem;
  margin: 32px 0 8px;
}
p,
li {
  color: var(--text);
}
.meta {
  color: var(--text-2);
  font-size: 0.95rem;
  margin: 0;
}
.box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
}
a {
  color: var(--ridge);
}
footer {
  margin-top: 48px;
  color: var(--text-2);
  font-size: 0.9rem;
}