*, *::before, *::after { box-sizing: border-box; }
:root {
  color-scheme: light dark;
  --bg: #fbfaf8;
  --fg: #1c1c1e;
  --dim: #6b6b70;
  --line: #e3e0da;
  --accent: #b4532a;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #101012; --fg: #e8e6e3; --dim: #8d8d93; --line: #26262a; --accent: #e2895f; }
}
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2.5rem 1.5rem;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.7 ui-serif, Georgia, "Songti SC", "Noto Serif CJK SC", serif;
}
main { width: 100%; max-width: 34rem; }
h1 {
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}
h1 + .sub { margin: 0.35rem 0 0; color: var(--dim); font-size: 1rem; }
header { margin-bottom: 2.2rem; }
section { margin-bottom: 2rem; }
section p { margin: 0; }
nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 0;
  padding: 1.4rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Noto Sans SC", sans-serif;
  font-size: 0.9rem;
}
a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
a:hover, a:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }
footer {
  margin-top: 2.5rem;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  color: var(--dim);
}