:root {
  --bg: #FAF6EF;
  --surface: #FFFFFF;
  --ink: #1B1714;
  --muted: #6B625A;
  --line: #E8E0D4;
  --accent: #A83717;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191410;
    --surface: #241D18;
    --ink: #F7F2E9;
    --muted: #B5AA9C;
    --line: #3A3029;
    --accent: #F0603A;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Segoe UI", sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

header.site {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 0;
  font-size: 15px;
}

header.site a.brand {
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
}

a { color: var(--accent); }

h1 { font-size: 28px; line-height: 1.3; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }

.meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }

ul { padding-left: 1.3em; }
li { margin: 4px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 16px 0;
}

nav.links { display: grid; gap: 12px; margin-top: 24px; }
nav.links a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px 40px;
  color: var(--muted);
  font-size: 14px;
}

footer a { color: var(--muted); margin-right: 16px; }