:root {
  --beer: #f5a81a;
  --beer-deep: #c9760a;
  --ink: #1f1b16;
  --muted: #6b6357;
  --bg: #fff9f0;
  --card: #ffffff;
  --line: #efe6d6;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
}

header.site {
  background: linear-gradient(160deg, #ffb638 0%, #ee9412 55%, #ce7a05 100%);
  color: #2a1c06;
  text-align: center;
  padding: 56px 20px 48px;
}

header.site .logo {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

header.site .tagline {
  margin-top: 8px;
  font-size: 15px;
  opacity: 0.85;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
}

h1 {
  font-size: 24px;
  margin: 0 0 4px;
}

.updated {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 24px;
}

h2 {
  font-size: 18px;
  margin: 32px 0 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

h2:first-of-type { border-top: none; padding-top: 0; }

h3 { font-size: 16px; margin: 20px 0 4px; }

p, li { font-size: 15px; color: #2b2620; }

a { color: var(--beer-deep); }

ul { padding-left: 1.2em; }

.home-links {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}

.home-links a {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
}

.home-links a span { color: var(--muted); font-weight: 400; font-size: 13px; display: block; }

nav.back { margin-bottom: 16px; }
nav.back a { font-size: 14px; text-decoration: none; }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 32px 20px 48px;
}