:root {
  --bg: #fffdf7;
  --surface: #fff3d6;
  --text: #2b2522;
  --muted: #6b625c;
  --primary: #b45300;
  --border: #eadfcf;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1916;
    --surface: #2a241e;
    --text: #f2ebe4;
    --muted: #bdb3aa;
    --primary: #ffb26b;
    --border: #3d352d;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

header.site a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
}

header.site img {
  width: 56px;
  height: 56px;
  border-radius: 14px;
}

h1 {
  font-size: 1.6rem;
  line-height: 1.4;
  margin: 24px 0 8px;
}

h2 {
  font-size: 1.15rem;
  margin: 36px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1rem;
  margin: 24px 0 4px;
}

a {
  color: var(--primary);
  overflow-wrap: anywhere;
}

ul {
  padding-left: 1.4em;
}

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}