:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #ffffff;
  --muted: #666666;
  --border: #dddddd;
  --accent: #b3261e;
  --todo-bg: #fff3cd;
  --todo-fg: #7a5b00;
  --notice-border: #e0c060;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e6e6;
    --bg: #14161a;
    --muted: #a0a0a0;
    --border: #3a3d42;
    --accent: #ff8a80;
    --todo-bg: #4a3b00;
    --todo-fg: #ffdd80;
    --notice-border: #7a6220;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 2.5rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.9;
}

.page {
  max-width: 780px;
  margin: 0 auto;
}

h1 {
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

h2 {
  font-size: 1.15rem;
  margin-top: 2.25rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}

h3 {
  font-size: 1rem;
  margin-top: 1.5rem;
}

p,
li {
  font-size: 0.95rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.88rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: rgba(127, 127, 127, 0.08);
}

.notice {
  background: var(--todo-bg);
  color: var(--todo-fg);
  border: 1px solid var(--notice-border);
  border-radius: 6px;
  padding: 1rem 1.2rem;
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

.notice p {
  margin: 0.3rem 0;
}

mark.todo {
  background: var(--todo-bg);
  color: var(--todo-fg);
  padding: 0 0.25rem;
  border-radius: 3px;
  font-weight: 600;
}

.meta {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

nav.crumbs {
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

nav.crumbs a {
  color: var(--accent);
  text-decoration: none;
}

nav.crumbs a:hover {
  text-decoration: underline;
}

@media print {
  body {
    padding: 0;
  }
  .notice {
    display: none;
  }
}