:root {
  --ink: #0f172a;
  --sub: #475569;
  --line: #e2e8f0;
  --bg: #f8fafc;
  --paper: #ffffff;
  --accent: #2563eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e2e8f0;
    --sub: #94a3b8;
    --line: #334155;
    --bg: #0f172a;
    --paper: #111827;
    --accent: #60a5fa;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  line-height: 1.8;
  font-size: 15px;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}
h1 {
  font-size: 22px;
  margin: 8px 0 4px;
}
h2 {
  font-size: 17px;
  margin: 32px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line);
}
.meta {
  color: var(--sub);
  font-size: 13px;
}
a {
  color: var(--accent);
}
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
}
th,
td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px;
  border: 1px solid var(--line);
}
th {
  width: 34%;
  font-weight: 600;
}
@media (max-width: 520px) {
  th,
  td {
    display: block;
    width: 100%;
  }
  th {
    border-bottom: none;
  }
}
ul,
ol {
  padding-left: 1.4em;
}