:root {
  --accent: #f7801f;
  --text: #1f1f1f;
  --sub: #5f5f5f;
  --bg: #fffaf5;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #f2f2f2;
    --sub: #b5b5b5;
    --bg: #1b1714;
    --card: #26211d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}
header {
  background: var(--accent);
  color: #fff;
  padding: 28px 20px;
  text-align: center;
}
header h1 { margin: 0; font-size: 1.5rem; }
header p { margin: 4px 0 0; opacity: .9; }
main { max-width: 760px; margin: 0 auto; padding: 24px 20px 48px; }
section {
  background: var(--card);
  border-radius: 14px;
  padding: 8px 22px 16px;
  margin: 0 0 18px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .06);
}
h2 { font-size: 1.15rem; border-left: 5px solid var(--accent); padding-left: 10px; margin: 18px 0 10px; }
h3 { font-size: 1rem; margin: 16px 0 4px; }
p, li { color: var(--text); }
.sub { color: var(--sub); font-size: .9rem; }
a { color: var(--accent); }
nav { text-align: center; margin: 8px 0 24px; }
nav a { margin: 0 10px; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px 6px; border-bottom: 1px solid rgba(127, 127, 127, .25); }
th { white-space: nowrap; }
footer { text-align: center; color: var(--sub); font-size: .85rem; padding-bottom: 32px; }