:root { --teal: #00897b; --ink: #1f2933; --muted: #52606d; --bg: #ffffff; --line: #e4e7eb; }
@media (prefers-color-scheme: dark) { :root { --ink: #e4e7eb; --muted: #9aa5b1; --bg: #111418; --line: #2a3138; } }
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.8; }
header { background: var(--teal); color: #fff; padding: 24px 16px; }
header a { color: #fff; text-decoration: none; font-weight: 700; font-size: 1.25rem; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.2rem; margin-top: 2em; border-bottom: 1px solid var(--line); padding-bottom: 4px; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; } th, td { border: 1px solid var(--line); padding: 8px; text-align: left; vertical-align: top; }
footer { max-width: 760px; margin: 0 auto; padding: 16px; color: var(--muted); font-size: .85rem; border-top: 1px solid var(--line); }
a { color: var(--teal); }