:root { --bg: #f6f7f8; --panel: #ffffff; --ink: #1c2329; --muted: #5b6770; --line: #d9dee3; --accent: #0b6f86; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #12171c; --panel: #1b2229; --ink: #e6ebef; --muted: #9aa8b4; --line: #303b45; --accent: #5fd3e6; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.8 "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 24px; }
.brand { font-weight: 700; font-size: 22px; letter-spacing: .04em; color: var(--ink); text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 8px 0 20px; font-size: 14px; }
a { color: var(--accent); }
h1 { font-size: 24px; line-height: 1.4; margin: 8px 0 4px; }
h2 { font-size: 18px; line-height: 1.5; margin: 28px 0 6px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
section.lang { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 20px 20px; margin-bottom: 24px; }
ul, ol { padding-left: 1.3em; }
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 8px 0 16px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { width: 34%; font-weight: 600; }
footer { color: var(--muted); font-size: 13px; padding-bottom: 32px; }