:root { color-scheme: light dark; --ink:#1b1b1b; --ink3:#6b6b6b; --bg:#fbfaf7; --line:#e4e1da; --accent:#2b6cb0; }
@media (prefers-color-scheme: dark) { :root { --ink:#ececec; --ink3:#a3a3a3; --bg:#141414; --line:#2a2a2a; --accent:#7ab0f0; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--ink); font-family: -apple-system, "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif; line-height:1.8; }
main { max-width: 680px; margin: 0 auto; padding: 48px 22px 80px; }
header { display:flex; align-items:baseline; gap:14px; margin-bottom: 36px; }
header a { color:var(--ink); text-decoration:none; font-weight:700; font-size:20px; letter-spacing:.02em; }
header nav a { font-weight:400; font-size:14px; color:var(--ink3); margin-left:14px; }
h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 17px; margin: 36px 0 8px; padding-top: 14px; border-top: 1px solid var(--line); }
p, li { font-size: 15px; }
.note { color: var(--ink3); font-size: 13px; }
a { color: var(--accent); }
footer { margin-top: 56px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--ink3); font-size: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; vertical-align: top; padding: 8px 6px; border-bottom: 1px solid var(--line); }
th { color: var(--ink3); font-weight: 500; white-space: nowrap; }