:root { color-scheme: light dark; --bg:#FAFAF7; --fg:#25272B; --muted:#6b6b73; --card:#fff; --line:rgba(0,0,0,.08); --accent:#7C3AED; }
@media (prefers-color-scheme: dark) { :root { --bg:#0E0E10; --fg:#F4F4F1; --muted:#9a9aa3; --card:#1C1C1F; --line:rgba(255,255,255,.12); --accent:#9B6DFF; } }
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif; background: var(--bg); color: var(--fg); line-height: 1.85; -webkit-font-smoothing: antialiased; }
.wrap { max-width: 720px; margin: 0 auto; padding: 56px 20px 96px; }
.brand { font: 800 22px/1 ui-rounded, -apple-system, sans-serif; color: var(--accent); letter-spacing: .02em; text-decoration: none; }
h1 { font-size: 26px; margin: 20px 0 6px; }
.date { color: var(--muted); font-size: 14px; margin-bottom: 28px; }
h2 { font-size: 18px; margin: 32px 0 10px; }
p, li { margin-bottom: 10px; }
ul { margin-left: 20px; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 20px; margin: 16px 0; }
.en { margin-top: 56px; padding-top: 32px; border-top: 1px solid var(--line); }
.links a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-weight: 600; }
.muted { color: var(--muted); font-size: 14px; }