:root { --yellow: #FFC700; --black: #111111; --white: #ffffff; }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--white); color: var(--black); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif; }
header { background: var(--black); color: var(--yellow); padding: 1.2rem 1.5rem; }
header .logo { font-weight: 800; font-size: 1.4rem; letter-spacing: 0.5px; }
header .logo span { color: var(--white); }
header a { color: inherit; text-decoration: none; }
main { max-width: 760px; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }
h1 { font-size: 2rem; margin-bottom: 0.3rem; }
.updated { color: #777; font-size: 0.9rem; margin-bottom: 2rem; }
h2 { font-size: 1.2rem; margin-top: 2rem; border-left: 4px solid var(--yellow); padding-left: 0.6rem; }
p, li { line-height: 1.6; color: #333; }
a { color: #111; }
.back { display: inline-block; margin-top: 2.5rem; font-weight: 700; color: var(--black); text-decoration: none; border-bottom: 2px solid var(--yellow); }
footer { text-align: center; padding: 1.5rem; color: #777; font-size: 0.85rem; border-top: 1px solid #eee; }
footer a { color: #555; text-decoration: none; margin: 0 0.5rem; }
footer .sep { color: #ccc; }