:root { color-scheme: light dark; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
       line-height: 1.6; background: #fafafa; color: #222; }
@media (prefers-color-scheme: dark) { body { background: #121212; color: #e6e6e6; } a { color: #8ab4f8; } }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 1.5rem; }
header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
header a.brand { font-weight: 700; font-size: 1.25rem; text-decoration: none; color: inherit; }
nav a { margin-left: 1rem; }
h1 { font-size: 1.8rem; margin-top: 0; }
h2 { font-size: 1.2rem; margin-top: 2rem; }
.lang { border-top: 1px solid #8884; margin-top: 3rem; padding-top: 2rem; }
.muted { opacity: .7; font-size: .9rem; }
footer { opacity: .7; font-size: .9rem; border-top: 1px solid #8884; }