:root { --bg: #f4f6f6; --fg: #1a2124; --muted: #5a666a; --line: #d7dede; --accent: #2c6a88; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #111517; --fg: #e4ebeb; --muted: #95a2a6; --line: #2a3437; --accent: #7db4cf; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; }
main { max-width: 640px; margin: 0 auto; padding: 48px max(20px, env(safe-area-inset-left)) 64px; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
h2 { font-size: 1.05rem; margin: 28px 0 4px; }
p, li { margin: 0 0 12px; }
.meta { color: var(--muted); font-size: 0.92rem; margin-bottom: 28px; }
a { color: var(--accent); }
footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }