:root { --bg: #f4f5f7; --card: #fff; --text: #1b1f24; --muted: #6a737d; --accent: #2563eb; --border: #e1e4e8; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1115; --card: #171a21; --text: #e6e8eb; --muted: #8b949e; --accent: #4f8cff; --border: #2a2f3a; } }
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
main.card { max-width: 820px; margin: 48px auto; padding: 32px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; }
h1 { margin: 0 0 16px; font-size: 26px; }
a { color: var(--accent); }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
pre { background: var(--bg); padding: 12px; border-radius: 8px; overflow: auto; }
.btn { display: inline-block; padding: 10px 18px; background: var(--accent); color: #fff; border-radius: 8px; text-decoration: none; font-weight: 600; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0; }
@media (max-width: 640px) { .grid { grid-template-columns: 1fr; } main.card { margin: 16px; padding: 20px; } }
.tile { display: block; padding: 18px; border: 1px solid var(--border); border-radius: 12px; text-decoration: none; color: inherit; background: var(--bg); }
.tile:hover { border-color: var(--accent); }
.tile h2 { margin: 0 0 8px; font-size: 18px; color: var(--accent); }
.tile p { margin: 0; color: var(--muted); font-size: 14px; }
.muted { color: var(--muted); font-size: 13px; }
.who { color: var(--muted); }