:root { --bg: #fff; --text: #18181b; --muted: #63636b; --border: #e4e4e7; --primary: #7b1830; }
@media (prefers-color-scheme: dark) { :root { --bg: #111113; --text: #ededef; --muted: #a1a1aa; --border: #2e2e33; --primary: #e0738c; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 16px; }
h1 { font-size: 22px; } h2 { font-size: 18px; margin: 0 0 4px; }
section { border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin: 14px 0; }
.muted { color: var(--muted); font-size: 14px; }
button { font: inherit; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--primary); background: var(--primary); color: #fff; margin: 4px 4px 4px 0; }
button.obs { background: transparent; color: var(--primary); }
button.obs.on { background: var(--primary); color: #fff; }
.row { display: flex; flex-wrap: wrap; }
pre { white-space: pre-wrap; word-break: break-word; font-size: 13px; margin: 8px 0 0; }
textarea { width: 100%; font: 12px/1.4 ui-monospace, monospace; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px; }
code { font-size: 13px; }