:root { color-scheme: light dark; --bg: #f6f7f9; --fg: #1d2330; --muted: #6b7280; --card: #fff; --line: #e3e6eb; --ok: #11823b; --err: #c62828; --accent: #2457d6; }
@media (prefers-color-scheme: dark) { :root { --bg: #14171c; --fg: #e7e9ee; --muted: #9aa3b2; --card: #1d2128; --line: #2c323c; --ok: #4cc27a; --err: #ff6b6b; --accent: #7aa2ff; } }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--fg); }
.top { display: flex; gap: 16px; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--card); }
.top nav { display: flex; gap: 16px; align-items: center; }
.brand { font-weight: 600; }
a { color: var(--accent); }
main { max-width: 760px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin: 16px 0; }
.narrow { max-width: 380px; margin: 48px auto; }
label { display: block; margin: 12px 0; }
input, select { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); font: inherit; }
button { padding: 8px 14px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; font: inherit; cursor: pointer; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button.link { background: none; color: var(--accent); padding: 0; }
button.danger { color: var(--err); }
.row { display: flex; gap: 8px; margin: 6px 0; }
.row input, .row select { flex: 1; }
.inline { display: inline; }
.field { padding: 10px 0; border-top: 1px solid var(--line); }
.field:first-of-type { border-top: 0; }
.field-head { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; }
.label { font-weight: 600; }
.value { font-family: ui-monospace, monospace; }
.muted, .hint { color: var(--muted); font-size: 14px; }
.ok { color: var(--ok); }
.error { color: var(--err); }
.list { list-style: none; padding: 0; margin: 0; }
.list li { padding: 4px 0; }
.list li.alive::before { content: "● "; color: var(--ok); }
.list li.stale::before { content: "● "; color: var(--err); }
.list li.never::before { content: "○ "; color: var(--muted); }