:root {
  --bg: #f6f7f9; --panel: #ffffff; --text: #1d232b; --muted: #6a7480; --line: #dde2e8;
  --accent: #1f6feb; --ok: #1a7f37; --warn: #9a6700; --bad: #cf222e; --code: #f0f3f6;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1419; --panel: #171d24; --text: #e6edf3; --muted: #8b949e; --line: #2d3540;
    --accent: #4493f8; --ok: #3fb950; --warn: #d29922; --bad: #f85149; --code: #0b1016; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, sans-serif; background: var(--bg); color: var(--text); }
header { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
h1 { font-size: 18px; margin: 0; }
h3 { margin: 4px 0 8px; font-size: 15px; }
.conn { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.pill { padding: 2px 10px; border-radius: 99px; font-size: 13px; border: 1px solid var(--line); }
.pill.on { color: var(--ok); border-color: var(--ok); }
.pill.off { color: var(--muted); }
button, .file { font: inherit; padding: 6px 12px; border-radius: 6px; border: 1px solid var(--line);
  background: var(--panel); color: var(--text); cursor: pointer; }
button:hover:not(:disabled), .file:hover { border-color: var(--accent); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.danger:not(:disabled) { border-color: var(--bad); color: var(--bad); }
.file input { display: none; }
input { font: inherit; padding: 5px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); color: var(--text); }
.tabs { display: flex; gap: 2px; padding: 0 16px; background: var(--panel); border-bottom: 1px solid var(--line); overflow-x: auto; }
.tabs button { border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: none; padding: 10px 12px; }
.tabs button.active { border-bottom-color: var(--accent); color: var(--accent); }
main { padding: 16px; max-width: 1200px; margin: 0 auto; }
.tab { display: none; } .tab.active { display: block; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.grow { flex: 1; min-width: 160px; }
.muted { color: var(--muted); font-size: 13px; }
.banner { padding: 10px 16px; } .banner.error { background: color-mix(in srgb, var(--bad) 15%, transparent); color: var(--bad); }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.tile .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.tile .value { font-size: 24px; font-variant-numeric: tabular-nums; font-weight: 600; }
.tile .sub { color: var(--muted); font-size: 12px; }
.tile.wide { grid-column: span 2; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 0; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; font-variant-numeric: tabular-nums; word-break: break-word; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 16px; }
@media (max-width: 480px) { .cols { grid-template-columns: 1fr; } }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; margin-bottom: 16px; }
.code { background: var(--code); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; overflow: auto;
  font: 12.5px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre; max-height: 420px; margin: 8px 0; }
.console { height: 55vh; max-height: none; }
.console .tx { color: var(--accent); } .console .ack { color: var(--ok); } .console .nak, .console .err { color: var(--bad); }
.console .st { color: var(--muted); }
.grid { width: 100%; border-collapse: collapse; font-size: 13px; margin: 8px 0; }
.grid th, .grid td { border-bottom: 1px solid var(--line); padding: 4px 6px; text-align: left; vertical-align: top; }
.grid td code { word-break: break-all; }
.ok { color: var(--ok); } .bad { color: var(--bad); } .warn { color: var(--warn); }
.steps { list-style: none; padding: 0; margin: 0; }
.checks { list-style: none; padding: 0; margin: 8px 0; }
.checks li { padding: 3px 0; } .checks li::before { content: '…'; display: inline-block; width: 1.4em; }
.checks li.pass::before { content: '✔'; color: var(--ok); } .checks li.fail::before { content: '✖'; color: var(--bad); }
.checks li.warnc::before { content: '⚠'; color: var(--warn); }
.checks .detail { color: var(--muted); font-size: 12.5px; margin-left: 1.4em; display: block; }
progress { width: 100%; height: 14px; margin: 8px 0; }
dialog { border: 1px solid var(--line); border-radius: 10px; background: var(--panel); color: var(--text); max-width: 640px; width: calc(100% - 32px); }
dialog::backdrop { background: rgb(0 0 0 / .4); }
dialog menu { display: flex; justify-content: flex-end; gap: 8px; padding: 0; margin: 16px 0 0; }
.prose code, .prose pre { font-family: ui-monospace, Menlo, monospace; font-size: 13px; }
.prose pre { background: var(--code); padding: 8px 10px; border-radius: 6px; overflow: auto; }