:root {
  --bg: #f6f7f9; --card: #fff; --fg: #1b1d21; --muted: #6b7280; --line: #e5e7eb;
  --accent: #2563eb; --accent-fg: #fff; --down: #2563eb; --up: #f59e0b;
  --ok: #16a34a; --off: #9ca3af; --err: #dc2626; --warn: #b45309;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --card: #171a20; --fg: #e6e8eb; --muted: #9aa1ac; --line: #2a2f38;
          --accent: #3b82f6; --down: #60a5fa; --up: #fbbf24; --ok: #4ade80; --off: #6b7280;
          --err: #f87171; --warn: #fbbf24; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
main { max-width: 1000px; margin: 0 auto; padding: 20px 16px 48px; }
h1 { font-size: 22px; margin: 0; font-weight: 600; }
h2 { font-size: 16px; margin: 24px 0 10px; font-weight: 600; }
.card h2 { margin-top: 0; }
small, .muted { color: var(--muted); font-size: 13px; }
td small { display: block; }
code { font: 13px ui-monospace, Menlo, monospace; }
.wrap { word-break: break-all; }

.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
       padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.top nav { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.top .brand { font-weight: 700; color: var(--fg); }

.head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.tile, .card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; }
.tile { padding: 12px 14px; }
.tile span { color: var(--muted); font-size: 13px; }
.tile b { display: block; font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; }
.card { margin-bottom: 16px; }
.pad { padding: 16px; }
.scroll { overflow-x: auto; }
.narrow { max-width: 420px; margin: 40px auto; padding: 24px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.grid2 > .card { margin-bottom: 0; }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 10px 12px; text-align: right; white-space: nowrap; border-bottom: 1px solid var(--line); }
th:first-child, td:first-child { text-align: left; }
th { font-size: 12px; font-weight: 500; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
tr:last-child td { border-bottom: 0; }
td.empty { text-align: center; color: var(--muted); padding: 24px; }

.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 8px; vertical-align: 2px; background: var(--muted); }
.dot.on { background: var(--ok); }
.dot.off { background: var(--off); opacity: .5; }

label { display: block; margin-bottom: 12px; font-size: 14px; }
label.check { display: flex; gap: 8px; align-items: center; }
input:not([type=checkbox]), textarea { display: block; width: 100%; margin-top: 4px; padding: 8px 10px; font: inherit;
  color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
textarea { resize: vertical; }
#link { font: 12px ui-monospace, Menlo, monospace; word-break: break-all; }
button, .button { display: inline-block; padding: 8px 14px; font: inherit; font-size: 14px; cursor: pointer;
  color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
button:hover, .button:hover { border-color: var(--muted); text-decoration: none; }
.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.danger { color: var(--err); }
button.danger:not(.link) { border-color: var(--err); }
button.link { border: 0; background: none; padding: 0; color: var(--accent); }
button.link.danger { color: var(--err); }
form.inline { display: inline-flex; gap: 10px; align-items: center; margin: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.banner { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; border: 1px solid; }
.banner.ok { color: var(--ok); border-color: var(--ok); }
.banner.err { color: var(--err); border-color: var(--err); }
.banner.warn { color: var(--warn); border-color: var(--warn); font-size: 13px; }

.config { display: flex; gap: 20px; flex-wrap: wrap; align-items: flex-start; }
.config .grow { flex: 1; min-width: 260px; }
.qr { width: 240px; height: 240px; background: #fff; padding: 8px; border-radius: 8px; image-rendering: pixelated; }

dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
dt { color: var(--muted); font-size: 13px; }
dd { margin: 0; }

.chart { display: block; width: 100%; height: 160px; }
.chart .down { fill: var(--down); }
.chart .up { fill: var(--up); }
.axis { display: grid; grid-template-columns: repeat(30, 1fr); font-size: 10px; color: var(--muted); text-align: center; height: 14px; }
.axis span { white-space: nowrap; overflow: visible; }
.legend { font-size: 12px; color: var(--muted); margin-top: 6px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin: 0 4px 0 10px; vertical-align: -1px; }
.legend i:first-child { margin-left: 0; }
.legend i.down { background: var(--down); }
.legend i.up { background: var(--up); }