:root {
  --bg: #0f1419;
  --panel: #171d24;
  --line: #263040;
  --text: #e6edf3;
  --muted: #8b97a6;
  --accent: #4a9eff;
  --ok: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 -apple-system, "Segoe UI", "Noto Sans SC", "PingFang SC", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; font-size: 13px; }
header.top {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding: 10px 14px; background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 700; letter-spacing: .3px; }
.brand span { color: var(--muted); font-weight: 400; font-size: 12px; margin-left: 6px; }
header.top nav { display: flex; gap: 4px; flex: 1 1 auto; flex-wrap: wrap; }
header.top nav a { padding: 6px 10px; border-radius: 6px; color: var(--text); font-size: 14px; }
header.top nav a.on { background: #22303f; color: var(--accent); }
header.top .user { color: var(--muted); font-size: 13px; }
main { max-width: 1040px; margin: 0 auto; padding: 16px 14px 40px; }
main.card { max-width: 420px; margin: 8vh auto; background: var(--panel); padding: 22px;
  border: 1px solid var(--line); border-radius: 10px; }
body.centered { display: block; }
h1 { font-size: 21px; margin: 8px 0 14px; }
h2 { font-size: 16px; margin: 22px 0 8px; color: var(--muted); font-weight: 600; }
form.stack { display: flex; flex-direction: column; gap: 12px; }
form.inline { display: inline-flex; align-items: center; gap: 6px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
input {
  background: #0d1218; border: 1px solid var(--line); color: var(--text);
  padding: 9px 10px; border-radius: 7px; font-size: 15px; width: 100%;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 0; }
button, .button {
  background: var(--accent); color: #06121f; border: 0; padding: 9px 14px; border-radius: 7px;
  font-size: 14px; font-weight: 600; cursor: pointer; display: inline-block;
}
button.ghost, .button.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
button.danger { background: transparent; color: var(--bad); border: 1px solid #5c2320; }
button:disabled { opacity: .45; cursor: not-allowed; }
table { width: 100%; border-collapse: collapse; margin: 6px 0 10px; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; margin: 12px 0; }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: 9px; padding: 12px; display: flex; flex-direction: column; gap: 2px; }
.tile .k { color: var(--muted); font-size: 12px; }
.tile b { font-size: 19px; }
.tile small { color: var(--muted); font-size: 12px; }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 8px 0 12px; }
dl.kv dt { color: var(--muted); font-size: 13px; }
dl.kv dd { margin: 0; overflow-wrap: anywhere; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.alert { padding: 9px 12px; border-radius: 7px; margin: 8px 0; font-size: 14px; }
.alert.bad { background: #2b1416; color: #ffb4ae; border: 1px solid #5c2320; }
.alert.good { background: #10251a; color: #7ee787; border: 1px solid #1f5c33; }
.hint { color: var(--muted); font-size: 13px; }
.muted { color: var(--muted); }
pre.mono { background: #0d1218; border: 1px solid var(--line); padding: 10px; border-radius: 7px;
  overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
ul.codes { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 6px; }
ul.codes code { background: #0d1218; border: 1px solid var(--line); padding: 6px 8px; border-radius: 6px; display: block; text-align: center; letter-spacing: 1px; }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.dot.on { background: var(--ok); } .dot.warn { background: var(--warn); } .dot.off { background: var(--muted); }
details summary { cursor: pointer; color: var(--muted); font-size: 13px; }
footer { text-align: center; color: var(--muted); font-size: 12px; padding: 18px 12px 30px; }
@media (max-width: 560px) {
  th, td { padding: 7px 6px; font-size: 13px; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
  dl.kv { grid-template-columns: 1fr; gap: 2px 0; }
  dl.kv dt { margin-top: 6px; }
  main { padding: 12px 10px 32px; }
}