:root {
  --bg: #0f1216;
  --panel: #171c22;
  --panel-2: #1e242c;
  --text: #d8dee6;
  --muted: #7d8896;
  --line: #26303a;
  --accent: #4ea1ff;
  --ok: #37c978;
  --warn: #e0a33a;
  --bad: #e2564a;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; border-bottom: 1px solid var(--line);
  background: var(--panel); position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 600; letter-spacing: .3px; }
.nav a { margin-left: 18px; color: var(--text); }
.nav a.muted, .muted { color: var(--muted); }
.wrap { max-width: 1100px; margin: 0 auto; padding: 20px; }
h1 { font-size: 22px; margin: 4px 0 16px; }
h2 { font-size: 17px; margin: 28px 0 10px; color: var(--muted); font-weight: 500; }
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 10px; padding: 16px; margin-bottom: 14px;
}
.card.empty { color: var(--muted); }
.device-head { display: flex; justify-content: space-between; align-items: center; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-right: 8px; }
.dot.on { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.dot.off { background: var(--bad); }
.meta { display: flex; gap: 16px; color: var(--muted); margin-top: 6px; font-size: 13px; flex-wrap: wrap; }
.caps { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 20px; padding: 1px 9px; font-size: 12px; color: var(--muted);
}
.actions { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.metrics { margin-top: 12px; display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
.metric { background: #0b0e12; border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; }
.metric .k { display: block; color: var(--muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: .04em; }
.metric .v { display: block; font-size: 17px; font-variant-numeric: tabular-nums; margin-top: 2px; }
button {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--line);
  border-radius: 7px; padding: 7px 13px; cursor: pointer; font-size: 14px;
  min-height: 44px;
}
button:hover { border-color: var(--accent); color: #fff; }
button:active { transform: translateY(1px); }
pre.out {
  background: #0b0e12; border: 1px solid var(--line); border-radius: 8px;
  padding: 10px; margin: 12px 0 0; font-size: 12.5px; color: #9fb3c8;
  max-height: 260px; overflow: auto; white-space: pre-wrap; word-break: break-word;
}
.feed { list-style: none; margin: 0; padding: 0; max-height: 320px; overflow: auto; }
.feed li { padding: 6px 0; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.feed li:last-child { border-bottom: none; }
.ts { color: var(--muted); font-variant-numeric: tabular-nums; margin-right: 10px; }
.ev { margin-right: 10px; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 500; }
.mono { font-family: ui-monospace, "SF Mono", Consolas, monospace; font-size: 12.5px; }
.state { padding: 1px 8px; border-radius: 20px; font-size: 12px; background: var(--panel-2); }
.state.done { color: var(--ok); }
.state.failed, .state.timeout { color: var(--bad); }
.state.queued, .state.sent { color: var(--warn); }
.login-body { display: grid; place-items: center; min-height: 100vh; }
.login-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 28px; width: 320px; display: flex; flex-direction: column; gap: 12px;
}
.login-card h1 { margin: 0; font-size: 20px; }
.login-card input {
  background: #0b0e12; border: 1px solid var(--line); border-radius: 7px;
  padding: 9px 11px; color: var(--text); font-size: 14px;
}
.error { color: var(--bad); font-size: 13px; }
code { background: var(--panel-2); padding: 1px 5px; border-radius: 4px; font-size: 12.5px; }

/* --- device page --- */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid2 .card { margin-bottom: 0; }
.card h3 { margin: 0 0 12px; font-size: 16px; }
.small { font-size: 12.5px; }
.file-row { display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--line); }
.file-row:last-of-type { border-bottom: none; }
.btn { display: inline-block; background: var(--panel-2); border: 1px solid var(--line);
  color: var(--text); border-radius: 7px; padding: 10px 13px; min-height: 44px; line-height: 22px; }
.btn:hover { border-color: var(--accent); }
.table-wrap { overflow-x: auto; margin: 0 -2px; }
.qr-box { display: flex; align-items: center; gap: 12px; margin-top: 14px; }
.qr-box img { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; }
.token-box { display: flex; gap: 8px; align-items: center; background: #0b0e12;
  border: 1px solid var(--accent); border-radius: 8px; padding: 10px; margin-bottom: 6px; }
.token-box .mono { word-break: break-all; flex: 1; }
.stack { display: flex; flex-direction: column; gap: 10px; }
.stack label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.stack input { background: #0b0e12; border: 1px solid var(--line); border-radius: 7px;
  padding: 8px 10px; color: var(--text); font-size: 14px; }
.steps details { border-bottom: 1px solid var(--line); padding: 10px 0; }
.steps details:last-child { border-bottom: none; }
.steps summary { cursor: pointer; font-weight: 500; padding: 4px 0; }
.steps summary:hover { color: var(--accent); }
.steps ol, .steps ul { margin: 8px 0 4px; padding-left: 22px; }
.steps li { margin: 4px 0; }
@media (max-width: 760px) { .grid2 { grid-template-columns: 1fr; } }
@media (max-width: 640px) {
  .wrap { padding: 14px; }
  .meta { gap: 8px; }
  th, td { padding: 6px; }
}