:root {
  color-scheme: dark;
  --bg: #020617;
  --card: #0e1223;
  --muted-bg: #1a1e2f;
  --border: #334155;
  --text: #f8fafc;
  --muted: #94a3b8;
  --green: #22c55e;
  --red: #f87171;
  --red-strong: #ef4444;
  --amber: #fbbf24;
  --on-color: #0f172a;
  --radius: 10px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1, h2 { margin: 0; font-weight: 600; }
h1 { font-size: 22px; }
h2 { font-size: 16px; margin-bottom: 12px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}

.brand, .top-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.page {
  max-width: 1160px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}
.badge.demo { color: var(--amber); border-color: var(--amber); }
.badge.on { color: var(--green); border-color: var(--green); }
.badge.off { color: var(--red); border-color: var(--red); }
.badge.idle { color: var(--muted); }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.stat { display: grid; gap: 2px; }
.stat-label { color: var(--muted); font-size: 14px; }
.stat-value { font-size: 24px; font-weight: 600; font-variant-numeric: tabular-nums; }

.columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; align-items: start; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; }

.btn {
  min-height: 44px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s ease, background-color .15s ease;
}
.btn:hover:not(:disabled) { filter: brightness(1.12); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--green); color: var(--on-color); }
.btn.warn { background: var(--amber); color: var(--on-color); }
.btn.danger { background: var(--red-strong); color: #000; }
.btn.ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn.ghost:hover:not(:disabled) { background: var(--muted-bg); }
.btn.wide { width: 100%; }

:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }

.field { display: grid; gap: 4px; min-width: 0; }
label { font-size: 14px; color: var(--muted); }
input {
  width: 100%;
  min-height: 44px;
  padding: 8px 12px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  font-variant-numeric: tabular-nums;
}

.grid-form { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; align-items: end; }
.grid-form .wide { grid-column: 1 / -1; }
.stack-form { display: grid; gap: 12px; }

.hint { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.error { min-height: 22px; margin: 8px 0; color: var(--red); font-size: 14px; }

.message {
  margin: 0;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--green);
  color: var(--green);
}
.message.bad { border-color: var(--red); color: var(--red); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th { color: var(--muted); font-size: 13px; font-weight: 500; text-align: left; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--muted-bg); white-space: nowrap; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.empty { color: var(--muted); }

.feed { list-style: none; margin: 0; padding: 0; max-height: 340px; overflow-y: auto; }
.feed li { padding: 8px 0; border-bottom: 1px solid var(--muted-bg); font-size: 15px; overflow-wrap: anywhere; }
.feed li:last-child { border-bottom: 0; }
.feed time { display: block; color: var(--muted); font-size: 13px; }

.pos { color: var(--green); }
.neg { color: var(--red); }

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 380px; display: grid; gap: 8px; }
.login-card h1 { margin-bottom: 12px; }

dialog {
  width: min(420px, calc(100vw - 32px));
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
dialog::backdrop { background: rgba(2, 6, 23, .7); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

@media (max-width: 860px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .columns { grid-template-columns: minmax(0, 1fr); }
  .grid-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 420px) {
  .stat-value { font-size: 20px; }
  .actions .btn { width: 100%; }
  .grid-form { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}