:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --border: #334155;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 14px/1.5 -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.muted { color: var(--muted); }
a { color: var(--accent); }

/* login */
.login-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.login-card {
  background: var(--panel); padding: 32px; border-radius: 12px; width: 320px;
  border: 1px solid var(--border); display: flex; flex-direction: column; gap: 12px;
}
.login-card h1 { margin: 0; font-size: 20px; }
.login-card label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.login-card input { padding: 10px; }
.error { background: rgba(248,113,113,.15); color: var(--err); padding: 8px 10px; border-radius: 6px; }

/* layout */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 24px; background: var(--panel); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 600; }
.topbar-right { display: flex; gap: 16px; align-items: center; }
main { max-width: 1100px; margin: 0 auto; padding: 24px; display: flex; flex-direction: column; gap: 20px; }

.banner { padding: 10px 14px; border-radius: 8px; }
.banner.ok { background: rgba(52,211,153,.15); color: var(--ok); }
.banner.error { background: rgba(248,113,113,.15); color: var(--err); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px;
}
.card h2 { margin: 0 0 14px; font-size: 15px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.card h3 { margin: 22px 0 10px; font-size: 14px; }

.status .big { font-size: 26px; font-weight: 700; margin-bottom: 14px; }
.status-on .big { color: var(--ok); }
.status-off .big { color: var(--muted); }
.status-down .big { color: var(--err); }
.status-idle .big { color: var(--warn); }
.status-detail { font-size: 13px; margin: -10px 0 14px; }
.controls { display: flex; gap: 10px; margin-bottom: 14px; }

.kv { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; margin: 0; font-size: 13px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; text-align: right; }

.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(90px, 1fr)); gap: 12px; }
.metrics div { background: var(--panel2); border-radius: 8px; padding: 12px; text-align: center; font-size: 12px; color: var(--muted); }
.metrics div span { display: block; font-size: 22px; font-weight: 700; color: var(--text); }

/* forms */
.settings .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.settings label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.settings label.full { grid-column: 1 / -1; }
.settings label.checkbox { flex-direction: row; align-items: center; gap: 8px; }
.settings .dur { display: flex; flex-direction: row; align-items: center; gap: 6px; }
.settings .dur input { width: 72px; }
.settings label[hidden] { display: none; }
input, textarea, select, button {
  font: inherit; color: var(--text); background: var(--panel2);
  border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px;
}
textarea.mono, .log { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; }
select[multiple] { padding: 4px; }
button { background: var(--accent); color: #04263a; font-weight: 600; cursor: pointer; border: none; padding: 10px 16px; }
button.secondary { background: var(--panel2); color: var(--text); border: 1px solid var(--border); }
button.link { background: none; border: none; color: var(--accent); padding: 0; font-weight: 400; }
button:disabled { opacity: .4; cursor: not-allowed; }
.settings > button { margin-top: 16px; }

/* alerts */
table.alerts { width: 100%; border-collapse: collapse; font-size: 13px; }
table.alerts th, table.alerts td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--border); }
table.alerts th { color: var(--muted); font-weight: 500; }
tr.sev-error td:nth-child(3) { color: var(--err); }
tr.sev-warn td:nth-child(3) { color: var(--warn); }

/* logs */
.log {
  background: #0b1120; border: 1px solid var(--border); border-radius: 8px;
  height: 280px; overflow-y: auto; padding: 10px; color: #93c5fd;
}
.log .line { white-space: pre-wrap; word-break: break-word; }

@media (max-width: 640px) {
  .settings .grid2 { grid-template-columns: 1fr; }
}