:root {
  --bg: #0f1419; --panel: #1a212b; --panel2: #222c38; --line: #2d3947;
  --fg: #e6edf3; --muted: #8b98a5; --accent: #3b82f6; --ok: #22c55e;
  --warn: #f59e0b; --bad: #ef4444; --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
a { color: var(--accent); }
button {
  background: var(--panel2); color: var(--fg); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 12px; cursor: pointer; font-size: 13px;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { border-color: var(--bad); color: #fca5a5; }
button.small { padding: 4px 9px; font-size: 12px; }
input, select, textarea {
  background: var(--bg); color: var(--fg); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 9px; font-size: 13px; width: 100%;
}
textarea { font-family: ui-monospace, Menlo, Consolas, monospace; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.muted { color: var(--muted); }
.pill { font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); }
.pill.on { color: var(--ok); border-color: #14532d; background: #052e16; }
.pill.off { color: var(--bad); border-color: #7f1d1d; background: #2a0a0a; }

/* header */
header {
  display: flex; align-items: center; gap: 18px; padding: 12px 20px;
  border-bottom: 1px solid var(--line); background: var(--panel);
  position: sticky; top: 0; z-index: 5;
}
header .brand { font-weight: 700; letter-spacing: .3px; }
nav { display: flex; gap: 6px; margin-left: 12px; }
nav a { padding: 7px 12px; border-radius: 8px; color: var(--muted); cursor: pointer; text-decoration: none; }
nav a.active { background: var(--panel2); color: var(--fg); }
header .spacer { flex: 1; }

main { padding: 20px; max-width: 1200px; margin: 0 auto; }
h2 { margin: 4px 0 14px; font-size: 18px; }
h3 { margin: 18px 0 8px; font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }

.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin-bottom: 14px;
}
.card .title { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.card .title b { font-size: 15px; }
.kv { display: grid; grid-template-columns: 120px 1fr; gap: 6px 12px; }
.kv .k { color: var(--muted); }
.metric { font-size: 26px; font-weight: 700; }
.metric small { font-size: 13px; color: var(--muted); font-weight: 400; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); font-size: 13px; }
th { color: var(--muted); font-weight: 600; }

/* form field */
.field { margin-bottom: 10px; }
.field label { display: block; color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* login */
.login { max-width: 340px; margin: 12vh auto; }

/* toast */
#toast {
  position: fixed; bottom: 18px; right: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 50;
}
.toast {
  background: var(--panel2); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: 8px; padding: 10px 14px; min-width: 220px; box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.toast.bad { border-left-color: var(--bad); }
.toast.ok { border-left-color: var(--ok); }

iframe { width: 100%; height: 78vh; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.warnbox { background: #2a1c05; border: 1px solid #7c5b12; color: #fcd34d; padding: 10px 12px; border-radius: 8px; margin: 10px 0; }

/* A reading in alarm (over/under threshold). */
.metric.alarm { color: var(--bad); }
@keyframes alarmpulse { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
.pill.off { animation: none; }
.metric.alarm + * .pill.off, .title .pill.off { animation: alarmpulse 1.2s ease-in-out infinite; }

/* PWA: respect the notch/safe areas and give the sticky header room. */
header { padding-top: calc(12px + env(safe-area-inset-top)); }
main { padding-bottom: calc(24px + env(safe-area-inset-bottom)); }
nav { margin-left: auto; }

/* ---- KPI dashboard (kpi-dashboard-design) ---- */
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin: 6px 0 4px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.kpi-label { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
.metric-primary { font-size: 2.4rem; font-weight: 700; line-height: 1.1; margin: 2px 0; }
.metric-secondary { font-size: 1.5rem; font-weight: 600; }
.metric-secondary small { font-size: .8rem; color: var(--muted); font-weight: 400; }
.kpi-ctx { color: var(--muted); font-size: 12px; }
/* traffic-light status */
.good { color: var(--ok); }
.warn { color: var(--warn); }
.bad  { color: var(--bad); }
.delta.up { color: var(--warn); }
.delta.down { color: #60a5fa; }
/* active-alarm rows + all-clear */
.alarm-row { border-left: 3px solid var(--bad); }
.okbox { border-left: 3px solid var(--ok); color: var(--ok); }