:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-2: #eef2f8;
  --border: #d8e0ec;
  --ink: #1a2230;
  --ink-muted: #5a6678;
  --accent: #2563a8;
  --accent-ink: #ffffff;
  --good: #1f8a4c;
  --warn: #b9770a;
  --crit: #c23b3b;
  --shadow: 0 1px 3px rgba(16, 32, 56, 0.08), 0 4px 16px rgba(16, 32, 56, 0.06);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220;
    --surface: #131c2e;
    --surface-2: #1b2740;
    --border: #263450;
    --ink: #e6edf7;
    --ink-muted: #93a1b8;
    --accent: #4b9fe1;
    --accent-ink: #0b1220;
    --good: #4ade80;
    --warn: #fbbf24;
    --crit: #f87171;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.35);
  }
}
:root[data-theme="dark"] {
  --bg: #0b1220;
  --surface: #131c2e;
  --surface-2: #1b2740;
  --border: #263450;
  --ink: #e6edf7;
  --ink-muted: #93a1b8;
  --accent: #4b9fe1;
  --accent-ink: #0b1220;
  --good: #4ade80;
  --warn: #fbbf24;
  --crit: #f87171;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.topbar .logo { height: 40px; width: auto; color: var(--ink); }
.topbar .spacer { flex: 1; }
.topbar .who { color: var(--ink-muted); font-size: 14px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 24px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 0 0 12px; letter-spacing: .3px; }
.muted { color: var(--ink-muted); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--ink-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
td.num { font-variant-numeric: tabular-nums; text-align: right; }
.tablewrap { overflow-x: auto; }

.pill { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.pill.good { background: color-mix(in srgb, var(--good) 18%, transparent); color: var(--good); }
.pill.warn { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.pill.crit { background: color-mix(in srgb, var(--crit) 18%, transparent); color: var(--crit); }

label { display: block; font-size: 13px; color: var(--ink-muted); margin: 12px 0 4px; }
input {
  width: 100%; padding: 9px 11px; font-size: 14px;
  background: var(--surface-2); color: var(--ink);
  border: 1px solid var(--border); border-radius: 8px;
}
button {
  margin-top: 16px; padding: 10px 18px; font-size: 14px; font-weight: 600;
  background: var(--accent); color: var(--accent-ink);
  border: none; border-radius: 8px; cursor: pointer;
}
button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--border); }
button.danger { background: var(--crit); color: #fff; }
button:hover { filter: brightness(1.05); }

.login { max-width: 380px; margin: 8vh auto; }
.login .logo { height: 56px; display: block; margin: 0 auto 20px; color: var(--ink); }
.err { color: var(--crit); font-size: 14px; margin-top: 10px; min-height: 18px; }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 8px 16px; font-size: 14px; }
.kv dt { color: var(--ink-muted); }
.kv dd { margin: 0; font-variant-numeric: tabular-nums; }

/* Controls row */
.controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 14px; }
.controls select { width: auto; min-width: 160px; }
.controls label { margin: 0 4px 0 0; }
select {
  padding: 8px 10px; font-size: 14px; background: var(--surface-2); color: var(--ink);
  border: 1px solid var(--border); border-radius: 8px;
}

/* Chart */
.chart { width: 100%; }
.chart svg { width: 100%; height: auto; display: block; overflow: visible; }
.chart .grid line { stroke: var(--border); stroke-width: 1; }
.chart .axis text { fill: var(--ink-muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .band { fill: var(--accent); opacity: 0.14; }
.chart .line { fill: none; stroke: var(--accent); stroke-width: 2; }
.chart .loss { fill: var(--warn); }
.chart .cursor { stroke: var(--ink-muted); stroke-width: 1; stroke-dasharray: 3 3; }
.chart .grid line { stroke: var(--border); stroke-width: 1; }
.chart .eq { stroke: var(--ink-muted); stroke-width: 1; opacity: .5; }
.chart .mk { cursor: pointer; stroke: var(--surface); stroke-width: 1.5; }
.chart .mk:hover { r: 7; }
.chart .endlabel { fill: var(--accent); font-size: 12px; font-weight: 600; }
.chart .anno { stroke: var(--ink-muted); stroke-width: 1; stroke-dasharray: 2 3; opacity: .45; }
.chart .annomk { cursor: pointer; stroke: var(--surface); stroke-width: 1.5; }
.chart .annomk:hover { r: 6; }
.legend { display: flex; gap: 16px; font-size: 12px; color: var(--ink-muted); margin-top: 6px; }
.legend .sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: middle; }
.tooltip {
  position: fixed; pointer-events: none; z-index: 10; background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow);
  padding: 8px 10px; font-size: 12px; font-variant-numeric: tabular-nums; display: none;
}
.tooltip b { display: block; margin-bottom: 4px; }
.sev { text-transform: capitalize; }
.sev-critical, .sev-error { color: var(--crit); font-weight: 600; }
.sev-warning, .sev-notice { color: var(--warn); }
.sev-info, .sev-debug { color: var(--ink-muted); }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.tab {
  padding: 8px 14px; cursor: pointer; border: none; background: transparent; margin: 0;
  color: var(--ink-muted); border-bottom: 2px solid transparent; font-size: 14px; font-weight: 600;
}
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tabpane { display: none; }
.tabpane.active { display: block; }

/* Stat tiles (fleet dashboard) */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; box-shadow: var(--shadow); }
.tile .num { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1; }
.tile .lbl { color: var(--ink-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; margin-top: 4px; }
.tile.good .num { color: var(--good); }
.tile.warn .num { color: var(--warn); }
.tile.crit .num { color: var(--crit); }

/* Availability bar (scorecard) */
.avail { position: relative; height: 18px; background: var(--surface-2); border-radius: 4px; overflow: hidden; min-width: 90px; }
.avail > span { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); border-radius: 4px 0 0 4px; }
.avail.warn > span { background: var(--warn); }
.avail.crit > span { background: var(--crit); }
.avail .pct { position: absolute; right: 6px; top: 0; line-height: 18px; font-size: 11px; font-variant-numeric: tabular-nums; color: var(--ink); }