:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f3f2ee;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
  --series-1-soft: rgba(42, 120, 214, 0.14);
  --good: #0ca30c;
  --good-ink: #006300;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #242423;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
    --series-1-soft: rgba(57, 135, 229, 0.18);
    --good-ink: #0ca30c;
    --shadow: none;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #242423;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --series-1-soft: rgba(57, 135, 229, 0.18);
  --good-ink: #0ca30c;
  --shadow: none;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 14px/1.45 var(--font);
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }

/* ---------- layout ---------- */
.app { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh;
  background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 16px 12px; gap: 4px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 18px; font-weight: 700; font-size: 17px; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; font-size: 15px;
}
.brand small { display: block; font-weight: 500; font-size: 11px; color: var(--muted); }
.nav-btn {
  display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 10px; border: 0; border-radius: 8px;
  background: none; cursor: pointer; text-align: left; color: var(--ink-2);
}
.nav-btn:hover { background: var(--surface-2); color: var(--ink); }
.nav-btn.active { background: var(--series-1-soft); color: var(--ink); font-weight: 600; }
.nav-btn svg { width: 18px; height: 18px; flex: none; }
.nav-badge {
  margin-left: auto; background: var(--critical); color: #fff; font-size: 11px; font-weight: 700;
  border-radius: 999px; padding: 0 7px; line-height: 18px;
}
.sidebar-foot { margin-top: auto; display: flex; flex-direction: column; gap: 8px; padding: 8px; color: var(--muted); font-size: 12px; }
.live-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--muted); margin-right: 6px; }
.live-dot.on { background: var(--good); box-shadow: 0 0 0 3px rgba(12, 163, 12, 0.2); }

main { padding: 20px 24px 40px; min-width: 0; }
.view { display: none; }
.view.active { display: block; }
.view-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.view-head h1 { margin: 0; font-size: 22px; letter-spacing: -0.01em; }
.view-head p { margin: 2px 0 0; color: var(--ink-2); }

.grid { display: grid; gap: 16px; }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3-1 { grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 16px; min-width: 0;
}
.card h2 { margin: 0 0 2px; font-size: 15px; }
.card .sub { margin: 0 0 12px; color: var(--muted); font-size: 12.5px; }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }

/* ---------- KPI tiles ---------- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; box-shadow: var(--shadow); }
.kpi .label { color: var(--ink-2); font-size: 12px; }
.kpi .value { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; margin-top: 2px; }
.kpi .note { color: var(--muted); font-size: 12px; }
.kpi.alert .value { color: var(--critical); }

/* ---------- map ---------- */
.map { height: 520px; border-radius: 8px; overflow: hidden; background: var(--surface-2); }
.map.small { height: 300px; }
.leaflet-container { font: inherit; background: var(--surface-2); }
/* Dark basemap: OSM tiles inverted, hue-restored and dimmed. */
:root[data-theme="dark"] .leaflet-tile-pane { filter: invert(1) hue-rotate(180deg) brightness(0.9) contrast(0.85) saturate(0.6); }
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) .leaflet-tile-pane { filter: invert(1) hue-rotate(180deg) brightness(0.9) contrast(0.85) saturate(0.6); }
}
.veh-icon { display: grid; place-items: center; }
.veh-icon .dot {
  width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--surface);
  display: grid; place-items: center; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}
.veh-icon svg { width: 12px; height: 12px; fill: #fff; }
.map-legend { display: flex; gap: 14px; flex-wrap: wrap; color: var(--ink-2); font-size: 12px; margin-top: 8px; }
.swatch { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 5px; vertical-align: -1px; }
.leaflet-popup-content-wrapper, .leaflet-popup-tip { background: var(--surface); color: var(--ink); }
.leaflet-tooltip { background: var(--surface); color: var(--ink); border-color: var(--border); }

/* ---------- lists / tables ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; font-weight: 600; color: var(--ink-2); font-size: 12px; padding: 8px 10px; border-bottom: 1px solid var(--grid); white-space: nowrap; }
td { padding: 9px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.clickable { cursor: pointer; }
#vehicleTable td:first-child { min-width: 170px; }
tr.clickable:hover td { background: var(--surface-2); }

.pill { display: inline-flex; align-items: center; gap: 5px; border-radius: 999px; padding: 1px 9px; font-size: 12px; font-weight: 600; background: var(--surface-2); color: var(--ink-2); white-space: nowrap; }
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.pill.good::before { background: var(--good); }
.pill.warning::before { background: var(--warning); }
.pill.serious::before { background: var(--serious); }
.pill.critical::before { background: var(--critical); }
.pill.info::before { background: var(--series-1); }

.bar { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; min-width: 70px; }
.bar > span { display: block; height: 100%; border-radius: 3px; background: var(--series-1); }
.bar.low > span { background: var(--critical); }
.bar.mid > span { background: var(--warning); }

.feed { list-style: none; margin: 0; padding: 0; max-height: 520px; overflow: auto; }
.feed li { display: grid; grid-template-columns: 18px 1fr; gap: 8px; padding: 9px 2px; border-bottom: 1px solid var(--grid); }
.feed li:last-child { border-bottom: 0; }
.feed .icon { font-size: 14px; line-height: 20px; text-align: center; }
.feed .meta { color: var(--muted); font-size: 12px; }
.feed li.new { animation: flash 1.6s ease-out; }
@keyframes flash { from { background: var(--series-1-soft); } to { background: transparent; } }

.insight { display: grid; grid-template-columns: 22px 1fr; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--grid); }
.insight:last-child { border-bottom: 0; }
.insight .title { font-weight: 600; }
.insight .detail { color: var(--ink-2); font-size: 13px; }
.sev-icon { width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font-size: 12px; font-weight: 800; color: #fff; }
.sev-icon.critical { background: var(--critical); }
.sev-icon.warning { background: var(--warning); color: #0b0b0b; }
.sev-icon.info { background: var(--series-1); }

/* ---------- forms / buttons ---------- */
.btn {
  border: 1px solid var(--border); background: var(--surface); border-radius: 8px; padding: 7px 12px;
  cursor: pointer; font-weight: 600; font-size: 13px;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.sm { padding: 3px 9px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: default; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
label.field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--ink-2); }
input, select, textarea {
  background: var(--page); border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.segmented button { border: 0; background: var(--surface); padding: 6px 12px; cursor: pointer; font-size: 13px; color: var(--ink-2); }
.segmented button.active { background: var(--series-1-soft); color: var(--ink); font-weight: 600; }

.result { margin-top: 12px; padding: 12px; border-radius: 8px; background: var(--surface-2); }
.result.flagged { outline: 2px solid var(--critical); }
.muted { color: var(--muted); }
.reasons { margin: 6px 0 0; padding-left: 18px; color: var(--ink-2); }

/* ---------- maintenance cards ---------- */
.m-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
.m-card h3 { margin: 0; font-size: 14px; }
.risk-num { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; }
.factors { display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; align-items: center; margin: 10px 0; font-size: 12px; color: var(--ink-2); }
.m-card ul { margin: 6px 0 0; padding-left: 18px; font-size: 13px; }

/* ---------- chat ---------- */
.chat { display: flex; flex-direction: column; height: calc(100vh - 130px); min-height: 420px; }
.chat-log { flex: 1; overflow: auto; display: flex; flex-direction: column; gap: 12px; padding: 4px 4px 12px; }
.msg { max-width: 820px; padding: 10px 14px; border-radius: 12px; }
.msg.user { align-self: flex-end; background: var(--accent); color: var(--accent-ink); }
.msg.bot { align-self: flex-start; background: var(--surface); border: 1px solid var(--border); }
.msg.bot table { margin: 6px 0; }
.msg p { margin: 0 0 8px; }
.msg p:last-child { margin: 0; }
.msg ul { margin: 4px 0 8px; padding-left: 20px; }
.msg .tools { margin-top: 8px; color: var(--muted); font-size: 12px; }
.chat-input { display: flex; gap: 8px; border-top: 1px solid var(--border); padding-top: 12px; }
.chat-input textarea { resize: none; height: 46px; }
.suggestions { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.typing::after { content: "..."; animation: dots 1.2s steps(3, end) infinite; display: inline-block; overflow: hidden; width: 0; vertical-align: bottom; }
@keyframes dots { to { width: 1.1em; } }

/* ---------- drawer ---------- */
.drawer-bg { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.35); display: none; z-index: 1000; }
.drawer-bg.open { display: block; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(760px, 100vw); background: var(--page);
  border-left: 1px solid var(--border); z-index: 1001; overflow: auto; padding: 20px;
  transform: translateX(100%); transition: transform 0.2s ease;
}
.drawer.open { transform: none; }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin: 12px 0; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.stat .label { font-size: 11px; color: var(--muted); }
.stat .value { font-weight: 700; font-size: 16px; }

.chart-box { position: relative; height: 260px; }
.chart-box.tall { height: 320px; }
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }
.empty { color: var(--muted); padding: 20px 0; text-align: center; }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .cols-3-1, .cols-2 { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: sticky; height: auto; flex-direction: row; overflow-x: auto; padding: 8px; z-index: 900; border-right: 0; border-bottom: 1px solid var(--border); }
  .brand small, .sidebar-foot, .nav-btn span.label { display: none; }
  .brand { padding: 4px 8px; }
  .nav-btn { width: auto; }
  main { padding: 16px; }
  .map { height: 380px; }
  .form-grid { grid-template-columns: 1fr; }
  .chat { height: calc(100vh - 160px); }
}
#view-fleet > .card { margin-bottom: 18px; }
#view-fleet details { margin: 16px 0; }
#view-fleet summary { cursor: pointer; font-weight: 600; padding: 8px 0; }
#view-fleet .form-grid { margin: 12px 0; }
#view-fleet label { display: flex; flex-direction: column; gap: 6px; }
#view-fleet label:has(input[type=checkbox]) { flex-direction: row; }
#view-fleet pre { white-space: pre-wrap; overflow-wrap: anywhere; padding: 16px; background: var(--surface-2); }
.fleet-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }