/* Palette taken from shop-floor markings: queue tape, stanchion belts, staff-area
   teal and stop red, on concrete grey. The same colours are drawn on the video. */
:root {
  --concrete: #E6E9E8;
  --paper: #FBFBFA;
  --ink: #1F2A33;
  --ink-2: #51606B;
  --rule: #CDD3D3;
  --tape: #E8B500;      /* queue zones */
  --belt: #2F5BD3;      /* door / counting lines */
  --staff: #11806A;     /* unattended (staff) zones */
  --dwell: #7A5BC7;     /* plain dwell zones */
  --stop: #D2382B;      /* alerts */
  --ok: #1E8A4C;
  --focus: #2F5BD3;
  --radius: 6px;
  --font: "Barlow", system-ui, sans-serif;
  --font-num: "Barlow Semi Condensed", "Barlow", system-ui, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --concrete: #171C20;
    --paper: #20272C;
    --ink: #E8ECEC;
    --ink-2: #A3AFB6;
    --rule: #34404A;
    --belt: #6F93F2;
    --staff: #2DB295;
    --dwell: #A58BEA;
    --stop: #F0625A;
    --ok: #44C07A;
    --focus: #6F93F2;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--concrete);
  color: var(--ink);
  font: 400 15px/1.5 var(--font);
}
a { color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--font-num); font-weight: 600; line-height: 1.15; margin: 0; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1rem; }

/* -- top bar ------------------------------------------------------------------ */
.topbar {
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  padding: 10px 24px; background: var(--paper); border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 10;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  font: 700 1.25rem var(--font-num); color: var(--ink);
}
.brand svg { width: 28px; height: 28px; color: var(--ink); }
nav { display: flex; gap: 4px; }
nav a {
  text-decoration: none; padding: 6px 12px; border-radius: var(--radius);
  font-weight: 500; color: var(--ink-2);
}
nav a:hover { color: var(--ink); }
nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -3px 0 var(--tape); border-radius: 0; }
.privacy-note { margin-left: auto; color: var(--ink-2); font-size: 0.85rem; }

main { padding: 24px; max-width: 1500px; margin: 0 auto; }
main:focus { outline: none; }

.page-head {
  display: flex; align-items: end; justify-content: space-between; gap: 16px;
  flex-wrap: wrap; margin-bottom: 20px;
}
.page-head p { margin: 4px 0 0; color: var(--ink-2); max-width: 70ch; }

/* -- buttons and inputs ------------------------------------------------------- */
button, .button {
  font: 500 0.95rem var(--font); border-radius: var(--radius); cursor: pointer;
  padding: 7px 14px; border: 1px solid var(--rule); background: var(--paper); color: var(--ink);
}
button:hover { border-color: var(--ink-2); }
button:disabled { opacity: 0.5; cursor: default; }
button.primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
button.ghost { background: transparent; }
button.danger { color: var(--stop); }
button[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
input, select {
  font: inherit; color: inherit; background: var(--paper); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 6px 8px; width: 100%;
}
label { display: grid; gap: 4px; font-weight: 500; font-size: 0.9rem; }
.hint { color: var(--ink-2); font-size: 0.85rem; margin: 0; }
.form-error { color: var(--stop); margin: 0; min-height: 1.2em; }

/* -- live view ---------------------------------------------------------------- */
.live-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; }
.cam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(420px, 1fr)); gap: 20px; }
.cam { background: var(--paper); border-radius: var(--radius); overflow: hidden; }
.cam-video { position: relative; aspect-ratio: 16 / 9; background: #0E1215; }
.cam-video img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.cam-video .waiting {
  position: absolute; inset: 0; display: grid; place-items: center; color: #A3AFB6;
}
.cam-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 12px 14px 0; }
.cam-head .branch { color: var(--ink-2); font-size: 0.85rem; }
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--ink-2); }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ink-2); }
.status[data-status="online"]::before { background: var(--ok); }
.status[data-status="reconnecting"]::before, .status[data-status="connecting"]::before { background: var(--tape); }
.status[data-status="offline"]::before { background: var(--stop); }

.readouts { display: flex; flex-wrap: wrap; gap: 6px 22px; padding: 10px 14px 14px; }
.readout { display: grid; min-width: 64px; }
.readout .value { font: 600 2rem/1 var(--font-num); font-variant-numeric: tabular-nums; }
.readout .value small { font-size: 1rem; font-weight: 500; color: var(--ink-2); }
.readout .label { font-size: 0.8rem; color: var(--ink-2); }
.readout { padding-left: 8px; border-left: 4px solid var(--rule); }
.readout[data-kind="line"] { border-color: var(--belt); }
.readout[data-kind="queue"] { border-color: var(--tape); }
.readout[data-kind="unattended"] { border-color: var(--staff); }
.readout[data-kind="dwell"] { border-color: var(--dwell); }
.readout[data-alert="true"] { border-color: var(--stop); }
.readout[data-alert="true"] .value { color: var(--stop); }
.cam-foot { display: flex; flex-wrap: wrap; gap: 2px 16px; padding: 8px 14px; border-top: 1px solid var(--rule); color: var(--ink-2); font-size: 0.8rem; font-variant-numeric: tabular-nums; }

.feed { background: var(--paper); border-radius: var(--radius); padding: 14px; align-self: start; position: sticky; top: 76px; }
.feed ol { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 2px; max-height: 70vh; overflow: auto; }
.feed li { padding: 8px 0 8px 10px; border-left: 3px solid var(--rule); }
.feed li[data-state="start"] { border-color: var(--stop); }
.feed li[data-state="end"] { border-color: var(--ok); }
.feed time { display: block; color: var(--ink-2); font-size: 0.8rem; }
.empty { color: var(--ink-2); padding: 12px 0; }

/* -- zone editor ---------------------------------------------------------------- */
.editor { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 20px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 10px; }
.toolbar .spacer { flex: 1; }
.canvas-wrap { position: relative; background: #0E1215; border-radius: var(--radius); overflow: hidden; }
.canvas-wrap canvas { display: block; width: 100%; height: auto; touch-action: none; }
.canvas-wrap[data-tool="zone"] canvas, .canvas-wrap[data-tool="line"] canvas { cursor: crosshair; }
.tool-hint { color: var(--ink-2); font-size: 0.85rem; margin: 8px 0 0; min-height: 1.4em; }
.inspector { background: var(--paper); border-radius: var(--radius); padding: 16px; display: grid; gap: 14px; align-content: start; }
.shape-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.shape-list button { width: 100%; text-align: left; display: flex; gap: 8px; align-items: center; border-color: transparent; }
.shape-list button[aria-pressed="true"] { background: var(--concrete); color: var(--ink); border-color: var(--rule); }
.swatch { width: 12px; height: 12px; border-radius: 2px; flex: none; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.save-bar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.save-bar .msg { color: var(--ink-2); font-size: 0.85rem; }

/* -- dashboard ------------------------------------------------------------------- */
.filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; }
.filters label { min-width: 160px; }
.charts { display: grid; grid-template-columns: repeat(auto-fill, minmax(460px, 1fr)); gap: 20px; margin-top: 20px; }
.panel { background: var(--paper); border-radius: var(--radius); padding: 16px; }
.panel p.sub { color: var(--ink-2); margin: 2px 0 10px; font-size: 0.85rem; }
.chart-box { position: relative; height: 240px; }
.panel.wide { grid-column: 1 / -1; }
.heatmap img { width: 100%; border-radius: 4px; display: block; }
.table-scroll { max-height: 420px; overflow: auto; }
thead th { position: sticky; top: 0; background: var(--paper); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--rule); }
th { font-weight: 600; color: var(--ink-2); }
td.state-start { color: var(--stop); font-weight: 600; }
td.state-end { color: var(--ok); }

/* -- dialog -------------------------------------------------------------------- */
dialog { border: none; border-radius: var(--radius); padding: 0; background: var(--paper); color: var(--ink); width: min(440px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(15 20 24 / 0.55); }
dialog form { display: grid; gap: 14px; padding: 20px; }
dialog .actions { display: flex; justify-content: end; gap: 8px; }

@media (max-width: 900px) {
  main { padding: 16px; }
  .topbar { padding: 10px 16px; gap: 12px; }
  .privacy-note { display: none; }
  .live-layout, .editor { grid-template-columns: 1fr; }
  .cam-grid, .charts { grid-template-columns: 1fr; }
  .feed { position: static; }
}

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