/* ============================================================== tokens ==
   A laboratory instrument, not a SaaS dashboard: paper-white ink on near
   black, amber for the one thing that carries meaning (your deviation),
   red reserved exclusively for "out of range". Nothing else gets colour.
   ====================================================================== */

:root {
  --bg: #0a0b0d;
  --panel: #0e1013;
  --raised: #14171c;
  --line: #1e2127;
  --line-bright: #2c3037;

  --ink: #e8e6e1;
  --ink-dim: #a5aab1;
  --ink-mute: #6b7078;

  --amber: #e3b23c;
  --green: #5c9c7f;
  --red: #d9524a;

  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --gutter: clamp(16px, 3vw, 34px);
  --radius: 10px;

  --accent: var(--ink);
}

body[data-state="DRIFT"] { --accent: var(--amber); }
body[data-state="ALERT"] { --accent: var(--red); }
body[data-state="LOW_CONFIDENCE"] { --accent: var(--ink-mute); }

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 300;
  letter-spacing: -0.003em;
  -webkit-font-smoothing: antialiased;
}

h1, h2 { font-weight: 500; letter-spacing: -0.018em; margin: 0; }
p { margin: 0; }
a { color: var(--ink-dim); text-decoration: none; border-bottom: 1px solid var(--line-bright); }
a:hover { color: var(--ink); }

.skip {
  position: absolute; left: -9999px; top: 8px;
  background: var(--raised); padding: 8px 14px; border-radius: 6px; z-index: 50;
}
.skip:focus { left: 8px; }

:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; border-radius: 4px; }

#webcam { position: fixed; width: 1px; height: 1px; opacity: 0; pointer-events: none; top: -10px; }

/* ============================================================ masthead == */

.masthead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: clamp(18px, 3vw, 30px) var(--gutter) 18px;
  border-bottom: 1px solid var(--line);
}

.identity { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }

.mark {
  width: 15px; height: 15px; border: 1.5px solid var(--ink); border-radius: 50%;
  position: relative; align-self: center;
}
.mark::after {
  content: ""; position: absolute; inset: 3.5px; border-radius: 50%;
  background: var(--accent); transition: background 400ms ease;
}

.masthead h1 { font-size: 20px; letter-spacing: 0.01em; }

.tagline { color: var(--ink-mute); font-size: 13.5px; }

.signals { display: flex; gap: 18px; align-items: center; font-size: 12px; font-family: var(--mono); }

.signal { display: inline-flex; align-items: center; gap: 7px; color: var(--ink-dim); }
.signal.muted { color: var(--ink-mute); }

.bulb { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-mute); }
#bridge[data-status="on"] .bulb { background: var(--green); }
#bridge[data-status="off"] .bulb { background: var(--red); opacity: 0.7; }

/* ============================================================== banner == */

.banner {
  margin: 0;
  padding: 11px var(--gutter);
  background: color-mix(in srgb, var(--amber) 12%, var(--bg));
  border-bottom: 1px solid color-mix(in srgb, var(--amber) 30%, var(--bg));
  color: var(--amber);
  font-size: 13.5px;
}

/* ========================================================== instrument == */

main { padding: 0 var(--gutter) 60px; }

.instrument {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  grid-template-areas:
    "trace side"
    "readout side";
  gap: 22px 26px;
  padding: 26px 0 34px;
  border-bottom: 1px solid var(--line);
}

/* --- the trace: the one thing on this page allowed to be the hero ------- */

.trace-block { grid-area: trace; }

#trace {
  display: block;
  width: 100%;
  height: clamp(110px, 17vh, 168px);
  background:
    linear-gradient(180deg, rgba(20,23,28,0.5) 0%, rgba(14,16,19,0) 100%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.trace-legend {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 7px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-mute);
}
.band-note { text-align: center; }

/* --- readout ----------------------------------------------------------- */

.readout { grid-area: readout; display: grid; gap: 22px; }

.state-headline {
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--accent);
  transition: color 300ms ease;
}

.state-detail { color: var(--ink-dim); font-size: 14.5px; max-width: 58ch; margin-top: 3px; }

.figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.figure { background: var(--panel); padding: 14px 16px 15px; }

.figure dt {
  font-size: 11px;
  color: var(--ink-mute);
  font-family: var(--mono);
  margin-bottom: 6px;
}

.figure dd { margin: 0; display: flex; align-items: baseline; gap: 5px; flex-wrap: wrap; }

.num {
  font-family: var(--mono);
  font-weight: 300;
  font-size: 34px;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.num.small { font-size: 22px; }
.figure.primary .num { font-size: 46px; color: var(--accent); transition: color 300ms ease; }

.suffix { font-size: 11px; color: var(--ink-mute); font-family: var(--mono); }
.text { font-size: 15px; color: var(--ink); }
.sub { flex-basis: 100%; font-size: 11px; color: var(--ink-mute); font-family: var(--mono); }

/* --- side column ------------------------------------------------------- */

.side { grid-area: side; display: grid; gap: 16px; align-content: start; }

.preview-frame { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
#preview { display: block; width: 100%; height: auto; }
.preview-note { padding: 9px 11px; font-size: 11px; color: var(--ink-mute); border-top: 1px solid var(--line); }

.controls { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  color: var(--ink);
  font-family: inherit;
  font-size: 13px;
  font-weight: 400;
  padding: 9px 12px;
  cursor: pointer;
  transition: background 130ms ease, border-color 130ms ease, opacity 130ms ease;
}
.btn:hover:not(:disabled) { background: var(--raised); border-color: #3a3f47; }
.btn.solid { background: var(--raised); grid-column: 1 / -1; }
.btn.solid:hover { background: #1b1f25; }
.btn.danger:hover { border-color: var(--red); color: var(--red); background: transparent; }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.status { font-size: 12.5px; color: var(--ink-dim); min-height: 2.6em; }
.baseline-line { font-size: 11.5px; color: var(--ink-mute); font-family: var(--mono); }
#baseline-note { color: var(--amber); }

/* ============================================================ overlays == */

.overlay {
  position: fixed; inset: 0; z-index: 30;
  display: none; place-items: center;
  padding: 24px;
  background: rgba(8, 9, 11, 0.9);
  backdrop-filter: blur(8px);
}

.overlay-card {
  width: min(460px, 100%);
  background: var(--panel);
  border: 1px solid var(--line-bright);
  border-radius: 14px;
  padding: 34px 34px 30px;
  text-align: center;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.55);
}
.overlay-card.wide { width: min(540px, 100%); }
:where(.overlay-card) h2 { font-size: 19px; margin-bottom: 7px; }
:where(.overlay-card) p { color: var(--ink-dim); font-size: 14px; }

.overlay-count {
  font-family: var(--mono);
  font-size: 62px;
  font-weight: 300;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  margin-bottom: 14px;
}

/* Compositor-driven, so it keeps moving even when pose inference is hogging
   the main thread on a slow machine. The numeral may stutter; this will not. */
.cal-bar {
  height: 2px; background: var(--line-bright); border-radius: 2px;
  overflow: hidden; margin: 22px 0 4px;
}
.cal-bar span { display: block; height: 100%; width: 0; background: var(--amber); }
.cal-bar.run span { animation: cal-fill var(--cal-duration, 6s) linear forwards; }
@keyframes cal-fill { from { width: 0; } to { width: 100%; } }

@media (prefers-reduced-motion: reduce) {
  .cal-bar.run span { animation: none; width: 100%; opacity: 0.4; }
}

.fine { font-size: 12px; color: var(--ink-mute); margin-top: 14px; max-width: 46ch; margin-inline: auto; }

.fault-list { list-style: none; padding: 0; margin: 20px 0 4px; text-align: left; }
.fault-list li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 9px 0; border-bottom: 1px solid var(--line);
  font-size: 13.5px; color: var(--ink-dim);
}
.fault-list .pct { font-family: var(--mono); color: var(--ink); }

.summary .btn { margin-top: 22px; width: 100%; }

body[data-phase="calibrating"] .calibration,
body[data-phase="ended"] .summary,
body[data-phase="error"] .error { display: grid; }

/* --- phase-driven control visibility ----------------------------------- */

#end, #recalibrate, #snooze { display: none; }
body[data-phase="tracking"] #start,
body[data-phase="tracking"] #calibrate { display: none; }
body[data-phase="tracking"] #end,
body[data-phase="tracking"] #recalibrate,
body[data-phase="tracking"] #snooze { display: block; }
body[data-phase="boot"] #start,
body[data-phase="boot"] #calibrate { opacity: 0.35; pointer-events: none; }

/* ============================================================== panels == */

.panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  align-items: start;      /* panels size to content instead of stretching */
  gap: 18px;
  padding-top: 30px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 21px 22px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.panel header h2 { font-size: 15.5px; }
.panel header p { color: var(--ink-mute); font-size: 12.5px; margin-top: 4px; }

.chart { height: 108px; }
.chart-svg { width: 100%; height: 100%; display: block; }

.empty {
  color: var(--ink-mute); font-size: 12.5px; text-align: center;
  height: 100%; display: grid; place-items: center; margin: 0;
}

.insight {
  font-size: 13px;
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
  padding-top: 13px;
  margin-top: auto;
}

.about p { font-size: 13.5px; color: var(--ink-dim); max-width: 62ch; }
.about .fine { margin-inline: 0; text-align: left; }

/* --- settings ---------------------------------------------------------- */

.field {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; font-size: 13.5px; color: var(--ink-dim);
}
.field.switch { cursor: pointer; justify-content: flex-start; gap: 10px; }
.field input[type="checkbox"] { accent-color: var(--amber); width: 15px; height: 15px; margin: 0; }

.input-row { display: inline-flex; align-items: baseline; gap: 6px; }

.field input[type="number"] {
  width: 68px;
  background: var(--bg);
  border: 1px solid var(--line-bright);
  border-radius: 6px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  padding: 5px 8px;
  text-align: right;
}
.unit { font-family: var(--mono); font-size: 11px; color: var(--ink-mute); }

.field-actions { display: flex; gap: 8px; margin-top: 4px; }
.field-actions .btn { flex: 1; }

.settings .fine { margin-inline: 0; text-align: left; max-width: none; }

/* =============================================================== foot == */

.foot {
  display: flex; gap: 20px; flex-wrap: wrap;
  padding: 20px var(--gutter) 34px;
  border-top: 1px solid var(--line);
  color: var(--ink-mute);
  font-size: 12px;
  font-family: var(--mono);
}

/* ========================================================= responsive == */

@media (max-width: 940px) {
  .instrument {
    grid-template-columns: 1fr;
    grid-template-areas: "trace" "readout" "side";
  }
  .side { grid-template-columns: 1fr; }
  .preview-frame { max-width: 320px; }
}

@media (max-width: 560px) {
  body { font-size: 14.5px; }
  .signals { font-size: 10.5px; gap: 10px; }
  #rate { display: none; }
  .figures { grid-template-columns: 1fr 1fr; }
  .figure.primary { grid-column: 1 / -1; }
  .controls { grid-template-columns: 1fr; }
  .overlay-card { padding: 26px 20px 24px; }
  .trace-legend .band-note { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}