/* ============================================================
   PostureCoach — Meeting Pose Monitor
   Visual system: a video-engineering monitor. The camera image is
   the hero; everything around it behaves like instrument chrome,
   quiet and legible, with the state colour as the only loud element.
   ============================================================ */

:root {
  --bg:        #0d1417;
  --bg-deep:   #080d0f;
  --panel:     #121c20;
  --line:      #1f2e34;
  --line-soft: #18242a;
  --text:      #dbe7e6;
  --text-dim:  #7d949b;
  --text-faint:#516268;

  /* State palette — set by script.js on <body> */
  --state-centered: #3fbf8f;
  --state-info:     #5aa7d8;
  --state-adjust:   #e2b444;
  --state-warn:     #e2803c;
  --state-problem:  #d95757;

  --state: var(--text-dim);          /* live state colour */
  --state-ink: #0d1417;

  --unit: 8px;
  --radius: 3px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    radial-gradient(1200px 600px at 20% -10%, #14232a 0%, transparent 70%);
  background-repeat: no-repeat;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }

/* ---------------- Top bar ---------------- */

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: calc(var(--unit) * 3);
  flex-wrap: wrap;
  padding: calc(var(--unit) * 2.5) calc(var(--unit) * 3);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(8,13,15,.9), rgba(8,13,15,0));
}

.brand { display: flex; align-items: baseline; gap: calc(var(--unit) * 1.5); }
.brand h1 { font-size: 21px; }
.brand p { margin: 0; color: var(--text-dim); font-size: 14px; }

.rec {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--text-faint);
  align-self: center;
  transition: background .25s ease, box-shadow .25s ease;
}
.rec.live {
  background: var(--state);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--state) 22%, transparent);
}

.topbar-right { display: flex; align-items: center; gap: calc(var(--unit) * 3); flex-wrap: wrap; }
.privacy { margin: 0; color: var(--text-dim); font-size: 13px; max-width: 42ch; }

.toggle { display: inline-flex; align-items: center; gap: var(--unit); cursor: pointer; font-size: 14px; color: var(--text-dim); }
.toggle input { accent-color: var(--state-centered); width: 16px; height: 16px; }

/* ---------------- Layout ---------------- */

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.85fr);
  gap: calc(var(--unit) * 3);
  padding: calc(var(--unit) * 3);
  align-items: start;
}

.viewfinder-wrap { grid-column: 1; grid-row: 1 / span 2; }
.readouts { grid-column: 2; grid-row: 1 / span 2; }
.session  { grid-column: 1; }
.alerts   { grid-column: 2; }

@media (max-width: 1040px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .viewfinder-wrap, .readouts, .session, .alerts { grid-column: 1; grid-row: auto; }
}

/* ---------------- Viewfinder ---------------- */

.viewfinder {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--bg-deep);
  border: 1px solid var(--line);
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
}

.viewfinder video { display: none; }

.viewfinder canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Corner ticks — framing guides, the way a camera marks a safe area */
.viewfinder::before,
.viewfinder::after {
  content: "";
  position: absolute;
  width: 26px; height: 26px;
  border: 2px solid color-mix(in srgb, var(--state) 55%, transparent);
  pointer-events: none;
  transition: border-color .3s ease;
}
.viewfinder::before { top: 14px; left: 14px; border-right: 0; border-bottom: 0; }
.viewfinder::after  { bottom: 14px; right: 14px; border-left: 0; border-top: 0; }

.osd {
  position: absolute;
  inset: 0;
  padding: calc(var(--unit) * 2);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  pointer-events: none;
}

.osd-top { display: flex; gap: var(--unit); }

.osd-chip {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px;
  padding: 3px 7px;
  border-radius: var(--radius);
  background: rgba(8,13,15,.66);
  color: var(--text-dim);
  backdrop-filter: blur(4px);
}

.osd-state {
  background: linear-gradient(0deg, rgba(8,13,15,.88), rgba(8,13,15,0));
  margin: calc(var(--unit) * -2);
  padding: calc(var(--unit) * 6) calc(var(--unit) * 2.5) calc(var(--unit) * 2);
}

.state-name {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--state);
  text-shadow: 0 2px 18px color-mix(in srgb, var(--state) 30%, transparent);
}

.state-msg { margin: 4px 0 0; color: var(--text); font-size: 15px; }

.viewfinder-empty {
  position: absolute; inset: 0;
  display: grid; place-content: center; text-align: center;
  color: var(--text-faint);
  background: var(--bg-deep);
}
.viewfinder-empty p { margin: 0; font-size: 17px; }
.viewfinder-empty .sub { margin-top: 6px; font-size: 13px; max-width: 34ch; }
.viewfinder-empty[hidden] { display: none; }

/* ---------------- Controls ---------------- */

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--unit);
  margin-top: calc(var(--unit) * 2);
}

.btn {
  font: inherit;
  font-size: 14px;
  padding: 9px 15px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease, color .15s ease;
}
.btn:hover:not(:disabled) { border-color: #2c4048; background: #17242a; }
.btn:focus-visible { outline: 2px solid var(--state-info); outline-offset: 2px; }
.btn:disabled { opacity: .38; cursor: not-allowed; }

.btn.primary { background: var(--state-centered); border-color: var(--state-centered); color: #062018; font-weight: 600; }
.btn.primary:hover:not(:disabled) { background: #4ed2a0; border-color: #4ed2a0; }
.btn.quiet { background: transparent; color: var(--text-dim); }

.notice {
  margin: calc(var(--unit) * 1.5) 0 0;
  min-height: 20px;
  font-size: 14px;
  color: var(--state-adjust);
}

/* ---------------- Panels ---------------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--line);
  padding: calc(var(--unit) * 2.5);
}

.panel h2 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: .02em;
  padding-bottom: var(--unit);
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: calc(var(--unit) * 1.5);
}
.panel h2:not(:first-child) { margin-top: calc(var(--unit) * 3); }

.state-block { margin-bottom: calc(var(--unit) * 2.5); }
.state-block-name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--state);
  letter-spacing: -0.01em;
}
.state-block-msg { margin: 3px 0 0; color: var(--text-dim); font-size: 14px; }

.rows { margin: 0; }
.row {
  display: flex;
  justify-content: space-between;
  gap: var(--unit);
  padding: 7px 0;
  border-bottom: 1px solid var(--line-soft);
}
.row:last-child { border-bottom: 0; }
.row dt { color: var(--text-dim); font-size: 14px; }
.row dd { margin: 0; font-size: 14px; text-align: right; }
.telemetry dd { font-family: "IBM Plex Mono", ui-monospace, monospace; font-variant-numeric: tabular-nums; }

/* ---------------- Score ---------------- */

.score { margin-bottom: calc(var(--unit) * 2.5); }
.score-value {
  margin: 0;
  font-size: 46px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.meter {
  height: 8px;
  background: var(--line-soft);
  border-radius: 99px;
  overflow: hidden;
  margin: calc(var(--unit) * 1.5) 0 var(--unit);
}
.meter-fill {
  height: 100%;
  width: 0%;
  background: var(--state-centered);
  transition: width .5s ease;
}
.score-note { margin: 0; font-size: 13px; color: var(--text-faint); max-width: 56ch; }
.score-note em { font-style: normal; color: var(--text-dim); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.stat { background: var(--panel); padding: calc(var(--unit) * 1.5); }
.stat span {
  display: block;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 19px;
  font-variant-numeric: tabular-nums;
}
.stat label { display: block; margin-top: 2px; font-size: 12px; color: var(--text-dim); }

/* ---------------- Bars ---------------- */

.bars { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.bars li { display: grid; grid-template-columns: 1fr 46px; gap: var(--unit); align-items: center; font-size: 13px; }
.bars-empty { display: block; color: var(--text-faint); }
.bar-label { position: relative; padding: 4px 8px; overflow: hidden; background: var(--line-soft); border-radius: var(--radius); }
.bar-fill { position: absolute; inset: 0 auto 0 0; background: color-mix(in srgb, var(--bar) 34%, transparent); border-left: 2px solid var(--bar); }
.bar-text { position: relative; }
.bar-pct { font-family: "IBM Plex Mono", ui-monospace, monospace; color: var(--text-dim); text-align: right; font-variant-numeric: tabular-nums; }

/* ---------------- Alerts ---------------- */

.alert-list { list-style: none; margin: 0; padding: 0; max-height: 300px; overflow-y: auto; }
.alert-list li {
  display: flex; gap: calc(var(--unit) * 1.5);
  padding: 7px 0 7px 10px;
  border-bottom: 1px solid var(--line-soft);
  border-left: 2px solid var(--bar, var(--line));
  font-size: 14px;
}
.alert-empty { color: var(--text-faint); border-left-color: transparent !important; }
.alert-time { font-family: "IBM Plex Mono", ui-monospace, monospace; color: var(--text-faint); font-size: 13px; }

/* ---------------- Footer ---------------- */

.foot { padding: calc(var(--unit) * 2.5) calc(var(--unit) * 3); border-top: 1px solid var(--line); }
.foot p { margin: 0; color: var(--text-faint); font-size: 13px; max-width: 78ch; }

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