:root {
  color-scheme: light;
  --bg: #f7f5f0;
  --panel: #ffffff;
  --ink: #1f2522;
  --muted: #68726c;
  --line: #d9ddd6;
  --accent: #0d8b72;
  --accent-dark: #05634f;
  --coral: #d85c45;
  --amber: #b97b16;
  --mint: #dff5ec;
  --shadow: 0 18px 60px rgba(31, 37, 34, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(13, 139, 114, 0.08), transparent 36%),
    linear-gradient(315deg, rgba(216, 92, 69, 0.08), transparent 30%),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
select {
  font: inherit;
}

.app-shell {
  width: min(1480px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 22px 0 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(1.55rem, 3vw, 2.6rem);
  line-height: 1.08;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--muted);
  white-space: nowrap;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #9aa39d;
}

.status-dot.ready {
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(13, 139, 114, 0.14);
}

.status-dot.busy {
  background: var(--amber);
  box-shadow: 0 0 0 5px rgba(185, 123, 22, 0.14);
}

.status-dot.error {
  background: var(--coral);
  box-shadow: 0 0 0 5px rgba(216, 92, 69, 0.14);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 390px);
  gap: 18px;
  align-items: start;
}

.stage-panel,
.control-panel {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(217, 221, 214, 0.9);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.stage-panel {
  overflow: hidden;
}

.camera-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 320px;
  background: #161b18;
  overflow: hidden;
}

#cameraFeed,
#overlayCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

#cameraFeed {
  background: #121614;
}

#overlayCanvas {
  pointer-events: none;
}

.stage-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  color: rgba(255, 255, 255, 0.86);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.04) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.04) 25%, transparent 25%),
    #151916;
  background-size: 28px 28px;
}

.stage-placeholder strong {
  font-size: 1.55rem;
}

.stage-placeholder span {
  color: rgba(255, 255, 255, 0.62);
}

.stage-placeholder.is-hidden {
  display: none;
}

.stage-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.stage-footer span {
  padding: 5px 9px;
  border-radius: 8px;
  background: #f2f4ef;
}

.control-panel {
  display: grid;
  gap: 16px;
  padding: 16px;
}

.control-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    transform 150ms ease,
    border-color 150ms ease,
    background 150ms ease;
}

button svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.primary-button {
  background: var(--accent);
  color: white;
}

.primary-button:hover:not(:disabled) {
  background: var(--accent-dark);
}

.ghost-button {
  background: white;
  color: var(--ink);
  border-color: var(--line);
}

.ghost-button:hover:not(:disabled) {
  border-color: var(--accent);
}

.field {
  display: grid;
  gap: 7px;
}

.field span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

select {
  min-width: 0;
  width: 100%;
  min-height: 42px;
  padding: 0 34px 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
}

select:focus,
button:focus-visible {
  outline: 3px solid rgba(13, 139, 114, 0.22);
  outline-offset: 2px;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.metric-strip > div {
  display: grid;
  gap: 3px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcf9;
}

.metric-value {
  font-size: 1.35rem;
  font-weight: 850;
}

.metric-label {
  color: var(--muted);
  font-size: 0.78rem;
}

.people-section {
  display: grid;
  gap: 10px;
}

.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.section-title h2 {
  font-size: 1rem;
}

.section-title span {
  color: var(--muted);
  font-size: 0.82rem;
}

.people-list {
  display: grid;
  gap: 10px;
  max-height: min(46vh, 470px);
  overflow: auto;
  padding-right: 3px;
}

.empty-state,
.person-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.empty-state {
  padding: 22px 14px;
  color: var(--muted);
  text-align: center;
}

.person-card {
  display: grid;
  gap: 10px;
  padding: 12px;
  border-left: 5px solid var(--person-color, var(--accent));
}

.person-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.person-name {
  font-weight: 800;
}

.person-state {
  padding: 4px 8px;
  border-radius: 8px;
  background: var(--mint);
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 800;
}

.person-state.weak {
  background: #fff4df;
  color: var(--amber);
}

.person-state.waiting {
  background: #eef0ec;
  color: var(--muted);
}

.bpm-row {
  display: flex;
  align-items: end;
  gap: 8px;
}

.bpm-value {
  font-size: 2.1rem;
  line-height: 0.95;
  font-weight: 900;
}

.bpm-unit {
  color: var(--muted);
  font-size: 0.82rem;
  padding-bottom: 4px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  color: var(--muted);
  font-size: 0.78rem;
}

.detail-grid span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ecg-chart {
  width: 100%;
  height: 58px;
  display: block;
}

.ecg-wave {
  filter: drop-shadow(0 0 3px rgba(95, 255, 169, 0.35));
}

.ecg-chart line,
.ecg-chart rect,
.ecg-chart polyline,
.ecg-chart path {
  vector-effect: non-scaling-stroke;
}

.ecg-chart rect {
  stroke: rgba(95, 255, 169, 0.09);
  stroke-width: 1;
}

.notice {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.55;
}

.hidden-canvas {
  display: none;
}

@media (max-width: 1040px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .control-panel {
    grid-template-columns: 1fr 1fr;
  }

  .people-section,
  .notice {
    grid-column: 1 / -1;
  }

  .people-list {
    max-height: none;
  }
}

@media (max-width: 680px) {
  .app-shell {
    width: min(100vw - 20px, 1480px);
    padding-top: 14px;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .camera-stage {
    min-height: 240px;
  }

  .control-panel,
  .field-grid,
  .metric-strip {
    grid-template-columns: 1fr;
  }
}