:root {
  color: #eff4f8;
  background: #071018;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --panel: rgba(15, 30, 41, 0.82);
  --panel-strong: #102431;
  --line: rgba(190, 222, 236, 0.14);
  --muted: #8ba0ad;
  --cyan: #3ee7d1;
  --blue: #4a8cff;
  --violet: #be6dff;
  --amber: #ffb454;
  --danger: #ff6f78;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% -20%, rgba(62, 231, 209, 0.14), transparent 38%),
    radial-gradient(circle at 105% 25%, rgba(74, 140, 255, 0.13), transparent 32%),
    #071018;
}

button, input { font: inherit; }

.app-shell {
  width: min(1520px, 100%);
  margin: 0 auto;
  padding: 26px clamp(18px, 3vw, 44px) 22px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.17em;
}

h1 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2.5rem);
  font-weight: 650;
  letter-spacing: -0.04em;
}

.subtitle {
  max-width: 760px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.5;
}

.status-cluster { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

.topbar-actions { display: grid; justify-items: end; gap: 10px; }
.site-nav { display: flex; gap: 5px; padding: 4px; border: 1px solid var(--line); border-radius: 11px; background: rgba(9, 21, 29, .86); }
.site-nav a { padding: 7px 11px; border-radius: 7px; color: #879ca7; font-size: .76rem; font-weight: 720; text-decoration: none; }
.site-nav a:hover { color: #dce8ed; background: rgba(255, 255, 255, .045); }
.site-nav a.active { color: #061512; background: var(--cyan); }
.guide-topbar { align-items: center; }
.guide-page .data-explainer { margin-top: 0; }

.pilot-notice,
.researcher-guide {
  margin-bottom: 14px;
  border: 1px solid rgba(255, 180, 84, .25);
  border-radius: 13px;
  background: rgba(58, 38, 16, .34);
}

.pilot-notice {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 11px 14px;
  color: #d7c3a4;
  font-size: .76rem;
  line-height: 1.45;
}

.pilot-notice strong { flex: 0 0 auto; color: var(--amber); }

.researcher-guide { border-color: var(--line); background: rgba(15, 30, 41, .58); }
.researcher-guide summary { padding: 11px 14px; color: #c9d8df; font-size: .76rem; font-weight: 750; cursor: pointer; }
.researcher-guide[open] summary { border-bottom: 1px solid var(--line); }
.guide-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding: 13px 14px 8px; }
.guide-grid div { display: flex; gap: 8px; color: #9fb2bc; font-size: .7rem; line-height: 1.45; }
.guide-grid b { display: grid; place-items: center; flex: 0 0 22px; height: 22px; border-radius: 50%; color: #041512; background: var(--cyan); }
.researcher-guide > p { margin: 4px 14px 13px; color: #778c97; font-size: .68rem; }

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(9, 21, 29, 0.86);
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.status-pill.ready { color: var(--cyan); border-color: rgba(62, 231, 209, 0.32); }
.status-pill.warning { color: var(--amber); border-color: rgba(255, 180, 84, 0.28); }
.status-pill.recording { color: #fff; background: rgba(255, 79, 92, 0.15); border-color: rgba(255, 111, 120, 0.45); }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.75fr) minmax(340px, 0.82fr);
  gap: 18px;
}

.stage-panel,
.metrics-panel > article,
.metric-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 22px 80px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(16px);
}

.stage-panel { padding: 12px; }

.video-frame {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border-radius: 13px;
  background: #020609;
  isolation: isolate;
}

#webcam,
#overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}

#overlay { z-index: 2; pointer-events: none; }

.camera-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 8px;
  z-index: 3;
  color: var(--muted);
  background: linear-gradient(145deg, #08131a, #020609);
}

.camera-placeholder strong { color: #dce8ee; font-size: 1.05rem; }
.camera-placeholder span:last-child { font-size: 0.86rem; }
.camera-icon { color: var(--cyan); filter: drop-shadow(0 0 18px var(--cyan)); }

.quality-legend {
  position: absolute;
  z-index: 4;
  right: 14px;
  top: 14px;
  display: grid;
  grid-template-columns: auto 9px auto;
  gap: 6px;
  align-items: center;
  padding: 8px 10px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 9px;
  background: rgba(3, 10, 14, 0.68);
  font-size: 0.62rem;
  color: #d9e6ec;
}

.quality-legend i {
  width: 9px;
  height: 58px;
  border-radius: 6px;
  background: linear-gradient(to top, #6526a8, #2c84cf, #35d7b4, #f6e75f);
}

.live-badge {
  position: absolute;
  z-index: 4;
  left: 14px;
  top: 14px;
  display: none;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(5, 12, 17, 0.7);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.live-badge.visible { display: flex; }
.live-badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--danger); box-shadow: 0 0 12px var(--danger); }

.transport {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 15px;
  padding: 13px 4px 4px;
}

.session-fields { display: flex; gap: 10px; flex: 1; }
.session-fields label { color: var(--muted); font-size: 0.69rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.session-fields input {
  display: block;
  width: min(210px, 24vw);
  margin-top: 5px;
  padding: 10px 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  outline: none;
  color: #eff7fa;
  background: #08141c;
}
.session-fields input:focus { border-color: rgba(62, 231, 209, 0.6); box-shadow: 0 0 0 3px rgba(62, 231, 209, 0.08); }

.transport-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

button, .button-link {
  min-height: 40px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #e8f1f5;
  background: #122532;
  font-weight: 750;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

button.primary { color: #031412; background: var(--cyan); border-color: var(--cyan); }
button:hover:not(:disabled), .button-link:hover { filter: brightness(1.08); transform: translateY(-1px); }
button:disabled { opacity: .38; cursor: not-allowed; }

.consent-row {
  display: flex;
  gap: 10px;
  align-items: start;
  margin: 9px 4px 3px;
  color: #9db0ba;
  font-size: 0.75rem;
  line-height: 1.45;
}
.consent-row input { margin-top: 2px; accent-color: var(--cyan); }
.consent-row strong { color: #d8f6f1; }

.field-help {
  margin: 6px 4px 2px;
  color: #6f8590;
  font-size: .67rem;
}

.export-panel {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) auto;
  gap: 9px 14px;
  align-items: center;
  margin: 13px 4px 4px;
  padding: 13px;
  border: 1px solid rgba(62, 231, 209, .24);
  border-radius: 12px;
  background: rgba(62, 231, 209, .055);
}
.export-panel > div:first-child { display: grid; gap: 4px; }
.export-panel strong { color: var(--cyan); font-size: .78rem; }
.export-panel span, .export-panel small { color: #8fa4ae; font-size: .68rem; line-height: 1.45; }
.export-panel small { grid-column: 1 / -1; color: #718690; }
.export-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.export-actions .button-link, .export-actions button { min-height: 36px; padding: 0 11px; font-size: .68rem; }

.metrics-panel { display: flex; flex-direction: column; gap: 12px; }
.metric-card { padding: 14px; }
.primary-metric { padding: 18px !important; }

.metric-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; color: #a9bac3; font-size: 0.69rem; font-weight: 800; letter-spacing: .1em; }
.metric-tag { padding: 4px 7px; border-radius: 999px; color: var(--muted); background: rgba(255,255,255,.05); font-size: .6rem; }
.metric-tag.good { color: var(--cyan); background: rgba(62, 231, 209, 0.1); }
.metric-tag.low { color: var(--amber); background: rgba(255, 180, 84, 0.1); }

.metric-value { display: flex; align-items: baseline; gap: 8px; margin: 7px 0; }
.metric-value strong { font-size: 3.8rem; line-height: 1; font-weight: 500; letter-spacing: -.06em; }
.metric-value span { color: var(--muted); font-size: .72rem; font-weight: 750; }
.primary-metric p { margin: 8px 0 0; color: var(--muted); font-size: .72rem; }

.quality-bar { height: 5px; overflow: hidden; border-radius: 999px; background: #071016; }
.quality-bar i { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--violet), var(--cyan)); transition: width .25s ease; }

.metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.metric-grid .metric-card { min-width: 0; }
.metric-label { display: block; color: var(--muted); font-size: .62rem; font-weight: 800; letter-spacing: .1em; }
.metric-grid strong { display: block; margin: 4px 0 1px; font-size: 1.55rem; font-weight: 550; }
.metric-unit { color: #607580; font-size: .63rem; }

.signal-card { padding: 14px; }
#signal-chart { display: block; width: 100%; height: 112px; margin-top: 8px; border-radius: 9px; background: #08131a; }
.chart-legend { display: flex; gap: 15px; margin-top: 8px; color: var(--muted); font-size: .65rem; }
.chart-legend span { display: flex; align-items: center; gap: 5px; }
.chart-legend i { width: 7px; height: 7px; border-radius: 50%; }
.pulse-dot { background: var(--cyan); }
.gesture-dot { background: var(--violet); }
.voice-dot { background: var(--amber); }

.session-card { display: grid; gap: 9px; padding: 14px; }
.session-card div { display: grid; grid-template-columns: 60px minmax(0, 1fr); gap: 8px; align-items: center; }
.session-card span { color: var(--muted); font-size: .67rem; }
.session-card code, .session-card strong { overflow: hidden; text-overflow: ellipsis; color: #dbe7ec; font-size: .68rem; font-weight: 650; white-space: nowrap; }

.data-explainer {
  margin-top: 22px;
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(10, 23, 32, .82);
  box-shadow: 0 22px 80px rgba(0, 0, 0, .18);
}

.explainer-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  gap: 28px;
  align-items: end;
}

.explainer-heading h2 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  font-weight: 650;
  letter-spacing: -.035em;
}

.explainer-heading > p {
  margin: 0;
  color: #9eb0ba;
  font-size: 1rem;
  line-height: 1.65;
}

.runtime-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.runtime-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #0b1a23;
}

.runtime-card.featured { border-color: rgba(62, 231, 209, .32); background: rgba(35, 102, 96, .12); }
.card-kicker { color: var(--cyan); font-size: .69rem; font-weight: 850; letter-spacing: .11em; }
.runtime-card h3, .storage-grid h3 { margin: 8px 0 7px; font-size: 1rem; }
.runtime-card p, .storage-grid p { margin: 0; color: #a1b2bb; font-size: .94rem; line-height: 1.58; }
.runtime-card small { display: block; margin-top: 10px; color: #718690; font-size: .78rem; line-height: 1.45; }
.runtime-card code, .data-table code { color: #d9f8f3; font-size: .9em; }

.pipeline-strip {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  margin: 16px 0;
  padding: 13px 16px;
  border: 1px solid rgba(74, 140, 255, .18);
  border-radius: 14px;
  background: rgba(74, 140, 255, .055);
}

.pipeline-strip div { display: flex; align-items: center; gap: 10px; min-width: 0; }
.pipeline-strip b { display: grid; place-items: center; flex: 0 0 27px; height: 27px; border-radius: 50%; color: #06151a; background: var(--blue); font-size: .75rem; }
.pipeline-strip span { min-width: 0; color: #879da8; font-size: .76rem; line-height: 1.35; }
.pipeline-strip strong { display: block; color: #d5e1e6; font-size: .8rem; }
.pipeline-strip > i { color: #46616f; font-style: normal; }

.data-details {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #091720;
}

.data-details summary { padding: 15px 17px; color: #dce7ec; font-size: .92rem; font-weight: 780; cursor: pointer; }
.data-details[open] summary { border-bottom: 1px solid var(--line); }
.standards-details { margin-bottom: 16px; }
.data-table-wrap { overflow-x: auto; }
.data-table { width: 100%; min-width: 960px; border-collapse: collapse; text-align: left; }
.data-table th, .data-table td { padding: 12px 14px; border-bottom: 1px solid rgba(190, 222, 236, .09); vertical-align: top; }
.data-table th { color: #8fa5b0; background: rgba(255, 255, 255, .018); font-size: .7rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.data-table td { color: #aab9c1; font-size: .84rem; line-height: 1.52; }
.data-table td:first-child { color: #e3edf1; font-weight: 720; white-space: nowrap; }
.data-table a { color: var(--cyan); text-underline-offset: 2px; }
.data-table tr:last-child td { border-bottom: 0; }

.storage-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 16px; }
.storage-grid article { display: flex; gap: 14px; padding: 16px; border: 1px solid var(--line); border-radius: 14px; background: rgba(15, 30, 41, .62); }
.storage-grid article > span { color: var(--violet); font-size: .72rem; font-weight: 850; letter-spacing: .08em; }
.storage-grid h3 { margin-top: 0; }

.interpretation-note { display: flex; gap: 18px; align-items: flex-start; margin-top: 16px; padding: 16px 18px; border-left: 3px solid var(--amber); border-radius: 0 12px 12px 0; background: rgba(255, 180, 84, .065); }
.interpretation-note strong { flex: 0 0 auto; color: var(--amber); font-size: .86rem; }
.interpretation-note p { margin: 0; color: #a99b87; font-size: .88rem; line-height: 1.55; }

footer { padding: 16px 2px 0; text-align: center; color: #536773; font-size: .66rem; letter-spacing: .06em; }
.hidden, .hidden-canvas { display: none !important; }

@media (max-width: 980px) {
  .workspace { grid-template-columns: 1fr; }
  .video-frame { min-height: min(68vh, 520px); }
  .metrics-panel { display: grid; grid-template-columns: 1fr 1fr; }
  .metric-grid, .session-card { grid-column: span 2; }
  .guide-grid { grid-template-columns: 1fr 1fr; }
  .explainer-heading { grid-template-columns: 1fr; gap: 10px; }
  .runtime-grid { grid-template-columns: 1fr; }
  .pipeline-strip { grid-template-columns: 1fr 1fr; }
  .pipeline-strip > i { display: none; }
}

@media (max-width: 650px) {
  .topbar, .transport { align-items: stretch; flex-direction: column; }
  .topbar-actions { justify-items: stretch; }
  .site-nav { width: 100%; }
  .site-nav a { flex: 1; text-align: center; }
  .status-cluster { justify-content: flex-start; }
  .video-frame { min-height: 430px; }
  .session-fields { display: grid; grid-template-columns: 1fr 1fr; }
  .session-fields input { width: 100%; }
  .transport-actions { justify-content: flex-start; }
  .metrics-panel { display: flex; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .pilot-notice { align-items: flex-start; flex-direction: column; gap: 5px; }
  .guide-grid { grid-template-columns: 1fr; }
  .export-panel { grid-template-columns: 1fr; }
  .export-actions { justify-content: flex-start; }
  .pipeline-strip, .storage-grid { grid-template-columns: 1fr; }
  .interpretation-note { flex-direction: column; gap: 7px; }
}