:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #071019;
  color: #e8f0f8;
  font-synthesis: none;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 0%, rgba(42, 109, 152, 0.18), transparent 32rem),
    radial-gradient(circle at 90% 10%, rgba(31, 78, 105, 0.14), transparent 28rem),
    #071019;
}

button, select, input { font: inherit; }

button, select {
  border: 1px solid #2b4052;
  border-radius: 8px;
  background: #101e2a;
  color: #e8f0f8;
}

button {
  padding: 8px 12px;
  cursor: pointer;
}

button:hover { background: #172a39; }
button:disabled { cursor: wait; opacity: 0.55; }

button:focus-visible, select:focus-visible, input:focus-visible {
  outline: 2px solid #66c6ff;
  outline-offset: 2px;
}

.app-shell {
  width: min(1780px, 100%);
  margin: 0 auto;
  padding: 20px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
}

h1 {
  margin: 4px 0 0;
  font-size: clamp(22px, 2.2vw, 34px);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.eyebrow {
  margin: 0;
  color: #7facc8;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
}

.selectors {
  display: flex;
  align-items: end;
  gap: 10px;
  flex-wrap: wrap;
}

label {
  display: grid;
  gap: 5px;
  color: #90a7b8;
  font-size: 12px;
}

select { min-width: 128px; padding: 7px 9px; }
#dataset-select { min-width: 250px; }

.workspace {
  display: grid;
  grid-template-columns: minmax(560px, 1.15fr) minmax(480px, 0.85fr);
  gap: 12px;
}

.panel {
  overflow: hidden;
  border: 1px solid #1e3444;
  border-radius: 12px;
  background: rgba(10, 22, 31, 0.88);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 38px;
  padding: 0 12px;
  border-bottom: 1px solid #1e3444;
  color: #adc0ce;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.router-status { display: inline-flex; align-items: center; gap: 12px; }
#phase-label { padding: 3px 7px; border-radius: 999px; color: #071019; font-size: 9px; letter-spacing: 0.12em; }
#phase-label[data-phase="async"] { background: #38e891; }
#phase-label[data-phase="sync"] { background: #9b87f5; }
#phase-label[data-phase="none"] { background: #6f8798; }

.model-panel {
  display: grid;
  grid-template-rows: auto minmax(540px, 72vh) auto;
}

#scene {
  min-height: 440px;
  cursor: grab;
  background: linear-gradient(180deg, #0c1822, #09131c);
}

#scene:active { cursor: grabbing; }
#scene canvas { display: block; width: 100%; height: 100%; }

.arm-legend {
  display: flex;
  gap: 18px;
  align-items: center;
  min-height: 38px;
  padding: 0 12px;
  color: #a9bcc9;
  font-size: 12px;
}

.arm-legend span { display: inline-flex; align-items: center; gap: 6px; }
.arm-legend i { width: 9px; height: 9px; border-radius: 50%; }
.left-arm { background: #4d9fe8; }
.right-arm { background: #ed883f; }
.base-body { background: #a7b4bd; }
.async-gate { background: #38e891; }
.sync-gate { background: #9b87f5; }
.arm-legend .hint { margin-left: auto; color: #657f92; }

.video-panel {
  display: grid;
  grid-template-rows: auto minmax(480px, 1fr) auto;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: minmax(0, 2fr) minmax(0, 1fr);
  gap: 2px;
  min-height: 0;
  background: #1e3444;
}

.camera-view {
  position: relative;
  min-width: 0;
  min-height: 0;
  margin: 0;
  background: #02070a;
}

.camera-view.head-camera { grid-column: 1 / -1; }

.camera-view figcaption {
  position: absolute;
  z-index: 1;
  top: 8px;
  left: 9px;
  padding: 4px 6px;
  border-radius: 4px;
  background: rgba(2, 7, 10, 0.72);
  color: #c1d3df;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.camera-view video {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: contain;
  background: #02070a;
}

.sync-state {
  color: #63d4a3;
  font-size: 9px;
  letter-spacing: 0.14em;
}

.attributes {
  min-height: 38px;
  padding: 10px 12px;
  color: #7890a1;
  font-size: 10px;
  overflow-wrap: anywhere;
}

.annotation-panel {
  margin-top: 12px;
}

.annotation-body {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(440px, 0.96fr);
  gap: 18px;
  padding: 14px;
}

.annotation-context,
.annotation-timeline-area {
  min-width: 0;
}

.annotation-role-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 10px;
}

.annotation-chip {
  padding: 4px 8px;
  border: 1px solid #2a4558;
  border-radius: 999px;
  background: #0b1a25;
  color: #9db4c4;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
}

#annotation-split[data-split="train"] {
  border-color: #2d755b;
  color: #63d4a3;
}

#annotation-split[data-split="heldout"] {
  border-color: #8c7040;
  color: #ffd166;
}

.annotation-current-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.annotation-target-card,
.annotation-arm-card {
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid #243d4e;
  border-radius: 9px;
  background: #091721;
}

.annotation-target-card {
  grid-column: 1 / -1;
  min-height: 88px;
  border-top: 2px solid #63d4a3;
  background: #0b1c20;
}

.left-semantic-card {
  box-shadow: inset 3px 0 #4d9fe8;
}

.right-semantic-card {
  box-shadow: inset 3px 0 #ed883f;
}

.annotation-card-kicker {
  margin: 0 0 6px;
  color: #68869a;
  font: 9px ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.13em;
}

.annotation-semantic-key {
  margin: 0 0 7px;
  font: 600 10px ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.04em;
}

.annotation-source-index {
  margin: -2px 0 7px;
  color: #7e9aac;
  font-size: 9px;
}

.activity-relation {
  margin: 8px 0 0;
  color: #8fd8bd;
  font-size: 10px;
  letter-spacing: 0.06em;
}

.annotation-target-text,
.annotation-arm-card p:last-child {
  margin: 0;
  color: #e4edf4;
  font-size: 14px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.annotation-target-text {
  color: #f0f7f3;
  font-size: 15px;
}

.annotation-arm-card p:last-child {
  color: #b8cbd8;
  font-size: 12px;
}

.annotation-provenance {
  margin: 10px 1px 0;
  color: #607d91;
  font-size: 9px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.annotation-timeline {
  --annotation-progress: 0%;
  display: grid;
  gap: 8px;
  padding: 5px 0 9px;
}

.annotation-lane {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.annotation-lane-label {
  color: #7896aa;
  font-size: 9px;
  letter-spacing: 0.06em;
}

.annotation-track {
  position: relative;
  height: 34px;
  overflow: hidden;
  border: 1px solid #284153;
  border-radius: 6px;
  background: #06111a;
}

.annotation-track::after {
  content: "";
  position: absolute;
  z-index: 4;
  top: 0;
  bottom: 0;
  left: var(--annotation-progress);
  width: 1px;
  background: #ffffff;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.75);
  pointer-events: none;
}

.annotation-block {
  position: absolute;
  top: 2px;
  height: 28px;
  min-width: 3px;
  overflow: hidden;
  padding: 0 5px;
  border: 0;
  border-radius: 3px;
  color: #06111a;
  font-size: 9px;
  font-weight: 700;
  line-height: 28px;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0.78;
}

.annotation-block:hover,
.annotation-block.active {
  z-index: 3;
  opacity: 1;
  filter: brightness(1.12);
}

.annotation-block.active {
  outline: 2px solid #ffffff;
  outline-offset: -2px;
}

.annotation-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 12px;
  color: #8ca5b6;
  font-size: 10px;
}

.annotation-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.annotation-legend i {
  width: 8px;
  height: 8px;
  border-radius: 2px;
}

.annotation-note {
  margin: 10px 0 0;
  color: #617f93;
  font-size: 10px;
  line-height: 1.5;
}

.transport {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
  padding: 12px;
}

.play-button {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 50%;
  background: #d8edf9;
  color: #071019;
  font-size: 16px;
}

.play-button:hover { background: #ffffff; }

.timeline-wrap {
  position: relative;
  display: grid;
  flex: 1;
  gap: 8px;
  min-width: 180px;
}

.timeline-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: #829aac;
  font-size: 11px;
}

#timeline { width: 100%; accent-color: #63bdf1; }

#router-markers { position: absolute; inset: 29px 8px auto 8px; height: 18px; pointer-events: none; }
#router-markers span { position: absolute; bottom: 0; transform: translateX(-50%); color: #ffd166; font: 8px ui-monospace, monospace; white-space: nowrap; }
#router-markers span::after { content: ""; position: absolute; top: 11px; left: 50%; width: 1px; height: 12px; background: #ffd166; opacity: 0.75; }

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-variant-numeric: tabular-nums;
}

.rate-control { min-width: 80px; }

#status {
  min-width: 92px;
  color: #63d4a3;
  font-size: 11px;
  text-align: right;
}

@media (max-width: 1100px) {
  .workspace { grid-template-columns: 1fr; }
  .annotation-body { grid-template-columns: 1fr; }
  .model-panel { grid-template-rows: auto minmax(460px, 60vh) auto; }
  .video-panel { grid-template-rows: auto minmax(420px, 60vw) auto; }
}

@media (max-width: 700px) {
  .app-shell { padding: 10px; }
  .topbar { align-items: start; flex-direction: column; }
  .workspace { grid-template-columns: minmax(0, 1fr); }
  .model-panel { grid-template-rows: auto 430px auto; }
  .video-panel { grid-template-rows: auto auto auto; }
  .video-grid { grid-template-rows: auto auto; }
  .camera-view video { aspect-ratio: 4 / 3; }
  .transport { align-items: end; flex-wrap: wrap; }
  .timeline-wrap { order: 3; flex-basis: 100%; }
  .timeline-meta { align-items: start; flex-direction: column; gap: 3px; }
  .arm-legend .hint { display: none; }
  #dataset-select { min-width: 210px; }
  #status { margin-left: auto; }
  .annotation-body { padding: 10px; }
  .annotation-current-grid { grid-template-columns: 1fr; }
  .annotation-lane { grid-template-columns: 1fr; gap: 3px; }
  .annotation-track { height: 30px; }
  .annotation-block { height: 24px; line-height: 24px; }
}