.bdc-shell {
  --n-ink: #17211f;
  --n-muted: #66736f;
  --n-paper: #f4efe3;
  --n-panel: #fffaf0;
  --n-line: #d5ccba;
  --n-asphalt: #202827;
  --n-asphalt-soft: #36403e;
  --n-cream: #f7e8b4;
  --n-amber: #f2a93b;
  --n-red: #d44b3f;
  --n-green: #3c8b68;
  --n-blue: #87b9c1;
  --n-shadow: #16211f24;
  --v-stage: #eef3ef;
  --v-sky-soft: #dbe6df;
  --v-road: #4d5956;
  --v-card: #fffaf0;
  --v-ink: #17211f;
  --v-muted: #5d6d68;
  --v-lane: #fff1bd;
  --v-lab: #fffffff2;
  --bdc-reaction-share: 43.4%;
  --bdc-braking-share: 56.6%;
  --bdc-stop-share: 89%;
  --bdc-gap-share: 46%;

  container-type: inline-size;
  color: var(--n-ink);
}

.theme-dark .bdc-shell {
  --n-ink: #edf2e9;
  --n-muted: #aebbb5;
  --n-paper: #121817;
  --n-panel: #1b2422;
  --n-line: #394541;
  --n-asphalt: #080c0c;
  --n-asphalt-soft: #242e2c;
  --n-cream: #f7df96;
  --n-shadow: #0008;
  --v-stage: #202827;
  --v-sky-soft: #36403e;
  --v-road: #303a38;
  --v-card: #202827;
  --v-ink: #f7df96;
  --v-muted: #aebbb5;
  --v-lane: #f7df96;
  --v-lab: #28322fcc;
}

.bdc-dashboard {
  display: grid;
  grid-template-columns: minmax(17rem, 0.75fr) minmax(0, 1.45fr);
  overflow: hidden;
  border: 1px solid var(--n-line);
  border-radius: 1.5rem;
  background: var(--n-paper);
  box-shadow: 0 1.5rem 4rem var(--n-shadow);
}

.bdc-controls {
  display: grid;
  gap: 1.35rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--n-panel);
  border-right: 1px solid var(--n-line);
}

.bdc-toggle-row,
.bdc-choice,
.bdc-slider,
.bdc-surfaces {
  display: grid;
  gap: 0.65rem;
}

.bdc-toggle-row {
  grid-template-columns: 1fr 1fr;
}

.bdc-choice {
  grid-template-columns: repeat(2, 1fr);
}

.bdc-choice > span,
.bdc-surfaces > span {
  grid-column: 1 / -1;
  color: var(--n-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bdc-choice button,
.bdc-surface-grid button {
  min-height: 2.6rem;
  border: 1px solid var(--n-line);
  border-radius: 0.7rem;
  color: var(--n-ink);
  background: var(--n-paper);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 750;
  cursor: pointer;
}

.bdc-choice button[aria-pressed="true"],
.bdc-surface-grid button[aria-pressed="true"] {
  border-color: var(--n-ink);
  color: var(--n-panel);
  background: var(--n-ink);
}

.bdc-slider {
  grid-template-columns: 1fr auto;
  align-items: end;
  color: var(--n-muted);
  font-size: 0.85rem;
}

.bdc-slider strong {
  color: var(--n-ink);
  font-size: 1rem;
}

.bdc-slider input {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--n-amber);
}

.bdc-surface-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.55rem;
}

.bdc-deceleration {
  margin-top: 1rem;
}

.bdc-advanced {
  padding-top: 0.85rem;
  border-top: 1px dashed var(--n-line);
}

.bdc-advanced summary {
  color: var(--n-muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.bdc-visual {
  position: relative;
  display: grid;
  grid-template-rows: auto auto auto auto auto;
  min-height: 38rem;
  overflow: hidden;
  background: var(--v-stage);
  color: var(--v-ink);
}

.bdc-sky {
  position: relative;
  min-height: 13rem;
  background: linear-gradient(180deg, var(--v-stage), var(--v-sky-soft));
}

.bdc-moon {
  position: absolute;
  top: 2rem;
  right: 8%;
  width: 4.5rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--n-amber);
  box-shadow: 0 0 3rem color-mix(in srgb, var(--n-amber) 55%, transparent);
  opacity: 0.88;
}

.bdc-status-lamp {
  position: absolute;
  left: clamp(1rem, 4vw, 3rem);
  top: 2.2rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  max-width: 26rem;
}

.bdc-status-lamp span {
  flex: 0 0 auto;
  width: 0.8rem;
  height: 0.8rem;
  margin-top: 0.28rem;
  border-radius: 50%;
  background: var(--n-amber);
  box-shadow: 0 0 1rem var(--n-amber);
}

.bdc-shell[data-status="normal"] .bdc-status-lamp span {
  background: var(--n-green);
  box-shadow: 0 0 1rem var(--n-green);
}

.bdc-shell[data-status="critical"] .bdc-status-lamp span {
  background: var(--n-red);
  box-shadow: 0 0 1rem var(--n-red);
}

.bdc-status-lamp p {
  margin: 0;
  color: var(--v-ink);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.35;
}

.bdc-road {
  position: relative;
  min-height: 12rem;
  margin: 0 clamp(1rem, 4vw, 3rem);
  border-top: 0.28rem solid var(--v-lane);
  border-bottom: 0.28rem solid var(--v-lane);
  background: repeating-linear-gradient(90deg, transparent 0 8%, var(--v-lane) 8% 12%, transparent 12% 20%) center / 100% 0.24rem no-repeat, var(--v-road);
}

.bdc-road::before {
  content: '';
  position: absolute;
  inset: -6rem 0 auto;
  height: 6rem;
  background: linear-gradient(90deg, transparent, var(--n-amber), transparent);
  clip-path: polygon(0 100%, 50% 0, 100% 100%);
  opacity: 0.13;
}

.bdc-segment {
  position: absolute;
  inset-block: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.25rem;
  min-width: 4rem;
  padding: 1rem;
}

.bdc-reaction {
  left: 0;
  width: var(--bdc-reaction-share);
  background: linear-gradient(90deg, transparent, var(--n-blue));
}

.bdc-braking {
  left: var(--bdc-reaction-share);
  width: var(--bdc-braking-share);
  background: linear-gradient(90deg, var(--n-amber), transparent);
}

.bdc-segment span,
.bdc-road-label,
.bdc-brake-marker span,
.bdc-stop-marker span {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.bdc-segment strong {
  font-size: clamp(1.1rem, 2.5vw, 1.8rem);
}

.bdc-brake-marker,
.bdc-stop-marker {
  position: absolute;
  inset-block: 0;
  z-index: 2;
  width: 0.2rem;
  background: var(--n-red);
}

.bdc-brake-marker {
  left: var(--bdc-reaction-share);
}

.bdc-stop-marker {
  left: var(--bdc-stop-share);
}

.bdc-brake-marker span,
.bdc-stop-marker span {
  position: absolute;
  bottom: calc(100% + 0.6rem);
  left: 50%;
  color: var(--v-ink);
  white-space: nowrap;
  transform: translateX(-50%);
}

.bdc-start {
  position: absolute;
  bottom: calc(100% + 0.6rem);
  left: 0;
  color: var(--v-ink);
}

.bdc-vehicle {
  position: absolute;
  left: 1rem;
  top: 35%;
  width: 4.4rem;
  height: 2rem;
  border-radius: 1.2rem 1.6rem 0.4rem 0.4rem;
  background: var(--n-red);
  box-shadow: 0.7rem 0 1.2rem var(--n-amber);
}

.bdc-lead-vehicle {
  position: absolute;
  z-index: 4;
  left: var(--bdc-gap-share);
  top: 18%;
  width: 4rem;
  height: 1.85rem;
  border-radius: 1.2rem 1.6rem 0.4rem 0.4rem;
  background: var(--n-cream);
  box-shadow: 0 0 1.2rem #f7e8b466;
  transform: translateX(-50%);
}

.bdc-lead-vehicle::before,
.bdc-lead-vehicle::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  width: 0.95rem;
  aspect-ratio: 1;
  border: 0.18rem solid var(--n-line);
  border-radius: 50%;
  background: var(--n-asphalt);
}

.bdc-lead-vehicle::before {
  left: 0.5rem;
}

.bdc-lead-vehicle::after {
  right: 0.5rem;
}

.bdc-lead-vehicle span {
  position: absolute;
  top: calc(100% + 0.65rem);
  left: 50%;
  color: var(--v-lane);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
  transform: translateX(-50%);
}

@container (max-width: 56rem) {
  .bdc-dashboard {
    grid-template-columns: 1fr;
  }

  .bdc-controls {
    border-right: 0;
    border-bottom: 1px solid var(--n-line);
  }
}

.bdc-shell[data-simulating="true"] .bdc-vehicle {
  animation: bdc-stop-run 2.8s cubic-bezier(0.2, 0.75, 0.25, 1) forwards;
}

.bdc-shell[data-simulating="complete"] .bdc-vehicle {
  left: var(--bdc-stop-share);
  transform: translateX(-50%);
}

.bdc-shell:has(.bdc-gap-lab[data-gap-status="insufficient"])[data-simulating="complete"] .bdc-lead-vehicle {
  background: var(--n-red);
  box-shadow: 0 0 2rem var(--n-red);
}

@keyframes bdc-stop-run {
  from {
    left: 1rem;
    transform: translateX(0);
  }

  to {
    left: var(--bdc-stop-share);
    transform: translateX(-50%);
  }
}

.bdc-gap-lab {
  display: grid;
  gap: 0.85rem;
  margin: 1.1rem clamp(1rem, 4vw, 3rem) 0;
  padding: 1rem;
  border: 1px solid color-mix(in srgb, var(--n-amber) 45%, var(--n-line));
  background: var(--v-lab);
}

.bdc-gap-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.bdc-gap-heading > div > span {
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.bdc-gap-heading p {
  max-width: 30rem;
  margin: 0.3rem 0 0;
  color: var(--v-ink);
  font-size: 0.82rem;
  line-height: 1.35;
}

.bdc-gap-heading button {
  flex: 0 0 auto;
  min-height: 2.6rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--v-ink);
  border-radius: 999px;
  color: var(--v-stage);
  background: var(--v-ink);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 850;
  cursor: pointer;
}

.bdc-gap-slider {
  color: var(--v-ink);
}

.bdc-gap-slider strong {
  color: var(--v-ink);
}

.bdc-gap-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.bdc-gap-values div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0.75rem;
  background: color-mix(in srgb, var(--v-stage) 72%, transparent);
}

.bdc-gap-values span {
  color: var(--v-muted);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
}

.bdc-gap-values strong {
  color: var(--v-ink);
}

.bdc-gap-lab[data-gap-status="enough"] {
  border-color: var(--n-green);
}

.bdc-gap-lab[data-gap-status="enough"] .bdc-gap-values div:last-child strong {
  color: #81d6aa;
}

.bdc-gap-lab[data-gap-status="insufficient"] {
  border-color: var(--n-red);
}

.bdc-gap-lab[data-gap-status="insufficient"] .bdc-gap-values div:last-child strong {
  color: #ff8f84;
}

.bdc-gap-hint {
  margin: 0;
  color: var(--v-muted);
  font-size: 0.7rem;
  line-height: 1.35;
}

.bdc-vehicle::before,
.bdc-vehicle::after {
  content: '';
  position: absolute;
  bottom: -0.55rem;
  width: 1.05rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--n-asphalt);
  border: 0.2rem solid var(--n-line);
}

.bdc-vehicle::before {
  left: 0.55rem;
}

.bdc-vehicle::after {
  right: 0.55rem;
}

.bdc-result-ribbon {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: clamp(1rem, 4vw, 3rem);
  background: var(--n-line);
  border: 1px solid var(--n-line);
}

.bdc-result-ribbon div {
  display: grid;
  gap: 0.2rem;
  padding: 1rem;
  background: var(--v-card);
}

.bdc-result-ribbon span {
  color: var(--v-muted);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.bdc-result-ribbon strong {
  color: var(--v-ink);
  font-size: clamp(1.6rem, 4vw, 2.7rem);
}

.bdc-vehicle-note,
.bdc-notice {
  margin: 0 clamp(1rem, 4vw, 3rem) 0.75rem;
  color: var(--v-muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.bdc-notice {
  margin-bottom: 1.5rem;
  color: var(--v-ink);
}

@media (max-width: 800px) {
  .bdc-dashboard {
    grid-template-columns: 1fr;
  }

  .bdc-controls {
    border-right: 0;
    border-bottom: 1px solid var(--n-line);
  }

  .bdc-visual {
    min-height: 34rem;
  }

  .bdc-road {
    margin-inline: 1rem;
  }

  .bdc-gap-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .bdc-gap-values {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bdc-shell[data-simulating="true"] .bdc-vehicle {
    animation-duration: 0.01ms;
  }
}