.model-showcase {
  background: #eef3f4;
  scroll-margin-top: 92px;
}

.model-showcase .section-heading {
  margin-bottom: 46px;
}

.model-viewer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(310px, .55fr);
  min-height: 580px;
  background: #fff;
  border: 1px solid #d7e0e3;
  box-shadow: 24px 24px 0 rgba(0, 99, 125, .10);
}

.model-stage {
  position: relative;
  min-height: 580px;
  overflow: hidden;
  background-color: #111a1f;
  background-image:
    linear-gradient(rgba(121, 199, 216, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(121, 199, 216, .08) 1px, transparent 1px);
  background-size: 38px 38px;
  touch-action: none;
}

.model-stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 580px;
  cursor: grab;
  outline: none;
}

.model-stage canvas:active { cursor: grabbing; }
.model-stage canvas:focus-visible { outline: 3px solid #79c7d8; outline-offset: -5px; }

.model-status {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 30px;
  background: rgba(17, 26, 31, .76);
  color: #d7eef3;
  text-align: center;
  font-weight: 800;
  transition: opacity .2s ease;
  pointer-events: none;
}

.model-status.hidden { opacity: 0; }

.model-stage-help {
  position: absolute;
  left: 18px;
  bottom: 18px;
  margin: 0;
  padding: 8px 11px;
  background: rgba(17, 26, 31, .82);
  color: #c5dce1;
  font-size: .76rem;
  pointer-events: none;
}

.model-controls {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px 38px;
}

.model-picker {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.model-picker > span {
  display: block;
  margin-bottom: 10px;
  font-size: .82rem;
  font-weight: 800;
}

.model-picker-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.model-picker button {
  min-height: 46px;
  padding: 9px 12px;
  border: 1px solid var(--blue);
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: .84rem;
  font-weight: 800;
  cursor: pointer;
}

.model-picker button.active,
.model-picker button:hover {
  background: var(--blue);
  color: #fff;
}

.model-picker button:focus-visible { outline: 3px solid #79c7d8; outline-offset: 3px; }

.model-controls h3 {
  margin: 0 0 18px;
  font-size: clamp(1.65rem, 2.7vw, 2.5rem);
}

.model-copy > p:not(.kicker) {
  margin: 0 0 34px;
  color: var(--muted);
}

.layer-control {
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.layer-label {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 14px;
  font-weight: 800;
}

.layer-label output {
  color: var(--blue);
  font-variant-numeric: tabular-nums;
}

#layer-slider {
  width: 100%;
  min-height: 36px;
  margin: 0;
  accent-color: var(--blue);
  cursor: pointer;
}

.model-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 22px;
}

.model-actions button {
  min-height: 48px;
  padding: 10px 14px;
  border: 1px solid var(--blue);
  background: var(--blue);
  color: #fff;
  font: inherit;
  font-size: .86rem;
  font-weight: 800;
  cursor: pointer;
}

.model-actions button:last-child {
  background: #fff;
  color: var(--ink);
}

.model-actions button:hover { background: var(--blue-dark); color: #fff; }
.model-actions button:focus-visible { outline: 3px solid #79c7d8; outline-offset: 3px; }

.model-note {
  margin-top: 26px!important;
  font-size: .78rem;
}

.model-check-link {
  width: 100%;
  margin-top: 4px;
  background: #fff;
  color: var(--blue);
}

@media (max-width: 1180px) and (min-width: 921px) {
  .site-header .brand { width: 250px; }
  .site-header nav { gap: 16px; }
  .site-header nav a { font-size: .82rem; }
}

@media (max-width: 920px) {
  .model-showcase { scroll-margin-top: 78px; }
  .model-viewer-layout { grid-template-columns: 1fr; }
  .model-stage, .model-stage canvas { min-height: 500px; }
  .model-controls .layer-control {
    order: -1;
    padding-top: 0;
    padding-bottom: 28px;
    border-top: 0;
    border-bottom: 1px solid var(--line);
  }
  .model-picker { order: -2; }
  .model-copy { margin-top: 30px; }
  .model-copy > p:not(.kicker) { margin-bottom: 0; }
}

@media (max-width: 620px) {
  .model-viewer-layout { box-shadow: 14px 14px 0 rgba(0, 99, 125, .10); }
  .model-stage, .model-stage canvas { min-height: 380px; }
  .model-controls { padding: 22px 24px 34px; }
  .model-actions { grid-template-columns: 1fr; }
  .model-stage-help { left: 10px; right: 10px; bottom: 10px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .model-status { transition: none; }
}