.product-viewer {
  height: 520px;
  background: #e9eef2;
  color: #0b1d33;
  display: grid;
  grid-template-rows: 52px 1fr 58px;
  overflow: hidden;
  user-select: none;
}
.viewer-top,
.viewer-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid #ced8df;
  text-transform: uppercase;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.viewer-top span {
  display: flex;
  align-items: center;
  gap: 9px;
}
.viewer-top i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #f47b20;
  box-shadow: 0 0 0 4px #f47b2020;
}
.viewer-top b {
  color: #607083;
}
.viewer-scene {
  position: relative;
  display: grid;
  place-items: center;
  perspective: 900px;
  cursor: grab;
  touch-action: none;
  outline: 0;
  background: radial-gradient(
    circle at 52% 42%,
    #fff 0,
    #edf2f5 45%,
    #dfe7ec 100%
  );
}
.viewer-scene:active {
  cursor: grabbing;
}
.viewer-scene:focus-visible {
  box-shadow: inset 0 0 0 3px #f47b20;
}
.model-stage {
  width: 360px;
  height: 250px;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateX(-8deg) rotateY(-18deg);
  transition: transform 0.08s linear;
}
.model-stage.dragging {
  transition: none;
}
.product-photo {
  position: absolute;
  inset: 24px;
  width: calc(100% - 48px);
  height: calc(100% - 48px);
  object-fit: contain;
  filter: drop-shadow(0 24px 22px #20303b2b);
}
.photo-only .viewer-scene {
  cursor: default;
  background: transparent;
}
.photo-only {
  background: transparent;
  grid-template-rows: 1fr;
}
.photo-only .viewer-top,
.photo-only .viewer-controls,
.photo-only .viewer-modes,
.photo-only #view-angle,
.photo-only .viewer-hint,
.photo-only .model-stage {
  display: none;
}
.photo-only .product-photo {
  inset: 0;
  width: 100%;
  height: 100%;
  filter: none;
}
.viewer-scene.photo-mode .model-stage,
.viewer-scene.photo-mode .viewer-hint {
  visibility: hidden;
}
.viewer-scene.model-mode .product-photo {
  display: none;
}
.viewer-modes {
  display: flex;
  margin-left: auto;
  margin-right: 16px;
  border: 1px solid #c5d0d8;
}
.viewer-modes[hidden] {
  display: none;
}
.viewer-modes button {
  border: 0;
  background: transparent;
  color: #5d6e80;
  padding: 7px 10px;
  font: inherit;
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
  cursor: pointer;
}
.viewer-modes button.active {
  background: #0a203b;
  color: white;
}
.viewer-hint {
  position: absolute;
  bottom: 18px;
  color: #607083;
  text-transform: uppercase;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.1em;
  display: flex;
  gap: 8px;
  align-items: center;
}
.viewer-hint span {
  font-size: 18px;
  color: #f47b20;
}
.viewer-controls {
  border-top: 1px solid #ced8df;
  border-bottom: 0;
  justify-content: flex-start;
  gap: 8px;
}
.viewer-controls button {
  border: 1px solid #bfcbd4;
  background: white;
  color: #0b1d33;
  padding: 10px 13px;
  font: inherit;
  text-transform: uppercase;
  cursor: pointer;
}
.viewer-controls button:hover {
  border-color: #f47b20;
}
.viewer-controls button span {
  color: #f47b20;
  margin-right: 5px;
}
.viewer-controls > span {
  margin-left: auto;
  color: #7b8997;
}
.gland-model {
  width: 350px;
  height: 180px;
  position: absolute;
  left: 5px;
  top: 35px;
  transform-style: preserve-3d;
  filter: drop-shadow(0 35px 24px #20303b40);
}
.cylinder {
  position: absolute;
  top: 50%;
  transform-style: preserve-3d;
  transform: translateY(-50%);
}
.cylinder .panel {
  position: absolute;
  left: 0;
  top: 50%;
  height: var(--face-h);
  width: var(--w);
  margin-top: calc(var(--face-h) / -2);
  background: linear-gradient(
    90deg,
    #555f64,
    #eef1f2 28%,
    #889298 56%,
    #f2f4f5 78%,
    #555f64
  );
  border-left: 1px solid #3c464b55;
  border-right: 1px solid #fff7;
  backface-visibility: visible;
}
.cylinder.dark .panel {
  background: linear-gradient(
    90deg,
    #29343a,
    #9aa2a6 32%,
    #3f4a50 65%,
    #b9bec1
  );
}
.cylinder.thread .panel {
  background: repeating-linear-gradient(
    90deg,
    #4e585e 0 5px,
    #e8ebec 6px 10px,
    #747e83 11px 15px
  );
}
.gland-core {
  position: absolute;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: #17222a;
  right: -18px;
  top: 62px;
  transform: rotateY(90deg);
  box-shadow: inset 0 0 0 12px #80898e;
}
.panel-model {
  width: 250px;
  height: 210px;
  position: absolute;
  left: 55px;
  top: 20px;
  transform-style: preserve-3d;
  filter: drop-shadow(0 34px 24px #20303b45);
}
.box-face {
  position: absolute;
  background: linear-gradient(145deg, #8b989e, #34434b 65%, #1e2b33);
  border: 1px solid #afbac0;
}
.box-front,
.box-back {
  width: 240px;
  height: 190px;
}
.box-front {
  transform: translateZ(45px);
}
.box-back {
  transform: rotateY(180deg) translateZ(45px);
}
.box-left,
.box-right {
  width: 90px;
  height: 190px;
  left: 75px;
}
.box-left {
  transform: rotateY(-90deg) translateZ(120px);
}
.box-right {
  transform: rotateY(90deg) translateZ(120px);
}
.box-top,
.box-bottom {
  width: 240px;
  height: 90px;
  top: 50px;
}
.box-top {
  transform: rotateX(90deg) translateZ(95px);
}
.box-bottom {
  transform: rotateX(-90deg) translateZ(95px);
}
.panel-lid {
  position: absolute;
  inset: 15px;
  border: 4px solid #1c2930;
  box-shadow: inset 0 0 0 2px #aab4b8;
}
.panel-lid i {
  position: absolute;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #d9dfe1, #27343a 65%);
}
.panel-lid i:nth-child(1) {
  left: -10px;
  top: -10px;
}
.panel-lid i:nth-child(2) {
  right: -10px;
  top: -10px;
}
.panel-lid i:nth-child(3) {
  left: -10px;
  bottom: -10px;
}
.panel-lid i:nth-child(4) {
  right: -10px;
  bottom: -10px;
}
.terminal-row {
  position: absolute;
  left: 45px;
  right: 45px;
  top: 75px;
  display: flex;
  gap: 14px;
}
.terminal-row b {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #18242b;
  box-shadow: inset 0 0 0 5px #69757b;
}
.model-badge {
  position: absolute;
  left: 50%;
  top: 25px;
  transform: translateX(-50%);
  color: #dce3e6;
  border: 1px solid #bac4c850;
  padding: 5px 10px;
  font-size: 8px;
  font-weight: 800;
}
.panel-model.junction .terminal-row {
  display: none;
}
.panel-model.terminal .terminal-row b:nth-child(n + 4) {
  display: none;
}
@media (max-width: 850px) {
  .product-viewer {
    height: 390px;
    grid-template-rows: 46px 1fr 52px;
  }
  .product-viewer.photo-only {
    grid-template-rows: 1fr;
  }
  .model-stage {
    transform: scale(0.72) rotateX(-8deg) rotateY(-18deg);
  }
  .viewer-controls > span {
    display: none;
  }
  .viewer-controls button {
    padding: 9px;
  }
  .viewer-top {
    padding: 0 14px;
  }
  .viewer-hint {
    bottom: 10px;
  }
}