:root {
  --anatomy-ink: #eaf8fb;
  --anatomy-muted: #9cb7c2;
  --anatomy-panel: rgba(8, 29, 39, 0.92);
  --anatomy-line: rgba(112, 222, 230, 0.2);
  --anatomy-cyan: #3cdbe2;
  --anatomy-yellow: #ffd54a;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.anatomy-page.site-atmosphere {
  background: #06151d;
}

.anatomy-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  align-items: end;
  max-width: var(--container);
  margin: 0 auto;
  padding: 132px 24px 40px;
  color: var(--anatomy-ink);
}

.anatomy-intro > div {
  max-width: 900px;
}

.anatomy-intro h1 {
  max-width: 820px;
  margin: 0.35rem 0 1rem;
  font-size: clamp(34px, 3.8vw, 48px);
  line-height: 1.18;
  text-wrap: balance;
}

.anatomy-intro p:not(.eyebrow) {
  max-width: 820px;
  margin: 0;
  color: var(--anatomy-muted);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.65;
}

.anatomy-back-link {
  padding-bottom: 0.45rem;
  color: var(--anatomy-cyan);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.anatomy-back-link:hover,
.anatomy-back-link:focus-visible {
  text-decoration: underline;
}

.anatomy-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(290px, 380px);
  height: clamp(680px, calc(100vh - 5rem), 790px);
  min-height: 0;
  width: calc(100% - 48px);
  max-width: 1432px;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--anatomy-line);
  border-radius: 12px;
  background: #0a202a;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.35);
}

.anatomy-viewer {
  position: relative;
  min-height: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 42%, rgba(48, 111, 124, 0.3), transparent 52%),
    linear-gradient(155deg, #19323d, #081820 72%);
  touch-action: none;
}

#anatomyCanvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
}

.anatomy-loader {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 4;
  overflow: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.anatomy-loader.is-hidden {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.anatomy-loader img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.anatomy-loader-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 21, 29, 0.28), rgba(6, 21, 29, 0.84));
}

.anatomy-loader-copy {
  position: relative;
  display: grid;
  gap: 0.55rem;
  width: min(420px, calc(100% - 2rem));
  padding: 1.4rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 18px;
  color: #fff;
  text-align: center;
  background: rgba(5, 21, 29, 0.84);
  backdrop-filter: blur(12px);
}

.anatomy-loader-copy strong {
  font-size: 1.12rem;
}

.anatomy-loader-copy span:not(.anatomy-progress) {
  color: #bad0d8;
}

.anatomy-start-button {
  min-height: 48px;
  margin-top: 0.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--anatomy-cyan);
  border-radius: 10px;
  background: #3cdbe2;
  color: #06151d;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.anatomy-start-button:hover:not(:disabled) { background: #b8ffff; }
.anatomy-start-button:focus-visible { outline: 3px solid #ffd54a; outline-offset: 3px; }
.anatomy-start-button:disabled { opacity: 0.65; cursor: wait; }
.anatomy-start-button[hidden], .anatomy-progress[hidden] { display: none; }
.anatomy-no-script { margin: 0.5rem 0 0; color: #bad0d8; font-size: 0.9rem; line-height: 1.5; }
.anatomy-view-actions button:disabled { opacity: 0.5; cursor: default; }

.anatomy-file-instruction {
  display: block;
  margin-top: 1rem;
  color: #c7dce3;
  font-size: 0.78rem;
  line-height: 1.5;
}

.anatomy-file-command {
  display: block;
  margin-top: 0.65rem;
  padding: 0.72rem 0.8rem;
  overflow-wrap: anywhere;
  border: 1px solid rgba(255, 213, 74, 0.32);
  border-radius: 10px;
  color: #fff3ba;
  font-size: 0.72rem;
  line-height: 1.45;
  text-align: left;
  user-select: all;
  background: rgba(255, 213, 74, 0.07);
}

.anatomy-progress {
  height: 5px;
  margin-top: 0.35rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
}

.anatomy-progress i {
  display: block;
  width: 8%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--anatomy-cyan), #b8ffff);
  transition: width 0.2s ease;
}

.anatomy-gesture-hint {
  position: absolute;
  left: 50%;
  bottom: 1.2rem;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.83rem;
  background: rgba(4, 18, 25, 0.76);
  transform: translateX(-50%);
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.anatomy-gesture-hint.is-hidden {
  opacity: 0;
}

.anatomy-gesture-hint span {
  color: var(--anatomy-cyan);
  font-size: 1.1rem;
}

.anatomy-view-actions {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.anatomy-view-actions button,
.anatomy-control-buttons button {
  min-height: 42px;
  padding: 0.62rem 0.88rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  color: #dff8fa;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  background: rgba(5, 24, 32, 0.78);
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.anatomy-view-actions button:hover,
.anatomy-view-actions button:focus-visible,
.anatomy-control-buttons button:hover,
.anatomy-control-buttons button:focus-visible,
.anatomy-view-actions button[aria-pressed="true"],
.anatomy-control-buttons button[aria-pressed="true"] {
  border-color: var(--anatomy-cyan);
  color: #042027;
  background: var(--anatomy-cyan);
}

.anatomy-view-actions button:focus-visible,
.anatomy-control-buttons button:focus-visible,
.anatomy-layer-list input:focus-visible + span {
  outline: 3px solid rgba(255, 213, 74, 0.7);
  outline-offset: 2px;
}

.anatomy-controls {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  padding: clamp(1.35rem, 2.6vw, 2.2rem);
  overflow-y: auto;
  scrollbar-color: rgba(108, 203, 222, 0.55) transparent;
  scrollbar-width: thin;
  color: var(--anatomy-ink);
  background: var(--anatomy-panel);
}

.anatomy-controls::-webkit-scrollbar {
  width: 8px;
}

.anatomy-controls::-webkit-scrollbar-track {
  background: transparent;
}

.anatomy-controls::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: 999px;
  background: rgba(108, 203, 222, 0.55);
  background-clip: padding-box;
}

.anatomy-controls h2 {
  margin: 0.15rem 0 0.65rem;
  font-size: clamp(1.55rem, 2.4vw, 2.1rem);
}

.anatomy-controls-note {
  margin: 0;
  color: var(--anatomy-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.anatomy-motion-panel {
  display: grid;
  gap: 0.95rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.11);
}

.anatomy-motion-panel h2 {
  margin: 0.15rem 0 0.55rem;
}

.anatomy-program-field {
  display: grid;
  gap: 0.42rem;
  color: var(--anatomy-muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.anatomy-program-field select {
  width: 100%;
  min-height: 44px;
  padding: 0.6rem 2.25rem 0.6rem 0.78rem;
  border: 1px solid rgba(60, 219, 226, 0.28);
  border-radius: 12px;
  color: var(--anatomy-ink);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: normal;
  text-transform: none;
  background: #0d2b36;
  cursor: pointer;
}

.anatomy-program-field select:focus-visible {
  outline: 3px solid rgba(255, 213, 74, 0.7);
  outline-offset: 2px;
}

.anatomy-program-field select:disabled {
  opacity: 0.55;
  cursor: wait;
}

.anatomy-motion-actions {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(82px, 0.7fr);
  gap: 0.55rem;
}

.anatomy-motion-actions button {
  min-height: 43px;
  padding: 0.62rem 0.72rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  color: #dff8fa;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 750;
  background: rgba(5, 24, 32, 0.78);
  cursor: pointer;
}

.anatomy-motion-actions button:hover,
.anatomy-motion-actions button:focus-visible,
.anatomy-motion-actions button[aria-pressed="true"] {
  border-color: var(--anatomy-yellow);
  color: #1b1804;
  background: var(--anatomy-yellow);
}

.anatomy-motion-actions button:focus-visible {
  outline: 3px solid rgba(60, 219, 226, 0.62);
  outline-offset: 2px;
}

.anatomy-motion-actions button:disabled {
  opacity: 0.45;
  cursor: wait;
}

.anatomy-motion-track {
  position: relative;
  height: 9px;
  margin: 0.15rem 0 0.05rem;
  border-radius: 999px;
  background: rgba(60, 219, 226, 0.14);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.07);
}

.anatomy-motion-track i {
  position: absolute;
  inset-block: 1px;
  left: 0;
  width: 10%;
  border-radius: inherit;
  background: rgba(120, 210, 44, 0.38);
  box-shadow: 0 0 10px rgba(120, 210, 44, 0.28);
}

.anatomy-motion-track b {
  position: absolute;
  top: 50%;
  left: 0;
  width: 24px;
  height: 13px;
  border: 1px solid rgba(255, 248, 190, 0.88);
  border-radius: 4px;
  background: #ffdc00;
  box-shadow: 0 0 16px rgba(255, 220, 0, 0.9);
  transform: translate(-50%, -50%);
}

.anatomy-motion-readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.48rem;
  margin: 0;
}

.anatomy-motion-readout div {
  min-width: 0;
  padding: 0.58rem 0.62rem;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.035);
}

.anatomy-motion-readout dt {
  overflow: hidden;
  color: var(--anatomy-muted);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.anatomy-motion-readout dd {
  margin: 0.18rem 0 0;
  color: var(--anatomy-ink);
  font-size: 0.86rem;
  font-weight: 760;
}

.anatomy-motion-readout div:last-child {
  grid-column: 1 / -1;
}

.anatomy-motion-readout .anatomy-motion-depth,
.anatomy-motion-readout .anatomy-motion-groups {
  grid-column: 1 / -1;
}

.anatomy-motion-source {
  margin: 0;
  color: var(--anatomy-muted);
  font-size: 0.7rem;
  line-height: 1.45;
}

.anatomy-layer-list {
  display: grid;
  gap: 0.55rem;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.anatomy-layer-list label {
  position: relative;
  display: block;
  cursor: pointer;
}

.anatomy-layer-list input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.anatomy-layer-list label > span {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 0 0.72rem;
  align-items: center;
  padding: 0.72rem 0.78rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.035);
  transition: border-color 0.2s ease, background 0.2s ease, opacity 0.2s ease;
}

.anatomy-layer-list label > span::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0.9rem;
  width: 9px;
  height: 9px;
  border: 2px solid rgba(255, 255, 255, 0.38);
  border-radius: 50%;
  transform: translateY(-50%);
}

.anatomy-layer-list input:checked + span {
  border-color: rgba(60, 219, 226, 0.38);
  background: rgba(60, 219, 226, 0.08);
}

.anatomy-layer-list input:checked + span::after {
  border-color: var(--anatomy-cyan);
  background: var(--anatomy-cyan);
  box-shadow: 0 0 12px rgba(60, 219, 226, 0.7);
}

.anatomy-layer-list input:not(:checked) + span {
  opacity: 0.54;
}

.anatomy-layer-list b,
.anatomy-layer-list small {
  grid-column: 2;
}

.anatomy-layer-list b {
  padding-right: 1.2rem;
  font-size: 0.91rem;
}

.anatomy-layer-list small {
  margin-top: 0.12rem;
  color: var(--anatomy-muted);
  font-size: 0.72rem;
  line-height: 1.35;
}

.layer-swatch {
  grid-row: 1 / 3;
  width: 19px;
  height: 19px;
  border-radius: 6px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.layer-bones,
.layer-ribs { background: #c8aa72; }
.layer-muscles { background: #a62a18; }
.layer-abdomen { background: #dc3d1e; }
.layer-abdomen-middle { background: #8f261e; }
.layer-abdomen-deep { background: #5e1720; }
.layer-nerves { background: #f7b33a; }
.layer-table { background: #eaf2ed; }

.anatomy-control-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.anatomy-control-buttons button:disabled {
  opacity: 0.45;
  cursor: wait;
}

.anatomy-help {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--anatomy-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.anatomy-help summary {
  color: var(--anatomy-ink);
  font-weight: 700;
  cursor: pointer;
}

.anatomy-help p {
  margin: 0.7rem 0 0;
}

.anatomy-explanation {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: 1480px;
  margin: 0 auto;
  padding: 3rem 0;
  color: var(--anatomy-ink);
  background: rgba(60, 219, 226, 0.15);
}

.anatomy-explanation article {
  padding: clamp(1.5rem, 3vw, 2.7rem);
  background: #06151d;
}

.anatomy-explanation span {
  color: var(--anatomy-cyan);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.anatomy-explanation h2 {
  margin: 0.8rem 0 0.6rem;
  font-size: 1.35rem;
}

.anatomy-explanation p {
  margin: 0;
  color: var(--anatomy-muted);
  line-height: 1.62;
}

.anatomy-disclaimer {
  max-width: 1220px;
  margin: 1rem auto 5rem;
  padding: clamp(1.5rem, 3vw, 2.6rem);
  border: 1px solid rgba(255, 213, 74, 0.22);
  border-radius: 12px;
  color: var(--anatomy-ink);
  background: rgba(255, 213, 74, 0.045);
}

.anatomy-disclaimer h2 {
  margin: 0 0 0.75rem;
  font-size: 1.45rem;
}

.anatomy-disclaimer p {
  margin: 0;
  color: var(--anatomy-muted);
  line-height: 1.65;
}

.anatomy-disclaimer .anatomy-attribution {
  margin-top: 1rem;
  font-size: 0.78rem;
}

.anatomy-attribution a {
  color: var(--anatomy-cyan);
}

.anatomy-viewer:fullscreen {
  width: 100vw;
  height: 100vh;
  min-height: 100vh;
  background: #081820;
}

.anatomy-viewer:fullscreen .anatomy-view-actions {
  top: max(1rem, env(safe-area-inset-top));
  left: max(1rem, env(safe-area-inset-left));
}

.anatomy-viewer.is-error .anatomy-loader-copy {
  border-color: rgba(255, 116, 92, 0.65);
}

@media (max-width: 1080px) {
  .anatomy-intro,
  .anatomy-workspace,
  .anatomy-explanation,
  .anatomy-disclaimer {
    margin-right: 1rem;
    margin-left: 1rem;
  }

  .anatomy-workspace {
    width: calc(100% - 32px);
    grid-template-columns: 1fr;
    height: auto;
  }

  .anatomy-viewer {
    min-height: 62vw;
  }

  .anatomy-controls {
    display: grid;
    grid-template-columns: minmax(210px, 0.8fr) minmax(0, 1.5fr);
  }

  .anatomy-motion-panel {
    grid-column: 1 / -1;
    grid-template-columns: minmax(230px, 0.9fr) minmax(260px, 1.1fr);
    align-items: start;
  }

  .anatomy-motion-panel > div:first-child,
  .anatomy-motion-track,
  .anatomy-motion-source {
    grid-column: 1 / -1;
  }

  .anatomy-layer-list {
    grid-template-columns: 1fr 1fr;
  }

  .anatomy-control-buttons,
  .anatomy-help {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .anatomy-intro {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    padding: 7rem 6px 2rem;
  }

  .anatomy-intro h1 {
    font-size: clamp(1.875rem, 7vw, 2.5rem);
    overflow-wrap: anywhere;
  }

  .anatomy-back-link {
    white-space: normal;
  }

  .anatomy-workspace {
    border-radius: 12px;
  }

  .anatomy-viewer {
    min-height: 72vh;
  }

  .anatomy-controls {
    display: flex;
  }

  .anatomy-motion-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .anatomy-motion-actions,
  .anatomy-motion-readout {
    grid-template-columns: 1fr;
  }

  .anatomy-motion-readout div:last-child {
    grid-column: auto;
  }

  .anatomy-layer-list {
    grid-template-columns: 1fr;
  }

  .anatomy-explanation {
    grid-template-columns: 1fr;
  }

  .anatomy-view-actions {
    right: 0.7rem;
    left: 0.7rem;
  }

  .anatomy-view-actions button {
    flex: 1 1 calc(50% - 0.45rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .anatomy-loader,
  .anatomy-gesture-hint,
  .anatomy-layer-list label > span {
    transition: none;
  }
}
.anatomy-contraction-overlay {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  width: fit-content;
  max-width: calc(100% - 2rem);
  padding: 0.6rem 0.8rem;
  border: 1px solid #b68c35;
  border-radius: 10px;
  color: #ffe295;
  background: rgba(7, 26, 36, 0.92);
  font-size: 0.9rem;
  font-weight: 700;
  pointer-events: none;
  z-index: 2;
}
.anatomy-viewer .anatomy-gesture-hint {
  bottom: 5.5rem;
}