:root {
  color-scheme: light;
  --paper: #f0eee7;
  --ink: #292d2b;
  --muted: #60665c;
  --line: #d7d8cd;
  --accent: #8b4e32;
  --white: #faf9f5;
  font-family: Arial, Helvetica, sans-serif;
  font-synthesis: none;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  height: 100svh;
  overflow: hidden;
}
button,
select,
input {
  font: inherit;
}
button,
a,
select,
input {
  touch-action: manipulation;
}
button {
  cursor: pointer;
  color: inherit;
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  min-height: 44px;
  padding: 10px 13px;
}
button:hover {
  background: #e5e4dc;
}
button:disabled {
  opacity: 0.45;
  cursor: default;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible,
canvas:focus-visible {
  outline: 3px solid #935236;
  outline-offset: 3px;
}
button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}
[hidden] {
  display: none !important;
}
.masthead {
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 30px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1.7px;
}
.brand-light {
  font-weight: 400;
}
.brand small {
  display: block;
  font-size: 8px;
  letter-spacing: 2px;
  margin-top: 7px;
  color: var(--muted);
}
.brand-icon {
  font-family: Georgia, serif;
  font-size: 30px;
  font-weight: 400;
  border: 1px solid #a9ad9f;
  width: 40px;
  height: 45px;
  display: grid;
  place-items: center;
  border-radius: 50% 50% 4px 4px;
}
.top-actions {
  display: flex;
  gap: 8px;
}
.top-actions button {
  border-color: transparent;
}
.studio {
  height: calc(100svh - 162px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
}
.viewport {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: radial-gradient(
    ellipse at 48% 43%,
    #fbf9f2 5%,
    #efeee6 68%,
    #e9e9df 100%
  );
}
#specimen {
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}
#specimen:active {
  cursor: grabbing;
}
.view-caption {
  position: absolute;
  top: 24px;
  left: 30px;
  z-index: 2;
  pointer-events: none;
  max-width: 290px;
}
.edition {
  font-size: 9px;
  letter-spacing: 2px;
  font-weight: 700;
  color: var(--muted);
}
h1 {
  font:
    normal clamp(30px, 3.5vw, 49px) / 1.05 Georgia,
    serif;
  letter-spacing: -1.5px;
  margin: 10px 0;
}
#view-purpose {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 230px;
  margin-top: 8px;
}
.inspector {
  background: rgba(250, 249, 245, 0.8);
  border-left: 1px solid var(--line);
  padding: 28px 24px;
  overflow-y: auto;
  scrollbar-width: thin;
}
.lede {
  font:
    27px/1.22 Georgia,
    serif;
  margin: 13px 0 29px;
  letter-spacing: -0.5px;
}
.field-label {
  font-size: 9px;
  letter-spacing: 1.8px;
  display: block;
  color: var(--muted);
  margin-bottom: 9px;
}
select {
  min-height: 44px;
  width: 100%;
  padding: 11px 8px;
  background: transparent;
  border: 1px solid #c4c8bb;
  border-radius: 4px;
  font-size: 12px;
  color: var(--ink);
}
.panel-tools {
  display: flex;
  gap: 7px;
  margin: 12px 0 24px;
}
.panel-tools button {
  font-size: 11px;
  padding: 9px 10px;
  flex: 1;
}
.panel-tools span {
  color: var(--muted);
  font-size: 9px;
}
.source-note {
  font-size: 10px;
  line-height: 1.8;
  color: var(--muted);
  border-top: 1px solid var(--line);
  margin-top: 24px;
  padding-top: 18px;
}
.source-note a {
  font-size: 11px;
  display: block;
  margin-top: 8px;
}
#context h2 {
  font:
    25px/1.18 Georgia,
    serif;
  letter-spacing: -0.5px;
  margin: 12px 0;
}
#context p {
  font-size: 13px;
  line-height: 1.7;
  color: #5d635a;
}
#context .kicker {
  font-size: 9px;
  letter-spacing: 1.8px;
  color: var(--accent);
  text-transform: uppercase;
}
.number {
  font:
    italic 52px Georgia,
    serif;
  color: #7a806e;
}
.muscle-list {
  list-style: none;
  margin: 15px 0 0;
  padding: 0;
}
.muscle-list button {
  width: 100%;
  text-align: left;
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 12px;
  padding: 12px 0;
}
.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
  background: var(--swatch, #8b4e32);
}
.muscle-list .index {
  font-size: 10px;
  color: var(--muted);
  margin-left: auto;
}
dl {
  font-size: 12px;
  line-height: 1.6;
}
dt {
  font-size: 9px;
  letter-spacing: 1.3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 15px;
}
dd {
  margin: 4px 0 0;
}
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0;
}
.action-row button {
  font-size: 12px;
  flex: 1;
}
.primary {
  background: var(--ink);
  color: var(--white);
}
.primary:hover {
  background: #41483b;
}
.integrity {
  font-size: 10px !important;
  line-height: 1.6 !important;
  border-left: 2px solid #c4b69d;
  padding-left: 10px;
  color: var(--muted) !important;
}
.lesson-nav {
  display: flex;
  gap: 8px;
}
.lesson-nav button {
  flex: 1;
}
.steps {
  height: 3px;
  background: #dedfd5;
  margin: 20px 0;
}
.steps span {
  height: 100%;
  display: block;
  background: var(--accent);
}
input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  min-height: 44px;
}
.peel-stages {
  font-size: 11px !important;
}
.stage-list button {
  display: block;
  width: 100%;
  text-align: left;
  margin: 5px 0;
  font-size: 11px;
}
.quiz-score {
  font:
    38px Georgia,
    serif;
  color: var(--accent);
}
#feedback {
  font-size: 12px;
  line-height: 1.6;
  margin-top: 14px;
}
#structure-list {
  max-height: 220px;
  overflow: auto;
  margin-bottom: 20px;
}
#structure-list button {
  display: block;
  width: 100%;
  text-align: left;
  font-size: 11px;
  border: 0;
  border-bottom: 1px solid var(--line);
}
.bottom-bar {
  height: 78px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  gap: 20px;
  background: var(--paper);
}
#mode-controls {
  display: flex;
  gap: 5px;
}
#mode-controls button {
  border: 0;
  font-size: 13px;
  padding: 13px 19px;
}
#mode-controls button span {
  font-size: 9px;
  opacity: 0.85;
  margin-right: 8px;
}
.gesture-help {
  font-size: 10px;
  color: var(--muted);
}
.gesture-help i {
  margin: 0 6px;
}
.version {
  font-size: 8px;
  letter-spacing: 2px;
  color: var(--muted);
}
.view-bottom {
  position: absolute;
  bottom: 18px;
  left: 30px;
  right: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--muted);
}
.zoom-controls {
  display: flex;
  pointer-events: auto;
  gap: 4px;
}
.zoom-controls button {
  width: 44px;
  padding: 0;
  background: #faf9f0aa;
  font-size: 21px;
}
.skip {
  position: fixed;
  top: -90px;
  left: 12px;
  z-index: 20;
  background: var(--ink);
  color: white;
  padding: 14px;
}
.skip:focus {
  top: 10px;
}
#leaders {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}
#leaders line {
  stroke: #8a8e80;
  stroke-width: 0.7;
}
#leaders circle {
  fill: var(--accent);
}
#atlas {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.atlas-label {
  position: absolute;
  width: 158px;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(246, 245, 238, 0.88);
  padding: 8px 10px;
  border: 0;
  border-left: 2px solid var(--swatch);
  border-radius: 0;
  text-align: left;
  font-size: 11px;
  pointer-events: auto;
  box-shadow: 0 3px 12px #30332205;
}
.atlas-label.selected {
  font-weight: bold;
  border-left-width: 4px;
}
.atlas-label .index {
  font:
    italic 16px Georgia,
    serif;
  opacity: 1;
}
#hover {
  position: absolute;
  pointer-events: none;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: #fffef6f0;
  border-radius: 4px;
  font-size: 11px;
  z-index: 4;
  max-width: 200px;
}
#orientation {
  position: absolute;
  right: 15px;
  top: 17px;
  width: 140px;
  height: 155px;
  touch-action: none;
  z-index: 3;
  cursor: grab;
}
#cube {
  width: 140px;
  height: 140px;
  pointer-events: none;
}
#cube-faces button {
  position: absolute;
  min-height: 26px;
  height: 26px;
  width: 26px;
  padding: 0;
  border: 0;
  border-radius: 3px;
  font-size: 10px;
  color: #616959;
  background: transparent;
  transform: translate(-50%, -50%);
}
#cube-faces .corner {
  width: 15px;
  height: 15px;
  min-height: 15px;
  border-radius: 50%;
  font-size: 0;
  background: #7e887855;
}
#cube-faces button:hover {
  background: #d7dccc;
}
.cube-caption {
  display: block;
  text-align: center;
  font-size: 7px;
  letter-spacing: 1.5px;
  color: var(--muted);
  position: absolute;
  bottom: 0;
  width: 100%;
}
#loading {
  position: absolute;
  inset: 0;
  background: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
  z-index: 8;
  font-size: 12px;
  color: var(--muted);
}
.loading-ring {
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
#error {
  position: absolute;
  inset: 20%;
  padding: 30px;
  background: var(--white);
  z-index: 10;
}
#error a {
  display: block;
  margin-top: 14px;
}
dialog {
  max-width: 660px;
  width: calc(100% - 32px);
  max-height: 85svh;
  overflow: auto;
  background: var(--white);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 26px;
  box-shadow: 0 24px 100px #0003;
}
dialog::backdrop {
  background: #1f292566;
  backdrop-filter: blur(3px);
}
.dialog-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
dialog h2 {
  font:
    32px Georgia,
    serif;
}
dialog h3 {
  font:
    20px Georgia,
    serif;
  margin: 25px 0 10px;
}
dialog p,
dialog li {
  font-size: 12px;
  line-height: 1.7;
}
dialog pre {
  font-size: 10px;
  overflow: auto;
  background: var(--paper);
  padding: 12px;
}
.provenance-row {
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
}
summary {
  cursor: pointer;
  min-height: 44px;
  padding-top: 12px;
}
noscript {
  position: fixed;
  inset: 20%;
  z-index: 30;
  background: white;
  padding: 30px;
}
@media (max-width: 1000px) {
  .studio {
    grid-template-columns: minmax(0, 1fr) 270px;
  }
  .inspector {
    padding: 24px 18px;
  }
  .gesture-help,
  .version {
    display: none;
  }
  .bottom-bar {
    justify-content: center;
  }
  .view-caption {
    left: 20px;
  }
  .view-caption h1 {
    font-size: 35px;
  }
  .atlas-label {
    width: 135px;
    font-size: 10px;
  }
}
@media (max-width: 700px) {
  body {
    overflow: auto;
    height: auto;
    min-height: 100svh;
  }
  .masthead {
    height: 62px;
    padding: 0 15px;
  }
  .brand {
    font-size: 12px;
    gap: 8px;
  }
  .brand-icon {
    width: 30px;
    height: 34px;
    font-size: 23px;
  }
  .brand small {
    font-size: 6px;
  }
  .top-actions {
    gap: 0;
  }
  .top-actions button {
    padding: 8px;
    min-width: 44px;
  }
  .top-actions button span {
    display: none;
  }
  .studio {
    display: flex;
    height: auto;
    flex-direction: column;
  }
  .viewport {
    height: 58svh;
    min-height: 390px;
    max-height: 650px;
    flex: none;
  }
  .view-caption {
    top: 17px;
    left: 18px;
    max-width: 190px;
  }
  .view-caption h1 {
    font-size: 31px;
    margin: 7px 0;
  }
  .edition {
    font-size: 8px;
  }
  #view-purpose {
    font-size: 10px;
    max-width: 175px;
    line-height: 1.4;
  }
  #orientation {
    transform: scale(0.72);
    transform-origin: top right;
    right: 4px;
    top: 10px;
  }
  .view-bottom {
    left: 15px;
    right: 15px;
    bottom: 10px;
    font-size: 7px;
    letter-spacing: 0.2px;
  }
  .zoom-controls button {
    min-height: 44px;
    width: 40px;
  }
  .inspector {
    padding: 20px 20px 95px;
    border-left: 0;
    border-top: 1px solid var(--line);
    overflow: visible;
  }
  .inspector-top {
    display: none;
  }
  .panel-tools {
    margin-bottom: 18px;
  }
  .panel-tools button {
    font-size: 12px;
  }
  .source-note {
    margin-top: 16px;
  }
  .bottom-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: auto;
    min-height: 65px;
    padding: 7px 8px calc(7px + env(safe-area-inset-bottom));
    z-index: 9;
    box-shadow: 0 -8px 25px #f0eee780;
  }
  #mode-controls {
    width: 100%;
    justify-content: space-around;
  }
  #mode-controls button {
    padding: 10px 11px;
    font-size: 12px;
  }
  #mode-controls button span {
    display: block;
    margin: 0 0 4px;
    font-size: 8px;
  }
  .atlas-label {
    font-size: 9px;
    width: 118px;
    gap: 5px;
    padding: 6px;
    min-height: 44px;
  }
  .atlas-label .index {
    font-size: 12px;
  }
  #context h2 {
    font-size: 24px;
  }
  .source-note br:first-of-type {
    display: none;
  }
  .source-note {
    font-size: 10px;
  }
  .muscle-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 12px;
  }
  .muscle-list button {
    font-size: 11px;
  }
  .integrity {
    font-size: 11px !important;
  }
  #error {
    inset: 12%;
    padding: 20px;
  }
}
@media (max-height: 520px) and (orientation: landscape) {
  body {
    overflow: hidden;
  }
  .masthead {
    height: 50px;
  }
  .studio {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    height: calc(100svh - 112px);
  }
  .viewport {
    height: 100%;
    min-height: 0;
  }
  .inspector {
    overflow: auto;
    padding: 14px;
  }
  .bottom-bar {
    position: static;
    height: 62px;
  }
  .view-caption h1 {
    font-size: 25px;
  }
  #view-purpose {
    display: none;
  }
  .view-caption {
    top: 10px;
  }
  #orientation {
    transform: scale(0.65);
    transform-origin: top right;
  }
  .source-note {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

/* Keep the anatomy present while the mobile lesson panel scrolls independently. */
@media (max-width: 700px) and (orientation: portrait) {
  body {
    height: 100svh;
    overflow: hidden;
  }
  .studio {
    height: calc(100svh - 127px - env(safe-area-inset-bottom));
    overflow: hidden;
  }
  .viewport {
    height: 60%;
    min-height: 0;
    max-height: none;
    flex: 0 0 60%;
  }
  .inspector {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 18px 20px 24px;
  }
  .source-note {
    display: none;
  }
  body[data-mode="learn"] .inspector > .field-label,
  body[data-mode="learn"] #view-select,
  body[data-mode="learn"] .panel-tools,
  body[data-mode="quiz"] .inspector > .field-label,
  body[data-mode="quiz"] #view-select,
  body[data-mode="quiz"] .panel-tools {
    display: none;
  }
  body[data-mode="peel"] .inspector > .field-label,
  body[data-mode="peel"] #view-select,
  body[data-mode="peel"] .panel-tools {
    display: none;
  }
  #context .number {
    font-size: 32px;
  }
  #context h2 {
    font-size: 22px;
    margin-top: 8px;
  }
  #context p {
    font-size: 12px;
    line-height: 1.55;
  }
  .steps {
    margin: 12px 0;
  }
}
@media (max-height: 520px) and (orientation: landscape) {
  .inspector-top {
    display: none;
  }
  .panel-tools {
    margin: 8px 0 12px;
  }
}