/* Layout: one-screen anatomy bench. Dark 3D stage left, study panel right; stacks on phones.
   Every colour is a token here. The stage stays dark in both themes; the panel follows the theme. */
@font-face{font-family:"Barlow Condensed";font-weight:500;font-display:swap;src:url(../vendor/fonts/barlow-condensed-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Barlow Condensed";font-weight:600;font-display:swap;src:url(../vendor/fonts/barlow-condensed-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Barlow Condensed";font-weight:700;font-display:swap;src:url(../vendor/fonts/barlow-condensed-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"Source Sans 3";font-weight:400;font-display:swap;src:url(../vendor/fonts/source-sans-3-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Source Sans 3";font-weight:600;font-display:swap;src:url(../vendor/fonts/source-sans-3-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Source Sans 3";font-weight:700;font-display:swap;src:url(../vendor/fonts/source-sans-3-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:400;font-display:swap;src:url(../vendor/fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:500;font-display:swap;src:url(../vendor/fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2")}

:root{
  --bg:#eef1f0; --panel:#f8faf9; --fg:#1d2624; --muted:#5b6a66; --line:#d3dbd8;
  --accent:#1f6f66; --accent-ink:#ffffff;
  /* stage: dark in both themes */
  --stage:#0b0f0e; --stage-glow:#1b2421; --stage-fg:#e6ecea; --stage-muted:#9fb0aa;
  --stage-chip:#141b19; --stage-line:#2c3835;
  /* tissue colours (used by the 3D scene) */
  --bone:#e9dfca;
  --lat:#f0a63a; --syn:#a58cf0; --med:#3fc2b3; --mid:#6aaef0;
  --ten:#d9d3c3; --nrv:#f4d03f; --art:#e2483d; --vein:#4f78d6; --sheet:#b9c7c2;
  --torn:#ff4d40; --pomi:#ff8a33; --lesion:#9bd17a;
  --f-display:"Barlow Condensed","Arial Narrow",sans-serif;
  --f-body:"Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#121816; --panel:#18201e; --fg:#e4ece9; --muted:#93a39e; --line:#2b3633;
  --accent:#4fb3a6; --accent-ink:#0b1311; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#121816; --panel:#18201e; --fg:#e4ece9; --muted:#93a39e; --line:#2b3633;
  --accent:#4fb3a6; --accent-ink:#0b1311; color-scheme:dark}

*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:15px;line-height:1.45}
.app{display:grid;grid-template-columns:minmax(0,1fr) 380px;height:100%}
.stage{position:relative;min-width:0;overflow:hidden;background:radial-gradient(120% 90% at 50% 40%,var(--stage-glow),var(--stage) 70%);color:var(--stage-fg)}
#c{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
.views,.tools{position:absolute;display:flex;gap:4px;flex-wrap:wrap}
.topbar{position:absolute;top:12px;left:max(12px,env(safe-area-inset-left,0px));right:150px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.topbar .views{position:static}
.home{font-family:var(--f-display);font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:13px;text-decoration:none;
  color:var(--accent-ink);background:var(--accent);border:1px solid var(--accent);padding:7px 11px;border-radius:4px;min-height:34px;display:inline-flex;align-items:center;gap:6px}
.home:hover{filter:brightness(1.1)}
.tools{bottom:12px;right:max(12px,env(safe-area-inset-right,0px));justify-content:flex-end}
.views button,.tools button{font-family:var(--f-display);font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:13px;
  border:1px solid var(--stage-line);background:var(--stage-chip);color:var(--stage-fg);padding:7px 10px;border-radius:4px;cursor:pointer;min-height:34px}
.views button[aria-pressed="true"],.tools button[aria-pressed="true"]{background:var(--stage-fg);color:var(--stage);border-color:var(--stage-fg)}
.orient{position:absolute;right:12px;top:14px;font-family:var(--f-mono);font-size:11px;color:var(--stage-muted);text-align:right}
.tip{position:absolute;pointer-events:none;background:var(--stage-fg);color:var(--stage);font-size:12px;padding:3px 7px;border-radius:3px;font-weight:600;white-space:nowrap}
.status{position:absolute;left:max(12px,env(safe-area-inset-left,0px));bottom:12px;font-family:var(--f-mono);font-size:12px;color:var(--stage-fg);
  background:color-mix(in srgb,var(--stage-chip) 88%,transparent);border:1px solid var(--stage-line);padding:6px 9px;border-radius:4px;max-width:calc(100% - 280px)}
.status b{color:var(--torn)}
.loading{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--f-display);letter-spacing:.12em;text-transform:uppercase;color:var(--stage-muted)}
.loading[hidden]{display:none}

.btn{font-family:var(--f-display);font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:13px;
  border:1px solid var(--line);background:var(--panel);color:var(--fg);padding:8px 12px;border-radius:4px;cursor:pointer;min-height:36px}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
button:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.link{background:none;border:0;padding:0;color:var(--accent);font:inherit;text-decoration:underline;cursor:pointer}
a{color:var(--accent)}

.panel{background:var(--panel);border-left:1px solid var(--line);overflow-y:auto;display:flex;flex-direction:column;gap:20px;
  padding-block:18px 28px;padding-left:18px;padding-right:max(18px,env(safe-area-inset-right,0px))}
h1{font-family:var(--f-display);font-weight:700;font-size:32px;line-height:1;letter-spacing:.01em;margin:0;text-wrap:balance}
.sub{color:var(--muted);margin:4px 0 0;font-size:13.5px}
.sec h2{font-family:var(--f-display);font-weight:600;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.tabs{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:10px}
.tabs button{flex:1 1 auto;font-family:var(--f-display);font-weight:600;font-size:14px;letter-spacing:.04em;border:1px solid var(--line);
  background:var(--bg);color:var(--fg);padding:7px 8px;border-radius:4px;cursor:pointer;min-height:38px}
.tabs button[aria-selected="true"]{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.sec h2.cond-title{font-size:20px;letter-spacing:.01em;text-transform:none;color:var(--fg);font-weight:700;margin:0 0 4px}
.step{margin:0 0 10px;min-height:4.4em;font-size:14.5px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:10px}
input[type=range]{width:100%;accent-color:var(--accent);min-height:28px}
.scale{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:11px;color:var(--muted)}
.check{display:flex;gap:8px;align-items:flex-start;font-size:14px;cursor:pointer;margin-top:12px}
.check input{margin-top:3px}
.layers{display:grid;gap:7px}
.layers label{display:flex;align-items:center;gap:9px;cursor:pointer;font-size:14.5px;min-height:26px}
.sw{width:22px;height:6px;border-radius:3px;flex:none;background:var(--sw)}
.more{margin-top:12px;border-top:1px solid var(--line);padding-top:8px}
.more summary{cursor:pointer;font-family:var(--f-display);font-weight:600;letter-spacing:.08em;text-transform:uppercase;font-size:13px;color:var(--accent);min-height:28px;display:flex;align-items:center}
.more h4{font-family:var(--f-display);font-weight:600;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:12px 0 2px}
.more p{margin:0}
.card{border-top:3px solid var(--card-c,var(--accent));padding-top:10px}
.card h3{font-family:var(--f-display);font-weight:700;font-size:23px;margin:0;line-height:1.05}
.card .grp{font-family:var(--f-mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.card dl{margin:10px 0 0;display:grid;gap:8px}
.card dt{font-family:var(--f-display);font-weight:600;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.card dd{margin:0}
.pearl{background:color-mix(in srgb,var(--card-c,var(--accent)) 14%,transparent);padding:8px 10px;border-radius:4px}
.quizq{font-size:16px;font-weight:600}
.answers{display:grid;gap:6px;margin-top:8px}
.answers button{text-align:left;font:inherit;border:1px solid var(--line);background:var(--bg);color:var(--fg);padding:8px 10px;border-radius:4px;cursor:pointer;min-height:40px}
.answers button.right{border-color:var(--med);background:color-mix(in srgb,var(--med) 18%,transparent)}
.answers button.wrong{border-color:var(--torn);background:color-mix(in srgb,var(--torn) 14%,transparent)}
.quizfb{font-size:14px;min-height:1.4em;margin-top:6px}
.score{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.ok{color:var(--accent)} .bad{color:var(--torn)}
.foot{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:10px}
.foot p{margin:0 0 8px}
dialog{max-width:min(720px,calc(100vw - 32px));max-height:80vh;border:1px solid var(--line);border-radius:6px;background:var(--panel);color:var(--fg);padding:18px}
dialog::backdrop{background:rgb(0 0 0 / .55)}
dialog h2{font-family:var(--f-display);margin:0}
dialog ol{padding-left:22px;font-size:13.5px}
dialog li{margin-bottom:6px;overflow-wrap:anywhere}
.close{float:right}

@media (max-width:820px){
  .app{grid-template-columns:1fr;grid-template-rows:62vh auto;height:auto}
  .stage{height:62vh;height:62svh}
  .panel{border-left:0;border-top:1px solid var(--line);overflow:visible;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
  .topbar{right:12px}
  .orient{display:none}
  .status{bottom:auto;top:auto;bottom:56px;max-width:calc(100% - 24px)}
  .tools{left:12px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* always-on labels (shared/labels.js); colours come from the structure tokens as SVG attributes, because the CSP blocks inline styles */
.labels{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
.labels line{stroke-width:1.2;opacity:.9}
.labels .a{fill:none;stroke-width:1.5}
.labels .d{pointer-events:auto;cursor:pointer}
.labels text{fill:var(--stage-fg);font-family:var(--f-body);font-size:12.5px;font-weight:600;paint-order:stroke;stroke:var(--stage);stroke-width:3px;stroke-linejoin:round;pointer-events:auto;cursor:pointer}
.labels .sel line{stroke-width:2.2;opacity:1}
.labels .sel text{fill:var(--accent)}