:root{--ink: #14323a;--ink-soft: #3d5a61;--bone: #f4ebd9;--paper: #fbf8f2;--coral: #c4533a;--teal: #1f6f78;--line: #d9d2c3;--sys-bone: #efe6d2;--sys-muscle: #c2554b;--sys-organ: #d9a07a;--sys-nerve: #e8c547;--sys-artery: #c9302c;--sys-vein: #3e6fb0;--sys-ligament: #9fb8ad;--sys-skin: #e8c9b0;--font-ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-read: "Source Serif 4", Georgia, "Times New Roman", serif;--radius: 14px;--shadow: 0 6px 24px rgb(20 50 58 / 12%);color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--ink: #e9f1ef;--ink-soft: #b4c5c2;--bone: #23201d;--paper: #0f1a1d;--coral: #f08a6f;--teal: #6cc1c8;--line: #2d3b3f;--shadow: 0 6px 24px rgb(0 0 0 / 45%);color-scheme:dark}}:root[data-theme=dark]{--ink: #e9f1ef;--ink-soft: #b4c5c2;--bone: #23201d;--paper: #0f1a1d;--coral: #f08a6f;--teal: #6cc1c8;--line: #2d3b3f;--shadow: 0 6px 24px rgb(0 0 0 / 45%);color-scheme:dark}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(/app/source-serif-4-latin-400-normal-CjrsHTK6.woff2) format("woff2"),url(/app/source-serif-4-latin-400-normal-CSsFCx3j.woff) format("woff")}@font-face{font-family:"Source Serif 4";font-style:italic;font-display:swap;font-weight:400;src:url(/app/source-serif-4-latin-400-italic-CpHvpfHf.woff2) format("woff2"),url(/app/source-serif-4-latin-400-italic-DxlkqUlJ.woff) format("woff")}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(/app/source-serif-4-latin-600-normal-o3gjl2h6.woff2) format("woff2"),url(/app/source-serif-4-latin-600-normal-BqP-dZFg.woff) format("woff")}*,*:before,*:after{box-sizing:border-box}html,body,#app{margin:0;height:100%}body{background:var(--paper);color:var(--ink);font:15px/1.45 var(--font-ui);-webkit-font-smoothing:antialiased;overflow:hidden}a{color:var(--teal)}:focus-visible{outline:3px solid var(--coral);outline-offset:2px;border-radius:6px}.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.muted{color:var(--ink-soft)}.small{font-size:13px}.app{position:fixed;inset:0;display:grid;grid-template-rows:56px 1fr}.stage{position:absolute;inset:56px 0 0;background:radial-gradient(ellipse at 50% 40%,color-mix(in srgb,var(--bone) 70%,var(--paper)) 0%,var(--paper) 70%);touch-action:none}.stage canvas{display:block;outline:none}.btn{font:inherit;font-weight:550;color:var(--ink);background:var(--bone);border:1px solid var(--line);border-radius:999px;padding:7px 14px;cursor:pointer;min-height:36px;white-space:nowrap}.btn:hover:not(:disabled){border-color:var(--teal)}.btn:disabled{opacity:.45;cursor:default}.btn.ghost{background:transparent;border-color:transparent}.btn.ghost:hover:not(:disabled){background:color-mix(in srgb,var(--bone) 80%,transparent)}.btn.icon{padding:4px 10px;font-size:18px;line-height:1}.btn.small{padding:5px 11px;min-height:32px;font-size:13px}.btn.primary{background:var(--teal);color:var(--paper);border-color:var(--teal)}.btn.active{background:var(--ink);color:var(--paper)}.link{background:none;border:0;padding:0;color:var(--teal);text-decoration:underline;cursor:pointer;font:inherit}.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--ink-soft)}.badge:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--c);border:1px solid color-mix(in srgb,var(--ink) 30%,transparent)}.topbar{position:relative;z-index:20;display:flex;align-items:center;gap:12px;padding:0 12px;height:56px;background:color-mix(in srgb,var(--paper) 92%,transparent);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}.brand{display:flex;align-items:center;gap:8px;color:var(--ink);text-decoration:none;font:600 20px/1 var(--font-read)}.top-actions{margin-left:auto;display:flex;align-items:center;gap:4px}.menu-wrap{position:relative}.menu{position:absolute;right:0;top:44px;min-width:220px;list-style:none;margin:0;padding:6px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.menu button,.menu a{display:block;width:100%;text-align:left;padding:9px 12px;border-radius:8px;border:0;background:none;color:var(--ink);font:inherit;text-decoration:none;cursor:pointer}.menu button:hover,.menu a:hover{background:var(--bone)}.show-narrow{display:none}.search{position:relative;flex:1;max-width:440px}.search input{width:100%;font:inherit;color:var(--ink);background:var(--bone);border:1px solid var(--line);border-radius:999px;padding:9px 16px}.search-results{position:absolute;top:46px;left:0;right:0;list-style:none;margin:0;padding:6px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);max-height:60vh;overflow:auto}.search-results li{display:grid;grid-template-columns:1fr auto;gap:0 8px;padding:8px 10px;border-radius:8px;cursor:pointer}.search-results li.active,.search-results li:hover{background:var(--bone)}.sr-title{font-weight:600}.sr-name{grid-column:1;font-size:13px;color:var(--ink-soft)}.search-results .badge{grid-row:1 / span 2;grid-column:2}.no-results{display:block!important;cursor:default!important}.layers{position:absolute;z-index:10;left:12px;top:68px;width:300px;max-height:calc(100% - 80px);overflow:auto;padding:12px;background:color-mix(in srgb,var(--paper) 94%,transparent);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.panel-title{margin:0 0 8px;font:600 13px/1 var(--font-ui);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft)}.layer-list{list-style:none;margin:0;padding:0}.layer-row{display:grid;grid-template-columns:14px 1fr auto;align-items:center;gap:8px;padding:4px 0}.layer-row[data-state=off] .layer-name{color:var(--ink-soft)}.layer-row.unavailable .layer-name{color:var(--ink-soft);flex-wrap:wrap}.layer-row.unavailable .swatch,.layer-row.unavailable .seg{opacity:.45}.layer-note{flex-basis:100%;font-size:.8em;font-weight:400}.swatch{width:14px;height:14px;border-radius:4px;border:1px solid color-mix(in srgb,var(--ink) 30%,transparent)}.layer-name{font-weight:550;display:flex;align-items:center;gap:6px}.seg{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{font:600 12px/1 var(--font-ui);color:var(--ink-soft);background:transparent;border:0;padding:7px 9px;cursor:pointer;min-height:30px}.seg button.on{background:var(--ink);color:var(--paper)}.layer-actions{display:flex;gap:2px;align-items:center;margin-top:10px}.layer-actions .btn:first-child{margin-right:auto}.spinner{width:10px;height:10px;border:2px solid var(--line);border-top-color:var(--teal);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.layers-chip{position:absolute;z-index:10;left:12px;top:68px;box-shadow:var(--shadow)}.small-icon{font-size:16px;min-height:28px}.browse{margin-top:12px;border-top:1px solid var(--line);padding-top:10px}.browse-head{display:flex;justify-content:space-between;align-items:center}.browse details{padding:2px 0}.browse summary{cursor:pointer;font-weight:600;padding:4px 0}.browse .nested{margin-left:12px}.browse .nested summary{font-weight:500}.browse ul{list-style:none;margin:0 0 4px 14px;padding:0}.browse li a{display:block;padding:3px 0}.card-panel{position:absolute;z-index:15;right:12px;top:68px;bottom:12px;width:400px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);display:flex;flex-direction:column}.card-panel .close{position:absolute;right:6px;top:6px}.sheet-handle{display:none}.card-body{overflow:auto;padding:18px 22px 22px}.eyebrow{margin:0 0 6px;display:flex;gap:10px;align-items:center;font-size:12px;color:var(--ink-soft)}.card-title{margin:0 32px 2px 0;font:600 27px/1.15 var(--font-read)}.card-sub{margin:0 0 12px;color:var(--ink-soft);font-size:14px}.latin{font-family:var(--font-read)}.card{font-family:var(--font-read);font-size:17.5px;line-height:1.55}.card h2{font:700 12px/1 var(--font-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin:18px 0 6px}.card p{margin:0 0 10px;max-width:68ch}.one-liner{font-size:19px;font-style:italic}.fact{background:var(--bone);border-left:4px solid var(--coral);border-radius:10px;padding:4px 14px 2px;margin:14px 0}.see-also ul,.read-more ul,.sources ul{margin:0;padding-left:18px;font-family:var(--font-ui);font-size:15px}.sources{margin-top:14px;font-family:var(--font-ui);font-size:14px}.sources summary{cursor:pointer;color:var(--ink-soft)}.card-actions{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 8px;font-family:var(--font-ui)}.card-foot{display:flex;justify-content:space-between;gap:8px;font:13px var(--font-ui);color:var(--ink-soft);border-top:1px solid var(--line);padding-top:10px;margin-top:8px}.placeholder{background:var(--bone);border-radius:10px;padding:10px 14px}.hover-label{position:fixed;z-index:30;pointer-events:none;background:var(--ink);color:var(--paper);padding:4px 9px;border-radius:8px;font-size:13px;font-weight:600}.toast{position:fixed;z-index:40;left:50%;bottom:24px;transform:translate(-50%);background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:999px;box-shadow:var(--shadow)}.first-run{position:absolute;z-index:12;left:50%;bottom:22px;transform:translate(-50%);display:flex;gap:8px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:6px 6px 6px 16px;box-shadow:var(--shadow);max-width:calc(100% - 24px)}.loading{position:absolute;left:50%;bottom:70px;transform:translate(-50%);width:min(320px,80%);text-align:center;font-size:13px;color:var(--ink-soft)}.loading-fill{height:4px;border-radius:4px;background:var(--teal);margin-bottom:6px;transition:width .3s}.overlay{position:fixed;z-index:50;inset:0;background:#00000059;display:grid;place-items:center;padding:16px}.dialog{background:var(--paper);border-radius:var(--radius);padding:18px 20px;width:min(520px,100%);max-height:90vh;overflow:auto;box-shadow:var(--shadow)}.dialog-head{display:flex;justify-content:space-between;align-items:center}.dialog h2{margin:0;font:600 22px var(--font-read)}.shortcuts{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px}.shortcuts div{display:contents}.shortcuts dd{margin:0}kbd{font:600 12px var(--font-ui);background:var(--bone);border:1px solid var(--line);border-radius:6px;padding:2px 6px}.fallback{max-width:560px;margin:10vh auto;padding:0 16px;font-family:var(--font-read);font-size:18px}.app.classroom{font-size:23px}.app.classroom .card{font-size:27px}.app.classroom .card-title{font-size:41px}.app.classroom .card-panel{width:560px}.app.classroom .btn{min-height:54px;font-size:23px}.app.classroom .btn.small{min-height:48px;font-size:20px}.laser{position:fixed;z-index:30;width:56px;height:56px;margin:-28px 0 0 -28px;border-radius:50%;border:4px solid var(--coral);box-shadow:0 0 18px var(--coral);pointer-events:none;animation:laser 1.2s ease-out forwards}@keyframes laser{0%{transform:scale(.4);opacity:1}to{transform:scale(1.6);opacity:0}}@media (prefers-reduced-motion: reduce){.laser{animation:laser-fade 1.2s linear forwards}@keyframes laser-fade{to{opacity:0}}}@media (max-width: 1023px){.layers{width:270px}.card-panel{width:360px}}@media (max-width: 599px){.hide-narrow{display:none}.show-narrow{display:block}.brand-name{display:none}.layers{inset:auto auto 8px 8px;width:auto;max-width:calc(100% - 16px);padding:8px}.layers .panel-title{display:none}.layer-row{grid-template-columns:12px 1fr auto;gap:6px}.card-panel{inset:auto 0 0;width:auto;border-radius:18px 18px 0 0;height:45vh;transition:height .25s ease}.card-panel[data-sheet=peek]{height:120px}.card-panel[data-sheet=full]{height:calc(100% - 64px)}.sheet-handle{display:block;width:100%;height:22px;flex:none;cursor:grab;touch-action:none;position:relative}.sheet-handle:after{content:"";position:absolute;left:50%;top:8px;width:42px;height:5px;margin-left:-21px;border-radius:3px;background:var(--line)}.card-body{padding:4px 16px 18px}.card{font-size:17px}.card-title{font-size:23px}.first-run{bottom:auto;top:64px}.app.card-open .layers,.app.card-open .layers-chip{display:none}.layers-chip{top:auto;bottom:12px}}@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}.tours h2,.tour-player .stop-title{font:700 12px/1 var(--font-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin:16px 0 8px}.tour-player .stop-title{font:600 20px/1.25 var(--font-read);letter-spacing:0;text-transform:none;color:var(--ink)}.tour-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.tour-item{display:grid;gap:2px;width:100%;text-align:left;font:inherit;color:var(--ink);background:var(--bone);border:1px solid var(--line);border-radius:12px;padding:10px 12px;cursor:pointer}.tour-item:hover{border-color:var(--teal)}.tour-title{font:600 17px var(--font-read)}.tour-meta{font-size:12px;color:var(--ink-soft)}.tour-summary{font-size:14px}.stop-text{font-size:18px}.back-to-tour{margin:-6px 0 6px -8px}.export-dialog fieldset{border:1px solid var(--line);border-radius:10px;margin:14px 0 0;padding:8px 12px 10px;display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center}.export-dialog legend{font-weight:600;padding:0 4px}.export-dialog .opt{display:inline-flex;align-items:center;gap:6px;min-height:32px;cursor:pointer}.export-dialog>.opt{margin-top:12px}.export-dialog .opt.locked{color:var(--ink-soft);cursor:not-allowed}.export-dialog .lock-tag{font-size:12px;border:1px solid var(--line);border-radius:999px;padding:1px 8px}.export-dialog .link{padding:4px 0}.export-dialog .fine{color:var(--ink-soft);font-size:14px}.export-dialog .dialog-actions{display:flex;justify-content:flex-end}.export-dialog .status{min-height:1.4em;margin:8px 0 0}.offline-dialog .dialog-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.offline-dialog progress{width:100%;margin-top:12px;accent-color:var(--teal)}.offline-dialog .ok{color:var(--teal);font-weight:600}.offline-dialog .status.error{color:var(--coral)}.offline-dialog .fine{color:var(--ink-soft);font-size:14px}.offline-banner,.update-prompt{position:fixed;z-index:40;left:50%;transform:translate(-50%);background:var(--ink);color:var(--paper);border-radius:999px;padding:8px 16px;font-size:14px;box-shadow:var(--shadow);max-width:calc(100vw - 32px)}.offline-banner{top:64px}.update-prompt{bottom:max(16px,env(safe-area-inset-bottom));display:flex;gap:10px;align-items:center}.update-prompt .btn.ghost{color:var(--paper)}.unlock-dialog .dialog-actions{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}.unlock-dialog .fine{color:var(--ink-soft);font-size:14px}.unlock-dialog .notice{border-left:3px solid var(--coral);padding-left:10px}.unlock-form label{display:block;font-weight:600;margin:14px 0 6px}.unlock-form .row{display:flex;gap:8px}.unlock-form input{flex:1;min-width:0;font:inherit;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink)}.unlock-dialog .status.error{color:var(--coral)}.tour-end{font-size:14px}.body-switch button{min-height:32px;padding:7px 12px}.body-switch button:focus-visible{outline:2px solid var(--teal);outline-offset:-2px}