.arm-lab{padding-bottom:64px}.arm-mode{grid-template-columns:1fr 1fr;gap:12px;margin:10px 0 22px;display:grid}.arm-mode button{text-align:left;background:var(--card);border:1px solid var(--line);cursor:pointer;border-radius:14px;padding:18px 22px;font-weight:700}.arm-mode button[aria-pressed=true]{border-color:var(--teal);box-shadow:inset 0 0 0 1px var(--teal);background:#eaf1ed}.arm-mode span{color:var(--coral-dark);margin-right:10px}.arm-mode small{color:var(--muted);margin-top:6px;font-size:12px;font-weight:400;display:block}.arm-layout{border:1px solid var(--line);background:var(--card);border-radius:22px;grid-template-columns:minmax(0,1fr) 315px;display:grid;overflow:hidden}.arm-stage{background:radial-gradient(at 50% 42%,#fffef8,#e8e8dd);min-width:0;position:relative}.arm-stage-heading{letter-spacing:.13em;color:#506569;justify-content:space-between;gap:12px;padding:24px 24px 15px;font-size:10px;font-weight:700;display:flex}.arm-controls{flex-wrap:wrap;gap:6px;padding:0 20px;display:flex}.arm-controls button,.arm-actions button,.arm-loading button{cursor:pointer;background:#ffffffd9;border:1px solid #ccd3ca;border-radius:8px;padding:9px 12px;font-size:12px}.arm-controls button:disabled{opacity:.45;cursor:wait}.arm-canvas{width:100%;height:600px}.arm-canvas canvas{touch-action:none;max-width:100%;display:block}.arm-canvas-caption{color:#51656b;flex-wrap:wrap;align-items:center;gap:7px 10px;padding:14px 22px 22px;font-size:11px;display:flex}.arm-canvas-caption>span:last-child{margin-left:auto}.arm-dot{background:#e69b55;border-radius:50%;width:9px;height:9px;display:inline-block}.arm-panel{border-left:1px solid var(--line);padding:24px}.arm-layers{gap:9px;display:grid}.arm-layers label{cursor:pointer;align-items:center;gap:9px;font-size:13px;display:flex}.arm-layers span{color:var(--muted);margin-left:auto;font-size:11px}.arm-layers input{accent-color:var(--teal);width:17px;height:17px}.arm-selection{border-block:1px solid var(--line);margin:22px 0;padding:18px 0}.arm-selection small{color:var(--coral-dark);letter-spacing:.1em;font-size:9px;font-weight:700}.arm-selection h2{margin:10px 0;font:26px/1.16 Georgia,serif}.arm-selection p{color:var(--muted);font-size:11px;line-height:1.5}.arm-actions{gap:7px;margin-top:14px;display:flex}.arm-actions button[aria-pressed=true]{color:#fff;background:var(--teal);border-color:var(--teal)}.arm-detail{color:var(--teal);margin-top:18px;font-size:12px;font-weight:700;display:block}.arm-select-label{font-size:12px;font-weight:700}.arm-select-label small{color:var(--muted);margin-top:5px;font-size:10px;font-weight:400;display:block}.arm-panel select{border:1px solid var(--line);background:#fff;border-radius:8px;width:100%;margin-top:9px;padding:11px 6px;font-size:12px}.arm-part-list{gap:3px;max-height:226px;margin-top:12px;display:grid;overflow:auto}.arm-part-list button{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:6px;align-items:center;gap:9px;padding:9px 7px;font-size:11px;display:flex}.arm-part-list button[aria-pressed=true]{color:#7c4422;background:#f7e8d8}.arm-part-list i{border-radius:50%;flex:0 0 8px;width:8px;height:8px}.arm-part-list .bone{background:#c2b395}.arm-part-list .muscle{background:#b7574c}.arm-metrics{color:var(--muted);padding:2px 0;font-size:11px}.arm-source{color:var(--muted);max-width:900px;font-size:11px;line-height:1.65}.arm-source a{text-underline-offset:3px;text-decoration:underline}.arm-comparison{border-top:1px solid var(--line);grid-template-columns:repeat(3,1fr);gap:35px;margin-top:55px;padding-top:30px;display:grid}.arm-comparison h2{margin:12px 0;font:25px/1.15 Georgia,serif}.arm-comparison p:not(.eyebrow){color:var(--muted);font-size:13px;line-height:1.75}.arm-loading{border:1px solid var(--line);text-align:center;background:#fffdf9ed;border-radius:12px;padding:25px;font-size:14px;position:absolute;inset:140px 22px auto}:is(.arm-lab button:focus-visible,.arm-lab select:focus-visible,.arm-lab a:focus-visible){outline-offset:3px;outline:3px solid #207b83}.arm-lab button:hover:not(:disabled){filter:brightness(.96)}@media (max-width:900px){.arm-layout{grid-template-columns:minmax(0,1fr) 270px}.arm-panel{padding:20px}.arm-canvas{height:560px}.arm-stage-heading{padding:20px 16px 15px;font-size:9px}.arm-comparison{gap:20px}}@media (max-width:680px){.arm-mode{gap:8px}.arm-mode button{padding:15px 12px;font-size:13px}.arm-mode small{font-size:10px;line-height:1.5}.arm-layout{grid-template-columns:1fr}.arm-panel{border-left:0;border-top:1px solid var(--line)}.arm-canvas{height:460px}.arm-controls{padding:0 14px}.arm-controls button{padding:9px 11px}.arm-canvas-caption>span:last-child{flex-basis:100%;margin-left:0}.arm-comparison{grid-template-columns:1fr;gap:20px;margin-top:36px}.arm-part-list{max-height:190px}.arm-stage-heading{font-size:8px}.arm-metrics{line-height:1.7}.arm-selection h2{font-size:28px}}.arm-study-nav{flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 20px;display:flex}.arm-study-nav a{border:1px solid var(--line);border-radius:10px;padding:11px 16px;font-size:13px}.arm-study-nav a[aria-current=page]{background:var(--teal);color:#fff;border-color:var(--teal)}.arm-study-nav>span{letter-spacing:.12em;color:var(--muted);text-transform:uppercase;margin-left:auto;font-size:10px}.arm-scope-note{color:#526569;background:#f0f1e9;border-left:2px solid #b6bcae;padding:12px;font-size:11px;line-height:1.65}.arm-selection-dock{border-block:1px solid var(--line);background:#fffdf7;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;padding:16px 20px;display:flex}.arm-selection-title{flex:240px;min-width:0}.arm-selection-title small{letter-spacing:.1em;color:var(--coral-dark);font-size:9px;font-weight:700}.arm-selection-title h2{overflow-wrap:anywhere;margin:6px 0;font:24px/1.2 Georgia,serif}.arm-selection-title .arm-detail{margin:2px 0;font-size:11px;display:inline-block}.arm-selection-dock .arm-actions{flex-wrap:wrap;gap:6px;margin:0}.arm-current-page,.arm-structure-meta{color:var(--muted);font-size:11px}.arm-navigation .viewer-ad-placement{margin:0 0 20px}.arm-navigation .viewer-ad-placement .ad-slot{margin-top:0}@media (max-width:680px){.arm-selection-dock{gap:10px;padding:14px}.arm-selection-title h2{font-size:22px}.arm-selection-dock .arm-actions{width:100%}.arm-selection-dock .arm-actions button{flex:1;padding:10px 7px}}.arm-canvas-wrap{isolation:isolate;position:relative}@media (max-width:680px){.arm-lab[data-region=limb] .arm-canvas-wrap,.arm-lab[data-region=left-limb] .arm-canvas-wrap,.arm-lab[data-region=bilateral] .arm-canvas-wrap,.arm-lab[data-region=body] .arm-canvas-wrap,.arm-lab[data-region=lower-limbs] .arm-canvas-wrap{padding-bottom:64px}}.arm-primary{background:var(--card);flex-direction:column;min-width:0;display:flex}.arm-stage{flex:none}.arm-viewer-ad{border-top:1px solid var(--line);background:#f5f4ee;flex:1;align-content:center;padding:24px;display:grid}.arm-viewer-ad:has(>.ad-slot){min-height:300px}.arm-viewer-ad:not(:has(>.ad-slot)){display:none}.arm-viewer-ad>.ad-slot{color:#667670;background:#eeefe9;border-radius:12px;width:100%;min-height:250px;margin:0}@media (max-width:680px){.arm-viewer-ad{padding:18px 14px}.arm-viewer-ad:has(>.ad-slot){min-height:138px}.arm-viewer-ad>.ad-slot{min-height:100px}}.anatomy-watermark{z-index:1;color:#1029369e;pointer-events:none;-webkit-user-select:none;user-select:none;background:#fffdf8c2;border-radius:8px;grid-template-columns:max-content max-content;align-items:baseline;gap:3px 10px;max-width:calc(100% - 40px);padding:9px 12px;display:grid;position:absolute;bottom:20px;right:20px}.anatomy-watermark strong{letter-spacing:.02em;font:22px/1.15 Georgia,serif}.anatomy-watermark span{letter-spacing:.04em;font-size:11px}.anatomy-watermark small{grid-column:1/-1;font-size:9px;line-height:1.5}.anatomy-watermark-brand{color:inherit;pointer-events:auto;touch-action:manipulation;grid-column:1/-1;align-items:baseline;gap:10px;text-decoration:none;display:flex}.anatomy-watermark-brand:hover{text-underline-offset:3px;color:var(--teal);text-decoration:underline}.arm-bone-guide{flex-wrap:wrap;align-items:center;gap:6px;padding:14px 20px 4px;display:flex}.arm-bone-guide>span{color:var(--muted);margin-right:5px;font-size:11px}.arm-bone-guide button{border:1px solid var(--line);cursor:pointer;background:#fffdf9;border-radius:8px;padding:9px 11px;font-size:11px}.arm-bone-guide button[aria-pressed=true]{background:var(--teal);border-color:var(--teal);color:#fff}.arm-bone-guide button:disabled{opacity:.5;cursor:wait}.arm-anatomy-notes{border-block:1px solid var(--line);padding:14px 0}.arm-anatomy-notes summary{color:var(--teal);cursor:pointer;font-size:13px;font-weight:600}.arm-anatomy-notes summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}.arm-anatomy-notes p{color:var(--muted);font-size:12px;line-height:1.7}.arm-anatomy-notes a{font-size:11px;text-decoration:underline}.arm-anatomy-notes small{color:var(--muted);margin-top:10px;font-size:10px;line-height:1.6;display:block}.arm-study-task{background:#eef1e9;border-radius:6px;padding:10px}.arm-controls button[aria-pressed=true]{background:var(--teal);color:#fff;border-color:var(--teal)}.arm-section-controls{background:#f7faf4;border:1px solid #bdccc6;border-radius:12px;min-width:0;margin:16px 20px 4px;padding:14px}.arm-section-controls legend{color:var(--teal);padding:0 7px;font-size:12px;font-weight:700}.arm-section-options{flex-wrap:wrap;align-items:end;gap:8px;display:flex}.arm-section-options label{flex:180px;gap:5px;font-size:11px;display:grid}.arm-section-options select,.arm-section-options button{border:1px solid var(--line);background:#fff;border-radius:7px;min-width:0;padding:9px;font-size:12px}.arm-section-options button{cursor:pointer}.arm-section-range{flex-wrap:wrap;justify-content:space-between;gap:8px;margin-top:14px;font-size:12px;display:flex}.arm-section-range input{width:100%;accent-color:var(--teal);cursor:ew-resize;min-height:28px;margin:0}.arm-section-controls p{color:var(--muted);margin:9px 0 0;font-size:11px;line-height:1.6}.arm-section-controls p[role=status]{color:var(--teal)}.arm-actions button:disabled{opacity:.45;cursor:not-allowed}.arm-deep-study{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:14px 0;padding:12px 0}.arm-deep-toggle{cursor:pointer;color:var(--teal);text-align:left;background:0 0;border:0;padding:8px 0;font-size:13px;font-weight:600;line-height:1.5}.arm-deep-toggle:disabled{cursor:wait;opacity:.55}.arm-deep-toggle:before{content:"▸ "}.arm-deep-toggle[aria-expanded=true]:before{content:"▾ "}.arm-deep-toggle:focus-visible{outline:3px solid var(--teal);outline-offset:3px}.arm-deep-study p{color:var(--muted);font-size:12px;line-height:1.6}.arm-regional-guide{padding:12px 20px}.arm-regional-guide .arm-bone-guide{padding:8px 0 4px}@media (max-width:680px){.arm-regional-guide{padding:10px 14px}.anatomy-watermark{max-width:calc(100% - 24px);padding:8px 10px;bottom:14px;right:12px}.anatomy-watermark strong{font-size:19px}.anatomy-watermark span{font-size:10px}.arm-bone-guide{padding:12px 14px 2px}.arm-bone-guide>span{flex-basis:100%}}