:root{--bg:#0e1319;--panel:#1a212b;--panel-2:#141b23;--border:#2b3644;--border-strong:#3d4c5e;--text:#e3eaf3;--muted:#93a7bc;--accent:#40d3e8;--accent-2:#25a9bf;--shadow-1:0 1px 2px #00000059, 0 2px 6px #00000038;--radius:8px;--font-ui:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{color:var(--text);font-family:var(--font-ui);overscroll-behavior:none;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;-webkit-text-size-adjust:100%;background:radial-gradient(120% 120% at 50% -10%,#1d2631 0%,#131a22 42%,#0d1218 100%);font-size:14px;overflow:hidden}#app{flex-direction:column;height:100%;display:flex}@supports (height:100dvh){#app{height:100dvh}}button,label,input[type=radio],input[type=checkbox],input[type=range]{touch-action:manipulation}#topbar{background:linear-gradient(180deg, #222c38 0%, var(--panel) 100%);border-bottom:1px solid var(--border);box-shadow:var(--shadow-1);z-index:10;justify-content:space-between;align-items:center;gap:12px;padding:9px 16px;display:flex}#app-brand{align-items:baseline;gap:12px;min-width:0;display:flex}#app-title{letter-spacing:.02em;white-space:nowrap;color:#f2f6fb;align-items:center;gap:9px;font-size:16px;font-weight:650;display:inline-flex}#app-title:before{content:"";background:linear-gradient(135deg, var(--accent), var(--accent-2));border-radius:4px;flex-shrink:0;width:12px;height:12px;box-shadow:0 0 0 3px #40d3e824}#app-subtitle{letter-spacing:.12em;text-transform:uppercase;color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:11px;font-weight:500;overflow:hidden}#topbar-actions{align-items:center;gap:8px;display:flex}#help-btn{width:28px;height:28px;color:var(--accent);border:1px solid var(--border);cursor:pointer;background:#26313d;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;padding:0;font-size:15px;font-weight:700;line-height:1;transition:background-color .15s,border-color .15s,transform 40ms;display:inline-flex}#help-btn:hover{border-color:var(--accent);background:#2e3946}#help-btn:active{transform:translateY(1px)}#workspace{flex:1;min-height:0;display:flex;overflow:hidden}#viewport-3d{flex:1 1 0;min-width:0;min-height:0;position:relative;overflow:hidden}#viewport-3d canvas{display:block;position:absolute;top:0;bottom:0;left:0;right:0;width:100%!important;height:100%!important}#loading-indicator{z-index:5;background:var(--bg);color:var(--muted);letter-spacing:.03em;pointer-events:none;justify-content:center;align-items:center;gap:10px;font-size:13px;display:flex;position:absolute;top:0;bottom:0;left:0;right:0}#loading-indicator .spinner{border:2px solid #2c3440;border-top-color:var(--accent);border-radius:50%;width:18px;height:18px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){#loading-indicator .spinner{border-top-color:var(--muted);animation:none}}#fluoro-panel{z-index:1;background:var(--panel);border-left:1px solid var(--border);flex-direction:column;flex-shrink:0;width:max(320px,min(30vw,440px));min-width:300px;max-width:45vw;display:flex;position:relative;overflow:hidden}#fluoro-header{border-bottom:1px solid var(--border);background:linear-gradient(#222c38 0%,#0000 100%);align-items:center;gap:10px;padding:9px 12px;display:flex}#fluoro-header h2{text-transform:uppercase;letter-spacing:.1em;color:var(--muted);align-items:center;gap:7px;margin:0;font-size:11.5px;font-weight:600;display:flex}#fluoro-header h2:before{content:"";background:var(--accent);border-radius:50%;flex-shrink:0;width:4px;height:4px}#fluoro-angle{font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--text);border:1px solid var(--border);background:#22303e;border-radius:6px;margin-left:auto;padding:2px 8px;font-size:12px;font-weight:600}.fluoro-check{color:var(--muted);align-items:center;gap:5px;font-size:12px;display:flex}.fluoro-check input{accent-color:var(--accent)}#fluoro-controls{border-bottom:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:6px 8px;padding:6px 12px;display:flex}.fluoro-inject-btn{color:var(--accent);cursor:pointer;background:#22303e;border:1px solid #40d3e880;border-radius:6px;margin-left:auto;padding:5px 14px;font-size:12px;font-weight:650;transition:background-color .15s,border-color .15s,box-shadow .15s,transform 40ms}.fluoro-inject-btn:hover{border-color:var(--accent);box-shadow:var(--shadow-1);background:#2b3947}.fluoro-inject-btn:active{transform:translateY(1px)}.fluoro-controls-spacer{width:8px}.fluoro-zoom-group{align-items:center;gap:6px;display:inline-flex}.fluoro-zoom-btn{width:26px;height:26px;color:var(--text);border:1px solid var(--border);cursor:pointer;background:#22303e;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;font-size:15px;line-height:1;transition:background-color .15s,border-color .15s,transform 40ms;display:inline-flex}.fluoro-zoom-btn:hover{border-color:var(--border-strong);background:#2b3947}.fluoro-zoom-btn:active{transform:translateY(1px)}.fluoro-zoom-label{text-align:center;white-space:nowrap;font-variant-numeric:tabular-nums;min-width:64px;color:var(--muted);font-size:11px}#fluoro-canvas-wrap{border-top:1px solid var(--border);background:#000;flex:1;min-height:0;position:relative;box-shadow:inset 0 0 0 1px #ffffff08,inset 0 0 40px #0000008c}#fluoro-canvas-wrap canvas{position:absolute;top:0;bottom:0;left:0;right:0;width:100%!important;height:100%!important}#side-panel{background:var(--panel);border-left:1px solid var(--border);scrollbar-width:thin;scrollbar-color:var(--border) transparent;width:max(210px,min(17vw,260px));padding:10px;overflow-y:auto}#side-panel section{background:var(--panel-2);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;padding:12px}#side-panel section:last-child{margin-bottom:0}#side-panel h2{text-transform:uppercase;letter-spacing:.1em;color:var(--muted);align-items:center;gap:7px;margin-bottom:10px;font-size:11.5px;font-weight:600;display:flex}#side-panel h2:before{content:"";background:var(--accent);border-radius:50%;flex-shrink:0;width:4px;height:4px}#side-panel::-webkit-scrollbar{width:8px}#side-panel::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}#side-panel::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}.coronary-check{color:var(--text);cursor:pointer;align-items:center;gap:6px;padding:3px 0;font-size:12px;display:flex}.coronary-check input{accent-color:var(--accent)}#coronary-controls{flex-direction:column;gap:2px;display:flex}#case-controls{flex-direction:column;gap:6px;display:flex}.case-btn.active{background:var(--accent);color:#0c1116;border-color:var(--accent)}#angle-readout{font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--text);border:1px solid var(--border);background:#22303e;border-radius:6px;margin-bottom:10px;padding:6px 9px;font-size:15px;font-weight:650}#preset-list{flex-direction:column;gap:6px;display:flex}.preset-btn{color:var(--text);border:1px solid var(--border);text-align:left;cursor:pointer;background:#22303e;border-radius:6px;padding:7px 9px;font-size:13px;transition:background-color .15s,border-color .15s,box-shadow .15s,transform 40ms}.preset-btn:hover{border-color:var(--border-strong);box-shadow:var(--shadow-1);background:#2b3947}.preset-btn:active{transform:translateY(1px)}.preset-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.step-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.motion-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.fluoro-inject-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.fluoro-zoom-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}#help-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.tutorial-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}#step-controls{grid-template-columns:1fr 1fr;gap:6px;margin-top:10px;display:grid}.step-btn{color:var(--text);border:1px solid var(--border);text-align:center;cursor:pointer;background:#22303e;border-radius:6px;padding:7px 9px;font-size:13px;transition:background-color .15s,border-color .15s,box-shadow .15s,transform 40ms}.step-btn:hover{border-color:var(--border-strong);box-shadow:var(--shadow-1);background:#2b3947}.step-btn:active{transform:translateY(1px)}.motion-row{align-items:center;gap:8px;margin-bottom:8px;display:flex}.motion-row input[type=checkbox]{accent-color:var(--accent);width:14px;height:14px}.motion-row label{font-size:13px}.motion-row input[type=range]{min-width:0;accent-color:var(--accent);flex:1}.motion-slider-label{min-width:76px;color:var(--muted)}.motion-btn{width:100%;color:var(--text);border:1px solid var(--border);cursor:pointer;background:#22303e;border-radius:6px;padding:7px 9px;font-size:13px;transition:background-color .15s,border-color .15s,box-shadow .15s,transform 40ms}.motion-btn:hover{border-color:var(--border-strong);box-shadow:var(--shadow-1);background:#2b3947}.motion-btn:active{transform:translateY(1px)}#bottombar{background:linear-gradient(180deg, var(--panel) 0%, #171e27 100%);border-top:1px solid var(--border);color:var(--muted);justify-content:space-between;align-items:center;gap:12px;padding:6px 16px;font-size:12px;display:flex}#fps-readout{font-variant-numeric:tabular-nums;color:var(--muted);border:1px solid var(--border);white-space:nowrap;background:#22303e;border-radius:6px;padding:1px 8px}#view-tabs{display:none}@media (max-width:960px){#workspace{-webkit-overflow-scrolling:touch;flex-direction:column;overflow-y:auto}#viewport-3d{width:100%;height:60vh;height:60dvh;min-height:360px;max-height:70vh;flex:none;max-height:70dvh}#fluoro-panel{width:100%;min-width:0;max-width:100%;height:50vh;border-left:none;border-top:1px solid var(--border);height:50dvh;min-height:300px}#side-panel{border-left:none;border-top:1px solid var(--border);width:100%}}@media (max-width:600px){#workspace{flex-direction:column;overflow:hidden}#workspace>[data-view]{display:none}#workspace>[data-view].active-view{border:none;flex:1 1 0;width:100%;min-width:0;max-width:100%;min-height:0}#viewport-3d.active-view{display:block}#fluoro-panel.active-view{flex-direction:column;display:flex}#side-panel.active-view{-webkit-overflow-scrolling:touch;display:block;overflow-y:auto}#view-tabs{background:var(--panel);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom,0px);z-index:30;flex-shrink:0;display:flex}.view-tab{min-height:50px;color:var(--muted);letter-spacing:.04em;cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border:none;flex:1 1 0;font-size:13px;font-weight:600}.view-tab+.view-tab{border-left:1px solid var(--border)}.view-tab.active{color:var(--accent);box-shadow:inset 0 -2px 0 var(--accent)}#topbar{padding:6px 10px;padding-top:calc(6px + env(safe-area-inset-top,0px))}#app-title{font-size:15px}#app-subtitle{display:none}#bottombar{padding:4px 10px;font-size:11px}#help-text{display:none}.preset-btn,.step-btn,.motion-btn{min-height:44px;font-size:14px}.fluoro-inject-btn{min-height:40px}.fluoro-zoom-btn{width:40px;height:40px}.motion-row{min-height:44px}.motion-row input[type=range]{height:28px}#fluoro-controls{flex-wrap:wrap;row-gap:8px}}@media (hover:none) and (max-width:600px){input,button,select,textarea{font-size:16px}}.tutorial-overlay{z-index:100;pointer-events:none;opacity:0;visibility:hidden;transition:opacity .22s,visibility .22s;position:fixed;top:0;bottom:0;left:0;right:0}.tutorial-overlay.is-open{opacity:1;visibility:visible}#tutorial-spotlight{z-index:101;pointer-events:none;border:2px solid var(--accent);border-radius:8px;transition:left .28s,top .28s,width .28s,height .28s;display:none;position:fixed;box-shadow:0 0 0 9999px #080b0f9e,0 0 22px #39c2d773}#tutorial-spotlight:after{content:"";pointer-events:none;border:2px solid #39c2d759;border-radius:10px;animation:1.8s ease-in-out infinite tutorial-pulse;position:absolute;top:-7px;bottom:-7px;left:-7px;right:-7px}@keyframes tutorial-pulse{0%,to{opacity:.25;transform:scale(1)}50%{opacity:1;transform:scale(1.03)}}#tutorial-tooltip{z-index:102;pointer-events:auto;background:var(--panel);border:1px solid var(--border);border-radius:12px;width:min(320px,92vw);position:fixed;overflow:hidden;box-shadow:0 14px 40px #0000008c}.tutorial-tip-header{align-items:center;gap:10px;padding:10px 10px 8px 14px;display:flex}#tutorial-step-label{letter-spacing:.06em;color:var(--muted);border:1px solid var(--border);white-space:nowrap;background:#161d24;border-radius:10px;padding:2px 8px;font-size:11px;font-weight:700}#tutorial-title{color:var(--text);flex:1;margin:0;font-size:14px}.tutorial-close{width:26px;height:26px;color:var(--muted);border:1px solid var(--border);cursor:pointer;background:#161d24;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;line-height:1;display:inline-flex}.tutorial-close:hover{color:var(--text);border-color:var(--accent)}.tutorial-body{color:var(--text);padding:0 14px 10px;font-size:13.5px;line-height:1.55}.tutorial-body p{margin:0}.tutorial-body strong{color:var(--accent)}.tutorial-body kbd{border:1px solid var(--border);color:var(--text);background:#161d24;border-radius:4px;padding:1px 6px;font-family:inherit;font-size:12px}.tutorial-tip-footer{border-top:1px solid var(--border);align-items:center;gap:8px;padding:10px 12px 12px;display:flex}.tutorial-spacer{flex:1}.tutorial-btn{border:1px solid var(--border);min-height:38px;color:var(--text);cursor:pointer;background:#252d38;border-radius:6px;padding:6px 14px;font-size:13.5px;font-weight:600}.tutorial-btn:hover:not(:disabled){border-color:var(--accent);background:#2e3946}.tutorial-btn:disabled{opacity:.45;cursor:default}.tutorial-btn-ghost{color:var(--muted);background:0 0}.tutorial-btn-primary{background:var(--accent);border-color:var(--accent);color:#0c1116}.tutorial-btn-primary:hover:not(:disabled){background:#4cd0e2}@media (prefers-reduced-motion:reduce){.tutorial-overlay,#tutorial-spotlight{transition:none}#tutorial-spotlight:after{animation:none}}@media (max-width:600px){#help-btn{width:40px;height:40px;font-size:18px}}