:root{--primary: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--accent: #10b981;--accent-light: #34d399;--warning: #f59e0b;--danger: #ef4444;--success: #22c55e;--bg-dark: #0f0f1a;--bg-card: #1a1a2e;--bg-card-hover: #252540;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--border-color: rgba(255, 255, 255, .1);--shadow-lg: 0 20px 40px rgba(0, 0, 0, .4);--font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:var(--font-family);background:var(--bg-dark);color:var(--text-primary);overflow:hidden}.screen{position:fixed;top:0;right:0;bottom:0;left:0;overflow:auto}.home-screen{height:100vh;max-height:100vh;padding:20px 30px;display:flex;flex-direction:column;background:linear-gradient(135deg,var(--bg-dark) 0%,#16162d 100%);overflow:hidden}.home-screen.compact .home-content{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:20px;min-height:0}.home-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;flex-shrink:0}.home-header h1{font-size:2.2rem;font-weight:700;background:linear-gradient(135deg,var(--primary-light),var(--accent-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.home-header .subtitle{color:var(--text-secondary);font-size:1.1rem}.home-content{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:30px;max-width:1400px;margin:0 auto;width:100%}.camera-section{display:flex;flex-direction:column;gap:15px;flex:1;min-height:0}.camera-preview{position:relative;background:#000;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg);border:2px solid var(--border-color);flex:1;min-height:200px}.camera-preview video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}.camera-placeholder{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg-card);color:var(--text-muted)}.camera-placeholder .camera-icon{font-size:64px;margin-bottom:10px}.start-button{padding:18px 40px;font-size:1.2rem;font-weight:600;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none;border-radius:12px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;gap:12px;box-shadow:0 4px 20px #6366f166}.start-button:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.start-button:not(:disabled):hover{transform:translateY(-2px);box-shadow:0 6px 30px #6366f180}.start-button.ready{background:linear-gradient(135deg,var(--accent),#059669);box-shadow:0 4px 20px #10b98166}.btn-icon{font-size:1.4rem}.instructions-section{display:flex;flex-direction:column;gap:20px}.instruction-card{background:var(--bg-card);border-radius:16px;padding:24px;border:1px solid var(--border-color)}.instruction-card h3{font-size:1.2rem;margin-bottom:12px;color:var(--primary-light)}.instruction-card h4{font-size:1rem;margin-bottom:10px}.instruction-card p{color:var(--text-secondary);line-height:1.6;margin-bottom:8px}.instruction-card .highlight{background:#6366f126;padding:12px 16px;border-radius:8px;border-left:3px solid var(--primary);margin-top:12px}.dos-donts{display:grid;grid-template-columns:1fr 1fr;gap:20px}.do-col h4{color:var(--success)}.dont-col h4{color:var(--danger)}.dos-donts ul{list-style:none;font-size:.9rem;color:var(--text-secondary)}.dos-donts li{padding:6px 0 6px 20px;position:relative}.do-col li:before{content:"✓";position:absolute;left:0;color:var(--success)}.dont-col li:before{content:"✗";position:absolute;left:0;color:var(--danger)}.demo-info{background:linear-gradient(135deg,#f59e0b1a,#fb923c0d);border-color:#f59e0b4d}.demo-info h4{color:var(--warning)}.home-footer{text-align:center;padding-top:20px;color:var(--text-muted);font-size:.9rem}.demo-screen{position:relative;width:100vw;height:100vh;background:#000}.demo-screen canvas{width:100%;height:100%}.demo-overlay{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.timer-display{position:absolute;top:20px;right:20px;background:#000c;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:12px 20px;border-radius:12px;display:flex;align-items:center;gap:8px;font-size:1.4rem;font-weight:600;border:1px solid rgba(255,255,255,.1);pointer-events:auto}.timer-value{font-variant-numeric:tabular-nums;min-width:30px;text-align:center}.timer-label{color:var(--text-muted);font-size:1rem;font-weight:400}.timer-display.warning{border-color:var(--warning);color:var(--warning)}.timer-display.critical{border-color:var(--danger);color:var(--danger);animation:pulse .5s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.timer-container{position:absolute;top:20px;right:20px;display:flex;align-items:center;gap:8px;pointer-events:auto}.timer-container .timer-display{position:static}.pause-button{background:#000c;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:12px 16px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center}.pause-button:hover{background:#6366f14d;border-color:var(--primary);transform:scale(1.05)}.pause-button:active{transform:scale(.98)}.pause-icon{font-size:1.4rem;line-height:1}.pause-button.paused{background:#10b98133;border-color:var(--accent)}.pause-button.paused:hover{background:#10b9814d}.timer-display.paused{border-color:var(--accent);color:var(--accent-light);animation:none}.timer-display.paused:after{content:"PAUSED";position:absolute;top:100%;left:50%;transform:translate(-50%);font-size:.7rem;color:var(--accent);margin-top:4px;font-weight:600;letter-spacing:.1em}.demo-controls{position:absolute;top:20px;left:20px;background:#000c;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:16px 20px;border-radius:12px;display:flex;flex-direction:column;gap:12px;border:1px solid rgba(255,255,255,.1);pointer-events:auto;min-width:200px}.control-group{display:flex;align-items:center;gap:10px}.control-group label{font-size:.9rem;color:var(--text-secondary)}.control-group input[type=range]{flex:1;height:4px;-webkit-appearance:none;background:#fff3;border-radius:2px}.control-group input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;background:var(--primary);border-radius:50%;cursor:pointer}.checkbox-group{cursor:pointer}.checkbox-group input[type=checkbox]{width:18px;height:18px;accent-color:var(--primary);cursor:pointer}#smoothing-value{font-weight:600;color:var(--primary-light);min-width:30px}.gaze-indicator{position:absolute;width:40px;height:40px;transform:translate(-50%,-50%);display:none}.gaze-dot{width:40px;height:40px;border:3px solid var(--primary);border-radius:50%;background:#6366f133;animation:gaze-pulse 1.5s infinite}@keyframes gaze-pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.2);opacity:.7}}.results-screen{min-height:100vh;padding:40px;display:flex;flex-direction:column;background:linear-gradient(135deg,var(--bg-dark) 0%,#16162d 100%)}.results-header{text-align:center;margin-bottom:40px}.results-header h1{font-size:2.5rem;font-weight:700;margin-bottom:8px}.results-content{flex:1;max-width:1000px;margin:0 auto;width:100%}.comparison-section{display:flex;align-items:center;justify-content:center;gap:30px;margin-bottom:40px}.cost-card{background:var(--bg-card);border-radius:20px;padding:30px;text-align:center;flex:1;max-width:300px;border:2px solid var(--border-color);transition:all .3s ease}.cost-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.full-render{border-color:#ef44444d}.selective-render{border-color:#22c55e4d}.cost-icon{font-size:3rem;margin-bottom:10px}.cost-card h3{font-size:1.3rem;margin-bottom:8px}.cost-description{color:var(--text-muted);font-size:.9rem;margin-bottom:20px}.cost-value{font-size:2.5rem;font-weight:700;margin-bottom:5px}.full-render .cost-value{color:var(--danger)}.selective-render .cost-value{color:var(--success)}.cost-unit{color:var(--text-muted);font-size:.9rem;margin-bottom:15px}.cost-details{font-size:.85rem;color:var(--text-secondary);padding-top:15px;border-top:1px solid var(--border-color)}.vs-indicator{font-size:1.5rem;font-weight:700;color:var(--text-muted);padding:15px}.savings-section{background:var(--bg-card);border-radius:20px;padding:30px;margin-bottom:30px;text-align:center}.savings-section h3{font-size:1.5rem;margin-bottom:20px}.savings-bar-container{background:#ffffff1a;border-radius:12px;height:50px;position:relative;overflow:hidden;margin-bottom:20px}.savings-bar{height:100%;border-radius:12px;transition:width 1s ease-out;display:flex;align-items:center;justify-content:flex-end;padding-right:15px}.savings-bar.high-savings{background:linear-gradient(90deg,var(--accent),#059669)}.savings-bar.medium-savings{background:linear-gradient(90deg,var(--warning),#d97706)}.savings-bar.low-savings{background:linear-gradient(90deg,var(--danger),#dc2626)}.savings-percentage{position:absolute;right:15px;top:50%;transform:translateY(-50%);font-size:1.5rem;font-weight:700;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.3)}.savings-description{color:var(--text-secondary);font-size:1.1rem}#savings-value{color:var(--accent-light)}.session-details{background:var(--bg-card);border-radius:16px;padding:24px;margin-bottom:30px}.session-details h4{margin-bottom:15px;color:var(--text-muted)}.details-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.detail-item{text-align:center}.detail-label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:5px}.detail-value{font-size:1.3rem;font-weight:600;color:var(--primary-light)}.action-buttons{text-align:center}.try-again-btn{padding:16px 40px;font-size:1.2rem;font-weight:600;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none;border-radius:12px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 20px #6366f166}.try-again-btn:hover{transform:translateY(-2px);box-shadow:0 6px 30px #6366f180}.results-footer{text-align:center;padding-top:30px;color:var(--text-muted);font-size:.9rem}.calibration-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000f2;z-index:100;display:flex;align-items:center;justify-content:center}.calibration-content{text-align:center}.calibration-point{width:30px;height:30px;border-radius:50%;background:var(--primary);position:fixed;transform:translate(-50%,-50%);box-shadow:0 0 30px var(--primary),0 0 60px var(--primary);animation:calibration-pulse .8s infinite}@keyframes calibration-pulse{0%,to{transform:translate(-50%,-50%) scale(1)}50%{transform:translate(-50%,-50%) scale(1.3)}}.calibration-status{position:fixed;bottom:50px;left:50%;transform:translate(-50%);font-size:1.2rem;color:var(--text-secondary)}@media (max-width: 1024px){.home-content{grid-template-columns:1fr}.comparison-section{flex-direction:column}.cost-card{max-width:100%}.details-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.home-screen,.results-screen{padding:20px}.home-header h1{font-size:1.6rem}.dos-donts{grid-template-columns:1fr}.details-grid{grid-template-columns:1fr 1fr}}.home-header{display:flex;justify-content:space-between;align-items:center;text-align:left;margin-bottom:30px}.header-content{flex:1}.tutorial-btn{display:flex;align-items:center;gap:8px;padding:10px 20px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;color:var(--text-secondary);font-size:.9rem;cursor:pointer;transition:all .2s}.tutorial-btn:hover{background:var(--bg-card-hover);color:var(--text-primary);border-color:var(--primary)}.tutorial-btn .icon{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:var(--primary);border-radius:50%;color:#fff;font-weight:700;font-size:.8rem}.scene-section{margin-bottom:20px}.scene-section h2{font-size:1rem;color:var(--text-secondary);margin-bottom:15px;font-weight:500}.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.scene-card{position:relative;background:var(--bg-card);border:2px solid var(--border-color);border-radius:16px;overflow:hidden;cursor:pointer;transition:all .3s ease}.scene-card:hover{transform:translateY(-4px);border-color:var(--primary-light);box-shadow:0 10px 30px #6366f133}.scene-card.selected{border-color:var(--primary);box-shadow:0 0 0 3px #6366f14d}.scene-thumbnail{height:100px;background-size:cover;background-position:center}.scene-info{padding:15px}.scene-name{font-size:1rem;font-weight:600;margin-bottom:5px}.scene-desc{font-size:.8rem;color:var(--text-muted);line-height:1.4}.scene-badge{position:absolute;top:10px;right:10px;width:24px;height:24px;background:var(--primary);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(.5);transition:all .2s}.scene-card.selected .scene-badge{opacity:1;transform:scale(1)}.check-icon{color:#fff;font-size:.8rem}.camera-container{display:flex;flex-direction:column;gap:10px}.camera-status{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--bg-card);border-radius:10px;font-size:.9rem}.status-dot{width:10px;height:10px;border-radius:50%;background:var(--text-muted);transition:all .3s}.status-dot.detected{background:var(--warning)}.status-dot.ready{background:var(--success);box-shadow:0 0 8px var(--success)}.status-text{color:var(--text-secondary)}.quick-tips{display:flex;gap:20px;margin-top:10px}.tip{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-muted)}.tip-icon{font-size:1rem}.start-button{display:flex;align-items:center;justify-content:center;gap:10px;padding:16px 32px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);border:none;border-radius:14px;color:#fff;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s;width:100%}.start-button:disabled{opacity:.5;cursor:not-allowed}.start-button.ready{background:linear-gradient(135deg,var(--accent) 0%,#059669 100%);box-shadow:0 8px 24px #10b98166}.start-button:not(:disabled):hover{transform:translateY(-2px);box-shadow:0 12px 32px #6366f166}.btn-arrow{transition:transform .2s}.start-button:hover .btn-arrow{transform:translate(4px)}.spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.tutorial-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;opacity:1;transition:opacity .3s}.tutorial-overlay.hidden{opacity:0;pointer-events:none}.tutorial-modal{position:relative;background:var(--bg-card);border:1px solid var(--border-color);border-radius:24px;padding:40px;max-width:480px;width:90%;text-align:center;box-shadow:var(--shadow-lg)}.tutorial-close{position:absolute;top:15px;right:15px;width:32px;height:32px;background:transparent;border:1px solid var(--border-color);border-radius:8px;color:var(--text-muted);font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.tutorial-close:hover{background:var(--bg-card-hover);color:var(--text-primary)}.tutorial-icon{font-size:3rem;margin-bottom:20px}.tutorial-title{font-size:1.4rem;font-weight:600;margin-bottom:15px}.tutorial-content{color:var(--text-secondary);line-height:1.6;margin-bottom:30px}.tutorial-progress{margin-bottom:25px}.tutorial-dots{display:flex;justify-content:center;gap:10px}.tutorial-dot{width:10px;height:10px;border-radius:50%;background:var(--border-color);cursor:pointer;transition:all .2s}.tutorial-dot:hover{background:var(--text-muted)}.tutorial-dot.active{background:var(--primary);width:24px;border-radius:5px}.tutorial-actions{display:flex;gap:15px;justify-content:center}.tutorial-prev,.tutorial-next{padding:12px 24px;border-radius:10px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s}.tutorial-prev{background:transparent;border:1px solid var(--border-color);color:var(--text-secondary)}.tutorial-prev:hover{background:var(--bg-card-hover);color:var(--text-primary)}.tutorial-next{background:var(--primary);border:none;color:#fff}.tutorial-next:hover{background:var(--primary-dark);transform:translateY(-2px)}@media (max-width: 1024px){.scene-grid{grid-template-columns:repeat(2,1fr)}.home-header{flex-direction:column;text-align:center;gap:20px}}@media (max-width: 640px){.scene-grid{grid-template-columns:1fr}.quick-tips{flex-direction:column;gap:10px}}.header-actions{display:flex;align-items:center;gap:12px}.renderer-badge{padding:6px 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.start-button{flex:1;padding:14px 24px;font-size:1rem}.home-footer.compact{padding:10px 0;flex-shrink:0}.home-footer.compact p{font-size:.75rem;color:var(--text-muted)}.tutorial-step-num{font-size:.85rem;color:var(--primary);font-weight:600;text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}.camera-preview video{width:100%;height:100%;object-fit:cover}.left-panel{display:flex;flex-direction:column;gap:15px;min-height:0;overflow:hidden}.info-section{display:flex;flex-direction:column;gap:12px}.info-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:16px}.info-card h3{font-size:.9rem;font-weight:600;margin-bottom:8px;color:var(--text-primary)}.info-card p{font-size:.8rem;line-height:1.5;color:var(--text-secondary)}.info-card strong{color:var(--text-primary)}.calibration-info{border-left:3px solid var(--primary)}.performance-note{border-left:3px solid var(--warning);background:#f59e0b0d}.requirements-list{display:flex;justify-content:center;gap:20px;margin-top:10px;padding:12px;background:var(--bg-card);border-radius:10px}.req-item{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--text-secondary)}.req-icon{width:18px;height:18px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:.7rem;font-weight:700}.req-icon.check{background:#10b98133;color:var(--accent)}.scene-section.compact{flex-shrink:0}.scene-grid.compact{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.camera-section.compact{display:flex;flex-direction:column;gap:12px;flex:1;min-height:0}.camera-container.compact{flex:1;min-height:0;display:flex;flex-direction:column}.camera-container.compact .camera-preview{flex:1;min-height:200px;border-radius:16px;overflow:hidden;border:2px solid var(--border-color)}.home-footer.compact{text-align:center}@media (max-width: 1024px){.home-screen.compact .home-content{grid-template-columns:1fr;gap:15px}.scene-grid.compact{grid-template-columns:repeat(3,1fr)}.left-panel{order:2}.camera-section.compact{order:1}.info-section{flex-direction:row}.info-card{flex:1}.camera-container.compact .camera-preview{height:200px}}.camera-overlay-controls{position:absolute;bottom:0;left:0;right:0;padding:15px;background:linear-gradient(transparent,#000c);display:flex;align-items:center;gap:15px}.camera-overlay-controls .camera-status{flex:1;background:#00000080;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.camera-overlay-controls .start-button{flex:1;padding:12px 20px;font-size:.95rem}.camera-preview{position:relative}.requirements-list{flex-shrink:0}.action-section{display:flex;flex-direction:column;gap:12px;margin-top:auto;padding-top:15px}.action-section .camera-status{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--bg-card);border-radius:10px;font-size:.9rem}.action-section .start-button{width:100%;padding:16px;font-size:1.1rem}.calibration-instructions{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;z-index:100}.instruction-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:24px;padding:40px 50px;max-width:500px;text-align:center;box-shadow:var(--shadow-lg)}.instruction-card h2{font-size:1.5rem;font-weight:600;margin-bottom:30px;color:var(--text-primary)}.instruction-steps{display:flex;flex-direction:column;gap:15px;text-align:left;margin-bottom:25px}.instruction-steps .step{display:flex;align-items:center;gap:15px;color:var(--text-secondary);font-size:.95rem}.step-num{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;border-radius:50%;font-weight:600;font-size:.85rem;flex-shrink:0}.instruction-note{color:var(--text-muted);font-size:.85rem;margin-bottom:25px}.begin-calibration-btn{display:inline-block;padding:16px 40px;background:linear-gradient(135deg,var(--accent) 0%,#059669 100%);border:none;border-radius:12px;color:#fff;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s}.begin-calibration-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px #10b98166}.stats-overlay{position:absolute;top:15px;right:15px;display:flex;gap:10px;z-index:10}.stat-pill{display:flex;align-items:center;gap:6px;padding:6px 12px;background:#0009;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);border-radius:20px;font-size:.85rem;color:#fff;font-family:JetBrains Mono,monospace;box-shadow:0 4px 6px #0000001a}.stat-icon{font-size:.9rem}#stat-fps{font-weight:700;color:var(--accent)}