:root{--primary-color:#3b82f6;--secondary-color:#10b981;--danger-color:#ef4444;--warning-color:#f59e0b;--success-color:#10b981;--background-dark:#0f172a;--background-light:#1e293b;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--border-color:#334155;--overlay-bg:rgba(15,23,42,0.95)}.demo-ar-container{background:var(--background-dark);color:var(--text-primary);min-height:100vh;display:flex;flex-direction:column}.demo-header{background:var(--overlay-bg);padding:1rem 2rem;justify-content:space-between;border-bottom:1px solid var(--border-color)}.demo-header,.demo-title{display:flex;align-items:center}.demo-title{gap:.75rem;color:var(--primary-color)}.demo-title h2{margin:0;font-size:1.5rem;font-weight:600}.close-demo-btn{background:none;border:none;color:var(--text-secondary);font-size:2rem;cursor:pointer;padding:.25rem;line-height:1}.close-demo-btn:hover,.loading-screen{color:var(--text-primary)}.loading-screen{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--background-dark);display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:9999}.loading-spinner{border:3px solid rgba(59,130,246,.3);border-top-color:#3b82f6;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin-bottom:1rem}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.demo-content{flex:1;display:grid;grid-template-columns:1fr 400px;gap:2rem;padding:2rem}.camera-section{display:flex;flex-direction:column;gap:1rem}.camera-container{position:relative;background:#000;border-radius:1rem;overflow:hidden;aspect-ratio:16/9}.demo-video{width:100%;height:100%;object-fit:cover}.ar-overlays{position:absolute;inset:0;pointer-events:none}.detection-label{background:rgba(59,130,246,.9);padding:.5rem .75rem;border-radius:.5rem;font-size:.875rem;animation:slideIn .3s ease-out}.analyzing-indicator,.detection-label{position:absolute;color:#fff;display:flex;align-items:center;gap:.5rem}.analyzing-indicator{top:1rem;right:1rem;background:rgba(16,185,129,.9);padding:.75rem 1rem;border-radius:.75rem;font-weight:500}.pulse-dot{width:8px;height:8px;background:#fff;border-radius:50%;animation:pulse 1.5s infinite}.voice-btn{background:var(--primary-color);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:.75rem;display:flex;align-items:center;gap:.5rem;cursor:pointer;font-weight:500;transition:all .3s 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.5rem;color:var(--secondary-color);font-size:1rem}.ai-feedback p{margin:0;color:var(--text-secondary);line-height:1.4}.step-controls{display:flex;gap:1rem}.step-btn{flex:1;padding:.75rem 1rem;border:1px solid var(--border-color);background:var(--background-light);color:var(--text-primary);border-radius:.5rem;cursor:pointer;font-weight:500;transition:all .3s ease}.step-btn:hover:not(:disabled){background:var(--primary-color);border-color:var(--primary-color)}.step-btn:disabled{opacity:.5;cursor:not-allowed}.demo-features{border-top:1px solid var(--border-color);padding-top:1.5rem}.demo-features h4{margin:0 0 1rem;color:var(--text-primary);font-size:1rem}.demo-features ul{list-style:none;padding:0;margin:0}.demo-features li{padding:.5rem 0;color:var(--text-secondary);display:flex;align-items:center;gap:.5rem}.demo-features li:before{content:"✓";color:var(--secondary-color);font-weight:700}.voice-commands-help{margin-bottom:1rem}.voice-commands-help h4{font-size:.875rem;color:var(--primary-color);margin-bottom:.5rem}.voice-commands-help ul{list-style:none;font-size:.75rem;color:var(--text-secondary)}.voice-commands-help li{padding:.25rem 0}.speaking-indicator{display:flex;align-items:center;gap:.75rem;padding:.75rem;background:var(--success-color);color:#fff;border-radius:.5rem;font-size:.875rem;font-weight:500}.speaking-icon{animation:pulse 1s infinite}.sound-waves{display:flex;gap:2px}.wave{width:3px;height:12px;background:#fff;border-radius:1px;animation:wave 1s infinite}.wave:nth-child(2){animation-delay:.1s}.wave:nth-child(3){animation-delay:.2s}@keyframes wave{0%,to{height:12px}50%{height:20px}}.last-command{margin-bottom:1rem;padding:.75rem;background:var(--background-dark);border-radius:.5rem;font-size:.875rem}.command-label{color:var(--text-secondary);margin-right:.5rem}.command-text{color:var(--text-primary);font-style:italic}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}@media (max-width:1024px){.demo-content{grid-template-columns:1fr;gap:1.5rem}.instruction-panel{order:-1}}@media (max-width:768px){.demo-content,.demo-header{padding:1rem}.instruction-panel{padding:1.5rem}}