:root{--bg-primary: #0f0f1a;--bg-secondary: #1a1a2e;--bg-card: #16213e;--accent: #00bfff;--accent-glow: rgba(0, 191, 255, .3);--success: #00ff88;--warning: #ffaa00;--error: #ff4444;--text-primary: #e0e0e0;--text-secondary: #888;--text-muted: #555;--border: #2a2a4a;--radius: 12px;--shadow: 0 4px 20px rgba(0, 0, 0, .5)}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);-webkit-user-select:none;user-select:none;touch-action:manipulation}#app{display:flex;flex-direction:column;height:100%;max-width:100vw}header{display:flex;justify-content:space-between;align-items:center;padding:8px 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border);z-index:10;height:48px;flex-shrink:0}.logo{font-size:18px;font-weight:800;letter-spacing:2px;color:var(--text-primary)}.logo .accent{color:var(--accent)}.header-right{display:flex;align-items:center;gap:12px}.fps{font-family:SF Mono,Fira Code,monospace;font-size:12px;color:var(--text-secondary)}#camera-container{flex:1;position:relative;overflow:hidden;background:#000;display:flex;justify-content:center;align-items:center}#video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}#overlay{position:absolute;top:0;left:0;width:100%;height:100%;transform:scaleX(-1);pointer-events:none}#hud{position:absolute;top:0;left:0;right:0;padding:12px 16px;display:flex;justify-content:space-between;pointer-events:none;z-index:5}.hud-item{display:flex;flex-direction:column;align-items:center;background:#0f0f1abf;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:6px 14px;border-radius:8px;border:1px solid rgba(255,255,255,.1)}.hud-label{font-size:10px;font-weight:700;letter-spacing:1px;color:var(--text-secondary)}.hud-value{font-family:SF Mono,Fira Code,monospace;font-size:28px;font-weight:800;line-height:1}.hud-exercise{font-size:14px;font-weight:700;letter-spacing:2px;color:var(--accent)}.hud-phase{font-size:10px;color:var(--text-muted);letter-spacing:1px}.score-good{color:var(--success)}.score-warning{color:var(--warning)}.score-bad{color:var(--error)}#view-warning{position:absolute;bottom:80px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:8px;background:#ffaa00e6;color:#000;padding:8px 16px;border-radius:8px;font-size:13px;font-weight:600;z-index:5;white-space:nowrap}#cue-toast{position:absolute;bottom:120px;left:50%;transform:translate(-50%);background:#0f0f1ae6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:2px solid var(--accent);padding:12px 24px;border-radius:12px;font-size:18px;font-weight:700;color:var(--text-primary);text-transform:uppercase;letter-spacing:1px;z-index:5;animation:fadeInUp .3s ease;white-space:nowrap}#cue-toast.error{border-color:var(--error);color:var(--error)}#cue-toast.success{border-color:var(--success);color:var(--success)}@keyframes fadeInUp{0%{opacity:0;transform:translate(-50%) translateY(10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}#no-pose{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:var(--text-secondary);z-index:5}#no-pose p{font-size:18px;font-weight:600}#no-pose .small{font-size:14px;margin-top:4px;color:var(--text-muted)}#controls{display:flex;align-items:center;justify-content:center;gap:12px;padding:12px 16px;background:var(--bg-secondary);border-top:1px solid var(--border);flex-shrink:0}.mode-toggle{display:flex;border-radius:8px;overflow:hidden;border:1px solid var(--border)}.mode-btn{padding:8px 14px;font-size:13px;font-weight:600;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;transition:all .2s}.mode-btn.active{background:var(--accent);color:#000}.control-btn{height:48px;padding:0 24px;border:none;border-radius:24px;font-size:16px;font-weight:700;letter-spacing:1px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:8px}.control-btn.primary{background:var(--accent);color:#000;min-width:140px}.control-btn.primary:hover{background:#3cf;box-shadow:0 0 20px var(--accent-glow)}.control-btn.primary.active{background:var(--error);color:#fff}.control-btn.primary.active:hover{background:#f66}.control-btn.secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border);font-size:13px;padding:0 16px}.control-btn.secondary:hover{background:var(--border)}.icon-btn{width:48px;height:48px;padding:0;background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.icon-btn:hover{background:var(--border)}.control-select{height:42px;padding:0 12px;background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border);border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;outline:none}.control-select option{background:var(--bg-secondary)}.settings-backdrop,.summary-backdrop{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;z-index:99}.settings-content,.summary-content{position:fixed;bottom:0;left:0;right:0;max-height:70vh;background:var(--bg-secondary);border-radius:var(--radius) var(--radius) 0 0;padding:20px;z-index:100;overflow-y:auto;animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.settings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.settings-header h2{font-size:20px;font-weight:700}.settings-header .icon-btn{font-size:24px;width:36px;height:36px;border:none}.setting-group{margin-bottom:20px}.setting-group label{display:block;font-size:14px;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.slider{width:100%;-webkit-appearance:none;-moz-appearance:none;appearance:none;height:6px;background:var(--border);border-radius:3px;outline:none}.slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;background:var(--accent);border-radius:50%;cursor:pointer}.slider-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--text-muted);margin-top:4px}.summary-content h2{text-align:center;margin-bottom:20px;font-size:22px}#summary-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px}.stat-card{background:var(--bg-card);border-radius:8px;padding:12px;text-align:center}.stat-card .stat-value{font-family:SF Mono,Fira Code,monospace;font-size:24px;font-weight:800;color:var(--accent)}.stat-card .stat-label{font-size:11px;color:var(--text-secondary);letter-spacing:1px;margin-top:4px}#summary-reps{max-height:200px;overflow-y:auto;margin-bottom:20px}.rep-row{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;border-bottom:1px solid var(--border);font-size:14px}.rep-row .rep-num{font-weight:700;color:var(--text-secondary)}.rep-row .rep-score{font-family:SF Mono,Fira Code,monospace;font-weight:700}.rep-row .rep-issues{font-size:12px;color:var(--text-muted)}#loading-screen{position:fixed;top:0;left:0;right:0;bottom:0;background:var(--bg-primary);display:flex;align-items:center;justify-content:center;z-index:200;transition:opacity .5s ease}#loading-screen.fade-out{opacity:0;pointer-events:none}.loading-content{text-align:center}.loading-spinner{width:48px;height:48px;border:4px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}.loading-content p{font-size:16px;font-weight:600}.loading-content .small{font-size:13px;color:var(--text-secondary);margin-top:4px}.hidden{display:none!important}@media(min-width:768px){#camera-container{max-width:800px;margin:0 auto}#controls{max-width:800px;margin:0 auto;width:100%}}#spine-gauge{position:absolute;right:16px;top:50%;transform:translateY(-50%);width:8px;height:120px;background:var(--border);border-radius:4px;overflow:hidden;z-index:5}#spine-gauge-fill{position:absolute;bottom:0;width:100%;background:var(--success);border-radius:4px;transition:height .3s ease,background .3s ease}.full-width{width:100%}.setting-hint{display:block;font-size:11px;color:var(--text-muted);margin-top:4px}.history-backdrop{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;z-index:99}.history-content{position:fixed;bottom:0;left:0;right:0;max-height:75vh;background:var(--bg-secondary);border-radius:var(--radius) var(--radius) 0 0;padding:20px;z-index:100;overflow-y:auto;animation:slideUp .3s ease}.history-list{display:flex;flex-direction:column;gap:12px}.empty-state{text-align:center;color:var(--text-muted);padding:40px 0;font-size:14px}.history-card{background:var(--bg-card);border-radius:8px;padding:12px 16px;border:1px solid var(--border)}.history-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.history-exercise{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px}.history-date{font-size:12px;color:var(--text-muted)}.history-card-stats{display:flex;justify-content:space-around}.history-stat{display:flex;flex-direction:column;align-items:center}.history-stat-value{font-family:SF Mono,Fira Code,monospace;font-size:18px;font-weight:700;color:var(--text-primary)}.history-stat-label{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.video-player-overlay{position:fixed;top:0;left:0;right:0;bottom:0;z-index:150}.video-player-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#000c}.video-player-content{position:relative;z-index:1;display:flex;flex-direction:column;height:100%;padding:16px}.video-player-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.video-player-header h3{font-size:18px;font-weight:700}.video-player-video{flex:1;width:100%;max-height:60vh;background:#000;border-radius:8px;object-fit:contain}.video-player-timeline{margin:12px 0;height:24px}.timeline-bar{position:relative;height:6px;background:var(--border);border-radius:3px;margin-top:9px}.timeline-marker{position:absolute;top:-6px;width:4px;height:18px;border-radius:2px;transform:translate(-50%)}.video-player-actions{display:flex;justify-content:center;padding-top:8px}.gait-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:12px 0}.gait-metric-card{background:var(--bg-card);border-radius:8px;padding:10px 12px;text-align:center;border:1px solid var(--border)}.gait-metric-value{font-family:SF Mono,Fira Code,monospace;font-size:20px;font-weight:700;color:var(--accent)}.gait-metric-label{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-top:2px}.gait-metric-unit{font-size:12px;color:var(--text-secondary)}.gait-recommendations{margin-top:16px}.gait-recommendations h4{font-size:14px;font-weight:700;margin-bottom:8px;color:var(--text-secondary)}.gait-rec-item{display:flex;align-items:flex-start;gap:8px;padding:8px 0;border-bottom:1px solid var(--border);font-size:13px}.gait-rec-icon{flex-shrink:0;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700}.gait-rec-icon.warning{background:var(--warning);color:#000}.gait-rec-icon.good{background:var(--success);color:#000}.skill-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:10px;font-weight:700;letter-spacing:.5px;text-transform:uppercase}.skill-badge.beginner{background:var(--success);color:#000}.skill-badge.intermediate{background:var(--accent);color:#000}.skill-badge.advanced{background:var(--warning);color:#000}.rest-timer-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#0f0f1ad9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:2px solid var(--accent);border-radius:16px;padding:20px 32px;text-align:center;z-index:8}.rest-timer-value{font-family:SF Mono,Fira Code,monospace;font-size:48px;font-weight:800;color:var(--accent)}.rest-timer-label{font-size:12px;color:var(--text-secondary);letter-spacing:1px;text-transform:uppercase;margin-top:4px}