:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-card: rgba(255, 255, 255, .03);--bg-glass: rgba(255, 255, 255, .05);--text-primary: #ffffff;--text-secondary: rgba(255, 255, 255, .7);--text-muted: rgba(255, 255, 255, .4);--accent-primary: #6366f1;--accent-secondary: #818cf8;--accent-glow: rgba(99, 102, 241, .4);--success: #10b981;--warning: #f59e0b;--error: #ef4444;--border-subtle: rgba(255, 255, 255, .08);--border-accent: rgba(99, 102, 241, .3);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--radius-full: 9999px;--shadow-glow: 0 0 40px var(--accent-glow);--shadow-card: 0 4px 24px rgba(0, 0, 0, .4);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);overflow:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#app{height:100%;width:100%;position:relative}.screen{position:absolute;inset:0;display:none;flex-direction:column;opacity:0;transition:opacity var(--transition-normal)}.screen.active{display:flex;opacity:1}#loading-screen{align-items:center;justify-content:center;background:var(--bg-primary)}.loading-content{text-align:center}.loading-content h1{font-size:2rem;font-weight:700;margin-bottom:.5rem;background:linear-gradient(135deg,var(--text-primary),var(--accent-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.spinner{width:48px;height:48px;border:3px solid var(--border-subtle);border-top-color:var(--accent-primary);border-radius:50%;margin:0 auto 1.5rem;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}#loading-status{color:var(--text-secondary);font-size:.9rem}#intro-screen{padding:2rem;overflow-y:auto}.intro-content{max-width:400px;margin:0 auto;text-align:center;padding-top:3rem}.intro-content h1{font-size:2.5rem;font-weight:800;margin-bottom:.5rem;background:linear-gradient(135deg,var(--text-primary) 0%,var(--accent-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{font-size:1.1rem;color:var(--text-secondary);margin-bottom:2.5rem}.steps-preview{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:2.5rem;padding:1.5rem;background:var(--bg-glass);border-radius:var(--radius-lg);border:1px solid var(--border-subtle)}.step-preview{text-align:center}.step-icon{font-size:2.5rem;margin-bottom:.5rem}.step-label{font-weight:600;font-size:.85rem;margin-bottom:.25rem}.step-desc{font-size:.75rem;color:var(--text-muted)}.step-arrow{font-size:1.5rem;color:var(--accent-primary)}.requirements{text-align:left;padding:1.5rem;background:var(--bg-glass);border-radius:var(--radius-md);border:1px solid var(--border-subtle);margin-bottom:2rem}.requirements h3{font-size:.9rem;font-weight:600;margin-bottom:1rem;color:var(--text-secondary)}.requirements ul{list-style:none}.requirements li{padding:.5rem 0;font-size:.95rem;display:flex;align-items:center;gap:.75rem}.primary-btn{width:100%;padding:1rem 2rem;font-size:1.1rem;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-normal);box-shadow:var(--shadow-glow)}.primary-btn:hover{transform:translateY(-2px);box-shadow:0 0 50px var(--accent-glow)}.primary-btn:active{transform:translateY(0)}.secondary-btn{padding:.875rem 2rem;font-size:1rem;font-weight:600;color:var(--text-primary);background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-normal)}.secondary-btn:hover{background:#ffffff1a;border-color:var(--accent-primary)}.icon-btn{width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-full);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast)}.icon-btn:hover{background:#ffffff1a}#measure-screen{background:var(--bg-primary)}.measure-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;background:var(--bg-secondary);border-bottom:1px solid var(--border-subtle)}.step-indicator{display:flex;align-items:center;gap:.75rem}.step-badge{width:28px;height:28px;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700;background:var(--accent-primary);border-radius:var(--radius-full)}#step-title{font-weight:600;font-size:1rem}.camera-container{flex:1;position:relative;background:var(--bg-primary);overflow:hidden}#camera-feed{width:100%;height:100%;object-fit:contain;background:#000}#overlay-canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.guide-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:opacity var(--transition-normal)}.guide-overlay.hidden{opacity:0;pointer-events:none}.guide-content{text-align:center;padding:2rem}.guide-icon{font-size:4rem;margin-bottom:1rem;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.1);opacity:.8}}.guide-content p{font-size:1.1rem;color:var(--text-primary);max-width:280px;line-height:1.5}.detection-status{position:absolute;top:1rem;left:1rem;right:1rem;display:flex;gap:.75rem}.status-item{flex:1;display:flex;align-items:center;gap:.5rem;padding:.625rem .875rem;background:#000000b3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:var(--radius-md);font-size:.8rem;border:1px solid var(--border-subtle);transition:border-color var(--transition-fast)}.status-item.detected{border-color:var(--success)}.status-item.detected .status-text{color:var(--success)}.status-icon{font-size:1rem}.status-text{color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.capture-controls{padding:1.5rem;background:var(--bg-secondary);border-top:1px solid var(--border-subtle);text-align:center}.level-guide{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:.5rem;pointer-events:none;z-index:10;transition:opacity .3s ease}.level-guide.hidden{opacity:0}.level-bubble{width:60px;height:60px;border:2px solid rgba(255,255,255,.5);border-radius:50%;position:relative;transition:border-color .3s ease,background-color .3s ease}.level-bubble:after{content:"";position:absolute;top:50%;left:50%;width:20px;height:20px;background:#fffc;border-radius:50%;transform:translate(calc(-50% + var(--bubble-x, 0px)),calc(-50% + var(--bubble-y, 0px)));transition:transform .1s linear,background-color .3s ease}.level-text{font-size:.85rem;font-weight:600;color:#fffc;text-shadow:0 1px 2px rgba(0,0,0,.5);background:#0006;padding:4px 8px;border-radius:4px}.level-guide.perfect .level-bubble{border-color:var(--success);background-color:#10b9811a}.level-guide.perfect .level-bubble:after{background:var(--success)}.level-guide.perfect .level-text{color:var(--success)}.instruction{font-size:.9rem;color:var(--text-secondary);margin-bottom:1rem}.capture-btn{position:relative;width:72px;height:72px;background:transparent;border:none;cursor:pointer;transition:transform var(--transition-fast)}.capture-btn:disabled{opacity:.5;cursor:not-allowed}.capture-btn:not(:disabled):hover{transform:scale(1.05)}.capture-btn:not(:disabled):active{transform:scale(.95)}.capture-ring{position:absolute;inset:0;border:4px solid var(--text-primary);border-radius:50%;transition:border-color var(--transition-fast)}.capture-btn:not(:disabled) .capture-ring{border-color:var(--accent-primary)}.capture-inner{position:absolute;inset:8px;background:var(--text-secondary);border-radius:50%;transition:background var(--transition-fast)}.capture-btn:not(:disabled) .capture-inner{background:var(--accent-primary)}#results-screen{padding:2rem;overflow-y:auto}.results-content{max-width:400px;margin:0 auto;text-align:center;padding-top:2rem}.results-content h1{font-size:1.75rem;font-weight:700;margin-bottom:2rem}.measurement-display{padding:2rem;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));border-radius:var(--radius-lg);margin-bottom:1.5rem;box-shadow:var(--shadow-glow)}.measurement-value{display:flex;align-items:baseline;justify-content:center;gap:.25rem}#circumference-value{font-size:4rem;font-weight:800;line-height:1}.measurement-value .unit{font-size:1.5rem;font-weight:600;opacity:.8}.measurement-label{margin-top:.5rem;font-size:.95rem;opacity:.9}.dimensions-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:2rem}.dimension{padding:1.25rem;background:var(--bg-glass);border-radius:var(--radius-md);border:1px solid var(--border-subtle)}.dim-value{display:block;font-size:1.75rem;font-weight:700;margin-bottom:.25rem}.dim-label{font-size:.8rem;color:var(--text-muted)}.size-recommendation{padding:1.5rem;background:var(--bg-glass);border-radius:var(--radius-md);border:1px solid var(--border-accent);margin-bottom:1.5rem}.size-recommendation h3{font-size:.9rem;font-weight:600;color:var(--text-secondary);margin-bottom:.75rem}.band-size{font-size:2.5rem;font-weight:800;color:var(--accent-secondary)}.band-range{font-size:.85rem;color:var(--text-muted);margin-top:.25rem}.accuracy-note{padding:1rem;background:#f59e0b1a;border-radius:var(--radius-md);border:1px solid rgba(245,158,11,.2);margin-bottom:2rem}.accuracy-note p{font-size:.85rem;color:var(--warning)}.result-actions{display:flex;gap:1rem}.result-actions button{flex:1}@media(max-height:700px){.intro-content{padding-top:1rem}.steps-preview{padding:1rem;margin-bottom:1.5rem}.step-icon{font-size:2rem}}@media(min-width:768px){.camera-container{max-height:70vh}}