:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-tertiary: #1a1a25;--bg-card: rgba(26, 26, 37, .8);--text-primary: #ffffff;--text-secondary: #a0a0b0;--text-muted: #606070;--accent-primary: #6366f1;--accent-secondary: #818cf8;--accent-glow: rgba(99, 102, 241, .4);--success: #10b981;--success-glow: rgba(16, 185, 129, .4);--border-color: rgba(255, 255, 255, .08);--border-hover: rgba(255, 255, 255, .15);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 25px rgba(0, 0, 0, .5);--shadow-glow: 0 0 30px var(--accent-glow)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.5}#app{display:flex;flex-direction:column;min-height:100vh}.header{position:sticky;top:0;z-index:100;background:#0a0a0fcc;backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color)}.header-content{max-width:1200px;margin:0 auto;padding:var(--spacing-md) var(--spacing-lg);display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:var(--spacing-sm)}.logo-icon{width:32px;height:32px;color:var(--accent-primary)}.logo-text{font-size:1.25rem;font-weight:700;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.privacy-badge{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-xs) var(--spacing-md);background:#10b9811a;border:1px solid rgba(16,185,129,.3);border-radius:var(--radius-xl);font-size:.875rem;color:var(--success)}.privacy-icon{width:16px;height:16px}.main{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-xl)}.upload-section{width:100%;max-width:600px}.upload-area{position:relative;border:2px dashed var(--border-color);border-radius:var(--radius-2xl);padding:var(--spacing-2xl);text-align:center;cursor:pointer;transition:all var(--transition-base);background:linear-gradient(135deg,var(--bg-secondary),var(--bg-tertiary))}.upload-area:hover,.upload-area.drag-over{border-color:var(--accent-primary);background:linear-gradient(135deg,#6366f10d,#818cf80d);transform:translateY(-2px);box-shadow:var(--shadow-glow)}.upload-content{pointer-events:none}.upload-icon{width:64px;height:64px;color:var(--accent-primary);margin-bottom:var(--spacing-lg);opacity:.8}.upload-title{font-size:1.5rem;font-weight:600;margin-bottom:var(--spacing-sm)}.upload-subtitle{color:var(--text-secondary);margin-bottom:var(--spacing-md)}.upload-hint{font-size:.875rem;color:var(--text-muted)}.processing-section{width:100%;max-width:1000px;display:flex;flex-direction:column;gap:var(--spacing-xl)}.hidden{display:none!important}.preview-container{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-md);backdrop-filter:blur(12px)}.preview-wrapper{position:relative;width:100%;aspect-ratio:16 / 10;border-radius:var(--radius-lg);overflow:hidden;background:var(--bg-tertiary)}.preview-canvas{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:contain}#enhanced-canvas{clip-path:inset(0 50% 0 0)}#enhanced-canvas.show-transparency{background-image:linear-gradient(45deg,#404040 25%,transparent 25%),linear-gradient(-45deg,#404040 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#404040 75%),linear-gradient(-45deg,transparent 75%,#404040 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0px;background-color:#2a2a2a}.comparison-slider{position:absolute;top:0;left:50%;height:100%;width:4px;transform:translate(-50%);cursor:ew-resize;z-index:10}.slider-line{position:absolute;top:0;left:50%;width:2px;height:100%;background:#fff;transform:translate(-50%);box-shadow:0 0 10px #00000080}.slider-handle{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:40px;height:40px;background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg)}.slider-handle svg{width:20px;height:20px;color:var(--bg-primary)}.preview-labels{position:absolute;bottom:var(--spacing-md);left:var(--spacing-md);right:var(--spacing-md);display:flex;justify-content:space-between;pointer-events:none}.preview-labels span{padding:var(--spacing-xs) var(--spacing-sm);background:#000000b3;border-radius:var(--radius-sm);font-size:.75rem;font-weight:500;text-transform:uppercase;letter-spacing:.05em}.controls-panel{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-lg);backdrop-filter:blur(12px);display:flex;flex-wrap:wrap;gap:var(--spacing-lg);align-items:center;justify-content:space-between}.control-group{display:flex;flex-direction:column;gap:var(--spacing-sm)}.control-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary)}.scale-buttons{display:flex;gap:var(--spacing-xs)}.scale-btn{padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-secondary);font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.scale-btn:hover{border-color:var(--border-hover);color:var(--text-primary)}.scale-btn.active{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.backend-status{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-tertiary);border-radius:var(--radius-md)}.backend-indicator{width:8px;height:8px;border-radius:50%;background:var(--text-muted)}.backend-indicator.webgpu{background:var(--success);box-shadow:0 0 8px var(--success-glow)}.backend-indicator.wasm{background:#f59e0b}.backend-name{font-size:.875rem;font-weight:500}.model-selector-group{flex:1;min-width:200px}.model-selector{width:100%;padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast);appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}.model-selector:hover{border-color:var(--border-hover)}.model-selector:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 2px var(--accent-glow)}.model-selector option{background:var(--bg-secondary);color:var(--text-primary);padding:var(--spacing-sm)}.model-info{display:flex;gap:var(--spacing-xs);margin-top:var(--spacing-xs)}.model-badge{padding:2px 8px;border-radius:var(--radius-sm);font-size:.625rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.model-badge.speed-fast{background:#10b98133;color:#10b981}.model-badge.speed-medium{background:#f59e0b33;color:#f59e0b}.model-badge.speed-slow{background:#ef444433;color:#ef4444}.model-badge.quality-good{background:#9ca3af33;color:#9ca3af}.model-badge.quality-great{background:#6366f133;color:#818cf8}.model-badge.quality-excellent{background:#a855f733;color:#a855f7}.model-selector-row{display:flex;gap:var(--spacing-sm);align-items:center}.model-selector-row .model-selector{flex:1}.btn-load,.btn-unload{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:.75rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.btn-load svg,.btn-unload svg{width:14px;height:14px}.btn-load{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff}.btn-load:hover{transform:translateY(-1px);box-shadow:0 0 15px var(--accent-glow)}.btn-load:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-unload{background:var(--bg-tertiary);color:var(--text-secondary)}.btn-unload:hover{background:#ef444433;border-color:#ef444480;color:#ef4444}.model-download-progress{display:flex;align-items:center;gap:var(--spacing-sm);margin-top:var(--spacing-sm)}.download-progress-bar{flex:1;height:6px;background:var(--bg-tertiary);border-radius:var(--radius-sm);overflow:hidden}.download-progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-primary),var(--accent-secondary));width:0%;transition:width .15s ease}.download-progress-text{font-size:.75rem;font-weight:600;color:var(--text-secondary);min-width:80px;text-align:right}.model-cache-status{font-size:.625rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;padding:2px 8px;border-radius:var(--radius-sm)}.model-cache-status.cached{background:#10b98133;color:#10b981}.model-cache-status.not-cached{background:#9ca3af33;color:#9ca3af}.action-buttons{display:flex;gap:var(--spacing-sm)}.btn{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-lg);border:none;border-radius:var(--radius-md);font-weight:600;font-size:.875rem;cursor:pointer;transition:all var(--transition-fast)}.btn svg{width:18px;height:18px}.btn-secondary{background:var(--bg-tertiary);color:var(--text-secondary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-secondary);color:var(--text-primary);border-color:var(--border-hover)}.btn-primary{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;box-shadow:var(--shadow-md),0 0 20px var(--accent-glow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg),0 0 30px var(--accent-glow)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-success{background:linear-gradient(135deg,var(--success),#059669);color:#fff;box-shadow:var(--shadow-md),0 0 20px var(--success-glow)}.btn-success:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg),0 0 30px var(--success-glow)}.progress-overlay{position:fixed;inset:0;background:#0a0a0fe6;backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000}.progress-content{text-align:center;max-width:300px}.progress-spinner{width:60px;height:60px;border:3px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;margin:0 auto var(--spacing-lg);animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.progress-text{font-size:1.125rem;margin-bottom:var(--spacing-md)}.progress-bar{height:4px;background:var(--bg-tertiary);border-radius:var(--radius-sm);overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-primary),var(--accent-secondary));width:0%;transition:width var(--transition-base)}.footer{text-align:center;padding:var(--spacing-lg);border-top:1px solid var(--border-color);font-size:.875rem;color:var(--text-muted)}.footer-privacy{margin-top:var(--spacing-xs);color:var(--success)}@keyframes pulse-glow{0%,to{box-shadow:0 0 20px var(--accent-glow)}50%{box-shadow:0 0 40px var(--accent-glow)}}.processing .btn-primary{animation:pulse-glow 2s ease-in-out infinite}@media (max-width: 768px){.header-content{flex-direction:column;gap:var(--spacing-md)}.controls-panel{flex-direction:column;align-items:stretch}.action-buttons{flex-direction:column}.btn{justify-content:center}}