:root{--font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;--bg-primary: #0f1115;--bg-secondary: #1a1d24;--bg-tertiary: rgba(255, 255, 255, .05);--text-primary: #f8f9fa;--text-secondary: #adb5bd;--text-accent: #20bf6b;--accent-color: #20bf6b;--accent-hover: #26de81;--accent-glow: rgba(32, 191, 107, .4);--border-color: rgba(255, 255, 255, .1);--border-focus: rgba(32, 191, 107, .5);--shadow-sm: 0 4px 6px rgba(0, 0, 0, .1);--shadow-md: 0 10px 20px rgba(0, 0, 0, .2);--shadow-lg: 0 20px 40px rgba(0, 0, 0, .4);--shadow-glow: 0 0 20px var(--accent-glow);--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .3s ease;--transition-slow: .5s ease}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);background-image:radial-gradient(circle at 15% 50%,rgba(32,191,107,.08),transparent 25%),radial-gradient(circle at 85% 30%,rgba(0,210,211,.05),transparent 25%);color:var(--text-primary);min-height:100vh;line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin-bottom:.5em;letter-spacing:-.02em}a{color:var(--accent-color);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-hover)}button{font-family:inherit;cursor:pointer;border:none;background:none}.glass-panel{background:#1a1d2499;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-md)}.app-container{display:flex;flex-direction:column;min-height:100vh;max-width:1200px;margin:0 auto;padding:2rem}.header{text-align:center;margin-bottom:3rem;animation:fadeInDown .8s ease-out forwards}.header-title{font-size:3rem;background:linear-gradient(135deg,#fff,#a8ebb4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem}.header-subtitle{color:var(--text-secondary);font-size:1.1rem;max-width:600px;margin:0 auto}.main-content{flex:1;display:flex;flex-direction:column;align-items:center;gap:2rem;width:100%;animation:fadeIn 1s ease-out .3s both}.footer{margin-top:4rem;text-align:center;color:var(--text-secondary);font-size:.9rem;padding:2rem 0;border-top:1px solid var(--border-color)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;border-radius:var(--radius-full);transition:all var(--transition-normal)}.btn-primary{background:linear-gradient(135deg,var(--accent-color) 0%,#108544 100%);color:#fff;box-shadow:0 4px 15px #20bf6b4d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px #20bf6b80}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:#ffffff1a;border-color:#fff3}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.flex-center{display:flex;align-items:center;justify-content:center;gap:.5rem}.spinner{width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}.upload-zone{width:100%;max-width:600px;margin:0 auto;border:2px dashed var(--border-color);border-radius:var(--radius-md);padding:4rem 2rem;background:#ffffff05;transition:all var(--transition-normal);display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;overflow:hidden}.upload-zone:before{content:"";position:absolute;inset:0;background:var(--accent-glow);opacity:0;transition:opacity var(--transition-normal);z-index:0}.upload-zone.dragging{border-color:var(--accent-color);transform:scale(1.02)}.upload-zone.dragging:before{opacity:.1}.upload-content{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;text-align:center}.upload-icon-wrapper{width:80px;height:80px;border-radius:50%;background:#20bf6b1a;display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem;color:var(--accent-color);transition:transform var(--transition-normal)}.upload-zone:hover .upload-icon-wrapper{transform:translateY(-5px);background:#20bf6b33}.upload-icon{width:36px;height:36px}.upload-content h3{font-size:1.5rem;margin-bottom:.5rem;color:var(--text-primary)}.upload-content p{color:var(--text-secondary);margin-bottom:2rem}.file-input-hidden{display:none}.upload-btn{cursor:pointer;margin:0}.canvas-wrapper{display:flex;flex-direction:column;align-items:center;gap:1rem;width:100%}.canvas-container{position:relative;background:var(--bg-secondary);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border-color);touch-action:none}.layer-canvas{position:absolute;top:0;left:0}.base-canvas{z-index:1}.draw-canvas{z-index:2;cursor:crosshair}.loading-skeleton{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);color:var(--text-secondary);animation:pulse 1.5s infinite;z-index:3}.mask-controls{display:flex;justify-content:flex-end;width:100%;max-width:800px}@keyframes pulse{0%{opacity:.6}50%{opacity:1}to{opacity:.6}}.result-viewer{width:100%;padding:3rem 2rem;text-align:center;animation:fadeIn .6s ease-out}.result-subtitle{color:var(--text-secondary);margin-bottom:2rem}.comparison-container{position:relative;max-width:800px;margin:0 auto;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--border-color);background:var(--bg-secondary)}.result-image{width:100%;height:auto;display:block}.comparison-controls{position:absolute;bottom:20px;left:50%;transform:translate(-50%);z-index:10}.toggle-btn{background:#0f1115b3;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);padding:.5rem 1.5rem;border-radius:var(--radius-full);color:#fff;font-weight:500;border:1px solid rgba(255,255,255,.2);-webkit-user-select:none;user-select:none;touch-action:none;transition:all var(--transition-fast)}.toggle-btn:active{background:#20bf6bcc}.action-buttons{margin-top:2.5rem;display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}