.loading-screen{position:fixed;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;justify-content:center;align-items:center;z-index:9999}.loading-content{text-align:center;color:#fff}.loading-spinner{width:60px;height:60px;border:4px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 20px}@keyframes spin{to{transform:rotate(360deg)}}.loading-content p{font-size:1.2rem;margin:10px 0;font-weight:500}.loading-hint{font-size:.9rem;opacity:.8}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}#app{max-width:1200px;margin:0 auto}.app-container{background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;overflow:hidden}.header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:30px;text-align:center}.header h1{font-size:2rem;font-weight:600}.main-content{padding:30px}.upload-section{margin-bottom:30px}.upload-area{border:3px dashed #667eea;border-radius:12px;padding:60px 20px;text-align:center;cursor:pointer;transition:all .3s ease;background:#f8f9ff}.upload-area:hover{border-color:#764ba2;background:#f0f2ff;transform:translateY(-2px)}.upload-icon{font-size:4rem;margin-bottom:20px}.upload-area p{font-size:1.2rem;color:#333;margin:10px 0}.hint{font-size:.9rem;color:#666}.edit-section{animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.canvas-wrapper{margin-bottom:30px}.canvas-container{width:100%;background:#f5f5f5;padding:20px;border-radius:12px;display:flex;justify-content:center;align-items:center;overflow:hidden;touch-action:none;-webkit-user-select:none;user-select:none}.fabric-canvas{border-radius:8px;box-shadow:0 4px 12px #0000001a;touch-action:none;cursor:grab}.fabric-canvas:active{cursor:grabbing}.gesture-hint{text-align:center;margin-top:10px;padding:10px;background:#f0f2ff;border-radius:8px;font-size:.9rem;color:#667eea}.toolbar{margin-bottom:30px}.tool-group{margin-bottom:25px;padding:20px;background:#f8f9ff;border-radius:12px}.tool-group h3{margin-bottom:15px;color:#667eea;font-size:1.1rem}.button-group{display:flex;flex-wrap:wrap;gap:10px}.btn{padding:10px 20px;border:none;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .3s ease;font-weight:500}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:#e0e0e0;color:#333}.btn-secondary:hover{background:#d0d0d0;transform:translateY(-2px)}.slider-group{display:flex;flex-direction:column;gap:15px}.slider-group label{display:flex;flex-direction:column;gap:8px;color:#333;font-weight:500}.slider-group input[type=range]{width:100%;height:6px;border-radius:3px;background:#ddd;outline:none;-webkit-appearance:none}.slider-group input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:#667eea;cursor:pointer}.slider-group input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#667eea;cursor:pointer;border:none}.action-buttons{display:flex;gap:15px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}.upload-config{padding:20px;background:#f8f9ff;border-radius:12px;margin-bottom:20px}.upload-config label{display:flex;flex-direction:column;gap:10px;color:#333;font-weight:500}.url-input{padding:12px;border:2px solid #ddd;border-radius:8px;font-size:1rem;transition:border-color .3s ease}.url-input:focus{outline:none;border-color:#667eea}.status-message{padding:15px 20px;border-radius:8px;text-align:center;font-weight:500;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.status-message.success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.status-message.error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}@media (max-width: 768px){.header h1{font-size:1.5rem}.main-content{padding:20px}.canvas-container{padding:10px}.fabric-canvas{max-width:100%;height:auto}.button-group{flex-direction:column}.btn{width:100%}.action-buttons{flex-direction:column}.action-buttons .btn{width:100%}.gesture-hint{font-size:.85rem}}.alert-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.alert-box{background-color:#fff;padding:20px;border-radius:8px;text-align:center;max-width:80%}.alert-box p{margin:0 0 15px;font-size:16px}.alert-box .success{color:green}.alert-box .error{color:red}.alert-box button{padding:8px 20px;border:none;border-radius:4px;background-color:#007bff;color:#fff;cursor:pointer}.alert-box button:hover{background-color:#0056b3}