:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh;background:#f0f2f5;color:#333}#root{width:100%}*{box-sizing:border-box;margin:0;padding:0}.app{max-width:1000px;margin:0 auto;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}.app-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:30px;border-radius:12px;margin-bottom:30px;box-shadow:0 4px 6px #0000001a}.cart-title{margin-bottom:20px;font-size:2em;cursor:pointer;transition:opacity .2s}.cart-title:hover{opacity:.9}.title-input{width:100%;padding:10px 15px;font-size:2em;font-weight:700;border:2px solid white;border-radius:6px;background:#fffffff2;margin-bottom:20px}.share-section{display:flex;gap:10px;margin-top:15px}.share-link{flex:1;padding:10px 15px;border:none;border-radius:6px;font-size:14px;background:#ffffffe6}.copy-btn{padding:10px 20px;background:#4caf50;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:700;transition:background .3s}.copy-btn:hover{background:#45a049}.app-main{background:#fff;padding:30px;border-radius:12px;box-shadow:0 2px 8px #0000001a}.add-item-form{display:grid;grid-template-columns:2fr 1fr 100px 120px auto;gap:10px;margin-bottom:30px}.item-input{padding:12px 15px;border:2px solid #e0e0e0;border-radius:6px;font-size:16px;transition:border-color .3s}.item-input:focus{outline:none;border-color:#667eea}.category-select{padding:12px 15px;border:2px solid #e0e0e0;border-radius:6px;font-size:16px;background:#fff;cursor:pointer;transition:border-color .3s}.category-select:focus{outline:none;border-color:#667eea}.quantity-input{padding:12px 15px;border:2px solid #e0e0e0;border-radius:6px;font-size:16px;text-align:center}.quantity-input:focus{outline:none;border-color:#667eea}.price-input{padding:12px 15px;border:2px solid #e0e0e0;border-radius:6px;font-size:16px;text-align:right}.price-input:focus{outline:none;border-color:#667eea}.add-btn{padding:12px 30px;background:#667eea;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:700;font-size:16px;transition:background .3s}.add-btn:hover{background:#5568d3}.total-section{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px;border-radius:8px;margin-bottom:30px;text-align:center}.total-section h2{font-size:1.8em;margin:0}.items-container{display:flex;flex-direction:column;gap:30px}.category-group{border:2px solid #e0e0e0;border-radius:8px;padding:20px;background:#f8f9fa}.category-title{margin-bottom:15px;color:#667eea;font-size:1.3em;padding-bottom:10px;border-bottom:2px solid #667eea}.items-list{display:flex;flex-direction:column;gap:15px}.empty-message{text-align:center;color:#999;padding:40px;font-size:18px}.item{background:#fff;border-radius:8px;padding:15px;transition:all .3s;border:2px solid #e0e0e0}.item:hover{border-color:#667eea;box-shadow:0 2px 8px #667eea33}.item.checked{opacity:.6}.item.checked .item-name{text-decoration:line-through;color:#999}.item-main{display:flex;align-items:center;gap:15px}.item-checkbox{width:20px;height:20px;cursor:pointer;flex-shrink:0}.item-name{flex:1;font-size:16px;font-weight:500;cursor:pointer;-webkit-user-select:none;user-select:none;min-width:0}.item-edit-input{flex:1;padding:8px;border:2px solid #667eea;border-radius:4px;font-size:16px}.item-info{display:flex;align-items:center;gap:10px}.item-price{font-weight:700;color:#667eea;font-size:1.1em;min-width:100px;text-align:right}.item-controls{display:flex;align-items:center;gap:8px;flex-shrink:0}.quantity-btn{width:32px;height:32px;border:none;background:#667eea;color:#fff;border-radius:4px;cursor:pointer;font-size:18px;font-weight:700;transition:background .3s}.quantity-btn:hover{background:#5568d3}.item-quantity{min-width:30px;text-align:center;font-weight:700;font-size:16px}.expand-btn{padding:6px 12px;background:#9f7aea;color:#fff;border:none;border-radius:4px;cursor:pointer;font-weight:700;transition:background .3s}.expand-btn:hover{background:#805ad5}.delete-btn{padding:8px 15px;background:#f44336;color:#fff;border:none;border-radius:4px;cursor:pointer;font-weight:700;transition:background .3s}.delete-btn:hover{background:#da190b}.item-details{margin-top:15px;padding-top:15px;border-top:2px solid #e0e0e0;display:flex;flex-direction:column;gap:12px}.detail-row{display:grid;grid-template-columns:120px 1fr;gap:10px;align-items:start}.detail-row label{font-weight:700;color:#555;padding-top:10px}.detail-input{padding:10px;border:2px solid #e0e0e0;border-radius:4px;font-size:15px;transition:border-color .3s}.detail-input:focus{outline:none;border-color:#667eea}.detail-select{padding:10px;border:2px solid #e0e0e0;border-radius:4px;font-size:15px;background:#fff;cursor:pointer;transition:border-color .3s}.detail-select:focus{outline:none;border-color:#667eea}.detail-textarea{padding:10px;border:2px solid #e0e0e0;border-radius:4px;font-size:15px;font-family:inherit;resize:vertical;transition:border-color .3s}.detail-textarea:focus{outline:none;border-color:#667eea}@media(max-width:768px){.app{padding:10px}.add-item-form{grid-template-columns:1fr}.item-main{flex-wrap:wrap}.item-controls{width:100%;justify-content:flex-end;margin-top:10px}.detail-row{grid-template-columns:1fr}.detail-row label{padding-top:0}}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:20px}.loading-spinner{width:50px;height:50px;border:5px solid #f3f3f3;border-top:5px solid #667eea;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-container p{font-size:18px;color:#667eea;font-weight:700}