*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}.app{display:flex;justify-content:center;align-items:flex-start;min-height:100vh}.container{background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d;padding:40px;max-width:600px;width:100%;margin:20px}.header{text-align:center;margin-bottom:30px}.header h1{font-size:2.5rem;color:#333;margin-bottom:10px}.subtitle{color:#666;font-size:1rem}.stats{display:flex;justify-content:space-around;background:#f8f9fa;border-radius:10px;padding:15px;margin-bottom:20px}.stats span{font-size:.9rem;color:#555;font-weight:500}.input-section{display:flex;gap:10px;margin-bottom:30px}.todo-input{flex:1;padding:12px 16px;border:2px solid #e0e0e0;border-radius:10px;font-size:1rem;transition:border-color .3s}.todo-input:focus{outline:none;border-color:#667eea}.add-btn{padding:12px 24px;background:#667eea;color:#fff;border:none;border-radius:10px;font-size:1rem;cursor:pointer;transition:background .3s;white-space:nowrap}.add-btn:hover{background:#5568d3}.add-btn:active{transform:scale(.98)}.error-message{background:#fee;color:#c33;padding:12px;border-radius:8px;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center}.error-message button{background:#c33;color:#fff;border:none;padding:6px 12px;border-radius:5px;cursor:pointer}.loading{text-align:center;padding:40px;color:#666;font-size:1.1rem}.todo-list{margin-bottom:20px}.todo-section{margin-bottom:30px}.section-title{font-size:1.1rem;color:#555;margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid #f0f0f0}.todo-item{display:flex;align-items:center;gap:12px;padding:15px;background:#f8f9fa;border-radius:10px;margin-bottom:10px;transition:all .3s}.todo-item:hover{background:#e9ecef;transform:translate(5px)}.todo-checkbox{width:20px;height:20px;cursor:pointer;flex-shrink:0}.todo-content{flex:1;font-size:1rem;color:#333;cursor:pointer;word-break:break-word}.todo-item.completed .todo-content{text-decoration:line-through;color:#999}.edit-input{flex:1;padding:8px;border:2px solid #667eea;border-radius:5px;font-size:1rem}.delete-btn{background:none;border:none;font-size:1.2rem;cursor:pointer;opacity:.6;transition:opacity .3s;flex-shrink:0}.delete-btn:hover{opacity:1}.empty-state{text-align:center;padding:60px 20px;color:#999}.empty-state p:first-child{font-size:3rem;margin-bottom:10px}.empty-hint{font-size:.9rem;color:#bbb}.footer{text-align:center;padding-top:20px;border-top:1px solid #e0e0e0;color:#999;font-size:.9rem}@media (max-width: 600px){.container{padding:20px;margin:10px}.header h1{font-size:2rem}.stats{flex-direction:column;gap:10px}.input-section{flex-direction:column}.add-btn{width:100%}}