*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased;background:#f0f2f5;display:flex;justify-content:center;padding:40px 16px}.app{background:white;border-radius:12px;padding:32px;width:100%;max-width:480px;box-shadow:0 2px 12px #0000001a}h1{font-size:1.8rem;margin-bottom:24px;color:#1a1a2e}.todo-form{display:flex;gap:8px;margin-bottom:16px}.todo-form input{flex:1;padding:10px 14px;border:1px solid #ddd;border-radius:8px;font-size:1rem;outline:none}.todo-form input:focus{border-color:#6c63ff}.todo-form button{padding:10px 18px;background:#6c63ff;color:#fff;border:none;border-radius:8px;font-size:1rem;cursor:pointer}.todo-form button:hover{background:#574fd6}.filter{display:flex;gap:8px;margin-bottom:16px}.filter button{padding:6px 14px;border:1px solid #ddd;border-radius:20px;background:white;font-size:.85rem;cursor:pointer;text-transform:capitalize}.filter button.active{background:#6c63ff;color:#fff;border-color:#6c63ff}.todo-list{list-style:none;display:flex;flex-direction:column;gap:8px;margin-bottom:16px}.todo-item{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid #eee;border-radius:8px;background:#fafafa}.todo-item input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:#6c63ff}.todo-item span{flex:1;font-size:1rem;color:#333}.todo-item.completed span{text-decoration:line-through;color:#aaa}.todo-item button{background:none;border:none;color:#bbb;font-size:1rem;cursor:pointer;padding:2px 6px;border-radius:4px}.todo-item button:hover{color:#e74c3c;background:#fdecea}.empty{color:#aaa;text-align:center;padding:24px 0;font-size:.95rem}.count{font-size:.85rem;color:#888;text-align:right}