1  body {
 2    cursor: crosshair;
 3  }
 4  
 5  .wrapper {
 6    position: relative;
 7    width: 100dvw;
 8    height: 100dvh;
 9  }
10  
11  .box {
12    width: 50px;
13    height: 50px;
14    position: absolute;
15    background: var(--yellow);
16    transition: background 0.1s ease;
17  }