styles.css

.container {
    width: 500px;
    height: 700px;
    background-color: aqua;
    /* the container is relative to the browser */
    position: relative;
    font-size: 50px;
    text-align: center;
}

.player {
    width: 50px;
    height: 75px;
    background-color: green;
    position: absolute;
}

.nft {
    width: 50px;
    height: 50px;
    display: inline-block;
    content:url("nft.png");
    position: absolute;
    z-index: 2;
}

.ground {
    width: 75px;
    height: 15px;
    background-color: hotpink;
    /* position of ground is abosulute to the platform */
    position: absolute;
    z-index: 1;
}

.grid-container {
    display: grid;
    grid-template-columns: auto auto auto;
    /* background-color: #2196F3; */
    padding: 10px;
  }
  .grid-item {
    width: 100px;
    height: 100px;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.8);
    content:url("nft.png");
  }


.hide {
    visibility: hidden;
}