body {
    text-align: center;
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}

#game-container {
    position: relative;
    width: 300px;
    height: 300px;
    border: 2px solid black;
    margin: auto;
    background-color: white;
    overflow: hidden;
}

#box {
    width: 50px;
    height: 50px;
    background-color: red;
    position: absolute;
    cursor: pointer;
}