2048.css

    header {
        display: block;
        margin: 0 auto;
        width: 100%;
        text-align: center;
    }
    
    header h1 {
        font-family: Arial;
        font-size: 40px;
        font-weight: bold;
    }
    
    header #newgamebutton {
        display: block;
        margin: 20px auto;
        width: 100px;
        padding: 10px 10px;
        background-color: #8f7a66;
        font-family: Arial;
        color: white;
        border-radius: 10px;
        text-decoration: none;
    }
    
    header #newgamebutton:hover {
        background-color: #9f8b77;
    }
    
    header p {
        font-family: Arial, Helvetica, sans-serif;
        font-size: 25px;
        margin: 20px auto;
    }
    
    #grid-container {
        width: 460px;
        height: 460px;
        padding: 20px;
        margin: 50px auto;
        background-color: #bbada0;
        border-radius: 10px;
        position: relative;
    }
    
    .grid-cell {
        width: 100px;
        height: 100px;
        border-radius: 6px;
        background-color: #ccc0b3;
        position: absolute;
    }
    
    .number-cell {
        border-radius: 6px;
        font-family: Arial, Helvetica, sans-serif;
        font-weight: bold;
        font-size: 60px;
        line-height: 100px;
        text-align: center;
        position: absolute;
    }