*{
    box-sizing: border-box;
}
body{
    padding: 0;
    margin: 0;
    position: relative;
    background: linear-gradient(90deg, rgba(192,112,246,1) 0%, rgba(223,178,233,1) 100%);
}
h1{
    text-align: center;
}
section{
    height: auto;
    width: 454px;
    margin: 50px auto 0px;
    display: grid;
    grid-template-columns: repeat(3 , 150px);
    grid-template-rows: repeat(3,130px);
    border: 2px solid #333;
}
section div{
    font-size: 50px;
    text-align: center;
    line-height: 130px;
    border: 1px solid #333;
    cursor: pointer;
}
.popup{
    position:absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    display: flex;
    justify-content: center;
    align-items: center;
    display: none;
}
.popup .text{
    width: 400px;
    height: 200px;
    background: #ddd;
    border-radius: 5px;
    font-size: 30px;
    text-align: center;
    line-height: 200px;
}