@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,500;1,300;1,400&display=swap');

html {
    font-family: Roboto;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    display: inline-block;
}

h1 {
    text-align: center;
    font-size: 4rem;
}

#tiles {
    width: 400px;
    margin: 0 auto;
    position: relative;
    background-color: white;
    padding: 8px;
    border-radius: 0.5rem;
}

.selected {
    background-color: #FFF;
    border: none;
    color: white;
}

.btn {
    font-size: 24px;
    height: 80px;
    width: 25%;
    cursor: pointer;
}