@import url("https://fonts.googleapis.com/css?family=Nunito");
*,
*:before,
*:after {
    -webkit-box-sizing: inherit;
    -moz-box-sizing: inherit;
    box-sizing: inherit;
}

html {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-size: 10px;
}

body {
    padding: 0;
    margin: 0;
    font-family: "Nunito", sans-serif;
    background: #fff9e2;
    text-align: center;
}

h1 {
    font-size: 4.5rem;
    line-height: 1;
    margin: 2rem 0 0 0;
    color: #ff7660;
}

h2 {
    font-size: 3rem;
    color: #3b1010;
    margin: 2rem;
}

.score {
    background: #ffe5cf;
    padding: 0 3rem;
    line-height: 1;
    -webkit-border-radius: 1rem;
    -moz-border-radius: 1rem;
    border-radius: 1rem;
    color: #3b1010;
}

.game {
    width: 90vw;
    /* take most of the viewport width */
    max-width: 600px;
    /* don’t exceed original size */
    aspect-ratio: 3 / 2;
    /* keeps 600:400 proportion */
    display: flex;
    flex-wrap: wrap;
    margin: 0 auto;
}

.hole {
    flex: 1 0 33.33%;
    overflow: hidden;
    position: relative;
}

.hole:after {
    display: block;
    background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/1159990/dirt.svg") bottom center no-repeat;
    background-size: contain;
    content: "";
    width: 100%;
    height: 70px;
    position: absolute;
    z-index: 2;
    bottom: -30px;
}

.mole {
    background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/1159990/mole.svg") bottom center no-repeat;
    background-size: 60%;
    position: absolute;
    top: 100%;
    width: 100%;
    height: 100%;
    transition: all 0.4s;
}

.hole.up .mole {
    top: 0;
}

#start {
    font-family: "Nunito", sans-serif;
    display: inline-block;
    text-decoration: none;
    border: 0;
    background: #3b1010;
    color: #fff;
    font-size: 2rem;
    padding: 1rem 2rem;
    cursor: pointer;
    margin: 1rem;
}

#start:hover {
    opacity: 0.8;
}

@media (max-width: 500px) {
    h1 {
        font-size: 3rem;
    }
    h2 {
        font-size: 2rem;
    }
    #start {
        font-size: 1.6rem;
        padding: 0.8rem 1.6rem;
    }
}