html, body{
    margin: 0 auto;
    padding: 0;
    background: #1d1d1d;

    font-family: Arial, Helvetica, sans-serif;
    color: #eee;
}

header{
    text-transform: uppercase;
    box-sizing: border-box;
    padding: 1vh;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
    font-size: 4vh;
    color: #111;
}

.game{
    width: 100%;
    height: 53vh;
}

.controls{
    padding: 3vw 5vw 0vw 5vw;
    display: flex;
    flex-flow: row wrap;
    align-content: space-between;
    justify-content: space-between;
}
.key-block{
    padding: .5vh;
    box-sizing: border-box;
    display: inline-block;
    width: 40vh;
    text-align: left;
}
.key-block>.key{
    width: 5vh;
    height: 5vh;
    font-size: 3vh;
    line-height: 5vh;
    text-align: center;
    font-weight: bold;
    border-radius: .3vw;
    border: 1px solid #555;
    color: #555;
    display: inline-block;
}
.key-block>.description{
    display: inline-block;
    color: #444;
}