html body {
        background: url("drumkit.jpg") no-repeat center center fixed;
        -webkit-background-size: cover;
        -moz-background-size: cover;
        -o-background-size: cover;
        background-size: cover;
        overflow: hidden;
}

h1 {
        font-family: 'Pacifico', cursive;
        color: #00bfff;
        text-align: center;
        font-size: 3.6rem;
        text-decoration: underline;
        margin-top: 5%;
}

.keys {
        display: flex;
        flex: 1;
        min-height: 80vh;
        align-items: center;
        justify-content: center;
}

.key {
        border: 4px solid white;
        border-radius: 5px;
        margin: 1rem;
        font-size: 1.5rem;
        padding: 1rem .5rem;
        transition:all 0.08s;
        width: 100px;
        text-align: center;
        color: white;
        background: rgba(0,0,0,0.4);
        text-shadow: 0 0 5px black;
}

.playing {
        transform: scale(1.2);
        border-color: purple;
        box-shadow: 0 0 10px purple;
}

kbd {
        display: block;
        font-size: 40px;
}

.sound {
        font-size: 1.2rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        color: #ffc600;
}