* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

html {
    touch-action: manipulation;
}

body {
    text-align: center;
    height: 100vh;
    background: radial-gradient(black 0%, grey 60%, white 90%);
}

body:before {
    content: '';
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}

#drum-machine {
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    max-width: 300px;
    border-radius: 10px;
    padding-bottom: 10px;
    padding-left: 5px;
    padding-right: 5px;
    -webkit-box-shadow: 2px 2px 5px 2px #000000;
    -moz-box-shadow: 2px 2px 5px 2px #000000;
    box-shadow: 2px 2px 5px 2px #000000;
    display: inline-block;
    vertical-align: middle;
}

h1 {
    padding-top: 10px;
    text-align: center;
}

.pads {
    margin: 20px auto;
    width: 80%;
    display: flex;
    flex-wrap: wrap;
}

button {
    flex: 1;
    width: 50px;
    margin: 10px;
    font-size: 30px;
    padding: 5px 10px;
    border-radius: 5px;
    border: 1px thin black;
    box-shadow: 1px 1px red;
    background: #cccccc;
    outline: none;
    cursor: pointer;
}

.drum-pad:active {
    color: red;
}

.drum-pad.on {
    border: 1px thin black;
    border-top: 2px solid #898989;
    border-left: 2px solid #898989;
    border-right: 2px solid #dddddd;
    border-bottom: 2px solid #dddddd;
    color: red;
}

.sound-text {
    font: 15px bold;
    padding: 10px;
    width: 80%;
    margin: 20px auto;
    background-color: red;
    color: white;
    text-align: center;
    border-radius: 5px;
    border-top: 2px solid black;
    border-bottom: 1px solid #bb7b77;
}

.fa {
    cursor: pointer;
    margin: 0;
    background: none;
}

.fa-play {
    color: #cccccc;
}

.fa-circle {
    color: red;
}

.fa-play.on {
    color: green;
}

.fa-circle.on {
    color: red;
}

.fa.on {
    animation: flash linear .5s infinite;
}

@keyframes flash {
    0% {
        opacity: 1;
    }

    50% {
        opacity: .5;
    }

    100% {
        opacity: 1;
    }
}

#sequencer {
    display: flex;
    justify-content: center;
    align-items: center;
}

.control {
    margin: 0 5px;
    padding: 0;
    background: Transparent;
    border: 0;
    box-shadow: none;
    flex: 0;
    display: inline-block;
}

.status {
    margin: 0 5px;
    background: #CCCCCC;
    color: black;
    border-radius: 5px;
    padding: 5px;
    flex: 1;
}