app.css

* {
    border: none;
    margin: 0;
    padding: 0;
}

body {
    background-color: #2a2a2a;
}

canvas {
    border: 1px solid #585858;
    margin-top: 50px;
}

.content {
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.row {
    align-items: center;
    display: flex;
}

.col {
    align-items: center;
    display: flex;
    flex-direction: column;
}

h1 {
    color: #9c27b0;
    font-family: 'Press Start 2P', cursive;
    margin-top: 50px;
    text-transform: uppercase;
}

svg {
    height: 40px;
    width: 40px;
}

button {
    border-radius: 4px;
    cursor: pointer;
    font-family: 'Press Start 2P', cursive;
    font-size: 12px;
    padding: 10px;
    text-transform: uppercase;
}

button.start {
    background: #6bd82b;
    color: #294e13;
}

button.pause {
    background: yellow;
    color: #848421;
}

.config {
    display: flex;
    flex-direction: column;
    margin-left: 15px;
}

.hide {
    display: none;
}