body {
    background: beige;
    font-family: sans-serif;
    font-size: 20px;
}
.container {
    width: 400px;
    margin: 50px auto;
}

.container .element {
    width: 100%;
    height: 80px;
    background-color: grey;
    margin-bottom: 20px;
    padding: 10px;
    color: white;
    text-align: center;
}

.container .element.enabled {
    background-color: limegreen;
    color: black;
}