body {
    background-color: rgb(75, 75, 75);
    margin: 0;
}

.text {
    color: white;
    text-align: center;
}

.line {
    background-color: white;
    height: 5px;
}

#container {
    height: 500px;
    margin: 20px;
}

.box {
    border: 5px solid;
    border-color: white;
    display: inline-block;
    height: 200px;
    margin: 20px 15px 20px 15px;
    width: 200px;
}

.clicked {
    background-color: darkgray;
}