body {
    background-color: #f5f5f5;
}

#main-content {
    /*max-width: 940px;*/
    padding: 1em 1em;
    margin: 0 auto 20px;
    background-color: #fff;
    border: 1px solid #e5e5e5;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    border-radius: 5px;
    font-size:30px;
    font-weight: bold;
}

.center {
    /*text-align: center;*/
    display: flex;
    justify-content: center;
}

.blue {
    color: blue;
}

.red {
    color: red;
}

.green {
    color: green;
}