body {
        font-family:  Helvetica, sans-serif,Arial;
        font-size: 12px;
        margin-top: 0
    }

    #header {
        height: 3rem;
        background: lightgray;
        text-align: center;
        line-height: 3rem;
        width: 100%;
        color: black;
        font-size: 20px;
        font-weight: bold
    }

    #logo {
        position: absolute;
        right: 0;
        top: 0;
        height: 3rem;
        width: 5rem
    }

    img {
        border: 0;
        width: 100%
    }

    .btn {
        margin: 0 auto;
        width: 85%;
        height: 4rem;
        background-color: #59b559;
        color: white;
        text-align: center;
        line-height: 4rem
    }

    .btn a {
        color: white;
        font-size: 23px;
        text-decoration: none
    }

    #rules {
        color: black;
        line-height: 20px;
        padding:10px;
        font-size: 17px;
        text-align: center
    }

    ul {
        list-style-type: none
    }

    .headline {
        text-align: center;
        font-size: 27px;
        color:red;
        font-weight:bold;
        padding: 10px 0px;
    }