* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Source Sans Pro", Arial, Helvetica, sans-serif;
    font-size: 16px;
}

section div:nth-child(even) {
    background: #fff;
}

h1 {
    color:#153f71;
    font-size: 20px;
    text-align: center;
    padding: 30px 20px;
    background: #fff;
}

ol {
    color: #2b2929;
    display: block;
    
}

ol div {
    background: #d9e7f7;
    padding: 30px;
}

ol li {
    display: block;
    width: 100%;;
    margin: 0 auto;
}

a {
    display: block;
    width: 80%;
    margin: 15px auto 0;
    color: #fff;
    background: #153f71;
    text-decoration: none;
    border-radius: 4px;
    text-align: center;
    padding: 7px 4px;
    box-shadow: 2px 2px 4px grey;
}

footer {
    background:#153f71;
    color: #fff;
    text-align: center;
    padding: 5px 0;
    font-size: 14px;
}

@media screen and (min-width: 768px) {
        body {
            background:#fff;
        }

        section {
            width: 50%;
            margin: 30px auto 120px;
            box-shadow: 5px 5px 15px #22222233;
        }

        h1 {
            font-size:24px;
            padding: 60px 20px;
        }

        footer {
            width: 50%;
            margin: 90px auto 0;
        }

        ol li {
            width: 70%;
            text-align: center;
        }

        a {
            width: 50%;
        }

        a:hover {
            background: #6dcde0;
        }

        ol:nth-child(2) {
            border: 1px solid #153f71;
            
        }
    }