body {
    background-color: #E4E4E4;
    padding: 0;
    height: 100vh;
    width: 100%;
    text-align: center;
    font-family: 'Source Sans Pro', sans-serif;
    font-size: 13px;
    display: flex;
    flex-direction: column;
    justify-items: center;
    align-items: center;
}

.main {
    border-radius: 8px;
    width: 450px;
    height: 300px;
    margin: auto;
    background-color: #fff;
    padding: 30px;
    text-align: center;
}

.main img {
    margin: 40px auto;
    display: block;
}

code {
    margin-top: 40px;
    display: block;
    border: 1px solid #999;
    padding: 5px;
}

code strong {
    font-family: 'Source Sans Pro', sans-serif;
    font-size: 15px;
}