.preview * {
    margin: 2px;
    padding: 2px;
    box-sizing: content-box;

}

.preview h1 {
    font-size: 28px;
    margin: 4px;
}

.preview blockquote { 
    display: block;
    margin-top: 1em;
    margin-bottom: 1em;
    margin-left: 20px;
    margin-right: 20px;
    background-color: #f0f0f0;
    text-align: center;
    padding: 4px;
}

.preview code {
    font-family: Consolas,"courier new";
    color: crimson;
    padding: 4px;
}

.preview pre {
    margin: 4px;
    padding: 2px;
    background-color: #f0f0f0;
}