.article_card {
    /*box-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);*/
    box-shadow: 0 3px 4px rgba(0,0,0,0.16), 0 3px 4px rgba(0,0,0,0.23);
    background-color: #ffffff;
    margin: 1em 0;
}

.article_card h2 {
    margin: 0;
    padding: 0 0.5em 0 0.5em;
    line-height: 1.3;
}

.article_card h2 a {
    color: #444;
    text-decoration: none;
    transition: all 0.3s ease;
}

.article_card h2 a:hover {
    color: #42A5F5;
}

.article_card p {
    padding: 1em;
    margin: 0;
}

#article_content {
    background-color: #ffffff;
}

#article_content {
}

#article_content h1:first-child {
    margin: 0;
    padding: 0.5em 1em;
    border-bottom: 1px solid #E0E0E0;
}

#article_body {
    padding: 1em;
}

#article_content .article_info {
    margin: 0.25em 1em;
}

#article_body pre {
    background-color: #eff0f1;
    padding: 5px;
}

.article_comment {
    box-shadow: 0 3px 4px rgba(0,0,0,0.16), 0 3px 4px rgba(0,0,0,0.23);
    background-color: #ffffff;
    margin: 1em 0;
    padding: 0.5em;
}

.article_comment_info {
    border-bottom: 1px solid #E0E0E0;
}

.article_comment .comment_author {
    font-weight: bold;
}

.article_comment_form input label {

}

.article_comment_form input {
    display-inside: block;
}

.article_comment_form input[type="text"] + label {
    display: block;
    position: relative;
    bottom: 2em;
    visibility: hidden;
    transition: 0.3s;
    color: #9b9b9b;
    line-height: 1em;
    height: 1em;
}

.article_comment_form input[type="text"]:focus + label {
    visibility: visible;
    bottom: 4em;
    font-size: 80%;
    transition: 0.3s;
}

.article_comment_form input[type="text"] {
    outline: none;
    border: none;
    border-bottom: 1px solid #9b9b9b;
    background-color: transparent;
    margin-bottom: 1em;
}

.article_comment_form input:focus {
    outline: none;
}

.article_comment_form input::-webkit-input-placeholder {
    font-size: 16px;
    color: #9b9b9b;
    opacity: 1;
    transition: all 0.3s;
}

.article_comment_form input:focus::-webkit-input-placeholder {
    opacity: 0;
}