.article-container {
    background-color: #fff;
    margin-top: 80px; 
    margin-bottom: 80px;
    margin-left: auto;
    margin-right: auto;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(18,18,18,.1);
    max-width: 890px;
}
.article-header {
    margin-bottom: 20px;
}
.article-title {
    font-size: 2.1em;
    font-weight: bold;
    color: #0378bb;
    border-left: 12px solid #3d97cb;
    border-bottom: 1px solid #5ea2d6;
    padding-left: 5px;
}
.article-meta {
    text-align: right;
    color: darkgray;
}
.article-meta .vertical-bar {
    margin: 0 8px;
}
.article-content{
    padding: 0 1em;
}
.article-content h1{
    color: #0378bb;
    font-size: 2.1em;
    margin-bottom: 0.75em;
}
.article-content h2{
    color: #0378bb;
    font-size: 1.8em;
    margin-bottom: 0.75em;
}
.article-content h3{
    color: #0378bb;
    font-size: 1.5em;
    margin-bottom: 0.75em;
}
.article-content h4{
    color: #0378bb;
    font-size: 1.2em;
    margin-bottom: 0.75em;
}
.article-content img {
    max-width: 100%;
}
.article-content blockquote {
    margin: 1.4em 0;
    padding-left: 1em;
    color: #646464;
    border-left: 3px solid #D3D3D3;
}
.article-copyright {
    color: rgb(144, 147, 153);
    padding-top: 1em;
    padding-left: 1em;
    padding-right: 1em;
    border-top: 1px solid rgb(235, 238, 245);
}
.article-copyright .content {
    padding: 10px;
    background-color: #f2f6fc;
    border-radius: 4px;
    border-left: 4px solid #47CDFF;
}
.article-copyright a {
    color: rgb(144, 147, 153);
}
.article-copyright a:hover {
    color: #175199;
    text-decoration: none;
}
.tool-container {
    background-color: #fff;
    margin-top: 80px; 
    margin-bottom: 60px;
    margin-left: auto;
    margin-right: auto;
    padding: 15px;
    box-shadow: 0 1px 3px rgba(18,18,18,.1);
    width: 1260px;
}
.tool-header{
    margin: 5px auto 20px;
}
.table-wrapper-scroll {
    overflow: auto;
}
.muted-anchor {
    color: #8590a6;
    text-decoration: none;
}
.muted-anchor:hover {
    color: #175199;
    text-decoration: none;
}
.navbar-light .navbar-nav .active>.nav-link {
    color: #555;
    background-color: #e7e7e7;
}
footer a:hover {
    text-decoration: none;
}
body {
    background: #f5f5f5;
}
#drag-and-drop-container {
    background: #fff;
    box-shadow: 0px 4px 10px 4px rgba(0,0,0,.1);
    border-radius: 12px;
    height: 150px;
    margin-top: 12px;
    margin-bottom: 16px;
    padding: 24px;
}
#drag-and-drop-area {
    line-height: 60px;
    color: #9195A3;
    margin-bottom: 12px;
    margin-left: 12px;
    margin-right: 12px;
    width: 100%;
    border: 1px dashed #A3A3A3;
}