.article-card {
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        padding: 15px;
        margin-bottom: 20px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    }
    .section-title {
        font-size: 26px;
        font-weight: bold;
        color: #228B22;
        margin-top: 20px;
        margin-bottom: 15px;
    }
    .article-type {
        font-size: 14px;
        font-weight: bold;
        color: #777;
        margin-bottom: 5px;
    }
    .article-title {
        font-size: 16px;
        color: #0056b3;
        text-decoration: none;
        font-weight: bold;
    }
    .authors {
        font-size: 14px;
        color: #444;
        margin-top: 5px;
    }
    .doi {
        font-size: 14px;
        margin-top: 5px;
    }
    .doi a {
        color: #1e90ff;
        text-decoration: none;
    }
    .journal-buttons {
        margin-top: 10px;
    }
    .journal-btn {
        display: inline-block;
        padding: 6px 12px;
        border-radius: 4px;
        color: white;
        text-decoration: none;
        font-size: 14px;
        margin-right: 5px;
    }
    .journal-btn-abstract {
        background-color: #003366;
    }
    .journal-btn-html {
        background-color: #d35400;
    }
    .journal-btn-pdf {
        background-color: #c0392b;
    }