/**
 * Article Details Page Enhanced Styling
 * Clean academic journal look with modern card-style layout
 * CSS-only styling - no structural changes
 */

/* ============================================================================
   MAIN ARTICLE CONTAINER
   ============================================================================ */

/* Article wrapper - main container for entire article view */
.article-details {
    background: transparent;
    padding: 40px 0;
    margin-bottom: 40px;
}

/* ============================================================================
   ARTICLE HEADER & TITLE
   ============================================================================ */

/* Article title - primary heading */
.article-details header .page-header {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.4;
    color: #2c3e50;
    margin-top: 0;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e8ecef;
}

/* Subtitle styling */
.article-details header .page-header small {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: #7f8c8d;
    margin-top: 12px;
    line-height: 1.5;
}

/* ============================================================================
   ARTICLE SIDEBAR (Metadata, Cover Image, Downloads)
   ============================================================================ */

/* Sidebar container - contains article meta information */
.article-details .article-sidebar {
    padding-right: 30px;
}

/* Cover image wrapper */
.article-details .cover-image {
    margin-bottom: 24px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.article-details .cover-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Metadata list group - contains Published date, DOI, Issue, Section, etc. */
.article-details .list-group {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    margin-bottom: 24px;
}

/* Individual metadata items */
.article-details .list-group-item {
    padding: 16px 20px;
    border-left: none;
    border-right: none;
    background: #f8f9fa;
    border-color: #e9ecef;
    font-size: 0.9rem;
    line-height: 1.6;
}

.article-details .list-group-item:first-child {
    border-top: none;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.article-details .list-group-item:last-child {
    border-bottom: none;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
}

/* Strong labels in metadata */
.article-details .list-group-item strong {
    color: #34495e;
    font-weight: 600;
    display: block;
    margin-bottom: 4px;
}

/* Links in metadata (DOI, etc.) */
.article-details .list-group-item a {
    color: #3498db;
    text-decoration: none;
    word-break: break-all;
}

.article-details .list-group-item a:hover {
    color: #2980b9;
    text-decoration: underline;
}

/* Keywords styling */
.article-details .list-group-item.keywords .value {
    color: #555;
}

/* ============================================================================
   DOWNLOAD/ACTION BUTTONS SECTION
   ============================================================================ */

/* Download section wrapper */
.article-details .download {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.article-details .download h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-top: 0;
    margin-bottom: 16px;
}

/* Download buttons */
.article-details .download .btn {
    margin-bottom: 8px;
    margin-right: 8px;
    padding: 10px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.article-details .download .btn-primary {
    background: #3498db;
    border-color: #3498db;
}

.article-details .download .btn-primary:hover {
    background: #2980b9;
    border-color: #2980b9;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
}

/* ============================================================================
   MAIN CONTENT AREA (Abstract, Authors, References)
   ============================================================================ */

/* Main content column */
.article-details .article-main {
    padding-left: 30px;
}

/* Section headings within article content */
.article-details .article-main h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2c3e50;
    margin-top: 32px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e8ecef;
}

.article-details .article-main h2:first-child {
    margin-top: 0;
}

/* Subsection headings */
.article-details .article-main h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #34495e;
    margin-top: 24px;
    margin-bottom: 12px;
}

/* Abstract section */
.article-details .article-main .abstract {
    background: #f8f9fa;
    padding: 24px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    margin-bottom: 32px;
    line-height: 1.8;
}

.article-details .article-main .abstract h3 {
    margin-top: 0;
    color: #2c3e50;
}

.article-details .article-main .abstract p {
    color: #555;
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 0;
}

/* Author information */
.article-details .article-main .authors {
    margin-bottom: 24px;
}

.article-details .article-main .authors .author {
    margin-bottom: 12px;
    padding: 12px 16px;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #28a745;
}

.article-details .article-main .authors .author .name {
    font-weight: 600;
    color: #2c3e50;
    font-size: 1rem;
}

.article-details .article-main .authors .author .affiliation {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-top: 4px;
}

/* General paragraphs in article content */
.article-details .article-main p {
    font-size: 1rem;
    line-height: 1.8;
    color: #444;
    margin-bottom: 16px;
}

/* ============================================================================
   REFERENCES & CITATIONS SECTION
   ============================================================================ */

/* References list */
.article-details .references {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 2px solid #e8ecef;
}

.article-details .references h2 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
}

.article-details .references ol,
.article-details .references ul {
    padding-left: 24px;
}

.article-details .references li {
    margin-bottom: 12px;
    line-height: 1.7;
    color: #555;
}

/* Citation tools section */
.article-details .citation_display {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-top: 24px;
    border-left: 4px solid #6c757d;
}

.article-details .citation_display h3 {
    margin-top: 0;
    font-size: 1.1rem;
    color: #2c3e50;
}

/* Citation format buttons */
.article-details .citation_display .btn {
    margin-right: 8px;
    margin-bottom: 8px;
    padding: 8px 16px;
    font-size: 0.875rem;
    border-radius: 6px;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

/* Tablet and below */
@media (max-width: 991px) {
    .article-details {
        padding: 30px 24px;
    }
    
    .article-details .article-sidebar {
        padding-right: 15px;
        margin-bottom: 30px;
    }
    
    .article-details .article-main {
        padding-left: 15px;
    }
    
    .article-details header .page-header {
        font-size: 1.75rem;
    }
}

/* Mobile */
@media (max-width: 767px) {
    .article-details {
        padding: 20px 16px;
        border-radius: 0;
    }
    
    .article-details header .page-header {
        font-size: 1.5rem;
        padding-bottom: 16px;
    }
    
    .article-details header .page-header small {
        font-size: 1.1rem;
    }
    
    .article-details .article-sidebar,
    .article-details .article-main {
        padding-left: 0;
        padding-right: 0;
    }
    
    /* Reduce cover image size on mobile */
    .article-details .cover-image {
        max-width: 60%;
        margin-left: auto;
        margin-right: auto;
    }
    
    .article-details .download {
        padding: 16px;
    }
    
    .article-details .article-main .abstract {
        padding: 20px 16px;
    }
    
    /* Stack buttons vertically on mobile */
    .article-details .download .btn,
    .article-details .citation_display .btn {
        display: block;
        width: 100%;
        margin-right: 0;
    }
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
    .article-details {
        box-shadow: none;
        padding: 0;
    }
    
    .article-details .download,
    .article-details .btn {
        display: none;
    }
}