/* ==========================================
   CSS VARIABLES
   ========================================== */
:root {
    /* Primary Academic Blue Colors */
    --primary-blue: #003d82;
    --primary-blue-dark: #002a5c;
    --primary-blue-light: #0052a3;
    --accent-blue: #0066cc;
    
    /* Neutral Colors */
    --neutral-dark: #1a1a1a;
    --neutral-medium: #4a4a4a;
    --neutral-light: #6a6a6a;
    --neutral-lighter: #9a9a9a;
    
    /* Background Colors */
    --bg-white: #ffffff;
    --bg-light-gray: #f5f5f5;
    --bg-lighter-gray: #fafafa;
    
    /* Borders */
    --border-color: #d0d0d0;
    --border-light: #e0e0e0;
    
    /* Text Colors */
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6a6a6a;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}


/* ==========================================
   ARTICLE CONTAINER - FULL WIDTH
   ========================================== */
.article-container {
    max-width: 100% !important;
    width: 100% !important;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    background-color: var(--bg-white);
}
.article-header{
	max-width: 1400px;
    margin: 0 auto;
}
/* ==========================================
   ARTICLE WRAPPER - TWO COLUMN LAYOUT
   ========================================== */
.article-wrapper {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-md);
    max-width: 1400px !important;
    margin: var(--spacing-md) auto 0 !important;
    width: 100% !important;
}

.ast-container .orcid-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    background: #A6CE39;
    border-radius: 50%;
    text-decoration: none;
}

/* ==========================================
   BREADCRUMB NAVIGATION
   ========================================== */
.breadcrumb {
    font-size: 0.9rem;
    color: var(--text-muted);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--spacing-lg);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.breadcrumb a {
    color: var(--accent-blue);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--primary-blue-dark);
    text-decoration: underline;
}

.breadcrumb .separator {
    margin: 0 var(--spacing-xs);
    color: var(--neutral-lighter);
}

/* ==========================================
   ARTICLE CONTENT (MAIN COLUMN)
   ========================================== */
.article-content {
    background-color: var(--bg-white);
    min-width: 0; /* Prevents overflow */
}

/* ==========================================
   ARTICLE TYPE BADGE
   ========================================== */
.article-type {
    margin-bottom: var(--spacing-md);
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background-color: var(--primary-blue);
    color: var(--bg-white);
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

/* ==========================================
   ARTICLE TITLE
   ========================================== */
.article-title {
    font-family: Georgia, 'Times New Roman', serif !important;
    font-size: 2.5rem !important;
    font-weight: 700 !important;
    line-height: 1.3 !important;
    color: var(--neutral-dark) !important;
    margin: var(--spacing-lg) 0 var(--spacing-md) 0 !important;
}

/* ==========================================
   ARTICLE AUTHORS
   ========================================== */
.article-authors {
    font-size: 1.15rem !important;
    color: var(--text-secondary) !important;
    margin-bottom: var(--spacing-md) !important;
    font-weight: 500 !important;
    line-height: 1.5 !important;
}

/* ==========================================
   ARTICLE METADATA BAR
   ========================================== */
.article-meta {
    display: flex !important;
    flex-wrap: wrap !important;
    gap: var(--spacing-md) !important;
    padding: var(--spacing-md) 0 !important;
    border-top: 2px solid var(--border-light) !important;
    border-bottom: 2px solid var(--border-light) !important;
    margin-bottom: var(--spacing-lg) !important;
}

.meta-item {
    font-size: 0.95rem;
    color: var(--text-secondary);
    display: inline-block;
}

.meta-item strong {
    color: var(--primary-blue);
    font-weight: 600;
}

.meta-item:not(:last-child)::after {
    content: '|';
    margin-left: var(--spacing-md);
    color: var(--neutral-lighter);
}

/* ==========================================
   ARTICLE ACTIONS (DOI & BUTTONS)
   ========================================== */
.article-actions {
    background-color: var(--bg-light-gray) !important;
    padding: var(--spacing-lg) !important;
    border-radius: var(--radius-md) !important;
    margin-bottom: var(--spacing-xl) !important;
    border: 1px solid var(--border-color) !important;
}

.doi-info {
    font-size: 1rem !important;
    margin-bottom: var(--spacing-md) !important;
    color: var(--text-secondary) !important;
}

.doi-info strong {
    font-weight: 700 !important;
    color: var(--neutral-dark) !important;
}

.doi-info a {
    color: var(--accent-blue) !important;
    font-family: 'Courier New', monospace !important;
    font-size: 0.9rem !important;
    word-break: break-all;
}

.doi-info a:hover {
    text-decoration: underline !important;
}

/* ==========================================
   ACTION BUTTONS
   ========================================== */
.action-buttons {
    display: flex !important;
    gap: var(--spacing-sm) !important;
    flex-wrap: wrap !important;
}

.btn {
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    padding: 0.8rem 1.5rem !important;
    border: none !important;
    border-radius: var(--radius-md) !important;
    font-size: 1rem !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.3s ease !important;
    text-decoration: none !important;
}

.btn-primary {
    background-color: var(--primary-blue) !important;
    color: var(--bg-white) !important;
}

.btn-primary span img{
	filter: invert(1);
}

.btn-primary:hover {
    background-color: var(--primary-blue-dark) !important;
    box-shadow: var(--shadow-md) !important;
}

.btn-secondary {
    background-color: var(--bg-white) !important;
    color: var(--primary-blue) !important;
    border: 2px solid var(--primary-blue) !important;
}

.btn-secondary:hover {
    background-color: var(--primary-blue) !important;
    color: var(--bg-white) !important;
}

.btn-secondary:hover span{
	filter: invert(1);
}

.icon {
    font-size: 1.1rem;
}

/* ==========================================
   ARTICLE SECTIONS
   ========================================== */
.article-section {
    margin-bottom: var(--spacing-xl) !important;
}

.section-title {
    font-family: Georgia, 'Times New Roman', serif !important;
    font-size: 1.8rem !important;
    font-weight: 700 !important;
    color: var(--neutral-dark) !important;
    margin-bottom: var(--spacing-md) !important;
    padding-bottom: var(--spacing-sm) !important;
    border-bottom: 3px solid var(--primary-blue) !important;
}

.section-subtitle {
    font-size: 1.3rem !important;
    font-weight: 600 !important;
    color: var(--neutral-dark) !important;
    margin: var(--spacing-lg) 0 var(--spacing-sm) 0 !important;
}

/* ==========================================
   ABSTRACT
   ========================================== */
.abstract-content {
    font-size: 1.1rem !important;
    line-height: 1.8 !important;
    color: var(--text-secondary) !important;
    text-align: justify !important;
}

.abstract-content p {
    margin-bottom: var(--spacing-md) !important;
}

/* ==========================================
   KEYWORDS
   ========================================== */
.keywords {
    display: flex !important;
    flex-wrap: wrap !important;
    gap: var(--spacing-xs) !important;
}

.keyword-tag {
    display: inline-block !important;
    padding: 0.5rem 1rem !important;
    background-color: var(--bg-light-gray) !important;
    color: var(--text-secondary) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-sm) !important;
    font-size: 0.95rem !important;
    transition: all 0.3s ease !important;
}

.keyword-tag:hover {
    background-color: var(--primary-blue) !important;
    color: var(--bg-white) !important;
    border-color: var(--primary-blue) !important;
}

/* ==========================================
   ARTICLE BODY CONTENT
   ========================================== */
.article-body {
    font-family: Georgia, 'Times New Roman', serif !important;
    font-size: 1.1rem !important;
    line-height: 1.9 !important;
    color: var(--text-primary) !important;
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
    font-family: 'Helvetica Neue', Arial, sans-serif !important;
    margin-top: var(--spacing-xl) !important;
    margin-bottom: var(--spacing-md) !important;
    color: var(--neutral-dark) !important;
    line-height: 1.3 !important;
}

.article-body h1 { font-size: 2rem !important; }
.article-body h2 { font-size: 1.7rem !important; }
.article-body h3 { font-size: 1.4rem !important; }
.article-body h4 { font-size: 1.2rem !important; }

.article-body p {
    margin-bottom: var(--spacing-md) !important;
    text-align: justify !important;
}

.article-body ul,
.article-body ol {
    margin-left: var(--spacing-lg) !important;
    margin-bottom: var(--spacing-md) !important;
}

.article-body li {
    margin-bottom: var(--spacing-xs) !important;
}

.article-body blockquote {
    border-left: 4px solid var(--primary-blue) !important;
    padding-left: var(--spacing-md) !important;
    margin: var(--spacing-lg) 0 !important;
    font-style: italic !important;
    color: var(--text-secondary) !important;
}

.article-body img {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
    margin: var(--spacing-lg) auto !important;
    border-radius: var(--radius-md) !important;
}

.article-body table {
    width: 100% !important;
    border-collapse: collapse !important;
    margin: var(--spacing-lg) 0 !important;
    font-size: 0.95rem !important;
}

.article-body th,
.article-body td {
    padding: var(--spacing-sm) !important;
    border: 1px solid var(--border-color) !important;
    text-align: left !important;
}

.article-body th {
    background-color: var(--bg-light-gray) !important;
    font-weight: 600 !important;
    color: var(--neutral-dark) !important;
}

/* ==========================================
   CITATION SECTION
   ========================================== */
.citation-section {
    background-color: var(--bg-light-gray) !important;
    padding: var(--spacing-lg) !important;
    border-radius: var(--radius-md) !important;
}

.citation-box {
    font-family: 'Courier New', monospace !important;
    font-size: 0.95rem !important;
    color: var(--text-secondary) !important;
    line-height: 1.7 !important;
}

.citation-box p {
    margin: 0 !important;
}

/* ==========================================
   SIDEBAR - STICKY POSITIONING
   ========================================== */
.article-sidebar {
    position: sticky !important;
    top: 6rem !important;
    align-self: start !important;
    height: fit-content !important;
}

.sidebar-box {
    background-color: var(--bg-white) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    padding: var(--spacing-md) !important;
    margin-bottom: var(--spacing-md) !important;
    box-shadow: var(--shadow-sm) !important;
}

.sidebar-title {
    font-size: 1.15rem !important;
    font-weight: 700 !important;
    color: var(--neutral-dark) !important;
    margin-bottom: var(--spacing-md) !important;
    padding-bottom: var(--spacing-sm) !important;
    border-bottom: 2px solid var(--primary-blue) !important;
}

/* ==========================================
   SIDEBAR INFO LIST
   ========================================== */
.info-list {
    list-style: none !important;
    padding: 0 !important;
    margin: 0 !important;
}

.info-list li {
    padding: var(--spacing-xs) 0 !important;
    border-bottom: 1px solid var(--border-light) !important;
    font-size: 0.95rem !important;
    color: var(--text-secondary) !important;
}

.info-list li:last-child {
    border-bottom: none !important;
}

.info-list strong {
    color: var(--neutral-dark) !important;
    font-weight: 600 !important;
}

.info-list a {
    color: var(--accent-blue) !important;
    word-break: break-all !important;
}

/* ==========================================
   SIDEBAR LINKS
   ========================================== */
.link-more {
    display: inline-block !important;
    margin-top: var(--spacing-sm) !important;
    color: var(--accent-blue) !important;
    font-weight: 600 !important;
    font-size: 0.95rem !important;
}

.link-more:hover {
    text-decoration: underline !important;
}

.issn {
    font-size: 0.9rem !important;
    color: var(--text-muted) !important;
    margin: var(--spacing-xs) 0 !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

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

/* Tablet */
@media (max-width: 1200px) {
    .article-container {
        padding: var(--spacing-md);
    }
    
    .article-wrapper {
        grid-template-columns: 1fr 300px !important;
        gap: var(--spacing-lg) !important;
    }
}

@media (max-width: 1024px) {
    .article-wrapper {
        grid-template-columns: 1fr !important;
    }
    
    .article-sidebar {
        position: static !important;
    }
    
    .article-title {
        font-size: 2rem !important;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .article-container {
        padding: var(--spacing-sm);
    }
    
    .article-title {
        font-size: 1.7rem !important;
    }
    
    .article-authors {
        font-size: 1rem !important;
    }
    
    .article-meta {
        flex-direction: column;
        gap: var(--spacing-xs) !important;
    }
    
    .meta-item:not(:last-child)::after {
        content: '';
        margin-left: 0;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100% !important;
        justify-content: center !important;
    }
    
    .section-title {
        font-size: 1.5rem !important;
    }
}

@media (max-width: 480px) {
    .article-title {
        font-size: 1.4rem !important;
    }
    
    .badge {
        font-size: 0.75rem;
        padding: 0.3rem 0.7rem;
    }
    
    .abstract-content {
        font-size: 1rem !important;
        text-align: left !important;
    }
}

/* ==========================================
   PRINT STYLES
   ========================================== */
@media print {
    .article-sidebar,
    .breadcrumb,
    .article-actions,
    .btn {
        display: none !important;
    }
    
    .article-wrapper {
        grid-template-columns: 1fr !important;
    }
    
    body {
        background-color: white;
    }
    
    .article-container {
        padding: 0;
    }
}