/**
 * Front Page Styles for Congo Science
 * Professional academic design with blue and white color scheme
 */

/* ========================================
   Variables CSS - Congo Science Theme
   ======================================== */
:root {
    /* Primary Colors - Blues and Whites */
    --congo-primary-blue: #1e3a8a;
    --congo-secondary-blue: #3b82f6;
    --congo-light-blue: #dbeafe;
    --congo-accent-blue: #0ea5e9;
    --congo-dark-blue: #1e40af;
    
    /* Neutral Colors */
    --congo-white: #ffffff;
    --congo-light-gray: #f8fafc;
    --congo-gray: #64748b;
    --congo-dark-gray: #334155;
    --congo-border: #e2e8f0;
    
    /* Academic Typography */
    --congo-font-heading: var(--font-heading, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif);
    --congo-font-body: var(--font-body, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif);
    --congo-font-mono: var(--font-mono, 'Monaco', 'Consolas', monospace);
    
    /* Spacing */
    --congo-spacing-xs: 0.5rem;
    --congo-spacing-sm: 1rem;
    --congo-spacing-md: 1.5rem;
    --congo-spacing-lg: 2rem;
    --congo-spacing-xl: 3rem;
    --congo-spacing-xxl: 4rem;
    
    /* Effects */
    --congo-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --congo-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --congo-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --congo-border-radius: 8px;
    --congo-transition: all 0.3s ease;
}

/* ========================================
   Front Page Layout
   ======================================== */
.front-page-main {
    background-color: var(--congo-white);
    font-family: var(--congo-font-body);
    line-height: 1.6;
    color: var(--congo-dark-gray);
}

/* ========================================
   Journal Header Section
   ======================================== */
.journal-header-section {
    background: linear-gradient(135deg, var(--congo-primary-blue) 0%, var(--congo-secondary-blue) 100%);
    color: var(--congo-white);
    padding: var(--congo-spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.journal-header-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    transform: translate(50%, -50%);
}

.journal-header-content {
    position: relative;
    z-index: 2;
}

.journal-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 0;
    font-family: var(--congo-font-heading);
    letter-spacing: -0.02em;
}

.journal-subtitle {
    font-size: 1.25rem;
    margin: var(--congo-spacing-sm) 0 var(--congo-spacing-md);
    opacity: 0.9;
    font-weight: 300;
}

.editor-info {
    margin-top: var(--congo-spacing-md);
    font-size: 1rem;
}

.editor-label {
    font-weight: 500;
    opacity: 0.8;
}

.editor-name {
    font-weight: 600;
    margin-left: var(--congo-spacing-xs);
}

.journal-metrics {
    display: flex;
    gap: var(--congo-spacing-lg);
    justify-content: flex-end;
    align-items: center;
}

.metric-item {
    background: rgba(255, 255, 255, 0.15);
    padding: var(--congo-spacing-md) var(--congo-spacing-lg);
    border-radius: var(--congo-border-radius);
    text-align: center;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.metric-label {
    display: block;
    font-size: 0.875rem;
    opacity: 0.8;
    font-weight: 500;
}

.metric-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-top: var(--congo-spacing-xs);
}

/* ========================================
   About Journal Section
   ======================================== */
.about-journal-section {
    
    /* 
    padding: var(--congo-spacing-xxl) 0;
    background-color: var(--congo-white);
        border-top: 1px solid var(--congo-border);
    
     */
    padding-top: 40px;
    padding-bottom: 30px;
    background-color: var(--congo-light-gray);

    border-bottom: 1px solid var(--congo-border);
    min-height: 350px; 
    height: 45vh; 
    max-height: 600px; 
    display: flex; 
    align-items: center; 
    margin-top: -10px;
}

.about-content .section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-lg);
    font-family: var(--congo-font-heading);
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--congo-spacing-lg);
    color: var(--congo-dark-gray);
}

.journal-features {
    display: flex;
    gap: var(--congo-spacing-lg);
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-sm);
    font-weight: 500;
    color: var(--congo-secondary-blue);
}

.feature-item i {
    font-size: 1.25rem;
}

/* ========================================
   Editor-in-Chief Section
   ======================================== */
.editor-chief-section {
    padding: var(--congo-spacing-xxl) 0;
    background: var(--congo-white);
}

.editor-chief-content {
    padding: var(--congo-spacing-xl);
}

.editor-image {
    text-align: center;
    margin-bottom: var(--congo-spacing-lg);
}

.editor-image img {
    max-width: 100%;
    height: auto;
    box-shadow: var(--congo-shadow-md);
    border: 3px solid var(--congo-white);
}

.editor-placeholder {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--congo-light-blue), var(--congo-secondary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow: var(--congo-shadow-md);
}

.editor-placeholder i {
    font-size: 4rem;
    color: var(--congo-white);
}

.editor-info .section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-md);
    font-family: var(--congo-font-heading);
}

.editor-excerpt {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--congo-dark-gray);
    margin-bottom: var(--congo-spacing-lg);
}

.editor-actions {
    margin-top: var(--congo-spacing-lg);
}

.editor-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--congo-spacing-xs);
    padding: var(--congo-spacing-sm) var(--congo-spacing-lg);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--congo-border-radius);
    transition: var(--congo-transition);
    border: 2px solid var(--congo-primary-blue);
}

.editor-actions .btn-outline-primary {
    background-color: transparent;
    color: var(--congo-primary-blue);
}

.editor-actions .btn-outline-primary:hover {
    background-color: var(--congo-primary-blue);
    color: var(--congo-white);
    transform: translateY(-2px);
    box-shadow: var(--congo-shadow-md);
}

.editor-actions .btn.disabled {
    background-color: var(--congo-gray);
    border-color: var(--congo-gray);
    color: var(--congo-white);
    cursor: not-allowed;
    opacity: 0.7;
}

.editor-actions .btn.disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Responsive pour la section Editor */
@media (max-width: 768px) {
    .editor-image {
        margin-bottom: var(--congo-spacing-md);
    }
    
    .editor-placeholder {
        width: 150px;
        height: 150px;
    }
    
    .editor-placeholder i {
        font-size: 3rem;
    }
    
    .editor-info .section-title {
        font-size: 1.75rem;
        text-align: center;
    }
    
    .editor-excerpt {
        text-align: center;
        font-size: 1rem;
    }
    
    .editor-actions {
        text-align: center;
    }
}

.publishing-options-box {
    background: var(--congo-white);
    border-radius: var(--congo-border-radius);
    padding: var(--congo-spacing-xl);
    box-shadow: var(--congo-shadow-lg);
    border: 1px solid var(--congo-border);
    height: fit-content;
}

.box-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-sm);
}

.open-access-badge {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: var(--congo-spacing-xs) var(--congo-spacing-md);
    border-radius: 50px;
    display: inline-block;
    margin-bottom: var(--congo-spacing-md);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.option-description {
    margin-bottom: var(--congo-spacing-md);
    line-height: 1.6;
}

.benefits-list {
    list-style: none;
    padding: 0;
    margin-bottom: var(--congo-spacing-lg);
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-sm);
    margin-bottom: var(--congo-spacing-sm);
    color: var(--congo-dark-gray);
}

.benefits-list i {
    color: #10b981;
    font-size: 0.875rem;
}

/* ========================================
   Timeline Metrics Section
   ======================================== */
.timeline-metrics-section {
    padding: var(--congo-spacing-xl) 0;
    background: var(--congo-white);
    border-top: 1px solid var(--congo-border);
    border-bottom: 1px solid var(--congo-border);
}

.metrics-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--congo-spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-md);
    padding: var(--congo-spacing-lg);
    background: var(--congo-light-gray);
    border-radius: var(--congo-border-radius);
    transition: var(--congo-transition);
}

.timeline-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--congo-shadow-md);
}

.timeline-icon {
    width: 50px;
    height: 50px;
    background: var(--congo-secondary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.timeline-content {
    display: flex;
    flex-direction: column;
}

.timeline-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    line-height: 1.2;
}

.timeline-label {
    font-size: 0.875rem;
    color: var(--congo-gray);
    font-weight: 500;
}

/* ========================================
   Main Articles Section
   ======================================== */
.main-articles-section {
    padding: var(--congo-spacing-xxl) 0;
    background: var(--congo-light-gray);
}

.articles-header {
    margin-bottom: var(--congo-spacing-xl);
}

.articles-header .section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-lg);
    text-align: center;
}

.articles-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: var(--congo-spacing-xl);
}

.nav-tabs {
    border: none;
    background: var(--congo-white);
    border-radius: var(--congo-border-radius);
    padding: var(--congo-spacing-xs);
    box-shadow: var(--congo-shadow-sm);
    display: flex;
    flex-wrap: wrap;
    gap: var(--congo-spacing-xs);
}

.nav-tabs .nav-link {
    background: transparent;
    border: none;
    color: var(--congo-gray);
    font-weight: 500;
    padding: var(--congo-spacing-sm) var(--congo-spacing-md);
    border-radius: calc(var(--congo-border-radius) - 2px);
    transition: var(--congo-transition);
    white-space: nowrap;
}

.nav-tabs .nav-link:hover {
    color: var(--congo-secondary-blue);
    background: var(--congo-light-blue);
}

.nav-tabs .nav-link.active {
    background: var(--congo-secondary-blue);
    color: var(--congo-white);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--congo-spacing-lg);
}

.article-card {
    transition: var(--congo-transition);
    position: relative;
    background:#fff; 
    border-radius:8px; 
    box-shadow:0 2px 8px #0001; 
    padding:1.5rem 1.25rem; 
    margin-bottom:2rem; 
    font-family:sans-serif;
}

.article-card:hover {
    transform: translateY(-4px);
}

.article-info{
    font-size:0.95rem; 
    color:#222; 
    font-weight:400; 
    margin-bottom:0.2em; 
    display:flex; 
    align-items:center; 
    gap:0.5em;
}

.article-title {
    font-size:1.25rem; 
    font-weight:700; 
    color:#181818; 
    margin-bottom:0.7em; 
    line-height:1.3;
}

.article-title a {
    color: var(--congo-primary-blue);
    text-decoration: none;
    transition: var(--congo-transition);
}

.article-title a:hover {
    color: var(--congo-secondary-blue);
    text-decoration: underline;
}

.article-authors {
    color: var(--congo-gray);
    font-style: italic;
    margin-bottom: var(--congo-spacing-sm);
    font-size: 0.95rem;
}

.article-category {
    margin-bottom: var(--congo-spacing-sm);
}

.publication-category {
    display: inline-flex;
    align-items: center;
    gap: var(--congo-spacing-xs);
    background: var(--congo-light-blue);
    color: var(--congo-primary-blue);
    padding: var(--congo-spacing-xs) var(--congo-spacing-sm);
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.publication-category i {
    font-size: 0.75rem;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--congo-spacing-md);
    margin-bottom: var(--congo-spacing-lg);
    font-size: 0.875rem;
    color: var(--congo-gray);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-xs);
}

.article-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--congo-spacing-sm);
}

.doi-link {
    font-size: 0.75rem;
    color: var(--congo-gray);
    font-family: var(--congo-font-mono);
}

.coming-soon {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--congo-spacing-xxl);
    color: var(--congo-gray);
}

.coming-soon i {
    font-size: 3rem;
    margin-bottom: var(--congo-spacing-md);
    color: var(--congo-secondary-blue);
}

/* ========================================
   News & Announcements Section
   ======================================== */
.news-announcements-section {
    padding: var(--congo-spacing-xxl) 0;
    background: var(--congo-white);
}

.news-announcements-section .section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-xl);
}

.announcements-list {
    /* margin-bottom: var(--congo-spacing-lg); */
}

.announcement-item {
    background: var(--congo-light-gray);
    border-radius: var(--congo-border-radius);
    padding: var(--congo-spacing-md);
    /*
    margin-bottom: var(--congo-spacing-lg);
    border-left: 4px solid var(--congo-secondary-blue);
    transition: var(--congo-transition); */
    border:1px solid #ebeef1;
}

.announcement-item:hover {
    box-shadow: var(--congo-shadow-md);
    transform: translateX(4px);
}

.announcement-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--congo-spacing-sm);
}

.announcement-title a {
    color: var(--congo-primary-blue);
    text-decoration: none;
}

.announcement-title a:hover {
    color: var(--congo-secondary-blue);
}

.announcement-excerpt {
    color: var(--congo-dark-gray);
    margin-bottom: var(--congo-spacing-sm);
    line-height: 1.6;
}

.announcement-date {
    font-size: 0.875rem;
    color: var(--congo-gray);
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-xs);
}

.guide-authors-box {
    background: var(--congo-secondary-blue);
    color: var(--congo-white);
    border-radius: var(--congo-border-radius);
    padding: var(--congo-spacing-xl);
    text-align: center;
    height: fit-content;
}

.guide-authors-box .box-title {
    color: var(--congo-white);
    margin-bottom: var(--congo-spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--congo-spacing-sm);
}

.guide-authors-box p {
    margin-bottom: var(--congo-spacing-lg);
    opacity: 0.9;
}

/* ========================================
   Call for Papers Section
   ======================================== */
.call-for-papers-section {
    padding: var(--congo-spacing-xxl) 0;
    background: linear-gradient(135deg, var(--congo-light-blue) 0%, rgba(59, 130, 246, 0.1) 100%);
}

.call-for-papers-box {
    background: var(--congo-white);
    border-radius: var(--congo-border-radius);
    padding: var(--congo-spacing-xxl);
    box-shadow: var(--congo-shadow-lg);
    border: 1px solid var(--congo-border);
}

.call-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-md);
}

.call-title i {
    color: var(--congo-secondary-blue);
}

.call-description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--congo-spacing-lg);
    color: var(--congo-dark-gray);
}

.call-topics h4 {
    font-weight: 600;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-md);
}

.call-topics ul {
    list-style: none;
    padding: 0;
    margin-bottom: var(--congo-spacing-lg);
}

.call-topics li {
    padding: var(--congo-spacing-xs) 0;
    position: relative;
    padding-left: var(--congo-spacing-lg);
}

.call-topics li::before {
    content: '•';
    color: var(--congo-secondary-blue);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.call-deadline {
    background: var(--congo-light-blue);
    padding: var(--congo-spacing-md);
    border-radius: var(--congo-border-radius);
    border-left: 4px solid var(--congo-secondary-blue);
    font-size: 1.125rem;
    color: var(--congo-primary-blue);
}

.call-action {
    display: flex;
    flex-direction: column;
    gap: var(--congo-spacing-md);
    justify-content: center;
    height: 100%;
}

/* ========================================
   Special Issues Section
   ======================================== */
.special-issues-section {
    padding: var(--congo-spacing-xxl) 0;
    background: var(--congo-white);
}

.special-issues-section .section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-xl);
    text-align: center;
}

.special-issues-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--congo-spacing-xl);
}

.special-issue-card {
    background: var(--congo-white);
    border-radius: var(--congo-border-radius);
    border: 1px solid var(--congo-border);
    overflow: hidden;
    transition: var(--congo-transition);
    box-shadow: var(--congo-shadow-sm);
}

.special-issue-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--congo-shadow-lg);
}

.issue-header {
    background: var(--congo-light-gray);
    padding: var(--congo-spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--congo-spacing-md);
}

.issue-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--congo-primary-blue);
    margin: 0;
    line-height: 1.3;
    flex: 1;
}

.issue-status {
    padding: var(--congo-spacing-xs) var(--congo-spacing-sm);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.status-open {
    background: #dcfce7;
    color: #166534;
}

.status-review {
    background: #fef3c7;
    color: #92400e;
}

.status-planning {
    background: var(--congo-light-blue);
    color: var(--congo-primary-blue);
}

.issue-content {
    padding: var(--congo-spacing-lg);
}

.issue-description {
    color: var(--congo-dark-gray);
    margin-bottom: var(--congo-spacing-md);
    line-height: 1.6;
}

.issue-contributors {
    margin-bottom: var(--congo-spacing-md);
    font-size: 0.9rem;
}

.issue-contributors strong {
    color: var(--congo-primary-blue);
}

.issue-contributors span {
    color: var(--congo-gray);
}

.issue-date {
    display: flex;
    align-items: center;
    gap: var(--congo-spacing-xs);
    font-size: 0.875rem;
    color: var(--congo-gray);
    margin-bottom: var(--congo-spacing-lg);
}

.issue-actions {
    padding: var(--congo-spacing-lg);
    background: var(--congo-light-gray);
    display: flex;
    gap: var(--congo-spacing-sm);
    flex-wrap: wrap;
}

/* ========================================
   Footer Navigation Preview
   ======================================== */
.footer-nav-preview {
    padding: var(--congo-spacing-xxl) 0;
    background: var(--congo-primary-blue);
    color: var(--congo-white);
}

.footer-nav-content {
    text-align: left;
}

.nav-group-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--congo-spacing-lg);
    color: var(--congo-white);
}

.nav-group-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-group-links li {
    margin-bottom: var(--congo-spacing-sm);
}

.nav-group-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--congo-transition);
    display: block;
    padding: var(--congo-spacing-xs) 0;
}

.nav-group-links a:hover {
    color: var(--congo-white);
    padding-left: var(--congo-spacing-sm);
}

/* ========================================
   Buttons and Interactive Elements
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--congo-spacing-xs);
    padding: var(--congo-spacing-sm) var(--congo-spacing-lg);
    border-radius: var(--congo-border-radius);
    font-weight: 500;
    text-decoration: none;
    transition: var(--congo-transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 0.95rem;
    line-height: 1.5;
}

.btn-primary {
    background: var(--congo-secondary-blue);
    color: var(--congo-white);
    border-color: var(--congo-secondary-blue);
}

.btn-primary:hover {
    background: var(--congo-primary-blue);
    border-color: var(--congo-primary-blue);
    transform: translateY(-1px);
}

.btn-outline-primary {
    background: transparent;
    color: var(--congo-secondary-blue);
    border-color: var(--congo-secondary-blue);
}

.btn-outline-primary:hover {
    background: var(--congo-secondary-blue);
    color: var(--congo-white);
}

.btn-outline-secondary {
    background: transparent;
    color: var(--congo-gray);
    border-color: var(--congo-border);
}

.btn-outline-secondary:hover {
    background: var(--congo-gray);
    color: var(--congo-white);
    border-color: var(--congo-gray);
}

.btn-lg {
    padding: var(--congo-spacing-md) var(--congo-spacing-xl);
    font-size: 1.125rem;
}

.btn-sm {
    padding: var(--congo-spacing-xs) var(--congo-spacing-md);
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ========================================
   About Actions Section
   ======================================== */
.about-actions {
    margin-top: var(--congo-spacing-lg);
}

.about-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--congo-spacing-xs);
    padding: var(--congo-spacing-sm) var(--congo-spacing-lg);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--congo-border-radius);
    transition: var(--congo-transition);
    border: 2px solid var(--congo-primary-blue);
}

.about-actions .btn-primary {
    background-color: var(--congo-primary-blue);
    color: var(--congo-white);
}

.about-actions .btn-primary:hover {
    background-color: var(--congo-dark-blue);
    border-color: var(--congo-dark-blue);
    transform: translateY(-2px);
    box-shadow: var(--congo-shadow-md);
}

.about-actions .btn.disabled {
    background-color: var(--congo-gray);
    border-color: var(--congo-gray);
    color: var(--congo-white);
    cursor: not-allowed;
    opacity: 0.7;
}

.about-actions .btn.disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1200px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .special-issues-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

@media (max-width: 992px) {
    .journal-title {
        font-size: 2.5rem;
    }
    
    .journal-metrics {
        justify-content: center;
        margin-top: var(--congo-spacing-lg);
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .special-issues-grid {
        grid-template-columns: 1fr;
    }
    
    .metrics-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-tabs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-tabs .nav-link {
        text-align: center;
    }
}

@media (max-width: 768px) {
    :root {
        --congo-spacing-xxl: 2rem;
        --congo-spacing-xl: 1.5rem;
    }
    
    .journal-title {
        font-size: 2rem;
    }
    
    .journal-subtitle {
        font-size: 1rem;
    }
    
    .metrics-timeline {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        flex-direction: column;
        text-align: center;
    }
    
    .journal-features {
        flex-direction: column;
        gap: var(--congo-spacing-sm);
    }
    
    .call-for-papers-box {
        padding: var(--congo-spacing-lg);
    }
    
    .call-title {
        font-size: 1.5rem;
        flex-direction: column;
        text-align: center;
        gap: var(--congo-spacing-sm);
    }
    
    .issue-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--congo-spacing-sm);
    }
    
    .issue-actions {
        flex-direction: column;
    }
    
    .btn-block {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .publishing-options-box,
    .guide-authors-box {
        margin-top: var(--congo-spacing-lg);
    }
    
    .article-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        justify-content: center;
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .front-page-main {
        background: white !important;
        color: black !important;
    }
    
    .journal-header-section {
        background: white !important;
        color: black !important;
        border-bottom: 2px solid black;
    }
    
    .btn,
    .timeline-item:hover,
    .article-card:hover,
    .special-issue-card:hover {
        transform: none !important;
        box-shadow: none !important;
    }
    
    .footer-nav-preview {
        background: white !important;
        color: black !important;
        border-top: 2px solid black;
    }
}

/* ========================================
   Accessibility Enhancements
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus states for better accessibility */
.btn:focus,
.nav-link:focus,
a:focus {
    outline: 2px solid var(--congo-secondary-blue);
    outline-offset: 2px;
}

.about-content .section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--congo-primary-blue);
    margin-bottom: var(--congo-spacing-lg);
    font-family: var(--congo-font-heading);
}

/* About Image Styles */
.about-image {
    margin-bottom: var(--congo-spacing-lg);
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: var(--congo-border-radius);
    box-shadow: var(--congo-shadow-lg);
    transition: var(--congo-transition);
}

.about-image img:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.about-placeholder {
    background: linear-gradient(135deg, var(--congo-light-blue) 0%, var(--congo-secondary-blue) 100%);
    border-radius: var(--congo-border-radius);
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--congo-shadow-lg);
    transition: var(--congo-transition);
}

.about-placeholder:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.about-placeholder i {
    font-size: 4rem;
    color: var(--congo-white);
    opacity: 0.8;
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--congo-spacing-lg);
    color: var(--congo-dark-gray);
}