/* Custom styles for Academic Articles Platform */

/* Article content styling */
.article-content {
    font-size: 1.1rem;
    line-height: 1.7;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.article-content h1 {
    font-size: 2.2rem;
    border-bottom: 2px solid var(--bs-primary);
    padding-bottom: 0.5rem;
}

.article-content h2 {
    font-size: 1.8rem;
    color: var(--bs-primary);
}

.article-content h3 {
    font-size: 1.5rem;
}

.article-content p {
    margin-bottom: 1.2rem;
    text-align: justify;
    hyphens: auto;
}

.article-content blockquote {
    border-left: 4px solid var(--bs-primary);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    background-color: rgba(var(--bs-primary-rgb), 0.05);
    padding: 1rem;
    border-radius: 0.25rem;
}

.article-content code {
    background-color: rgba(var(--bs-secondary-rgb), 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9em;
}

.article-content pre {
    background-color: rgba(var(--bs-secondary-rgb), 0.1);
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    border: 1px solid var(--bs-border-color);
}

.article-content pre code {
    background-color: transparent;
    padding: 0;
}

/* Tables in articles */
.article-content table {
    width: 100%;
    margin: 1.5rem 0;
    border-collapse: collapse;
}

.article-content table th,
.article-content table td {
    padding: 0.75rem;
    border: 1px solid var(--bs-border-color);
    text-align: left;
}

.article-content table th {
    background-color: rgba(var(--bs-primary-rgb), 0.1);
    font-weight: 600;
}

.article-content table tbody tr:nth-child(even) {
    background-color: rgba(var(--bs-secondary-rgb), 0.05);
}

/* Lists */
.article-content ul,
.article-content ol {
    margin-bottom: 1.2rem;
    padding-left: 2rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

/* Mathematical expressions */
.MathJax {
    font-size: 1.1em !important;
}

.article-content .MathJax_Display {
    margin: 1.5rem 0;
    text-align: center;
}

/* Card improvements */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: box-shadow 0.15s ease-in-out, transform 0.15s ease-in-out;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    background-color: rgba(var(--bs-primary-rgb), 0.1);
    border-bottom: 1px solid var(--bs-border-color);
}

/* Badge improvements */
.badge {
    font-size: 0.75rem;
    padding: 0.35rem 0.65rem;
}

/* Button improvements */
.btn {
    transition: all 0.15s ease-in-out;
}

.btn:hover {
    transform: translateY(-1px);
}

/* Form improvements */
.form-control:focus,
.form-select:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
}

/* Navigation improvements */
.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.5rem;
}

/* Pagination improvements */
.pagination .page-link {
    color: var(--bs-primary);
    border-color: var(--bs-border-color);
}

.pagination .page-item.active .page-link {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.pagination .page-link:hover {
    background-color: rgba(var(--bs-primary-rgb), 0.1);
    border-color: var(--bs-primary);
    color: var(--bs-primary);
}

/* Footer */
footer {
    background-color: rgba(var(--bs-secondary-rgb), 0.05);
}

/* Print styles */
@media print {
    .navbar,
    .card-footer,
    footer {
        display: none !important;
    }
    
    .card {
        border: none !important;
        box-shadow: none !important;
    }
    
    .article-content {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    .article-content h1,
    .article-content h2,
    .article-content h3 {
        page-break-after: avoid;
    }
    
    .article-content p,
    .article-content blockquote {
        page-break-inside: avoid;
    }
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(var(--bs-primary-rgb), 0.3);
    border-radius: 50%;
    border-top-color: var(--bs-primary);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive improvements */
@media (max-width: 768px) {
    .article-content {
        font-size: 1rem;
    }
    
    .article-content h1 {
        font-size: 1.8rem;
    }
    
    .article-content h2 {
        font-size: 1.5rem;
    }
    
    .article-content h3 {
        font-size: 1.3rem;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
}

/* Accessibility improvements */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--bs-primary);
    outline-offset: 2px;
}

/* Skip to content link for screen readers */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--bs-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 0 0 4px 4px;
    z-index: 1000;
}

.skip-to-content:focus {
    top: 0;
}