/* Blog System Styles */

/* Blog Grid */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    position: relative;
    z-index: 1;
}

.blog-card {
    background: var(--card-bg, #ffffff);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color, #e5e7eb);
    position: relative;
}

.blog-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.blog-card-header {
    padding: 1.5rem;
    border-bottom: none;
    background: var(--primary-color, #3b82f6);
    color: #ffffff;
}

.blog-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ffffff;
    line-height: 1.3;
}

.blog-card-title a { color: #ffffff; }
.blog-card-title a:hover { color: #ffffff; opacity: 0.9; }

.blog-card-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.85);
}

.blog-card-content {
    padding: 1.5rem;
}

.blog-card-excerpt {
    color: var(--text-secondary, #6b7280);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.blog-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.blog-card-footer {
    padding: 0 1.5rem 1.5rem;
}

.read-more-btn {
    background: var(--primary-color, #3b82f6);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.read-more-btn:hover {
    background: var(--primary-hover, #2563eb);
}

.read-more-btn i {
    transition: transform 0.3s ease;
}

.read-more-btn:hover i {
    transform: translateX(4px);
}

/* Search Bar */
.search-container {
    margin-bottom: 2rem;
    position: relative;
    z-index: 5; /* keep search above grid */
}

.search-input {
    width: 100%;
    max-width: 500px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
}

/* Loading Spinner */
.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color, #e5e7eb);
    border-top: 4px solid var(--primary-color, #3b82f6);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* No Results */
.no-results {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary, #6b7280);
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Article Modal */
.article-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 3000; /* above header (2000) */
    overflow-y: auto;
}

.article-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal-content {
    background: var(--card-bg, #ffffff);
    border-radius: 12px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: none;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--primary-color, #3b82f6);
}

.modal-header .modal-title {
    color: #ffffff;
    font-weight: 700;
    font-size: 1.5rem;
    margin: 0;
}

.close-modal {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary, #6b7280);
    padding: 0.5rem;
    line-height: 1;
    border-radius: 4px;
    transition: color 0.3s ease, background-color 0.3s ease;
}

.close-modal:hover {
    color: var(--text-primary, #1f2937);
    background: var(--bg-secondary, #f3f4f6);
}

.modal-body {
    padding: 0 1.5rem;
    overflow-y: auto;
    max-height: calc(90vh - 200px);
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color, #e5e7eb);
}

/* Full Article Styles */
.full-article {
    line-height: 1.7;
}

.article-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color, #e5e7eb);
}

.article-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary, #1f2937);
    line-height: 1.2;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary, #6b7280);
}

.article-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.article-content {
    color: var(--text-primary, #374151);
}

.article-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2rem 0 1rem 0;
    color: var(--text-primary, #1f2937);
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem 0;
    color: var(--text-primary, #1f2937);
}

.article-content p {
    margin-bottom: 1rem;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

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

.article-content pre {
    background: var(--code-bg, #1f2937);
    color: var(--code-text, #f9fafb);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1rem 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
}

.article-content code {
    background: var(--code-inline-bg, #f3f4f6);
    color: var(--code-inline-text, #374151);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
}

.article-content pre code {
    background: none;
    color: inherit;
    padding: 0;
}

.article-content blockquote {
    border-left: 4px solid var(--primary-color, #3b82f6);
    padding-left: 1rem;
    margin: 1rem 0;
    font-style: italic;
    color: var(--text-secondary, #6b7280);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 1rem 0;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.article-content th,
.article-content td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
}

.article-content th {
    background: var(--bg-secondary, #f3f4f6);
    font-weight: 600;
}

/* Share Buttons */
.share-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 6px;
    background: var(--card-bg, #ffffff);
    color: var(--text-primary, #374151);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.twitter-share:hover {
    background: #1da1f2;
    color: white;
    border-color: #1da1f2;
}

.linkedin-share:hover {
    background: #0077b5;
    color: white;
    border-color: #0077b5;
}

.facebook-share:hover {
    background: #4267b2;
    color: white;
    border-color: #4267b2;
}

/* Tags */
.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--tag-bg, #e0e7ff);
    color: var(--tag-text, #4338ca);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Error Message */
.error-message {
    text-align: center;
    padding: 3rem;
    color: var(--error-color, #dc2626);
}

.error-message i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .article-modal.active {
        padding: 1rem;
    }
    
    .modal-content {
        max-height: 95vh;
    }
    
    .modal-body {
        max-height: calc(95vh - 180px);
    }
    
    .article-title {
        font-size: 1.5rem;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .share-buttons {
        justify-content: center;
    }
    
    .search-input {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .blog-card-header,
    .blog-card-content,
    .blog-card-footer {
        padding: 1rem;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }
    
    .article-title {
        font-size: 1.25rem;
    }
    
    .article-content h2 {
        font-size: 1.25rem;
    }
    
    .article-content h3 {
        font-size: 1.1rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --card-bg: #1f2937;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --border-color: #374151;
        --bg-secondary: #374151;
        --code-inline-bg: #374151;
        --code-inline-text: #f9fafb;
        --tag-bg: #3730a3;
        --tag-text: #c7d2fe;
    }
    
    .article-content pre {
        background: #111827;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .blog-card {
        border: 2px solid var(--text-primary, #1f2937);
    }
    
    .read-more-btn {
        border: 2px solid var(--primary-color, #3b82f6);
    }
    
    .tag {
        border: 1px solid var(--tag-text, #4338ca);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .blog-card,
    .read-more-btn,
    .share-btn {
        transition: none;
    }
    
    .spinner {
        animation: none;
    }
}