/**
 * Nebula Theme - Single Article Page Styles
 * Version: 2.0.5
 */

/* Article Header */
.nebula-article-header {
    padding: 48px 0 32px;
    background: var(--nebula-bg-secondary, #F8FAFC);
    border-bottom: 1px solid var(--nebula-border, #E2E8F0);
}

.nebula-article-header__cats {
    margin-bottom: 16px;
}

.nebula-article-header__cat {
    display: inline-block;
    padding: 6px 16px;
    background: var(--nebula-primary, #0EA5E9);
    color: #fff;
    font-size: 0.85rem;
    font-weight: var(--nebula-font-medium, 500);
    border-radius: var(--nebula-radius-full, 9999px);
    text-decoration: none;
    transition: all var(--nebula-duration-fast, 0.15s);
}

.nebula-article-header__cat:hover {
    background: var(--nebula-primary-hover, #0284C7);
}

.nebula-article-header__title {
    font-size: var(--nebula-text-4xl, 2.25rem);
    font-weight: var(--nebula-font-bold, 700);
    color: var(--nebula-text, #1E293B);
    line-height: 1.3;
    margin-bottom: 24px;
    max-width: 900px;
}

.nebula-article-header__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.nebula-article-header__author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nebula-article-header__avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.nebula-article-header__author-info {
    display: flex;
    flex-direction: column;
}

.nebula-article-header__author-name {
    font-size: 0.95rem;
    font-weight: var(--nebula-font-semibold, 600);
    color: var(--nebula-text, #1E293B);
    text-decoration: none;
}

.nebula-article-header__author-name:hover {
    color: var(--nebula-primary, #0EA5E9);
}

.nebula-article-header__date {
    font-size: 0.8rem;
    color: var(--nebula-text-muted, #94A3B8);
}

.nebula-article-header__stats {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nebula-article-header__views,
.nebula-article-header__comments {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--nebula-text-secondary, #64748b);
}

.nebula-article-header__share {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nebula-article-header__share-label {
    font-size: 0.875rem;
    color: var(--nebula-text-muted, #94A3B8);
}

.nebula-article-header__share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--nebula-bg, #FFFFFF);
    border: 1px solid var(--nebula-border, #E2E8F0);
    border-radius: 50%;
    color: var(--nebula-text-secondary, #64748b);
    cursor: pointer;
    transition: all var(--nebula-duration-fast, 0.15s);
}

.nebula-article-header__share-btn:hover {
    background: var(--nebula-primary, #0EA5E9);
    border-color: var(--nebula-primary, #0EA5E9);
    color: #fff;
}

/* Featured Image */
.nebula-article-featured-image {
    padding: 32px 0;
    background: var(--nebula-bg, #FFFFFF);
}

.nebula-article-featured-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--nebula-radius-xl, 16px);
    box-shadow: var(--nebula-shadow-lg, 0 10px 15px rgba(0, 0, 0, 0.1));
}

/* Article Content Wrapper */
.nebula-article-content-wrapper {
    padding: 48px 0;
}

.nebula-article-layout {
    display: flex;
    gap: 48px;
    align-items: flex-start;
}

.nebula-article-main {
    flex: 1;
    min-width: 0;
}

/* Article Content */
.nebula-article-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--nebula-text, #1E293B);
    max-width: 720px;
}

.nebula-article-content h2 {
    font-size: 1.75rem;
    font-weight: var(--nebula-font-bold, 700);
    color: var(--nebula-text, #1E293B);
    margin: 40px 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--nebula-border, #E2E8F0);
}

.nebula-article-content h3 {
    font-size: 1.35rem;
    font-weight: var(--nebula-font-bold, 700);
    color: var(--nebula-text, #1E293B);
    margin: 32px 0 16px;
}

.nebula-article-content p {
    margin-bottom: 20px;
}

.nebula-article-content a {
    color: var(--nebula-primary, #0EA5E9);
    text-decoration: underline;
}

.nebula-article-content a:hover {
    color: var(--nebula-primary-hover, #0284C7);
}

.nebula-article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--nebula-radius-lg, 12px);
    margin: 24px 0;
}

.nebula-article-content blockquote {
    position: relative;
    margin: 32px 0;
    padding: 24px 32px;
    background: var(--nebula-bg-secondary, #F8FAFC);
    border-left: 4px solid var(--nebula-primary, #0EA5E9);
    border-radius: 0 var(--nebula-radius-lg, 12px) var(--nebula-radius-lg, 12px) 0;
    font-style: italic;
}

.nebula-article-content blockquote p:last-child {
    margin-bottom: 0;
}

.nebula-article-content pre,
.nebula-article-content code {
    font-family: var(--nebula-font-mono, monospace);
}

.nebula-article-content pre {
    background: var(--nebula-secondary, #0F172A);
    color: #E2E8F0;
    padding: 20px 24px;
    border-radius: var(--nebula-radius-lg, 12px);
    overflow-x: auto;
    margin: 24px 0;
}

.nebula-article-content code {
    background: var(--nebula-bg-secondary, #F8FAFC);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

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

.nebula-article-content ul,
.nebula-article-content ol {
    margin: 20px 0;
    padding-left: 28px;
}

.nebula-article-content li {
    margin-bottom: 8px;
}

.nebula-article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.nebula-article-content th,
.nebula-article-content td {
    padding: 12px 16px;
    border: 1px solid var(--nebula-border, #E2E8F0);
}

.nebula-article-content th {
    background: var(--nebula-bg-secondary, #F8FAFC);
    font-weight: var(--nebula-font-semibold, 600);
}

/* Article Tags */
.nebula-article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--nebula-border, #E2E8F0);
}

.nebula-article-tags__label {
    font-size: 0.875rem;
    font-weight: var(--nebula-font-semibold, 600);
    color: var(--nebula-text-secondary, #64748b);
}

.nebula-article-tags__tag {
    display: inline-block;
    padding: 6px 14px;
    background: var(--nebula-bg-secondary, #F8FAFC);
    border: 1px solid var(--nebula-border, #E2E8F0);
    border-radius: var(--nebula-radius-full, 9999px);
    font-size: 0.85rem;
    color: var(--nebula-text-secondary, #64748b);
    text-decoration: none;
    transition: all var(--nebula-duration-fast, 0.15s);
}

.nebula-article-tags__tag:hover {
    background: var(--nebula-primary, #0EA5E9);
    border-color: var(--nebula-primary, #0EA5E9);
    color: #fff;
}

/* Article Actions */
.nebula-article-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 32px;
    padding: 24px;
    background: var(--nebula-bg-secondary, #F8FAFC);
    border-radius: var(--nebula-radius-xl, 16px);
}

.nebula-article-actions__like {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--nebula-bg, #FFFFFF);
    border: 2px solid var(--nebula-primary, #0EA5E9);
    border-radius: var(--nebula-radius-full, 9999px);
    color: var(--nebula-primary, #0EA5E9);
    font-size: 0.95rem;
    font-weight: var(--nebula-font-semibold, 600);
    cursor: pointer;
    transition: all var(--nebula-duration-fast, 0.15s);
}

.nebula-article-actions__like:hover {
    background: var(--nebula-primary, #0EA5E9);
    color: #fff;
}

.nebula-article-actions__like.liked {
    background: var(--nebula-error, #EF4444);
    border-color: var(--nebula-error, #EF4444);
    color: #fff;
}

.nebula-article-actions__share {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.875rem;
    color: var(--nebula-text-secondary, #64748b);
}

.nebula-article-actions__share-btn {
    padding: 8px 16px;
    background: var(--nebula-bg, #FFFFFF);
    border: 1px solid var(--nebula-border, #E2E8F0);
    border-radius: var(--nebula-radius-md, 8px);
    color: var(--nebula-text-secondary, #64748b);
    cursor: pointer;
    transition: all var(--nebula-duration-fast, 0.15s);
}

.nebula-article-actions__share-btn:hover {
    background: var(--nebula-primary, #0EA5E9);
    border-color: var(--nebula-primary, #0EA5E9);
    color: #fff;
}

/* Article Navigation */
.nebula-article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
}

.nebula-article-nav__item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    background: var(--nebula-bg, #FFFFFF);
    border: 1px solid var(--nebula-border, #E2E8F0);
    border-radius: var(--nebula-radius-lg, 12px);
    text-decoration: none;
    transition: all var(--nebula-duration-fast, 0.15s);
}

.nebula-article-nav__item:hover {
    border-color: var(--nebula-primary, #0EA5E9);
    box-shadow: var(--nebula-shadow-md, 0 4px 6px rgba(0, 0, 0, 0.07));
}

.nebula-article-nav__item--next {
    text-align: right;
}

.nebula-article-nav__label {
    font-size: 0.8rem;
    color: var(--nebula-text-muted, #94A3B8);
}

.nebula-article-nav__title {
    font-size: 0.95rem;
    font-weight: var(--nebula-font-medium, 500);
    color: var(--nebula-text, #1E293B);
}

/* Article Sidebar */
.nebula-article-sidebar {
    width: 320px;
    flex-shrink: 0;
    position: sticky;
    top: 100px;
}

/* Related Posts */
.nebula-related-posts {
    padding: 60px 0;
    background: var(--nebula-bg-secondary, #F8FAFC);
}

.nebula-related-posts__title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: var(--nebula-text-2xl, 1.5rem);
    font-weight: var(--nebula-font-bold, 700);
    color: var(--nebula-text, #1E293B);
    margin-bottom: 32px;
}

.nebula-related-posts__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.nebula-related-post {
    background: var(--nebula-bg, #FFFFFF);
    border-radius: var(--nebula-radius-xl, 16px);
    overflow: hidden;
    box-shadow: var(--nebula-shadow-card, 0 4px 20px rgba(0, 0, 0, 0.08));
    transition: all var(--nebula-duration-normal, 0.2s);
}

.nebula-related-post:hover {
    transform: translateY(-4px);
    box-shadow: var(--nebula-shadow-card-hover, 0 8px 30px rgba(0, 0, 0, 0.12));
}

.nebula-related-post__thumbnail {
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.nebula-related-post__thumbnail a {
    display: block;
    width: 100%;
    height: 100%;
}

.nebula-related-post__thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--nebula-duration-slow, 0.3s);
}

.nebula-related-post:hover .nebula-related-post__thumbnail img {
    transform: scale(1.05);
}

.nebula-related-post__content {
    padding: 16px;
}

.nebula-related-post__title {
    font-size: 1rem;
    font-weight: var(--nebula-font-semibold, 600);
    color: var(--nebula-text, #1E293B);
    margin-bottom: 8px;
    line-height: 1.4;
}

.nebula-related-post__title a {
    color: inherit;
    text-decoration: none;
}

.nebula-related-post__title a:hover {
    color: var(--nebula-primary, #0EA5E9);
}

.nebula-related-post__date {
    font-size: 0.8rem;
    color: var(--nebula-text-muted, #94A3B8);
}

/* Responsive */
@media (max-width: 1024px) {
    .nebula-article-layout {
        flex-direction: column;
    }

    .nebula-article-sidebar {
        width: 100%;
        position: static;
    }
}

@media (max-width: 768px) {
    .nebula-article-header {
        padding: 32px 0 24px;
    }

    .nebula-article-header__title {
        font-size: var(--nebula-text-2xl, 1.5rem);
    }

    .nebula-article-header__meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .nebula-article-content {
        font-size: 1rem;
    }

    .nebula-article-nav {
        grid-template-columns: 1fr;
    }

    .nebula-article-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .nebula-article-actions__like {
        justify-content: center;
    }

    .nebula-related-posts__grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   TOC Mobile Drawer (Mobile Only)
   ============================================================================ */
.nebula-toc-drawer-toggle {
    display: none;
    position: fixed;
    bottom: 80px;
    right: 20px;
    z-index: var(--nebula-z-sticky, 200);
    width: 48px;
    height: 48px;
    background: var(--nebula-primary, #0EA5E9);
    border: none;
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    box-shadow: var(--nebula-shadow-lg, 0 10px 15px rgba(0, 0, 0, 0.1));
    transition: all 0.2s ease;
}
.nebula-toc-drawer-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--nebula-shadow-xl, 0 20px 25px rgba(0, 0, 0, 0.15));
}

.nebula-toc-drawer {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: min(300px, 85vw);
    height: 100vh;
    background: var(--nebula-bg, #fff);
    z-index: var(--nebula-z-modal, 500);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    box-shadow: -6px 0 24px rgba(0, 0, 0, 0.15);
}
.nebula-toc-drawer.is-open {
    transform: translateX(0);
}
.nebula-toc-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--nebula-primary, #0EA5E9);
    color: #fff;
}
.nebula-toc-drawer__title {
    font-size: 1rem;
    font-weight: 600;
}
.nebula-toc-drawer__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255,255,255,0.2);
    border: none;
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    transition: all 0.2s ease;
}
.nebula-toc-drawer__close:hover {
    background: rgba(255,255,255,0.3);
    transform: rotate(90deg);
}
.nebula-toc-drawer__content {
    padding: 20px;
}
.nebula-toc-drawer__nav {
    list-style: none;
    margin: 0;
    padding: 0;
}
.nebula-toc-drawer__nav li {
    margin-bottom: 12px;
}
.nebula-toc-drawer__nav a {
    display: block;
    padding: 10px 16px;
    color: var(--nebula-text, #1E293B);
    text-decoration: none;
    border-left: 3px solid var(--nebula-border, #E2E8F0);
    transition: all 0.2s ease;
}
.nebula-toc-drawer__nav a:hover,
.nebula-toc-drawer__nav a.is-active {
    color: var(--nebula-primary, #0EA5E9);
    border-left-color: var(--nebula-primary, #0EA5E9);
    background: var(--nebula-primary-light, #E0F2FE);
}

@media (max-width: 768px) {
    /* Show TOC drawer toggle on mobile */
    .nebula-toc-drawer-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .nebula-toc-drawer {
        display: block;
    }
    /* Hide desktop TOC sidebar on mobile */
    .nebula-toc-sidebar {
        display: none;
    }
}

/* ============================================================================
   Code Block Styles with Copy Button
   ============================================================================ */

.nebula-code-block {
    position: relative;
    margin: 24px 0;
}

.nebula-code-block pre {
    background: #2d2d2d;
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.6;
}

.nebula-code-block code[class*="language-"] {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    background: none;
    padding: 0;
    border-radius: 0;
}

/* Copy Button */
.nebula-code-copy-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: #fff;
    font-size: 0.8rem;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
}

.nebula-code-block:hover .nebula-code-copy-btn {
    opacity: 1;
}

.nebula-code-copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.nebula-code-copy-btn svg {
    flex-shrink: 0;
}

.nebula-code-copy-btn--success {
    background: rgba(34, 197, 94, 0.3) !important;
    border-color: rgba(34, 197, 94, 0.5) !important;
    color: #4ade80 !important;
}

/* Dark mode adjustments */
[data-theme="dark"] .nebula-code-block pre {
    background: #1a1a1a;
}

[data-theme="dark"] .nebula-code-copy-btn {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .nebula-code-copy-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}