/* Blog styles for RSP-REQ-025 (Blog System & Initial Content) */

.blog-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.blog-index {
    padding: 2rem 0;
    min-height: 60vh;
}

.blog-index h1 {
    color: var(--text);
    font-size: 2rem;
    margin-bottom: 2rem;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.blog-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.blog-card:hover {
    box-shadow: 0 4px 12px var(--shadow);
    transform: translateY(-2px);
}

.blog-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.blog-card-category {
    background: var(--primary);
    color: var(--card-bg);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.blog-card-read-time {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.blog-card-title {
    font-size: 1.25rem;
    margin: 0.5rem 0;
    line-height: 1.4;
}

.blog-card-title a {
    color: var(--text);
    text-decoration: none;
}

.blog-card-title a:hover {
    color: var(--primary);
}

.blog-card-excerpt {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.blog-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.blog-card-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.blog-empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.blog-post {
    padding: 2rem 0;
    min-height: 60vh;
}

.blog-post-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 2rem;
    align-items: start;
}

.blog-post-main {
    min-width: 0;
}

.blog-post-header {
    margin-bottom: 2rem;
}

.blog-post-category {
    background: var(--primary);
    color: var(--card-bg);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.blog-post-header h1 {
    color: var(--text);
    font-size: 2rem;
    margin: 0.75rem 0;
    line-height: 1.3;
}

.blog-post-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.blog-post-separator {
    color: var(--border);
}

.blog-post-content {
    line-height: 1.8;
    font-size: 1.05rem;
    color: var(--text);
}

.blog-post-content h2 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
    color: var(--text);
}

.blog-post-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    color: var(--text);
}

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

.blog-post-content ul,
.blog-post-content ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

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

.blog-post-content code {
    background: var(--border);
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    font-size: 0.9em;
}

.blog-post-content pre {
    background: var(--border);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.blog-post-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-muted);
    font-style: italic;
}

.blog-post-content a {
    color: var(--secondary);
    text-decoration: underline;
}

.blog-post-content a:hover {
    color: var(--secondary-dark);
}

.blog-post-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.blog-post-content th,
.blog-post-content td {
    border: 1px solid var(--border);
    padding: 0.5rem 0.75rem;
    text-align: left;
}

.blog-post-content th {
    background: var(--border);
    font-weight: 600;
}

.blog-post-footer {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.blog-cross-lang-link {
    display: inline-block;
    margin-bottom: 1.5rem;
    color: var(--secondary);
    font-weight: 600;
    text-decoration: none;
}

.blog-cross-lang-link:hover {
    text-decoration: underline;
}

.blog-social-sharing {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--text);
    background: var(--card-bg);
    cursor: pointer;
    transition: background-color 0.2s;
    min-width: 44px;
    min-height: 44px;
}

.social-btn:hover {
    background: var(--border);
    text-decoration: none;
}

.social-btn:focus-visible {
    outline: 3px solid var(--secondary);
    outline-offset: 2px;
}

.social-twitter {
    color: var(--card-bg);
    background: var(--text);
    border-color: var(--text);
}

.social-twitter:hover {
    opacity: 0.9;
    background: var(--text);
}

.blog-sidebar {
    position: sticky;
    top: 5rem;
}

.blog-sidebar h3 {
    color: var(--text);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.blog-sidebar ul {
    list-style: none;
    padding: 0;
}

.blog-sidebar li {
    margin-bottom: 0.5rem;
}

.blog-sidebar li a {
    color: var(--secondary);
    text-decoration: none;
}

.blog-sidebar li a:hover {
    text-decoration: underline;
}

.sidebar-cta {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    text-align: center;
}

.sidebar-cta h3 {
    margin-bottom: 0.5rem;
}

.sidebar-cta p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.ad-slot {
    background: var(--border);
    border-radius: 4px;
    min-height: 90px;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

@media (max-width: 1024px) {
    .blog-post-layout {
        grid-template-columns: 1fr;
    }

    .blog-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .blog-container {
        padding: 1.5rem 1rem;
    }

    .blog-post-header h1 {
        font-size: 1.5rem;
    }

    .blog-social-sharing {
        gap: 0.5rem;
    }

    .social-btn {
        font-size: 0;
        min-width: 44px;
        min-height: 44px;
        padding: 0.5rem;
    }

    .social-twitter::after { content: "X"; font-size: 0.85rem; }
    .social-facebook::after { content: "F"; font-size: 0.85rem; }
    .social-linkedin::after { content: "in"; font-size: 0.85rem; }
    .social-copy::after { content: "🔗"; font-size: 0.85rem; }
}

@media (max-width: 425px) {
    .blog-post-layout {
        grid-template-columns: 1fr;
    }

    .blog-card {
        padding: 1rem;
    }

    .blog-post-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .blog-post-separator {
        display: none;
    }
}

@media (min-width: 1440px) {
    .blog-container {
        max-width: 1200px;
    }
}