/* ===== Blog Layout ===== */
.blog-layout {
    min-height: 100vh;
    background: var(--color-bg);
}

/* ===== Blog Header ===== */
.blog-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0;
}

.blog-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.blog-header .logo {
    font-size: 18px;
}

.blog-header .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
}

.blog-nav {
    display: flex;
    gap: 24px;
}

.blog-nav a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.blog-nav a:hover {
    color: var(--color-text);
}

/* ===== Blog Hero ===== */
.blog-hero {
    padding: 64px 0;
    background: var(--color-bg-secondary);
    text-align: center;
}

.blog-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.blog-hero p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Industry Filter ===== */
.filter-section {
    padding: 24px 0;
    border-bottom: 1px solid var(--color-border);
}

.filter-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* ===== Blog Posts Grid ===== */
.blog-posts-section {
    padding: 48px 0;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 32px;
}

.post-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    text-decoration: none;
    display: block;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.post-card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.post-card-content {
    padding: 24px;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.post-card-industry {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    background: rgba(124, 58, 237, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    text-transform: capitalize;
}

.post-card-date {
    font-size: 13px;
    color: var(--color-text-muted);
}

.post-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-excerpt {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.post-card-keyword {
    font-size: 12px;
    color: var(--color-text-muted);
    background: var(--color-bg-secondary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

/* ===== Single Post Page ===== */
.post-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}

.post-header {
    margin-bottom: 40px;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.post-industry {
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 500;
    background: rgba(124, 58, 237, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    text-transform: capitalize;
}

.post-date {
    font-size: 14px;
    color: var(--color-text-muted);
}

.post-title {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 16px;
}

.post-excerpt {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===== Post Content ===== */
.post-content {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
    margin-top: 2em;
    margin-bottom: 0.75em;
}

.post-content h2 {
    font-size: 1.75rem;
}

.post-content h3 {
    font-size: 1.375rem;
}

.post-content p {
    margin-bottom: 1.5em;
}

.post-content ul,
.post-content ol {
    margin-bottom: 1.5em;
    padding-left: 1.5em;
}

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

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

.post-content a:hover {
    text-decoration: none;
}

.post-content blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: 24px;
    margin: 2em 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.post-content code {
    background: var(--color-bg-secondary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

.post-content pre {
    background: var(--color-secondary);
    color: white;
    padding: 20px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 1.5em 0;
}

.post-content pre code {
    background: none;
    padding: 0;
}

/* ===== Related Posts ===== */
.related-posts {
    margin-top: 64px;
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}

.related-posts h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* ===== Empty State ===== */
.blog-empty {
    text-align: center;
    padding: 80px 24px;
}

.blog-empty-icon {
    width: 80px;
    height: 80px;
    background: var(--color-bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--color-text-muted);
}

.blog-empty h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.blog-empty p {
    color: var(--color-text-muted);
}

/* ===== Blog Footer ===== */
.blog-footer {
    padding: 32px 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.blog-footer p {
    font-size: 14px;
    color: var(--color-text-muted);
}

.blog-footer a {
    color: var(--color-primary);
}

/* ===== Loading ===== */
.blog-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== Subscribe Section ===== */
.subscribe-section {
    padding: 48px 0 64px;
}

.subscribe-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, #a855f7 100%);
    border-radius: var(--radius-xl);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
}

.subscribe-content h2 {
    font-size: 1.5rem;
    color: white;
    margin-bottom: 8px;
}

.subscribe-content p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
}

.subscribe-form {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.subscribe-form input {
    padding: 12px 16px;
    font-size: 15px;
    border: none;
    border-radius: var(--radius-md);
    min-width: 280px;
    background: white;
}

.subscribe-form input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.subscribe-form button {
    padding: 12px 24px;
    background: #1e293b;
    color: white;
    font-weight: 600;
    border-radius: var(--radius-md);
    white-space: nowrap;
}

.subscribe-form button:hover {
    background: #0f172a;
}

.subscribe-success {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
    font-weight: 500;
}

.subscribe-success .success-icon {
    width: 24px;
    height: 24px;
    background: white;
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

/* ===== Post Subscribe (in article) ===== */
.post-subscribe {
    margin-top: 64px;
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}

.post-subscribe .subscribe-card {
    padding: 32px;
    flex-direction: column;
    text-align: center;
}

.post-subscribe .subscribe-card h3 {
    font-size: 1.25rem;
    color: white;
    margin-bottom: 8px;
}

.post-subscribe .subscribe-form {
    width: 100%;
    max-width: 420px;
    flex-wrap: wrap;
    justify-content: center;
}

.post-subscribe .subscribe-form input {
    flex: 1;
    min-width: 200px;
}

/* ===== Share Buttons ===== */
.post-share {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.post-share-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.post-share-buttons {
    display: flex;
    gap: 8px;
}

.share-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border-color: var(--color-text-muted);
}

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

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

.share-copy:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* ===== Series Navigation ===== */
.series-nav {
    margin-top: 48px;
    padding: 24px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.series-nav-header {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    text-align: center;
}

.series-nav-links {
    display: flex;
    justify-content: space-between;
    gap: 24px;
}

.series-nav-prev,
.series-nav-next {
    flex: 1;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text);
    transition: all var(--transition-fast);
    display: block;
}

.series-nav-prev:hover,
.series-nav-next:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.series-nav-next {
    text-align: right;
}

/* ===== Active nav state ===== */
.blog-nav a.active {
    color: var(--color-primary);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .blog-header .blog-nav {
        display: none;
    }

    .blog-hero {
        padding: 48px 0;
    }

    .blog-hero h1 {
        font-size: 2rem;
    }

    .posts-grid {
        grid-template-columns: 1fr;
    }

    .post-title {
        font-size: 1.75rem;
    }

    .post-content {
        font-size: 1rem;
    }

    .subscribe-card {
        flex-direction: column;
        text-align: center;
        padding: 32px 24px;
    }

    .subscribe-form {
        width: 100%;
        flex-direction: column;
    }

    .subscribe-form input {
        min-width: 100%;
    }

    .series-nav-links {
        flex-direction: column;
        gap: 12px;
    }

    .series-nav-next {
        text-align: left;
    }
}