/* ==========================================================================
   Blog — Listing + Article Detail
   ========================================================================== */

/* === BLOG LISTING === */
.blog-listing {
    padding-top: calc(80px + var(--spacing-xl));
    min-height: 80vh;
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}
.blog-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: var(--text-body-lg);
    padding: var(--spacing-2xl) 0;
}
.blog-card {
    display: block;
    text-decoration: none;
    color: inherit;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}
.blog-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.blog-card-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}
.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--text-caption);
    color: var(--color-text-tertiary);
}
.blog-card-separator { opacity: 0.5; }
.blog-card-title {
    font-size: var(--text-h3);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin: 0;
}
.blog-card-excerpt {
    font-size: var(--text-body);
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.blog-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--text-small);
    font-weight: 500;
    color: #4CAF50;
    margin-top: var(--spacing-xs);
    transition: gap var(--transition-fast);
}
.blog-card:hover .blog-card-link { gap: 10px; }

/* === ARTICLE DETAIL === */
.blog-article {
    padding-top: calc(80px + var(--spacing-lg));
    padding-bottom: var(--spacing-2xl);
}
.blog-article-header {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}
.blog-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-text-tertiary);
    text-decoration: none;
    font-size: var(--text-small);
    font-weight: 500;
    transition: color var(--transition-fast);
    margin-bottom: var(--spacing-md);
}
.blog-back-link:hover { color: #4CAF50; }
.blog-article-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--text-small);
    color: var(--color-text-tertiary);
    flex-wrap: wrap;
}
.blog-article-separator { opacity: 0.5; }

/* === ARTICLE CONTENT === */
.blog-article-content {
    max-width: 800px;
    margin: 0 auto;
}
.blog-article-content h1 {
    font-size: clamp(32px, 5vw, 44px);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}
.blog-article-content h2 {
    font-size: clamp(24px, 4vw, 32px);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}
.blog-article-content h2:first-child {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}
.blog-article-content h3 {
    font-size: clamp(20px, 3vw, 24px);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}
.blog-article-content h4 {
    font-size: var(--text-body-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}
.blog-article-content p {
    font-size: var(--text-body);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}
.blog-article-content a {
    color: #4CAF50;
    text-decoration: underline;
    text-decoration-color: rgba(76, 175, 80, 0.3);
    text-underline-offset: 3px;
    transition: text-decoration-color var(--transition-fast);
}
.blog-article-content a:hover {
    text-decoration-color: #4CAF50;
}
.blog-article-content a.btn {
    color: var(--color-text-primary);
    text-decoration: none;
}
.blog-article-content ul,
.blog-article-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    color: var(--color-text-secondary);
}
.blog-article-content li {
    font-size: var(--text-body);
    line-height: 1.8;
    margin-bottom: 8px;
}
.blog-article-content li strong {
    color: var(--color-text-primary);
}

/* Callout */
.blog-callout {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 4px solid #4CAF50;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}
.blog-callout p { margin-bottom: 8px; }
.blog-callout p:last-child { margin-bottom: 0; }
.blog-callout-title {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--text-body-lg);
    margin-bottom: var(--spacing-xs);
}

/* Table of Contents */
.blog-toc {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}
.blog-toc-title {
    font-size: var(--text-body-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}
.blog-toc ol {
    margin: 0;
    padding-left: var(--spacing-md);
}
.blog-toc li {
    font-size: var(--text-small);
    line-height: 1.6;
    margin-bottom: 6px;
    color: var(--color-text-secondary);
}
.blog-toc a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}
.blog-toc a:hover { color: #4CAF50; }

/* Tables */
.blog-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}
.blog-article-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-small);
    white-space: nowrap;
}
.blog-article-content thead th {
    background: rgba(76, 175, 80, 0.15);
    color: var(--color-text-primary);
    font-weight: 600;
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
}
.blog-article-content tbody td {
    padding: 10px 16px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    white-space: normal;
    min-width: 100px;
}
.blog-article-content tbody tr:last-child td { border-bottom: none; }
.blog-article-content tbody tr:hover { background: rgba(255, 255, 255, 0.03); }
.blog-article-content tbody td:first-child {
    font-weight: 500;
    color: var(--color-text-primary);
    white-space: nowrap;
}

/* Code blocks */
.blog-article-content code {
    background: rgba(76, 175, 80, 0.1);
    color: #66BB6A;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
}
.blog-article-content pre {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
}
.blog-article-content pre code {
    background: none;
    padding: 0;
    color: var(--color-text-secondary);
    font-size: var(--text-small);
    line-height: 1.6;
}

/* FAQ */
.blog-faq { margin-top: var(--spacing-xl); }
.blog-faq-item {
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
}
.blog-faq-item:last-child { border-bottom: none; }
.blog-faq-question {
    font-size: var(--text-body-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}
.blog-faq-answer {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* CTA */
.blog-cta {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    margin-top: var(--spacing-xl);
}
.blog-cta h2 {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}
.blog-cta p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}
.blog-cta .btn { display: inline-flex; }

/* Highlight box */
.blog-verdict {
    background: linear-gradient(135deg, rgba(46, 125, 50, 0.12) 0%, rgba(76, 175, 80, 0.12) 100%);
    border: 1px solid rgba(76, 175, 80, 0.25);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}
.blog-verdict p { margin-bottom: 8px; }
.blog-verdict p:last-child { margin-bottom: 0; }

/* Article images */
.blog-article-content img:not(.blog-store-badges img) {
    display: block;
    margin: var(--spacing-lg) auto;
    max-width: 100%;
    max-height: 600px;
    width: auto;
    height: auto;
    border-radius: 12px;
    object-fit: contain;
}

/* Formula box */
.blog-formula {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: var(--text-small);
    color: #66BB6A;
    line-height: 1.8;
    overflow-x: auto;
}

/* Store badges in CTA */
.blog-store-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}
.blog-store-badges img {
    height: 48px;
    width: auto;
    transition: opacity var(--transition-fast);
}
.blog-store-badges a:hover img { opacity: 0.8; }

/* Active nav highlight */
.nav-link-active { color: #4CAF50 !important; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .blog-grid { grid-template-columns: 1fr; }
    .blog-card { padding: var(--spacing-md); }
    .blog-card-title { font-size: 22px; }
    .blog-article-content { padding: 0 var(--spacing-xs); }
    .blog-cta { padding: var(--spacing-lg); }
    .blog-article-content table { font-size: var(--text-caption); }
    .blog-article-content thead th,
    .blog-article-content tbody td { padding: 8px 12px; }
}
@media (max-width: 520px) {
    .blog-store-badges { flex-direction: column; }
}
@media (max-width: 480px) {
    .blog-article-meta { font-size: var(--text-caption); }
    .blog-card-title { font-size: 20px; }
    .blog-verdict, .blog-callout { padding: var(--spacing-sm); }
    .blog-toc { padding: var(--spacing-sm) var(--spacing-md); }
}