/* ==========================================================================
   INSIGHTS HUB — Zeta IT Consulting
   Page-specific styles for the Insights Hub listing page and single post page.
   Filter bar, post card grid, pagination, search overlay, prose typography,
   badges, social sharing, and responsive layout.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CATEGORY COLORS (service-aligned)
   -------------------------------------------------------------------------- */

:root {
    --color-cat-insights: #6366f1;
    --color-cat-build:    #3b82f6;
    --color-cat-connect:  #06b6d4;
    --color-cat-automate: #8b5cf6;
    --color-cat-analyze:  #f59e0b;
    --color-cat-innovate: #ec4899;
}


/* --------------------------------------------------------------------------
   2. FILTER BAR
   -------------------------------------------------------------------------- */

.insights-filters-section {
    padding-block: var(--space-4) var(--space-8);
}

.insights-filters {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.insights-filter-group {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.insights-filter-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    background: transparent;
    border: 1px solid var(--color-border);
    text-decoration: none;
    white-space: nowrap;
    transition:
        color var(--duration-fast) var(--ease-out),
        background-color var(--duration-fast) var(--ease-out),
        border-color var(--duration-fast) var(--ease-out);
}

.insights-filter-pill:hover {
    color: var(--color-text);
    border-color: var(--color-accent-hover);
}

.insights-filter-pill.is-active {
    color: #fff;
    background: var(--gradient-accent);
    border-color: transparent;
}

.insights-filter-pill-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
}

.insights-filter-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 var(--space-1);
    font-size: 0.6875rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-full);
    background: var(--color-bg-surface);
    color: var(--color-text-faint);
}

.insights-filter-pill.is-active .insights-filter-count {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}


/* --------------------------------------------------------------------------
   3. SEARCH INPUT & OVERLAY
   -------------------------------------------------------------------------- */

.insights-search-wrapper {
    position: relative;
}

.insights-search-input {
    display: block;
    width: 100%;
    max-width: 20rem;
    padding: var(--space-2) var(--space-4);
    padding-left: 2.25rem;
    font-size: var(--text-sm);
    color: var(--color-text);
    background-color: var(--color-bg-surface);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%23636878' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='7' cy='7' r='5'/%3E%3Cpath d='m11 11 3 3'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 0.75rem center;
    background-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition:
        border-color var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out);
}

.insights-search-input::placeholder {
    color: var(--color-text-faint);
}

.insights-search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Search results overlay */
.insights-search-results {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    right: 0;
    min-width: 20rem;
    max-width: 28rem;
    max-height: 24rem;
    overflow-y: auto;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-overlay);
    animation: insightsFadeSlideDown var(--duration-normal) var(--ease-out) both;
}

.insights-search-results[hidden] {
    display: none;
}

.insights-search-result-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border-subtle);
    transition: background-color var(--duration-fast) var(--ease-out);
}

.insights-search-result-item:last-child {
    border-bottom: none;
}

.insights-search-result-item:hover {
    background: var(--color-bg-hover);
}

.insights-search-result-title {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: #fff;
    margin-bottom: var(--space-1);
}

.insights-search-result-excerpt {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    line-height: var(--leading-normal);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.insights-search-empty {
    padding: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-align: center;
}

@keyframes insightsFadeSlideDown {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}


/* --------------------------------------------------------------------------
   4. POST CARD GRID
   -------------------------------------------------------------------------- */

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
    gap: var(--space-6);
}

.insights-grid-related {
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr));
}


/* --------------------------------------------------------------------------
   5. POST CARD
   -------------------------------------------------------------------------- */

.insights-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition:
        border-color var(--duration-normal) var(--ease-out),
        box-shadow var(--duration-normal) var(--ease-out),
        transform var(--duration-normal) var(--ease-out);
}

.insights-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.insights-card-link {
    display: flex;
    flex-direction: column;
    flex: 1;
    text-decoration: none;
    color: inherit;
}

.insights-card-image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-bg-surface);
}

.insights-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.insights-card:hover .insights-card-image img {
    transform: scale(1.03);
}

.insights-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: var(--space-5);
}

.insights-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.insights-card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: #fff;
    line-height: var(--leading-snug);
    margin-bottom: var(--space-2);
}

.insights-card-excerpt {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: var(--leading-normal);
    margin-bottom: var(--space-4);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.insights-card-footer {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    margin-top: auto;
}

.insights-card-footer time + .insights-reading-time::before {
    content: '\00b7';
    margin-right: var(--space-2);
}


/* --------------------------------------------------------------------------
   6. CATEGORY BADGE
   -------------------------------------------------------------------------- */

.insights-category-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    border-radius: var(--radius-sm);
    color: #fff;
    background: var(--color-cat-insights);
}

.insights-category-badge[data-category="insights"]  { background: var(--color-cat-insights); }
.insights-category-badge[data-category="build"]     { background: var(--color-cat-build); }
.insights-category-badge[data-category="connect"]   { background: var(--color-cat-connect); }
.insights-category-badge[data-category="automate"]  { background: var(--color-cat-automate); }
.insights-category-badge[data-category="analyze"]   { background: var(--color-cat-analyze); }
.insights-category-badge[data-category="innovate"]  { background: var(--color-cat-innovate); }


/* --------------------------------------------------------------------------
   7. CONTENT TYPE BADGE (outline style)
   -------------------------------------------------------------------------- */

.insights-type-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: var(--tracking-wide);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    background: transparent;
}


/* --------------------------------------------------------------------------
   8. PAGINATION
   -------------------------------------------------------------------------- */

.insights-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-10);
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    height: 2.25rem;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition:
        color var(--duration-fast) var(--ease-out),
        background-color var(--duration-fast) var(--ease-out),
        border-color var(--duration-fast) var(--ease-out);
}

.pagination-link:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
    border-color: var(--color-accent-hover);
}

.pagination-link.is-active {
    color: #fff;
    background: var(--gradient-accent);
    border-color: transparent;
}

.pagination-prev,
.pagination-next {
    min-width: auto;
    padding: var(--space-1) var(--space-4);
}


/* --------------------------------------------------------------------------
   9. EMPTY STATE
   -------------------------------------------------------------------------- */

.insights-empty {
    text-align: center;
    padding: var(--space-16) var(--space-4);
}

.insights-empty h2 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-3);
}

.insights-empty p {
    font-size: var(--text-base);
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
    max-width: 28rem;
    margin-inline: auto;
}


/* --------------------------------------------------------------------------
   10. BACK LINK
   -------------------------------------------------------------------------- */

.insights-back-section {
    padding-block: var(--space-6) 0;
}

.insights-back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

.insights-back-link:hover {
    color: var(--color-accent-hover);
}


/* --------------------------------------------------------------------------
   11. POST HEADER
   -------------------------------------------------------------------------- */

.insights-post-header {
    padding-block: var(--space-8) var(--space-6);
}

.insights-post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.insights-post-title {
    font-size: var(--text-5xl);
    font-weight: 700;
    line-height: var(--leading-tight);
    margin-bottom: var(--space-4);
    max-width: 48rem;
}

.insights-post-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

.insights-post-info .insights-reading-time::before {
    content: '\00b7';
    margin-right: var(--space-3);
}

.insights-post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.insights-tag {
    display: inline-flex;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-bg-surface);
    border-radius: var(--radius-full);
}


/* --------------------------------------------------------------------------
   12. POST FEATURED IMAGE
   -------------------------------------------------------------------------- */

.insights-post-image {
    margin-bottom: var(--space-8);
}

.insights-post-image img {
    width: 100%;
    max-width: 60rem;
    margin-inline: auto;
    border-radius: var(--radius-lg);
    aspect-ratio: 16 / 9;
    object-fit: cover;
}


/* --------------------------------------------------------------------------
   13. PROSE — Article typography for rendered Markdown
   -------------------------------------------------------------------------- */

.insights-content.prose {
    max-width: 42rem;
    font-size: var(--text-lg);
    line-height: var(--leading-loose);
    color: var(--color-text);
}

/* Headings */
.insights-content.prose h2 {
    font-size: var(--text-3xl);
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
}

.insights-content.prose h3 {
    font-size: var(--text-2xl);
    margin-top: var(--space-10);
    margin-bottom: var(--space-3);
}

.insights-content.prose h4 {
    font-size: var(--text-xl);
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

/* Paragraphs */
.insights-content.prose p {
    margin-bottom: var(--space-6);
    font-size: inherit;
    color: inherit;
    line-height: inherit;
}

/* Links */
.insights-content.prose a {
    color: var(--color-accent-hover);
    text-decoration: underline;
    text-underline-offset: 0.15em;
    transition: color var(--duration-fast) var(--ease-out);
}

.insights-content.prose a:hover {
    color: #fff;
}

/* Lists */
.insights-content.prose ul,
.insights-content.prose ol {
    margin-bottom: var(--space-6);
    padding-left: var(--space-6);
}

.insights-content.prose ul {
    list-style: none;
}

.insights-content.prose ul li {
    position: relative;
    padding-left: var(--space-4);
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
}

.insights-content.prose ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.65em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
}

.insights-content.prose ol {
    list-style: decimal;
}

.insights-content.prose ol li {
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
    padding-left: var(--space-2);
}

.insights-content.prose ol li::marker {
    color: var(--color-accent);
    font-weight: 600;
}

/* Blockquote */
.insights-content.prose blockquote {
    margin-block: var(--space-6);
    padding: var(--space-4) var(--space-6);
    border-left: 3px solid var(--color-accent);
    background: var(--color-bg-elevated);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--color-text-muted);
}

.insights-content.prose blockquote p {
    margin-bottom: 0;
}

/* Inline code */
.insights-content.prose code {
    padding: 0.15em 0.4em;
    font-size: 0.875em;
    font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', monospace;
    background: var(--color-bg-surface);
    border-radius: var(--radius-sm);
    color: var(--color-accent-hover);
}

/* Code blocks */
.insights-content.prose pre {
    margin-block: var(--space-6);
    padding: var(--space-5);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.insights-content.prose pre code {
    padding: 0;
    background: none;
    border-radius: 0;
    font-size: var(--text-sm);
    color: var(--color-text);
    line-height: var(--leading-normal);
}

/* Images */
.insights-content.prose img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin-block: var(--space-6);
}

/* Image caption (em immediately after img) */
.insights-content.prose img + em,
.insights-content.prose p > img + br + em {
    display: block;
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-faint);
    margin-top: calc(-1 * var(--space-4));
    margin-bottom: var(--space-6);
}

/* Strong text */
.insights-content.prose strong {
    color: #fff;
    font-weight: 600;
}

/* Horizontal rule */
.insights-content.prose hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin-block: var(--space-10);
}

/* Tables (if rendered) */
.insights-content.prose table {
    width: 100%;
    margin-block: var(--space-6);
    border-collapse: collapse;
    font-size: var(--text-base);
}

.insights-content.prose th,
.insights-content.prose td {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    text-align: left;
}

.insights-content.prose th {
    background: var(--color-bg-surface);
    font-weight: 600;
    color: #fff;
}

.insights-content.prose td {
    color: var(--color-text-muted);
}


/* --------------------------------------------------------------------------
   14. SOCIAL SHARING
   -------------------------------------------------------------------------- */

.insights-sharing {
    padding-block: var(--space-8);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.insights-sharing .container {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.insights-sharing-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-muted);
}

.insights-sharing-links {
    display: flex;
    gap: var(--space-2);
}

.insights-share-link {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    cursor: pointer;
    transition:
        color var(--duration-fast) var(--ease-out),
        background-color var(--duration-fast) var(--ease-out),
        border-color var(--duration-fast) var(--ease-out);
}

.insights-share-link:hover {
    color: #fff;
    background: var(--color-bg-hover);
    border-color: var(--color-accent-hover);
}

.insights-copy-link.is-copied {
    color: var(--color-success);
    border-color: var(--color-success);
}


/* --------------------------------------------------------------------------
   15. CTA SECTION (listing & post)
   -------------------------------------------------------------------------- */

.insights-cta-section {
    background: var(--color-bg-elevated);
}

.insights-cta {
    text-align: center;
    max-width: 36rem;
    margin: 0 auto;
}

.insights-cta h2 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-4);
}

.insights-cta p {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
    line-height: var(--leading-normal);
}

.insights-post-cta {
    padding-block: var(--space-12);
}

.insights-post-cta .insights-cta {
    padding: var(--space-10);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}


/* --------------------------------------------------------------------------
   16. RELATED POSTS
   -------------------------------------------------------------------------- */

.insights-related-section {
    border-top: 1px solid var(--color-border);
}

.insights-related-heading {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-8);
}


/* --------------------------------------------------------------------------
   17. STAGGERED CARD ENTRANCE
   -------------------------------------------------------------------------- */

@keyframes insightsCardIn {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.insights-grid .insights-card:nth-child(1)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 0ms; }
.insights-grid .insights-card:nth-child(2)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 80ms; }
.insights-grid .insights-card:nth-child(3)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 160ms; }
.insights-grid .insights-card:nth-child(4)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 240ms; }
.insights-grid .insights-card:nth-child(5)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 320ms; }
.insights-grid .insights-card:nth-child(6)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 400ms; }
.insights-grid .insights-card:nth-child(7)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 480ms; }
.insights-grid .insights-card:nth-child(8)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 560ms; }
.insights-grid .insights-card:nth-child(9)  { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 640ms; }
.insights-grid .insights-card:nth-child(n+10) { animation: insightsCardIn var(--duration-slow) var(--ease-out) both; animation-delay: 700ms; }


/* --------------------------------------------------------------------------
   18. RESPONSIVE
   -------------------------------------------------------------------------- */

/* Mobile (< 640px) */
@media (max-width: 40em) {
    .insights-filter-group {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: var(--space-1);
    }

    .insights-filter-group::-webkit-scrollbar {
        display: none;
    }

    .insights-search-input {
        max-width: 100%;
    }

    .insights-search-results {
        max-width: 100%;
    }

    .insights-post-title {
        font-size: var(--text-4xl);
    }

    .insights-post-image img {
        border-radius: var(--radius-md);
    }

    .insights-sharing .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .insights-sharing-links {
        flex-wrap: wrap;
    }

    .insights-post-cta .insights-cta {
        padding: var(--space-6);
    }

    .insights-content.prose {
        font-size: var(--text-base);
    }

    .insights-content.prose h2 {
        font-size: var(--text-2xl);
        margin-top: var(--space-8);
    }

    .insights-content.prose h3 {
        font-size: var(--text-xl);
        margin-top: var(--space-6);
    }
}

/* Tablet (640–1024px) */
@media (min-width: 40em) and (max-width: 64em) {
    .insights-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .insights-grid-related {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop (> 1024px) */
@media (min-width: 64em) {
    .insights-filters {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
    }

    .insights-filters > :first-child {
        flex: 1;
    }

    .insights-search-wrapper {
        flex-shrink: 0;
    }

    .insights-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .insights-grid-related {
        grid-template-columns: repeat(3, 1fr);
    }
}


/* --------------------------------------------------------------------------
   19. REDUCED MOTION
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .insights-card {
        transition: none;
    }

    .insights-card:hover {
        transform: none;
    }

    .insights-card-image img {
        transition: none;
    }

    .insights-card:hover .insights-card-image img {
        transform: none;
    }

    .insights-grid .insights-card {
        animation: none;
    }

    .insights-search-results {
        animation: none;
    }

    .insights-filter-pill,
    .insights-share-link,
    .pagination-link {
        transition: none;
    }
}