/* ===================================
   COMPONENT: Blog Page
   BEM Block: blog-hero, blog-card, blog-filters
   Purpose: Blog post listing page — card grid, category filters, hero section
   Dependencies: main.css for CSS variables
   =================================== */

.blog-hero {
    margin-bottom: var(--space-12);
    display: grid;
    gap: var(--space-4);
}

.blog-hero__eyebrow-icon,
.blog-card__meta-icon {
    display: inline-block;
    vertical-align: middle;
    margin-right: var(--space-1);
    flex-shrink: 0;
}

.blog-hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    background: var(--color-blue-10);
    color: var(--color-blue);
    font-weight: 600;
    width: fit-content;
}

[data-theme="dark"] .blog-hero__eyebrow {
    background: var(--color-blue-light-12);
    color: var(--color-link-on-dark);
}

.blog-hero__title {
    font-size: var(--text-6xl);
    line-height: 1.1;
    font-weight: 800;
    color: var(--color-text-primary);
    text-align: center;
}

[data-theme="dark"] .blog-hero__title {
    color: var(--color-text-on-dark);
}

.blog-hero__description {
    max-width: 780px;
    margin: 0 auto;
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    text-align: center;
}

[data-theme="dark"] .blog-hero__description {
    color: var(--color-text-on-dark);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.blog-card {
    background: var(--white-60);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: 0 4px 16px var(--black-06);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--color-blue-10);
    border-top: 3px solid var(--color-blue);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px var(--black-12);
}

/* Data-attribute selectors apply category accent colours without extra BEM modifier classes.
   Keeps HTML semantic (category stored in data-category attribute) and CSS self-documenting. */
.blog-card[data-category="press-release"],
.blog-card[data-category="announcement"] {
    border-top-color: var(--color-orange);
}

[data-theme="dark"] .blog-card {
    background: var(--color-neutral-900-96);
    box-shadow: 0 12px 32px var(--black-30);
    border-color: var(--color-blue-light-18);
    border-top-color: var(--color-blue-light);
}

[data-theme="dark"] .blog-card:hover {
    box-shadow: 0 20px 56px var(--black-50);
}

[data-theme="dark"] .blog-card[data-category="press-release"],
[data-theme="dark"] .blog-card[data-category="announcement"] {
    border-top-color: var(--color-orange);
}

.blog-card__badge {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    gap: var(--space-2);
    background: var(--color-blue-12);
    color: var(--color-blue);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-sm);
    margin-bottom: var(--space-3);
}

[data-theme="dark"] .blog-card__badge {
    background: var(--color-blue-20);
    color: var(--color-blue-light);
}

.blog-card__title {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

[data-theme="dark"] .blog-card__title {
    color: var(--color-text-on-dark);
}

.blog-card__title-link {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.blog-card__title-link:hover {
    color: var(--color-blue);
}

[data-theme="dark"] .blog-card__title-link:hover {
    color: var(--color-blue-light);
}

.blog-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
}

[data-theme="dark"] .blog-card__meta {
    color: var(--color-text-primary);
}

.blog-card__summary {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

/* Standalone secondary link sitting above the actions divider */
.blog-card > .blog-card__link {
    margin-bottom: var(--space-4);
}

[data-theme="dark"] .blog-card__summary {
    color: var(--color-text-on-dark);
}

/* margin-top: auto in a flex column pushes .blog-card__actions to the card bottom,
   ensuring action rows align across cards of different content heights. */
.blog-card__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    align-items: center;
    margin-top: auto;
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-blue-10);
}

.blog-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-blue);
    font-weight: 600;
    text-decoration: none;
}

.blog-card__link:hover {
    text-decoration: underline;
}

[data-theme="dark"] .blog-card__link {
    color: var(--color-link-on-dark);
}

[data-theme="dark"] .blog-card__actions {
    border-top-color: var(--color-blue-light-18);
}

/* --- Badge colour variants --- */

.blog-card__badge--press-release {
    background: var(--color-orange-15);
    color: var(--color-orange-dark);
}

[data-theme="dark"] .blog-card__badge--press-release {
    background: var(--color-orange-20);
    color: var(--color-orange);
}

.blog-card__badge--announcement {
    background: var(--color-orange-10);
    color: var(--color-orange-dark);
}

[data-theme="dark"] .blog-card__badge--announcement {
    background: var(--color-orange-15);
    color: var(--color-orange);
}

/* --- Blog filter buttons --- */

.blog-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
}

.blog-filter-btn {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-blue-15);
    background: transparent;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.blog-filter-btn:hover {
    background: var(--color-blue-10);
    color: var(--color-blue);
    border-color: var(--color-blue);
}

.blog-filter-btn--active {
    background: var(--color-blue-12);
    color: var(--color-blue);
    border-color: var(--color-blue);
}

[data-theme="dark"] .blog-filter-btn {
    border-color: var(--color-blue-light-18);
    color: var(--color-text-on-dark);
}

[data-theme="dark"] .blog-filter-btn:hover {
    background: var(--color-blue-light-12);
    color: var(--color-blue-light);
    border-color: var(--color-blue-light);
}

[data-theme="dark"] .blog-filter-btn--active {
    background: var(--color-blue-light-12);
    color: var(--color-blue-light);
    border-color: var(--color-blue-light);
}

/* --- Hidden state for filtered cards --- */

.blog-card--hidden {
    display: none;
}

@media (max-width: 768px) {
    .blog-page {
        padding: var(--space-20) var(--space-4) var(--space-12);
    }

    .blog-hero__title {
        font-size: var(--text-4xl);
    }

    .blog-card {
        padding: var(--space-5);
    }

    .blog-filters {
        gap: var(--space-2);
    }
}

@media (max-width: 380px) {
    .blog-card {
        padding: var(--space-4);
    }
}