/* ============================================
   Blog index — LingoChat
   ============================================ */

/* Hero */
.blog-hero {
    background: var(--color-bg-alt);
    padding: var(--space-12) 0 var(--space-8);
}

.blog-hero__title {
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 700;
    margin: var(--space-3) 0 var(--space-2);
    color: var(--color-text);
}

.blog-hero__sub {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    max-width: 580px;
    margin-bottom: var(--space-6);
}

/* Cluster nav pills */
.cluster-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.cluster-pill {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 600;
    text-decoration: none;
    transition: opacity .15s, transform .15s;
    border: 1.5px solid transparent;
}

.cluster-pill:hover { opacity: .8; transform: translateY(-1px); text-decoration: none; }

.cluster-pill--emerald { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.cluster-pill--blue    { background: #eff6ff; color: #1e40af; border-color: #bfdbfe; }
.cluster-pill--violet  { background: #f5f3ff; color: #5b21b6; border-color: #ddd6fe; }
.cluster-pill--orange  { background: #fff7ed; color: #9a3412; border-color: #fed7aa; }
.cluster-pill--red     { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.cluster-pill--teal    { background: #f0fdfa; color: #134e4a; border-color: #99f6e4; }
.cluster-pill--gray    { background: #f9fafb; color: #374151; border-color: #e5e7eb; }

/* Cluster section */
.cluster-section {
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
}

.cluster-section:last-of-type { border-bottom: none; }

/* Cluster header */
.cluster-header {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    margin-bottom: 1.5rem;
}

.cluster-header__icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cluster-header__icon--emerald { background: #ecfdf5; color: #059669; }
.cluster-header__icon--blue    { background: #eff6ff; color: #2563eb; }
.cluster-header__icon--violet  { background: #f5f3ff; color: #7c3aed; }
.cluster-header__icon--orange  { background: #fff7ed; color: #ea580c; }
.cluster-header__icon--red     { background: #fef2f2; color: #dc2626; }
.cluster-header__icon--teal    { background: #f0fdfa; color: #0d9488; }
.cluster-header__icon--gray    { background: #f9fafb; color: #6b7280; }

.cluster-header__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.25rem;
    scroll-margin-top: 80px;
}

.cluster-header__desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.5;
    margin: 0;
}

/* Cluster grid */
.cluster-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 900px) { .cluster-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cluster-grid { grid-template-columns: 1fr; } }

/* Article card */
.article-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color .15s, transform .15s, box-shadow .15s;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Featured card — spans 2 columns */
.article-card--featured {
    grid-column: span 2;
    flex-direction: row;
}

@media (max-width: 900px) {
    .article-card--featured {
        grid-column: span 2;
        flex-direction: column;
    }
}

@media (max-width: 600px) {
    .article-card--featured {
        grid-column: span 1;
        flex-direction: column;
    }
}

.article-card__img-link {
    display: block;
    flex-shrink: 0;
    width: 240px;
    min-height: 160px;
}

.article-card--featured .article-card__img-link { width: 240px; }

@media (max-width: 900px) {
    .article-card--featured .article-card__img-link { width: 100%; min-height: 180px; }
}

.article-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.article-card__body {
    padding: 1.25rem 1.375rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-card__category {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
}

.article-card__title {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-text);
    text-decoration: none;
    margin-bottom: 0.5rem;
}

.article-card--featured .article-card__title {
    font-size: 1.125rem;
}

.article-card__title:hover { color: var(--color-primary-dark); text-decoration: none; }

.article-card__excerpt {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.55;
    flex: 1;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card__meta {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: auto;
}

/* Planned articles compact list */
.cluster-planned {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
}

.cluster-planned__label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
    margin-bottom: 0.625rem;
}

.cluster-planned__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.cluster-planned__item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.cluster-planned__dot {
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-border);
}