/* =====================================================
   BLOG HUB - صفحه اصلی وبلاگ (/blog)
   الهام‌گرفته از single-post.css و هماهنگ با سیستم کارت‌ها
   ===================================================== */

.erc-blog-hub {
    background: var(--bg-primary);
    padding-block: var(--space-7);
}

.erc-blog-hub__container {
    max-width: 1240px;
    margin: 0 auto;
    padding-inline: var(--space-4);
}

/* =====================================================
   HERO
   ===================================================== */

.erc-blog-hub__hero {
    margin-bottom: var(--space-7);
    padding: var(--space-7);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-md);
}

.erc-blog-hub__hero-inner {
    max-width: 860px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items:center;
    justify-content: start;
    gap: var(--space-4);
}

.erc-blog-hub__section--cta {
    display: flex;
    flex-direction: column;
    align-items:center;
    justify-content: start;
    gap: var(--space-4);
}

.erc-blog-hub__kicker {
    display: inline-block;
    margin-bottom: var(--space-3);
    color: var(--brand-blue);
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.erc-blog-hub__title {
    font-size: clamp(1.9rem, 3vw, 3rem);
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.erc-blog-hub__subtitle {
    font-size: 1.08rem;
    line-height: 1.9;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto;
}

/* =====================================================
   SECTIONS
   ===================================================== */

.erc-blog-hub__section {
    margin-top: var(--space-7);
    margin-bottom: var(--space-6);
    
}

.erc-blog-hub__section-head {
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--border-subtle);
}

.erc-blog-hub__section-head.section-head_featured {
    padding-right: var(--space-4);
    border-right: 4px solid var(--success);
}

.erc-blog-hub__section-head.section-head_latest {
    padding-right: var(--space-4);
    border-right: 4px solid var(--warning);
}

.erc-blog-hub__section-head.section-head_fuel {
    padding-right: var(--space-4);
    border-right: 4px solid var(--brand-red);
}

.erc-blog-hub__section-head.section-head_oil {
    padding-right: var(--space-4);
    border-right: 4px solid var(--brand-blue);
}

.erc-blog-hub__section-title {
    font-size: clamp(1.35rem, 2vw, 2rem);
    line-height: 1.35;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.erc-blog-hub__section-desc {
    font-size: 0.98rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* =====================================================
   CONTENT BLOCK WRAPPER
   ===================================================== */

.erc-content-block {
    width: 100%;
}

/* =====================================================
   CTA BOX
   ===================================================== */

.erc-blog-hub__cta-box {
    background: var(--bg-card);
    padding: var(--space-7);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-sm);
}

.erc-blog-hub__cta-title {
    font-size: clamp(1.3rem, 2vw, 1.8rem);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    line-height: 1.4;
}

.erc-blog-hub__cta-text {
    font-size: 1.03rem;
    line-height: 1.85;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.erc-blog-hub__cta-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.erc-blog-hub__cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.2rem;
    border-radius: var(--radius-lg);
    border: 2px solid var(--text-primary);
    color: var(--text-primary);
    background: transparent;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
}

.erc-blog-hub__cta-btn:hover {
    border-color: var(--brand-blue);
    color: var(--brand-blue);
    background: rgba(255, 255, 255, 0.04);
}

/* =====================================================
   INHERITED BLOG CARD / GRID SUPPORT
   این بخش‌ها با blog-grid.css و blog-card.css هماهنگ‌اند
   ===================================================== */

.erc-blog-hub .entries {
    margin: 0;
}

/* اگر بخواهی مقاله‌ها حتماً مطابق grid دو ستونه theme نمایش داده شوند */
.blog .entries,
.archive .entries,
.search .entries {
    display: grid;
}

/* Helper for card system consistency */
.erc-blog-hub article {
    min-width: 0;
}

/* =====================================================
   LINKS
   ===================================================== */

.erc-blog-hub a {
    color: var(--brand-blue);
    text-decoration: none;
}

.erc-blog-hub a:hover {
    color: var(--brand-blue-hover);
}

/* =====================================================
   TYPOGRAPHY HELPERS
   ===================================================== */

.erc-blog-hub p {
    margin: 0;
}

.erc-blog-hub h1,
.erc-blog-hub h2,
.erc-blog-hub h3 {
    margin-top: 0;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */

@media (max-width: 768px) {
    .erc-blog-hub {
        padding-block: var(--space-6);
    }

    .erc-blog-hub__container {
        padding-inline: var(--space-4);
    }

    .erc-blog-hub__hero {
        padding: var(--space-6);
        margin-bottom: var(--space-6);
    }

    .erc-blog-hub__section {
        margin-bottom: var(--space-6);
    }

    .erc-blog-hub__cta-box {
        padding: var(--space-6);
    }

    .erc-blog-hub__cta-actions {
        gap: var(--space-2);
    }

    .erc-blog-hub__cta-btn {
        width: 100%;
        max-width: 260px;
    }
}

@media (max-width: 480px) {
    .erc-blog-hub__title {
        font-size: clamp(1.55rem, 6vw, 2.2rem);
    }

    .erc-blog-hub__subtitle {
        font-size: 0.98rem;
    }

    .erc-blog-hub__section-title {
        font-size: 1.35rem;
    }

    .erc-blog-hub__cta-text {
        font-size: 0.95rem;
    }
}