/* ==========================================================================
   Catalog Header
   ========================================================================== */

.gr-catalog-header {
    background: var(--gr-dark-1);
    border-bottom: 1px solid var(--gr-dark-border);
    padding: 2.5rem 0;
}

.gr-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--gr-font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--gr-dark-text-3);
    margin-bottom: 2rem;
}

.gr-breadcrumb a {
    color: var(--gr-dark-text-3);
    text-decoration: none;
    transition: color var(--gr-dur) var(--gr-ease);
}

.gr-breadcrumb a:hover {
    color: var(--gr-accent);
}

.gr-breadcrumb-sep {
    opacity: 0.4;
}

.gr-catalog-header-body {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.gr-catalog-header-identity {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
}

.gr-catalog-header-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--gr-radius-lg);
    background: var(--gr-accent-dim);
    border: 1px solid var(--gr-accent-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--gr-accent);
    flex-shrink: 0;
}

.gr-catalog-header-eyebrow {
    font-family: var(--gr-font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gr-accent);
    margin-bottom: 0.35rem;
}

.gr-catalog-header-title {
    font-family: var(--gr-font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gr-dark-text-1);
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.gr-catalog-header-desc {
    font-size: 0.925rem;
    color: var(--gr-dark-text-2);
    line-height: 1.65;
    max-width: 640px;
}

/* Meta grid */
.gr-catalog-meta-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gr-dark-border);
}

.gr-catalog-meta-item dt {
    font-family: var(--gr-font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gr-dark-text-3);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.gr-catalog-meta-item dd {
    font-size: 0.875rem;
    color: var(--gr-dark-text-2);
}

.gr-catalog-meta-item dd a {
    color: var(--gr-accent);
    text-decoration: none;
}

.gr-catalog-meta-item dd a:hover {
    color: var(--gr-accent-dark);
}

.gr-catalog-meta-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

@media (max-width: 768px) {
    .gr-catalog-header-title {
        font-size: 1.4rem;
    }

    .gr-catalog-meta-grid {
        gap: 1rem 1.5rem;
    }
}