/* ═══════════════════════════════════════════════════════════════
   learning-resources-hub.css — Hub page styles (category cards,
   recent updates, priority picks) — M3 redesign
   ═══════════════════════════════════════════════════════════════ */

/* ─── Category Cards Grid ──────────────────────────────────── */

.hub-categories-section {
    margin: var(--space-10, 40px) 0;
}

.hub-categories-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.hub-categories-section > p {
    color: var(--m3-on-surface-variant, #49454F);
    margin-top: var(--space-1, 4px);
    font-size: 0.9rem;
}

.hub-categories-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5, 20px);
    margin-top: var(--space-5, 20px);
}

.hub-category-card {
    display: flex;
    flex-direction: column;
    padding: var(--space-6, 24px) var(--space-8, 32px);
    background: var(--ds-bg-card, white);
    border: 1px solid transparent;
    border-top: 3px solid var(--color-aws-orange, #dc7600);
    border-radius: var(--radius-card, 16px);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
    box-shadow: var(--shadow-card);
}

.hub-category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
    border-top-color: var(--color-aws-orange-hover, #EC7211);
}

.hub-category-card:focus-visible {
    outline: 3px solid var(--color-aws-orange, #dc7600);
    outline-offset: 2px;
}

.hub-category-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3, 12px);
    margin-bottom: var(--space-3, 12px);
}

.hub-category-card-icon {
    font-size: 2rem;
    line-height: 1;
}

.hub-category-card-title-group {
    display: flex;
    flex-direction: column;
}

.hub-category-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0;
    color: var(--m3-on-surface, #1C1B1F);
}

.hub-category-card-count {
    font-size: 0.78rem;
    color: var(--m3-on-surface-variant, #49454F);
    margin-top: 2px;
}

.hub-category-card-desc {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-text-secondary, #6B7280);
    margin: 0 0 var(--space-3, 12px);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hub-category-card-link {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-aws-orange, #dc7600);
    align-self: flex-end;
    transition: transform 0.15s;
}

.hub-category-card:hover .hub-category-card-link {
    transform: translateX(3px);
}

/* ─── Recent Updates ───────────────────────────────────────── */

.hub-recent-updates {
    margin: var(--space-10, 40px) 0;
}

.hub-recent-updates h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.hub-updates-list {
    list-style: none;
    padding: 0;
    margin: var(--space-4, 16px) 0 0;
    background: var(--m3-surface-container, #F5F4F2);
    border-radius: var(--radius-card, 16px);
    overflow: hidden;
}

.hub-update-item {
    display: flex;
    gap: var(--space-4, 16px);
    padding: var(--space-5, 20px) var(--space-6, 24px);
    border-bottom: 1px solid var(--m3-surface-container-high, #EFEEEC);
    align-items: flex-start;
    transition: background 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.hub-update-item:last-child {
    border-bottom: none;
}

.hub-update-item:hover {
    background: rgba(220, 118, 0, 0.03);
}

.hub-update-date {
    flex-shrink: 0;
    font-size: 0.75rem;
    color: var(--color-text-tertiary, #6f7682);
    background: transparent;
    padding: 0;
    border-radius: 0;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    min-width: 80px;
    text-align: left;
    font-weight: 500;
}

.hub-update-content {
    flex: 1;
    min-width: 0;
}

.hub-update-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--m3-on-surface, #1C1B1F);
    margin: 0;
    line-height: 1.5;
}

.hub-update-categories {
    display: flex;
    gap: var(--space-2, 8px);
    margin-top: var(--space-2, 8px);
    flex-wrap: wrap;
}

.hub-update-cat-badge {
    font-size: 0.72rem;
    padding: 2px 10px;
    border-radius: var(--radius-badge, 8px);
    background: var(--m3-surface-container-high, #EFEEEC);
    color: var(--m3-on-surface-variant, #49454F);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.15s;
}

.hub-update-cat-badge:hover {
    background: var(--color-aws-orange, #dc7600);
    color: white;
}

/* ─── Priority Picks ───────────────────────────────────────── */

.hub-priority-picks {
    margin: var(--space-10, 40px) 0;
}

.hub-priority-picks h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.hub-priority-picks > p {
    color: var(--m3-on-surface-variant, #49454F);
    margin-top: var(--space-1, 4px);
    font-size: 0.9rem;
}

.hub-picks-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4, 16px);
    margin-top: var(--space-5, 20px);
}

.hub-pick-card {
    display: flex;
    gap: var(--space-3, 12px);
    padding: var(--space-5, 20px) var(--space-6, 24px);
    background: var(--ds-bg-card, white);
    border: 1px solid transparent;
    border-radius: var(--radius-card, 16px);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
    align-items: flex-start;
    box-shadow: var(--shadow-card);
}

.hub-pick-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--m3-outline, #CAC4D0);
}

.hub-pick-card:focus-visible {
    outline: 3px solid var(--color-aws-orange, #dc7600);
    outline-offset: 2px;
}

.hub-pick-priority-dot {
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-aws-orange, #dc7600);
    margin-top: 7px;
    opacity: 0.7;
}

.hub-pick-content {
    flex: 1;
    min-width: 0;
}

.hub-pick-title {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--m3-on-surface, #1C1B1F);
    display: block;
    line-height: 1.5;
}

.hub-pick-meta {
    display: flex;
    gap: var(--space-2, 8px);
    margin-top: var(--space-2, 8px);
    flex-wrap: wrap;
    align-items: center;
}

.hub-pick-cat {
    font-size: 0.72rem;
    padding: 2px 10px;
    border-radius: var(--radius-badge, 8px);
    background: var(--m3-surface-container, #F5F4F2);
    color: var(--m3-on-surface-variant, #49454F);
    font-weight: 500;
}

/* ─── Dark Mode ────────────────────────────────────────────── */

[data-theme="dark"] .hub-category-card {
    background: var(--m3-surface-container, #211F26);
}

[data-theme="dark"] .hub-category-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .hub-category-card-title {
    color: var(--m3-on-surface, #E6E1E5);
}

[data-theme="dark"] .hub-category-card-desc {
    color: var(--m3-on-surface-variant, #CAC4D0);
}

[data-theme="dark"] .hub-category-card-count {
    color: var(--m3-on-surface-variant, #CAC4D0);
}

[data-theme="dark"] .hub-updates-list {
    background: var(--m3-surface-container-low, #17161A);
}

[data-theme="dark"] .hub-update-item {
    border-bottom-color: var(--m3-outline-variant, #49454F);
}

[data-theme="dark"] .hub-update-date {
    background: transparent;
    color: var(--m3-on-surface-variant, #CAC4D0);
}

[data-theme="dark"] .hub-update-title {
    color: var(--m3-on-surface, #E6E1E5);
}

[data-theme="dark"] .hub-update-cat-badge,
[data-theme="dark"] .hub-pick-cat {
    background: var(--m3-surface-container-high, #2B2930);
    color: var(--m3-on-surface-variant, #CAC4D0);
}

[data-theme="dark"] .hub-pick-card {
    background: var(--m3-surface-container, #211F26);
}

[data-theme="dark"] .hub-pick-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .hub-pick-title {
    color: var(--m3-on-surface, #E6E1E5);
}

/* ─── Responsive ───────────────────────────────────────────── */

@media (max-width: 768px) {
    .hub-categories-grid {
        grid-template-columns: 1fr;
    }

    .hub-picks-grid {
        grid-template-columns: 1fr;
    }

    .hub-update-item {
        flex-direction: column;
        gap: var(--space-2, 8px);
    }

    .hub-update-date {
        align-self: flex-start;
    }

    .hub-category-card {
        padding: var(--space-4, 16px) var(--space-5, 20px);
    }
}