/* Resources Hub — curated dev learning links */
.rh-hub {
    --rh-accent: #2ecc71;
    --rh-accent-dim: rgba(46, 204, 113, 0.12);
    --rh-bg: #0a0a0a;
    --rh-card: #111111;
    --rh-border: #2a2a2a;
    --rh-text: #e0e0e0;
    --rh-muted: #888;
}

.rh-hub .rh-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.rh-hub .rh-stat {
    background: var(--rh-card);
    border: 1px solid var(--rh-border);
    border-radius: 12px;
    padding: 1.35rem 1rem;
    text-align: center;
    transition: transform 0.25s, border-color 0.25s;
}

.rh-hub .rh-stat:hover {
    transform: translateY(-4px);
    border-color: var(--rh-accent);
}

.rh-hub .rh-stat strong {
    display: block;
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--rh-accent);
    line-height: 1.1;
}

.rh-hub .rh-stat span {
    display: block;
    margin-top: 0.45rem;
    font-size: 0.85rem;
    color: var(--rh-muted);
}

.rh-hub .rh-filter {
    background: var(--rh-card);
    border: 1px solid var(--rh-border);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1.75rem;
}

.rh-hub .rh-search {
    width: 100%;
    padding: 0.75rem 1.1rem;
    background: #1e1e1e;
    border: 1px solid #333;
    border-radius: 8px;
    color: #fff;
    font-size: 0.95rem;
    font-family: inherit;
    margin-bottom: 0.85rem;
}

.rh-hub .rh-search:focus {
    outline: none;
    border-color: var(--rh-accent);
}

.rh-hub .rh-filter-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.rh-hub .rh-filter-btn {
    background: #1e1e1e;
    border: 1px solid #333;
    padding: 0.45rem 1rem;
    border-radius: 999px;
    cursor: pointer;
    color: #ccc;
    font-size: 0.82rem;
    font-family: inherit;
    transition: all 0.2s;
}

.rh-hub .rh-filter-btn:hover,
.rh-hub .rh-filter-btn.is-active {
    background: var(--rh-accent);
    border-color: var(--rh-accent);
    color: #000;
    font-weight: 700;
}

.rh-hub .rh-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
    gap: 1.25rem;
}

.rh-hub .rh-card {
    background: var(--rh-card);
    border: 1px solid var(--rh-border);
    border-radius: 12px;
    padding: 1.35rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.rh-hub .rh-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--rh-accent);
    transform: scaleY(0);
    transition: transform 0.25s;
}

.rh-hub .rh-card:hover {
    transform: translateY(-3px);
    border-color: var(--rh-accent);
    box-shadow: 0 10px 25px rgba(46, 204, 113, 0.08);
}

.rh-hub .rh-card:hover::before {
    transform: scaleY(1);
}

.rh-hub .rh-cat {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    background: var(--rh-accent-dim);
    color: var(--rh-accent);
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.rh-hub .rh-card h3 {
    font-size: 1.15rem;
    color: #fff;
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.rh-hub .rh-card p {
    color: var(--rh-muted);
    font-size: 0.88rem;
    margin-bottom: 0.65rem;
    line-height: 1.55;
}

.rh-hub .rh-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.65rem;
}

.rh-hub .rh-tag {
    background: #1a1a1a;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: 0.68rem;
    color: #777;
}

.rh-hub .rh-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--rh-accent);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.88rem;
}

.rh-hub .rh-link:hover {
    color: #58d68d;
    text-decoration: underline;
}

.rh-hub .rh-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--rh-muted);
    border: 1px dashed var(--rh-border);
    border-radius: 12px;
}

.rh-hub .rh-note {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.82rem;
    color: var(--rh-muted);
}

@media (max-width: 640px) {
    .rh-hub .rh-stat strong { font-size: 1.75rem; }
}