.research-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: var(--light-bg);
    color: var(--text-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn.active {
    background: var(--primary-color);
    color: white;
}

.research-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 2rem;
}

.research-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.research-card:hover {
    transform: translateY(-5px);
}

.research-card.featured {
    grid-column: 1 / -1;
}

.research-content {
    padding: 1.5rem;
}

.meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.category {
    color: var(--primary-color);
    font-weight: 500;
}

.date {
    color: #666;
}

.research-card h2