.reference-intro {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
}

.reference-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0;
}

.reference-stat {
    text-align: center;
}

.reference-stat__number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.reference-filters {
    margin-bottom: 2rem;
    text-align: center;
}

.filter-group {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    padding: 1rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-color);
    border-radius: 0.25rem;
    background: transparent;
    color: var(--primary-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.reference-section {
    margin-bottom: 3rem;
}

.reference-section__title {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.reference-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.reference-item {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.reference-item:hover {
    transform: translateY(-5px);
}

.reference-item__title {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.reference-item__content {
    margin-bottom: 1rem;
}

.reference-item__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.reference-item__list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.reference-item__list li:last-child {
    border-bottom: none;
}

.reference-cta {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--background-color);
    border-radius: 0.5rem;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    .reference-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .filter-group {
        flex-direction: column;
    }

    .reference-list {
        grid-template-columns: 1fr;
    }
}