.admin-nav {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: #f5f5f5;
}

.tab-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    cursor: pointer;
}

.tab-btn.active {
    background: #007bff;
    color: white;
    border-radius: 4px;
}

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

.stat-card {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.active-chats-list {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1rem;
    padding: 1rem;
}

.chat-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}