body {
    padding-top: 20px;
    background-color: #f8f9fa;
}

.department-header {
    margin-bottom: 20px;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.card-header {
    font-weight: 600;
}

.profile-picture {
    width: 150px;
    height: 150px;
    object-fit: cover;
}

.online-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 5px;
}

.online {
    background-color: #28a745;
}

.offline {
    background-color: #6c757d;
}

#chat-messages {
    background-color: #f8f9fa;
}

.message-time {
    font-size: 0.8rem;
    color: #6c757d;
}