.collapse-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    margin-bottom: 15px;
}

.collapse-header h3 {
    margin: 0;
    color: #4b6cb7;
    font-size: 1.2rem;
}

.collapse-icon {
    transition: transform 0.3s ease;
    font-size: 1.2rem;
    color: #4b6cb7;
}

.collapse-content {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
}

.collapse-content.collapsed {
    max-height: 0;
    opacity: 0;
}

.collapse-content.expanded {
    max-height: 500px;
    opacity: 1;
}