.idea-bg {
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: all 0.5s ease;
    z-index: 0;
}

.idea-list {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.idea-desc {
    opacity: 0;
    max-height: 0;
    transition: all 0.3s ease;
}

.idea-item.active .idea-desc {
    opacity: 1;
    max-height: 200px;
}