.main-pane-container {
    display: flex;
    height: calc(100vh - 50px);
}

/* Left column (cascader) */
.pane-left {
    width: 20%;
    background-color: #f8f9fa;
    padding: 10px;
    overflow-y: auto;
}

/* Right column (modifier + preview) */
.pane-right {
    width: 80%;
    display: flex;
    flex-direction: column;
}

/* Top-right: Component modifier */
.pane-modifier {
    height: 40%;
    background-color: #f1f3f5;
    padding: 10px;
    overflow-y: auto;
    border-bottom: 1px solid #ccc;
}

/* Bottom-right: Preview */
.pane-preview {
    height: 60%;
    background-color: #ffffff;
    padding: 10px;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Bottom footer */
.pane-bottom {
    height: 50px;
    background-color: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
    border-top: 1px solid #ccc;
}