.designer-canvas {
    position: relative;
    width: 100%;
    height: 700px;
    border: 2px solid #d9d9d9;
    background: white;
    overflow: auto;
}

.designer-node {
    position: absolute;
    width: 140px;
    height: 60px;
    background: #2196F3;
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    cursor: pointer;
    border: 2px solid black;
    transition: .2s;
}

    .designer-node.selected {
        background: #ff9800;
        transform: scale(1.05);
    }