/* Core Tree Layout */
.Treant {
    position: relative;
    overflow: hidden;
    padding: 20px;
}

.Treant > .node {
    position: absolute;
    text-align: center;
}

.Treant .node {
    padding: 8px 12px;
    border-radius: 6px;
    background: #3498db;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    min-width: 120px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.Treant .node:hover {
    background: #2c80b4;
}

/* Connector lines */
.Treant .connector {
    fill: none;
    stroke: #ccc;
    stroke-width: 2px;
}

/* Children container */
.Treant .node .collapse-switch {
    cursor: pointer;
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: #eee;
}