틀:트리 다이어그램/horizontal.css

.tree .root,
.tree ul,
.tree li {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
    display: table-cell;
}

.tree .root {
    margin: 0 0 1em;
    text-align: center;
    overflow-x: auto;
}

.tree ul {
	margin: 0 !important;
    width: 100%;
}

.tree li {
    padding: .5em 0;
    vertical-align: top;
}

.tree .root > ul {
    display: block;
}

.tree li > div:first-child {
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
}

.tree div:first-child + li > div:first-child {
    left: 50% !important;
}

.tree li:last-child > div:first-child {
    right: 50%;
}

.tree code,
.tree span {
    border-radius: .25rem;
    display: inline-block;
    margin: 0 .2em .5em;
    padding: .2em .5em;
    position: relative;
    width: max-content;

}

.tree ul > div:first-child,
.tree code > div:first-child,
.tree span > div:first-child {
    height: .5em;
    left: 50%;
    position: absolute;
}

.tree ul > div:first-child {
    top: -.5em;
}

.tree code > div:first-child,
.tree span > div:first-child {
    top: -.55em;
}

.tree .root > li {
    margin-top: 0;
}


.tree .root > div:first-child, 
.tree .root > li > span div:first-child, 
.tree .root > li > div:first-child {
    display: none;
}