style.css

html, body {
    height: 100%;
}

body {
    font-family: sans-serif;
    margin: 0;
    display: grid;
    grid-template-rows: 1fr auto auto;
    grid-template-columns: auto 1fr;
    overflow: hidden;
    user-select: none;
}

input:not([type=checkbox]):not([type=file]) {
    width: 7em;
}

input:not([type=checkbox]):not([type=file]).small {
    width: 3em;
}

img {
    width: 1em;
    cursor: pointer;
}

img, label input, label select {
    float: right;
    margin-left: 0.5em;
}

svg * {
    fill: none;
    stroke: #000;
}

textarea {
    display: block;
    height: 1em;
    width: 100%;
}

#menu {
    border-right: 1px solid black;
    padding: 8px;
    background: #fff;
    overflow: auto;
    grid-row: 1 / 3;
}

#menu button {
    display: block;
    width: 100%;
}

#graph {
    overflow: scroll;
}

#container {
    display: grid;
    height: 0;
    width: 0;
}

#container > svg {
    grid-area: 1 / 1;
    z-index: 0;
    pointer-events: none;
}

#container > svg * {
    stroke-width: 0.1em;
    stroke-linecap: round;
}

#container > svg > :nth-child(even) {
    stroke-width: 0.25em;
}

#container > svg > :nth-child(even):not(:hover) {
    opacity: 0;
}

#container:not(.connect) > svg * {
    pointer-events: auto;
}

#container > fieldset {
    grid-area: 1/1;
    width: max-content;
    height: max-content;
    background: #fff;
}

#container > fieldset > svg {
    display: block;
    width: 300px;
    height: 150px;
    padding: 8px;
}

#container div, #dialog div, #dialog label {
    display: block;
    clear: both;
    min-height: 1.25em;
}

#container div:first-of-type, #dialog form > :first-child {
    font-weight: bold;
    text-align: center;
}

#container img[src$="#connect"], #container .multiple {
    float: right;
    margin-right: -1.25em;
}

#container img:first-child, #container .multiple:first-child {
    float: left;
    margin: 0 0.25em 0 calc(-1.25em - 1px);
}

#container .multiple img {
    display: block;
    float: none;
    margin: 0;
}

#param {
    border-top: 1px solid black;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-auto-rows: min-content;
    overflow: auto;
    grid-column: 1 / 3;
}

#param > * {
    padding: 4px;
}

#param > div {
    position: sticky;
    left: 0;
    border-right: 1px solid black;
    background: #fff;
}

#param > div {
    
}

#param svg {
    height: 2em;
    width: 100%;
}

#dialog {
    display: none;
    height: 100%;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background: #000a;
}

#dialog form {
    background: #fff;
    margin: auto;
    padding: 8px;
}

#dialog form > :last-child {
    display: flex;
    flex-wrap: wrap;
}

#dialog form > :last-child > * {
    flex: max-content;
}

#mdninfo {
    display: none;
    height: 100%;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    border: none;
}

#log {
    color: #f00;
}