open-consul/ui/packages/consul-ui/app/components/consul/discovery-chain/layout.scss

%discovery-chain .resolvers,
%discovery-chain .splitters,
%discovery-chain .routes {
  @extend %chain-group;
}
%discovery-chain .route-card {
  @extend %route-card;
  @extend %with-chain-outlet;
}
%discovery-chain .splitter-card {
  @extend %splitter-card;
  @extend %with-chain-outlet;
}
%discovery-chain .resolver-card {
  @extend %resolver-card;
}

%discovery-chain path {
  @extend %discovery-chain-edge, %discovery-chain-edge-inactive;
}
%discovery-chain-edge:hover,
%discovery-chain-edge:focus {
  @extend %discovery-chain-edge-active;
}
%discovery-chain [id*=':']:not(path):hover {
  @extend %chain-node-active;
}

%discovery-chain {
  position: relative;
  display: flex;
  justify-content: space-between;
}
%discovery-chain svg {
  position: absolute;
}
%chain-group {
  padding: 10px 1% 10px 1%;
  width: 32%;
}
%chain-group > header {
  height: 18px;
}
%chain-group > header span {
  position: relative;
  z-index: 1;
  margin-left: 2px;
}
%chain-group [role='group'] {
  position: relative;
  z-index: 1;

  display: flex;
  flex-direction: column;
  justify-content: space-around;

  height: 100%;
}
/* TODO: resets - these probably should be changed to be specific */
/* to certain layouts rather than globally */
%chain-node {
  margin-top: 0 !important;
}
%chain-node dl {
  margin: 0;
  float: none;
}
/**/
%route-card,
%splitter-card,
%resolver-card {
  @extend %card;
  @extend %chain-node;
  margin-bottom: 20px;
}
/* route */
%route-card header.short dl {
  display: flex;
}
%route-card header.short dt::after {
  content: ' ';
  display: inline-block;
}
%route-card > header ul {
  float: right;
  margin-top: -2px;
}
%route-card > header ul li {
  margin-left: 5px;
}

%route-card section {
  display: flex;
}
%route-card section header {
  display: block;
  width: 19px;
  margin-right: 14px;
}
/**/
/* resolver */
%resolver-card a {
  display: block;
}
%resolver-card dl {
  display: flex;
  flex-wrap: wrap;
  margin-top: 5px;
}
%resolver-card dt {
  margin-right: 6px;
  margin-top: 1px;
  width: 23px;
  height: 20px;
}
%resolver-card ol {
  display: flex;
  flex-wrap: wrap;
  list-style-type: none;
}
%resolver-card ol li:not(:last-child)::after {
  display: inline-block;
  content: ',';
  margin-right: 0.2em;
  margin-left: -0.3em;
}
/**/
%with-chain-outlet {
  position: relative;
}
%with-chain-outlet::before {
  position: absolute;
  z-index: 1;
  right: -5px;
  top: 50%;
  margin-top: -5px;
  width: 10px;
  height: 10px;
}
%discovery-chain-joints {
  width: 10px;
  height: 100%;
  z-index: 1;
}
%discovery-chain .splitter-inlets,
%discovery-chain .resolver-inlets {
  @extend %discovery-chain-joints;
}
/* there are 3 columns, or %chain-groups the calculation here */
/* depends on the width of those */
%discovery-chain .splitter-inlets {
  left: 50%;
  /* keep the extra calculations here for doc purposes */
  margin-left: calc(calc(-32% / 2) + 1% - 3px);
}
%discovery-chain .resolver-inlets {
  /* keep the extra calculations here for doc purposes */
  right: calc(32% - 1% - 7px);
}