.tr-engineering-graph-fallback {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2.5rem;
}

.tr-engineering-graph-fallback__group {
  padding: 1.2rem;
  border: 1px solid var(--tr-border);
  border-radius: 16px;
  background: rgba(17, 21, 28, .72);
}

.tr-engineering-graph-fallback__group h2 {
  margin-top: 0;
  text-transform: uppercase;
  letter-spacing: .08em;
  font: 700 .78rem/1.2 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--tr-cyan);
}

.tr-engineering-graph-fallback__group ul {
  display: grid;
  gap: .8rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tr-engineering-graph-fallback__group li {
  display: grid;
  gap: .25rem;
}

.tr-engineering-graph-fallback__group li span {
  color: var(--tr-muted);
  font-size: .92rem;
  line-height: 1.5;
}

.tr-engineering-graph.is-enhanced [data-tr-engineering-graph-fallback] {
  display: none;
}

.tr-engineering-graph {
  margin: 1.5rem 0 2.5rem;
}

.tr-engineering-graph__toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-bottom: 1rem;
}

.tr-engineering-graph__filter {
  min-height: 40px;
  padding: .55rem .8rem;
  border: 1px solid var(--tr-border);
  border-radius: 999px;
  color: var(--tr-muted);
  background: rgba(17, 21, 28, .8);
  font: 700 .76rem/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  cursor: pointer;
}

.tr-engineering-graph__filter[aria-pressed="true"] {
  color: #061016;
  border-color: rgba(115, 222, 250, .9);
  background: var(--tr-cyan);
}

.tr-engineering-graph__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: 1rem;
  align-items: start;
}

.tr-engineering-graph__stage {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  grid-template-rows: repeat(7, minmax(84px, auto));
  gap: .7rem;
  min-height: 760px;
  padding: 1rem;
  overflow: hidden;
  border: 1px solid var(--tr-border);
  border-radius: 20px;
  background:
    linear-gradient(rgba(156, 169, 184, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(156, 169, 184, .045) 1px, transparent 1px),
    radial-gradient(circle at 50% 20%, rgba(76, 201, 240, .06), transparent 45%),
    rgba(9, 11, 16, .55);
  background-size: 42px 42px, 42px 42px, auto, auto;
}

.tr-engineering-graph__edges {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.tr-engineering-graph__edge {
  fill: none;
  stroke: rgba(113, 128, 149, .34);
  stroke-width: 1.8;
  vector-effect: non-scaling-stroke;
  transition: opacity 180ms ease, stroke 180ms ease, stroke-width 180ms ease;
}

.tr-engineering-graph__edge.is-related {
  stroke: var(--tr-cyan);
  stroke-width: 2.7;
  opacity: .95;
}

.tr-engineering-graph__edge.is-filtered-out {
  opacity: .04;
}

.tr-engineering-graph__node {
  position: relative;
  z-index: 1;
  align-self: center;
  display: grid;
  gap: .36rem;
  min-height: 74px;
  padding: .8rem;
  border: 1px solid rgba(156, 169, 184, .2);
  border-radius: 14px;
  color: var(--tr-text) !important;
  background: rgba(17, 21, 28, .94);
  text-decoration: none !important;
  box-shadow: 0 10px 26px rgba(0, 0, 0, .16);
  transition: transform 160ms ease, opacity 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

button.tr-engineering-graph__node {
  width: 100%;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.tr-engineering-graph__node-kind {
  color: #718095;
  font: 700 .62rem/1.1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.tr-engineering-graph__node-label {
  font-weight: 750;
  line-height: 1.25;
}

.tr-engineering-graph__node[data-kind="technology"] { border-color: rgba(76, 201, 240, .28); }
.tr-engineering-graph__node[data-kind="domain"] { border-color: rgba(139, 92, 246, .34); }
.tr-engineering-graph__node[data-kind="project"] { border-color: rgba(74, 222, 128, .30); }
.tr-engineering-graph__node[data-kind="note"] { border-color: rgba(185, 168, 255, .26); }

.tr-engineering-graph__node:hover,
.tr-engineering-graph__node:focus-visible,
.tr-engineering-graph__node.is-selected {
  transform: translateY(-2px);
  border-color: var(--tr-cyan);
  box-shadow: 0 16px 38px rgba(0, 0, 0, .25), 0 0 24px rgba(76, 201, 240, .08);
}

.tr-engineering-graph__node.is-neighbor {
  border-color: rgba(76, 201, 240, .62);
}

.tr-engineering-graph__node.is-filtered-out {
  opacity: .12;
  pointer-events: none;
}

.tr-engineering-graph__detail {
  position: sticky;
  top: 84px;
  display: grid;
  gap: .7rem;
  padding: 1.15rem;
  border: 1px solid var(--tr-border);
  border-radius: 18px;
  background: rgba(17, 21, 28, .82);
}

.tr-engineering-graph__detail-kicker {
  color: var(--tr-cyan);
  font: 700 .68rem/1.2 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.tr-engineering-graph__detail h2 {
  margin: 0;
  font-size: 1.35rem;
}

.tr-engineering-graph__detail p {
  margin: 0;
  color: var(--tr-muted);
  line-height: 1.6;
}

.tr-engineering-graph__detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.tr-engineering-graph__detail-tag {
  padding: .3rem .5rem;
  border: 1px solid rgba(156, 169, 184, .18);
  border-radius: 999px;
  color: #b9c5d2;
  font: 600 .68rem/1.2 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.tr-engineering-graph__detail-link {
  width: fit-content;
  font-weight: 750;
}

@media (max-width: 980px) {
  .tr-engineering-graph__shell {
    grid-template-columns: 1fr;
  }

  .tr-engineering-graph__stage {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: none;
    min-height: 0;
  }

  .tr-engineering-graph__edges {
    display: none;
  }

  .tr-engineering-graph__node {
    grid-column: auto !important;
    grid-row: auto !important;
  }

  .tr-engineering-graph__detail {
    position: static;
  }
}

@media (max-width: 620px) {
  .tr-engineering-graph-fallback,
  .tr-engineering-graph__stage {
    grid-template-columns: 1fr;
  }

  .tr-engineering-graph__filter {
    flex: 1 1 calc(50% - .55rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .tr-engineering-graph__node,
  .tr-engineering-graph__edge,
  .tr-engineering-graph__filter {
    transition: none !important;
  }
}