@import url("./course-layouts.css");
@import url("./mind-map.css");
@import url("./code-walk.css");
@import url("./hash-primitives.css");
@import url("./page-architectures.css");

.course-step-materialization {
  display: none !important;
}

.course-scenario-controls-anchor {
  position: relative;
  width: 100%;
  height: 0;
  min-height: 0;
  margin: 0;
  padding: 0;
  z-index: 30;
  pointer-events: none;
}

.course-scenario-controls-reserve {
  width: 100%;
  min-height: 0;
  margin: 0;
  padding: 0;
  pointer-events: none;
}

.viz-demo.course-scenario-controls-reserved :is(.viz-toolbar, .hash-demo-toolbar) {
  box-sizing: border-box;
  min-height: var(--course-scenario-controls-height, 0px);
  padding-right: calc(var(--course-scenario-controls-width, 0px) + 0.36rem);
}

.course-scenario-controls {
  position: absolute;
  top: 0.18rem;
  right: 0.18rem;
  display: flex;
  align-items: center;
  gap: 0.22rem;
  padding: 0.16rem 0.22rem;
  border: var(--viz-line) solid var(--viz-border);
  border-radius: var(--viz-radius-pill);
  background: color-mix(in srgb, var(--viz-paper), transparent 4%);
  font-size: var(--viz-micro-size);
  line-height: 1;
  white-space: nowrap;
  pointer-events: auto;
}

.course-scenario-step-status {
  min-width: 2.4em;
  padding: 0 0.12rem;
  color: var(--viz-muted);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  text-align: center;
}

.course-scenario-control {
  border: var(--viz-line) solid var(--viz-border);
  border-radius: var(--viz-radius-pill);
  background: var(--viz-paper);
  color: var(--viz-ink);
  padding: 0.16rem 0.32rem;
  font: inherit;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
}

.course-scenario-control:hover:not(:disabled),
.course-scenario-control:focus-visible {
  border-color: var(--viz-active);
  color: var(--viz-active);
}

.course-scenario-control:disabled {
  opacity: 0.38;
  cursor: default;
}

.viz-demo {
  width: 100%;
  margin: var(--viz-space-5) auto 0;
}

/* Shared terminal beat for every teaching animation. The completion frame sits
   3px outside the scenario host so the black border does not crowd the content.
   The overlay does not take layout space. */
.reveal .slides [data-scenario] {
  position: relative;
}

.reveal .slides [data-scenario]::after {
  content: "";
  position: absolute;
  inset: -3px;
  box-sizing: border-box;
  border: 3px solid transparent;
  pointer-events: none;
  z-index: 100;
}

.reveal .slides section.present [data-scenario].course-animation-complete::after {
  border-color: #111;
}

.reveal .columns > .column > .viz-demo[class] {
  margin-inline: 0;
}

.reveal .slides section.btree-definition-slide .slide-body > p {
  margin-block: 0;
}

.reveal .slides section.btree-definition-slide .slide-body > .viz-demo {
  margin-top: 0;
}

.reveal .slides section.btree-definition-slide .slide-body > ul {
  margin-block: 0.08rem 0.12rem;
}

.reveal .slides section.btree-definition-slide .slide-body > ul > li {
  margin-block: 0.02rem;
}

.reveal .slides .viz-demo.pascal-queue-viz {
  margin-top: 0;
}

.viz-shell {
  background: var(--viz-paper);
  color: var(--viz-ink);
  overflow: visible;
}

.viz-toolbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--viz-space-7);
  padding: 0.08rem 0 0.08rem;
  font-size: var(--viz-body-size);
  line-height: 1;
}

.viz-toolbar-title {
  justify-self: start;
  font-weight: 800;
}

.viz-toolbar-controls {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 0.36rem;
}

.viz-toolbar .viz-btn {
  --btn-color: var(--viz-active);
  border: var(--viz-line) solid color-mix(in srgb, var(--btn-color), var(--viz-ink) 20%);
  border-radius: var(--viz-radius-pill);
  background: linear-gradient(180deg, var(--viz-paper) 0%, color-mix(in srgb, var(--btn-color), var(--viz-paper) 90%) 100%);
  color: color-mix(in srgb, var(--btn-color), var(--viz-ink) 22%);
  padding: 0.15rem 0.44rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
  cursor: pointer;
}

.viz-toolbar .viz-btn:hover {
  background: color-mix(in srgb, var(--btn-color), var(--viz-paper) 84%);
  transform: translateY(-1px);
}

.viz-toolbar .viz-btn-prev,
.viz-toolbar .viz-btn-next {
  --btn-color: var(--viz-active);
}

.viz-toolbar .viz-btn-run {
  --btn-color: var(--viz-success);
}

.viz-toolbar .viz-btn-final {
  --btn-color: var(--viz-warning);
}

.viz-toolbar .viz-btn-reset {
  --btn-color: var(--viz-muted);
}

.viz-toolbar-status {
  justify-self: end;
  color: var(--viz-muted);
  font-weight: 700;
}

.viz-canvas {
  position: relative;
  min-height: 0;
  padding: 7px 0.45rem;
}

.viz-antv-canvas {
  position: relative;
  width: 100%;
  height: 300px;
}

.viz-antv-canvas svg {
  shape-rendering: geometricPrecision;
  text-rendering: geometricPrecision;
}

.viz-canvas.viz-state-enter {
  animation: viz-state-enter 220ms ease-out;
}

@keyframes viz-state-enter {
  from {
    opacity: 0.45;
    transform: translateY(2px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .viz-canvas.viz-state-enter {
    animation: none;
  }
}

.viz-antv-array {
  height: 250px;
}

.viz-antv-hash,
.viz-antv-chainhash,
.viz-antv-pointer {
  height: 285px;
}

.viz-antv-cuckoo {
  height: 320px;
}

.viz-antv-avl {
  height: 500px;
  overflow-x: auto;
}

.viz-antv-avl-cases {
  height: 375px;
}

.viz-antv-btree-degree {
  height: 310px;
}

.viz-antv-btree-insert {
  height: 400px;
}

.viz-antv-wide-fanout {
  height: 360px;
}

.viz-antv-dijkstra {
  height: 330px;
}

.viz-antv-chart,
.viz-antv-grid,
.viz-antv-tree,
.viz-antv-graph {
  height: 300px;
}

.viz-calc {
  min-height: 1.05rem;
  padding: 0.07rem 0.65rem 0.03rem;
  font-size: var(--viz-body-size);
  text-align: center;
  color: var(--viz-ink);
  font-weight: 700;
}

.viz-note {
  min-height: 1rem;
  padding: 0.05rem 0.65rem 0.11rem;
  color: #222;
  font-size: var(--viz-body-size);
  line-height: 1.16;
  text-align: center;
}

.algorithm-teaching-steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3rem 0.65rem;
  margin: 0.35rem 0 0 !important;
  padding: 0 !important;
  list-style: none;
  font-size: 0.48em;
  line-height: 1.15;
}

.algorithm-teaching-steps li {
  margin: 0 !important;
  padding: 0.16rem 0.4rem;
  border: var(--viz-line) solid var(--viz-border);
  border-radius: var(--viz-radius-pill);
  background: var(--viz-active-soft);
}

.algorithm-teaching-steps li.fragment:not(.current-fragment),
.dijkstra-teaching-steps li.fragment:not(.current-fragment) {
  display: none;
}

.algorithm-teaching-steps li.fragment.current-fragment,
.dijkstra-teaching-steps li.fragment.current-fragment {
  opacity: 1;
}

.algorithm-teaching-steps,
.dijkstra-teaching-steps {
  min-height: 1.75rem;
}

.viz-grid {
  display: grid;
  gap: 0.5rem;
}

.viz-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.viz-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.viz-card {
  border: var(--viz-line) solid var(--viz-border);
  border-radius: var(--viz-radius-md);
  background: var(--viz-paper);
  padding: 0.5rem;
}

.viz-card-title {
  font-size: var(--viz-body-size);
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.viz-muted {
  color: var(--viz-muted);
}

.viz-active {
  color: var(--viz-active);
}

.viz-success {
  color: var(--viz-success);
}

.viz-warning {
  color: var(--viz-warning);
}

.viz-antv-linked-list {
  height: 255px;
}

.viz-antv-queue {
  height: 280px;
}

.viz-antv-stack {
  height: 300px;
}

.viz-antv-polynomial {
  height: 260px;
}

.viz-antv-josephus {
  height: 320px;
}

.viz-antv-cursor-list {
  height: 320px;
}

.viz-antv-bucket {
  height: 320px;
}

.viz-demo[data-scenario="ch03.singly-delete"] {
  min-width: 0;
  overflow: hidden;
}

.viz-demo[data-scenario="ch03.singly-delete"] .viz-antv-linked-list {
  width: 100%;
  min-width: 0;
  overflow: hidden;
}

.viz-demo[data-scenario="ch05.hashing"] {
  width: 100%;
  min-width: 0;
  overflow: hidden;
}

.viz-demo[data-scenario="ch05.hashing"] .viz-antv-hash-table {
  width: 100%;
  height: 320px;
  min-width: 0;
  overflow: hidden;
}

/* Hashing chapter component sizes. */
.viz-antv-hash-table,
.viz-antv-hash-chain,
.viz-antv-hash-cuckoo {
  width: 100%;
}

.viz-antv-hash-table {
  height: 300px;
}

.viz-antv-hash-chain {
  height: 320px;
}

.viz-antv-hash-cuckoo {
  height: 335px;
}

/* Generic component helpers. */
.viz-flex-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.viz-flex-column {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.viz-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.viz-label {
  font-size: var(--viz-body-size);
  font-weight: 700;
}

.viz-caption {
  font-size: var(--viz-note-size);
  line-height: 1.2;
  color: var(--viz-muted);
}

.viz-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: var(--viz-line) solid var(--viz-border);
  border-radius: var(--viz-radius-pill);
  padding: 0.12rem 0.35rem;
  background: var(--viz-paper);
  font-size: var(--viz-note-size);
  font-weight: 700;
}

.viz-chip.is-active {
  border-color: var(--viz-active);
  background: var(--viz-active-soft);
  color: var(--viz-active);
}

.viz-chip.is-success {
  border-color: var(--viz-success);
  background: var(--viz-success-soft);
  color: var(--viz-success);
}

.viz-chip.is-warning {
  border-color: var(--viz-warning);
  background: var(--viz-warning-soft);
  color: var(--viz-warning);
}

.viz-chip.is-muted {
  color: var(--viz-muted);
}

.viz-separator {
  height: 1px;
  background: var(--viz-border);
  margin: 0.35rem 0;
}

.viz-stack-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.viz-stack-cell {
  min-width: 2.3rem;
  min-height: 1.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: var(--viz-line) solid var(--viz-border);
  background: var(--viz-paper);
  font-size: var(--viz-body-size);
  font-weight: 700;
}

.viz-stack-cell.is-active {
  border-color: var(--viz-active);
  background: var(--viz-active-soft);
}

.viz-stack-cell.is-success {
  border-color: var(--viz-success);
  background: var(--viz-success-soft);
}

.viz-stack-cell.is-warning {
  border-color: var(--viz-warning);
  background: var(--viz-warning-soft);
}

.viz-pair {
  display: inline-grid;
  grid-template-columns: auto auto;
  gap: 0.25rem;
  align-items: center;
}

.viz-pair-key {
  font-weight: 800;
}

.viz-pair-value {
  color: var(--viz-muted);
}

.viz-antv-pq {
  height: 320px;
}

.viz-antv-dsu {
  height: 300px;
}

.viz-antv-sorting {
  height: 300px;
}

.viz-antv-tree-wide {
  height: 360px;
}

.viz-antv-graph-wide {
  height: 360px;
}

.viz-antv-code-sync {
  height: 280px;
}

.hash-v2-concept {
  width: 100%;
  min-width: 0;
  min-height: 260px;
  overflow: hidden;
  color: var(--viz-ink);
}

.hash-v2-roadmap {
  display: grid;
  grid-template-columns: minmax(7rem, 0.65fr) minmax(0, 1.8fr);
  gap: 0.55rem;
  align-items: center;
  min-height: 300px;
}

.hash-v2-roadmap-center,
.hash-v2-roadmap-card,
.hash-v2-concept-panel {
  border: var(--viz-line-strong) solid var(--viz-ink);
  background: var(--viz-paper);
}

.hash-v2-roadmap-center {
  padding: 0.65rem 0.45rem;
  text-align: center;
  font-size: 0.54em;
  font-weight: 900;
}

.hash-v2-roadmap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--viz-space-6);
}

.hash-v2-roadmap-card {
  padding: 0.32rem;
  text-align: center;
  font-size: 0.4em;
}

.hash-v2-roadmap-card strong,
.hash-v2-roadmap-card span {
  display: block;
}

.hash-v2-roadmap-card span {
  margin-top: 0.08rem;
  color: #555;
  font-size: 0.86em;
}

.hash-v2-search-compare,
.hash-v2-prime-compare {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
}

.hash-v2-search-compare {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hash-v2-prime-compare {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.hash-v2-prime-compare .hash-v2-concept-title,
.hash-v2-prime-compare .hash-v2-concept-panel p {
  font-size: 18.5px;
}

.hash-v2-mod .hash-v2-formula {
  font-size: 18.5px;
}

.hash-v2-concept-panel {
  min-width: 0;
  padding: 0.3rem;
  text-align: center;
}

.hash-v2-concept-title,
.hash-v2-formula {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.45em;
  font-weight: 900;
  text-align: center;
}

.hash-v2-concept-panel p,
.hash-v2-ball-summary {
  margin: 0.25rem 0 0;
  font-size: var(--viz-note-size);
  font-weight: 750;
  text-align: center;
}

.hash-v2-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.18rem;
  align-items: center;
  justify-content: center;
}

.hash-v2-flow span {
  border: var(--viz-line) solid var(--viz-muted);
  padding: 0.12rem 0.2rem;
  font-size: var(--viz-note-size);
  font-weight: 750;
}

.hash-v2-flow .is-hit {
  border-color: var(--viz-success);
  color: var(--viz-success);
}

.hash-v2-mod {
  width: min(34rem, 100%);
  margin: 0 auto;
}

.hash-v2-buckets {
  display: grid;
  gap: 0.1rem;
  min-width: 0;
}

.hash-v2-bucket-row {
  display: grid;
  grid-template-columns: minmax(1.8rem, 0.22fr) minmax(0, 1fr);
  min-width: 0;
  border: var(--viz-line) solid var(--viz-border);
  font-size: 18.5px;
}

.hash-v2-bucket-row.is-active {
  outline: 2px solid #1266d6;
}

.hash-v2-bucket-index,
.hash-v2-bucket-values {
  min-width: 0;
  padding: 0.1rem 0.22rem;
}

.hash-v2-bucket-index {
  background: #f1f3f5;
  font-weight: 850;
  text-align: center;
}

.hash-v2-bucket-values {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 700;
}

.hash-v2-bucket-values.is-empty {
  color: #888;
  font-weight: 500;
}

.hash-v2-balls {
  display: grid;
  align-content: center;
  min-height: 280px;
}

.hash-v2-ball-chart {
  display: grid;
  grid-template-columns: repeat(20, minmax(0, 1fr));
  gap: 0.12rem;
  align-items: end;
  height: 190px;
  padding: 0.35rem;
  border: var(--viz-line-strong) solid var(--viz-ink);
}

.hash-v2-ball-bar {
  position: relative;
  min-width: 0;
  border: var(--viz-line) solid var(--viz-active);
  background: var(--viz-active-soft);
}

.hash-v2-ball-bar span {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--viz-micro-size);
}


.dijkstra-code-sync .viz-demo {
  width: calc(100% - 0.35rem);
}

/* The Code Walk uses the shared content-driven vertical contract. The external
   semantic note is the only explanation band, so the renderer's duplicate
   toolbar/calc/note chrome is removed without changing animation typography. */
.dijkstra-code-walk .viz-demo {
  width: 100%;
}

.dijkstra-code-walk .viz-toolbar,
.dijkstra-code-walk .viz-calc,
.dijkstra-code-walk .viz-note {
  display: none !important;
}

.dijkstra-code-walk .viz-canvas {
  min-height: 0 !important;
  padding: 0 !important;
}

/* Dijkstra v2: one teaching timeline drives code, graph, and distance table. */
.dijkstra-code-sync .columns,
.dijkstra-code-sync .column,
.dijkstra-v2-layout,
.dijkstra-v2-graph,
.dijkstra-v2-table {
  min-width: 0;
}

.dijkstra-code-sync pre {
  line-height: 1.2;
}

.dijkstra-v2-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(12rem, 0.85fr);
  gap: 0.32rem;
  align-items: stretch;
  width: 100%;
}

.dijkstra-v2-graph,
.dijkstra-v2-table {
  overflow: hidden;
  border: var(--viz-line-strong) solid var(--viz-ink);
  background: var(--viz-paper);
}

.dijkstra-v2-table {
  display: flex;
  align-items: stretch;
}

.dijkstra-teaching-steps ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--viz-space-1) var(--viz-space-5);
  margin: 0.18rem 0 0;
  padding: 0;
  list-style: none;
}

.dijkstra-teaching-steps li {
  min-width: 0;
  margin: 0;
  padding: 0.08rem 0.14rem;
  border-left: var(--viz-line-focus) solid var(--viz-active);
  background: var(--viz-paper);
  font-size: 0.34em;
  line-height: 1.2;
}

.gallery-dijkstra-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(12rem, 0.85fr);
  gap: 0.32rem;
  min-width: 0;
}

.gallery-dijkstra-graph,
.gallery-dijkstra-table {
  min-width: 0;
  overflow: hidden;
  background: var(--viz-paper);
}

.ch08-multilist-layout {
  display: grid;
  grid-template-columns: minmax(16rem, 0.82fr) minmax(24rem, 1.18fr);
  gap: 0.5rem;
  align-items: start;
  width: 100%;
  min-width: 0;
}

.ch08-multilist-graph,
.ch08-multilist-table-wrap {
  min-width: 0;
}

.ch08-multilist-table-wrap {
  padding-top: 0.24rem;
}

.ch08-multilist-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  background: var(--viz-paper, #fff);
  color: var(--viz-ink, #111);
  font-size: 15px;
  line-height: 1.2;
}

.ch08-multilist-vertex-table {
  width: 46%;
  margin-bottom: 0.42rem;
}

.ch08-multilist-table th,
.ch08-multilist-table td {
  border: 1px solid var(--viz-ink, #111);
  padding: 0.38rem 0.3rem;
  text-align: center;
  vertical-align: middle;
}

.ch08-multilist-table th {
  background: var(--viz-paper, #fff);
  font-weight: 800;
}

.ch08-multilist-table td {
  font-weight: 650;
}

.ch08-multilist-table tr.is-path td:first-child {
  font-weight: 850;
}

.ch08-multilist-table tr.is-active td {
  border-top-width: 2px;
  border-bottom-width: 2px;
}

.ch08-multilist-table td.is-pointer {
  background: color-mix(in srgb, var(--viz-active, #2563eb) 12%, white);
  box-shadow: inset 0 0 0 2px var(--viz-active, #2563eb);
  font-weight: 850;
}

.ch08-multilist-rule {
  margin-top: 0.35rem;
  text-align: center;
  font-size: 15px;
  font-weight: 800;
  color: var(--viz-ink, #111);
}

.ch09-radix-stage {
  position: relative;
  display: grid;
  grid-template-rows: 1.6rem 2.3rem minmax(10rem, 1fr) 2.3rem;
  gap: 0.34rem;
  width: 100%;
  min-height: 20.5rem;
  padding: 0.05rem 0.35rem 0.15rem;
  box-sizing: border-box;
}

.ch09-radix-digit {
  text-align: center;
  font-size: 15px;
  font-weight: 850;
  color: var(--viz-active);
}

.ch09-radix-sequence-table,
.ch09-radix-bucket-table {
  border-collapse: collapse;
  table-layout: fixed;
  background: var(--viz-paper, #fff);
  color: var(--viz-ink, #111);
  font-size: 15px;
  line-height: 1.08;
}

.ch09-radix-sequence-table {
  width: min(42rem, 78%);
  margin: 0 auto;
}

.ch09-radix-bucket-tables {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.72rem;
  align-items: stretch;
  min-width: 0;
}

.ch09-radix-bucket-table {
  width: 100%;
}

.ch09-radix-sequence-table th,
.ch09-radix-sequence-table td,
.ch09-radix-bucket-table th,
.ch09-radix-bucket-table td {
  border: 1px solid var(--viz-edge, #666) !important;
  background: var(--viz-paper, #fff) !important;
  padding: 0.25rem 0.2rem;
  height: 1.62rem;
  text-align: center !important;
  vertical-align: middle;
  box-sizing: border-box;
}

.ch09-radix-sequence-table th,
.ch09-radix-bucket-table th {
  font-weight: 850;
}

.ch09-radix-sequence-table th {
  width: 4.2rem;
}

.ch09-radix-bucket-table th:first-child {
  width: 2.8rem;
}

.ch09-radix-bucket-table thead th {
  background: var(--viz-paper, #fff) !important;
  font-weight: 800;
}

.ch09-radix-bucket-table tr.is-active > th,
.ch09-radix-bucket-table tr.is-active > td,
.ch09-radix-sequence-table td.is-active {
  background: var(--viz-warning-soft) !important;
  box-shadow: inset 0 0 0 1.5px var(--viz-warning);
  font-weight: 850;
}

.ch09-radix-sequence-table td.is-confirmed {
  background: var(--viz-success-soft) !important;
  box-shadow: inset 0 0 0 1px var(--viz-success);
  font-weight: 800;
}

.ch09-radix-motion {
  position: absolute;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  border: 2px solid var(--viz-warning);
  background: var(--viz-warning-soft);
  color: var(--viz-ink, #111);
  font-size: 15px;
  font-weight: 850;
  pointer-events: none;
}

.ch09-radix-motion.is-reference {
  border-color: var(--viz-reference);
  background: var(--viz-reference-soft);
}

.ch09-radix-motion[hidden] {
  display: none;
}

@media (max-width: 760px) {
  .ch08-multilist-layout {
    grid-template-columns: 1fr;
  }

  .hash-v2-roadmap,
  .hash-v2-search-compare,
  .hash-v2-prime-compare {
    grid-template-columns: 1fr;
  }

  .hash-v2-roadmap-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dijkstra-v2-layout,
  .dijkstra-teaching-steps ul,
  .gallery-dijkstra-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .viz-toolbar {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }
  .viz-toolbar-title,
  .viz-toolbar-controls,
  .viz-toolbar-status {
    justify-self: center;
  }
  .viz-grid-2,
  .viz-grid-3 {
    grid-template-columns: 1fr;
  }
}