.lab-page .lab-hero {
  min-height: 62svh;
  background:
    radial-gradient(circle at 84% 22%, rgba(241, 199, 170, 0.16), transparent 28%),
    linear-gradient(135deg, #102d24, #191916 72%);
}

.lab-page .lab-hero::before {
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 1;
}

.lab-hero-action {
  margin-top: 28px;
}

.lab-content {
  display: grid;
  gap: 88px;
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  padding: 88px 0 104px;
}

.lab-introduction,
.lab-boundary {
  display: grid;
  grid-template-columns: minmax(220px, 0.66fr) minmax(0, 1.34fr);
  gap: 58px;
}

.lab-introduction h2,
.lab-boundary h2,
.lab-section-heading h2 {
  margin-top: 12px;
  font-size: clamp(2rem, 4vw, 3.35rem);
}

.lab-introduction p,
.lab-boundary p,
.lab-section-heading > p:last-child,
.lab-simulator-header p {
  color: var(--ink-soft);
}

.lab-introduction p,
.lab-boundary p {
  margin: 0;
  font-size: 1.08rem;
}

.lab-principles {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.lab-principles li {
  padding: 12px 0 12px 18px;
  border-left: 2px solid var(--copper);
  color: var(--ink-soft);
}

.lab-simulators {
  display: grid;
  gap: 30px;
  scroll-margin-top: 92px;
}

.lab-section-heading {
  display: grid;
  gap: 12px;
  max-width: 760px;
  margin-bottom: 10px;
}

.lab-section-heading > p:last-child {
  margin: 0;
}

.lab-simulator {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-strong);
  box-shadow: var(--shadow);
}

.lab-simulator-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  padding: 30px;
  border-bottom: 1px solid var(--line);
}

.lab-simulator-header > div {
  max-width: 760px;
}

.lab-simulator-header h3 {
  margin-top: 7px;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
}

.lab-simulator-header p:not(.lab-model-index) {
  margin: 10px 0 0;
}

.lab-scenario-panel,
.lab-builder {
  display: none;
}

.lab-ready .lab-scenario-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, 0.62fr);
  gap: 18px 28px;
  padding: 24px 30px;
  border-bottom: 1px solid var(--line);
  background: var(--detail-surface);
}

.lab-scenario-panel h4,
.lab-playback-panel h4,
.lab-builder-plan-heading h4 {
  margin-top: 5px;
  font-size: 1.15rem;
}

.lab-scenario-panel p:not(.lab-panel-kicker) {
  margin: 8px 0 0;
  color: var(--ink-soft);
}

.lab-panel-kicker {
  margin: 0;
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 840;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lab-scenario-controls,
.lab-builder-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 10px;
  align-content: start;
}

.lab-scenario-controls label,
.lab-builder-controls label {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 820;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.lab-scenario-controls select,
.lab-builder-controls select {
  width: 100%;
  min-height: 44px;
  padding: 9px 34px 9px 11px;
  border: 1px solid var(--panel-border-strong);
  border-radius: 5px;
  background: var(--paper-strong);
  color: var(--ink);
  font: inherit;
  font-weight: 680;
}

.lab-scenario-controls .lab-text-action {
  grid-column: 1 / -1;
  justify-self: start;
}

.lab-panel-status {
  grid-column: 1 / -1;
  margin: 0;
  padding: 10px 12px;
  border-left: 3px solid var(--green);
  background: var(--green-tint);
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 660;
}

.lab-model-index,
.lab-state-kicker {
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 840;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lab-interactive {
  display: none;
}

.lab-ready .lab-interactive {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(260px, 0.92fr);
}

.lab-state-panel,
.lab-control-panel,
.lab-history-panel {
  padding: 28px 30px;
}

.lab-state-panel {
  border-right: 1px solid var(--line);
}

.lab-control-panel {
  background: var(--panel-wash);
}

.lab-playback-panel {
  grid-column: 1 / -1;
  padding: 24px 30px 28px;
  border-top: 1px solid var(--line);
  background: var(--detail-surface);
}

.lab-state-heading,
.lab-control-heading,
.lab-history-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.lab-state-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

.lab-state-kicker span {
  color: var(--muted);
}

.lab-state-heading h4,
.lab-control-heading h4,
.lab-history-heading h4 {
  margin-top: 5px;
  font-size: 1.32rem;
}

.lab-outcome {
  flex: 0 0 auto;
  padding: 6px 10px;
  border: 1px solid var(--panel-border-strong);
  border-radius: 999px;
  color: var(--action-ink);
  font-size: 0.72rem;
  font-weight: 840;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.lab-outcome[data-outcome="blocked"] {
  border-color: var(--copper);
  color: var(--copper);
}

.lab-state-summary {
  margin: 14px 0 0;
  color: var(--ink-soft);
}

.lab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--line);
}

.lab-facts div {
  min-width: 0;
  padding: 12px 14px;
  background: var(--detail-surface);
}

.lab-facts dt {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 820;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.lab-facts dd {
  margin: 5px 0 0;
  color: var(--ink);
  font-weight: 720;
  overflow-wrap: anywhere;
}

.lab-status {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--green);
  background: var(--green-tint);
  color: var(--ink-soft);
  font-weight: 680;
}

.lab-control-heading {
  align-items: baseline;
}

.lab-playback-heading,
.lab-builder-plan-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}

.lab-playback-heading > span,
.lab-builder-plan-heading > span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 760;
}

.lab-reset {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--action-ink);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 0.22em;
  cursor: pointer;
}

.lab-secondary-action,
.lab-text-action {
  min-height: 42px;
  border-radius: 5px;
  font: inherit;
  font-weight: 780;
  cursor: pointer;
}

.lab-secondary-action {
  padding: 9px 13px;
  border: 1px solid var(--green);
  background: transparent;
  color: var(--action-ink);
}

.lab-text-action {
  padding: 5px 0;
  border: 0;
  background: transparent;
  color: var(--action-ink);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.lab-secondary-action:disabled,
.lab-text-action:disabled,
.lab-scenario-controls select:disabled,
.lab-builder-controls select:disabled {
  opacity: 0.46;
  cursor: not-allowed;
}

.lab-actions {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.lab-action {
  width: 100%;
  min-height: 48px;
  padding: 12px 15px;
  border: 1px solid var(--green);
  border-radius: 5px;
  background: var(--green-deep);
  color: var(--white);
  font: inherit;
  font-weight: 780;
  text-align: left;
  cursor: pointer;
  transition:
    transform 150ms ease,
    border-color 150ms ease,
    background-color 150ms ease;
}

.lab-action:hover {
  transform: translateY(-1px);
}

.lab-action-blocked {
  border-color: var(--panel-border-strong);
  background: transparent;
  color: var(--action-ink);
}

.lab-action:focus-visible,
.lab-reset:focus-visible,
.lab-secondary-action:focus-visible,
.lab-text-action:focus-visible,
.lab-scenario-controls select:focus-visible,
.lab-builder-controls select:focus-visible,
.lab-timeline button:focus-visible,
.lab-builder summary:focus-visible,
.lab-static-sequence summary:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

.lab-complete-message {
  margin: 0;
  color: var(--ink-soft);
}

.lab-playback-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 16px;
}

.lab-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1px;
  margin: 18px 0 0;
  padding: 1px;
  background: var(--line);
  list-style: none;
}

.lab-timeline li {
  min-width: 0;
  background: var(--paper-strong);
}

.lab-timeline button {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  width: 100%;
  min-height: 56px;
  padding: 10px;
  border: 0;
  border-left: 3px solid transparent;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.82rem;
  text-align: left;
  cursor: pointer;
}

.lab-timeline button span:first-child {
  color: var(--green);
  font-size: 0.7rem;
  font-weight: 840;
}

.lab-timeline li[data-timeline-state="complete"] button {
  background: var(--green-tint);
}

.lab-timeline li[data-timeline-state="current"] button {
  border-left-color: var(--copper);
  color: var(--ink);
  font-weight: 760;
}

.lab-timeline-empty {
  grid-column: 1 / -1;
  padding: 13px 14px;
  color: var(--muted);
}

.lab-history-panel {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
}

.lab-history-heading span {
  color: var(--muted);
  font-size: 0.78rem;
}

.lab-history {
  display: grid;
  gap: 1px;
  margin: 18px 0 0;
  padding: 0;
  background: var(--line);
  list-style: none;
}

.lab-history li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 14px;
  background: var(--paper-strong);
}

.lab-history li[data-outcome="blocked"] {
  border-left: 3px solid var(--copper);
}

.lab-history li.lab-history-current {
  position: relative;
  z-index: 1;
  box-shadow: inset 0 0 0 2px var(--green);
  animation: lab-history-emphasis 420ms ease-out;
}

.lab-history li > span:last-child {
  display: grid;
  gap: 2px;
}

.lab-history li > span:last-child > span {
  color: var(--muted);
  font-size: 0.9rem;
}

.lab-history-step {
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 840;
}

.lab-history .lab-history-empty {
  display: block;
  color: var(--muted);
}

@keyframes lab-history-emphasis {
  from {
    background: var(--green-tint);
  }

  to {
    background: var(--paper-strong);
  }
}

.lab-ready .lab-builder {
  display: block;
  margin: 24px 30px 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-wash);
}

.lab-builder summary {
  padding: 14px 16px;
  color: var(--action-ink);
  font-weight: 800;
  cursor: pointer;
}

.lab-builder-body {
  display: grid;
  gap: 18px;
  padding: 0 16px 18px;
}

.lab-builder-body > p:first-child {
  margin: 0;
  color: var(--ink-soft);
}

.lab-builder-controls {
  grid-template-columns: minmax(0, 1fr) auto;
}

.lab-builder-plan {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lab-builder-plan li {
  display: grid;
  gap: 3px;
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: 4px;
  background: var(--paper-strong);
}

.lab-builder-plan li[data-outcome="blocked"] {
  border-left-color: var(--copper);
}

.lab-builder-plan li span {
  color: var(--muted);
  font-size: 0.84rem;
}

.lab-builder-plan .lab-builder-empty {
  grid-column: 1 / -1;
  display: block;
  border-left-color: var(--line);
  color: var(--muted);
}

.lab-builder-plan-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.lab-builder-plan-actions .lab-secondary-action {
  margin-left: auto;
}

.lab-static-sequence {
  margin: 0 30px 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--detail-surface);
}

.lab-static-sequence summary {
  padding: 14px 16px;
  color: var(--action-ink);
  font-weight: 800;
  cursor: pointer;
}

.lab-static-sequence ol {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 2px 28px 20px 48px;
  color: var(--ink-soft);
}

.lab-boundary {
  padding: 38px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--green);
  border-radius: 8px;
  background: var(--paper-strong);
}

.lab-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  margin-top: 24px;
}

@media (max-width: 900px) {
  .lab-introduction,
  .lab-boundary,
  .lab-ready .lab-interactive,
  .lab-ready .lab-scenario-panel {
    grid-template-columns: 1fr;
  }

  .lab-state-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  .lab-content {
    gap: 64px;
    width: min(calc(100% - 36px), var(--max));
    padding: 72px 0;
  }

  .lab-introduction,
  .lab-boundary {
    gap: 30px;
  }

  .lab-simulator-header {
    align-items: start;
    flex-direction: column;
  }

  .lab-simulator-header,
  .lab-ready .lab-scenario-panel,
  .lab-state-panel,
  .lab-control-panel,
  .lab-playback-panel,
  .lab-history-panel {
    padding: 22px;
  }

  .lab-scenario-controls,
  .lab-builder-controls {
    grid-template-columns: 1fr;
  }

  .lab-scenario-controls label,
  .lab-scenario-controls .lab-text-action,
  .lab-builder-controls label {
    grid-column: auto;
  }

  .lab-builder-plan {
    grid-template-columns: 1fr;
  }

  .lab-ready .lab-builder {
    margin: 22px 22px 0;
  }

  .lab-facts {
    grid-template-columns: 1fr;
  }

  .lab-static-sequence {
    margin: 0 22px 22px;
  }

  .lab-boundary {
    padding: 28px;
  }
}

@media (max-width: 380px) {
  .lab-state-heading,
  .lab-control-heading,
  .lab-history-heading,
  .lab-playback-heading,
  .lab-builder-plan-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .lab-playback-controls,
  .lab-builder-plan-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .lab-builder-plan-actions .lab-secondary-action {
    margin-left: 0;
  }

  .lab-history li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lab-action {
    transition: none;
  }

  .lab-history li.lab-history-current {
    animation: none;
  }
}