.engineering-lab-page {
  --lab-ink: #061225;
  --lab-line: #284866;
  --lab-cyan: #83e8fb;
  --lab-muted: #b8c8dc;
}

.engineering-lab-page [hidden] {
  display: none !important;
}
.engineering-lab-page .page-hero-clean {
  padding-top: 3rem;
}
.engineering-lab-page :is(a, button, input, summary):focus-visible {
  outline: 3px solid var(--lab-cyan);
  outline-offset: 4px;
}
.engineering-lab-page .navbar-toggler {
  min-height: 44px;
  border-color: #829ab7;
}
.engineering-lab-page .navbar-toggler-icon {
  filter: brightness(0) invert(1);
}
.engineering-lab-page .lab-skip {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 1200;
  padding: 0.75rem 1rem;
  background: #fff;
  color: #061225;
}
.engineering-lab-page .lab-skip:focus {
  top: 0.5rem;
}
.engineering-lab-page :is(#hardware, #trade-study) {
  scroll-margin-top: 5rem;
}
.engineering-lab-page .lab-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.engineering-lab-page .lab-source-note {
  color: var(--lab-muted);
  font-size: 0.8rem;
}
.engineering-lab-page :is(.lab-source-note, .lab-hardware-card, .lab-method) a {
  color: var(--lab-cyan);
  text-underline-offset: 0.2em;
}
.engineering-lab-page .eng-table {
  --bs-table-bg: transparent;
  --bs-table-color: #c5d3e4;
  --bs-table-border-color: #29435e;
}
.engineering-lab-page .lab-hardware-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}
.engineering-lab-page .lab-hardware-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--lab-line);
  border-radius: 16px;
  background: var(--lab-ink);
}
.engineering-lab-page .lab-hardware-card img {
  display: block;
  width: 100%;
  height: 300px;
  object-fit: contain;
  background: #e9eef4;
}
.engineering-lab-page .lab-hardware-card:nth-child(2) img {
  background: #081c34;
}
.engineering-lab-page .lab-hardware-card figcaption {
  padding: 1.4rem;
}
.engineering-lab-page .lab-hardware-card h3 {
  margin: 0.5rem 0 0.75rem;
  font-size: 1.35rem;
}
.engineering-lab-page .lab-hardware-card p {
  color: var(--lab-muted);
  line-height: 1.65;
}
.engineering-lab-page .lab-history {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}
.engineering-lab-page .lab-history a {
  padding: 1rem;
  border-left: 2px solid var(--lab-cyan);
  background: #09182b;
  color: var(--lab-muted);
  text-decoration: none;
}
.engineering-lab-page .lab-history strong {
  display: block;
  margin-bottom: 0.4rem;
  font-family: "Space Mono", monospace;
  color: var(--lab-cyan);
}
.engineering-lab-page .lab-history a:hover {
  background: #102642;
}
.engineering-lab-page .lab-study {
  border-block: 1px solid var(--lab-line);
  background: linear-gradient(130deg, #071b33, #050e1c 75%);
}
.engineering-lab-page .lab-intro {
  max-width: 900px;
  color: #c5d4e7;
  line-height: 1.65;
}
.engineering-lab-page .lab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 1.2rem;
  align-items: start;
  margin-top: 1.8rem;
}
.engineering-lab-page .lab-inputs,
.engineering-lab-page .lab-results-column {
  display: grid;
  min-width: 0;
  gap: 1rem;
}
.engineering-lab-page .lab-panel {
  min-width: 0;
  margin: 0;
  padding: clamp(1rem, 2.2vw, 1.5rem);
  border: 1px solid var(--lab-line);
  border-radius: 14px;
  background: #071326;
}
.engineering-lab-page .lab-panel legend {
  float: none;
  width: auto;
  margin: 0;
  padding: 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 600;
}
.engineering-lab-page .lab-panel legend span {
  margin-right: 0.55rem;
  color: var(--lab-cyan);
  font-family: "Space Mono", monospace;
  font-size: 0.8rem;
}
.engineering-lab-page .lab-help {
  color: var(--lab-muted);
  font-size: 0.82rem;
  line-height: 1.6;
}
.engineering-lab-page .lab-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}
.engineering-lab-page .lab-field {
  display: grid;
  align-content: start;
  min-width: 0;
  gap: 0.35rem;
}
.engineering-lab-page .lab-field-wide {
  grid-column: 1 / -1;
}
.engineering-lab-page .lab-field label {
  color: #e4edf9;
  font-size: 0.9rem;
}
.engineering-lab-page .lab-field label span {
  color: var(--lab-cyan);
  font-family: "Space Mono", monospace;
}
.engineering-lab-page .lab-field input {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  border: 1px solid #536c8c;
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
  color: #fff;
  background: #0e233c;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  color-scheme: dark;
}
.engineering-lab-page .lab-field input[aria-invalid="true"] {
  border-color: #ffb4a5;
}
.engineering-lab-page .lab-error {
  color: #ffc0b3;
  line-height: 1.4;
}
.engineering-lab-page .lab-error:empty {
  display: none;
}
.engineering-lab-page .lab-results {
  border-top: 3px solid var(--lab-cyan);
}
.engineering-lab-page .lab-results h3 {
  font-size: 1.65rem;
}
.engineering-lab-page .lab-status {
  min-height: 3rem;
  color: #c6dcf2;
  line-height: 1.5;
  font-size: 0.9rem;
}
.engineering-lab-page .lab-status[data-invalid="true"] {
  color: #ffc0b3;
}
.engineering-lab-page .lab-readout-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.3rem 0;
}
.engineering-lab-page .lab-readout-grid > div {
  min-width: 0;
  padding: 0.9rem;
  border-left: 2px solid #335e82;
  background: #0b1d34;
}
.engineering-lab-page .lab-readout-grid span {
  display: block;
  color: var(--lab-muted);
  font-size: 0.78rem;
}
.engineering-lab-page .lab-readout-grid strong {
  display: block;
  margin: 0.3rem 0;
  color: #effaff;
  font-size: clamp(1.2rem, 2.3vw, 1.8rem);
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}
.engineering-lab-page .lab-readout-grid small {
  display: block;
  color: var(--lab-muted);
  font-size: 0.75rem;
}
.engineering-lab-page .lab-readout-grid [data-exceeded="true"] {
  color: #ffc0b3;
}
.engineering-lab-page .lab-meter-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 1rem 0 0.3rem;
  color: #dce8f7;
  font-size: 0.83rem;
}
.engineering-lab-page .lab-meter-row span {
  font-variant-numeric: tabular-nums;
}
.engineering-lab-page meter {
  display: block;
  width: 100%;
  height: 1rem;
  margin-bottom: 0.75rem;
  accent-color: #79def2;
}
.engineering-lab-page meter::-webkit-meter-bar {
  border: 0;
  background: #263b53;
  border-radius: 4px;
}
.engineering-lab-page meter::-webkit-meter-optimum-value {
  background: #79def2;
  border-radius: 4px;
}
.engineering-lab-page meter::-moz-meter-bar {
  background: #79def2;
}
.engineering-lab-page .lab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}
.engineering-lab-page .lab-actions button {
  min-height: 44px;
}
.engineering-lab-page .lab-method {
  color: var(--lab-muted);
  font-size: 0.86rem;
  line-height: 1.65;
}
.engineering-lab-page .lab-method summary {
  min-height: 28px;
  color: #e6f1ff;
  cursor: pointer;
  font-weight: 600;
}
.engineering-lab-page .lab-method dl {
  margin-top: 1rem;
}
.engineering-lab-page .lab-method dt {
  margin-top: 0.85rem;
  color: #dbeafd;
}
.engineering-lab-page .lab-method dd {
  margin: 0;
}
.engineering-lab-page .lab-offline {
  padding: 1rem;
  border-left: 2px solid var(--lab-cyan);
  color: #d3e0ed;
}

@media (max-width: 991px) {
  .engineering-lab-page .lab-layout {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .engineering-lab-page .lab-hardware-grid,
  .engineering-lab-page .lab-history {
    grid-template-columns: 1fr;
  }
  .engineering-lab-page .lab-hardware-card img {
    height: 260px;
  }
  .engineering-lab-page .lab-fields {
    gap: 0.8rem;
  }
}
@media (max-width: 380px) {
  .engineering-lab-page .lab-fields,
  .engineering-lab-page .lab-readout-grid {
    grid-template-columns: 1fr;
  }
}