/* Accessible local MathJax/SVG rendering and STEM laboratory presentation. */
mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding-block: 0.08rem;
  vertical-align: middle;
  -webkit-overflow-scrolling: touch;
}

mjx-container[display="true"] {
  margin: 0.8rem 0;
  padding: 0.55rem 0.35rem;
  text-align: center;
}

mjx-container svg {
  max-width: none;
}

.math-derivation {
  border-left: 4px solid var(--accent, #0d766e);
  margin: 0.8rem 0;
  padding: 0.7rem 0.9rem;
}

.math-derivation > * + * {
  margin-top: 0.45rem;
}

.stem-tool-help {
  background: #f3f8f7;
  border: 1px solid #d8e9e6;
  border-radius: 0.8rem;
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
}

.stem-expression-list,
.stem-data-input {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  min-height: 7rem;
  resize: vertical;
}

.graph-controls-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: minmax(15rem, 2fr) repeat(4, minmax(7rem, 1fr));
}

.graph-controls-grid label:first-child {
  grid-row: span 2;
}

.graph-stage {
  margin-top: 1rem;
  overflow-x: auto;
}

.graph-stage canvas {
  background: #fff;
  border: 1px solid #dfe6e8;
  border-radius: 0.75rem;
  display: block;
  max-width: 100%;
  min-height: 340px;
  width: 100%;
}

.graph-readout {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  margin-top: 0.9rem;
}

.graph-summary-card,
.solver-summary-card,
.external-tool-card {
  background: #f8fbfb;
  border: 1px solid #dfe9e8;
  border-radius: 0.75rem;
  padding: 0.8rem;
}

.stem-table-wrap {
  max-height: 24rem;
  overflow: auto;
}

.stem-data-table {
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  width: 100%;
}

.stem-data-table th,
.stem-data-table td {
  border-bottom: 1px solid #e2e8ea;
  padding: 0.45rem 0.55rem;
  text-align: right;
}

.stem-data-table th:first-child,
.stem-data-table td:first-child {
  text-align: left;
}

.stem-solver-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}

.stem-derivation-steps {
  counter-reset: derivation-step;
  list-style: none;
  padding: 0;
}

.stem-derivation-steps li {
  counter-increment: derivation-step;
  margin: 0.6rem 0;
  padding-left: 2.1rem;
  position: relative;
}

.stem-derivation-steps li::before {
  background: #0d766e;
  border-radius: 50%;
  color: #fff;
  content: counter(derivation-step);
  font-size: 0.78rem;
  height: 1.45rem;
  left: 0;
  line-height: 1.45rem;
  position: absolute;
  text-align: center;
  top: 0.08rem;
  width: 1.45rem;
}

.external-tool-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.external-tool-card a {
  font-weight: 700;
}

@media (max-width: 860px) {
  .graph-controls-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .graph-controls-grid label:first-child {
    grid-column: 1 / -1;
    grid-row: auto;
  }
}

@media (max-width: 540px) {
  .graph-controls-grid {
    grid-template-columns: 1fr;
  }
  mjx-container[display="true"] {
    text-align: left;
  }
}