.riemann-controls form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.riemann-inputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.riemann-inputs label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.95rem;
}

.riemann-inputs input[type="text"],
.riemann-inputs input[type="number"],
.riemann-inputs select {
  width: 100%;
  padding: 0.45rem 0.55rem;
  font-size: 0.95rem;
}

.riemann-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
}

.riemann-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

.riemann-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.button.ghost {
  border: 1px solid var(--border-color, #d4d4d8);
  background: transparent;
  color: inherit;
}

.button.ghost:hover,
.button.ghost:focus-visible {
  background: #f3f4f6;
}

#err {
  min-height: 1.2rem;
  color: #b91c1c;
}

.riemann-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .riemann-grid {
    grid-template-columns: 1fr;
  }
}

canvas#graph {
  width: 100%;
  height: auto;
  border: 1px solid #e5e7eb;
  background: #f9fafb;
  border-radius: 8px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
  font-size: 0.9rem;
  align-items: center;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend .dot {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  display: inline-block;
}

.legend .dot.fn {
  background: #2563eb;
}

.legend .dot.approx {
  background: #0d9488;
}

.legend .dot.simp {
  background: #dc2626;
}

#result-summary {
  display: grid;
  gap: 10px;
}

#result-summary .kv {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 4px 8px;
  align-items: baseline;
}

#result-summary .mono {
  font-family: ui-monospace, Menlo, Consolas, monospace;
}

.examples-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

#examples-panel[hidden] {
  display: none;
}

.teacher-notes-list {
  padding-left: 20px;
}

.related-fallback {
  margin-top: 12px;
  padding-left: 20px;
}