.math-page .tool-shell {
  width: min(1240px, calc(100% - 40px));
}

.math-page .tool-hero {
  align-items: center;
}

.math-page .tool-panel {
  overflow: visible;
}

.math-page .tool-panel + .tool-panel {
  margin-top: 18px;
}

.math-intro {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.math-intro-item {
  padding: 14px;
  border: 1px solid var(--tool-line);
  border-radius: 10px;
  background: #f8f8f8;
}

.math-intro-item strong,
.math-intro-item span {
  display: block;
}

.math-intro-item strong {
  margin-bottom: 6px;
  font-size: 14px;
}

.math-intro-item span {
  color: var(--tool-muted);
  font-size: 13px;
  line-height: 1.55;
}

.math-form {
  display: grid;
  gap: 14px;
}

.math-field-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

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

.math-field-grid.four-columns {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.math-field-grid.five-columns {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.math-field-block {
  display: grid;
  gap: 7px;
}

.math-field-block > span,
.matrix-label {
  color: var(--tool-muted);
  font-size: 13px;
  font-weight: 600;
}

.math-input,
.math-select,
.matrix-input {
  width: 100%;
  border: 1px solid var(--tool-line-strong);
  border-radius: 9px;
  color: var(--tool-text);
  background: #fff;
  font: inherit;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.math-input,
.math-select {
  min-height: 44px;
  padding: 9px 12px;
}

.matrix-input {
  min-height: 210px;
  padding: 14px;
  resize: vertical;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.7;
}

.congruence-input {
  min-height: 145px;
}

.math-input:focus,
.math-select:focus,
.matrix-input:focus {
  border-color: var(--tool-primary);
  box-shadow: 0 0 0 1px var(--tool-text);
}

.math-mode-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
}

.math-mode-switch label {
  position: relative;
}

.math-mode-switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.math-mode-switch span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 13px;
  border: 1px solid var(--tool-line);
  border-radius: 999px;
  color: var(--tool-muted);
  background: #fff;
  cursor: pointer;
}

.math-mode-switch input:checked + span {
  color: #fff;
  border-color: var(--tool-primary);
  background: var(--tool-primary);
}

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

.math-actions .math-select {
  width: auto;
  min-width: 230px;
}

.math-status {
  min-height: 24px;
  padding: 4px 0;
  color: var(--tool-muted);
  font-size: 13px;
}

.math-status[hidden] {
  display: none;
}

.math-status.success {
  color: var(--tool-success);
}

.math-status.error {
  color: var(--tool-danger);
}

.math-status.working {
  color: #8a5a13;
}

.math-output-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.math-output-grid:empty {
  display: none;
}

.math-result-card {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--tool-line);
  border-radius: 10px;
  background: #fff;
}

.math-result-card.math-result-wide { grid-column: 1 / -1; }

.math-result-card h3 {
  margin: 0 0 10px;
  font-size: 15px;
}

.math-display {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  overflow: visible;
  padding: 9px 4px;
  color: var(--tool-text);
}

.math-display mjx-container {
  width: 100%;
  min-width: 0 !important;
  max-width: 100%;
  margin: 0.45em 0 !important;
}

.math-display mjx-container[display="true"] {
  text-align: left !important;
}

.math-result-note {
  margin: 9px 0 0;
  color: var(--tool-muted);
  font-size: 13px;
  line-height: 1.65;
}

.precision-note {
  padding: 13px 15px;
  border: 1px solid var(--tool-line);
  border-radius: 10px;
  color: var(--tool-muted);
  background: #f8f8f8;
  font-size: 13px;
  line-height: 1.7;
}

.precision-note strong {
  color: var(--tool-text);
}

.matrix-workspace {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  gap: 16px;
  align-items: start;
}

.matrix-controls {
  position: sticky;
  top: 16px;
}

.matrix-output {
  margin-top: 0;
  grid-template-columns: 1fr;
}

.matrix-output .math-result-card {
  overflow: visible;
}

.factor-equation {
  display: grid;
  grid-template-columns: minmax(0, auto) auto minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  padding: 10px 0;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 15px;
  line-height: 1.8;
}

.factor-source,
.factor-number {
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.factor-source { color: var(--tool-muted); }
.factor-list { min-width: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: 5px 7px; }
.factor-term { min-width: 0; display: inline-flex; align-items: baseline; gap: 2px; }
.factor-operator { color: var(--tool-muted); }
.factor-unresolved { padding: 2px 6px; border-radius: 6px; color: #8a5205; background: #fff7e6; }
.factor-unresolved small { margin-left: 5px; font-family: inherit; font-size: 10px; }

[hidden] {
  display: none !important;
}

@media (max-width: 900px) {
  .math-intro,
  .math-field-grid,
  .math-field-grid.four-columns,
  .math-field-grid.five-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .matrix-workspace {
    grid-template-columns: 1fr;
  }

  .matrix-controls {
    position: static;
  }
}

@media (max-width: 640px) {
  .math-intro,
  .math-field-grid,
  .math-field-grid.two-columns,
  .math-field-grid.four-columns,
  .math-field-grid.five-columns,
  .math-output-grid {
    grid-template-columns: 1fr;
  }

  .math-actions,
  .math-actions .math-select {
    width: 100%;
  }

  .factor-equation { grid-template-columns: 1fr; gap: 4px; }
  .factor-equals { display: none; }
}