/*
 * Shared Learning trainer UI.
 * Colors are semantic tokens generated from src/colors/tokens.json.
 */

.learning-trainer {
  display: grid;
  gap: 1.5rem;
}

.learning-trainer-widget {
  overflow: clip;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  background: var(--bg-primary);
}

.learning-settings {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

.difficulty-selector {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.difficulty-label {
  margin-right: 0.25rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
}

.difficulty-btn {
  min-height: 2.5rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
}

.difficulty-btn:hover,
.difficulty-btn:focus-visible {
  border-color: var(--skills-primary);
  color: var(--text-primary);
}

.difficulty-btn:focus-visible,
.answer-option:focus-visible,
.hint-btn:focus-visible,
.learning-toggle input:focus-visible + span,
.learning-related-card:focus-visible {
  outline: 3px solid var(--focus-ring-tools);
  outline-offset: 2px;
}

.difficulty-btn.active {
  border-color: var(--skills-primary);
  background: var(--skills-primary);
  color: var(--text-inverse);
}

.learning-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
}

.learning-toggle input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--skills-primary);
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-tertiary);
}

.stat-item {
  display: grid;
  gap: 0.15rem;
  justify-items: center;
  min-width: 0;
  padding: 0.8rem 0.4rem;
  border-right: 1px solid var(--border-light);
}

.stat-item:last-child {
  border-right: 0;
}

.stat-value {
  color: var(--skills-primary);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  overflow: hidden;
  max-width: 100%;
  color: var(--text-secondary);
  font-size: 0.75rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timer-warning {
  color: var(--alert-error-text);
}

.question-area,
.answer-section {
  padding: 1.25rem;
}

.question-area {
  border-bottom: 1px solid var(--border-light);
}

.question-prompt {
  margin: 0 0 1rem;
  color: var(--text-primary);
  font-size: 1.1rem;
  line-height: 1.4;
}

.question-content {
  min-height: 8rem;
  padding: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.puzzle-id {
  display: block;
  margin-top: 0.25rem;
  color: var(--text-tertiary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.65rem;
  text-align: right;
}

.generation-error {
  padding: 1rem;
  border: 1px solid var(--alert-error-border);
  border-radius: var(--border-radius);
  background: var(--alert-error-bg);
  color: var(--alert-error-text);
}

.hints-section {
  margin-top: 0.75rem;
}

.hint-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.5rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
}

.hint-btn:hover:not(:disabled) {
  border-color: var(--skills-border);
  background: var(--skills-bg);
  color: var(--skills-primary);
}

.hint-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.hint-icon {
  display: inline-grid;
  width: 1.25rem;
  height: 1.25rem;
  place-items: center;
  border-radius: 50%;
  background: var(--skills-primary);
  color: var(--text-inverse);
  font-weight: 700;
}

.hints-container {
  padding: 0 1rem;
  border: 1px solid var(--alert-info-border);
  border-radius: var(--border-radius);
  background: var(--alert-info-bg);
  color: var(--alert-info-text);
}

.hint-item {
  margin: 0;
  color: inherit;
}

.select-prompt {
  margin: 0 0 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.answers-container,
.answers-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

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

.answers-grid-6 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.answers-grid-8 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.answer-option {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  min-height: 3.5rem;
  padding: 0.8rem;
  border: 2px solid var(--answer-border);
  border-radius: var(--border-radius);
  background: var(--answer-bg);
  color: var(--text-primary);
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.answer-option:hover:not(.disabled) {
  border-color: var(--answer-hover-border);
  background: var(--answer-hover-bg);
}

.answer-option.selected {
  border-color: var(--answer-selected-border);
  background: var(--answer-selected-bg);
}

.answer-option.correct {
  border-color: var(--answer-correct-border);
  background: var(--answer-correct-bg);
}

.answer-option.incorrect {
  border-color: var(--answer-incorrect-border);
  background: var(--answer-incorrect-bg);
}

.answer-option.disabled {
  cursor: default;
}

.answer-option.disabled:not(.correct):not(.incorrect) {
  opacity: 0.58;
}

.answer-option.correct-reveal {
  box-shadow: 0 0 0 3px var(--answer-correct-border);
}

.answer-label,
.answer-letter {
  flex: 0 0 auto;
  color: var(--text-tertiary);
  font-size: 0.8rem;
  font-weight: 700;
}

.answer-value,
.answer-word,
.answer-statement,
.answer-number,
.answer-symmetry {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--text-primary);
  font-weight: 600;
}

.answer-option-wide {
  grid-column: 1 / -1;
}

.answer-option-shape {
  justify-content: center;
  min-height: 7rem;
  background: var(--pr-cell-bg);
}

.answer-option svg,
.answer-shape-content svg {
  display: block;
  max-width: 100%;
  max-height: 7rem;
}

.learning-action-footer {
  display: grid;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

.action-buttons,
.nav-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.nav-buttons {
  justify-content: flex-end;
}

.feedback-container {
  padding: 0 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
}

.feedback-container.correct {
  border-color: var(--alert-success-border);
  background: var(--alert-success-bg);
  color: var(--alert-success-text);
}

.feedback-container.incorrect {
  border-color: var(--alert-error-border);
  background: var(--alert-error-bg);
  color: var(--alert-error-text);
}

.feedback-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
}

.feedback-header svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.feedback-icon-correct {
  color: var(--alert-success-icon);
}

.feedback-icon-incorrect {
  color: var(--alert-error-icon);
}

.explanation-container {
  margin: 0 1.25rem;
  padding: 0 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
}

.explanation-container.correct {
  border-color: var(--alert-success-border);
  background: var(--alert-success-bg);
}

.explanation-container.incorrect {
  border-color: var(--alert-error-border);
  background: var(--alert-error-bg);
}

.explanation-title {
  margin: 0 0 0.5rem;
  color: var(--text-primary);
  font-size: 1rem;
}

.explanation-text {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--text-secondary);
  font: inherit;
  line-height: 1.6;
  white-space: pre-wrap;
}

.learn-more-link {
  display: inline-flex;
  margin-top: 0.75rem;
  color: var(--skills-primary);
  font-weight: 600;
}

.panel-revealable {
  overflow: hidden;
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
  transition: max-height 180ms ease, opacity 180ms ease, padding 180ms ease, margin 180ms ease;
}

.panel-revealable.is-open {
  max-height: 80rem;
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
  opacity: 1;
}

.is-invisible {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.learning-trainer .hidden {
  display: none;
}

.shake {
  animation: learning-shake 280ms ease-in-out;
}

@keyframes learning-shake {
  25% { transform: translateX(-0.3rem); }
  75% { transform: translateX(0.3rem); }
}

.adaptive-prompt {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin: 0 1.25rem 1rem;
  padding: 0.85rem;
  border: 1px solid var(--skills-border);
  border-radius: var(--border-radius);
  background: var(--skills-bg);
  color: var(--skills-text);
}

.adaptive-msg {
  flex: 1 1 14rem;
}

/* Shared generated-puzzle layouts */

.sequence-container,
.analogy-display,
.syllogism-display,
.spatial-display,
.chart-display,
.code-display-container,
.cipher-puzzle,
.ct-argument-display,
.ar-puzzle-display,
.word-problem {
  padding: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
}

.sequence-display,
.sequence-strip,
.analogy-grid,
.analogy-pair,
.spatial-sequence-display,
.spatial-sequence-container,
.paper-fold-container,
.spatial-blocks3d,
.spatial-views,
.spatial-shape-display,
.spatial-cube3d,
.spatial-cross-section,
.spatial-paper-display,
.spatial-shape-fitting {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.seq-number,
.sequence-item,
.analogy-word,
.spatial-sequence-item {
  display: inline-grid;
  min-width: 3.5rem;
  min-height: 3.5rem;
  padding: 0.55rem;
  place-items: center;
  border: 2px solid var(--skills-border);
  border-radius: var(--border-radius);
  background: var(--skills-bg);
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
}

.seq-unknown,
.sequence-item.unknown,
.spatial-sequence-item.unknown {
  border-style: dashed;
  border-color: var(--alert-warning-border);
  background: var(--alert-warning-bg);
  color: var(--alert-warning-text);
}

.analogy-arrow,
.analogy-connector,
.analogy-separator,
.sequence-arrow,
.spatial-sequence-arrow,
.spatial-shape-arrow,
.paper-arrow,
.cross-section-arrow,
.view-arrow,
.blocks3d-arrow {
  color: var(--text-secondary);
  font-weight: 700;
}

.premises-list,
.ct-premises,
.ar-constraints {
  display: grid;
  gap: 0.6rem;
}

.premise,
.ct-premise,
.ar-constraint {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  border-left: 3px solid var(--skills-primary);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.premise-number,
.ct-premise-number,
.ar-constraint-number {
  color: var(--skills-primary);
  font-weight: 700;
}

.conclusion-prompt,
.ct-prompt,
.ar-question,
.chart-question,
.rule-prompt,
.oddoneout-prompt,
.spatial-answer-prompt {
  margin-top: 0.9rem;
  padding: 0.75rem;
  border-left: 3px solid var(--skills-primary);
  border-radius: var(--border-radius);
  background: var(--skills-bg);
  color: var(--skills-text);
  font-weight: 600;
}

.therefore,
.unknown-conclusion,
.unknown-marker {
  color: var(--skills-primary);
  font-weight: 700;
}

.ct-argument,
.ar-scenario,
.problem-text,
.spatial-instruction,
.odd-word-instruction {
  margin: 0 0 0.9rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.matrix-grid,
.oddoneout-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(3.5rem, 1fr));
  gap: 0.5rem;
  max-width: 28rem;
  margin-inline: auto;
}

.matrix-grid-4 {
  grid-template-columns: repeat(4, minmax(3rem, 1fr));
}

.matrix-cell,
.oddoneout-cell {
  display: grid;
  min-width: 0;
  min-height: 5rem;
  place-items: center;
  border: 2px solid var(--border-default);
  border-radius: var(--border-radius);
  background: var(--pr-cell-bg);
}

.matrix-cell-unknown,
.matrix-cell.question-mark {
  border-style: dashed;
  border-color: var(--skills-primary);
  background: var(--skills-bg);
  color: var(--skills-primary);
  font-size: 1.5rem;
  font-weight: 700;
}

.matrix-cell svg,
.oddoneout-cell svg {
  display: block;
  max-width: 100%;
  max-height: 6rem;
}

.chart-container {
  overflow-x: auto;
  max-width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
}

.chart-container svg,
.chart-container canvas {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  color: var(--text-primary);
}

.data-table th,
.data-table td {
  padding: 0.6rem;
  border-bottom: 1px solid var(--border-light);
  text-align: left;
}

.data-table-header {
  background: var(--bg-tertiary);
}

.data-table-row-num,
.code-label,
.encoded-label,
.rule-desc,
.blocks-label,
.shape-label,
.paper-label,
.spatial-3d-label,
.state-label,
.view-label,
.cross-section-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.code-key {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.code-key-item,
.encoded-display,
.rule-display,
.rule-validation {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
}

.code-value,
.encoded-value,
.encoded-value code {
  color: var(--skills-primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 700;
}

.spatial-question-area,
.spatial-step-wrapper,
.paper-step-box,
.blocks3d-state,
.view-3d,
.view-2d,
.cross-section-shape,
.cross-section-result,
.shape-fitting-gap,
.fitting-piece {
  padding: 0.7rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
}

.spatial-question-area svg,
.spatial-display svg,
.spatial-blocks svg,
.spatial-cube-net svg,
.spatial-paper-display svg,
.spatial-cross-section svg,
.spatial-views svg,
.spatial-shape-fitting svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
}

.blocks3d-canvas,
.cross-section-canvas,
.threejs-container canvas {
  display: block;
  max-width: 100%;
  margin-inline: auto;
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
}

.threejs-container {
  position: relative;
  min-height: 18rem;
}

.threejs-hint,
.threejs-reset-btn {
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.8rem;
}

.threejs-reset-btn {
  cursor: pointer;
}

.cube-net-grid {
  display: grid;
  grid-template-columns: repeat(4, 2.5rem);
  grid-auto-rows: 2.5rem;
}

.cube-net-face {
  display: grid;
  place-items: center;
  border: 1px solid var(--cube-face-stroke);
  background: var(--cube-face-fill);
}

.cube-marker {
  fill: var(--cube-marker);
}

.block-top,
.cube-top-face {
  fill: var(--chart-color-1);
  stroke: var(--cube-face-stroke);
}

.block-front,
.cube-left-face {
  fill: var(--chart-color-6);
  stroke: var(--cube-face-stroke);
}

.block-right,
.cube-right-face {
  fill: var(--chart-color-2);
  stroke: var(--cube-face-stroke);
}

.paper-rect,
.paper-rect-folded {
  fill: var(--bg-primary);
  stroke: var(--border-dark);
}

.paper-rect-folded-top,
.gap-outline,
.result-shape-fill,
.shape-3d-body {
  fill: var(--skills-bg);
  stroke: var(--skills-primary);
}

.fold-line,
.fold-arrow-path,
.fold-arrow-head,
.view-block,
.piece-shape,
.sequence-shape-svg {
  fill: var(--chart-color-2);
  stroke: var(--skills-primary);
}

.paper-hole,
.paper-hole-punch,
.paper-hole-marker,
.paper-hole-punch-through,
.cutting-plane-fill {
  fill: var(--alert-error-icon);
  stroke: var(--alert-error-border);
}

/* Integrated educational content */

.learning-section {
  margin: 0;
  padding: 1.25rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  background: var(--bg-primary);
}

.learning-section > h2 {
  margin: 0 0 0.85rem;
  color: var(--text-primary);
  font-size: 1.35rem;
}

.learning-section p,
.learning-section li {
  color: var(--text-secondary);
  line-height: 1.7;
}

.learning-guide-entry-link {
  margin-top: 0.5rem;
}

.learning-guide-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.learning-guide-map-group {
  padding: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
}

.learning-guide-map-group h3 {
  margin: 0 0 0.5rem;
  color: var(--text-primary);
}

.learning-guide-map-group p {
  margin: 0 0 0.75rem;
  color: var(--text-secondary);
}

.learning-guide-map-group ol {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding-left: 1.4rem;
}

.learning-guide-map-group a {
  color: var(--link-tools-text);
}

.learning-guide-lesson {
  scroll-margin-top: 5rem;
}

.learning-guide-lesson-number {
  margin: 0 0 0.25rem;
  color: var(--text-tertiary);
  font-size: 0.8rem;
  font-weight: 600;
}

.learning-guide-lesson > h2 {
  margin-top: 0;
}

.learning-guide-example-explorer {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  background: var(--bg-secondary);
}

.learning-guide-example-picker {
  display: grid;
  grid-template-columns: auto minmax(12rem, 24rem);
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.learning-guide-example-picker label {
  color: var(--text-primary);
  font-weight: 600;
}

.learning-guide-example {
  padding: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
}

.learning-guide-example h3 {
  margin: 0 0 1rem;
  color: var(--text-primary);
}

.learning-guide-example .question-content {
  margin-bottom: 1rem;
}

.learning-guide-example .answer-option.disabled {
  cursor: default;
}

.learning-guide-example .learning-example-explanation p {
  margin-bottom: 0;
  white-space: pre-line;
}

.learning-concept-body {
  padding: 1rem;
}

.learning-concept-body > :first-child {
  margin-top: 0;
}

.learning-concept-body > :last-child {
  margin-bottom: 0;
}

.learning-formula {
  overflow-x: auto;
  padding: 0.75rem;
  border-left: 3px solid var(--skills-primary);
  border-radius: var(--border-radius);
  background: var(--skills-bg);
  color: var(--skills-text);
}

.learning-formula code {
  color: inherit;
  font-size: 0.95rem;
  white-space: pre-wrap;
}

.learning-mistakes {
  padding: 0.75rem 0.75rem 0.75rem 2rem;
  border-left: 3px solid var(--alert-warning-border);
  border-radius: var(--border-radius);
  background: var(--alert-warning-bg);
}

.learning-walkthrough {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
}

.learning-walkthrough h4 {
  margin-top: 0;
  color: var(--text-primary);
}

.learning-difficulty {
  display: inline-flex;
  margin-right: 0.4rem;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.learning-difficulty-easy {
  border-color: var(--alert-success-border);
  background: var(--alert-success-bg);
  color: var(--alert-success-text);
}

.learning-difficulty-medium {
  border-color: var(--alert-info-border);
  background: var(--alert-info-bg);
  color: var(--alert-info-text);
}

.learning-difficulty-hard,
.learning-difficulty-expert {
  border-color: var(--alert-warning-border);
  background: var(--alert-warning-bg);
  color: var(--alert-warning-text);
}

.learning-example-explanation {
  margin-top: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--alert-info-border);
  border-radius: var(--border-radius);
  background: var(--alert-info-bg);
  color: var(--alert-info-text);
}

.learning-example-explanation p {
  color: inherit;
}

.learning-table-wrap {
  overflow-x: auto;
}

.learning-table-wrap table {
  width: 100%;
  border-collapse: collapse;
}

.learning-table-wrap td {
  padding: 0.45rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.learning-privacy {
  margin-top: 1rem;
  padding: 0.75rem;
  border-left: 3px solid var(--alert-info-border);
  border-radius: var(--border-radius);
  background: var(--alert-info-bg);
  color: var(--alert-info-text) !important;
}

.learning-related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.learning-related-card {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 3.5rem;
  padding: 0.8rem;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
  text-decoration: none;
}

.learning-related-card:hover {
  border-color: var(--skills-border);
  background: var(--skills-bg);
  color: var(--skills-primary);
}

.learning-related-card svg {
  flex: 0 0 auto;
  width: 1.35rem;
  height: 1.35rem;
  color: var(--skills-icon);
}

@media (max-width: 720px) {
  .learning-settings {
    align-items: stretch;
    flex-direction: column;
  }

  .stats-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat-item:nth-child(2) {
    border-right: 0;
  }

  .stat-item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--border-light);
  }

  .answers-container,
  .answers-grid,
  .answers-grid-4,
  .answers-grid-6,
  .answers-grid-8,
  .learning-related-grid,
  .learning-guide-map {
    grid-template-columns: 1fr;
  }

  .learning-guide-example-picker {
    grid-template-columns: 1fr;
  }

  .matrix-grid {
    grid-template-columns: repeat(3, minmax(2.6rem, 1fr));
  }

  .matrix-grid-4 {
    grid-template-columns: repeat(4, minmax(2.2rem, 1fr));
  }

  .matrix-cell,
  .oddoneout-cell {
    min-height: 3.7rem;
  }

  .nav-buttons {
    justify-content: stretch;
  }

  .nav-buttons .btn,
  .action-buttons .btn {
    flex: 1 1 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .panel-revealable,
  .difficulty-btn,
  .answer-option {
    transition: none;
  }

  .shake {
    animation: none;
  }
}

@media print {
  .learning-settings,
  .stats-bar,
  .hints-section,
  .learning-action-footer,
  .share-row {
    display: none;
  }

  .learning-trainer-widget,
  .learning-section,
  .learning-guide-lesson,
  .learning-guide-example {
    break-inside: avoid;
    border-color: var(--border-default);
    box-shadow: none;
  }
}