/* Тренажёр сокращения дробей. Профиль tokens-only. Все селекторы под .app--fraction-reduction. */
.app--fraction-reduction {
  position: relative;
  max-width: 56rem;
  margin: 0 auto;
  padding: var(--space-2) var(--space-4) var(--space-8);
  font-family: var(--font-body);
  color: var(--text);
}

.app--fraction-reduction .fr-confetti,
.app--fraction-reduction .trainer-quiz-confetti {
  pointer-events: none;
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 40;
}

.app--fraction-reduction .fr-confetti .cp,
.app--fraction-reduction .trainer-quiz-confetti .cp {
  position: absolute;
  top: -12px;
  border-radius: 2px;
  animation-name: fr-confetti-fall;
  animation-timing-function: ease-in;
  animation-fill-mode: forwards;
}

@keyframes fr-confetti-fall {
  to {
    transform: translateY(110vh) rotate(480deg);
    opacity: 0;
  }
}

.app--fraction-reduction [hidden] {
  display: none !important;
}

.app--fraction-reduction .fr-exit {
  margin-bottom: var(--space-2);
}

.app--fraction-reduction .fr-workspace {
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  box-sizing: border-box;
}

.app--fraction-reduction .fr-topbar {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.app--fraction-reduction .fr-topbar__meta {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--text-muted);
}

.app--fraction-reduction .fr-back,
.app--fraction-reduction .fr-topics,
.app--fraction-reduction .fr-start,
.app--fraction-reduction .fr-check,
.app--fraction-reduction .fr-next,
.app--fraction-reduction .fr-idle-start,
.app--fraction-reduction .fr-irreducible,
.app--fraction-reduction .fr-help-next,
.app--fraction-reduction .fr-help-full,
.app--fraction-reduction .fr-help-continue,
.app--fraction-reduction .fr-skip,
.app--fraction-reduction .fr-key {
  min-height: 48px;
  min-width: 44px;
  border-radius: var(--radius-md);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
}

.app--fraction-reduction .fr-back,
.app--fraction-reduction .fr-topics,
.app--fraction-reduction .fr-skip,
.app--fraction-reduction .fr-help-close {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.app--fraction-reduction .fr-start,
.app--fraction-reduction .fr-check,
.app--fraction-reduction .fr-next,
.app--fraction-reduction .fr-idle-start,
.app--fraction-reduction .fr-help-continue {
  border: 0;
  background: var(--trainer-primary, var(--primary));
  color: #fff;
}

.app--fraction-reduction .fr-irreducible,
.app--fraction-reduction .fr-help-next,
.app--fraction-reduction .fr-help-full {
  border: 1px solid var(--trainer-primary, var(--primary));
  background: var(--surface);
  color: var(--trainer-primary, var(--primary));
}

.app--fraction-reduction .fr-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.app--fraction-reduction .fr-tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-muted, #f7f4ef);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  font: inherit;
}

.app--fraction-reduction .fr-tab.is-active {
  border-color: var(--trainer-primary, var(--primary));
  background: var(--trainer-primary-subtle, rgba(1, 105, 111, 0.08));
}

.app--fraction-reduction .fr-tab__title {
  display: block;
  font-weight: 800;
}

.app--fraction-reduction .fr-tab__sub {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.app--fraction-reduction .fr-config,
.app--fraction-reduction .fr-idle {
  display: grid;
  gap: var(--space-4);
}

.app--fraction-reduction .fr-config-title,
.app--fraction-reduction .fr-idle-title,
.app--fraction-reduction .fr-howto__title,
.app--fraction-reduction .fr-success-title,
.app--fraction-reduction .fr-help-title,
.app--fraction-reduction .fr-dialog-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xl);
}

.app--fraction-reduction .fr-config-lead,
.app--fraction-reduction .fr-idle-lead,
.app--fraction-reduction .fr-howto__list,
.app--fraction-reduction .fr-success-desc,
.app--fraction-reduction .fr-help-text,
.app--fraction-reduction .fr-dialog-text {
  margin: 0;
  color: var(--text-muted);
}

.app--fraction-reduction .fr-levels {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}

.app--fraction-reduction .fr-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  min-height: 44px;
  padding: var(--space-3);
  border: 1px solid var(--trainer-border, var(--border));
  border-radius: var(--trainer-radius-control, var(--radius-md));
  background: var(--surface);
  box-shadow: var(--trainer-shadow-card, var(--shadow-md));
  cursor: pointer;
  text-align: left;
  font: inherit;
  transition:
    transform var(--trainer-transition-fast, var(--transition, 180ms ease)),
    box-shadow var(--trainer-transition-fast, var(--transition, 180ms ease)),
    border-color var(--trainer-transition-fast, var(--transition, 180ms ease)),
    background var(--trainer-transition-fast, var(--transition, 180ms ease));
}

.app--fraction-reduction .fr-card.is-active {
  border-color: var(--trainer-primary, var(--primary));
  background: var(--trainer-primary-subtle, rgba(1, 105, 111, 0.08));
  box-shadow:
    var(--trainer-shadow-card, var(--shadow-md)),
    0 0 0 2px var(--trainer-primary-subtle, rgba(1, 105, 111, 0.16));
}

.app--fraction-reduction .fr-card-title {
  font-weight: 800;
}

.app--fraction-reduction .fr-card-hint,
.app--fraction-reduction .fr-card-example {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.app--fraction-reduction .fr-start--config,
.app--fraction-reduction .fr-idle-start {
  width: 100%;
  max-width: 20rem;
  height: 56px;
}

.app--fraction-reduction .fr-howto__list {
  padding-left: 1.25rem;
  display: grid;
  gap: var(--space-2);
}

.app--fraction-reduction .fr-solve-head,
.app--fraction-reduction .fr-progress-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: center;
  flex-wrap: wrap;
}

.app--fraction-reduction .fr-badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 var(--space-2);
  border-radius: 999px;
  background: var(--trainer-primary-subtle, rgba(1, 105, 111, 0.08));
  font-weight: 800;
  font-size: var(--text-sm);
}

.app--fraction-reduction .fr-step-now {
  font-weight: 800;
  font-size: var(--text-sm);
}

.app--fraction-reduction .fr-progress {
  height: 8px;
  margin: var(--space-2) 0 var(--space-3);
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.app--fraction-reduction .fr-progress-fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--trainer-primary, var(--primary));
  transition: width 180ms ease;
}

.app--fraction-reduction .fr-steps {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
  display: none;
  gap: var(--space-2);
}

.app--fraction-reduction .fr-step {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  min-height: 32px;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.app--fraction-reduction .fr-step.is-active {
  color: var(--text);
  font-weight: 700;
}

.app--fraction-reduction .fr-step.is-done {
  color: var(--trainer-success, #437a22);
}

.app--fraction-reduction .fr-step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--border);
  font-size: var(--text-xs);
  font-weight: 800;
  flex: 0 0 auto;
}

.app--fraction-reduction .fr-step.is-active .fr-step-num {
  background: var(--trainer-primary, var(--primary));
  color: #fff;
}

.app--fraction-reduction .fr-step.is-done .fr-step-num {
  background: var(--trainer-success, #437a22);
  color: #fff;
}

.app--fraction-reduction .fr-solve-layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 0;
}

.app--fraction-reduction .fr-col-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 0;
}

.app--fraction-reduction .fr-history {
  list-style: none;
  margin: 0 0 var(--space-2);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem 0.5rem;
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  max-width: 100%;
}

.app--fraction-reduction .fr-history-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--text-muted);
  font-weight: 700;
}

.app--fraction-reduction .fr-mini {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.05;
}

.app--fraction-reduction .fr-mini-bar {
  width: 100%;
  min-width: 1.1rem;
  height: 2px;
  background: currentColor;
}

.app--fraction-reduction .fr-fraction {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.app--fraction-reduction .fr-fraction-bar {
  width: 100%;
  min-width: 3.5rem;
  height: 4px;
  margin: 0.15rem 0;
  background: currentColor;
}

.app--fraction-reduction .fr-work {
  width: min(100%, 22rem);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.app--fraction-reduction .fr-prompt-row,
.app--fraction-reduction .fr-input-wrap,
.app--fraction-reduction .fr-division,
.app--fraction-reduction .fr-feedback,
.app--fraction-reduction .fr-help-link-wrap {
  width: 100%;
}

.app--fraction-reduction .fr-prompt-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.75rem;
  margin: 0 0 var(--space-3);
}

.app--fraction-reduction .fr-prompt-row:has(.fr-irreducible:not([hidden])) {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  justify-items: stretch;
}

.app--fraction-reduction .fr-prompt {
  margin: 0;
  font-size: var(--text-lg);
  line-height: 1.3;
  text-align: center;
}

.app--fraction-reduction .fr-prompt-row:has(.fr-irreducible:not([hidden])) .fr-prompt {
  text-align: left;
}

.app--fraction-reduction .fr-prompt-row .fr-irreducible {
  justify-self: end;
  width: auto;
  min-height: 44px;
  padding: 0.45rem 0.9rem;
  white-space: nowrap;
}

.app--fraction-reduction .fr-label,
.app--fraction-reduction .fr-division-label {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: 700;
  text-align: left;
}

.app--fraction-reduction .fr-input-wrap,
.app--fraction-reduction .fr-division {
  margin-bottom: var(--space-2);
}

.app--fraction-reduction .fr-input,
.app--fraction-reduction .fr-calc-input {
  width: 100%;
  min-height: 48px;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  text-align: center;
  font: inherit;
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--surface);
}

.app--fraction-reduction .fr-input:focus,
.app--fraction-reduction .fr-calc-input:focus,
.app--fraction-reduction .fr-tab:focus-visible,
.app--fraction-reduction .fr-key:focus-visible,
.app--fraction-reduction .fr-check:focus-visible,
.app--fraction-reduction .fr-start:focus-visible,
.app--fraction-reduction .fr-help-link:focus-visible,
.app--fraction-reduction .fr-irreducible:focus-visible,
.app--fraction-reduction .fr-card:focus-visible {
  outline: 2px solid var(--trainer-primary, var(--primary));
  outline-offset: 2px;
}

.app--fraction-reduction .fr-calc-input.is-ok {
  border-color: var(--trainer-success, #437a22);
}

.app--fraction-reduction .fr-calc-input.is-bad {
  border-color: var(--trainer-error, #a12c7b);
}

.app--fraction-reduction .fr-division-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.app--fraction-reduction .fr-calc-input {
  width: 4.5rem;
  flex: 0 0 4.5rem;
}

.app--fraction-reduction .fr-feedback {
  min-height: 1.25rem;
  margin: var(--space-2) 0 0;
}

.app--fraction-reduction .fr-feedback.is-empty {
  display: none;
}

.app--fraction-reduction .fr-feedback.is-bad {
  color: var(--trainer-error, #a12c7b);
}

.app--fraction-reduction .fr-feedback.is-ok {
  color: var(--trainer-success, #437a22);
}

.app--fraction-reduction .fr-help-link-wrap {
  display: flex;
  justify-content: center;
  margin-top: var(--space-2);
}

.app--fraction-reduction .fr-help-link {
  min-height: 44px;
  width: auto;
  max-width: 100%;
  padding: 0.35rem 0.75rem;
  border: 0;
  background: transparent;
  font-weight: 600;
  color: var(--trainer-primary, var(--primary));
  cursor: pointer;
}

.app--fraction-reduction .fr-test-notice {
  margin-top: var(--space-2);
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.app--fraction-reduction .fr-success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--trainer-success, #437a22);
  color: #fff;
  font-size: 2rem;
}

.app--fraction-reduction .fr-equation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: 1.75rem;
  font-weight: 800;
}

.app--fraction-reduction .fr-next {
  width: min(100%, 20rem);
  height: 56px;
}

.app--fraction-reduction .fr-solve-dock {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 0.5rem 0 max(0.5rem, env(safe-area-inset-bottom, 0px));
  position: sticky;
  bottom: 0;
  z-index: 6;
  box-shadow: 0 -8px 24px color-mix(in srgb, var(--text) 6%, transparent);
}

.app--fraction-reduction .fr-dock-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.5rem;
}

.app--fraction-reduction .fr-dock-actions .fr-check {
  flex: 1 1 8rem;
  min-width: 0;
  width: auto;
  height: 48px;
}

.app--fraction-reduction .fr-dock-actions .fr-skip {
  flex: 1 1 100%;
  width: auto;
  margin: 0;
  height: 44px;
}

.app--fraction-reduction .fr-numpad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  width: 100%;
}

.app--fraction-reduction .fr-key {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  min-height: 52px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--trainer-primary, var(--primary)) 12%, var(--border));
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-display, var(--font-body));
  font-weight: 900;
  font-size: 1.35rem;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--trainer-primary, var(--primary)) 72%, var(--text));
  transition:
    transform 130ms ease,
    background 130ms ease,
    border-color 130ms ease,
    box-shadow 130ms ease;
}

.app--fraction-reduction .fr-key:active {
  transform: scale(0.96);
  box-shadow: none;
}

.app--fraction-reduction .fr-key--del {
  flex-direction: column;
  gap: 0;
  font-size: 0.72rem;
  line-height: 1.05;
  font-weight: 700;
  color: var(--text-muted);
}

.app--fraction-reduction .fr-key-del__icon {
  font-size: 1.15rem;
  line-height: 1;
}

.app--fraction-reduction .fr-key-del__label {
  font-size: 0.62rem;
  font-weight: 700;
}

.app--fraction-reduction .fr-key--ok {
  background: var(--trainer-success, #437a22);
  border-color: var(--trainer-success, #437a22);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.app--fraction-reduction .fr-help {
  width: 100%;
}

.app--fraction-reduction .fr-help-card {
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.app--fraction-reduction .fr-help-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
}

.app--fraction-reduction .fr-help-close {
  min-width: 44px;
  min-height: 44px;
}

.app--fraction-reduction .fr-help-math {
  margin: var(--space-3) 0;
  display: grid;
  gap: var(--space-2);
  text-align: left;
  font-variant-numeric: tabular-nums;
}

.app--fraction-reduction .fr-help-pill {
  display: inline-block;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--trainer-primary-subtle, rgba(1, 105, 111, 0.08));
  font-weight: 700;
}

.app--fraction-reduction .fr-help-actions {
  display: grid;
  gap: var(--space-2);
}

.app--fraction-reduction .fr-summary {
  text-align: center;
}

.app--fraction-reduction .fr-summary-score {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin: 0;
}

.app--fraction-reduction .fr-summary-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-4) 0;
}

.app--fraction-reduction .fr-summary-stats div {
  margin: 0;
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.app--fraction-reduction .fr-summary-stats dt {
  color: var(--text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
}

.app--fraction-reduction .fr-summary-stats dd {
  margin: 0.25rem 0 0;
  font-weight: 800;
  font-size: var(--text-lg);
}

.app--fraction-reduction .fr-summary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.app--fraction-reduction .fr-overlay,
.app--fraction-reduction .fr-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(40, 37, 29, 0.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 50;
}

.app--fraction-reduction .fr-help.is-modal {
  position: fixed;
  inset: auto 0 0;
  z-index: 60;
  width: 100%;
  display: flex;
  justify-content: center;
}

.app--fraction-reduction .fr-dialog,
.app--fraction-reduction .fr-help.is-modal .fr-help-card {
  width: min(100%, 28rem);
  margin: 0;
  padding: var(--space-4);
  border-radius: 20px 20px 0 0;
  background: var(--surface);
}

.app--fraction-reduction .fr-dialog-actions {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.app--fraction-reduction .fr-input.is-active,
.app--fraction-reduction .fr-calc-input.is-active {
  border-color: var(--trainer-primary, var(--primary));
}

@media (min-width: 680px) {
  .app--fraction-reduction .fr-levels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .app--fraction-reduction .fr-config {
    grid-template-columns: minmax(0, 1.4fr) minmax(12rem, 0.8fr);
    align-items: start;
  }

  .app--fraction-reduction .fr-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .app--fraction-reduction .fr-step-now {
    display: none;
  }

  .app--fraction-reduction .fr-solve-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 0.75rem;
    align-items: start;
    max-width: 48rem;
    margin-inline: auto;
  }

  .app--fraction-reduction .fr-work {
    width: min(100%, 30rem);
  }

  .app--fraction-reduction .fr-fraction {
    font-size: 2.75rem;
  }

  .app--fraction-reduction .fr-solve-dock {
    position: sticky;
    top: 4.5rem;
    bottom: auto;
    border-top: none;
    border-left: 1px solid var(--border);
    padding: 0 0 0 0.75rem;
    box-shadow: none;
    align-self: start;
  }

  .app--fraction-reduction .fr-overlay,
  .app--fraction-reduction .fr-backdrop {
    align-items: center;
  }

  .app--fraction-reduction .fr-help.is-modal {
    inset: 0;
    align-items: center;
  }

  .app--fraction-reduction .fr-dialog,
  .app--fraction-reduction .fr-help.is-modal .fr-help-card {
    border-radius: var(--radius-lg);
  }
}

@media (min-width: 1100px) {
  .app--fraction-reduction .fr-solve-layout {
    grid-template-columns: minmax(0, 1fr) 240px;
  }

  .app--fraction-reduction .fr-solve-dock {
    top: 5.5rem;
  }
}

@media (max-width: 679px) {
  .app--fraction-reduction .fr-tab__sub {
    display: none;
  }

  .app--fraction-reduction .fr-workspace {
    padding: var(--space-3);
  }

  .app--fraction-reduction .fr-solve-head {
    margin-bottom: 0;
  }

  .app--fraction-reduction .fr-progress {
    margin-bottom: var(--space-2);
  }

  .app--fraction-reduction .fr-prompt {
    font-size: var(--text-base);
  }

  .app--fraction-reduction .fr-prompt-row .fr-irreducible {
    padding: 0.4rem 0.7rem;
    font-size: var(--text-sm);
  }

  .app--fraction-reduction .fr-dock-actions {
    flex-wrap: nowrap;
    gap: 0.4rem;
  }

  .app--fraction-reduction .fr-dock-actions .fr-check,
  .app--fraction-reduction .fr-dock-actions .fr-skip {
    flex: 1 1 0;
    min-width: 0;
    min-height: 44px;
    height: 44px;
    padding-inline: 0.5rem;
    white-space: nowrap;
  }

  .app--fraction-reduction .fr-test-notice {
    margin-top: var(--space-1);
    font-size: var(--text-xs);
  }

  .app--fraction-reduction .fr-numpad {
    gap: 4px;
  }

  .app--fraction-reduction .fr-key {
    height: 44px;
    min-height: 44px;
    font-size: 1.15rem;
    border-radius: 10px;
  }

  .app--fraction-reduction .fr-key-del__label {
    display: none;
  }
}

@media (max-width: 360px) {
  .app--fraction-reduction .fr-tab__icon {
    display: none;
  }
}

@media (hover: hover) and (pointer: fine) {
  .app--fraction-reduction .fr-card:hover {
    border-color: var(--trainer-primary, var(--primary));
    background: var(--trainer-primary-subtle, rgba(1, 105, 111, 0.08));
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .app--fraction-reduction .fr-card.is-active:hover {
    box-shadow:
      var(--shadow-md),
      0 0 0 2px var(--trainer-primary-subtle, rgba(1, 105, 111, 0.16));
  }

  .app--fraction-reduction .fr-tab:hover:not(.is-active) {
    background: var(--surface);
    border-color: color-mix(in srgb, var(--trainer-primary, var(--primary)) 35%, var(--border));
  }

  .app--fraction-reduction .fr-start:hover,
  .app--fraction-reduction .fr-check:hover,
  .app--fraction-reduction .fr-next:hover,
  .app--fraction-reduction .fr-idle-start:hover {
    background: var(--trainer-primary-hover, var(--primary-h, #0c4e54));
  }

  .app--fraction-reduction .fr-irreducible:hover,
  .app--fraction-reduction .fr-help-next:hover,
  .app--fraction-reduction .fr-help-full:hover,
  .app--fraction-reduction .fr-help-link:hover {
    background: var(--trainer-primary-subtle, rgba(1, 105, 111, 0.08));
  }

  .app--fraction-reduction .fr-key:hover {
    background: var(--trainer-primary-subtle, rgba(1, 105, 111, 0.08));
    border-color: color-mix(in srgb, var(--trainer-primary, var(--primary)) 22%, var(--border));
    transform: scale(1.04);
  }

  .app--fraction-reduction .fr-key--ok:hover {
    background: color-mix(in srgb, var(--trainer-success, #437a22) 85%, #000);
    border-color: color-mix(in srgb, var(--trainer-success, #437a22) 85%, #000);
    color: #fff;
  }
}

@media (prefers-reduced-motion: reduce) {
  .app--fraction-reduction .fr-progress-fill,
  .app--fraction-reduction .fr-confetti .cp,
  .app--fraction-reduction .trainer-quiz-confetti .cp,
  .app--fraction-reduction .fr-key,
  .app--fraction-reduction .fr-card {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}