/* Тренажёр умножения — цвета МасОбр */
.trainer-app {
  --tr-border: var(--color-border);
  --tr-text: var(--color-text);
  --tr-muted: var(--color-muted);
  --tr-primary: var(--color-primary);
  --tr-primary-hover: var(--color-primary-dark);
  --tr-success: #0d9488;
  --tr-success-bg: var(--color-success-bg);
  --tr-error: #dc2626;
  --tr-error-bg: var(--color-danger-bg);
  --tr-active: #ecfeff;
  --tr-active-border: var(--color-primary);
  --tr-carry: #7dd3fc;
  --cell-size: 2.75rem;
  --carry-size: 1.75rem;
}

.trainer-panel,
.trainer-stats {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}

.trainer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.trainer-meta strong {
  color: var(--color-text);
}

.trainer-settings-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.trainer-settings-group {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.75rem 1rem 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  background: var(--color-bg);
}

.trainer-settings-group legend {
  padding: 0 0.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.trainer-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
}

.trainer-field span,
.trainer-field label {
  color: var(--color-muted);
}

.trainer-field input,
.trainer-field select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 1rem;
  background: #fff;
  color: var(--color-text);
}

.trainer-field-checkbox {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  grid-column: 1 / -1;
}

.trainer-field-checkbox input {
  width: 1.1rem;
  height: 1.1rem;
}

.trainer-field-range[hidden] {
  display: none;
}

.step-hint {
  margin: 0.25rem 0 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.worksheet-area {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.worksheet-scroll {
  overflow-x: auto;
  padding-bottom: 0.5rem;
  flex: 0 1 auto;
}

.operand-hint {
  font-family: "Consolas", "Courier New", monospace;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-primary);
  padding: 1rem 0.5rem;
  min-width: 8rem;
  line-height: 1.3;
}

.worksheet {
  display: inline-block;
  min-width: min-content;
  font-family: "Consolas", "Courier New", monospace;
  font-size: 1.5rem;
  padding: 1rem;
  color: var(--color-text);
}

.worksheet-row {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  margin-bottom: 0.35rem;
}

.worksheet-row.operands { margin-bottom: 0; }

.worksheet-row.divider {
  border-bottom: 2px solid var(--color-text);
  padding-bottom: 0.35rem;
  margin-bottom: 0.5rem;
}

.worksheet-row.divider-top {
  border-top: 2px solid var(--color-text);
  padding-top: 0.5rem;
  margin-top: 0.5rem;
}

.row-label {
  width: 2rem;
  text-align: center;
  color: var(--color-muted);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.row-label.empty { visibility: hidden; }

.cell-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: var(--cell-size);
  flex-shrink: 0;
}

.cell-group.spacer { visibility: hidden; }
.cell-group.compact .carry-in,
.cell-group.compact .carry-out-wrap { display: none; }

.carry-in {
  font-size: 0.7rem;
  color: var(--tr-carry);
  height: 1rem;
  line-height: 1rem;
  min-height: 1rem;
}

.digit-cell {
  width: var(--cell-size);
  height: var(--cell-size);
  text-align: center;
  font-size: 1.4rem;
  font-family: inherit;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  background: #fff;
  color: var(--color-text);
}

.digit-cell.readonly {
  border-color: transparent;
  background: transparent;
  pointer-events: none;
}

.digit-cell.operand-highlight {
  border-color: #f59e0b;
  background: var(--color-warning-bg);
  box-shadow: 0 0 0 2px #fde68a;
}

.digit-cell.active {
  border-color: var(--tr-active-border);
  background: var(--tr-active);
  outline: none;
}

.digit-cell.correct {
  border-color: var(--tr-success);
  background: var(--tr-success-bg);
  color: var(--tr-success);
}

.digit-cell.wrong {
  border-color: var(--tr-error);
  background: var(--tr-error-bg);
  animation: trainer-shake 0.3s;
}

.digit-cell:disabled {
  background: #e0f2fe;
  color: #0369a1;
}

.carry-out-wrap {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-top: 0.15rem;
  font-size: 0.65rem;
  color: var(--color-muted);
}

.carry-out-wrap.hidden { visibility: hidden; }

.carry-out {
  width: var(--carry-size);
  height: var(--carry-size);
  text-align: center;
  font-size: 0.85rem;
  font-family: inherit;
  border: 1px dashed var(--color-border);
  border-radius: 4px;
  background: #fff;
}

.carry-out.active {
  border-color: var(--tr-active-border);
  background: var(--tr-active);
}

.carry-out.correct {
  border-color: var(--tr-success);
  background: var(--tr-success-bg);
}

.carry-out.wrong {
  border-color: var(--tr-error);
  background: var(--tr-error-bg);
}

.carry-out:disabled { background: #f0f9ff; }

@keyframes trainer-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.trainer-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.trainer-app .feedback {
  margin: 0;
  font-size: 0.95rem;
  min-height: 1.4rem;
}

.trainer-app .feedback.error { color: var(--tr-error); }
.trainer-app .feedback.success { color: var(--tr-success); }

.completion-block {
  margin-top: 1.25rem;
  padding: 1rem;
  background: var(--color-success-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-align: center;
}

.praise {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--tr-success);
}

.trainer-stats summary {
  cursor: pointer;
  font-weight: 600;
  user-select: none;
  color: var(--color-text);
}

.stats-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0;
}

.stats-list li {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.stats-empty {
  color: var(--color-muted);
  border: none !important;
}

.stats-bar-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.stats-bar {
  flex: 1;
  min-width: 80px;
  height: 8px;
  background: #e0f2fe;
  border-radius: 4px;
  overflow: hidden;
}

.stats-bar-fill {
  height: 100%;
  background: var(--tr-error);
  border-radius: 4px;
}

.trainer-list,
.trainer-assign-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.trainer-list li,
.trainer-assign-links li {
  margin-bottom: 0.75rem;
}

.trainer-subject {
  margin: 1.25rem 0 1.75rem;
  padding: 0.85rem 0 0.25rem 0.9rem;
  border-left: 4px solid var(--color-border);
}

.trainer-subject--matematika {
  border-left-color: #1f6f8b;
}

.trainer-subject--russkiy-yazyk {
  border-left-color: #b45309;
}

.trainer-subject__title {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.trainer-subject--matematika .trainer-subject__title {
  color: #1f6f8b;
}

.trainer-subject--russkiy-yazyk .trainer-subject__title {
  color: #b45309;
}

.trainer-card {
  display: block;
  padding: 1rem 1.15rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
}

.trainer-card--matematika {
  border-left-color: #1f6f8b;
}

.trainer-card--russkiy-yazyk {
  border-left-color: #b45309;
}

.trainer-card:hover {
  border-color: var(--color-primary);
}

.trainer-card--matematika:hover {
  border-color: #1f6f8b;
}

.trainer-card--russkiy-yazyk:hover {
  border-color: #b45309;
}

.trainer-subject-tag {
  display: inline-block;
  margin-bottom: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.trainer-card--matematika .trainer-subject-tag {
  color: #1f6f8b;
}

.trainer-card--russkiy-yazyk .trainer-subject-tag {
  color: #b45309;
}

.trainer-card .learn-meta {
  display: block;
  margin-top: 0.35rem;
  color: var(--color-muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .trainer-app {
    --cell-size: 2.25rem;
    --carry-size: 1.5rem;
  }
  .worksheet { font-size: 1.25rem; }
  .trainer-settings-group { grid-template-columns: 1fr; }
}