/* Умножение и деление смешанных чисел. tokens-only. Все селекторы под .app--mixed-improper. */
.app--mixed-improper {
  position: relative;
  max-width: 72rem;
  margin: 0 auto;
  padding: var(--space-4) var(--space-4) 0;
  font-family: var(--font-body);
  color: var(--text);
}

.app--mixed-improper [hidden] {
  display: none !important;
}

.app--mixed-improper .mi-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.app--mixed-improper .mi-confetti,
.app--mixed-improper .trainer-quiz-confetti {
  pointer-events: none;
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 40;
}

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

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

.app--mixed-improper .mi-exit {
  margin-bottom: var(--space-2);
}

.app--mixed-improper .mi-back {
  min-height: 44px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--primary);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
}

.app--mixed-improper .mi-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--mixed-improper .mi-topbar {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.app--mixed-improper .mi-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin: 0 auto var(--space-4);
}

.app--mixed-improper .mi-tab {
  min-height: 2.75rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.2;
  cursor: pointer;
  touch-action: manipulation;
}

.app--mixed-improper .mi-tab:disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

.app--mixed-improper .mi-tab.is-active {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--text-inv);
}

.app--mixed-improper .mi-config,
.app--mixed-improper .mi-solve,
.app--mixed-improper .mi-summary {
  margin-block: var(--space-4) 0;
}

.app--mixed-improper .mi-config {
  width: 100%;
  max-width: 36rem;
  margin-inline: auto;
}

.app--mixed-improper .mi-kinds {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.app--mixed-improper .mi-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 0.35rem;
  min-height: 88px;
  text-align: center;
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  background: var(--surface-2);
  box-shadow: var(--trainer-shadow-card, var(--shadow-md));
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    border-color 0.15s ease,
    background-color 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.15s ease;
}

.app--mixed-improper .mi-card.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

.app--mixed-improper .mi-card-title {
  font-weight: 800;
}

.app--mixed-improper .mi-card-hint {
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.35;
  max-width: 18rem;
}

.app--mixed-improper .mi-card-example {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15em 0.3em;
  margin-top: 0.15rem;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--primary);
}

.app--mixed-improper .mi-card-go {
  display: inline-block;
  margin-top: auto;
  padding-top: 0.65rem;
  color: var(--primary);
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1;
  transition: transform 0.15s ease;
}

.app--mixed-improper .mi-card:active {
  border-color: var(--primary);
  background: var(--primary-bg);
}

.app--mixed-improper .mi-check,
.app--mixed-improper .mi-next,
.app--mixed-improper .mi-skip,
.app--mixed-improper .mi-another,
.app--mixed-improper .mi-hint-btn {
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--radius-lg);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
}

.app--mixed-improper .mi-check,
.app--mixed-improper .mi-next {
  border: 0;
  background: var(--primary);
  color: var(--text-inv);
  padding: 0.7rem 1.4rem;
}

.app--mixed-improper .mi-skip,
.app--mixed-improper .mi-another,
.app--mixed-improper .mi-hint-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.45rem 0.9rem;
  box-shadow: var(--shadow-sm);
}

.app--mixed-improper .mi-hint-btn {
  position: relative;
  overflow: visible;
}

.app--mixed-improper .mi-hint-badge {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 1;
  transform: translate(40%, -45%);
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.28rem;
  border-radius: 999px;
  background: var(--primary);
  color: var(--surface);
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1.25rem;
  text-align: center;
  pointer-events: none;
  box-shadow: 0 0 0 2px var(--surface);
}

.app--mixed-improper .mi-hint-item + .mi-hint-item {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.app--mixed-improper .mi-solve-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.app--mixed-improper .mi-badge {
  display: inline-block;
  padding: 0.2em 0.55em;
  border-radius: var(--radius-md);
  background: var(--primary-bg);
  color: var(--primary);
  font-weight: 800;
  font-size: var(--text-sm);
}

.app--mixed-improper .mi-progress-text {
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--text-muted);
}

.app--mixed-improper .mi-progress {
  height: 8px;
  margin-bottom: var(--space-4);
  overflow: hidden;
  border-radius: var(--radius-full);
  background: var(--border);
}

.app--mixed-improper .mi-progress__fill {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
  transition: width 240ms ease;
}

.app--mixed-improper .mi-solve-layout {
  display: flex;
  flex-direction: column;
  gap: 0;
  min-height: 0;
}

.app--mixed-improper .mi-solve-main {
  flex: 1;
  min-height: 0;
}

.app--mixed-improper .mi-example {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  margin: 0 0 var(--space-3);
  font-size: clamp(2.1rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1;
}

.app--mixed-improper .mi-record,
.app--mixed-improper .mi-stage {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.app--mixed-improper .mi-record {
  padding: var(--space-3) var(--space-4);
}

.app--mixed-improper .mi-record__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  font-weight: 800;
}

.app--mixed-improper .mi-record__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.app--mixed-improper .mi-record__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.15rem 0.55rem;
  align-items: center;
}

.app--mixed-improper .mi-record__num,
.app--mixed-improper .mi-stage__num {
  display: grid;
  place-items: center;
  width: 1.45rem;
  height: 1.45rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 800;
}

.app--mixed-improper .mi-record__num {
  background: var(--surface-offset);
  color: var(--text-muted);
}

.app--mixed-improper .mi-record__label {
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: 700;
}

.app--mixed-improper .mi-record__math {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.28rem;
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1;
}

.app--mixed-improper .mi-record .mi-fraction__num {
  border-bottom-width: 2px;
}

.app--mixed-improper .mi-record__comma {
  margin-right: 0.15rem;
}

.app--mixed-improper .mi-record__note {
  grid-column: 1 / -1;
  margin: 0.2rem 0 0;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius-md);
  background: var(--success-bg);
  color: var(--success);
  font-size: var(--text-sm);
  font-weight: 700;
}

.app--mixed-improper .mi-stage {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4) var(--space-4);
  background: var(--primary-bg);
}

.app--mixed-improper .mi-stage__head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.app--mixed-improper .mi-stage__num {
  flex: 0 0 auto;
  background: var(--primary);
  color: var(--text-inv);
}

.app--mixed-improper .mi-step-title {
  margin: 0;
  min-width: 0;
  text-align: left;
  font-size: var(--text-lg);
  font-weight: 800;
  line-height: 1.3;
}

.app--mixed-improper .mi-chain {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-3) 0 var(--space-2);
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  font-weight: 800;
  line-height: 1;
}

.app--mixed-improper .mi-row,
.app--mixed-improper .mi-eq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(0.45rem, 2vw, 0.9rem);
  max-width: 100%;
}

.app--mixed-improper .mi-convert {
  flex-direction: column;
}

.app--mixed-improper .mi-row.is-active {
  padding: 0.15rem 0;
}

.app--mixed-improper .mi-fraction {
  display: inline-grid;
  grid-template-rows: 1fr 1fr;
  min-width: 1.4em;
  text-align: center;
  vertical-align: middle;
}

.app--mixed-improper .mi-fraction__num {
  padding: 0 0.15em 0.12em;
  border-bottom: 3px solid currentColor;
}

.app--mixed-improper .mi-fraction__den {
  padding: 0.12em 0.15em 0;
}

.app--mixed-improper .mi-op,
.app--mixed-improper .mi-equals {
  font-size: 0.85em;
  font-weight: 700;
}

.app--mixed-improper .mi-answer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.28em;
  min-width: 1.45em;
}

.app--mixed-improper .mi-input {
  display: inline-grid;
  justify-items: center;
  gap: 0.12rem;
  padding: 3px;
  border-radius: var(--radius-lg);
}

.app--mixed-improper .mi-input__num,
.app--mixed-improper .mi-input__den {
  width: 4.5rem;
  height: 3.15rem;
  box-sizing: border-box;
  text-align: center;
  font-size: 1.8rem;
  font-weight: 800;
  font-family: inherit;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  font-variant-numeric: tabular-nums;
  caret-color: var(--primary);
}

.app--mixed-improper .mi-input__num:focus,
.app--mixed-improper .mi-input__den:focus,
.app--mixed-improper .mi-input__num.is-active,
.app--mixed-improper .mi-input__den.is-active {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

.app--mixed-improper .mi-input__num:disabled,
.app--mixed-improper .mi-input__den:disabled {
  opacity: 1;
  color: var(--text);
  -webkit-text-fill-color: var(--text);
}

.app--mixed-improper .mi-input__num.is-ok,
.app--mixed-improper .mi-input__den.is-ok {
  border-color: var(--success);
  background: var(--success-bg);
}

.app--mixed-improper .mi-input__num.is-bad,
.app--mixed-improper .mi-input__den.is-bad {
  border-color: var(--error);
  background: var(--error-bg);
}

.app--mixed-improper .mi-input__num.is-warn,
.app--mixed-improper .mi-input__den.is-warn {
  border-color: var(--warning, #c47d12);
  background: color-mix(in srgb, var(--warning, #c47d12) 12%, var(--surface));
}

.app--mixed-improper .mi-input__line {
  width: 4.5rem;
  height: 3px;
  background: currentColor;
  border-radius: 2px;
}

.app--mixed-improper .mi-input.is-ok {
  background: var(--success-bg);
}

.app--mixed-improper .mi-input.is-bad {
  background: var(--error-bg);
}

.app--mixed-improper .mi-input.is-warn {
  background: color-mix(in srgb, var(--warning, #c47d12) 12%, var(--surface));
}

.app--mixed-improper .mi-input.is-revealed {
  background: var(--primary-bg);
}

.app--mixed-improper .mi-input.is-ok .mi-input__num,
.app--mixed-improper .mi-input.is-ok .mi-input__den {
  border-color: var(--success);
}

.app--mixed-improper .mi-input.is-bad .mi-input__num,
.app--mixed-improper .mi-input.is-bad .mi-input__den {
  border-color: var(--error);
}

.app--mixed-improper .mi-input.is-warn .mi-input__num,
.app--mixed-improper .mi-input.is-warn .mi-input__den {
  border-color: var(--warning, #c47d12);
}

.app--mixed-improper .mi-input.is-revealed .mi-input__num,
.app--mixed-improper .mi-input.is-revealed .mi-input__den {
  border-color: var(--primary);
}

.app--mixed-improper .mi-feedback {
  margin: var(--space-3) 0 0;
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-md);
  text-align: left;
  font-weight: 700;
}

.app--mixed-improper .mi-feedback.is-empty {
  display: none;
}

.app--mixed-improper .mi-feedback.is-ok {
  color: var(--success);
  background: var(--success-bg);
}

.app--mixed-improper .mi-feedback.is-bad {
  color: var(--error);
  background: var(--error-bg);
}

.app--mixed-improper .mi-feedback.is-warn {
  color: var(--warning, #9a5b00);
  background: color-mix(in srgb, var(--warning, #c47d12) 14%, var(--surface));
}

.app--mixed-improper .mi-dock-body {
  display: contents;
}

.app--mixed-improper .mi-solve-dock[hidden] {
  display: none;
}

.app--mixed-improper .mi-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));
  margin-top: var(--space-4);
}

.app--mixed-improper .mi-back:focus-visible,
.app--mixed-improper .mi-tab:focus-visible,
.app--mixed-improper .mi-card:focus-visible,
.app--mixed-improper .mi-check:focus-visible,
.app--mixed-improper .mi-next:focus-visible,
.app--mixed-improper .mi-skip:focus-visible,
.app--mixed-improper .mi-another:focus-visible,
.app--mixed-improper .mi-hint-btn:focus-visible,
.app--mixed-improper .mi-key:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.app--mixed-improper .mi-hint-card {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}

.app--mixed-improper .mi-hint-text,
.app--mixed-improper .mi-scheme__line {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.45;
}

.app--mixed-improper .mi-scheme {
  margin-top: var(--space-2);
  font-weight: 700;
}

.app--mixed-improper .mi-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.app--mixed-improper .mi-actions .mi-check,
.app--mixed-improper .mi-actions .mi-another,
.app--mixed-improper .mi-actions .mi-skip {
  flex: 1 1 8rem;
}

.app--mixed-improper .mi-numpad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  width: 100%;
}

.app--mixed-improper .mi-key {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  min-width: 44px;
  min-height: 48px;
  border: 1px solid color-mix(in srgb, var(--primary) 12%, var(--border));
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 2px 6px color-mix(in srgb, var(--text) 7%, transparent);
  color: color-mix(in srgb, var(--primary) 72%, var(--text));
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    transform 130ms ease,
    background 130ms ease,
    border-color 130ms ease,
    box-shadow 130ms ease;
}

.app--mixed-improper .mi-key:active {
  transform: scale(0.95);
  box-shadow: none;
}

.app--mixed-improper .mi-key--del {
  flex-direction: column;
  gap: 0;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.app--mixed-improper .mi-key-del__icon {
  font-size: 1.15rem;
  line-height: 1;
}

.app--mixed-improper .mi-key-del__label {
  font-size: 0.62rem;
  line-height: 1;
}

.app--mixed-improper .mi-key--ok {
  border-color: var(--success);
  background: var(--success);
  color: var(--text-inv);
}

.app--mixed-improper .mi-numpad.is-whole .mi-key--ok {
  grid-column: 1 / -1;
}

.app--mixed-improper .mi-key--frac {
  font-size: 0.82rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
  background: var(--color-print);
  color: var(--text);
  border-color: #c56a2e;
}

.app--mixed-improper .mi-key--frac.is-active {
  background: #9a3412;
  color: var(--text-inv);
  border-color: #9a3412;
}

.app--mixed-improper .mi-success,
.app--mixed-improper .mi-reveal,
.app--mixed-improper .mi-summary {
  text-align: center;
  padding: var(--space-4);
}

.app--mixed-improper .mi-success {
  margin-top: var(--space-3);
  background: var(--success-bg);
  border-radius: var(--radius-lg);
}

.app--mixed-improper .mi-success__icon {
  margin: 0;
  font-size: 1.75rem;
  color: var(--success);
}

.app--mixed-improper .mi-success__title,
.app--mixed-improper .mi-summary__title {
  margin: var(--space-1) 0 var(--space-3);
  font-family: var(--font-display);
}

.app--mixed-improper .mi-success__chain,
.app--mixed-improper .mi-reveal__chain {
  margin: 0 0 var(--space-4);
  font-weight: 700;
}

.app--mixed-improper .mi-reveal {
  margin-top: var(--space-3);
  background: var(--primary-bg);
  border-radius: var(--radius-lg);
}

.app--mixed-improper .mi-reveal__label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--text-muted);
}

.app--mixed-improper .mi-reveal__text {
  margin: 0 0 var(--space-2);
  font-weight: 700;
}

.app--mixed-improper .check-live {
  margin-top: 0.85rem;
}

.app--mixed-improper .mi-summary .check-stats {
  margin: 0 0 var(--space-6);
  text-align: left;
}

.app--mixed-improper .mi-summary__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.app--mixed-improper .mi-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: rgba(30, 41, 59, 0.35);
  padding: var(--space-4);
}

.app--mixed-improper .mi-dialog {
  width: min(100%, 22rem);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

.app--mixed-improper .mi-dialog-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
}

.app--mixed-improper .mi-dialog-text {
  margin: 0 0 var(--space-4);
  color: var(--text-muted);
}

.app--mixed-improper .mi-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

@media (min-width: 640px) {
  .app--mixed-improper .mi-kinds {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .app--mixed-improper .mi-workspace {
    max-width: 48rem;
    margin-inline: auto;
  }

  .app--mixed-improper .mi-tabs {
    max-width: 32rem;
  }

  .app--mixed-improper .mi-solve-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    align-items: start;
    gap: 0.75rem;
  }

  .app--mixed-improper .mi-solve-layout:has(.mi-dock-body[hidden]) {
    grid-template-columns: minmax(0, 1fr);
  }

  .app--mixed-improper .mi-solve-main {
    grid-column: 1;
    grid-row: 1;
  }

  .app--mixed-improper .mi-solve-dock {
    display: contents;
  }

  .app--mixed-improper .mi-record__item {
    grid-template-columns: auto auto minmax(0, 1fr);
  }

  .app--mixed-improper .mi-record__math {
    grid-column: auto;
    justify-content: flex-end;
    margin-left: auto;
  }

  .app--mixed-improper .mi-dock-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 4.5rem;
    align-self: start;
    border-left: 1px solid var(--border);
    padding: 0 0 0 0.75rem;
    background: var(--surface);
  }
}

@media (max-width: 719px) {
  .app--mixed-improper {
    width: 100%;
    padding-inline: var(--space-4);
  }

  .app--mixed-improper .mi-workspace {
    padding: var(--space-4);
  }

  .app--mixed-improper .mi-example {
    gap: 0.45rem;
    font-size: clamp(1.9rem, 9vw, 2.5rem);
  }

  .app--mixed-improper .mi-record__math {
    font-size: 0.95rem;
  }

  .app--mixed-improper .mi-stage {
    padding: var(--space-3);
  }

  .app--mixed-improper .mi-solve-dock {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 30;
    padding: 0.4rem var(--space-3) calc(0.4rem + env(safe-area-inset-bottom, 0px));
    background: var(--surface);
    box-shadow: 0 -8px 20px color-mix(in srgb, var(--text) 12%, transparent);
  }

  html.partner-floor-visible .app--mixed-improper .mi-solve-dock {
    bottom: calc(var(--partner-floor-h, 0px) + 18px);
  }

  .app--mixed-improper .mi-solve-dock .mi-dock-body {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 0.35rem;
    width: 100%;
  }

  .app--mixed-improper .mi-solve-dock .mi-help-wrap,
  .app--mixed-improper .mi-solve-dock .mi-actions {
    flex: 1 1 8rem;
  }

  .app--mixed-improper .mi-solve-dock .mi-numpad {
    flex: 1 0 100%;
  }

  .app--mixed-improper .mi-check,
  .app--mixed-improper .mi-next {
    width: 100%;
    min-height: 3.5rem;
  }

  .app--mixed-improper .mi-solve-dock .mi-actions {
    flex-direction: row;
  }

  .app--mixed-improper .mi-actions .mi-check,
  .app--mixed-improper .mi-actions .mi-another,
  .app--mixed-improper .mi-actions .mi-skip,
  .app--mixed-improper .mi-solve-dock .mi-hint-btn {
    flex: 1 1 auto;
    width: 100%;
    min-height: 44px;
  }

  .app--mixed-improper .mi-numpad {
    gap: 4px;
  }

  .app--mixed-improper .mi-key {
    height: 44px;
    min-height: 44px;
    font-size: 1.1rem;
    border-radius: 10px;
  }

  .app--mixed-improper .mi-key-del__label {
    display: none;
  }

  .app--mixed-improper .mi-input__num,
  .app--mixed-improper .mi-input__den,
  .app--mixed-improper .mi-input__line {
    width: clamp(3.35rem, 15vw, 4.25rem);
  }

  .app--mixed-improper .mi-input__num,
  .app--mixed-improper .mi-input__den {
    height: 2.85rem;
    font-size: 1.55rem;
  }
}

@media (max-width: 520px) {
  .app--mixed-improper .mi-tab {
    min-height: 48px;
    padding: 0.45rem 0.55rem;
    gap: 0.35rem;
  }

  .app--mixed-improper .mi-tab__icon {
    font-size: 1rem;
  }

  .app--mixed-improper .mi-workspace {
    padding: var(--space-3);
  }

  .app--mixed-improper .mi-success,
  .app--mixed-improper .mi-reveal {
    padding: var(--space-3);
  }
}

@media (max-width: 360px) {
  .app--mixed-improper {
    padding-inline: var(--space-2);
  }

  .app--mixed-improper .mi-tab__icon {
    display: none;
  }

  .app--mixed-improper .mi-input__num,
  .app--mixed-improper .mi-input__den,
  .app--mixed-improper .mi-input__line {
    width: 3.2rem;
  }
}

@media (hover: hover) and (pointer: fine) {
  .app--mixed-improper .mi-back:hover {
    background: var(--primary-bg);
  }

  .app--mixed-improper .mi-tab:hover:not(:disabled),
  .app--mixed-improper .mi-hint-btn:hover,
  .app--mixed-improper .mi-skip:hover,
  .app--mixed-improper .mi-another:hover,
  .app--mixed-improper .mi-key:hover {
    box-shadow: var(--shadow-md);
  }

  .app--mixed-improper .mi-card:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .app--mixed-improper .mi-card:hover .mi-card-go {
    transform: translateX(6px);
  }

  .app--mixed-improper .mi-check:hover,
  .app--mixed-improper .mi-next:hover {
    background: var(--primary-h);
  }

  .app--mixed-improper .mi-key:hover {
    border-color: color-mix(in srgb, var(--primary) 22%, var(--border));
    background: var(--primary-bg);
    transform: scale(1.04);
  }

  .app--mixed-improper .mi-key--ok:hover {
    border-color: var(--success);
    background: color-mix(in srgb, var(--success) 85%, #000);
    color: var(--text-inv);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app--mixed-improper .mi-confetti .cp,
  .app--mixed-improper .trainer-quiz-confetti .cp {
    animation: none;
  }

  .app--mixed-improper .mi-tab,
  .app--mixed-improper .mi-card,
  .app--mixed-improper .mi-card-go {
    transition: none;
  }

  .app--mixed-improper .mi-card:hover,
  .app--mixed-improper .mi-card:hover .mi-card-go {
    transform: none;
  }

  .app--mixed-improper .mi-progress__fill {
    transition: none;
  }

  .app--mixed-improper .mi-key {
    transition: none;
  }
}

.app--mixed-improper .mi-kinds {
  grid-template-columns: 1fr;
}

.app--mixed-improper .mi-levels-title {
  margin: var(--space-5) 0 var(--space-3);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  text-align: center;
}

.app--mixed-improper .mi-levels {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.app--mixed-improper .mi-level {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  min-height: 72px;
  text-align: left;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  background: var(--surface-2);
  box-shadow: var(--trainer-shadow-card, var(--shadow-md));
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

.app--mixed-improper .mi-level.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

.app--mixed-improper .mi-level__title {
  font-weight: 800;
}

.app--mixed-improper .mi-level__hint {
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.35;
}

.app--mixed-improper .mi-integer {
  font-weight: 800;
}

.app--mixed-improper .mi-answer {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.app--mixed-improper .mi-input__whole {
  width: 3.4rem;
  height: 3.15rem;
  box-sizing: border-box;
  text-align: center;
  font-size: 1.8rem;
  font-weight: 800;
  font-family: inherit;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  font-variant-numeric: tabular-nums;
  caret-color: var(--primary);
}

.app--mixed-improper .mi-input__whole:focus,
.app--mixed-improper .mi-input__whole.is-active {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

.app--mixed-improper .mi-input__whole:disabled {
  opacity: 1;
  color: var(--text);
  -webkit-text-fill-color: var(--text);
}

.app--mixed-improper .mi-input__whole.is-ok {
  border-color: var(--success);
  background: var(--success-bg);
}

.app--mixed-improper .mi-input__whole.is-bad {
  border-color: var(--error);
  background: var(--error-bg);
}

.app--mixed-improper .mi-input__whole.is-warn {
  border-color: var(--warning, #c47d12);
  background: color-mix(in srgb, var(--warning, #c47d12) 12%, var(--surface));
}

@media (min-width: 640px) {
  .app--mixed-improper .mi-kinds {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .app--mixed-improper .mi-levels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  .app--mixed-improper .mi-input__whole {
    width: clamp(2.6rem, 12vw, 3.2rem);
    height: 2.85rem;
    font-size: 1.55rem;
  }
}

@media (hover: hover) and (pointer: fine) {
  .app--mixed-improper .mi-level:hover {
    box-shadow: var(--shadow-md);
  }
}

.app--mixed-improper .mi-mixed {
  display: inline-flex;
  align-items: center;
  gap: 0.12em;
}

.app--mixed-improper .mi-mixed__whole {
  line-height: 1;
}

.app--mixed-improper .mi-flip {
  display: flex;
}