/* Тренажёр НОД и НОК. Профиль tokens-only. Все селекторы под .app--nod-nok. */
.app--nod-nok {
  position: relative;
  max-width: 72rem;
  margin: 0 auto;
  padding: var(--space-2) var(--space-4) var(--space-8);
  font-family: var(--font-body);
  color: var(--text);
}

.app--nod-nok .nn-confetti,
.app--nod-nok .trainer-quiz-confetti {
  pointer-events: none;
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 40;
}

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

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

.app--nod-nok [hidden] {
  display: none !important;
}

.app--nod-nok .nn-exit {
  margin-bottom: var(--space-2);
}

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

.app--nod-nok .nn-topbar {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.app--nod-nok .nn-topbar__meta {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--text-muted);
}

.app--nod-nok .nn-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--nod-nok .nn-back:hover {
  background: var(--primary-bg);
}

.app--nod-nok .nn-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.app--nod-nok .nn-tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  min-height: 56px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface-2);
  font: inherit;
  text-align: left;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background 130ms ease,
    border-color 130ms ease,
    color 130ms ease,
    transform 130ms ease;
}

.app--nod-nok .nn-tab__icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
  line-height: 1;
}

.app--nod-nok .nn-tab__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.app--nod-nok .nn-tab__title {
  font-family: var(--font-display);
  font-size: clamp(0.875rem, 3.2vw, 1rem);
  font-weight: 800;
  line-height: 1.2;
}

.app--nod-nok .nn-tab__sub {
  display: block;
  font-size: clamp(0.625rem, 2.4vw, 0.75rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-muted);
}

.app--nod-nok .nn-tab.is-active {
  background: var(--primary);
  color: var(--text-inv);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.app--nod-nok .nn-tab.is-active .nn-tab__sub {
  color: color-mix(in srgb, var(--text-inv) 85%, transparent);
}

.app--nod-nok .nn-tab:active {
  transform: scale(0.98);
}

.app--nod-nok .nn-config,
.app--nod-nok .nn-idle,
.app--nod-nok .nn-solve,
.app--nod-nok .nn-summary {
  margin-block: var(--space-4) var(--space-6);
}

.app--nod-nok .nn-config {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-5);
}

.app--nod-nok .nn-config-panel {
  width: 100%;
  max-width: 36rem;
  margin: 0 auto;
  padding: 0;
  box-sizing: border-box;
}

.app--nod-nok .nn-config-head {
  margin-bottom: var(--space-4);
  text-align: center;
}

.app--nod-nok .nn-config-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4.5vw, 1.75rem);
  font-weight: 800;
  line-height: 1.2;
}

.app--nod-nok .nn-config-lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.app--nod-nok .nn-ops {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.app--nod-nok .nn-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  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);
  font: inherit;
  cursor: pointer;
}

.app--nod-nok .nn-card--op {
  background: var(--surface-2);
}

.app--nod-nok .nn-card.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

.app--nod-nok .nn-card-title {
  font-weight: 800;
}

.app--nod-nok .nn-card-hint {
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.35;
  max-width: 16rem;
}

.app--nod-nok .nn-card-example {
  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--nod-nok .nn-start--config {
  width: 100%;
  min-height: 52px;
  margin-top: var(--space-4);
  font-size: 1.125rem;
}

.app--nod-nok .nn-start,
.app--nod-nok .nn-check,
.app--nod-nok .nn-next,
.app--nod-nok .nn-idle-start {
  min-height: 56px;
  padding: 0.55em 1.2em;
  border: 0;
  border-radius: var(--radius-lg);
  background: var(--primary);
  color: var(--text-inv);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    transform 130ms ease,
    background 130ms ease;
}

.app--nod-nok .nn-check:active,
.app--nod-nok .nn-next:active {
  transform: scale(0.98);
}

.app--nod-nok .nn-start:hover,
.app--nod-nok .nn-check:hover,
.app--nod-nok .nn-next:hover,
.app--nod-nok .nn-idle-start:hover {
  background: var(--primary-h);
}

.app--nod-nok .nn-check:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.app--nod-nok .nn-howto {
  width: 100%;
  max-width: 36rem;
  margin: 0 auto;
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  box-sizing: border-box;
}

@media (min-width: 640px) {
  .app--nod-nok .nn-ops {
    grid-template-columns: 1fr 1fr;
  }

  .app--nod-nok .nn-config-panel {
    padding: var(--space-6) var(--space-5);
  }
}

.app--nod-nok .nn-howto__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
}

.app--nod-nok .nn-howto__list {
  margin: 0;
  padding-left: 1.2rem;
}

.app--nod-nok .nn-idle-card {
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.app--nod-nok .nn-idle-title {
  margin: 0 0 var(--space-2);
}

.app--nod-nok .nn-idle-lead {
  margin: 0 0 var(--space-4);
  color: var(--text-muted);
}

.app--nod-nok .nn-solve-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.app--nod-nok .nn-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--nod-nok .nn-progress-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

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

.app--nod-nok .nn-progress-fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--primary);
  border-radius: inherit;
}

.app--nod-nok .nn-solve-layout {
  display: flex;
  flex-direction: column;
  gap: 0;
  min-height: 0;
}

.app--nod-nok .nn-solve-main {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding-bottom: var(--space-2);
  -webkit-overflow-scrolling: touch;
}

.app--nod-nok .nn-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--nod-nok .nn-problem {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding: var(--space-4);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  text-align: center;
}

.app--nod-nok .nn-problem-lead {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-muted);
}

.app--nod-nok .nn-solve-title {
  margin: 0;
  font-size: clamp(1.5rem, 4.5vw, 2rem);
}

.app--nod-nok .nn-board {
  margin-bottom: var(--space-4);
}

.app--nod-nok .nn-step {
  margin-bottom: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.app--nod-nok .nn-step:last-child {
  margin-bottom: 0;
}

.app--nod-nok .nn-step.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

.app--nod-nok .nn-step.is-done {
  border-color: var(--success);
  background: var(--success-bg);
}

.app--nod-nok .nn-step.is-locked {
  opacity: 0.7;
}

.app--nod-nok .nn-step-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.app--nod-nok .nn-step-label {
  margin: 0;
  font-size: 1.05rem;
}

.app--nod-nok .nn-step-status {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-muted);
}

.app--nod-nok .nn-step.is-active .nn-step-status {
  color: var(--primary);
}

.app--nod-nok .nn-step.is-done .nn-step-status {
  color: var(--success);
}

.app--nod-nok .nn-step-wait {
  margin: 0;
  color: var(--text-muted);
  font-style: italic;
}

.app--nod-nok .nn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.app--nod-nok .nn-remainder {
  flex: 1 1 100%;
  margin: 0 0 0 3.5rem;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-muted);
}

.app--nod-nok .nn-remainder.is-ok {
  color: var(--success);
}

.app--nod-nok .nn-remainder.is-bad {
  color: var(--error);
}

.app--nod-nok .nn-label {
  font-weight: 800;
  min-width: 3.5rem;
}

.app--nod-nok .nn-slots,
.app--nod-nok .nn-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.app--nod-nok .nn-op {
  color: var(--text-muted);
  font-weight: 800;
}

.app--nod-nok .nn-slot {
  width: 3rem;
  min-height: 44px;
  text-align: center;
  font: inherit;
  font-weight: 800;
  font-size: 1.15rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  cursor: pointer;
}

.app--nod-nok .nn-slot--wide {
  width: 5.5rem;
}

.app--nod-nok .nn-slot:focus,
.app--nod-nok .nn-slot.is-active {
  outline: 3px solid var(--primary-bg);
  border-color: var(--primary);
}

.app--nod-nok .nn-slot.is-filled {
  border-color: var(--success);
  background: var(--success-bg);
}

.app--nod-nok .nn-slot.is-bad {
  border-color: var(--error);
  background: var(--error-bg);
  color: var(--error);
}

.app--nod-nok .nn-slot.flash-bad {
  animation: nn-flash-bad 220ms ease;
}

@keyframes nn-flash-bad {
  0%,
  100% {
    background: var(--error-bg);
    border-color: var(--error);
  }
  50% {
    background: #fde8e8;
    box-shadow: inset 0 0 0 2px rgba(209, 36, 36, 0.35);
  }
}

.app--nod-nok .nn-slot.is-locked {
  cursor: default;
}

.app--nod-nok .nn-chip {
  min-width: 44px;
  min-height: 44px;
  padding: 0.35em 0.7em;
  border-radius: var(--radius-full);
  border: 2px solid var(--border);
  background: var(--primary-bg);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.app--nod-nok .nn-chip[data-side="b"] {
  background: var(--success-bg);
}

.app--nod-nok .nn-chip.is-on {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-bg);
}

.app--nod-nok .nn-chip.is-locked {
  cursor: default;
}

.app--nod-nok .nn-eq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  margin: 0 0 var(--space-3);
}

.app--nod-nok .nn-verify {
  font-weight: 700;
}

.app--nod-nok .nn-verify p {
  margin: 0 0 var(--space-2);
}

.app--nod-nok .nn-feedback {
  min-height: 1.5em;
  margin: 0 0 var(--space-3);
  font-weight: 700;
}

.app--nod-nok .nn-feedback.is-ok {
  color: var(--success);
}

.app--nod-nok .nn-feedback.is-bad {
  color: var(--error);
}

.app--nod-nok .nn-hint {
  margin: 0 0 var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--primary-bg);
}

.app--nod-nok .nn-dock {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.5rem;
}

.app--nod-nok .nn-dock .nn-check,
.app--nod-nok .nn-dock .nn-next {
  flex: 1 1 8rem;
  min-width: 0;
  margin: 0;
}

.app--nod-nok .nn-hint-btn,
.app--nod-nok .nn-skip,
.app--nod-nok .nn-restart,
.app--nod-nok .nn-topics {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 0.45em 0.9em;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
}

.app--nod-nok .nn-numpad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  width: 100%;
  max-width: none;
  margin: 0;
}

.app--nod-nok .nn-key {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 56px;
  min-height: 56px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--primary) 12%, var(--border));
  background: var(--surface);
  box-shadow: 0 2px 6px color-mix(in srgb, var(--text) 7%, transparent);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.375rem;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--primary) 72%, var(--text));
  cursor: pointer;
  touch-action: manipulation;
  transition:
    transform 130ms ease,
    background 130ms ease,
    border-color 130ms ease,
    box-shadow 130ms ease;
}

.app--nod-nok .nn-key:hover {
  background: var(--primary-bg);
  border-color: color-mix(in srgb, var(--primary) 22%, var(--border));
  transform: scale(1.05);
}

.app--nod-nok .nn-key:active {
  transform: scale(0.95);
  box-shadow: none;
}

.app--nod-nok .nn-key:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.app--nod-nok .nn-key--wide {
  grid-column: span 2;
}

.app--nod-nok .nn-key--del {
  flex-direction: column;
  gap: 0;
  font-size: 0.72rem;
  line-height: 1.05;
  font-weight: 700;
  color: var(--text-muted);
  padding-top: 0.15rem;
}

.app--nod-nok .nn-key-del__icon {
  font-size: 1.15rem;
  line-height: 1;
}

.app--nod-nok .nn-key-del__label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.app--nod-nok .nn-key--del:hover,
.app--nod-nok .nn-key--del:focus-visible {
  background: var(--error);
  border-color: var(--error);
  color: var(--text-inv);
  transform: scale(1.03);
}

.app--nod-nok .nn-overlay {
  position: fixed;
  inset: 0;
  z-index: 600;
  display: grid;
  place-items: center;
  padding: var(--space-4);
  background: color-mix(in srgb, var(--text) 45%, transparent);
}

.app--nod-nok .nn-dialog {
  width: min(28rem, 100%);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}

.app--nod-nok .nn-dialog-title {
  margin: 0 0 var(--space-2);
}

.app--nod-nok .nn-dialog-text {
  margin: 0 0 var(--space-4);
}

.app--nod-nok .nn-dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.app--nod-nok .nn-summary-score {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 900;
  margin: 0 0 var(--space-2);
}

.app--nod-nok .nn-summary-lead,
.app--nod-nok .nn-summary-meta {
  margin: 0 0 var(--space-2);
}

.app--nod-nok .nn-summary-stats {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-4) 0;
}

.app--nod-nok .nn-summary-stats div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
}

.app--nod-nok .nn-summary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

@media (max-width: 719px) {
  .app--nod-nok .nn-problem {
    margin-bottom: var(--space-2);
    padding: var(--space-3);
  }

  .app--nod-nok .nn-problem-lead {
    font-size: var(--text-xs);
  }

  .app--nod-nok .nn-solve-title {
    font-size: 1.35rem;
  }

  .app--nod-nok .nn-board {
    margin-bottom: var(--space-2);
  }

  .app--nod-nok .nn-step.is-locked .nn-step-body,
  .app--nod-nok .nn-step.is-done .nn-step-body {
    display: none;
  }

  .app--nod-nok .nn-step.is-locked,
  .app--nod-nok .nn-step.is-done {
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-2);
  }

  .app--nod-nok .nn-step.is-locked .nn-step-head,
  .app--nod-nok .nn-step.is-done .nn-step-head {
    margin-bottom: 0;
  }

  .app--nod-nok .nn-step.is-active {
    padding: var(--space-3);
  }

  .app--nod-nok .nn-step-label {
    font-size: 0.9375rem;
  }

  .app--nod-nok .nn-slot {
    width: 2.5rem;
    min-height: 40px;
    font-size: 1rem;
  }

  .app--nod-nok .nn-solve-dock {
    gap: 0.35rem;
    padding-top: 0.35rem;
  }

  .app--nod-nok .nn-hint {
    margin-bottom: 0.35rem;
    padding: var(--space-2);
    font-size: var(--text-sm);
  }

  .app--nod-nok .nn-dock .nn-check,
  .app--nod-nok .nn-dock .nn-next {
    min-height: 44px;
    padding: 0.45em 0.75em;
    font-size: 0.9375rem;
  }

  .app--nod-nok .nn-hint-btn {
    padding: 0.45em 0.65em;
    font-size: var(--text-sm);
  }

  .app--nod-nok .nn-numpad {
    gap: 4px;
  }

  .app--nod-nok .nn-key {
    height: 44px;
    min-height: 44px;
    font-size: 1.15rem;
    border-radius: 10px;
  }

  .app--nod-nok .nn-key-del__label {
    display: none;
  }

  .app--nod-nok .nn-key--del {
    padding-top: 0;
  }
}

@media (min-width: 720px) {
  .app--nod-nok .nn-workspace {
    max-width: 48rem;
    margin-inline: auto;
  }

  .app--nod-nok .nn-tabs {
    max-width: 32rem;
  }

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

  .app--nod-nok .nn-solve-main {
    overflow: visible;
    padding-bottom: 0;
  }

  .app--nod-nok .nn-problem {
    max-width: 28rem;
    width: 100%;
    margin-inline: auto;
  }

  .app--nod-nok .nn-board {
    width: fit-content;
    max-width: 100%;
    margin-inline: auto;
  }

  .app--nod-nok .nn-step {
    width: fit-content;
    max-width: 100%;
    min-width: min(100%, 20rem);
  }

  .app--nod-nok .nn-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;
  }
}

@media (max-width: 520px) {
  .app--nod-nok .nn-ops {
    grid-template-columns: 1fr;
  }

  .app--nod-nok .nn-tab {
    min-height: 48px;
    padding: 0.45rem 0.55rem;
    gap: 0.35rem;
  }

  .app--nod-nok .nn-tab__icon {
    font-size: 1rem;
  }

  .app--nod-nok .nn-workspace {
    padding: var(--space-3);
  }
}

@media (max-width: 360px) {
  .app--nod-nok .nn-tab__icon {
    display: none;
  }

  .app--nod-nok .nn-back {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .app--nod-nok .nn-confetti,
  .app--nod-nok .trainer-quiz-confetti {
    display: none;
  }

  .app--nod-nok * {
    transition: none !important;
    animation: none !important;
  }
}