/* ============================================================
   grammar.css — Grammar Workshop
   ============================================================ */

/* ── Page Layout ── */
.grammar-page {
  width: 100%;
  max-width: var(--max-w);
  padding: 32px var(--page-pad-x) 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
}

/* ── Header ── */
.grammar-header {
  text-align: center;
  margin-bottom: 28px;
  animation: fadeIn 0.5s ease-out both;
}

.grammar-header h1 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--clr-text);
  margin-bottom: 8px;
}

.grammar-header h1 span { color: var(--clr-primary); }

.grammar-header p {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  font-weight: 500;
  max-width: 440px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Category Grid ── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  width: 100%;
  max-width: var(--max-w);
  animation: fadeIn 0.5s ease-out 0.1s both;
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 12px 16px;
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition-bounce), box-shadow var(--transition);
  font-family: 'Raleway', sans-serif;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--cat-color, var(--clr-primary));
  opacity: 0;
  transition: opacity var(--transition);
}

.category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.category-card:hover::before { opacity: 1; }
.category-card:active { transform: scale(0.97); }

.category-emoji { font-size: 2rem; line-height: 1; }

.category-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.3;
}

.category-progress {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  padding: 2px 8px;
  margin-top: 4px;
}

/* ── Screens ── */
#screen-categories,
#screen-rules,
#screen-exercise {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Session Info Bar ── */
.category-label-badge {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

/* ── Rule List ── */
.rule-list {
  width: 100%;
  max-width: var(--max-w);
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
  animation: fadeIn 0.4s ease-out both;
}

.rule-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-family: 'Raleway', sans-serif;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition-bounce);
  text-align: left;
}

.rule-row:hover { border-color: var(--clr-primary-light); box-shadow: var(--shadow-sm); transform: translateX(3px); }
.rule-row:active { transform: scale(0.99); }

.rule-row__cefr {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.cefr-A1 { background: #DCFCE7; color: #16A34A; }
.cefr-A2 { background: #D1FAE5; color: #065F46; }
.cefr-B1 { background: #DBEAFE; color: #1E40AF; }
.cefr-B2 { background: #EDE9FE; color: #5B21B6; }
.cefr-C1 { background: #CFFAFE; color: #0891B2; }
.cefr-C2 { background: #FFE4E6; color: #BE123C; }

.rule-row__text { flex: 1; }

.rule-row__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-text);
  display: block;
}

.rule-row__title-es {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  display: block;
  margin-top: 2px;
}

.rule-row__status {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  flex-shrink: 0;
}

.rule-row__status--done { color: var(--clr-success); }

/* ── Empty State (no rules in category yet) ── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.empty-state__icon {
  font-size: 2.5rem;
  line-height: 1;
  margin-bottom: 8px;
}

.empty-state__msg {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text);
  margin: 0;
}

.empty-state__sub {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  margin: 0;
}

/* ── Exercise Screen ── */
#screen-exercise {
  max-width: var(--max-w);
}

.rule-title-badge {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--clr-text);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  text-align: center;
}

#screen-exercise .session-info-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

#screen-exercise .session-info-bar .back-btn {
  justify-self: start;
}

#screen-exercise .session-info-bar .cefr-badge {
  justify-self: end;
}

.cefr-badge {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* ── Phase Progress Bar ── */
.phase-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 16px 0 20px;
  width: 100%;
}

.phase-sep {
  font-size: 0.85rem;
  color: var(--clr-border);
  flex-shrink: 0;
  line-height: 1;
}

.phase-dot {
  display: flex;
  align-items: center;
  gap: 5px;
  flex: 0 0 auto;
  cursor: default;
}

.phase-dot-num {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--clr-border);
  color: var(--clr-surface);
  font-size: 0.68rem;
  font-weight: 800;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
}

.phase-dot-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  white-space: nowrap;
  transition: color var(--transition);
}

/* Active phase */
.phase-dot--active .phase-dot-num {
  background: var(--activity-clr, var(--clr-primary));
  transform: scale(1.15);
}
.phase-dot--active .phase-dot-label {
  color: var(--activity-clr, var(--clr-primary));
  font-weight: 800;
}

/* Done phase */
.phase-dot--done .phase-dot-num {
  background: var(--clr-success);
}
.phase-dot--done .phase-dot-label {
  color: var(--clr-success);
}

/* Mobile: only the active step shows its label */
@media (max-width: 520px) {
  .phase-dot-label { display: none; }
  .phase-dot--active .phase-dot-label { display: inline; }
  .phase-progress { gap: 5px; }
}

/* ── Re-entry Banner ── */
.reentry-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 14px;
  background: var(--clr-primary-light);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text);
  margin: 4px 0 20px;   /* consistent vertical rhythm — not glued to the phase title below */
  animation: fadeIn 0.3s ease-out both;
}

.reentry-icon { font-size: 1rem; flex-shrink: 0; }

/* ── Unified phase button system ──────────────────────────────────────────────
   Every FORWARD button is the same solid-blue button on the RIGHT; the single BACK button is the
   same shape/height in GRAY on the LEFT; the action row spreads them (space-between). */
.phase-actions.phase-actions--split { justify-content: space-between; }
/* Every button (forward AND back) carries a 1px border so the border-box height matches EXACTLY —
   the back button's visible gray border no longer makes it taller than the borderless forward ones. */
.primary-btn,
.secondary-btn,
.structured-next-btn,
.production-next-btn {
  border: 1px solid transparent;
}
/* All forward buttons share one look (override the outlined "secondary" and the smaller dynamic ones). */
.secondary-btn,
.structured-next-btn,
.production-next-btn {
  padding: 12px 24px;
  font-size: 0.9rem;
  color: #fff;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-dark) 100%);
  margin-top: 0;
}
.phase-back-btn {
  padding: 12px 24px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-text);
  background: var(--clr-surface, #f1f3f5);
  border: 1px solid var(--clr-border, #d1d5db);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: filter var(--transition), transform var(--transition-bounce);
}
.phase-back-btn:hover { filter: brightness(0.96); }
.phase-back-btn.hidden { display: none; }

/* ── Phase Section ── */
.phase-section {
  width: 100%;
  animation: fadeInScale 0.4s ease-out both;
}

.phase-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 0;
}

.phase-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--clr-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 800;
  border-radius: 50%;
  flex-shrink: 0;
}

.phase-name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--clr-text);
}

.phase-hint {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  margin-left: 2px;
}

/* ── Phase Actions ── */
/* Single vertical rhythm for a phase: every direct child of the visible section is spaced by ONE
   gap, so the header, card, counter, progress and action row all sit an equal distance apart (no
   per-element margins fighting each other). Keep this the ONLY source of vertical spacing here. */
.phase-section:not(.hidden) {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.phase-actions {
  margin-top: 0;   /* rhythm comes from the section gap, not a per-element margin */
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.primary-btn {
  padding: 12px 24px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-dark) 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: filter var(--transition), transform var(--transition-bounce);
}

.primary-btn:hover { filter: brightness(1.1); transform: scale(1.02); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.secondary-btn {
  padding: 12px 24px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-primary);
  background: var(--clr-primary-light);
  border: 2px solid var(--clr-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition-bounce);
}

.secondary-btn:hover { background: var(--clr-primary); color: #fff; transform: scale(1.02); }

/* ── PHASE 1: Dialogue Card ── */
.dialogue-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dialogue-turn {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.dialogue-speaker {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--clr-text-muted);
  min-width: 48px;
  padding-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.dialogue-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.dialogue-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--clr-text);
  line-height: 1.55;
}

/* L1 gloss under a target-language sentence (dialogue / structured input / production).
   Muted and lighter so it supports comprehension without competing with the target text. */
.dialogue-translation,
.structured-translation,
.production-translation {
  font-size: 0.82rem;
  font-weight: 400;
  font-style: italic;
  color: var(--clr-text-muted);
  line-height: 1.4;
}
/* structured/production translations sit inside their prompt box (gap-controlled) — no own margin */

/* All turns use full text color — the **word** chip provides sufficient contrast */

.dialogue-target {
  background: linear-gradient(135deg, rgba(124,58,237,0.15) 0%, rgba(37,99,235,0.1) 100%);
  border-radius: 4px;
  padding: 1px 4px;
  font-weight: 700;
  color: var(--clr-primary);
  border-bottom: 2px solid var(--clr-primary);
}

/* ── PHASE 2: Noticing ── */
.noticing-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 22px;                 /* separates question GROUPS (each question tight with its own box) */
}

/* Question + its answer box as one tight group. */
.noticing-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.noticing-question {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.noticing-num {
  font-size: 0.75rem;
  font-weight: 800;
  color: #fff;
  background: var(--clr-primary);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.noticing-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.55;
}

/* ── Noticing input (textarea per question) ── */
.noticing-input {
  display: block;
  width: 100%;
  margin: 0;                 /* spacing comes from .noticing-item gap, not per-element margins */
  padding: 10px 14px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text);
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  resize: none;
  outline: none;
  line-height: 1.5;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-sizing: border-box;
}

.noticing-input:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.noticing-input::placeholder { color: var(--clr-text-muted); opacity: 0.7; }

/* Row containing progress label + button */
.noticing-actions {
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* The "Answer N to continue" hint lives in the CENTER of the action row (back left, next right),
   so it never adds an extra vertical gap. Empty → removed entirely. */
.noticing-progress {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  text-align: center;
}
.noticing-progress:empty { display: none; }

.noticing-progress--partial { color: var(--clr-primary); }
.noticing-progress--done    { color: var(--clr-success); }

/* Disabled state for the secondary-btn */
.secondary-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── PHASE 3: Rule Card ── */
.rule-card {
  background: linear-gradient(135deg, rgba(124,58,237,0.06) 0%, rgba(37,99,235,0.04) 100%);
  border: 2px solid rgba(124,58,237,0.2);
  border-radius: var(--radius-xl);
  padding: 24px 22px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-text);
  line-height: 1.7;
}

.rule-card strong {
  font-weight: 800;
  color: var(--clr-primary);
}

.rule-card em {
  font-style: italic;
  color: var(--clr-text-muted);
}

.rule-card code {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: monospace;
  font-size: 0.9em;
  color: var(--clr-text);
}

/* Block-level elements emitted by parseMarkdown */
.rule-card p {
  margin: 0 0 10px;
}

.rule-card p:last-child {
  margin-bottom: 0;
}

.rule-card ul {
  margin: 0 0 10px;
  padding-left: 18px;
}

.rule-card li {
  margin-bottom: 5px;
  line-height: 1.55;
}

blockquote.rule-tip {
  margin: 12px 0 0;
  padding: 9px 14px;
  background: rgba(124,58,237,0.07);
  border-left: 3px solid var(--clr-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.9em;
  font-style: normal;
  color: var(--clr-text);
}

/* ── PHASE 3: Hypothesis + Divider ── */
.rule-hypothesis {
  margin-bottom: 4px;
}

.rule-hypothesis__heading {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin: 0 0 10px;
}

.rule-hypothesis__item {
  margin-bottom: 12px;
}

.rule-hypothesis__q {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  margin-bottom: 4px;
  line-height: 1.4;
}

.rule-hypothesis__a {
  margin: 0;
  padding: 8px 12px;
  background: var(--clr-surface-2);
  border-left: 3px solid var(--clr-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--clr-text);
  line-height: 1.5;
}

.rule-divider {
  height: 1px;
  background: var(--clr-border);
  margin: 18px 0;
  position: relative;
}

.rule-divider::after {
  content: attr(data-label);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--clr-card);
  padding: 0 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-primary);
}

/* ── PHASE 4: Structured Input ── */
.structured-counter {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 0;
  align-self: flex-start;
}

.structured-card {
  width: 100%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 22px;
  display: flex;              /* ONE gap governs the rhythm — children carry NO own vertical margin */
  flex-direction: column;
  gap: 16px;
  animation: fadeInScale 0.35s ease-out both;
}

/* The prompt = target sentence + its gloss as ONE boxed unit (referential items). */
.structured-prompt {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 16px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--clr-primary);
}

.structured-sentence {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.5;
}

/* Tag + question sit tight together as the item's header. */
.structured-qhead {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.structured-question {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.45;
}

.structured-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: 'Raleway', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--clr-text);
  text-align: left;
  transition: border-color var(--transition), background var(--transition), transform var(--transition-bounce);
}

.option-btn:hover:not(:disabled) { border-color: var(--clr-primary-light); transform: translateX(3px); }
.option-btn:disabled { cursor: not-allowed; }

.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--clr-surface-2);
  border-radius: 50%;
  font-size: 0.72rem;
  font-weight: 800;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}

.option-btn--correct { border-color: var(--clr-success); background: var(--clr-success-light); }
.option-btn--correct .option-letter { background: var(--clr-success); color: #fff; }
.option-btn--wrong   { border-color: var(--clr-danger);  background: var(--clr-danger-light);  opacity: 0.7; }
.option-btn--wrong .option-letter   { background: var(--clr-danger);  color: #fff; }
/* Affective item: the learner's pick is acknowledged, never marked right/wrong (any view is valid). */
.option-btn--chosen { border-color: var(--clr-primary); background: var(--clr-primary-light, rgba(37,99,235,0.08)); }
.option-btn--chosen .option-letter { background: var(--clr-primary); color: #fff; }

/* Affective structured-input tag ("Your view") — signals no right answer, react to real meaning.
   Lives inside .structured-qhead (gap-controlled), so it carries no own margin. */
.structured-affective-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.66rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-primary);
  background: var(--clr-primary-light, rgba(37,99,235,0.08));
  border-radius: var(--radius-full, 999px);
}

/* ── PHASE 6: Express (communicative / self-assessed production) ── */
/* Exercise counter — the SAME pill as structured/production, so all phases match. */
.express-counter {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 0;
  align-self: flex-start;
}
.express-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 22px 20px;
}
.express-prompt { font-size: 1.05rem; font-weight: 700; color: var(--clr-text); line-height: 1.5; }
.express-hint { margin-top: 6px; font-size: 0.85rem; color: var(--clr-text-muted); }
.express-input {
  width: 100%;
  margin-top: 14px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--clr-text);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md, 10px);
  resize: vertical;
}
.express-input:focus { outline: none; border-color: var(--clr-primary); }
.express-model-btn {
  margin-top: 14px;
  padding: 9px 18px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-primary);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-primary);
  border-radius: var(--radius-full, 999px);
  cursor: pointer;
  transition: background var(--transition, .2s);
}
.express-model-btn:hover:not(:disabled) { background: var(--clr-primary-light, rgba(37,99,235,0.08)); }
.express-model-btn:disabled { opacity: 0.5; cursor: default; }
.express-model {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--clr-primary-light, rgba(37,99,235,0.06));
  border-left: 3px solid var(--clr-primary);
  border-radius: 0 var(--radius-md, 10px) var(--radius-md, 10px) 0;
}
.express-model-label {
  font-size: 0.62rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-text-muted);
  margin-bottom: 4px;
}
.express-model-text { font-size: 1.05rem; font-weight: 600; color: var(--clr-text); line-height: 1.5; }
.express-model-translation { margin-top: 4px; font-size: 0.85rem; font-style: italic; color: var(--clr-text-muted); }
.express-selfcheck { margin-top: 12px; font-size: 0.85rem; font-weight: 600; color: var(--clr-text); }
.express-next-btn {
  padding: 10px 22px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: var(--clr-primary);
  border: none;
  border-radius: var(--radius-full, 999px);
  cursor: pointer;
}

.structured-feedback {
  padding: 10px 14px 10px 38px;
  background: var(--clr-success-light);
  border-left: 3px solid var(--clr-success);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.5;
  position: relative;
  animation: fadeIn 0.3s ease-out both;
}

.structured-feedback--wrong {
  background: var(--clr-danger-light);
  border-left-color: var(--clr-danger);
}

.structured-feedback::before {
  content: '💡';
  position: absolute;
  left: 12px;
  top: 10px;
}

/* Next button after structured-input answer — same style as production-next-btn */
.structured-next-btn {
  margin-top: 0;
  padding: 12px 24px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-dark) 100%);
  border: 1px solid transparent;   /* match the back button's border-box height */
  border-radius: var(--radius-md);
  cursor: pointer;
  animation: fadeIn 0.25s ease-out both;
  transition: filter var(--transition);
}

.structured-next-btn:hover { filter: brightness(1.1); }
.structured-next-btn:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 3px;
}

/* ── PHASE 5: Production (FITB) ── */
.production-counter {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 0;
  align-self: flex-start;
}

.production-card {
  width: 100%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 22px;
  display: flex;              /* ONE gap governs the rhythm — children carry NO own vertical margin */
  flex-direction: column;
  gap: 16px;
  animation: fadeInScale 0.35s ease-out both;
}

/* Sentence (with the inline blank) + its gloss as ONE boxed prompt. */
.production-prompt {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 16px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--activity-clr, var(--clr-primary));
}

.production-sentence {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.6;
}

.production-sentence .blank {
  display: inline-block;
  min-width: 80px;
  border-bottom: 2px dashed var(--clr-primary);
  color: var(--clr-primary);
  font-style: italic;
}

.production-input-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.production-input {
  flex: 1;
  padding: 12px 16px;
  font-family: 'Raleway', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-text);
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.production-input:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.production-input:disabled { opacity: 0.6; cursor: not-allowed; }
.production-input--correct { border-color: var(--clr-success); background: var(--clr-success-light); }
.production-input--wrong   { border-color: var(--clr-danger);  }

/* Multi-blank: inputs rendered inline inside the sentence */
.production-sentence--multi {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px;
  line-height: 2;
}

.production-input--inline {
  display: inline-block;
  flex: 0 0 auto;
  padding: 3px 8px;
  font-family: 'Raleway', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text);
  background: var(--clr-surface);
  border: none;
  border-bottom: 2px solid var(--activity-clr, var(--clr-primary));
  border-radius: 0;
  outline: none;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.production-input--inline:focus {
  border-bottom-color: var(--clr-primary);
  box-shadow: 0 2px 0 0 rgba(37,99,235,0.25);
}

.production-input--inline:disabled { opacity: 0.7; cursor: not-allowed; }
.production-input--inline.production-input--correct { border-bottom-color: var(--clr-success); background: var(--clr-success-light); border-radius: 4px; }
.production-input--inline.production-input--wrong   { border-bottom-color: var(--clr-danger); }

.production-input-row--check-only {
  justify-content: flex-end;
  margin: 0;                 /* only the card gap spaces the button — no extra top/bottom margin */
}

.production-check-btn {
  padding: 12px 20px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-dark) 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  transition: filter var(--transition), transform var(--transition-bounce);
}

.production-check-btn:hover:not(:disabled) { filter: brightness(1.1); transform: scale(1.03); }
.production-check-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Feedback for FITB */
.production-feedback {
  padding: 14px 16px 14px 40px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.55;
  position: relative;
  animation: fadeIn 0.3s ease-out both;
  display: none;
}

.production-feedback.visible { display: block; }

.production-feedback--correct {
  background: var(--clr-success-light);
  border-left: 3px solid var(--clr-success);
  color: var(--clr-text);
}

.production-feedback--wrong {
  background: var(--clr-danger-light);
  border-left: 3px solid var(--clr-danger);
  color: var(--clr-text);
}

.production-feedback::before {
  position: absolute;
  left: 12px;
  top: 13px;
  font-size: 1rem;
}

.production-feedback--correct::before { content: '✓'; color: var(--clr-success); font-weight: 900; }
.production-feedback--wrong::before   { content: '✗'; color: var(--clr-danger);  font-weight: 900; }

.feedback-answer {
  font-weight: 800;
  color: var(--clr-success);
  display: block;
  margin-bottom: 4px;
}

.feedback-why {
  display: block;
  margin-bottom: 4px;
}

.feedback-contrast {
  display: block;
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  border-top: 1px solid rgba(0,0,0,0.07);
  margin-top: 8px;
  padding-top: 8px;
}

.feedback-contrast::before { content: '↔ '; }

.production-next-btn {
  margin-top: 0;
  padding: 12px 24px;
  font-family: 'Raleway', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-dark) 100%);
  border: 1px solid transparent;   /* match the back button's border-box height */
  border-radius: var(--radius-md);
  cursor: pointer;
  display: none;
  transition: filter var(--transition);
}

.production-next-btn.visible { display: inline-block; }
.production-next-btn:hover { filter: brightness(1.1); }

/* ── Complete Card ── */
.complete-card {
  width: 100%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  text-align: center;
  animation: fadeInScale 0.5s ease-out both;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.complete-icon { font-size: 3rem; margin-bottom: 10px; }

.complete-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-text);
  margin-bottom: 6px;
}

.complete-score {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  margin-bottom: 20px;
}

/* ── Auto-rating display ── */
.auto-rating {
  width: 100%;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.auto-rating__label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--clr-text-muted);
}

.auto-rating__badge {
  font-size: 1.4rem;
  font-weight: 800;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
}

.badge--easy {
  background: var(--clr-success-light);
  color: var(--clr-success);
  border-color: var(--clr-success);
}

.badge--ok {
  background: #DBEAFE;
  color: #1E40AF;
  border-color: #1E40AF;
}

.badge--hard {
  background: var(--clr-danger-light);
  color: var(--clr-danger);
  border-color: var(--clr-danger);
}

.auto-rating__basis {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--clr-text-muted);
}

/* Primary save button */
.auto-save-btn {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  margin-bottom: 20px;
}

/* ── Override section ── */
.override-section {
  width: 100%;
  border-top: 1px solid var(--clr-border);
  padding-top: 16px;
}

.override-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  margin-bottom: 10px;
}

/* ── Related Phrases (complete card — bridge to other activities) ── */
.related-phrases {
  width: 100%;
  margin-top: 24px;
  border-top: 1px solid var(--clr-border);
  padding-top: 20px;
  text-align: left;
  animation: fadeIn 0.4s ease-out both;
}

.related-heading {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-text-muted);
  margin-bottom: 12px;
}

.related-phrase-item {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-phrase-text {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.5;
  border-left: 3px solid var(--activity-clr, var(--clr-primary));
  padding-left: 10px;
}

.related-topic-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--activity-clr, var(--clr-primary));
  padding-left: 13px;
}

.related-activity-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-left: 13px;
}

.related-practice-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--activity-clr-light, var(--clr-primary-light));
  color: var(--activity-clr, var(--clr-primary));
  font-size: 0.78rem;
  font-weight: 700;
  font-family: 'Raleway', sans-serif;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  border: 1px solid transparent;
}

.related-practice-btn:hover {
  background: var(--activity-clr, var(--clr-primary));
  color: #fff;
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .grammar-page { padding: 20px var(--page-pad-x) 48px; }
  .category-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .category-card { padding: 16px 10px 12px; }
  .dialogue-turn { flex-direction: column; gap: 4px; }
  .dialogue-speaker { min-width: auto; }
  .production-input-row { flex-direction: column; }
  .phase-hint { display: none; }
}