/* kit-cascade.css — révélation séquentielle + mode interactive (P3 / C2).

   Deux modes :
   - Défaut : bouton "Vérifier" qui révèle l'étape suivante (legacy, intact).
   - Interactive : opt-in via [data-cascade-mode="interactive"] sur [data-cascade].
     Chaque étape demande la saisie d'une valeur numérique, validée avec
     tolérance, puis révèle la suivante. Mini bloc-note de calcul intégré
     (parseur d'expression simple : + - × * / ()) pour aider l'user à poser
     ses opérations sans changer de fenêtre. */

.kit-cascade-step {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 350ms ease, transform 350ms ease, max-height 400ms ease;
  max-height: 0;
  overflow: hidden;
  pointer-events: none;
}
.kit-cascade-step[data-revealed="1"] {
  opacity: 1;
  transform: translateY(0);
  max-height: 1200px;
  pointer-events: auto;
}
.kit-cascade-step--first { opacity: 1; transform: none; max-height: 1200px; pointer-events: auto; }

.kit-cascade-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.95rem;
  border-radius: 0.45rem;
  background: rgba(251,191,36,0.15);
  border: 1px solid rgba(251,191,36,0.45);
  color: #fde68a;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 150ms;
}
.kit-cascade-btn:hover {
  background: rgba(251,191,36,0.28);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(251,191,36,0.20);
}
.kit-cascade-btn[data-locked="1"] {
  background: rgba(52,211,153,0.15);
  border-color: rgba(52,211,153,0.45);
  color: #a7f3d0;
  cursor: default;
  transform: none;
  box-shadow: none;
}

/* ========================================================================
   Mode interactive — input réponse + feedback
   ======================================================================== */
.kit-cascade-answer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.6rem;
}
.kit-cascade-answer-label {
  font-size: 0.8rem;
  color: #cbd5f5;
  font-weight: 600;
}
.kit-cascade-input {
  flex: 0 1 180px;
  min-width: 110px;
  padding: 0.45rem 0.65rem;
  border-radius: 0.4rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.35);
  color: #f9fafb;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 150ms, background 150ms;
}
.kit-cascade-input:focus {
  border-color: rgba(251, 191, 36, 0.55);
  background: rgba(0, 0, 0, 0.55);
}
.kit-cascade-input[data-state="ok"] {
  border-color: rgba(52, 211, 153, 0.65);
  background: rgba(52, 211, 153, 0.10);
  color: #d1fae5;
}
.kit-cascade-input[data-state="ko"] {
  border-color: rgba(244, 63, 94, 0.65);
  background: rgba(244, 63, 94, 0.10);
  color: #fecdd3;
  animation: kit-shake 350ms;
}
.kit-cascade-unit {
  font-size: 0.78rem;
  color: #94a3b8;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.kit-cascade-feedback {
  font-size: 0.78rem;
  color: #94a3b8;
  margin-top: 0.4rem;
  min-height: 1em;
}
.kit-cascade-feedback[data-state="ok"] { color: #6ee7b7; }
.kit-cascade-feedback[data-state="ko"] { color: #fca5a5; }
.kit-cascade-feedback[data-state="hint"] { color: #fbbf24; }

/* ---- Mini bloc-note calc ---- */
.kit-cascade-calc {
  margin-top: 0.7rem;
  border: 1px dashed rgba(251, 191, 36, 0.30);
  background: rgba(251, 191, 36, 0.04);
  border-radius: 0.5rem;
  padding: 0.55rem 0.65rem;
}
.kit-cascade-calc-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #fde68a;
  font-weight: 700;
  margin-bottom: 0.45rem;
}
.kit-cascade-calc-row {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}
.kit-cascade-calc-input {
  flex: 1;
  min-width: 0;
  padding: 0.4rem 0.55rem;
  border-radius: 0.35rem;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(0, 0, 0, 0.45);
  color: #f9fafb;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.82rem;
  outline: none;
}
.kit-cascade-calc-input:focus {
  border-color: rgba(251, 191, 36, 0.55);
}
.kit-cascade-calc-result {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.82rem;
  color: #fde68a;
  font-weight: 700;
  white-space: nowrap;
  padding: 0.25rem 0.45rem;
  border-radius: 0.3rem;
  background: rgba(251, 191, 36, 0.10);
  min-width: 70px;
  text-align: right;
}
.kit-cascade-calc-result[data-empty="1"] { color: #64748b; background: rgba(255, 255, 255, 0.03); }
.kit-cascade-calc-result[data-err="1"] { color: #fca5a5; background: rgba(244, 63, 94, 0.10); }
.kit-cascade-calc-push {
  padding: 0.35rem 0.6rem;
  border-radius: 0.35rem;
  background: rgba(34, 211, 238, 0.15);
  border: 1px solid rgba(34, 211, 238, 0.45);
  color: #a5f3fc;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 150ms;
}
.kit-cascade-calc-push:hover:not(:disabled) {
  background: rgba(34, 211, 238, 0.28);
}
.kit-cascade-calc-push:disabled { opacity: 0.4; cursor: not-allowed; }
.kit-cascade-calc-hint {
  font-size: 0.68rem;
  color: #94a3b8;
  margin-top: 0.35rem;
  font-style: italic;
}

/* ---- Hint progressif (multi-niveau) ---- */
.kit-cascade-hint-btn {
  background: none;
  border: none;
  color: #fbbf24;
  font-size: 0.72rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 0.3rem;
  transition: background 150ms;
}
.kit-cascade-hint-btn:hover { background: rgba(251, 191, 36, 0.12); }
.kit-cascade-hints {
  margin-top: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.kit-cascade-hint {
  display: none;
  font-size: 0.78rem;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.08);
  border-left: 2px solid rgba(251, 191, 36, 0.5);
  padding: 0.35rem 0.55rem;
  border-radius: 0 0.3rem 0.3rem 0;
}
.kit-cascade-hint[data-revealed="1"] { display: block; }