/* ===== Break Apart (Subtraction) - Game Styles ===== */

.block-slot--left .numberblock {
  animation: walk-in-left 0.5s ease both;
}

.block-slot--right .numberblock {
  animation: walk-in-right 0.5s ease 0.3s both;
}

.clickable-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.15s ease;
  position: relative;
}

.clickable-block:hover {
  transform: scale(1.05);
}

.clickable-block-label {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-top: 6px;
  text-align: center;
  position: absolute;
  bottom: -28px;
  left: 50%;
  transform: translateX(-50%);
}

.equation-display .eq-start {
  color: var(--nb-5);
}

.equation-display .eq-minus {
  color: var(--nb-1);
}

.equation-display .eq-result {
  color: var(--correct);
}

.equation-display .eq-hidden {
  color: #ccc;
}

/* Hint button */
.hint-btn {
  background: var(--star-color);
  color: var(--text-dark);
  font-size: 1rem;
  padding: 8px 24px;
  min-width: auto;
  min-height: auto;
  margin-top: 4px;
}

/* Departing blocks animation */
.nb-unit.departing {
  transition: transform 0.5s ease, opacity 0.5s ease;
  transform: translateY(-70px) scale(0.4);
  opacity: 0;
}

/* Merge animation (subtraction: shrink to result) */
@keyframes slide-merge-left {
  to { transform: translateX(50px); opacity: 0.2; }
}
@keyframes slide-merge-right {
  to { transform: translateX(-50px); opacity: 0.2; }
}

.block-slot--merge-left .numberblock,
.block-slot--merge-left .clickable-block {
  animation: slide-merge-left 0.5s ease forwards !important;
}
.block-slot--merge-right .numberblock,
.block-slot--merge-right .clickable-block {
  animation: slide-merge-right 0.5s ease forwards !important;
}

.result-slot--merge .numberblock {
  animation: pop-in 0.4s ease !important;
}