/* ===== STAMP PICKER UI ===== */
.stamp-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}
.stamp-cat-btn {
  padding: 4px 8px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  background: #fafafa;
  font-size: 12px;
  transition: border-color 0.15s;
}
.stamp-cat-btn:hover { border-color: #ffb74d; }
.stamp-cat-btn.active { border-color: #ff9800; background: #fff3e0; }
.stamp-cat-btn.locked {
  opacity: 0.5;
  position: relative;
  cursor: default;
  background: #f0f0f0;
  border-color: #ccc;
}
.stamp-cat-btn.locked::after {
  content: '🔒';
  font-size: 10px;
  margin-left: 2px;
}

.stamp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
}
.stamp-item {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  background: #fafafa;
  cursor: grab;
  transition: border-color 0.15s, transform 0.1s;
  user-select: none;
  -webkit-user-select: none;
}
.stamp-item:hover { border-color: #ffb74d; transform: scale(1.12); }
.stamp-item:active { cursor: grabbing; }

/* Locked stamps — visible but not usable */
.stamp-item.stamp-locked {
  cursor: not-allowed;
  opacity: 0.4;
  filter: grayscale(0.6);
  border-color: #ddd;
  background: #f5f5f5;
  position: relative;
}
.stamp-item.stamp-locked:hover {
  border-color: #ddd;
  transform: none;
}
.stamp-item.stamp-locked::after {
  content: '🔒';
  position: absolute;
  bottom: -2px;
  right: -2px;
  font-size: 10px;
  line-height: 1;
}