/* --- Frosted circular icon button (Apple Photos style) --- */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  background: var(--bg-overlay-btn);
  color: var(--text-primary);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  transition: all 0.2s var(--ease-apple, cubic-bezier(0.28, 0.11, 0.32, 1));
}
.icon-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}
.icon-btn:active {
  transform: scale(0.94);
}
.icon-btn-sm {
  width: 28px;
  height: 28px;
}