/* RedFeed — navegação iPhone / iOS (voltar visual + gesto) */
html[data-rf-ios="1"] .rf-ios-back-btn {
  position: fixed;
  left: max(10px, env(safe-area-inset-left));
  top: max(10px, env(safe-area-inset-top));
  z-index: 2147483005;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(12, 12, 18, 0.72);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1rem;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  transition: opacity 0.2s ease, transform 0.15s ease;
}
html[data-rf-ios="1"] .rf-ios-back-btn:active {
  transform: scale(0.94);
}
html[data-rf-ios="1"] .rf-ios-back-btn[hidden] {
  display: none !important;
}
html[data-rf-ios="1"] body.rf-story-page .rf-ios-back-btn,
html[data-rf-ios="1"] body.rf-studio-immersive .rf-ios-back-btn,
html[data-rf-ios="1"] body.rf-feed-reels-open .rf-ios-back-btn,
html[data-rf-ios="1"] body.rf-comments-open .rf-ios-back-btn,
html[data-rf-ios="1"] body.rf-share-open .rf-ios-back-btn,
html[data-rf-ios="1"] body.rf-dm-thread-open .rf-ios-back-btn,
html[data-rf-ios="1"] body.rf-redfeed-home .rf-ios-back-btn {
  display: none !important;
}
html[data-rf-ios="1"] .rf-ios-edge-hint {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  z-index: 2147483004;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(90deg, rgba(255, 23, 77, 0.55), transparent);
  transition: opacity 0.15s ease;
}
html[data-rf-ios="1"] .rf-ios-edge-hint.on {
  opacity: 1;
}