.fade-in-letter {
  opacity: 0 !important;
  transition: opacity 0.24s !important;
  display: inline !important;
}
.fade-in-letter.visible {
  opacity: 1 !important;
}


#muscle-instruction {
  word-break: break-word;
  white-space: normal;
}



.relax-tab.active {
  /* Light mode */
  background: rgba(255,255,255,0.80);
  box-shadow: 0 2px 8px 0 rgba(30,32,39,0.07);
  color: #1e293b !important; /* slate-800 */
  
  /* Dark mode override */
}
.dark .relax-tab.active {
  background: rgba(51,65,85,0.5); /* slate-700 */
  color: #f3f4f6 !important;
  
}
.relax-tab {
  transition: background 0.2s, color 0.2s, border 0.2s;
}