#top_buttons {
    display: flex;
    flex-direction: row;
    width: 90%;
    max-width: 1200px;
    justify-content: space-between;
    align-items: center;
 
    height: 14vh;/*---------------------------------------------main div 1---------------------------------------------*/
  }
  
  #homeBtn{   
    border-radius: 50%;
    transition: transform 0.7s;
    opacity: 0; 
    animation: fadeIn 1s ease-in-out forwards;
  } 
  
  #homeBtn img {
    height: 6vh;
    max-height: 60px;
  }
  
  #homeBtn:hover{
    transform: scale(1.3);
    cursor: pointer;
  }
  
  #backBtn{
    border-radius: 50%;
    transition: transform 0.7s;
    opacity: 0; 
    animation: fadeIn 1s ease-in-out forwards;
  }
  
  #backBtn img {
    height: 5vh;
    max-height: 40px;
  }
  
  #backBtn:hover{
    transform: scale(1.3);
    cursor: pointer;
  }



  #logo{
   
    transition: transform 0.6s;
    opacity: 0; 
    animation: fadeIn 1s ease-in-out forwards 0.5s;
}

#logo:hover{
    transform: scale(1.2);
    cursor: pointer;
   
   
}



@keyframes fadeIn {
  0% { opacity: 0; } /* start from completely transparent */
  100% { opacity: 1; } /* end with full opacity */
}
@keyframes zoomFadeIn {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}