body.mainpage {
   background-color: #f7f7f7
}

.mainlogo {
   display: block; 
   margin-left: auto; 
   margin-right: auto; 
   width: 50%
}

.button1 {
   position: absolute; 
   right: 50px; 
   bottom: 50px
}
  
.button2 {
   position: absolute; 
   right: 145px; 
   bottom: 50px
}

.button3 {
   position: absolute; 
   right: 235px; 
   bottom: 50px
}