.main-container{
width: 60%;
}
.left-container{
  width: 50%;
  margin: 0;
  float: left;
}
.twitter-container{
  width: 50%;
  margin: 0;
  float: left;
}

.twitter-icon img{
  opacity: 0.5;
}
.twitter-icon:hover img{
  opacity: 0.9;
}