.df {
    display: flex;
  }
  
  .dfa {
    display: flex;
    align-items: center;
  }
  
  .dfc {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .dfb {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .dfsa {
    display: flex;
    align-items: center;
    justify-content: space-around;
  }