.dön{
    background-color: #4c3db2;
    
    margin-left: 10px;
    margin-top: 10px;
  width: 150px;
  height: 50px;
  float: left;
  font-size: 20px;
  text-decoration: none;
  font-family: Arial, Helvetica, sans-serif;
  transition: all 1s;
  border-radius: 40px;
      text-align: center;
      padding: 10px;
  
  }
  .dön:hover{
    background-color: #00f8f8;
    opacity: 0.5;
    margin-left: 10px;
    margin-top: 10px;
  width: 150px;
  height: 50px;
  float: left;
  font-size: 20px;
  text-decoration: none;
  font-family: Arial, Helvetica, sans-serif;
  transition: all 1s;
  border-radius: 40px;
      text-align: center;
      padding: 10px;
  
  }


.hakında{
    width:1000px ;
    height: 700px ;
    
    margin: auto;
    font-size: 20px;
    text-decoration: none;
    font-family: Arial, Helvetica, sans-serif;
    transition: all 1s;
    border-radius: 40px;
        text-align: center;
        padding: 10px;
        color: black;
        margin-top: 50px;
        border-style: solid;
        border-color: #4374a8;
       
    }
    .kutu{
        height: 500px;
        width: 500px;
        margin-left: auto;
       margin-right: auto;
        background-color: #4374a8;
    }