.banner{
  height: 90px;
  width: 700px;
  margin-top: 5%;
  margin-bottom: 5%;
  }
  .centrer{
    justify-content: center;
  }
  main{
    width: 70%;
  }
  p a{
    text-decoration: none;
    color: #888;
    transition: color 0.3s;
  }
  p a:hover{
    text-decoration: none;
    color: #0fabe8;
  }