form{
    display: flex;
    flex-flow: column;
    align-items: center;
    width: 500px;
    border: solid 3px white;
    margin: auto;
    padding: 20px 0 20px 0;
  }
  
  input[type=text]{
    width: 300px;
    padding: 0.5em;
    margin: 1em;
    clip-path: polygon(0 0, 0 100%, 100% 100%, 100% 50%, 93% 0);
  }
  
  input[type=text]:focus{
    background-color: black;
    color: white;
    border: solid 2px white;
  }
  
  input[type=submit]{
    color: white;
    font-family: 'Jura', sans-serif;
    background-color: black;
    border: none;
  }

  .bouton{
    animation: flicker 2.5s infinite alternate;
    color: white;
    text-align: center;
    min-width: 200px;
    max-width: 700px;
    height: 100px;
    font-size: 4em;
  }
  
select{
  display: none;
}

  .bouton:hover{
    cursor: pointer;
  }
  @keyframes flicker {
      0%,19%,21%,23%,25%,54%,56%,to {
          text-shadow: -.2rem -.2rem 1rem #fff,.2rem .2rem 1rem #fff,0 0 2rem #0016ee,0 0 4rem #0016ee,0 0 6rem #0016ee,0 0 8rem #0016ee,0 0 10rem #0016ee;
          box-shadow: 0 0 .5rem #fff,inset 0 0 .5rem #fff,0 0 2rem #fe00fe,inset 0 0 2rem #fe00fe,0 0 4rem #fe00fe,inset 0 0 4rem #fe00fe
      }
  
      20%,24%,55% {
          text-shadow: none;
          box-shadow: none
      }
  }