/**
 * Center aligned placeholder text
 */

body {
   margin:50px 0px; padding:0px;
  text-align:center;  
  color:white;
  font-size: 50px;
    font-family: Arial, Helvetica, sans-serif;
  background-color: black;
  background-image: url(visuel_logiciel.jpg);
  background-attachment: fixed;
  background-repeat:no-repeat;
  background-position:center center;
}

form {
    display: inline-block;
    width: 70%;
}

input[type=number] {
    display: block;
    width: 60%;
    box-sizing: border-box;
    border: 2px solid #ccc;
    border-radius: 0.4em;
    font-size: 60px;
    background-color: white;
    background-image: url('cadenas-01.png');
    background-position: 30% 50%;
    background-repeat: no-repeat;
    padding-top: 24px;
    padding-bottom: 24px;
    padding-left: 30%;

}

input[type=submit] {
  text-align:center; 
  box-sizing: border-box;
  width: 60%;
  padding: 1em;
  background-color: black;
  border:none;
  border-radius: 0.5em;
  text-align: center;
  color: white;
  size: 40em;
  font-size: 40px;
  
}



/*
::-webkit-input-placeholder {
   color: white;
   text-align: center;

}

:-moz-placeholder {
   color: white;
   text-align: center;

}*/