p {
  margin-top: 0px;
  }
 
fieldset {
  margin-bottom: 15px;
  padding: 10px;
}
 
legend {
  padding: 0px 3px;
  font-weight: bold;
  font-variant: small-caps;
}
 
label {
  width: 150px;
  display: inline-block;
  vertical-align: top;
  margin: 6px;
}
 
em {
  font-weight: bold;
  font-style: normal;
  color: #f00;
}
 
input:focus {
  background: #eaeaea;
}
 
input, textarea {
  width: 280px;
}
 
textarea {
  height: 120px;
}
select {
  width: 250px;
}
 input[type=submit] {
  width: 180px;
  padding: 10px;
  display: block;
    position: relative;
    margin-left: auto;
  margin-right: auto;
}
body {
width: 500px;
height:200px;
margin-right: auto;
margin-left: auto;
}

.gros
 {
font-size: 24px;
text-align: center;
 }
.centrer  {
 font-size: 22px;
    margin-left: auto;
    margin-right: auto;
}