*{
    margin: 0;
    padding: 0;
}
label{
    margin: 20px;
}
input{
    padding: 10px;
    margin: 10px;
}
.content{
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 80%;
    margin: 0 auto;
}
.datadonne{
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.datadonne_item{
    display: flex;
    justify-content: center;
    margin: 20px 0;
}
th{
    background-color: gray;
    padding: 10px;
}
td{
    text-align: center;
    padding: 5px;
}
td,i{
    color: black;
}
a{text-decoration: none;
    color: black;
}
/* page d'acceuil */
header{
    display: flex;
    background-color: black;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: black;
  }
  
  li {
    float: left;
  }
  
  li a {
    display: block;
    color: white;
    text-align: center;
    padding: 16px;
    text-decoration: none;
  }
  
  li a:hover {
    background-color: #333333;
  }
    
h1{
    color: white;
    
    font-size: 50px;
}
nav{
    margin-bottom: 30px;
}
/* page formulaire */
.form-groupe{
    display: flex;
    justify-content: center;
    align-items: center;
}
form{
    box-shadow: 2px 2px 2px #333333 , -2px -2px 2px #333333;
}