body{
  margin: 0;
  padding: 0;
}

h1{
  text-align: center;
}

section{
  width: 50%;
  margin: auto;
}

section div#startButtons{
  width: 60%;
  margin: auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

#form{
  display: none;
  width: 60%;
  margin: auto;
}

#form input, #form button{
  width: 100%;
  margin-top: 1.5rem;
}

#indice{
  text-align: center;
  margin-top : 2rem;
}

#oldValue{
  margin-top: 2rem;
  display: none;
}

#oldValue h3{
  text-align: center;
}

#proposition{
  width: 100%;
  text-align: center;
  overflow: auto;
}