html {
  background-color: #4CBB1D ;
  background-size: 110%;
  background-attachment: fixed;
}


body {
}

.main_box {
  display: grid;
  grid-row: 2/3; /* Haut en bas*/
  grid-column: 1/2; /* gauche a droite */
  grid-gap: 10px;
  align-content: flex-start;
}

h1{
  text-align : center;
  color : black;
  font-family: monospace;
  font-size : 40px;
}

h2{
  text-align : center;
  color : black;
  font-family: monospace;
  font-size : 30px;
}

img{
  display:block;
  margin:0 auto;
}