/*css hexa*/
h1 {
  text-align: center;
  color: red;
  text-decoration: underline;
}
#titre1{
  position: relative;
  overflow: auto;
  margin: auto;
  margin-top: 150px; 
}

body {
  background-image: url("matrix.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: white;
  font-family: Arial, sans-serif;
  padding: 20px;
}
.boite1 {
  width: 900px;
  height: 150px;
  position: relative;
  overflow: auto;
  margin: auto;
  margin-top: 10px; 
  border: 2px solid;
  padding: 15px;
  border-radius: 10px;
}
.boite2 {
  width: 470px;
  height: 360px;
  position: relative;
  overflow: auto;
  margin: auto;
  margin-top: 10px; 
  border: 2px solid;
  padding: 15px;
  border-radius: 10px;
}
.centretexte{
    text-align: center;
    color:red;
}
#hexabinaire{
  width:450px;
  height:350px;
}

#bendix{
  height:350px;
}
#img-container {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}

#img-container img {
  max-width: 45%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

nav {
  position: fixed; /* Fixe le bandeau en haut de la page */
  top: 0;
  left: 0;
  width: 100%;
  background-color: #15A102; 
  z-index: 1000; /* pour qu'il soit au-dessus de tout contenu */
  padding: 10px 0;
  filter: opacity(80%);/*permet de modifier l'opacité*/

}
/*permet de faire l'affichage à la suite*/
nav ul {
  margin: 0;
  padding: 0;
  display: flex;
  width: 100%;
}

nav li {
  flex: 1;
  text-transform: uppercase;
  text-align: center;
  list-style-type: none;
}

nav a {
  text-decoration: none;
  color: black;
  display: block;
  padding: 10px;
}

nav a:hover {
  background-color: #4EE051;
  color: white;
}