body {
     background-color: rgb(4, 4, 4);
     color: #ffffff;
     margin: 0px;
     font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}
h2 {
     color: rgb(209, 209, 18);
     font-size: 30px;
     text-align: center;
     font-weight: bold;
}
p {
     text-align: center;
     font-size: 20px;
}
h1 {
     color: rgb(209, 209, 18);
     font-size: 50px;
     text-align: center;
}
a {
     color: rgb(209, 209, 18);
     text-decoration: none;
}

.retourindex {
     display: flex;
     justify-content: center;
     align-items: center;
     margin-top: 20px;
     font-size: 20px;
     padding: 20px;
     color: rgb(209, 209, 18);
     border: #ffffff 1px solid;
     border-radius: 10px;
     width: 700px;
     margin-left: auto;
     margin-right: auto;
}
.retourindex:hover {
     background-color: rgb(8, 8, 8);
     color: rgb(209, 209, 18);
     transition: 0.3s;
}