.top-banner {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: #333;
  color: white;
  font-size: xx-large;
  text-align: center;
  padding: 10px 0;
  z-index: 9999;            /* pour rester au-dessus du contenu */
  font-weight: bold;
}

.top-banner a {
  color: white;
  text-decoration: none;
}

body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    padding-top: 100px; 
}

h1 {
    background-color: #333;
    color: white;
    padding: 20px;
}

h2 {
    background-color: #333;
    color: white;
    padding: 15px;
    width: 80%;
}

h3 {
    background-color: #333;
    color: white;
    padding: 10px;
    width: 60%;
}

p {
    font-size: 18px;
    margin-bottom: 20px;
}

ul {
    list-style-type: none;
    padding: 0;
}

ul li {
    margin: 10px 0;
}

a {
    text-decoration: none;
    font-size: 20px;
    color: #333;
    background-color: #ddd;
    padding: 10px 20px;
    border-radius: 5px;
    display: inline-block;
}

a:hover {
    background-color: #bbb;
}

table {
    margin: 0 auto; /* Centre le tableau horizontalement */
    border-collapse: collapse;
    width: 60%; /* Ajuste la largeur si nécessaire */
}

td, th {
    padding: 10px;
    text-align: center;
}

.valeur-totale {
    color: green;
    font-weight: bold;
}

.enlevement {
    margin: 25px;
    color: white;
    background-color: green;
    border-color: orange;
    border-style: solid;
    border-radius: 2px;
    padding: 25px;
    font-size: x-large;
}

.banniere {
    width: 100%;
}

.menu {
    background-color: #333;
}

.bouton {
    margin: 25px;
    color: white;
    background-color: #333;
    border-color: gray;
    border-style: solid;
    border-radius: 2px;
    padding: 25px;
    font-size: x-large;
}

.bouton:hover {
    background-color: gray;
}

#btn-retour {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 9999;
  background-color: white;
  border-radius: 50%;
  padding: 5px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
  transition: transform 0.2s ease;
}

#btn-retour img {
  display: block;
  width: 30px;
  height: auto;
}

/* 🔍 Agrandissement au survol */
#btn-retour:hover {
  transform: scale(1.2);
}