/* CSS Document */
<style>
body {margin:0;font-family:Arial}

.topnav {
  overflow: hidden;
  background-color: #006699;
  width: 100%;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 3px 15px;
  text-decoration: none;
  font-size: 17px;
}

.active {
  background-color: #4CAF50;
  color: white;
}

.topnav .icon {
  display: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 17px;    
  border: none;
  outline: none;
  color: white;
  padding: 4px 6px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 2px 6px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

.dropdown-content a:hover {
  background-color: #ddd;
  color: black;
}

.dropdown:hover .dropdown-content {
  display: block;
}

@media screen and (max-width: 350px) {
  .topnav a:not(:first-child), .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 350px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {float: none;}
  .topnav.responsive .dropdown-content {position: relative;}
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }
}
<style>
* {
  box-sizing: border-box;
}

body {
  font-family: Arial;
  margin: auto;
  width: 942px;
  /* border: 1px solid #000000; */
  padding: 10px;   
  background-image: url("fond-bg2.png");
    
}

.bg {
	background: #ffffff !important;
  background-color: #ffffff;
  margin: auto;
  width: 982px;
  /* border: 1px solid #000000; */
  padding: 20px;    
}  

tbody {
  font-family: Arial;
  margin: auto;
  width: 982px;
  /* border: 1px solid #000000; */
  padding: 10px;  
   

}

.header {
  font-family: Arial;
  border: 1px solid #000000; 
  background: #ffffff !important;
  background-color: #ffffff;  
}

.message {
  font-family: Arial;
  border: 1px solid #000000;
  padding: 10px;    
	background: #ffffff !important;
  background-color: #ffffff;  
}

#wrapper {
	width: 1000px;
	background: #ffffff !important;
  background-color: #ffffff;  
}

table caption {
  background-color: #006699;
  color: white;
  width: 100%;
  padding: 10px;
  text-align: left;  
}

.button {
background-color: #006699;
border: none;
color: white;
padding: 20px 34px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 20px;
margin: 4px 2px;
cursor: pointer;
}

.flotte {
float:left;
}

/* le block conteneur */
.marquee-rtl {
  max-width: 30em;                      /* largeur de la fenêtre */
  margin: 1em auto 2em;
  border: 5px solid #ff9999;
  overflow: hidden;                     /* masque tout ce qui dépasse */
  box-shadow: 0 .25em .5em #CCC,inset 0 0 1em .25em #CCC;
}

/* le bloc défilant */
.marquee-rtl > :first-child {
  display: inline-block;                /* modèle de boîte en ligne */
  padding-right: 2em;                   /* un peu d'espace pour la transition */
  padding-left: 100%;                   /* placement à droite du conteneur */
  white-space: nowrap;                  /* pas de passage à la ligne */
  animation: defilement-rtl 15s infinite linear;
}

@keyframes defilement-rtl {
  0% {
    transform: translate3d(0,0,0);      /* position initiale à droite */
  }
  100% {
    transform: translate3d(-100%,0,0);  /* position finale à gauche */
  }
}

</style>