.btn 
{
    height: 100px;
    width: 100px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    right: 20px;
    bottom: 20px;
}

.icone 
{
    width: 50px;
    cursor: pointer;
}
body
{
background-color: khaki;
}f

h1
{
text-align: center;
text-decoration: underline;
}

a
{
color: deepskyblue;
}

h1
{
color: lightseagreen
}

img.Moviestarplanet_jeu.png
{
display: block;   
margin-left: auto;
margin-right: auto
}

div.lien
{
  text-align: center;  
  border-radius: 10px;
  background-color:#ccbbff;
  width: 20pc;
  margin: auto;
  margin-top: 10px;
  font-weight: bold;
  font-size: 30px;
}

div.lien a
{
 text-decoration: none; 
 color: #ffffcc;  
}

h2
{
color: cornflowerblue; 
text-decoration: underline;
} 

h4
{
color: red;
}

h1
{
text-decoration: underline;
}