body{
  background-color: black;
  color: white;
padding-bottom: 50px; /* Pour que le contenu ne passe pas sous le footer */
background-image: url(20.jpg);
    background-size: cover;
    background-position: center;
    width: 100%;
    background-attachment: fixed;
}

header{
  color: White;
  text-align: center;
}

h3{
  color: green;
}

h4{
  color: yellow;
  text-decoration: underline;
}

p1{
  font-size: 15px;
  margin-left: 20px;
  margin-top: 30px;
}

div{
 font-size: 14px;
 margin-left: 50px;
}

footer{
  color: white;
  position: fixed;
  bottom: 0;
  left: 0;
  text-align: center;
  padding: 10px 0;
width: 100%;
}

main{
  text-align: center;
}

button{
  color: black;
  background-color: blue;
  border-radius: 20px;
  padding: 10px;
  text-decoration: none;
  
}

footer{
  color: brown;
  text-align: center;
  padding: 0px;
  background: grey;
  margin-top: 50px;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

  a {
    color: #0077cc;
    text-decoration: none;
    font-weight: bold;
  }

  a:hover {
    text-decoration: underline;
  }
html{
  font-family: Times New Roman;
}
p{
 text-indent: 30px; 
}