body {
    background-image: url("image\ math.jpeg");
    background-size: cover;
    text-align: center;
    font-family:cursive ;
}

.titre {
  text-decoration-line: underline;
  text-decoration-color: red;
}

.soutitre {
  padding-top: 100px;
}

hr {
  color: #FF0000;
  height: 1.4px;
  background-color: red;

}
li {
  color: blue;
}

.page {
  background-image: url("cahier3.png"); 
  border: none;
  border-radius: 15px;
  color: blue;
  padding: 25px 25px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  box-shadow: 0px 22px 60px 0 black;
}

.liens {
  column-count: 2;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  font-size: 16px;
  
  }

  #B {
    padding-top: 1px;
  }