main.css

body {
  padding-top: 50px;
  background-color: #F2F2F2;
  font-family: serif;
  background-image: url('ressources/fond4.png');
  background-repeat: no-repeat;
  background-attachment: fixed;
}
h1 {
  color: #337ab7;
  font-size: 4em;
}
h2 {
  color: #337ab7;
}
h3 {
  color: #337ab7;
}
nav {
	font-size: 1.5em;
}
.navbar-brand {
	font-size: 1.1em;
}
.footer {
  /*position: fixed;*/
  left: 0;
  bottom: 0;
  width: 100%;
  color: #e6e6e6;
  text-align: left;
}

 #topBtn {
  display: none; /* Hidden by default */
  position: fixed; /* Fixed/sticky position */
  bottom: 20px; /* Place the button at the bottom of the page */
  right: 30px; /* Place the button 30px from the right */
  z-index: 99; /* Make sure it does not overlap */
  border: none; /* Remove borders */
  outline: none; /* Remove outline */
  /*background-color: red; /* Set a background color */
  color: black; /* Text color */
  cursor: pointer; /* Add a mouse pointer on hover */
  padding: 15px; /* Some padding */
  border-radius: 10px; /* Rounded corners */
  font-size: 18px; /* Increase font size */
}

.noselect {
  -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
     -khtml-user-select: none; /* Konqueror HTML */
       -moz-user-select: none; /* Old versions of Firefox */
        -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently
                                  supported by Chrome, Edge, Opera and Firefox */
}

.lead {
  text-align: justify;
  text-justify: inter-word;
}