<style>
h1, h2, h3, h4, h5, h6 {
  font-family: Verdana, "DejaVu Sans", "Bitstream Vera Sans", Geneva, sans-serif;
  font-weight: bold;
}
body, intro, introE, rq, rqE, ex, exE, app, appE, sol  {
  font-family: Verdana, "DejaVu Sans", "Bitstream Vera Sans", Geneva, sans-serif;
  font-weight: 400;
  font-size: 12px;
}
h1 {
  border: 0 solid #333;
  padding: 30px ;
  color: white;
  background: #b11d01;
  text-align: center;
}
h2 {
  border: 3px solid #333;
  padding: 18px ;
  color: #b11d01;
  background: #ffffff;
  text-align: center;
}
h3 {
  border: 0 solid #333;
  padding: 12px ;
  color: #000000;
  background: #c1c1c1;
  text-align: left;
}
h4 {
  border: 0 solid #333;
  padding: 2px ;
  color: #000000;
  background: #d9fffc;
  text-align: left;
}
h5 {
  border: 1px solid #333;
  padding: 2px ;
  color: #000000;
  background: #ffffff;
  text-align: left;
}
.intro {    
    background-color: #f1f1f1;
    border-color: #969696;
    border-left: 5px solid #969696;
    padding: 0.5em;
}
.introE {    
    background-color: #f1f1f1;
    border-color: #969696;
    border-left: 5px solid #969696;
    padding: 0.5em;
    color : #117996;
}
.rq {    
    background-color: #fcf2f2;
    border-color: #dFb5b4;
    border-left: 5px solid #dfb5b4;
    padding: 0.5em;
}
.rqE {    
    background-color: #fcf2f2;
    border-color: #dFb5b4;
    border-left: 5px solid #dfb5b4;
    padding: 0.5em;
    color : #117996;
}
.exold {    
    background-color: #b2dbea80;
    border-color: #0055ff;
    border-left: 10px solid #0055ff;
    padding: 0.5em;
}
.ex {    
    background-color: #b2dbea80;
    padding: 0.5em;
    padding-top: 0em;
    position:relative;
}
.ex::before {
    background-color: #b2dbea;
    content:"Exercice";
    margin-left:-0.5em;
    margin-right:-0.5em;
    padding-left:0.5em;
    padding-right:0.5em;
    font-weight: 600;
    display: block;
}
.exE {    
    background-color: #b2dbea80;
    padding: 0.5em;
    padding-top: 0em;
    position:relative;
    color : #117996;
}
.exE::before {
    background-color: #b2dbea;
    content:"Exercise";
    margin-left:-0.5em;
    margin-right:-0.5em;
    padding-left:0.5em;
    padding-right:0.5em;
    font-weight: 600;
    display: block;
    color : #117996;
}
.app {    
    background-color: #b2dbea80;
    padding: 0.5em;
    padding-top: 0em;
    position:relative;
}
.app::before {
    background-color: #b2dbea;
    content:"Application";
    margin-left:-0.5em;
    margin-right:-0.5em;
    padding-left:0.5em;
    padding-right:0.5em;
    font-weight: 600;
    display: block;
}
.appE {    
    background-color: #b2dbea80;
    padding: 0.5em;
    padding-top: 0em;
    color : #117996;
    position:relative;
}
.appE::before {
    background-color: #b2dbea;
    content:"Application";
    margin-left:-0.5em;
    margin-right:-0.5em;
    padding-left:0.5em;
    padding-right:0.5em;
    font-weight: 600;
    color : #117996;
    display: block;
}
.sol {    
    background-color: #bbeab880;
    padding: 0.5em;
    padding-top: 0em;
    position:relative;
}
.sol::before {
    background-color: #bbeab8;
    content:"Answer";
    margin-left:-0.5em;
    margin-right:-0.5em;
    padding-left:0.5em;
    padding-right:0.5em;
    font-weight: 600;
    display: block;
}
</style>
