{box-sizing: border-box}
#texte button {
font-family: "Comic Sans Ms", verdana;
text-align:center;

}



/* Style the tab */
div.tab {
    float: left;
    background-color: rgb(163,201,25);    
    width: 250px;
    height: auto;
}

/* Style the buttons inside the tab */
div.tab button {
    display: block;
    background-color: lightblue;
    color: black;
    padding: 150px 25px;
    width: 250px;
    height:200px;
    border: none;
    outline: none;
    text-align: left;
    cursor: pointer;
    transition: 0.5s;
    font-size: 17px;
}

/* Change background color of buttons on hover */
div.tab button:hover {
    background-color: rgb(163,201,25);;
}

/* Create an active/current "tab button" class */
div.tab button.active {
    background-color: orange;
}

/* Style the tab content */
.tabcontent {
    float: right;
    
    padding: 0px 12px;
    position:absolute;
    width: 595px;
    border-left: none;
    height: 595px;
    left:475px;
    
}


.tabcontent h3 {
    text-align:center;
    font-size:22px;
    padding-bottom:40px;

   
}

#texte span {
    display:block;
    padding:5px 20px;
    font-family:Arial, verdana, sans-serif;
    font-size:17px;
}

#texte h3 {
    margin-bottom:-2px;
}


#Equ p {
    margin-top: 5px;
    font-size:18px;
    padding:5px;
}

#texte #pre h3 {
    margin-top:30px;
}