.cours-content p , .cours-content li {
    text-align: justify;
    font-size: 120%;
} 
.cours-content h1{
    margin-bottom: 3%;
}
.cours-content nav{
    justify-content: center;
}
.cours-content {
    margin: 2rem auto;
    max-width: 1000px;
    margin-bottom: 115px; 
}