.cours {
    background-color:red;
    border-radius:25px;
    padding:25px;
}

.nav-link {
    padding: 20px;
    color:red;
}

.div-hour{
    display:flex;
    flex-direction:column;width:30px;
    position:relative;
    margin:20px;
    margin-top:95px /*75 : 65 room height + 10 room padding + 20 room-div margin  */

}

.single-hour {
    position:absolute;
    transform: translateY(-50%);
}

.d-sel {
    padding:20px;
    font-size:30px
}

.room {
    z-index:5;
    position:sticky;
    top:110px;
    background:white;
    padding:5px;
    height:65px
}

.room-txt {
    font-size:20px;
    color : red;
}

.room-div {
    margin:20px;
    text-align:center;
}
a {
    text-decoration:none;
}

h1 {
    color:white;
}

p {
    color:white;
    font-size:14;
}