.description{
    width: 100%;
    height: 700px;
    border: solid rgb(72, 209, 204);
}
.contenu{
    display: grid;
    grid-template-columns: 50% 50%;
    grid-column-gap: 10%;
    margin-left: 10%;
}
.start{
    display: flex;
    justify-content: flex-start;
    flex-direction: column;
    width: 110%;
    margin-top: 0px;
    padding: none;
    margin-bottom: 10px;
}
.end{
    display: flex;
    justify-content: flex-start;
    flex-direction: column;
    width: 80%;
}
.button_nav{
    width: 10%;
	font-size: x-large;
	background-color: rgba(51, 141, 243, 0.527);
	border-radius: 50%;
}
.center{
    display: flex;
	justify-content: center;
}
.tri{
	grid-column: 1/3;
    display: flex;
    margin-bottom: 100px;
    padding-bottom: 100px;
}