.centrer-verticalement{display:flex;flex-direction:column;justify-content:center;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;-webkit-box-orient:vertical;-webkit-box-direction:normal;-webkit-flex-direction:column;-moz-box-orient:vertical;-moz-box-direction:normal;-ms-flex-direction:column;-webkit-box-pack:center;-webkit-justify-content:center;-moz-box-pack:center;-ms-flex-pack:center}@media only screen and (max-width:980px){#logo{min-height:80px}}@media only screen and (min-width:981px){#logo{min-height:100px}}#top-menu li{vertical-align:text-top;text-align:center}#main-footer{display:none}.nav li{position:relative;line-height:1.4em}