body { text-align: center; } #alert { position: absolute; display: block; top: 0; width: 100vw; height: 60px; background-color: white; z-index: 1; padding: 15px; } a.link2 { text-decoration: none; color: #FFDC00; -webkit-text-stroke: 1px black; } a.link2:hover { color: black; -webkit-text-stroke: 1px black; } .iframe_amicale { position: absolute; overflow: hidden; width: 100vw; height: 100%; margin: 0; top: 60px; left: 0; } a.link_in_yellow_box { text-decoration: none; color: black; } a.link_in_yellow_box:hover { color: white; }