.hotCold a{
margin: 0.2em;
font-size: 1.2em;
}

nav.histo a{
width: 49%;
}

.see15days{
margin-right: 2%;
}

@media (max-width:900px) {
main section.w40, main article.w60{
    width: 100%;
    margin-bottom: 2em;
    padding: 0;
}

}