header h1::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 250px;
  background-image: url("https://nubis.univ-paris1.fr/files/asset/fae577d5ce6f7c2185c02f6995a071314be4c044.webp");
  background-repeat: no-repeat;
  background-size: cover;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 0;
  opacity: 1;
}
h1 {
	text-align: center;
	font-size: 36px;
	margin-bottom: 24px;
	line-height: 40px;
	font-weight: bolder;
}
#content .blocks > h2:first-of-type {
	font-weight: bolder;
}
header nav li {
	display: block;
	margin: 0 .5em;
	flex-basis: -moz-available;
	max-width: 100px;
}
header h1 {
padding-top: 250px;
}
.right, .left {
    overflow: hidden;
    max-width: 45%;
}
.item-showcase {
	border-top: none;
	border-bottom: none;
}
h2 {
	text-align: center;
}
.collections, .page_site {display:none;}
.item-showcase .resource.item:not(:only-child) {
	width: 33%;
	clear: none;
	padding: 0.5rem;
}
.item-showcase .resource.item:not(:only-child) img {
	max-height: 30rem;
}
.site-title {
        width: 800px;
	font-size: 31px;
	letter-spacing: .140em;
	margin: 48px auto;
	text-align: center;
}

/* Page Precher */
.site-page-precher .blocks .right .media-render a {
    width: 485px;
    max-height: 485px;
}
.site-page-precher .blocks .right .media-render img {
  width: 100%;
} 
.site-page-conserver .blocks .square {
width: 250px;
}
.site-page-conserver .blocks .square .item.resource img {
width: 100%;
}
.collapse + .collapsible {
  display: block;
  margin: 15px 0;
  width: 100%;
}
.collapsible {
  display: none;
}
footer {
display: flex;
gap: 3rem;
align-items: center;
justify-content: space-evenly;
flex-wrap: wrap;
}
footer img {
max-width: 220px;
}
@media screen {
  a {
    color: #c72e2e;
    text-decoration: none;
  }
.nav-item {
    text-align: center;
  }
.nav-item > a {
    padding: 6px 2px;
  }
}
.blocks::after {
  content: '';
  display: block;
  clear: both;
}
aside.column.align-left {
  position: sticky;
  top: 0;
  font-size: .8rem;
  padding-right: 1rem;
  padding-top: .5rem;
  margin-right: 1rem;
  background-color: #f6f5f4;
}
.toc-block > ul > li {
  margin-bottom: .5rem;
  margin-left: .5rem;
}