#nasa-breadcrumb-site {
  background-size: cover;
  /*margin: 84px 0 0 0;*/
}
<style>
.nasa-breadcrumb {
  background-image: initial;
  background-color: var(--darkreader-background-f7f7f7, #1e2122);
}
.nasa-breadcrumb {
  background: #f7f7f7;
  display: block;
  position: relative;
  margin: 0;
  padding: 0px;
}
.breadcrumb-row {
  width: 100%;
  padding-top: 10px;
  padding-bottom: 10px;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex
;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.nasa-first-breadcrumb {
  color: inherit;
}
.nasa-first-breadcrumb {
  display: block;
  float: none;
  font-size: 175%;
  font-weight: 800;
  line-height: 1.4;
  color: inherit;
  margin: 0;
}
.breadcrumb {
  font-weight: normal;
  letter-spacing: 0;
  padding: 0px;
  margin: 0;
  font-size: 100%;
  line-height: 1.6;
  color: inherit;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.breadcrumb a {
  color: inherit;
}