.error404 .site-main .title-404{
  color:var(--th-color-secondary-lighter);
  font-size:12em;
  font-weight:900;
  line-height:0.8;
}

.error404 .site-main .search-form{
  display:-webkit-box;
  display:-ms-flexbox;
  display:flex;
}

.error404 .site-main .search-form label,
.error404 .site-main .search-form .search-field{
  width:100%;
}

.error404 .site-main .search-form .search-submit{
  margin-left:0.75rem;
}

@media (min-width: 768px){
  .site-main > .error-404{
    text-align:inherit;
  }
  .error404 .site-main .page-content{
    border-left:5px solid var(--th-color-secondary-lighter);
    margin-left:3rem;
    padding:2rem 0 2rem 3rem;
    width:100%;
  }
}