MediaWiki:Common.css

:root {
  --body-main:         #e2dbc8;
  --body-light:        #d8ccb4;
  --ooui-normal-border: #b8a282;
}

body {
  background: var(--body-main) url('resources/assets/bg.png') no-repeat center top fixed;
  background-size: cover;
}

#mw-head {
  position: relative;
  overflow: hidden;
}
#mw-head::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 250px;
  background: linear-gradient(
    to bottom,
    rgba(226,219,200,0.95) 0%,
    rgba(226,219,200,0) 100%
  );
  pointer-events: none;
  z-index: 1;
}
#mw-head .mw-head-logo,
#mw-head .vector-menu {
  position: relative;
  z-index: 2;
}