html, body {
    padding: 0;
    margin: 0;
    background-color: var(--background);
}

#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--background);
}

#background div {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 25%;
  background-position: center !important;
  background-size: cover !important;
  background-repeat: no-repeat !important;
}

#background div:nth-child(1) {
  left: 0;
}
#background div:nth-child(2) {
  left: 25%;
}
#background div:nth-child(3) {
  left: 50%;
}
#background div:nth-child(4) {
  left: 75%;
}

h1, h2, p, a, span, figure {
    margin: 0;
    padding: 0;
}

h1.seo {
    display: none !important;
  }
  
img.seo {
    display: none !important;
}
  
h3.seo {
    display: inline-block;
    margin: 0;
    padding: 0;
}

a {
  color: black;
}

a:hover {
  animation: stroboscope_home 200ms infinite;
}

@keyframes stroboscope_home {
  0% { color: blue; }
  25% { color: green; }
  50% { color: red; }
  75% { color: yellow; }
  100% { color: blue; }
}

@keyframes stroboscope_back {
  0% { filter: drop-shadow(0px var(--drop-shadow) 0px blue) }
  25% { filter: drop-shadow(0px var(--drop-shadow) 0px green) }
  50% { filter: drop-shadow(0px var(--drop-shadow) 0px red) }
  75% { filter: drop-shadow(0px var(--drop-shadow) 0px yellow) }
  100% { filter: drop-shadow(0px var(--drop-shadow) 0px blue) }
}

.menu .stroboscope:hover {
  animation: stroboscope_home 200ms infinite;
}
  
#back.stroboscope {
  animation: stroboscope_back 200ms infinite;
}

#back.stroboscope:hover {
  animation: none;
}