:root {
  font-size: 20px;
}

@media (min-width: 300px) and (max-width: 800px) {
  :root {
    font-size: calc( 20px + (20 - 20) * ( (100vw - 300px) / ( 800 - 300) ));
  }
}
@media (min-width: 800px) {
  :root {
    font-size: 20px;
  }
}
html {
  height: 100%;
  background: #c2c2c2;
  display: flex;
  align-items: center;
  justify-content: center;
}

body {
  margin: 0;
}

a.black:link {
  color: black;
  text-decoration: none;
}

a.black:visited {
  color: black;
}

a.black:hover {
  color: #666666;
  text-decoration: underline;
}

a.black:active {
  color: #c2c2c2;
  background: black;
}

.text {
  font-family: 'Oswald', serif;
  font-weight: light;
  text-align: center;
  line-height: 0.5;
  width: 300px;
  padding-top: 10px;
  display: table;
  /* or inline-block to vertical align */
  margin: auto;
  /* body flex-child takes width of content, not window */
}

.spinner {
  display: block;
  width: 40vh;
  height: 40vh;
  min-width: 300px;
  min-height: 300px;
  margin: auto;
  position: relative;
  -webkit-animation: spin 60s linear infinite;
          animation: spin 60s linear infinite;
  z-index: 1;
}

.static {
  display: block;
  width: 40vh;
  height: 40vh;
  min-width: 300px;
  min-height: 300px;
  margin: auto;
  position: absolute;
  z-index: 2;
}

.quadrant {
  position: absolute;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 100%;
  mix-blend-mode: multiply;
  /* &:nth-child(4) {
    // animation: slide_vert_pos 3.5s linear alternate infinite;
     &:after {
       mix-blend-mode: normal;
       //opacity: .5;
       background: #000000;
     }
   } */
}
.quadrant:after {
  content: "";
  color: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 100%;
}
.quadrant:nth-child(1) {
  -webkit-animation: slide_horiz_neg 12s linear alternate infinite;
          animation: slide_horiz_neg 12s linear alternate infinite;
}
.quadrant:nth-child(1):after {
  background: cyan;
}
.quadrant:nth-child(2) {
  -webkit-animation: slide_vert_neg 8s linear alternate infinite;
          animation: slide_vert_neg 8s linear alternate infinite;
}
.quadrant:nth-child(2):after {
  background: yellow;
}
.quadrant:nth-child(3) {
  -webkit-animation: slide_horiz_pos 10s linear alternate infinite;
          animation: slide_horiz_pos 10s linear alternate infinite;
}
.quadrant:nth-child(3):after {
  background: magenta;
}

.quadrant2 {
  position: absolute;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 100%;
  content: "";
  color: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 100%;
  background: black;
}

@-webkit-keyframes spin {
  to {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}

@keyframes spin {
  to {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}
@-webkit-keyframes slide_vert_pos {
  0% {
    -webkit-transform: translateY(0%);
            transform: translateY(0%);
  }
  100% {
    -webkit-transform: translateY(1%);
            transform: translateY(1%);
  }
}
@keyframes slide_vert_pos {
  0% {
    -webkit-transform: translateY(0%);
            transform: translateY(0%);
  }
  100% {
    -webkit-transform: translateY(1%);
            transform: translateY(1%);
  }
}
@-webkit-keyframes slide_vert_neg {
  0% {
    -webkit-transform: translateY(0%);
            transform: translateY(0%);
  }
  100% {
    -webkit-transform: translateY(-1%);
            transform: translateY(-1%);
  }
}
@keyframes slide_vert_neg {
  0% {
    -webkit-transform: translateY(0%);
            transform: translateY(0%);
  }
  100% {
    -webkit-transform: translateY(-1%);
            transform: translateY(-1%);
  }
}
@-webkit-keyframes slide_horiz_pos {
  0% {
    -webkit-transform: translateX(0%);
            transform: translateX(0%);
  }
  100% {
    -webkit-transform: translateX(1%);
            transform: translateX(1%);
  }
}
@keyframes slide_horiz_pos {
  0% {
    -webkit-transform: translateX(0%);
            transform: translateX(0%);
  }
  100% {
    -webkit-transform: translateX(1%);
            transform: translateX(1%);
  }
}
@-webkit-keyframes slide_horiz_neg {
  0% {
    -webkit-transform: translateX(0%);
            transform: translateX(0%);
  }
  100% {
    -webkit-transform: translateX(-1%);
            transform: translateX(-1%);
  }
}
@keyframes slide_horiz_neg {
  0% {
    -webkit-transform: translateX(0%);
            transform: translateX(0%);
  }
  100% {
    -webkit-transform: translateX(-1%);
            transform: translateX(-1%);
  }
}