:root {
  --main-dark-color: #382f2d;
  --main-light-color: #faf4f2;
}

header.positive-header {
  background-color: var(--main-dark-color);
  color: var(--main-light-color);
}

.mdl-layout__header-row {
  padding: 1rem;
}

.positive-content {
  display: flex;
  flex-direction: column;
}

.positive-content mdl-grid {
  width: 100%;
}

.positive-animation-area {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background-color: var(--main-light-color);
  overflow: hidden;
}

ul.plus-area {
  margin: 0;
  padding: 0;
  list-style: none;
}

ul.plus-area li {
  position: absolute;
  display: block;
  color: #ebe4e1;
  animation: animate 30s ease-in infinite;
  bottom: -150px;
}

ul.plus-area li:nth-child(1) {
  left: 0%;
  font-size: 15rem;
  animation-delay: 0s;
}

ul.plus-area li:nth-child(2) {
  left: 5%;
  font-size: 40rem;
  animation-delay: 5s;
}

ul.plus-area li:nth-child(3) {
  left: 20%;
  font-size: 20rem;
  animation-delay: 10s;
}

ul.plus-area li:nth-child(4) {
  left: 3%;
  font-size: 10rem;
  animation-delay: 15s;
}

ul.plus-area li:nth-child(5) {
  left: 30%;
  font-size: 15rem;
  animation-delay: 20s;
}

@keyframes animate {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-120vh);
  }
}