body {
  --light: #e6f03a;
  --light: #eee;
  --dark: #161616;
  margin: 0;
  overflow-x: hidden;
}

.backBtn {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 9;
  width: 25px;
  background-color: rgb(255, 255, 255);
  border-radius: 100%;
  padding: 5px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
  transition: background-color 0.2s;
}

.backBtn:hover {
  background-color: rgb(240, 240, 240);
}

section {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--light);
}

span {
  position: absolute;
  display: block;
  text-align: center;
  font-size: 50px;
  z-index: 2;
  width: 50%;
  text-transform: uppercase;
  font-weight: 900;
  color: var(--light);
  top: calc(50vh - 56px);

  &.up {
    right: 0;
  }

  &.down {
    left: 0;
  }
}

.box {
  height: 1.2vh;
  width: 50vw;
  margin-bottom: -0.2vh;
  background: var(--dark);
  display: block;
}

@media (max-width: 1199px) {
  span {
    font-size: 35px;
  }
}

@media (max-width: 767px) {
  span {
    font-size: 25px;
  }
}