* {
  margin: 0px;
  padding: 0px;
  box-sizing: border-box;
}
body {
  font-family: "Poppins", sans-serif;
  overflow: hidden;
}
button {
  font-family: "Poppins", sans-serif;
  outline: none;
}

/** HEADER **/
header {
  display: flex;
  width: 80%;
  height: 10vh;
  margin: auto;
  align-items: center;
}
.logo-container {
  display: flex;
  height: 200%;
  flex: 1;
}

/* BACKGROUND */
.back_0 {
  position: absolute;
  height: 50%;
  bottom: 70%;
  left: 80%;
  z-index: -1;
}
.back_1 {
  position: absolute;
  top: 80%;
  right: 40%;
  z-index: -1;
  opacity: 0.5;
  height: 60%;
}
.back_2 {
  position: absolute;
  top: 10%;
  right: 60%;
  z-index: -1;
  opacity: 0.4;
}
.back_3 {
  position: absolute;
  height: 40%;
  top: 65%;
  right: 8%;
  z-index: -1;
}
.back_4 {
  position: absolute;
  height: 60%;
  top: 0%;
  right: 25%;
  z-index: -1;
}