* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --scale-factor: calc(1vw + 1vh);
  --text: #e7e7e0;
  --transition: transform 0.75s cubic-bezier(0.075, 0.5, 0, 1);
  --scrollTop: 0;
}

body {
  background-color: #010101;
  font-family: Raleway, Arial, sans-serif;
  line-height: 1.55;
}

.header {
  position: relative;
}

.header::after {
  content: "";
  position: absolute;
  z-index: 3;
  width: 100%;
  height: calc(var(--scale-factor) * 10);
  background-image: url(../img/ground.png);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  bottom: calc(var(--scale-factor) * -4.5);
}

.layers {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  position: relative;
}

.layers__header {
  z-index: 1;
  transform: translate3d(0, calc(var(--scrollTop) / 2), 0);
  transition: var(--transition);
  will-change: transform;
  text-transform: uppercase;
  font-weight: 900;
  color: var(--text);
  text-shadow: 0 0 15px #9d822b;
}

.layers__title {
  font-size: calc(var(--scale-factor) * 2.5);
}

.layers__caption {
  font-size: calc(var(--scale-factor) / 1.175);
  letter-spacing: calc(var(--scale-factor) / 3.5);
  margin-top: calc(var(--scale-factor) * -0.75);
}

.layer {
  height: 100%;
  width: 100%;
  position: absolute;
  background-size: cover;
  background-position: center;
  will-change: transform;
  z-index: 2;
  transition: var(--transition);
}

.layers__base {
  transform: translate3d(0, calc(var(--scrollTop) / 1.6), 0);
  z-index: 0;
}

.layers__middle {
  transform: translate3d(0, calc(var(--scrollTop) / 2.5), 0);
}

.layers__front {
  transform: translate3d(0, calc(var(--scrollTop) / 5.7), 0);
}

/*SECTION*/
.main {
  --main-transform: translate3d(0, calc(var(--scrollTop) / -7.5), 0);
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
}

.main__title {
  text-transform: uppercase;
  font-size: calc(var(--scale-factor) * 1.8);
  letter-spacing: calc(var(--scale-factor) / 7);
  transform: var(--main-transform);
  transition: var(--transition);
  will-change: transform;
}

.main__text {
  max-width: calc(var(--scale-factor) * 30);
  font-size: calc(var(--scale-factor) * 0.9);
  margin-top: calc(var(--scale-factor) / 1.25);
  transform: var(--main-transform);
  transition: var(--transition);
  will-change: transform;
}

.content {
  will-change: transform;
}

.copy {
  display: block;
  position: absolute;
  color: var(--text);
  font-size: calc(var(--scale-factor) * 0.8);
  letter-spacing: calc(var(--scale-factor) / 37.5);
  cursor: pointer;
  text-decoration: none;
  bottom: calc(var(--scale-factor) * 2.5);
}

.copy:hover {
  opacity: 0.5;
}