$c: #F00;
$f: 4000px;
$s: 30;
$r1: 0.7;
$r2: 0.98;
$st: 4px;

body {
  margin: 0;
  overflow: hidden;
  background: #fff;
  height: 100vh;
  transform: scale(0.025);
  transform-origin: 50% 100%;
}

section {
  font-size: $f;
  $w: 8em/$s;
  $h: 1em;
  height: $h;
  width: $w;
  position: absolute;
  left: 50%;
  bottom: 0;
  margin-left: $w/-2;
  background: mix($c,black,10%);
  box-shadow: 
    $st 0 0 0 mix($c,black,40%),
    $st*-1 0 0 0 mix($c,black,40%);

}

div {
  font-size: 1em*$r1;
  position: absolute;
  bottom: calc(100% - 0.1em);
  width: 100%*$r1;
  background: inherit;
  box-shadow: inherit;

  
  &:nth-child(1) {
    left: 0;
    transform-origin: 0 100%;
    transform: rotate(-35deg);
    &._1 {
      height: 100%*$r1;
    }
    &._0 {
      height: 100%*$r2;
    }
  }
  &:nth-child(2) {
    right: 0;
    transform-origin: 100% 100%;
    transform: rotate(25deg);
    &._1 {
      height: 100%*$r2;
    }
    &._0 {
      height: 100%*$r1;
    }
  }
}