@font-face {
  font-family: "HK Grotesk";
  src: url(hk-grotesk.woff2), url(hk-grotesk.woff);
}

body {
	font-family: "HK Grotesk", Arial;
	font-size: 36px;
	line-height: 1.25;
	
	background-color: #ffffff;
	color: #333333;
}

header {
  position: fixed;
  top: 36px;
  left: 36px;
  z-index: 1;
  transition: color 0.5s;
}

header.white {
  color: white;
}

section {
  background-color: #c8dee0;
  min-height: 100vh;
  padding: 80px;
  
  display: flex;
  justify-content: center;
  align-items: center;
}

div.content {
  position: relative;
}

div.square {
  width: 100px;
  height: 100px;
  background-color: #d54156;
  
  position: absolute;
  top: 50px;
  left: -50px;
}

div.circle {
  width: 100px;
  height: 100px;
  background-color: #5982a0;
  
  position: absolute;
  bottom: 50px;
  right: -50px;
  
  border-radius: 50%;
}

div.content img {
  position: relative;
}

section.s2 {
	background-color: #c5c5c5;
}

section.s2 div.square {
  background-color: #d6ac35;
}

section.s2 div.circle {
  background-color: #be3c52;
}

section.s3 {
	background-color: #292121;
}

section.s3 div.square {
  background-color: #5f3736;
}

section.s3 div.circle {
  background-color: #6e5f67;
}

section.s4 {
	background-color: #f3f1f2;
}

section.s4 div.square {
  background-color: #d54156;
}

section.s4 div.circle {
  background-color: #5982a0;
}

div.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 10px;
  background-color: #ffb1b1;
  z-index: 1;
  transition: background-color 0.5s;
}

div.progress.white {
  background-color: white;
}