html * {box-sizing: border-box;}

body {
  font-family: system-ui, sans-serif;
  font-size: 100%;
  line-height: 1.35em; 
  margin: 0;
}

header {
  min-height: 50vh;
  background-color: #aaa;
  background-image: linear-gradient(#000,#000), url("images/foggy01.jpg");
  background-size: cover;
  background-position: center bottom;
}
h1 {
  margin: 0;
  padding-top: 8rem;
  text-align: center;
  font-size: 8vw;
  line-height: 1em;
  color: #fff;
}

section {
  padding: 1em;
  margin: 0;
  width: 100%;
  height: 33em;
  background-color: #bba;
}

section:first-child {
  background-color: #abb;
}
section:last-child {
  background-color: #bab;
}
section:nth-child(2) {
  background-image: url(images/foggy02.jpg);
  background-size: cover;
  background-position: center center;
}