body{font-family: Arial, Helvetica, sans-serif; background-color: yellow;}

header {
display: flex;
background-color: white;
 height: 2rem; 
 line-height: 2rem;
  border-bottom: 4px solid black;
   font-size: 1.2rem;
  margin-left: 1rem;
}

header img {
  width: 4.5rem;
  height: 2rem;
}

h1 {
  font-family: "Climate Crisis", sans-serif;
  font-optical-sizing: auto;
  font-weight: 400;
  font-style: normal;
  font-variation-settings:
    "YEAR" 1979;
    font-size: 2rem;
    margin: 1rem;
    line-height: 1.2;
}

nav {margin-bottom: 4rem;}