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

header {
    display: flex; /* put things side by side */
    background-color: grey; /* fill */
    height: 2rem; /* 1rem = 16px */
    line-height: 2rem; /* line of test = height = vertically centered text */
    color: white; /* text color */
    border-bottom: 4px solid black; /* width + type + color */
}

h1 {
    font-family: "DM Serif Display", serif;
  font-weight: 400;
  font-style: normal;
  font-size: 2rem;
  margin: 1rem;
  line-height: 1.2;
}

header p {
    font-family: "DM Serif Display", serif;
  font-weight: 400;
  font-style: normal;
  font-size: 1.2rem;
  margin-left: 1rem;
}