body {
  font-family: "Helvetica", "Arial", sans-serif;
  margin: 0 auto;
  max-width: 700px;
  min-width: 0;
  padding: 0 10px 25px;

  color: #444;

  display: grid;
  row-gap: 5px;
  grid-template-columns: auto auto;
  grid-template-rows: 60px auto;
  grid-template-areas:
    "header nav"
    "ct ct"
}

header {
  margin: 0;
  font-size: 23px;

  grid-area: header;
  justify-self: left;
  align-self: end;
}

nav {
  font-size: 18px;

  grid-area: nav;
  justify-self: right;
  align-self: end;
}

nav a {
  margin-left: 20px;
  text-align: right;
}

article {
  font-size: 16px;

  grid-area: ct;
  border-top: 2px solid gray;
}

a {
  color: #ffa64d;
}

h1, h2, strong {
  color: #222;
}

h1 {
  font-size: 26px;
}
h2 {
  font-size: 23px;
}

@media screen and (max-width: 430px) {
  body {
    grid-template-columns: auto;
    grid-template-rows: minmax(40px,auto) minmax(30px,auto) auto;
    grid-template-areas:
    "header"
    "nav"
    "ct"
  }

  header, nav {
    justify-self: center;
    text-align: center;
  }
  nav a {
    margin: 0 10px;
  }
}