body {
  margin: 0;
}

header {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 28px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

header nav {
  display: flex;
  align-items: center;
}

header nav a,
header nav a:visited,
header nav a:active {
  color: #0f172a;
  text-decoration: none;
  font-weight: 500;
}

header nav a {
  margin-left: 20px;
}

header nav a:hover,
header nav a:focus {
  color: #0f172a;
  text-decoration: underline;
}

@media (max-width: 640px) {
  header {
    padding: 20px 18px;
  }
}