:root {
  color: #000000;
  background: #ffffff;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background: #ffffff;
  color: #000000;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: flex;
  flex-direction: column;
  width: min(90%, 720px);
  min-height: 100vh;
  margin: 0 auto;
}

.content {
  flex: 1;
}

.introduction {
  margin: 4rem 0;
  font-size: 1rem;
  line-height: 1.5;
}

nav {
  display: flex;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid #e5e5e5;
}

nav a {
  color: #000000;
  font-size: 0.875rem;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

footer {
  padding: 2rem 0;
  border-top: 1px solid #e5e5e5;
  color: #000000;
  font-size: 0.75rem;
  line-height: 1.5;
}