body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  /* center everything */
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f4f4f4;
}

header {
  background-color: #333;
  color: #fff;
  padding: 1rem;
  text-align: center;
}

nav {
  background-color: #444;
  padding: 0.5rem;
}

nav a {
  color: #fff;
  text-decoration: none;
  padding: 0.5rem 1rem;
  display: inline-block;
}

nav a:hover {
  background-color: #555;
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  background-color: #fff;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

h1,
h2,
h3 {
  margin-bottom: 0.5rem;
  color: #333;
}

footer {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}
a {
    display: block;
}