* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background: #ffffff;
  color: #000000;
  line-height: 1.6;
}

header {
  background: #000;
  color: #fff;
  padding: 2rem;
  text-align: center;
}

nav {
  background: #111;
  display: flex;
  justify-content: center;
  padding: 1rem;
}

nav a {
  color: #fff;
  margin: 0 1rem;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

#hero {
  background: #f5f5f5;
  padding: 3rem;
  text-align: center;
}

section {
  padding: 2rem;
  max-width: 800px;
  margin: auto;
}

ul {
  list-style-type: square;
  padding-left: 2rem;
}

.btn {
  display: inline-block;
  background: #000;
  color: #fff;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  margin-top: 1rem;
}

.btn:hover {
  background: #333;
}

footer {
  background: #000;
  color: #fff;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}