* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: #222222;
  background: #f4f4f4;
}

header {
  padding: 20px;
  text-align: center;
  color: #ffffff;
  background: #333333;
}

header h1 {
  margin: 0 0 10px;
}

nav a {
  margin: 0 10px;
  color: #ffffff;
  text-decoration: none;
}

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

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}

section {
  margin-bottom: 20px;
  padding: 30px;
  background: #ffffff;
  border-radius: 8px;
}

.hero {
  text-align: center;
}

.button {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 16px;
  color: #ffffff;
  background: #333333;
  border-radius: 4px;
  text-decoration: none;
}

.button:hover {
  background: #555555;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
}

article {
  padding: 20px;
  background: #f9f9f9;
  border: 1px solid #dddddd;
  border-radius: 6px;
}

footer {
  padding: 20px;
  text-align: center;
  color: #ffffff;
  background: #333333;
}

footer p {
  margin: 0;
}