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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f4f4f4;
}

header {
  background-color: #2c3e50;
  color: #fff;
  padding: 1rem;
  text-align: center;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
  background-color: #fff;
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

section {
  padding: 1rem;
}

h1, h2 {
  margin-bottom: 1rem;
}

ul {
  list-style-type: none;
}

li {
  margin-bottom: 0.5rem;
}

a {
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 1rem;
  background-color: #ecf0f1;
  color: #7f8c8d;
  margin-top: 2rem;
}

/* Responsive design */
@media (max-width: 600px) {
  main {
    margin: 1rem;
    padding: 0.5rem;
  }
  
  header, section, footer {
    padding: 0.5rem;
  }
}