/* Global Styles */

body {
  font-family: Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  margin: 0;
  padding: 0;
}

h1, h2, h3 {
  margin-top: 0;
}

header {
  background-color: #333;
  color: #fff;
  padding: 20px;
}

main {
  padding: 20px;
}

section {
  margin-bottom: 20px;
}

footer {
  background-color: #333;
  color: #fff;
  padding: 20px;
}

/* Specific Styles */

h1 {
  font-size: 2rem;
  text-align: center;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

section {
  background-color: #f7f7f7;
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 20px;
}

p {
  margin-bottom: 0;
}

@media screen and (min-width: 768px) {
  main {
    display: flex;
    flex-wrap: wrap;
  }

  section {
    flex: 1 1 300px;
    margin-right: 20px;
  }

  section:last-child {
    margin-right: 0;
  }
}