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

html, body {
  height: 100%;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  font-size: 18px;
  background-color: #f4f4f4;
  color: #333;
  padding: 20px;
  text-align: center;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

section {
  margin: 20px 0;
}

header {
  background: #333;
  color: #fff;
  padding: 10px 0;
  text-align: center;
}

main {
  margin: 20px 0;
}