body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
  background-color: #f4f4f4;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: linear-gradient(
    135deg,
    #8b5a2b 25%,
    #cd853f 25%,
    #cd853f 50%,
    #8b5a2b 50%,
    #8b5a2b 75%,
    #cd853f 75%,
    #cd853f 100%
  );
  background-size: 40px 40px;
  color: white;
  padding: 20px 0;
}

main {
  margin: 20px;
  padding: 20px;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 5px;
}

footer {
  background-size: 40px 40px;
  color: white;
  background-image: url("background.png");
  background-size: cover;
  background-position: center;
  position: fixed;
  width: 100%;
  bottom: 0;
}