footer {
    background-color: #4caf50;
    color: white;
    text-align: center;
    padding: 1rem 0;
    bottom: 0;
    width: 100%;
    flex-shrink: 0;
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background-color: #4caf50;
  color: white;
  padding: 1rem 0;
  text-align: center;
}

main {
  margin: 2rem;
  flex-grow: 1;
}

h1,
h2,
h3 {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

section {
  margin-bottom: 2rem;
}