body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: #f4f4f4;
}

header, footer {
  background-color: #2f4f4f;
  color: white;
  padding: 20px 0;
  text-align: center;
}

nav {
  background-color: #ddd;
  text-align: center;
  padding: 10px 0;
}

nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #2f4f4f;
}

nav a:hover {
  text-decoration: underline;
}

.container {
  width: 90%;
  max-width: 1000px;
  margin: auto;
  padding: 20px;
  background-color: white;
}

.success-message {
  color: green;
  font-weight: bold;
  margin-bottom: 10px;
}

.error-message {
  color: red;
  font-weight: bold;
  margin-bottom: 10px;
}

h1, h2 {
  color: #333;
}

.input-full {
  width: 100%;
  padding: 8px;
}

.submit-button {
  padding: 10px 20px;
}