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

header {
  background-color: #333;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
}

main {
  padding: 20px;
  max-width: 600px;
  margin: auto;
  background: #fff;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

form {
  display: flex;
  flex-direction: column;
}

form label {
  margin: 10px 0;
}

button {
  padding: 10px;
  background-color: green;
  color: white;
  border: none;
  cursor: pointer;
}

footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 20px;
}

.error-message {
  color: red;
  font-weight: bold;
}

.profile-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 20px;
}