body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f7f7f7;
}

header {
  background-color: #263238;
  color: white;
  padding: 1rem;
  text-align: center;
}

header a {
  color: #90caf9;
  text-decoration: none;
  display: block;
  margin-top: 0.5rem;
}

main {
  max-width: 500px;
  margin: 2rem auto;
  background: white;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

label {
  margin-top: 1rem;
  font-weight: bold;
}

input[type="text"],
input[type="file"] {
  padding: 0.5rem;
  margin-top: 0.3rem;
}

button {
  margin-top: 1.5rem;
  padding: 0.75rem;
  background-color: #1976d2;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #1565c0;
}

.preview-area {
  margin-top: 2rem;
  text-align: center;
}

.preview-area img {
  max-width: 100%;
  border-radius: 10px;
}