body {
  font-family: "Inter", Arial, sans-serif;
  background: #f8fafc;
  color: #333;
  margin: 0;
  padding: 40px;
}

.container {
  max-width: 700px;
  margin: auto;
  background: #fff;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

label {
  font-weight: 600;
}

.preview {
  text-align: center;
  margin-top: 25px;
}

.preview img {
  border: 1px solid #ccc;
  border-radius: 6px;
  max-width: 100%;
}

.btn-primary {
  background-color: #0069d9;
  border: none;
}

.btn-primary:hover {
  background-color: #0053ba;
}

footer {
  margin-top: 30px;
  text-align: center;
  font-size: 0.9em;
  color: #777;
}