body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9ff;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: #786fff;
  padding: 2rem 1rem;
  text-align: center;
  color: white;
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

header .subtitle {
  margin-top: 0.5rem;
  font-size: 1rem;
}

main {
  flex-grow: 1;
  padding: 1rem;
  max-width: 640px;
  margin: auto;
}

h2 {
  margin-top: 0;
  color: #5246db;
}

.field-group {
  margin-bottom: 1rem;
}

.field-group label {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: bold;
}

.field-group input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}

button {
  background: #5246db;
  color: white;
  padding: 0.75rem 1.25rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  width: 100%;
}

button:hover {
  background: #4136c4;
}

.hidden {
  display: none;
}

.message {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 4px;
}

.message.success {
  background: #e0f7e9;
  color: #2e7d32;
}

.message.warning {
  background: #fff4e5;
  color: #e65100;
}