body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  background: white;
  padding: 2rem;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  max-width: 500px;
  width: 90%;
  text-align: center;
}

h1 {
  color: #333;
  margin-bottom: 2rem;
  font-size: 2em;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

input {
  padding: 15px;
  border: 2px solid #eee;
  border-radius: 10px;
  font-size: 16px;
  transition: border-color 0.3s;
}

input:focus {
  outline: none;
  border-color: #667eea;
}

button {
  padding: 15px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.2s;
}

button:hover {
  transform: translateY(-2px);
}

.error {
  background: #fee;
  color: #c33;
  padding: 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
}

.success {
  background: #efe;
  color: #3c3;
  padding: 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
  word-break: break-all;
}

.note {
  margin-top: 1.5rem;
  color: #666;
  font-size: 0.9em;
}