body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #eef2ff, #f8fafc);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  width: 100%;
  max-width: 400px;
  padding: 1rem;
}

.card {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  text-align: center;
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #ddd;
  margin-bottom: 10px;
}

button {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: #2563eb;
  color: white;
  font-weight: 600;
  cursor: pointer;
}

.result-card {
  margin-top: 15px;
  padding: 1rem;
  border-radius: 10px;
  display: none;
}

.success {
  background: #ecfdf5;
  border: 1px solid #10b981;
}

.error {
  background: #fef2f2;
  border: 1px solid #ef4444;
}