body {
  font-family: 'Segoe UI', sans-serif;
  background: #f9fafb;
  padding: 2rem;
}
.container {
  max-width: 500px;
  margin: auto;
  background: white;
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
h1 {
  text-align: center;
  font-size: 2rem;
  color: #111827;
}
p {
  text-align: center;
  margin-bottom: 2rem;
  color: #4b5563;
}
label {
  margin-top: 1rem;
  display: block;
  color: #374151;
}
input, select, button {
  width: 100%;
  padding: 0.75rem;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  font-size: 1rem;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
}
button {
  background: #4f46e5;
  color: white;
  font-weight: bold;
  border: none;
  cursor: pointer;
}
.result {
  font-weight: bold;
  color: #111827;
  font-size: 1.2rem;
  text-align: center;
  margin-top: 1rem;
}