body {
  font-family: sans-serif;
  background: linear-gradient(to right, #93c5fd, #a5f3fc);
  color: #1f2937;
  margin: 0;
  padding: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background-color: #ffffffcc;
  padding: 2rem;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 100%;
}

input {
  padding: 0.5rem;
  font-size: 1rem;
  width: 70%;
  border: 1px solid #ccc;
  border-radius: 8px;
}

button {
  padding: 0.5rem 1rem;
  background-color: #3b82f6;
  color: white;
  border: none;
  border-radius: 8px;
  margin-left: 0.5rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

button:hover {
  background-color: #2563eb;
}

.hidden {
  display: none;
}

#error-message {
  color: #dc2626;
  margin-top: 1rem;
}