body {
  font-family: system-ui, sans-serif;
  color: #1a1a1a;
  background: #f5f5f5;
  min-height: 100vh;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  box-sizing: border-box;
}

.card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 2rem;
  width: 100%;
  max-width: 360px;
}

h1 {
  margin: 0 0 0.25rem;
  font-size: 1.4rem;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: #666;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

input {
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}

button {
  margin-top: 1rem;
  padding: 0.7rem;
  border: none;
  border-radius: 6px;
  background: #2563eb;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
}

#login-error {
  color: #b91c1c;
  min-height: 1.2em;
  margin: 0.5rem 0 0;
}