body {
  margin: 0;
  background: radial-gradient(circle at center, #0a0e1a 0%, #1a2a44 30%, #2e4060 70%, #4a6b9a 100%);
  font-family: sans-serif;
  color: #ddd;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.login-box {
  background: #1c1c1c;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.8);
  text-align: center;
  width: 320px;
}

.logo {
  margin-bottom: 1rem;
}

.logo img {
  width: 64px;
}

h2 {
  color: #a5c8ff;
  margin-bottom: 1.5rem;
}

input {
  width: 100%;
  padding: 0.6rem;
  margin-bottom: 1rem;
  border-radius: 6px;
  border: none;
  background: #3a3f4b;
  color: #fff;
  font-size: 1rem;
  box-sizing: border-box;
}

button {
  width: 100%;
  padding: 0.6rem;
  border-radius: 6px;
  border: none;
  background: #a5c8ff;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  box-sizing: border-box;
}

.error {
  color: #ff7373;
  margin-top: 0.5rem;
  display: none;
}