body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle, #0f0f3d 0%, #02021a 100%);
  font-family: Arial, sans-serif;
  color: white;
  padding: 16px;
  box-sizing: border-box;
}

.login-box {
  width: 100%;
  max-width: 420px;
  background: rgba(10, 17, 69, 0.9);
  border: 2px solid #00e5ff;
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 0 25px rgba(0, 229, 255, 0.35);
  text-align: center;
  box-sizing: border-box;
}

h2 {
  margin-bottom: 20px;
  color: #ffcc00;
}

input {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: none;
  margin-bottom: 15px;
  font-size: 1rem;
  box-sizing: border-box;
}

button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: #ffcc00;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  font-size: 1rem;
}

.error {
  color: #ff6b6b;
  margin-bottom: 12px;
  font-weight: bold;
}

a {
  color: #00e5ff;
  text-decoration: none;
  display: inline-block;
  margin-top: 15px;
}

/* Responsive celular */
@media (max-width: 480px) {
  body {
    align-items: flex-start;
    padding: 24px 12px;
  }

  .login-box {
    max-width: 100%;
    padding: 22px 16px;
    border-radius: 16px;
  }

  h2 {
    font-size: 1.35rem;
  }

  input,
  button {
    font-size: 1rem;
    padding: 13px;
  }
}