body {
  background: linear-gradient(135deg, #e3f2fd, #f8f9fa);
  min-height: 100dvh; /* new dynamic viewport unit */
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: #fff;
  border-radius: 1rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  transition: transform 0.2s ease-in-out;
}

.login-card:hover {
  transform: translateY(-4px);
}

.login-logo {
  display: block;
  margin: 0 auto 1rem;
  max-width: 280px;
}

.form-control {
  border-radius: 0.75rem;
  padding: 0.65rem 1rem;
}

.btn-primary {
  border-radius: 0.75rem;
  padding: 0.65rem;
  font-weight: 600;
  background: #007bff;
}

.btn-primary:hover {
  background: #0069d9;
}

.footer-text {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: #6c757d;
  text-align: center;
}

@media (max-width: 480px) {
  .login-card {
    padding: 1.5rem;
    margin: 1rem;
  }
  .login-logo {
    max-width: 220px;
  }
}