body {
      margin: 0;
      padding: 0;
      font-family: 'Poppins', sans-serif;
      background: linear-gradient(135deg, #2c3e50, #3498db);
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      color: white;
    }

    .login-container {
      background-color: rgba(0, 0, 0, 0.2);
      padding: 2rem 3rem;
      border-radius: 12px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
      animation: fadeIn 1s ease;
      text-align: center;
    }

    h2 {
      margin-bottom: 1rem;
    }

    input {
      width: 100%;
      padding: 0.8rem;
      margin: 0.5rem 0;
      border: none;
      border-radius: 8px;
      font-size: 1rem;
    }

    button {
      width: 100%;
      padding: 0.8rem;
      background-color: #ff8c00;
      color: white;
      border: none;
      border-radius: 8px;
      font-size: 1rem;
      cursor: pointer;
      font-weight: bold;
      margin-top: 1rem;
      transition: background 0.3s;
    }

    button:hover {
      background-color: #ffa733;
    }

    .error {
      margin-top: 1rem;
      background: #e74c3c;
      padding: 0.6rem;
      border-radius: 6px;
    }

    @keyframes fadeIn {
      from {
        transform: translateY(30px);
        opacity: 0;
      }
      to {
        transform: translateY(0);
        opacity: 1;
      }
    }