* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: Arial, sans-serif;
            background-color: #f5f5f5;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #333;
        }

        .login-container {
            background-color: white;
            width: 100%;
            max-width: 400px;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            border: 1px solid #ddd;
        }

        .header {
            text-align: center;
            margin-bottom: 30px;
        }

        .header h1 {
            color: #2c3e50;
            font-size: 24px;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .header p {
            color: #7f8c8d;
            font-size: 14px;
            margin-bottom: 20px;
        }

        .login-info {
            background-color: #ecf0f1;
            padding: 15px;
            border-radius: 5px;
            margin-bottom: 25px;
            border-left: 4px solid #3498db;
        }

        .login-info h4 {
            color: #2c3e50;
            margin-bottom: 10px;
            font-size: 14px;
            font-weight: 600;
        }

        .login-info p {
            font-size: 12px;
            margin-bottom: 5px;
            color: #7f8c8d;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            margin-bottom: 5px;
            color: #2c3e50;
            font-weight: 500;
        }

        .form-group input {
            width: 100%;
            padding: 12px;
            border: 1px solid #bdc3c7;
            border-radius: 5px;
            font-size: 14px;
            background-color: #fff;
            transition: border-color 0.3s;
        }

        .form-group input:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
        }

        .btn-login {
            width: 100%;
            padding: 12px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
            transition: background-color 0.3s;
            font-weight: 500;
        }

        .btn-login:hover {
            background-color: #2980b9;
        }

        .btn-login:active {
            background-color: #21618c;
        }

        .message {
            padding: 12px;
            margin-bottom: 20px;
            border-radius: 5px;
            text-align: center;
            font-size: 14px;
        }

        .message.error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }

        .help-text {
            font-size: 12px;
            color: #7f8c8d;
            margin-top: 20px;
            text-align: center;
        }

        .help-text a {
            color: #3498db;
            text-decoration: none;
        }

        .help-text a:hover {
            text-decoration: underline;
        }

        .voltar {
            margin-top: 20px;
            text-align: center;
        }

        .voltar a {
            color: #7f8c8d;
            text-decoration: none;
            font-size: 14px;
        }

        .voltar a:hover {
            text-decoration: underline;
            color: #2c3e50;
        }

        /* Pop-up personalizado */
        .popup-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 10000;
        }

        .popup {
            background-color: white;
            border-radius: 10px;
            padding: 30px;
            max-width: 400px;
            width: 90%;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            animation: popupSlideIn 0.3s ease-out;
        }

        @keyframes popupSlideIn {
            from {
                opacity: 0;
                transform: scale(0.8) translateY(-20px);
            }
            to {
                opacity: 1;
                transform: scale(1) translateY(0);
            }
        }

        .popup-icon {
            font-size: 50px;
            margin-bottom: 20px;
            color: #e74c3c;
        }

        .popup-title {
            font-size: 20px;
            font-weight: bold;
            color: #2c3e50;
            margin-bottom: 15px;
        }

        .popup-message {
            font-size: 16px;
            color: #7f8c8d;
            margin-bottom: 25px;
            line-height: 1.4;
        }

        .popup-button {
            padding: 12px 25px;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            background-color: #3498db;
            color: white;
        }

        .popup-button:hover {
            background-color: #2980b9;
        }

        @media (max-width: 768px) {
            .login-container {
                margin: 20px;
                padding: 30px 20px;
            }
        }