body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #282A35; 
            color: #f8f8f8; 
            text-align: right; 
            direction: rtl; 
            line-height: 1.6;
        }

        .login-page {
            display: flex; 
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            width: 100%;
        }

        .login-container {
            background-color: #333;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
            width: 100%;
            max-width: 450px;
            text-align: center;
        }

        .login-container h1 {
            color: #04AA6D;
            margin-bottom: 30px;
            font-size: 2.2em;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            color: #e6e6e6;
        }

        .form-group input,
        .form-group select {
            width: calc(100% - 20px); 
            padding: 12px;
            border: 1px solid #555;
            border-radius: 6px;
            background-color: #444;
            color: #f8f8f8;
            font-size: 1em;
            outline: none;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group select:focus {
            border-color: #04AA6D;
        }

        .login-button {
            width: 100%;
            padding: 15px;
            background-color: #04AA6D;
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 1.1em;
            font-weight: bold;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.2s ease;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }

        .login-button:hover {
            background-color: #058f5e;
            transform: translateY(-2px);
        }

        .language-guide-page {
            display: none; 
            max-width: 1000px; 
            margin: 20px auto; 
            padding: 20px 30px;
            background-color: #333; 
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.6); 
            border-radius: 10px; 
            min-height: calc(100vh - 40px); 
        }

        .language-guide-page h1 {
            color: #04AA6D; 
            font-size: 2.8em;
            text-align: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid #555; 
        }

        .main-nav {
            position: sticky; 
            top: 0; 
            z-index: 999; 
            background-color: #282A35; 
            padding: 10px 0;
            display: flex; 
            justify-content: center; 
            margin-bottom: 30px;
            flex-wrap: wrap; 
            gap: 10px; 
            border-radius: 0 0 10px 10px; 
            box-shadow: 0 5px 15px rgba(0,0,0,0.4); 
        }

        .main-nav a {
            background-color: #04AA6D; 
            color: white;
            padding: 12px 20px;
            text-decoration: none;
            border-radius: 8px; 
            transition: background-color 0.3s ease, transform 0.2s ease;
            font-weight: bold;
            font-size: 1.1em;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            white-space: nowrap; 
        }

        .main-nav a:hover {
            background-color: #058f5e; 
            transform: translateY(-2px); 
        }

        .language-section {
            margin-bottom: 70px; 
            padding-bottom: 40px;
            border-bottom: 1px dashed #555; 
        }

        .language-section:last-child {
            border-bottom: none; 
        }

        .language-section h2 {
            color: #04AA6D; 
            font-size: 2.2em;
            margin-bottom: 15px;
            padding-bottom: 5px;
            border-bottom: 2px solid #04AA6D; 
        }

        .language-section h3 {
            color: #EEE; 
            font-size: 1.5em;
            margin-top: 25px;
            margin-bottom: 10px;
        }


        .description {
            background-color: #3A3D4E; 
            border-right: 5px solid #2196F3; 
            margin-bottom: 25px;
            padding: 18px;
            font-style: italic;
            line-height: 1.6;
            border-radius: 6px;
            color: #d8d8d8; 
        }

        .code-example {
            background-color: #444; 
            border-right: 3px solid #04AA6D; 
            padding: 15px;
            margin-top: 10px;
            margin-bottom: 20px;
            overflow-x: auto; 
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.9em;
            line-height: 1.4;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.08); 
            color: #abdcff; 
        }

        .code-example pre {
            margin: 0;
            white-space: pre-wrap; 
        }

        .command-title {
            color: #04AA6D;
            font-weight: bold;
            font-size: 1.15em;
            margin-top: 25px;
            margin-bottom: 8px;
        }

        p {
            line-height: 1.6;
            color: #f8f8f8;
        }

        .custom-alert-box {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: #f44336; 
            color: white;
            padding: 15px 25px;
            border-radius: 8px;
            z-index: 1000;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
            text-align: center;
            direction: rtl;
            font-size: 1.1em;
        }

        .custom-alert-box button {
            background-color: #d32f2f; 
            color: white;
            border: none;
            padding: 8px 15px;
            margin-top: 15px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1em;
            transition: background-color 0.2s ease;
        }

        .custom-alert-box button:hover {
            background-color: #c62828;
        }

        @media (max-width: 768px) {
            .login-container, .language-guide-page {
                margin: 15px;
                padding: 15px;
            }

            .login-container h1, .language-guide-page h1 {
                font-size: 2.2em;
            }

            .main-nav {
                flex-direction: column; 
                align-items: center; 
                gap: 8px;
            }

            .main-nav a {
                width: 80%; 
                text-align: center;
            }

            .language-section h2 {
                font-size: 1.8em;
            }

            .language-section h3 {
                font-size: 1.2em;
            }

            .description, .code-example {
                padding: 12px;
            }
        }

        .footer {
            text-align: center;
            padding: 20px;
            margin-top: 40px;
            border-top: 1px solid #555; 
            color: #aaa;
            font-size: 0.9em;
        }