/* Universal Styles */
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f0f2f5;
            color: #333;
        }

        .container {
            padding: 15px;
        }

        /* Header */
        .main-header {
            background-color: #234680;
            color: white;
            padding: 10px 15px;
            border-bottom: 1px solid #ddd;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            font-weight: bold;
            font-size: 1.1em;
        }

        .logo-icon {
            width: 35px;
            height: 35px;
            margin-right: 5px;
        }

        .header-icons i {
            font-size: 1.2em;
            margin-left: 15px;
            color: #555;
        }

        /* Navigation Bar */
        .main-nav ul {
            list-style: none;
            display: flex;
            justify-content: space-around;
            padding: 10px 0;
            margin: 0;
            background-color: #fff;
            border-bottom: 1px solid #ddd;
        }

        .main-nav ul li {
            color: #1b3a5c;
            width: 65px;
            border: 2px solid #f9f9fa;
            border-radius: 4px;
            background-color: #f9f9fa;
        }

        .main-nav ul li:hover {
            cursor: pointer;
            color: #1b3a5c;
            background: #f1f5f9;
        }

        .main-nav li a {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none;
            color: #777;
            font-size: 0.8em;
            text-align: center;
        }

        .main-nav li a i {
            font-size: 1.2em;
            margin-bottom: 5px;
        }

        .main-nav li a.active {
            background-color: #eef2ff;
            color: #1b3a5c;
        }

        .back-button {
            background-color: #1b3a5c;
            color: #fff;
            text-decoration: none;
            padding: 12px 25px;
            border-radius: 25px;
            font-size: 1em;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        }
        .back-button:hover {
            background-color: #274b8f;
        }

        /* Fixed Telegram Button */
        .telegram-btn {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 60px;
            height: 60px;
            background-color: #0088cc;
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2em;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
            z-index: 1000;
            cursor: pointer;
            text-decoration: none;
        }