body {
            background-color: #2f3138;
            color: #ffffff;
            height: 100vh;
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .panel {
            background-color: #444950;
            width: 100%;
            max-width: 400px;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
        }

        .panel-header {
            font-size: 24px;
            font-weight: bold;
            text-align: center;
            margin-bottom: 20px;
            color: #ffffff;
            text-transform: uppercase;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-control {
            background-color: #2f3138;
            color: #ffffff;
            border-color: #555;
        }

        /* Стили для кнопок Bootstrap 5 */
        .btn-primary {
            background-color: #0d6efd;
            border-color: #0d6efd;
        }

        .btn-primary:hover {
            background-color: #0b5ed7;
            border-color: #0b5ed7;
        }

        .btn-danger {
            background-color: #dc3545;
            border-color: #dc3545;
        }

        .btn-danger:hover {
            background-color: #c82333;
            border-color: #bd2130;
        }

        a {
            color: #0d6efd;
            text-decoration: none;
        }

        a:hover {
            text-decoration: underline;
        }