.otp-login-container, .otp-config-container {
        max-width: 400px;
        margin: 50px auto;
        padding: 20px;
        border: 1px solid #ccc;
        border-radius: 5px;
        background-color: #f9f9f9;
        font-family: Arial, sans-serif;
    }
    .otp-login-container h2, .otp-config-container h2 {
        text-align: center;
        color: #333;
    }
    .otp-login-container label, .otp-config-container label {
        display: block;
        margin: 10px 0 5px;
        color: #555;
    }
    .otp-login-container input, .otp-login-container select, .otp-config-container input, .otp-config-container select {
        width: 100%;
        padding: 8px;
        margin-bottom: 10px;
        border: 1px solid #ddd;
        border-radius: 4px;
    }
    .otp-login-container button, .otp-config-container button {
        width: 100%;
        padding: 10px;
        background-color: #0073aa;
        color: #fff;
        border: none;
        border-radius: 4px;
        cursor: pointer;
    }
    .otp-login-container button:hover, .otp-config-container button:hover {
        background-color: #005177;
    }
    .otp-message {
        margin: 10px 0;
        padding: 10px;
        border-radius: 4px;
    }
    .otp-message.success {
        background-color: #dff0d8;
        color: #3c763d;
    }
    .otp-message.error {
        background-color: #f2dede;
        color: #a94442;
    }