jitsi_app_c0/css/modals/mute/_mute-dialog.scss

.mute-dialog {
	.separator-line {
        margin: 24px 0 24px -20px;
        padding: 0 20px;
        width: 100%;
        height: 1px;
        background: #5E6D7A;
    }

	.control-row {
        display: flex;
        justify-content: space-between;
        margin-top: 15px;

        label {
            font-size: 14px;
        }
    }
}