Different ways of creating CSS rules

.css_class_name

{

..

}

.css_class_name *

{

..

}

.css_class_name html_tag_name

{

..

}

.css_class_name html_tag_name1, html_tag_name2

{

..

}

.css_class_name .its_child_class_name

{

..

}

.css_class_name table > tbody > tr > td

{

..

}

.css_class_name table > tbody > tr > td:first-child

{

..

}

#id_of_html_element

{

..

}

.css_class_name [id= id_of_html_element]

{

..

}

.css_class_name input[type=text]

{

..

}