selector {
property: value;
}
element: Selects all elements of a specific type#id: Selects an element with a specific ID.class: Selects all elements with a specific classelement, element: Selects multiple elementselement > element: Selects a direct child elementelement + element: Selects the next sibling elementelement ~ element: Selects all sibling elementscolor: Sets the color of textbackground-color: Sets the background color of an elementfont-family: Sets the font family of textfont-size: Sets the font size of textfont-weight: Sets the weight (boldness) of texttext-align: Sets the horizontal alignment of texttext-decoration: Sets the decoration of text (underline, etc.)padding: Sets the padding of an elementmargin: Sets the margin of an elementborder: Sets the border of an elementwidth: Sets the width of an elementheight: Sets the height of an elementdisplay: Sets the display style of an elementposition: Sets the position of an elementz-index: Sets the stacking order of elementspx: Pixels%: Percentagesem: Relative to the font size of the elementrem: Relative to the font size of the root elementvh: Relative to the height of the viewportvw: Relative to the width of the viewport