Framgia HTML-CSS Coding Standard Indentation Same as in PHP, please use 4 spaces for indentation. DO NOT USE HARD Tab. Use lowercase for element names, attributes, attributes values (unless text/CDATA), CSS selectors, properties, property values. Remove trailing white spaces. HTML Use <br>, not <br /> When quoting attributes, please use double quotation marks <a href="google.com" class="info">Link to google</a> CSS Omit unit specification after “0” values margin: 0; padding: 0; Omit leading “0”s in values. font-size: .8em; Separate words in ID and class names by a hyphen. #video-id {} .ads-sample {} Put declarations in alphabetical order. Ignore vendor-specific prefixes for sorting purposes. background: fuchsia; border: 1px solid; -moz-border-radius: 4px; -webkit-border-radius: 4px; border-radius: 4px; color: black; text-align: center; text-indent: 2em; Use a space between the last selector and the declaration block. Use a space after a property name’s colon. h3 { font-weight: bold; } References Google HTML/CSS Style Guide.