How Does CSS Stylesheet Override Order Determine Style Priority?

CSS Stylesheet Override Order

In an HTML header, multiple stylesheets may be referenced. The cascading element of CSS determines the order in which these stylesheets take priority and override each other.

Overriding Rules

According to the CSS2 specification, rules defined in the following order take precedence:

• Specifity: Rules with a higher specificity level (based on the number of IDs, classes, and element names) have priority.
• Importance: The "!important" declaration can override other rules of equal or lower specificity.
• Order of Appearance: When rules have the same specificity and importance, the rule that appears last in the cascading order takes precedence.

Example

In the HTML header provided, "master.css" is referenced after "styles.css". Therefore, in the scenario you described, where "styles.css" defines specific margin and border rules and "master.css" contains general reset rules, the last-listed rule in "master.css" will override the specific rules in "styles.css".

Conclusion

The cascading principles in CSS apply to stylesheet references as well as to individual CSS declarations. By understanding these principles, developers can effectively control the appearance of their web pages by leveraging the order of stylesheet references and the specificity of their CSS rules.

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