CSS (Cascading Style Sheets) is a style sheet language for describing the visual presentation of HTML documents. Together with HTML and JavaScript, CSS is one of the three core languages of the World Wide Web and is developed by the W3C (World Wide Web Consortium).
Technical basics
- CSS was proposed by Håkon Wium Lie in 1994 and first standardized in 1996
- Separates content (HTML) from presentation (CSS)
- Enables responsive design (different presentation on different devices)
- Current version: CSS3 (modular structure, no explicit CSS4)
Use in the appointment scheduling system
In the booking form, custom CSS allows the visual appearance to be fully adapted to the service provider's corporate design:
- Custom fonts and font sizes
- Adjustment of colors, backgrounds and borders
- Positioning and spacing of form elements
- Individual button design
Without CSS knowledge, preconfigured color schemes are usually available.