css властивість border-top-style
css - How to square the sides of top-border? - Stack Overflow
css - How can I make a gradient top border with a radius? - Stack Overflow
ボックスモデルを極めるためのCSSプロパティ、10選：D89 CSS/スタイルシート リファレンス辞典（4） - ＠IT
CSS border-top-style Property
CSS border-radius complete property guide | Rounded Corners
Cajas: márgenes, rellenos y bordes
Modelo de caja
border-image-slice - CSS: Cascading Style Sheets | MDN
CSS border-top Property
CSS Logical Properties and Values | CSS-Tricks - CSS-Tricks
CSS Border Property in HTML: Part 2
CSS border-top-style property - Studytonight
CSS border-top-style Property - server2client.com
CSS border-color Property - Scaler Topics
Box rendering type
How to Create a Border with CSS | Webucator
CSS border-top-color Property - GeeksforGeeks
border-inline | CSS-Tricks - CSS-Tricks
Css/Training/borders - W3C Wiki
border-bottom-right-radius - CSS | MDN
border-top-style - آموزش طراحی وب
CSS border-top-color Property
CSS Borders | Border in CSS | Scaler Topics
