html - How can I change the border width and height so it wraps around the text? - Stack Overflow
Control an element's width and height - Create Web Page Layouts With CSS - OpenClassrooms
mask-border-width | Codrops
css - div with % width and px border - Stack Overflow
CSS Inner Border | Working Principle of Inner Border with Examples
border-image-slice - CSS: Cascading Style Sheets | MDN
CSS Border | Border Width | Border Color
box-sizing | CSS-Tricks - CSS-Tricks
html - CSS: Width in percentage and Borders - Stack Overflow
CSS | border-width Property - GeeksforGeeks
Borders | HTML Dog
CSS | border-width Property - GeeksforGeeks
Box model
CSS Border Size
html - css border changes the div size completely? - Stack Overflow
CSS Border | o7planning.org
Basic CSS: Borders in CSS
Box model
html - Calculation of border-image-width with border-image-outset - Stack Overflow
Borders | Webflow University
CSS | border-top-width Property - GeeksforGeeks
Curso gratis de HTML y CSS. aulaClic. 10 - CSS3. Unidades. Color. Margen. Fondo. Borde. Propiedad box-sizing
