I'm a CSS beginner who recently created an app. I've encountered some errors and warnings when validating my CSS code:
https://i.stack.imgur.com/g4MUz.png
https://i.stack.imgur.com/Es1DE.png
Could someone kindly explain these errors and warnings to me, along with solutions on how to fix them for successful CSS validation?
Despite these issues, the app is still functioning properly.
Here is a snippet of my CSS code:
/*----------------------------CSS reset------------------------------*/
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
margin: 0;
padding: 0;
...