Can you provide me with some examples on CSS?

html, body {

padding: 0; 

margin: 0;

font-family: roboto;

font-size: 15px;

color: #000;

background: transparent; 

line-height: 23px;

}

a, a:hover, a:focus {

text-decoration: none;

}

ul, ol { list-style-type: none; margin: 0; padding: 0; } 

body {background-color: blue;

}

p {

    background-color: red;

    width: 300px;

    border: 25px solid #ff6347;

    padding: 25px;

    margin: 25px;

    color: white;

    text-align: center;

    text-shadow: 3px 2px black;

    position: absolute;

    left: 20%;

    top: 30%;

    width: 50%;

    text-align: center;

    font-size: 18px;

}

@import url("something.css");

body {

  margin: 0;

  padding: 3em 6em;

  font-family: tahoma, arial, sans-serif;

  color: #000;

}

#navigation a {

  font-weight: bold;

  text-decoration: none !important;

}

search on youtube about elzer school

I would like to describe to you two scenarios.

1. build your own CSS files and be sure to apply different browser parameters like the font and other parameters with respect to responsivity. Make sure to start from Mobile-first UI view.
2. you can use generic CSS frameworks like JQueryUI, Bootstrap and other. Bootstrap has good documentation and examples.

RESPONSIVE:

there is a countable amount of screens. 

Example:

1. to for small monitors "mobiles"
2. to for tablets
3. to for laptop and desktop monitor
4. to~ for wide screens

Cross-browser compatibility:

Example:

firefox, internet explorer, chrome, safari

.class_name{

//chrome and safari

-webkit-border-radius:3px;

// firefox

-moz-border-radius:3px;

}

as you see every cross-browser compatibility applied that every company has there own set of parameters.

https://www.w3schools.com/css/

Good Luck

You Can See This Site

https://www.w3schools.com/css/

You will really benefit from it

https://learn.shayhowe.com/html-css/   i think help you