You may have noticed that all of the examples in this section had borders of exactly the same width. That's because we didn't define a width, so it defaulted to a certain value. Next, we'll find out about that default, and much more.

There are four ways to assign a width to a border: you can give it a length value such as 4px or 0.1em or use one of three keywords. These keywords are

Saturday 18th of November 2017 04:53:07 PM

Style Guide

CSS: Steal These Style Sheets!

The two CSS files linked from this page can be used as-is, or modified to the design requirements of your site.

Simple Style Sheet
  1. Sets body margins and padding to zero (no offset);
  2. establishes text, background, and various stage link colors;
  3. sets text font family to Georgia, Palatino, or equivalent but does not set size (sophisticated style sheet does that);
  4. establishes link rollover effect;
  5. sets up paragraph leading (line-height) of 150%;
  6. turns off gaps and borders around images
  7. establishes pseudo-classes for control of vertical whitespace
  8. establishes font-family and relative size relationships of headlines and subheads—also their margins;
  9. provides additional pseudo-classes for special design requirements
  10. assuming CSS file resides in /styles/ directory within root directory, file should be linked to from header thusly:
    <link rel="Stylesheet" href="/styles/simple.css" type="text/css" media="screen" />
Sophisticated Style Sheet
  1. Sets paragraph font size to small (CSS font-size keyword), enabling text to be resized in most browsers;
  2. works around CSS bugs in IE4/5/5.5/Win and Opera 4/5;
  3. hides size rule from Netscape 4
  4. assuming CSS file resides in /styles/ directory within root directory, file should be linked to from header thusly:
    <style type="text/css" media="all">@import "/styles/sophisto.css";</style>

Linking

The following shows the proper way to link to both style sheets:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
        <head>

<title>NYPL: Your Site Title</title>

<link rel="stylesheet" href="/styles/simple.css" type="text/css" media="screen" />

<style type="text/css" media="all">@import "/styles/sophisto.css";</style>

<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="expires" content="-1" />
<meta http-equiv= "pragma" content="no-cache" />
<meta name="author" content="Your Name or New York Public Library" />
<meta name="robots" content="all" />
<meta name="MSSmartTagsPreventParsing" content="true" />
<meta name="description" content="Your subject matter described." />
<meta name="keywords" content="your, key, words, here" />

        </head>
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to let the width default to medium and the colorto be inherited from the element itself. All you need in such a caseis the following:

P.roof {border-top: dashed;}

Another thing to note is that since each of these"border-side" properties applies only to a specific side,there isn't any possibility of value replication -- itwouldn't make any sense. There can only be one of each type ofvalue: that is, only one width value, only one color value, and onlyYoumay have noticed that in almost every circumstance, where we set aforeground color, we also set a background color. In general, this isa good idea. Since you don't know what styles a user may havepredefined, you don't know how your styles might interact withthem. Remember the example where links ended up being white on white?That's the sort of thing we want to avoid.

Let's explore this in a little more detail. Assume the