Los 12 trucos de CSS más usados… y necesarios

<div id=”container”>
<b class=”rtop”>
<b class=”r1″></b>
<b class=”r2″></b>
<b class=”r3″></b>
<b class=”r4″></b>
</b>
<!–content goes here –>
<b class=”rbottom”>
<b class=”r4″></b>
<b class=”r3″></b>
<b class=”r2″></b>
<b class=”r1″></b>
</b></div>

.rtop, .rbottom{display:block}
  .rtop *, .rbottom *{display: block; height: 1px; overflow: hidden}
  .r1{margin: 0 5px}
  .r2{margin: 0 3px}
  .r3{margin: 0 2px}
  .r4{margin: 0 1px; height: 2px}

<ol><li><p>This is line one</p>
</li><li><p>Here is line two</p>
</li><li><p>And last line</p>
</li></ol>

ol {font: italic 1em Georgia, Times, serif;color: #999999;}

ol p {font: normal .8em Arial, Helvetica, sans-serif;
color: #000000;}

<form><label for=”name”>Name</label>
<input id=”name” name=”name”><br>
<label for=”address”>Address</label>
<input id=”address” name=”address”><br>
<label for=”city”>City</label>
<input id=”city” name=”city”><br>
</form>

label,input {
display: block;
width: 150px;
float: left;
margin-bottom: 10px;
}

label {
text-align: right;
width: 75px;
padding-right: 20px;
}

br {clear: left;
}

blockquote:first-letter {
background: url(images/open-quote.gif) no-repeat left top;
padding-left: 18px;
font: italic 1.4em Georgia, “Times New Roman”, Times, serif;
}

<h1><span></span>CSS Gradient Text</h1>

h1 {font: bold 330%/100% “Lucida Grande”;
position: relative;color: #464646;
}
h1 span {
background: url(gradient.png) repeat-x;
position: absolute;
display: block;
width: 100%;height: 31px;
}

<!–[if lt IE 7]>
<style>
h1 span {
background: none;
filter: progid:DXImageTransform.Microsoft.AlphaImageLoader
(src=’gradient.png’, sizingMethod=’scale’);}</style>
<![endif]–>

div{
height:100px;
}
div *{
margin:0;
}
div p{
line-height:100px;
}

<p>Content here</p>

<div class=”roundcont”>
<div class=”roundtop”>
<img src=”tl.gif” alt=”"width=”15″
height=”15″ class=”corner”
style=”display: none” /></div>

CONTENT

<div class=”roundbottom”>
<img src=”bl.gif”
alt=”"width=”15″
height=”15″
class=”corner”style=”display: none” />
</div></div>

.roundcont {
width: 250px;
background-color: #f90;
color: #fff;}

.roundcont p {
margin: 0 10px;
}

.roundtop {
background: url(tr.gif) no-repeat top right;
}

.roundbottom {
background: url(br.gif) no-repeat top right;
}

img.corner {
width: 15px;
height: 15px;
border: none;
display: block !important;
}

<img src=”image.gif”
class=”class1 class2″ alt=”" />

.class1 {
border:2px solid #666;
}

.class2 {
padding:2px;
background:#ff0;
}

<div id=”container”></div>

#container {
margin:0px auto;
}

<p class=”introduction”> This paragraph has the class “introduction”.
If your browser supports the pseudo-class “first-letter”,
the first letter will be a drop-cap. </p>

p.introduction:first-letter {
font-size : 300%;
font-weight : bold;
float : left;
width : 1em;
}

a{
white-space:nowrap;
}

#main{
overflow:hidden;
}

html{
overflow:-moz-scrollbars-vertical;
}

textarea{
overflow:auto;
}