Tutorial Drop Caps

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Cross-browser way (extra markup)

Just wrap the first character of the paragraph in a span, then target the span with CSS and style away.

<p>
<span class="firstcharacter">L</span> orem ipsum dolor sit amet, consectetur adipiscing elit. Mauris tristique lobortis orci ac lacinia. Fusce eu purus eget diam vehicula auctor nec eu elit. Morbi consequat facilisis orci vel malesuada. Donec ultrices molestie sollicitudin. Aliquam pharetra libero enim. Donec et suscipit massa. Donec dui odio, dignissim non sodales et, tincidunt a sapien. Phasellus elit nibh, adipiscing sed blandit vel, interdum et arcu.
</p>
.firstcharacter { float: left; color: #903; font-size: 75px; line-height: 60px; padding-top: 4px; padding-right: 8px; padding-left: 3px; font-family: Georgia; }

CSS3 way (no extra markup)

Target the first character of the first paragraph using pseudo class selectors. No extra markup needed, but no IE < 9 support.

<p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris tristique lobortis orci ac lacinia. Fusce eu purus eget diam vehicula auctor nec eu elit. Morbi consequat facilisis orci vel malesuada. Donec ultrices molestie sollicitudin. Aliquam pharetra libero enim. Donec et suscipit massa. Donec dui odio, dignissim non sodales et, tincidunt a sapien. Phasellus elit nibh, adipiscing sed blandit vel, interdum et arcu.
</p>
p:first-child:first-letter { float: left; color: #903; font-size: 75px; line-height: 60px; padding-top: 4px; padding-right: 8px; padding-left: 3px; font-family: Georgia; }

Tutorial Diagonal Graph Paper Gradient

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#example-gradient {
  height: 200px;
  margin: 0 0 20px 0;
  background-color: #eaeaea;
  background-size: 20px 20px;
  background-image:
     -webkit-repeating-linear-gradient(45deg, rgba(0, 191, 255, .5), rgba(0, 191, 255, .5) 1px, transparent 1px, transparent 15px),
     -webkit-repeating-linear-gradient(-45deg, rgba(255, 105, 180, .5), rgba(255, 105, 180, .5) 1px, transparent 1px, transparent 15px);
  background-image:
     -moz-repeating-linear-gradient(45deg, rgba(0, 191, 255, .5), rgba(0, 191, 255, .5) 1px, transparent 1px, transparent 15px),
     -moz-repeating-linear-gradient(-45deg, rgba(255, 105, 180, .5), rgba(255, 105, 180, .5) 1px, transparent 1px, transparent 15px);
  background-image:
     -o-repeating-linear-gradient(45deg, rgba(0, 191, 255, .5), rgba(0, 191, 255, .5) 1px, transparent 1px, transparent 15px),
     -o-repeating-linear-gradient(-45deg, rgba(255, 105, 180, .5), rgba(255, 105, 180, .5) 1px, transparent 1px, transparent 15px);
  background-image:
     repeating-linear-gradient(45deg, rgba(0, 191, 255, .5), rgba(0, 191, 255, .5) 1px, transparent 1px, transparent 15px),
     repeating-linear-gradient(-45deg, rgba(255, 105, 180, .5), rgba(255, 105, 180, .5) 1px, transparent 1px, transparent 15px);
}

Example

Based on original code from Christopher Burton. Also and example "without the dot".

Tutorial Custom Radio Buttons

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#foo:checked::before,
input[type="checkbox"] {
    position:absolute;
    clip: rect(0,0,0,0);
    clip: rect(0 0 0 0);
}

#foo:checked,
input[type="checkbox"] + label::before {
    content: url('checkbox.png');
}

input[type="checkbox"]:checked + label::before {
    content: url('checkbox-checked.png');
}

#foo doesn't reference any particular element, it's there purely to prevent browsers from implementing the later selectors if it doesn't understand that (since most browsers will drop the entire selector if any part of it fails).

Reference URL

Tutorial Custom File Input Styling in WebKit/Blink

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<input type="file" class="custom-file-input">
.custom-file-input::-webkit-file-upload-button {
  visibility: hidden;
}
.custom-file-input::before {
  content: 'Select some files';
  display: inline-block;
  background: -webkit-linear-gradient(top, #f9f9f9, #e3e3e3);
  border: 1px solid #999;
  border-radius: 3px;
  padding: 5px 8px;
  outline: none;
  white-space: nowrap;
  -webkit-user-select: none;
  cursor: pointer;
  text-shadow: 1px 1px #fff;
  font-weight: 700;
  font-size: 10pt;
}
.custom-file-input:hover::before {
  border-color: black;
}
.custom-file-input:active::before {
  background: -webkit-linear-gradient(top, #e3e3e3, #f9f9f9);
}

Demo

See the Pen Custom File Inputs in WebKit/Blink by Chris Coyier (@chriscoyier) on CodePen

Fair warning: it doesn't show you the file name selected, but you might be able to tweak it to do that. I find typically these days you're triggering an event after file selection and snagging the data that way anyway.

Reference URL

Tutorial Custom Checkboxes and Radio Buttons

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The selectors here are specific to Wufoo markup, but the concepts at work can work for any form. The overall idea is that you make the default radio buttons and checkboxes invisible by setting their opacity to zero, and replace them with graphics. Then use the :checked selector to alternate the graphics between their checked and unchecked versions.

/* 
    Hide the original radios and checkboxes
    (but still accessible)
    
    :not(#foo) > is a rule filter to block browsers
                 that don't support that selector from
                 applying rules they shouldn't
       
*/
li:not(#foo) > fieldset > div > span > input[type='radio'], 
li:not(#foo) > fieldset > div > span > input[type='checkbox'] {
    
    /* Hide the input, but have it still be clickable */
    opacity: 0;
    
    float: left;
    width: 18px;
}


li:not(#foo) > fieldset > div > span > input[type='radio'] + label,
li:not(#foo) > fieldset > div > span > input[type='checkbox'] + label {
    margin: 0;
    clear: none;
    
    /* Left padding makes room for image */
    padding: 5px 0 4px 24px;

    /* Make look clickable because they are */
    cursor: pointer;
    
    background: url(off.png) left center no-repeat; 
}

/*
    Change from unchecked to checked graphic
*/
li:not(#foo) > fieldset > div > span > input[type='radio']:checked + label {
    background-image: url(radio.png);
}
li:not(#foo) > fieldset > div > span > input[type='checkbox']:checked + label {
    background-image: url(check.png);
}

Reference URL

Tutorial CSS Triangle

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HTML

You can make them with a single div. It's nice to have classes for each direction possibility. 

<div class="arrow-up"></div>
<div class="arrow-down"></div>
<div class="arrow-left"></div>
<div class="arrow-right"></div>

CSS

The idea is a box with zero width and height. The actual width and height of the arrow is determined by the width of the border. In an up arrow, for example, the bottom border is colored while the left and right are transparent, which forms the triangle.

.arrow-up {
	width: 0; 
	height: 0; 
	border-left: 5px solid transparent;
	border-right: 5px solid transparent;
	
	border-bottom: 5px solid black;
}

.arrow-down {
	width: 0; 
	height: 0; 
	border-left: 20px solid transparent;
	border-right: 20px solid transparent;
	
	border-top: 20px solid #f00;
}

.arrow-right {
	width: 0; 
	height: 0; 
	border-top: 60px solid transparent;
	border-bottom: 60px solid transparent;
	
	border-left: 60px solid green;
}

.arrow-left {
	width: 0; 
	height: 0; 
	border-top: 10px solid transparent;
	border-bottom: 10px solid transparent; 
	
	border-right:10px solid blue; 
}

Examples

Dave Everitt writes in:

For an equilateral triangle it's worth pointing out that the height is 86.6% of the width so (border-left-width + border-right-width) * 0.866% = border-bottom-width