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About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

     

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

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HTML

            
              <figure>
	<h1>is<br />it</h1>
	<h2><span data-letter="k">k</span><span data-letter="i">i</span><span data-letter="n">n</span><span data-letter="d">d</span></h2>
	<h2><span data-letter="t">t</span><span data-letter="r">r</span><span data-letter="u">u</span><span data-letter="e">e</span></h2>	
	<h2><span data-letter="n">n</span><span data-letter="e">e</span><span data-letter="c">c</span><span data-letter="e">e</span><span data-letter="s">s</span><span data-letter="s">s</span><span data-letter="a">a</span><span data-letter="r">r</span><span data-letter="y">y</span></h2>	
	<h3>??<br />??</h3>
</figure>
<script id="effect_vertexShader" type="x-shader/x-vertex">
  varying vec2 vUv;
  void main() {
    vUv = uv;gl_Position = projectionMatrix * modelViewMatrix * vec4(position,1);
  }
</script>
<script id="effect_fragmentShader" type="x-shader/x-fragment">
varying vec2 vUv;
uniform vec2 resolution;
uniform float time;
float usin(float value) {
	return sin(value * 2.45873)*0.05 + 0.05;
}
float noise(vec2 pos, float time) {
	pos.x += usin(pos.y * 2.1 + 0.01) ;
	pos.y += usin(.01);
	float valueX = 0.0;
	valueX += usin(pos.x + time * .6 + usin(pos.y * 0.5 + 0.1) * .5);
	valueX += usin(pos.y + 10.10 + usin(pos.y * 2.5 + time * 0.1) * usin(pos.x * 0.05)* .05) ;
	valueX /= .025;
	float valueY = 0.0;
	valueY += usin(pos.x + usin(pos.x * .5+ 0.2)*.05);
	valueY += usin(pos.y * 0.1 + usin(pos.x * 1.1  + time * 0.1) * usin(pos.y * .05)* 0.05);
	valueY /= .5;
	float value = valueX * valueY;
	return value;
}
void main(){
	vec2 sourceCoord = vUv - 122.5;
	sourceCoord.x *= resolution.x / resolution.y;
	vec4 outputColour = vec4(0.0, 0.0, 0.0, 1.0);
	float noise1 = noise(sourceCoord, time);
	float noise2 = noise(sourceCoord * 0.5 + noise1 + 2.232, time);
	float noise3 = noise(sourceCoord * 0.1 + vec2(noise1, noise2) + 21.232, time);
	float noiseVal = (noise1 + noise2 + noise3)/1.0;
	for (int i = 1; i < 20; i++) {
		noiseVal = usin(noiseVal+time*.5);
	}
	noiseVal = noise(sourceCoord * 1.10 + noiseVal + .62, time);
	outputColour.rgb = vec3(noiseVal*1.0);
	outputColour.b = cos(noiseVal*6.100);
	outputColour.g = cos(noiseVal*2.100);
	outputColour.r = cos(noiseVal*3.100);
	gl_FragColor = outputColour;
}
</script>
!

CSS

            
              @mixin fluid-type($min-font-size: 12px, $max-font-size: 18px, $lower-range: 420px, $upper-range: 900px) {
	font-size: calc(#{$min-font-size} + #{(($max-font-size / ($max-font-size * 0 + 1)) - ($min-font-size / ($min-font-size * 0 + 1)))} * ( (100vw - #{$lower-range}) / #{(($upper-range / ($upper-range * 0 + 1)) - ($lower-range / ($lower-range * 0 + 1)))}));
	@media screen and (max-width: $lower-range) {
		font-size: $min-font-size;
	}
	@media screen and (min-width: $upper-range){
		font-size: $max-font-size;
	}
}
@font-face {
  font-family: 'Cardinal';
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/253981/cardinalfruit-medium-TRIAL.eot');
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/253981/cardinalfruit-medium-TRIAL.eot?#iefix') format('embedded-opentype'),
       url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/253981/cardinalfruitw-medium-TRIAL.woff') format('woff');
  font-style:   normal;
  font-weight:  400;
}
@font-face {
  font-family: 'Sporting Grotesque';
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/253981/Sporting_Grotesque-Bold.eot');
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/253981/Sporting_Grotesque-Bold.eot?#iefix') format('embedded-opentype'),
       url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/253981/Sporting_Grotesque-Bold.woff') format('woff'),
       url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/253981/Sporting_Grotesque-Bold.ttf')  format('truetype');
  font-style:   normal;
  font-weight:  400;
}
html{
	-webkit-font-smoothing: antialiased !important;
	text-shadow: 1px 1px 1px rgba(0,0,0,0.004);
	transition: background-color 2s ease;
	@include fluid-type(6px, 40px, 320px, 2400px);
}
figure{
	position:absolute;
	width:40vw;
	max-width:420px;
	height:57vw;
	max-height:599px;
	top:50%;
	left:50%;
	text-align: center;
	color: white;
	overflow:hidden;
	box-shadow: 0px 0px 10px rgba(0,0,0,0.2);
	transform: translate3d(-50%, -50%, 0);
	perspective: 800px;
	background: rgba(255,255,255,1);
	&:after{
		content:'';
		position:absolute;
		top:0;
		left:0;
		width:100%;
		height:100%;
		z-index:10;
		transition: background-color 2s ease;
		opacity:1;
		mix-blend-mode:exclusion;
	}
	canvas{
		opacity:0.9;
		z-index:1;
	}
	h1, h3{
		position: absolute;
		left:50%;
		z-index:100;
		color: white;
		z-index:100;
		font-family:'Sporting Grotesque', sans-serif;
		text-transform: uppercase;
		font-size: 50%;
		line-height:1.5;
		letter-spacing: 0.2rem;
		&:after{
			//content:'';
			position:absolute;
			height:4vw;
			width:4vw;
			top:50%;
			left:50%;
			opacity:0.6;
			transform:translateY(-50%) translateX(-50%) rotate(45deg);
			border:1px solid white;
			border-radius:10px;
		}
	}
	h1{top:calc(30%);transform:translateX(-50%) translateY(-100%);}
	h3{bottom: calc(30%);transform:translateX(-50%) translateY(100%);}
	h2{
		position: absolute;
		top:50%;
		left:50%;
		z-index:100;
		font-size:250%;
		line-height:0;
		font-family:'Cardinal', serif;
		text-transform:uppercase;
		white-space: nowrap;
		backface-visibility:hidden;
		transform: translate3d(-50%, -50%, 0) scaleY(0.5);
		transform-origin: 50% 50%;
		transition: transform 0s ease 1s;
		span{
			position: relative;
			display:inline-block;
			color:transparent;
			&:after{
				top:50%;
				left:50%;
				content:attr(data-letter);
				position:absolute;
				color: white;
				transform: translate3d(-50%, -50%, 0) rotate3d(1,0,0,90deg);
				transform-origin: 50% 0%;
				transition: transform .2s, opacity .2s;
			}
			@for $i from 20 through 1 {
				&:nth-of-type(#{$i}){
					&:after{
						transition: color .5s ease, transform .2s ease 0.1s * $i, opacity .2s ease 0s * $i;
					}
				}
			}	
			
		}	
		&:nth-of-type(3){
			span{
				@for $i from 20 through 1 {
					&:nth-of-type(#{$i}){
						&:after{
							transition: color .5s ease, transform .2s ease 0.05s * $i, opacity .2s ease 0s * $i;
						}
					}
				}					
			}
		}
	}
}
.first{
	background-color:#fce8e5;
		figure:after{
		background-color:#f99689;
	}
	figure h2:nth-of-type(1){
		transform: translate3d(-50%, -50%, 0) scaleY(2.5);
		transition: transform 4s ease;
		transform-origin: 50% 50%;
		span{	
			@for $i from 1 through 20 {
				&:nth-of-type(#{$i}){
					&:after{
						transform: translate3d(-50%, -50%, 0) rotate3d(0,1,0,0deg);
						transition: color .5s ease, transform .5s ease .2s * $i, opacity .5s ease .2s * $i;
					}
				}
			}
		}
	}
}
.second{
	background-color:#eafcf8;	
	figure:after{
		background-color:#89f9e0;
	}
	figure h2{
		&:nth-of-type(2){
			transform: translate3d(-50%, -50%, 0) scaleY(2.5);
			transition: transform 4s ease;
			transform-origin: 50% 50%;
			span{
				@for $i from 1 through 20 {
					&:nth-of-type(#{$i}){
						&:after{
							transform: translate3d(-50%, -50%, 0) rotate3d(0,1,0,0deg);
							transition: color .5s ease, transform .5s ease .2s * $i, opacity .5s ease .2s * $i;
						}
					}
				}
			}
		}
	}
}	
.third{
	background-color:#fff8ed;
	figure:after{
		background-color:#ffc054;
	}
	figure h2{
		&:nth-of-type(3){
		transform: translate3d(-50%, -50%, 0) scaleY(2.5);
		transition: transform 4s ease;	
			span{
			 	@for $i from 1 through 20 {
					&:nth-of-type(#{$i}){
						&:after{
							transform: translate3d(-50%, -50%, 0) rotate3d(0,1,0,0deg);
							transition: color .5s ease, transform .5s ease .08s * $i, opacity .5s ease .1s * $i;
						}
					}
				}
			}
		}
	}
}
!

JS

            
              c = 1;
setInterval(function(){
	c++;
	
	if(c === 1){
		$('html').attr('class','first');	
	}
	if(c === 2){
		$('html').attr('class','second');	
	}
	if(c === 3){
		$('html').attr('class','third');
		c = 0;
	}	
}, 3500);
var bgColor = 0x000000;
var bgAlpha = 0;
var renderer = null;
var clock = null;
var effectScene = null;
var effectCamera = null;
var effectShader = null;
var effectShaderMaterial = null;
var effectSurfaceMesh = null;
var time = 0;
var tMY = 0;
var tMX = 0;
renderer = new THREE.WebGLRenderer({antialias: false, alpha: true});
renderer.setSize($('figure').width(), $('figure').height());
renderer.setClearColor(bgColor, bgAlpha);
$('figure').append(renderer.domElement);
clock = new THREE.Clock();
effectScene = new THREE.Scene();
effectCamera = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
effectShader = {
	uniforms: {
		"time":   { type: "f", value: 0 },
		"mouse": {type: "2f", value: [0, 0]},
		"viewSize":   { type: "2f", value: [1024, 768] },
		"image1Size":   { type: "2f", value: [1024, 768]},
		"resolution": {type: "2f", value: [$('figure').width(), $('figure').height()]}
	},
	vertexShader: document.getElementById('effect_vertexShader').textContent,
	fragmentShader: document.getElementById('effect_fragmentShader').textContent
};
effectShaderMaterial = new THREE.ShaderMaterial(effectShader);
effectSurfaceMesh = new THREE.Mesh(new THREE.PlaneBufferGeometry( 2, 2 ), effectShaderMaterial);
effectScene.add(effectSurfaceMesh);  
window.onresize = updateViewportSize;
updateViewportSize();
render();
function updateViewportSize() {
  renderer.setSize($('figure').width(), $('figure').height());
  effectShaderMaterial.uniforms['viewSize'].value = [$('figure').width(), $('figure').height()];
  effectCamera.aspect = $('figure').width(), $('figure').height();
  effectCamera.updateProjectionMatrix();
};
function render(name) {
	time = clock.getElapsedTime();
	tMX += tMX*0.01;
	tMY += tMY*0.01;  
	renderer.render(effectScene, effectCamera);
	effectShaderMaterial.uniforms['time'].value = time;
	requestAnimationFrame(render);
};
!
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