Best view in Firefox with flexbox enabled. Webkit browser need to fix a bug in order to view the perfect vertical rhythm.

Additional polyfills need to make older browsers to work.

Features:

• Modular CSS framework
• 1.6180339887498948482 block__unitless line height
• golden ratio pull-quote
• BEM
• 1 to 12 equal division column grid powered by CSS3 flexbox
• 1 to 4 golden ratio division column grid powered by CSS3 flexbox
• Fibonacci sequence in h1 h2 h3 h4 h5 h6 and other helper like .h0 - .h6
• Use 1em or 16px for readable text
• Use normalize.css
• Use CSS variable
• Media object
• incremental leading below 16px
• Responsive support for 300px, 748px, 978px, 1218px and 1378px

Include Natural in your page

<link rel="stylesheet" href="natural.css">

Golden ratio grid

<nav class='block'>
	<div class='block__g-unit block__size1of4'>
		<p class='text-centering'>g1</p>
	</div>
	<div class='block__g-unit block__size2of4'>
		<p class='text-centering'>g2</p>
	</div>
	<div class='block__g-unit block__size3of4'>
		<p class='text-centering'>g3</p>
	</div>
	<div class='block__g-unit block__size4of4'>
		<p class='text-centering'>g4</p>
	</div>
</nav>	

Simple flexible grid

<nav class='block'>
	<div class='block__unit block__size1of2'>
		<p class='text-centering'>1/2</p>
	</div>
	<div class='block__unit block__size1of2'>
		<p class='text-centering'>1/2</p>
	</div>
</nav>

Simple flexible grid with container

<nav class='block'>
	<div class='container'>
		<div class='block__unit block__size1of2'>
			<p class='text-centering'>1/2</p>
		</div>
		<div class='block__unit block__size1of2'>
			<p class='text-centering'>1/2</p>
		</div>
	</div>
</nav>

Simple flexible grid with block__block__gutter

<nav class='block block__block__gutter'>
	<div class='container'>
		<div class='block__unit block__size1of2'>
			<p class='text-centering'>1/2</p>
		</div>
		<div class='block__unit block__size1of2'>
			<p class='text-centering'>1/2</p>
		</div>
	</div>
</nav>

Simple flexible grid with nesting

<nav class='block'>
	<div class='container'>
		<div class='block__unit block__size1of2'>
			<p class='text-centering'>1/2</p>
		</div>
		<div class='block__unit block__size1of2'>
			<div class='block'>
				<div class='block__unit block__size1of2'>
					<p class='text-centering'>1/2</p>
				</div>
				<div class='block__unit block__size1of2'>
					<p class='text-centering'>1/2</p>
				</div>
			</div>
		</div>
	</div>
</nav>

Mix block with block__block__gutter and block without block__block__gutter

<nav class='block block__block__gutter'>
	<div class='container'>
		<div class='block__unit block__size1of2'>
			<p class='text-centering'>1/2</p>
		</div>
		<div class='block__unit block__size1of2'>
			<div class='block'>
				<div class='block__unit block__size1of2'>
					<p class='text-centering'>1/2</p>
				</div>
				<div class='block__unit block__size1of2'>
					<p class='text-centering'>1/2</p>
				</div>
			</div>
		</div>
	</div>
</nav>

Media object

<div class='media'>
	<img src='http://placekitten.com/96/139' alt='' class='media_img'>
	<p class='media_body'>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec porttitor lacinia turpis nec pulvinar. Duis consequat tincidunt odio, non molestie purus tempus eget. Aliquam nec nisi non lacus auctor semper nec ac felis. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec porttitor lacinia turpis nec pulvinar. Duis consequat tincidunt odio, non molestie purus tempus eget.</p>
</div>