CodePen

HTML

            
              <body>
	<div id="page">
		<div class="block">
			<ul>
				<li>
					<a href="">BUTTON</a>
				</li>
				
				<li>
					<a href="">BUTTON</a>
				</li>
				
				<li>
					<a href="">BUTTON</a>
				</li>
			</ul>
		</div>
	</div>
</body>
            
          
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CSS

            
              	* {
		margin: 0px;
		padding: 0px;
	}

	html, body, #page {
		height: 100%;
	}

	body > #page {
		height: auto;
		min-height: 100%;
	}
	
	.block {
		display: block;
		width: 100px;
		height: auto;
		margin: auto;
	}

	ul {
		list-style: none;
	}
            
          
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JS

            
              
            
          
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