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              <div class="container">
	<div class="row">
		<div class="top-s">
			<h1>Increase Font Size</h1>
			
			<input type="range" value="18" min="18" max="24" class="range">
		</div>
				
		<p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Placeat nemo error velit, enim beatae pariatur consequatur aut sequi repudiandae illo doloremque quibusdam sunt esse quam at non culpa ratione unde aspernatur ipsam vitae quos quo voluptatem omnis. Fugiat, assumenda possimus.</p>
		
		<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Repudiandae non distinctio deleniti magnam velit nostrum optio reprehenderit assumenda quo voluptate eum consequuntur quas corporis, id labore? Quaerat libero qui deleniti consequatur numquam praesentium provident vitae explicabo voluptates eum recusandae, itaque neque consectetur omnis iste nostrum maiores dolorum facilis. Non, quisquam!</p>
	</div>
</div>
            
          
!
            
              // Variables
:root {
	--background-color: #1d1c25;
	--font-size: 18px;
	--line-height: 18px;
}

// Global
html, 
body {
	height: 100%;
	margin: 0; padding: 0;
	font-family: 'Lato', sans-serif;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	background-color: var(--background-color);
}


// Grid
.container {
  display: grid;
  grid-template-columns: auto;	
  padding-top: 60px;
	padding-bottom: 60px;
}

.row {
	width: 700px;
  align-self: center;
  justify-self: center;
  padding: 20px;
	
	// 	Top Section
	.top-s {
		display: flex;
		justify-content: space-between;
		align-items: center;
	}
	
	// Title
	h1 {
		background: linear-gradient(45deg, rgba(59,173,227,1) 0%, 
																			 rgba(87,111,230,1) 25%, 
																			 rgba(152,68,183,1) 51%, 
																			 rgba(255,53,127,1) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
	}
	
	// 	Text
	p {	
		margin-bottom: 50px;
		color: #fff;
		line-height: calc(var(--line-height) * 1.5);
		font-size: var(--font-size);
	}
}

// Range Input Customization
input[type="range"] {
  -webkit-appearance: none;
  -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
  width: 200px;
  height: 20px;
  margin: 0;
  border: none;
  padding: 1px 2px;
  border-radius: 14px;
  background: #131319;
  outline: none;
	
  &::-moz-range-track {
    border: inherit;
    background: transparent;
  }
  
	&::-ms-track {
    border: inherit;
    color: transparent;
    background: transparent;
  }
  
	&::-ms-fill-lower, 
	&::-ms-fill-upper {
    background: transparent;
  }
  
	&::-ms-tooltip {
    display: none;
  }
  
	&::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 40px;
    height: 18px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(45deg, rgba(59, 173, 227, 1) 0%, 
																			 rgba(87, 111, 230, 1) 25%, 
																			 rgba(152, 68, 183, 1) 51%, 
																			 rgba(255, 53, 127, 1) 100%);
  }
  
	&::-moz-range-thumb {
    width: 40px;
    height: 18px;
    border: none;
    border-radius: 12px;
    background-image: linear-gradient(to bottom, #529de1 0, #245e8f 100%);
  }
  
	&::-ms-thumb {
    width: 40px;
    height: 18px;
    border-radius: 12px;
    border: 0;
    background-image: linear-gradient(to bottom, #529de1 0, #245e8f 100%);
  }
}
            
          
!
            
              const range 		 = document.querySelector('.range');
const root 			 = document.querySelector(':root');
const rootStyles = getComputedStyle(root);

range.addEventListener('input', function() {
	
	root.style.setProperty('--font-size', this.value + 'px');
	root.style.setProperty('--line-height', this.value + 'px');
	
});
            
          
!
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