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Working Example of calc() on font-size and line-hieght

A Pen By Martino Stenta

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HTML

            
              <div class="row row-big-card">
	<div class="cont">
		<a href="#" class="card-link">
			<div class="card-img">
				<div style="background-image:url(https://images.unsplash.com/photo-1528873981-36c6afde7b9d);"></div>
			</div>
			<div class="card-inner">
				<h3>A very big title</h3>
				<h4>Some basic subtitle</h4>
				<div class="inner-text">
					<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. ...</p>
				</div>
				<span class="cta-card">Read on</span>
			</div>
		</a>
		
	</div>
</div>
!

CSS

            
              <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Montserrat:400,700|Roboto+Slab:400,700" />

html {
	box-sizing: border-box;
}

*,
*:before,
*:after {
	/* Inherit box-sizing to make it easier to change the property for components that leverage other behavior; see https://css-tricks.com/inheriting-box-sizing-probably-slightly-better-best-practice/ */
	box-sizing: inherit;
}
body {
    color: #1A1A1A;
}
h1, h2, h3, h4, h5, h6 {
    clear: both;
    font-family: 'Montserrat', sans-serif;
}
.row {
    width: 100%;
    font-family: 'Roboto Slab', serif;
    font-size: 19px;
    line-height: 33px;
}

.row-big-card .cont {
    box-shadow: 0 0 30px 0 rgba(0,0,0,.15);
    margin: 30px auto;
    width: calc(100% - 40px);
    max-width: 1760px;
    padding: 0;
    position: relative;
}

a.card-link {
    color: #1A1A1A;
    display: block;
    text-decoration: none;
}

.card-img {
    padding-left: 45%;
    position: relative;
}

.row-big-card .cont .card-inner {
    padding: 40px 20px 0 60px;
    position: absolute;
    z-index: 3;
    top: 0;
    left: 0;
    bottom: 0;
    background: white;
    width: 40%;
}

.card-img div {
    display: block;
    -webkit-clip-path: polygon(0 0, 100% 0, 100% 100%, 8% 100%);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 8% 100%);
    -webkit-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out;
    background-repeat: no-repeat;
    -webkit-background-size: cover;
    background-size: cover;
    background-position: center;
    width: 100%;
    padding-bottom: 64%;
}

.card-inner h3 {
    font-size: 76px;
    line-height: 82px;
    letter-spacing: -1px;
    margin: 0 0 1.5%;
    -webkit-transition: all .1s ease-in-out;
    transition: all .1s ease-in-out;
}

.inner-text p {
    margin: 1.5% 0 0;
    -webkit-transition: all .1s ease-in-out;
    transition: all .1s ease-in-out;
}
.inner-text {
    margin: 4.5% 0;
    padding: 3% 0 0;
    position: relative;
}
.inner-text:before {
    content: '';
    position: absolute;
    display: block;
    width: 60px;
    height: 6px;
    background: #1A1A1A;
    top: 0;
    left: 0;
}

.card-inner h4 {
    font-size: 24px;
    line-height: 29px;
    margin: 0;
    -webkit-transition: all .1s ease-in-out;
    transition: all .1s ease-in-out;
}

.row-big-card .cont:hover .card-img img, .row-big-card .cont:hover .card-img div {
    -webkit-clip-path: polygon(0 0, 92% 0, 100% 100%, 8% 100%);
    clip-path: polygon(0 0, 92% 0, 100% 100%, 8% 100%);
}

span.cta-card {
    display: inline-block;
    font-size: 18px;
    line-height: 82px;
    text-transform: uppercase;
    padding: 0 13%;
    border: 1px solid #1A1A1A;
    color: #1A1A1A;
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    -webkit-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out;
}

a.card-link:hover span.cta-card {
    background: #1A1A1A;
    color: white;
}

@media all and (max-width: 1774px) {
	.card-inner h3 {
		font-size: calc(30px  + (76 - 30)*(100vw - 1100px)/(1774 - 1100));
		line-height: calc(36px  + (82 - 36)*(100vw - 1100px)/(1774 - 1100));
	}
	.card-inner h4 {
		font-size: calc(20px  + (24 - 20)*(100vw - 1100px)/(1774 - 1100));
		line-height: calc(22px  + (29 - 22)*(100vw - 1100px)/(1774 - 1100));
	}
	.card-inner p {
		font-size: calc(16px  + (19 - 16)*(100vw - 1100px)/(1774 - 1100));
		line-height: calc(20px  + (33 - 20)*(100vw - 1100px)/(1774 - 1100));
	}
	span.cta-card {
		font-size: calc(16px  + (18 - 16)*(100vw - 1100px)/(1774 - 1100));
		line-height: calc(45px  + (82 - 45)*(100vw - 1100px)/(1774 - 1100));
	}
	.row-big-card .cont .card-inner {
		padding-left: calc(40px  + (80 - 40)*(100vw - 1100px)/(1774 - 1100));
		padding-top: calc(20px  + (40 - 20)*(100vw - 1100px)/(1774 - 1100));
	}
	.single-box-inner h4 {
		font-size: calc(20px  + (44 - 20)*(100vw - 960px)/(1774 - 960));
		line-height: calc(26px  + (50 - 26)*(100vw - 960px)/(1774 - 960));
	}
	.inner-hero-edizioni-txt h1 {
		font-size: calc(40px  + (76 - 40)*(100vw - 960px)/(1774 - 960));
		line-height: calc(46px  + (82 - 46)*(100vw - 960px)/(1774 - 960));
	}
}

@media (max-width: 1100px) {
.card-img div {
		padding-bottom: 80%;
	}
	.card-inner h3 {
		font-size: calc(24px  + (40 - 24)*(100vw - 610px)/(1100 - 610));
		line-height: calc(28px  + (50 - 28)*(100vw - 610px)/(1100 - 610));
	}
	.card-inner h4 {
		font-size: calc(16px  + (20 - 16)*(100vw - 610px)/(1100 - 610));
		line-height: calc(20px  + (26 - 20)*(100vw - 610px)/(1100 - 610));
	}
	.card-inner p {
		font-size: calc(13px  + (16 - 13)*(100vw - 610px)/(1100 - 610));
		line-height: calc(16px  + (22 - 16)*(100vw - 610px)/(1100 - 610));
	}
	span.cta-card {
		font-size: calc(15px  + (16 - 15)*(100vw - 610px)/(1100 - 610));
		line-height: calc(34px  + (60 - 34)*(100vw - 610px)/(1100 - 610));
	}
	.row-big-card .cont .card-inner {
		padding-left: 30px;
		padding-top: 20px;
	}
}

@media all and (max-width: 960px) {
	.card-img div {
		padding-bottom: 100%;
	}
@media (max-width: 610px) {
  .card-inner h4 {
    font-size: calc(18px + (24 - 18)*(100vw - 320px)/(610 - 320));
    line-height: calc(22px + (26 - 22)*(100vw - 320px)/(610 - 320));
}
}
  
@media all and (max-width: 768px) {
	.card-img div {
		padding-bottom: 110%;
  }
 }
  
@media all and (max-width: 610px) {
	.row-big-card .cont .card-inner {
	    padding: 0 20px 30px;
	    position: relative;
	    z-index: 3;
	    top: 45%;
	    left: 0;
	    bottom: 0;
	    background: white;
	    width: calc(100% - 40px); 
	}
	.row-big-card .cont .card-img div {
		-webkit-clip-path: polygon(0 0, 100% 0, 100% 100%, 0 92%);
		clip-path: polygon(0 0, 100% 0, 100% 100%, 0 92%);
	}
	.row-big-card .cont:hover .card-img img, .row-big-card .cont:hover .card-img div {
	    -webkit-clip-path: polygon(0 0, 100% 8%, 100% 100%, 0 92%);
		clip-path: polygon(0 0, 100% 8%, 100% 100%, 0 92%);
	}
	.card-img {
		padding-left: 0;

	}
	.card-img div {
		padding-bottom: 64%;
	}
	.card-inner h3 {
		font-size: calc(30px  + (48 - 30)*(100vw - 320px)/(610 - 320));
		line-height: calc(36px  + (66 - 36)*(100vw - 320px)/(610 - 320));
	}
	.card-inner h4 {
		font-size: calc(18px  + (24 - 18)*(100vw - 320px)/(610 - 320));
		line-height: calc(22px  + (26 - 22)*(100vw - 320px)/(610 - 320));
	}
	.card-inner p {
		font-size: calc(14px  + (19 - 14)*(100vw - 320px)/(610 - 320));
		line-height: calc(18px  + (33 - 18)*(100vw - 320px)/(610 - 320));
	}
	span.cta-card {
		font-size: calc(15px  + (18 - 15)*(100vw - 320px)/(610 - 320));
		line-height: calc(34px  + (60 - 34)*(100vw - 320px)/(610 - 320));
	}
 }
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