Responsive Pure CSS Tabs

Source: http://webdesignerhut.com/create-pure-css-tabs/

HTML

<div class="tabs">
    <!-- Radio button and lable for #tab-content1 -->
    <input type="radio" name="tabs" id="tab1" checked >
    <label for="tab1">
        <i class="fa fa-html5"></i><span>HTML5</span>
    </label>
    <!-- Radio button and lable for #tab-content2 -->
    <input type="radio" name="tabs" id="tab2">
    <label for="tab2">
        <i class="fa fa-css3"></i><span>CSS3</span>
    </label>
    <!-- Radio button and lable for #tab-content3 -->
    <input type="radio" name="tabs" id="tab3">
    <label for="tab3">
        <i class="fa fa-code"></i><span>jQuery</span>
    </label>
    <div id="tab-content1" class="tab-content">
        <h3>#1 Tab title here</h3>
        <p>#1 Tab content here</p>
    </div> <!-- #tab-content1 -->
    <div id="tab-content2" class="tab-content">
        <h3>#2 Tab title here</h3>
        <p>#2 Tab content here<br>Lorem Ipsum</p>
    </div> <!-- #tab-content2 -->
   
</div>

CSS

.tabs {
    max-width: 90%;
    float: none;
    list-style: none;
    padding: 0;
    margin: 75px auto;
    border-bottom: 4px solid #ccc;
}
.tabs:after {
    content: '';
    display: table;
    clear: both;
}
.tabs input[type=radio] {
    display:none;
}
.tabs label {
    display: block;
    float: left;
    width: 33.3333%;
    color: #ccc;
    font-size: 30px;
    font-weight: normal;
    text-decoration: none;
    text-align: center;
    line-height: 2;
    cursor: pointer;
    box-shadow: inset 0 4px #ccc;
    border-bottom: 4px solid #ccc;
}
/*
.tabs label span {
    display: none;
}
*/
.tabs label i {
    padding: 5px;
    margin-right: 0;
}
.tabs label:hover {
    color: #3498db;
    box-shadow: inset 0 4px #3498db;
    border-bottom: 4px solid #3498db;
}
.tab-content {
    display: none;
    width: 100%;
    float: left;
    padding: 15px;
    box-sizing: border-box;
    background-color:#ffffff;
}

.tab-content * {
    -webkit-animation: scale 0.7s ease-in-out;
    -moz-animation: scale 0.7s ease-in-out;
    animation: scale 0.7s ease-in-out;
}
/*
.tabs label {
    -webkit-transition: all 0.5s;
    transition: all 0.5s;
}
@keyframes scale {
  0% {
    transform: scale(0.9);
    opacity: 0;
    }
  50% {
    transform: scale(1.01);
    opacity: 0.5;
    }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}
*/
.tabs [id^="tab"]:checked + label {
    background: #FFF;
    box-shadow: inset 0 4px #3498db;
    border-bottom: 4px solid #3498db;
    color: #3498db;
}
#tab1:checked ~ #tab-content1,
#tab2:checked ~ #tab-content2,


@media (min-width: 768px) {
    .tabs i {
        padding: 5px;
        margin-right: 10px;
    }
    .tabs label span {
        display: inline-block;
    }
    .tabs {
    max-width: 750px;
    margin: 50px auto;
    }
}