Pure CSS Tabs Component with Transitions Between Variable Heights

Preview:

Description:

A tabs component built using CSS  / CSS3 and radio input hack that features transitioning between variable heights.

How to use it:

Create radio button based tabs and tabbed content as follow.

<div class="tab-wrap">
  <input type="radio" id="tab1" name="tabGroup1" class="tab" checked>
  <label for="tab1">Section One</label>
  <input type="radio" id="tab2" name="tabGroup1" class="tab">
  <label for="tab2">Section Two</label>
  <input type="radio" id="tab3" name="tabGroup1" class="tab">
  <label for="tab3">Section Three</label>
  <div class="tab-content">
    <h3>Section One</h3>
    <p>...</p>
  </div>
  <div class="tab-content">
    <h3>Section Two</h3>
    <p>...</p>
  </div>
  <div class="tab-content">
    <h3>Section Three</h3>
    <p>...</p>
  </div>
</div>

The basic CSS to style the tabs component.

.tab-wrap {
  -webkit-transition: 0.3s box-shadow ease;
  transition: 0.3s box-shadow ease;
  border-radius: 6px;
  max-width: 100%;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  position: relative;
  list-style: none;
  background-color: #fff;
  margin: 40px 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}
.tab-wrap:hover { box-shadow: 0 12px 23px rgba(0, 0, 0, 0.23), 0 10px 10px rgba(0, 0, 0, 0.19); }
.tab { display: none; }

The radio button + button trick to switch between tabbed content.

.tab:checked:nth-of-type(1) ~ .tab-content:nth-of-type(1) {
  opacity: 1;
  -webkit-transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
  transition: 0.5s opacity ease-in, 0.8s transform ease;
  position: relative;
  top: 0;
  z-index: 100;
  -webkit-transform: translateY(0px);
  -ms-transform: translateY(0px);
  transform: translateY(0px);
  text-shadow: 0 0 0;
}
.tab:checked:nth-of-type(2) ~ .tab-content:nth-of-type(2) {
  opacity: 1;
  -webkit-transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
  transition: 0.5s opacity ease-in, 0.8s transform ease;
  position: relative;
  top: 0;
  z-index: 100;
  -webkit-transform: translateY(0px);
  -ms-transform: translateY(0px);
  transform: translateY(0px);
  text-shadow: 0 0 0;
}
.tab:checked:nth-of-type(3) ~ .tab-content:nth-of-type(3) {
  opacity: 1;
  -webkit-transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
  transition: 0.5s opacity ease-in, 0.8s transform ease;
  position: relative;
  top: 0;
  z-index: 100;
  -webkit-transform: translateY(0px);
  -ms-transform: translateY(0px);
  transform: translateY(0px);
  text-shadow: 0 0 0;
}
.tab:checked:nth-of-type(4) ~ .tab-content:nth-of-type(4) {
  opacity: 1;
  -webkit-transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
  transition: 0.5s opacity ease-in, 0.8s transform ease;
  position: relative;
  top: 0;
  z-index: 100;
  -webkit-transform: translateY(0px);
  -ms-transform: translateY(0px);
  transform: translateY(0px);
  text-shadow: 0 0 0;
}
.tab:checked:nth-of-type(5) ~ .tab-content:nth-of-type(5) {
  opacity: 1;
  -webkit-transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
  transition: 0.5s opacity ease-in, 0.8s transform ease;
  position: relative;
  top: 0;
  z-index: 100;
  -webkit-transform: translateY(0px);
  -ms-transform: translateY(0px);
  transform: translateY(0px);
  text-shadow: 0 0 0;
}
.tab:first-of-type:not(:last-of-type) + label {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}
.tab:not(:first-of-type):not(:last-of-type) + label { border-radius: 0; }
.tab:last-of-type:not(:first-of-type) + label {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}
.tab:checked + label {
  background-color: #fff;
  box-shadow: 0 -1px 0 #fff inset;
  cursor: default;
}
.tab:checked + label:hover {
  box-shadow: 0 -1px 0 #fff inset;
  background-color: #fff;
}
.tab + label {
  box-shadow: 0 -1px 0 #eee inset;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  display: block;
  text-decoration: none;
  color: #333;
  -webkit-box-flex: 3;
  -webkit-flex-grow: 3;
  -ms-flex-positive: 3;
  flex-grow: 3;
  text-align: center;
  background-color: #f2f2f2;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  text-align: center;
  -webkit-transition: 0.3s background-color ease, 0.3s box-shadow ease;
  transition: 0.3s background-color ease, 0.3s box-shadow ease;
  height: 50px;
  box-sizing: border-box;
  padding: 15px;
}
.tab + label:hover {
  background-color: #f9f9f9;
  box-shadow: 0 1px 0 #f4f4f4 inset;
}
.tab-content {
  padding: 10px 25px;
  background-color: transparent;
  position: absolute;
  width: 100%;
  z-index: -1;
  opacity: 0;
  left: 0;
  -webkit-transform: translateY(-3px);
  -ms-transform: translateY(-3px);
  transform: translateY(-3px);
  border-radius: 6px;
}