tabs using html and css only code example

Example 1: tabs css only

.label {
  width: 100%;
  padding: 20px 30px;
  background: #e5e5e5;
  cursor: pointer;
  font-weight: bold;
  font-size: 18px;
  color: #7f7f7f;
  transition: background 0.1s, color 0.1s;
}

.label:hover {
  background: #d8d8d8;
}

.label:active {
  background: #ccc;
}

.input:focus + .label {
  box-shadow: inset 0px 0px 0px 3px #2aa1c0;
  z-index: 1;
}

.input:checked + .label {
  background: #fff;
  color: #000;
}

@media (min-width: 600px) {
  .label {
    width: auto;
  }
}

Example 2: tabs css only

* {
  box-sizing: border-box;
}

body {
  padding: 10px;
  background: #f2f2f2;
}

Example 3: tabs css only

<div class="tabs">
  <input name="tabs" type="radio" id="tab-1" checked="checked" class="input"/>
  <label for="tab-1" class="label">Orange</label>
  <div class="panel">
    <h1>Orange</h1>
    <p>The orange (specifically, the sweet orange) is the fruit of the citrus species Citrus × sinensis in the family Rutaceae</p>
    <p>The fruit of the Citrus × sinensis is considered a sweet orange, whereas the fruit of the Citrus × aurantium is considered a bitter orange. The sweet orange reproduces asexually (apomixis through nucellar embryony); varieties of sweet orange arise through mutations.</p>
  </div>

  <input name="tabs" type="radio" id="tab-2" class="input"/>
  <label for="tab-2" class="label">Tangerine</label>
  <div class="panel">
    <h1>Tangerine</h1>
    <p>The tangerine (Citrus tangerina) is an orange-colored citrus fruit that is closely related to, or possibly a type of, mandarin orange (Citrus reticulata).</p>
    <p>The name was first used for fruit coming from Tangier, Morocco, described as a mandarin variety. Under the Tanaka classification system, Citrus tangerina is considered a separate species.</p>
  </div>

  <input name="tabs" type="radio" id="tab-3" class="input"/>
  <label for="tab-3" class="label">Clemantine</label>
  <div class="panel">
    <h1>Clemantine</h1>
    <p>A clementine (Citrus ×clementina) is a hybrid between a mandarin orange and a sweet orange, so named in 1902. The exterior is a deep orange colour with a smooth, glossy appearance. Clementines can be separated into 7 to 14 segments. Similarly to tangerines, they tend to be easy to peel.</p>
  </div>
</div>