Pure CSS Accordion

  <h1>Pure CSS Accordion <sup>2.0</sup></h1>
  <div class="row">
    <div class="col">
      <h2>Open <b>multiple</b></h2>
      <div class="tabs">
        <div class="tab">
          <input type="checkbox" id="chck1">
          <label class="tab-label" for="chck1">Item 1</label>
          <div class="tab-content">
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsum, reiciendis!
          </div>
        </div>
        <div class="tab">
          <input type="checkbox" id="chck2">
          <label class="tab-label" for="chck2">Item 2</label>
          <div class="tab-content">
            Lorem ipsum dolor sit amet consectetur adipisicing elit. A, in!
          </div>
        </div>
      </div>
    </div>
    <div class="col">
      <h2>Open <b>one</b></h2>
      <div class="tabs">
        <div class="tab">
          <input type="radio" id="rd1" name="rd">
          <label class="tab-label" for="rd1">Item 1</label>
          <div class="tab-content">
            Lorem, ipsum dolor sit amet consectetur adipisicing elit. Eos, facilis.
          </div>
        </div>
        <div class="tab">
          <input type="radio" id="rd2" name="rd">
          <label class="tab-label" for="rd2">Item 2</label>
          <div class="tab-content">
            Lorem ipsum dolor, sit amet consectetur adipisicing elit. Nihil, aut.
          </div>
        </div>
        <div class="tab">
          <input type="radio" id="rd3" name="rd">
          <label for="rd3" class="tab-close">Close &times;</label>
        </div>
      </div>
    </div>
  </div>

@charset "UTF-8";
body {
  color: #2c3e50;
  background: #ecf0f1;
  padding: 0 1em 1em;
}

h1 {
  margin: 0;
  line-height: 2;
  text-align: center;
}

h2 {
  margin: 0 0 0.5em;
  font-weight: normal;
}

input {
  position: absolute;
  opacity: 0;
  z-index: -1;
}

.row {
  display: flex;
}
.row .col {
  flex: 1;
}
.row .col:last-child {
  margin-left: 1em;
}

/* Accordion styles */
.tabs {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 4px -2px rgba(0, 0, 0, 0.5);
}

.tab {
  width: 100%;
  color: white;
  overflow: hidden;
}
.tab-label {
  display: flex;
  justify-content: space-between;
  padding: 1em;
  background: #2c3e50;
  font-weight: bold;
  cursor: pointer;
  /* Icon */
}
.tab-label:hover {
  background: #1a252f;
}
.tab-label::after {
  content: "❯";
  width: 1em;
  height: 1em;
  text-align: center;
  transition: all 0.35s;
}
.tab-content {
  max-height: 0;
  padding: 0 1em;
  color: #2c3e50;
  background: white;
  transition: all 0.35s;
}
.tab-close {
  display: flex;
  justify-content: flex-end;
  padding: 1em;
  font-size: 0.75em;
  background: #2c3e50;
  cursor: pointer;
}
.tab-close:hover {
  background: #1a252f;
}

input:checked + .tab-label {
  background: #1a252f;
}
input:checked + .tab-label::after {
  transform: rotate(90deg);
}
input:checked ~ .tab-content {
  max-height: 100vh;
  padding: 1em;
}