<label class="accordion-wrapper">
  <input type="checkbox" class="accordion" hidden />
  <div class="title">
    <strong>Pure CSS Accordion</strong>
    <svg viewBox="0 0 256 512" width="12" title="angle-right" class="side-icon" fill="white">
      <path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" />
    </svg>
    <svg viewBox="0 0 320 512" height="24" title="angle-down" class="down-icon" fill="white">
      <path d="M143 352.3L7 216.3c-9.4-9.4-9.4-24.6 0-33.9l22.6-22.6c9.4-9.4 24.6-9.4 33.9 0l96.4 96.4 96.4-96.4c9.4-9.4 24.6-9.4 33.9 0l22.6 22.6c9.4 9.4 9.4 24.6 0 33.9l-136 136c-9.2 9.4-24.4 9.4-33.8 0z" />
    </svg>
  </div>
  <div class="content">
    <p>Content</p>
  </div>
</label>
<label class="accordion-wrapper">
  <input type="checkbox" class="accordion" hidden />
  <div class="title">
    <strong>Accordion 2</strong>
    <svg viewBox="0 0 256 512" width="12" title="angle-right" class="side-icon" fill="white">
      <path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" />
    </svg>
    <svg viewBox="0 0 320 512" height="24" title="angle-down" class="down-icon" fill="white">
      <path d="M143 352.3L7 216.3c-9.4-9.4-9.4-24.6 0-33.9l22.6-22.6c9.4-9.4 24.6-9.4 33.9 0l96.4 96.4 96.4-96.4c9.4-9.4 24.6-9.4 33.9 0l22.6 22.6c9.4 9.4 9.4 24.6 0 33.9l-136 136c-9.2 9.4-24.4 9.4-33.8 0z" />
    </svg>
  </div>
  <div class="content">
    <p>Content 2</p>
  </div>
</label>
<label class="accordion-wrapper">
  <input type="checkbox" class="accordion" hidden />
  <div class="title">
    <strong>Accordion 3</strong>
    <svg viewBox="0 0 256 512" width="12" title="angle-right" class="side-icon" fill="white">
      <path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" />
    </svg>
    <svg viewBox="0 0 320 512" height="24" title="angle-down" class="down-icon" fill="white">
      <path d="M143 352.3L7 216.3c-9.4-9.4-9.4-24.6 0-33.9l22.6-22.6c9.4-9.4 24.6-9.4 33.9 0l96.4 96.4 96.4-96.4c9.4-9.4 24.6-9.4 33.9 0l22.6 22.6c9.4 9.4 9.4 24.6 0 33.9l-136 136c-9.2 9.4-24.4 9.4-33.8 0z" />
    </svg>
  </div>
  <div class="content">
    <p>Content 3</p>
  </div>
</label>

@import url("https://fonts.googleapis.com/css?family=Roboto:400,400i,700");

* {
  margin: 0;
  font-family: Roboto, sans-serif;
}

body {
  padding: 24px;
}

.accordion-wrapper {
  display: block;
  box-shadow: 0px 2px 4px 0px rgba(0,0,0,0.2);
  max-width: 500px;
  margin: 0 auto;
  margin-top: 12px;
  margin-bottom: 12px;
}

.accordion + .title {
  user-select: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px;
  background: #1565C0;
}

.accordion ~ .title strong {
  line-height: 24px;
  color: white;
}

.accordion ~ .title .side-icon {
  display: block;
}

.accordion:checked ~ .title .side-icon {
  display: none;
}

.accordion ~ .title .down-icon {
  display: none;
}

.accordion:checked ~ .title .down-icon {
  display: block;
}

.accordion ~ .content {
  display: none;
  padding: 8px;
  cursor: pointer;
}

.accordion:checked ~ .content {
  display: block;
}