<div class="c-share">
  <input class="c-share__input" type="checkbox" id="checkbox">
  <label class="c-share__toggler" for="checkbox">
            <span class="c-share__icon"></span>
        </label>

  <ul class="c-share_options" data-title="Share">
    <li>Facebook</li>
    <li>Twitter</li>
    <li>Google</li>
    <li>Email</li>
  </ul>
</div>

$azure-radiance: #029dfc;
$black: #000000;
$concrete: #f2f2f2;
$malibu: #639eff;
$tundora: #464646;

.c-share {
  position: relative;
  width: 3.4375em;
  height: 3.4375em;
}

.c-share__input {
  display: none;

  &:checked ~  {
    .c-share__toggler .c-share__icon {
      transition: 0s;
      width: 0;
      height: 0;
      color: $malibu;

      &::before {
        transform: rotate(-45deg);
      }

      &::after {
        transform: rotate(45deg);
      }
    }

    .c-share_options {
      width: 11.0625em;
      height: 12.5em;
      border-radius: 0.3125em;

      &::before,
      li {
        transition: 0.3s 0.15s;
        opacity: 1;
        transform: translateY(0);
      }
    }
  }
}

.c-share__toggler,
.c-share_options {
  position: absolute;
  right: 0;
  width: inherit;
  height: inherit;
  border-radius: 50%;
  background-color: $concrete;
}

.c-share__toggler {
  cursor: pointer;
  z-index: 1;

  display: flex;
  justify-content: center;
  align-items: center;
}

.c-share__icon {
  position: relative;
  left: -0.3125em;
  width: 0.5em;
  height: 0.5em;
  border-radius: 50%;
  color: $azure-radiance;
  background-color: currentColor;
  box-shadow: 0.625em -0.625em, 0.625em 0.625em;
  transition: 0.1s 0.05s;

  &::before,
  &::after {
    content: "";
    position: absolute;
    width: 1em;
    height: 0.125em;
    background-color: currentColor;
    transition: 0.1s;
  }

  &::before {
    top: 0.1875em;
    left: 0.1875em;
    transform-origin: bottom left;
    transform: rotate(45deg);
  }

  &::after {
    top: -0.125em;
    left: 0.03125em;
    transform-origin: center;
    transform: rotate(-45deg);
  }
}

.c-share_options {
  list-style: none;
  margin: 0;
  padding: 1.0625em 1.25em;
  box-sizing: border-box;
  overflow: hidden;
  transition: 0.2s;
  box-shadow: 0 0.125em 0.125em rgba($black, 0.3);

  &::before {
    content: attr(data-title);
    display: block;
    margin-bottom: 1.25em;
    font-weight: 700;
  }

  li {
    font-size: 0.875em;
    color: $tundora;
    cursor: pointer;

    &:not(:last-child) {
      margin-bottom: 0.75em;
    }
  }

  &::before,
  li {
    opacity: 0;
    transform: translateY(0.625em);
    transition: 0s;
  }
}

body {
  font-family: "Roboto", sans-serif;
  background-color: $malibu;
  margin: 0;
  display: grid;
  height: 100vh;
  margin: 0;
  place-items: center center;
}

/* ¯\_(ツ)_/¯ */