<div class="container">
  <input type="checkbox" id="toggle" checked/>
  <label class="button" for="toggle"></label>
  <nav class="nav">
    <ul>
      <a href="http://sashatran.com" target="_blank">About</a>
      <a href="https://codepen.io/sashatran/pens/public/" target="_blank">Home</a>
      <a href="https://www.linkedin.com/in/sasha-tran-23498989/" target="_blank">Hire Me</a>
      <a href="https://www.youtube.com/channel/UCCATAa8MWoBuH-sR_Jlx29A" target="_blank">Subscribe</a>
    </ul>
  </nav>
</div>
@import url("https://fonts.googleapis.com/css?family=Roboto");


$purple: #8974FB;
$light-purple: #C784DD;

body {
  background: #fafafa;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.container {
  width: 20%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

#toggle {
  -webkit-appearance: none;
}

.button {
  position: absolute;
  z-index: 999;
  width: 43px;
  height: 43px;
  background: $purple;
  border-radius: 100%;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  top: -12px;

  &:before {
    position: absolute;
    content: "";
    width: 20px;
    height: 2px;
    background: #fff;
    transform: rotate(90deg);
    transition: all 0.4s ease;
  }
  &:after {
    position: absolute;
    content: "";
    width: 20px;
    height: 2px;
    background: #fff;
    transition: all 0.4s ease;
  }
}

.nav {
  opacity: 0;
  transition: all 0.4s ease-in-out;
  background: #fff;
  width: 100%;
  border-radius: 5px;
  transform: translateY(0%);
  box-shadow: 2px 3px 10px 0 rgba(81, 81, 81, 0.1);
  border: 1px solid #e4e4e4;
  padding: 10px;

  ul {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
  }

  a {
    text-align: center;
    margin: 20px 0;
    color: $purple;
    text-decoration: none;
    font-family: "Roboto", sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 14px;
    
    &:hover {
      color: $light-purple;
    }
  }
}

#toggle:checked ~ .nav {
  opacity: 1;
  transform: translateY(10%);
}

#toggle:checked ~ .button:before {
  transform: rotate(225deg);
}

#toggle:checked ~ .button:after {
  transform: rotate(135deg);
}

@media (max-width: 640px) {
  .container {
    width: 100%;
  }
}
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