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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

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HTML

            
              <div class="container">
  <div class="tf"><br><br>TRUE OR FALSE</div>
<center><br><svg width="30" height="30">
  <!--<circle cx="50" cy="50" r="50" />-->
  <path d="M0,15 a1,1 0 0,0 30,0" fill="BLUE" />
</svg>
  <p>Assisted reproductive technologies (like IVF) can help most women have a baby using their own eggs</p>
  
  <div class="active-area">
    

    <div class="question">
      <div class="click-me"><br><br><br>Tap to <br>Reveal the<br> Answer</div>
    </div>
    
    <div class="answer">
      <p>FALSE</p>
      <div class="clearfix">
  <section class="one">
    <span class="dot" style=""></span>Incorrect
    <center><div class="incorrect" style="width:90px;height:90px;"></div>&nbsp;&nbsp;89.3%<br>
  </section>

  <section class="two">Correct
<center><div class="correct" style="width:10px;height:10px;"></div>&nbsp;&nbsp;10.7% 
    <br>  </section>
</div>
      <small>Source: Glamour x Modern Fertility Survey</small>
    </div> 
    
  </div>
</div>
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CSS

            
              @font-face {
  font-family: chalet;
  src: url(https://files.persona.co/31025/Chalet-NewYorkNineteenEighty.woff);
}
@font-face {
  font-family: saol;
  src: url(https://files.persona.co/31025/Saol_Text_Semibold.woff);
}
.clearfix {
  overflow: hidden;
}

.correct{
  background-color :#FF9F34;
  border-radius: 50%;
  display:block;
  margin:10px;
}

.incorrect{
  background-color :#eb0029;
  border-radius: 50%;
  display:block;
    margin:10px;

}
section {
  width: 40%;
  font-weight: bold;
  text-transform: uppercase;
  font-family: 'chalet';
  font-size: 15px;
  letter-spacing:1px;
  padding: 5%;
  text-align: center;
  float: left;
}

.one {
}

.two {
}
.hc{ 
  margin: 0 auto;
  background-color: #FF9F34;
  height: 40px;
  width: 40px;
  border-radius: 50%; 
  animation: pulse 1s ease-in-out infinite alternate;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size:10px;
  text-align:center;
  vertical-align:middle;
  color:#fff;}
@keyframes pulse {
  from {transform: scale(1);}
  to {transform: scale(1.05);}
}

p{
  font-family: saol;
  font-size:30px;
}

.tf {
  /*   Background:#A7E9F2; */
  margin-top:-15px;
  text-align: center;
  padding: 20px;
  font-family: "chalet";
  letter-spacing: 2px;
  font-weight: 600;
  color: #000;
  padding-bottom: 5px;
  background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/2315306/wave-01.svg");
  background-repeat: repeat;
  background-position-x: 0%;
  background-position-y: 0%;
  background-size: 10px auto;
  background-repeat: repeat-x;
  background-size: 17px 10px;
  background-position: 40px 38px;
  animation: move 15s linear infinite;
  -webkit-animation: move 15s linear infinite;
  animation-play-state: paused;
  text-decoration: none;
  background-color: transparent;
  -webkit-text-decoration-skip: objects;
  animation-play-state: running;
}

@-webkit-keyframes move {
  from {
    background-position: 2px 19px;
  }
  to {
    background-position: 500px 19px;
  }
}

@keyframe move {
  from {
    background-position: 2px 19px;
  }
  to {
    background-position: 500px 19px;
  }
}


.container {
  max-width: 400px;
  margin: 0 auto;
}

.click-me {
  margin: 0 auto;
  background-color: #FF9F34;
  height: 100px;
  width: 100px;
  border-radius: 50%; 
  animation: pulse 1s ease-in-out infinite alternate;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size:10px;
  text-align:center;
  vertical-align:middle;
  color:#fff;
}

.active-area {
  position: relative;
  width: 100%;
}

.question {
  opacity: 1;
  cursor: pointer;
  position: absolute;
  z-index: 9;
  width:100%;
  transition: opacity 100ms cubic-bezier(.17,.67,.83,.67);
}

.answer {
  margin-top:-20px;
  user-select: none;
  opacity: 0;
  position: absolute;
  z-index: 8;
  width:100%;
  text-align:center;
  transition: opacity 500ms cubic-bezier(.17,.67,.83,.67);
}


small{
   color:gray;
  font-size:10px;
  text-transform: uppercase;
  letter-spacing:1px;
  font-weight:400;
}
svg {
 transform: rotate(180deg);
 margin-bottom:-25px;
}
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JS

            
              window.addEventListener("load", function() {
  const showButton = document.querySelector(".question");
  const answer = document.querySelector(".answer");

  function showResults() {
    showButton.style.opacity = 0;
    answer.style.opacity = 1;
  }

  showButton.addEventListener("click", showResults);
})
!
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