header, #center, .center {
    text-align: center;
}
#right {
    position: fixed;
    right: 5%;
}
#left {
    position: fixed;
    left: 5%;
}
section, article, div {
    width: 50%;
    margin-left: 25%;
}
#bottom {
    position: absolute;
    bottom: 5%;
}
.slider .versions li {
    display: inline-block;
    width: 18%;
  }
  .slider input[type="range"] {
    width: 90%;
  }
  .slider {
    width: 95%;
    margin: 20px 0;
    padding: 20px;
    position: relative;
  }
  #small {
    transform: scale(1.2);
  }
  #validation {
    text-align: center;
}

article > h2 {
  font-size: 1.2em;
  margin: 0 0 15px 0;
  cursor: pointer;
}

article > h2 > img {
  width: 20px;
  margin-right: 20px;
}

.hiddenText {
  margin: 0 0 15px 60px;
  list-style-type:square;
  font-size: 1.1em;
  font-family: "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", "DejaVu Sans", Verdana, "sans-serif";
  line-height: 1.4em;  
  display: none;
}
body > header {
  width: 100%;
  font-size: 48px;
  text-align: center;
  line-height: 1.5em;
  margin-bottom: 0;
}

article {
  width: 80%;
  text-align: center;
  margin: 0 auto;
     padding-bottom: 20px;
}

.answer {
  font-size: 15px;
  font-family: "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", "DejaVu Sans", Verdana, "sans-serif";
  line-height: 1.3;
  margin: 0 0 15px;
}

article > h2 {
  font-size: 20px;
  margin: 0 0 15px 0;
  cursor: pointer;
}
article > h1 {
  font-size: 20px;
  margin: 0 0 15px 0;
  cursor: pointer;
  text-align: center;
}