@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700);

body {
  font-family: "Open Sans", Arial;
  background: #CCC;
}

h2 {
  text-align: center;
}
p {
  font-size: 13px;
}
#input {
  display: none;
  visibility: hidden;
}

label {
  display: block;
  padding: 0.5em;
  text-align: center;
  border-bottom: 1px solid #CCC;
  color: #666;
}
label:hover {
  color: #000;
}
label::before {
  font-family: Consolas, monaco, monospace;
  font-weight: bold;
  font-size: 15px;
  content: "+";
  vertical-align: text-top;
  display: inline-block;
  width: 20px;
  height: 20px;
  margin-right: 3px;
  background: radial-gradient(ellipse at center, #CCC 50%, transparent 50%);
}
#expand {
  height: 0px;
  overflow: hidden;
  transition: auto 1s;
  background: #f4f4f4;
  word-wrap: break-word;
  margin-left: 170px;
  margin-right: 170px;
  color: #FFF;
}
section {
  padding: 0 20px;
}
#toggle:checked ~ #expand {
  height: auto;

}
#toggle:checked ~ label::before {
  content: "-";
}

@media only screen and (max-width: 750px) {

  #expand {
    height: 0px;
    overflow: hidden;
    transition: height 0.5s;
    background: #f4f4f4;
    margin-left: 20px;
    margin-right: 20px;
    word-wrap: break-word;
    color: #FFF;
  }

}