.container {
  max-width: 680px;
  margin: 0 auto;
}
.toggleInner {
  background-color: #eee;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  padding: 40px;
  position: relative;
  width: 100%;
  height: 100%;
}
.toggle {
  pointer-events: none;
  position: absolute;
  top: -20px;
  left: 0px;
}

.toggleBtn:before {
  display: inline-block;
  text-align: center;
  content: "+";
  width: 35px;
  height: 35px;
}
.toggleInput {
  visibility: hidden;
}
.toggleInput[type="checkbox"]:checked ~ .toggleBtn:before {
  display: inline-block;
  text-align: center;
  content: "-";
  width: 35px;
  height: 35px;    
}
.toggleOpen {
  display: none;
}
.toggleClick {
  cursor: pointer;
}