input[id^="spoiler"]{
 display: none;
}
input[id^="spoiler"] + label { /*altered for small device*/
  display: block;
  width: 100%;
  margin: 0 auto;
  padding: 5px 20px;
  background: #2d11ee;/*#e1a;#1191ee*/
  color: #fff;
  text-align: center;
  font-size: 24px;
  border-radius: 8px;
  cursor: pointer;
  transition: all .6s;
}
input[id^="spoiler"]:checked + label {
  color: #333;
  background: #ccc;
}
input[id^="spoiler"] ~ .spoiler {
  width: 100%;
  height: 0;
  padding-left: 20px;
  overflow: hidden;
  opacity: 0;
  margin: 2px ; /*10 px*/
  margin-bottom: 10px;
  padding: 4px; /*10 px*/
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 8px;
  transition: all .6s;
}
input[id^="spoiler"]:checked + label + .spoiler{
  height: auto;
  opacity: 1;
  padding: 10px;
  padding-left: 5%;
}

/*media query added*/
@media (max-width:720px){
	input[id^="spoiler"] + label {
      font-size: 18px;
  }
  input[id^="spoiler"] ~ .spoiler {
    margin-bottom: 5px;
  }
}