* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial;
  font-size: 17px;
  background-color: rgb(20, 20, 20);
}

.content-three{
  background-color: rgb(20, 20, 20);
  text-align: center;
  height: auto;
}

.portada{
  margin-top: 50px;
  background-color: red;
  width: 305px;
  height: 429px;
  margin-left: 20px;
  display: inline-block;
  vertical-align: top;
  border: 3px solid rgb(156, 156, 155) ;
  margin-bottom: 30px;
}

.descarga-revista{
  position: relative;
  margin-top: 10px;
  width: auto;
  height: 70px;
  background-color: none;
}


.myBtnStore {
  width: 200px;
  font-size: 18px;
  padding: 10px;
  border: none;
  background: #e82127;
  color: white;
  cursor: pointer;
}

.myBtnStore:hover {
  background: #fff;
  color: black;
}


.label-form{
  width: 70px;
  background-color: none;
}


/*Footer*/
.footer {
  background: black;
  color: #f1f1f1;
  height: 70px;
  width: 100%;
  padding: 20px;
  text-align: center;
  font-size: 16px;
}