main section a {

  color: #177ee6;
  text-decoration: none;

}

main section a:visited {

  color: #177ee6;
  text-decoration: none;

}

article div {
  /* background-color: #ff0000; */
  justify-content: center;
  width: 100%;
  /* display: block; */
  display: flex;
  flex-wrap: wrap;
}

article div form {
  /* background-color: #00ff00; */
  display: block;
  /* text-align: center; */
  align-content: center;
  align-items: center;
  /* justify-content: center; */
  /* display: block; */
  /* flex-wrap: wrap; */
  /* for horizontal aligning of child divs */
  justify-content: center;
  /* for vertical aligning */
  /* align-items: center; */
  width: 650px;
}

article div form div {
  /* background-color: #0000ff; */
  /* display:inline-flexbox; */
  /* width: 100%; */
  /* display: block; */
  width: 650px;
  line-height: 30px;
  /* align-items: center; */
  justify-content: center;
  text-align: center;
  align-items: center;
  display: inline-block;

}


article div form div label {
  width: 100px;
  /* display: block; */
}

article div form div input {
  width: 200px;
  /* display: block; */
}


input[type=button] {
  color: #fff;
  background-color: blue;
  height: 30px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

input[type=checkbox] {
  visibility: hidden;
  font-size: 25px;
}

input[type=checkbox]:after,
input[type=checkbox]::after {
  content: " ";
  background-color: blue;
  display: inline-block;
  text-align: center;
  color: #fff;
  height: 30px;
  line-height: 30px;
  width: 30px;
  visibility: visible;
  border-radius: 15px;
}

input[type=checkbox]:checked:after,
input[type=checkbox]:checked::after {
  content: "\2714";
}