message

*, *:before, *:after {
  box-sizing: border-box;
}

body {
  height: 100vh;
  background: #ccc;
  overflow: hidden;
}

.modal-container {
  margin: 60px auto;
  padding-top: 0px;
  position: relative;
  width: 160px;
}
.modal-container .modal-btn {
  display: block;
  margin: 0 auto;
  color: #fff;
  width: 160px;
  height: 50px;
  line-height: 50px;
  background: #446CB3;
  font-size: 22px;
  border: 0;
  border-radius: 3px;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 5px 5px -5px #333;
  transition: background 0.3s ease-in;
}
.modal-container .modal-btn:hover {
  background: #365690;
}
.modal-container .modal-content,
.modal-container .modal-backdrop {
  height: 0;
  width: 0;
  opacity: 0;
  visibility: hidden;
  overflow: hidden;
  cursor: pointer;
  transition: opacity 0.2s ease-in;
}
.modal-container .modal-close {
  color: #aaa;
  position: absolute;
  right: 5px;
  top: 5px;
  padding-top: 3px;
  background: #fff;
  font-size: 16px;
  width: 25px;
  height: 25px;
  font-weight: bold;
  text-align: center;
  cursor: pointer;
}
.modal-container .modal-close:hover {
  color: #333;
}
.modal-container .modal-content-btn {
  position: absolute;
  text-align: center;
  cursor: pointer;
  bottom: 20px;
  right: 30px;
  background: #446CB3;
  color: #fff;
  width: 50px;
  border-radius: 2px;
  font-size: 14px;
  height: 32px;
  padding-top: 9px;
  font-weight: normal;
}
.modal-container .modal-content-btn:hover {
  color: #fff;
  background: #365690;
}
.modal-container #modal-toggle {
  display: none;
}
.modal-container #modal-toggle.active ~ .modal-backdrop, .modal-container #modal-toggle:checked ~ .modal-backdrop {
  background-color: rgba(0, 0, 0, 0.6);
  width: 100vw;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 9;
  visibility: visible;
  opacity: 1;
  transition: opacity 0.2s ease-in;
}
.modal-container #modal-toggle.active ~ .modal-content, .modal-container #modal-toggle:checked ~ .modal-content {
  opacity: 1;
  background-color: #fff;
  max-width: 400px;
  width: 400px;
  height: 280px;
  padding: 10px 30px;
  position: fixed;
  left: calc(50% - 200px);
  top: 12%;
  border-radius: 4px;
  z-index: 999;
  pointer-events: auto;
  cursor: auto;
  visibility: visible;
  box-shadow: 0 3px 7px rgba(0, 0, 0, 0.6);
}
@media (max-width: 400px) {
  .modal-container #modal-toggle.active ~ .modal-content, .modal-container #modal-toggle:checked ~ .modal-content {
    left: 0;
  }
}

​​// Optional jQuery class toggle for added robustness.

/*
var labelID;

$('label').click(function() {
  labelID = $(this).attr('for');
  $('#' + labelID).toggleClass('active');
});
*/