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              <button class="toggle-button" id="centered-toggle-button">Toggle</button>

<div class="modal" id="modal">
  <h2>Modal Window</h2>
  <div class="content">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nobis deserunt corrupti, ut fugit magni qui quasi nisi amet repellendus non fuga omnis a sed impedit explicabo accusantium nihil doloremque consequuntur.</div>
  <div class="actions">
    <button class="toggle-button">OK</button>
              html, body {
  height: 100%;
body {
  background: #eee;
  display: flex;
  justify-content: center;
  align-items: center;

.modal {
  width: 500px;
  background: white;
  border: 1px solid #ccc;
  transition: 1.1s ease-out;
    -2rem 2rem 2rem rgba(black, 0.2);
  filter: blur(0);
  transform: scale(1);  
  opacity: 1;
  visibility: visible;
  &.off {
    opacity: 0;
    visibility: hidden;
    filter: blur(8px);
    transform: scale(0.33);
    box-shadow: 1rem 0 0 rgba(black, 0.2);
  @supports (offset-rotation: 0deg) {
    offset-rotation: 0deg;
    offset-path: path("M 250,100 S -300,500 -700,-200");
    &.off {
      offset-distance: 100%;
  @media (prefers-reduced-motion) {
    offset-path: none;
  h2 {
    border-bottom: 1px solid #ccc;
    padding: 1rem;
    margin: 0;
  .content {
    padding: 1rem;
  .actions {
    border-top: 1px solid #ccc;
    background: #eee;
    padding: 0.5rem 1rem;
    button {
      border: 0;
      background: #78f89f;
      border-radius: 5px;
      padding: 0.5rem 1rem;
      font-size: 0.8rem;
      line-height: 1;

#centered-toggle-button {
  position: absolute;

              var buttons = document.querySelectorAll(".toggle-button");
var modal = document.querySelector("#modal");

[].forEach.call(buttons, function(button) {
  button.addEventListener("click", function() {
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