/**
 * 1. Make the dialog container, and its child overlay spread across
 *    the entire window.
 */
.dialog-container,
.dialog-overlay {
  position: fixed; /* 1 */
  top: 0; /* 1 */
  right: 0; /* 1 */
  bottom: 0; /* 1 */
  left: 0; /* 1 */
}

/**
  * 1. Make sure the dialog container and all its descendants sits on
  *    top of the rest of the page.
  * 2. Make the dialog container a flex container to easily center the
  *    dialog.
  */
.dialog-container {
  z-index: 2; /* 1 */
  display: flex; /* 2 */
}

/**
  * 1. Make sure the dialog container and all its descendants are not
  *    visible and not focusable when it is hidden.
  */
.dialog-container[aria-hidden='true'] {
  display: none; /* 1 */
}

/**
  * 1. Make the overlay look like an overlay.
  */
.dialog-overlay {
  background-color: rgb(43 46 56 / 0.9); /* 1 */
  animation: fade-in 200ms both;
}

/**
  * 1. Vertically and horizontally center the dialog in the page.
  * 2. Make sure the dialog sits on top of the overlay.
  * 3. Make sure the dialog has an opaque background.
  */
.dialog-content {
  margin: auto; /* 1 */
  z-index: 2; /* 2 */
  position: relative; /* 2 */
  background-color: white; /* 3 */

  animation: fade-in 400ms 200ms both, slide-up 400ms 200ms both;
  max-width: 1100px;
  width: calc(100% - 40px);
  border-radius: 5px;
  box-sizing: border-box;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

@keyframes slide-up {
  from {
    transform: translateY(10%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .dialog-overlay,
  .dialog-content {
    animation: none;
  }
}

.dialog-content h1 {
  margin: 0;
  font-size: 1.25em;
}

.dialog-close {
  position: absolute;
  top: -40px;
  right: -10px;
  border: 0;
  padding: 0.25em;
  background-color: transparent;
  font-size: 1.5em;
  width: 1.5em;
  height: 1.5em;
  text-align: center;
  cursor: pointer;
  transition: 0.15s;
  border-radius: 50%;
}

.dialog-close svg {
  vertical-align: top;
}

.dialog-close:hover {
  background-color: rgb(50 50 0 / 0.15);
}