.md-typeset a[data-plw-concept-ready] {
  text-decoration-line: underline;
  text-decoration-style: dotted;
  text-underline-offset: .2em;
}

.md-typeset a[data-plw-concept-ready]::after {
  content: "\2060ⓘ";
  margin-inline-start: .15em;
  font-size: .7em;
  vertical-align: super;
}

.plw-concept-popover {
  position: fixed;
  inset: auto;
  box-sizing: border-box;
  margin: 0;
  width: min(23rem, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  overflow: auto;
  overscroll-behavior: contain;
  padding: 1rem;
  border: 1px solid var(--md-default-fg-color--lighter, #ccc);
  border-radius: .5rem;
  background: var(--md-default-bg-color, #fff);
  color: var(--md-default-fg-color, #222);
  box-shadow: 0 .25rem 1.5rem #0003;
  font: inherit;
  font-size: .8rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.plw-concept-popover h2 {
  margin: 0;
  padding-inline-end: 3.5rem;
  font-size: 1rem;
  line-height: 1.5;
}

.plw-concept-popover p { margin: .6rem 0; }
.plw-concept-popover .plw-concept-english {
  margin-top: .2rem;
  color: var(--md-default-fg-color--light, #555);
}
.plw-concept-popover a { color: var(--md-typeset-a-color, #3656b3); }
.plw-concept-close {
  position: absolute;
  top: .65rem;
  right: .5rem;
  min-width: 44px;
  min-height: 44px;
  padding: .4rem;
  border: 0;
  border-radius: .25rem;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}
.plw-concept-popover :focus-visible {
  outline: 2px solid var(--md-accent-fg-color, #3656b3);
  outline-offset: 2px;
}

@media print {
  .plw-concept-popover { display: none !important; }
  .md-typeset a[data-plw-concept-ready]::after { content: none; }
}