Differences From Artifact [ea9429d5b6]:

• File src/default_css.txt — part of check-in [1006de1e66] at 2020-04-08 14:07:00 on branch accordion-experiments-2 — Use dynamically created foreground image elements instead of CSS background images to indicate the status and available actions for the accordion, so they are visible by default for printouts and PDFs, invisible for noscript clients, and enhance compatibility with most skins (Xekri's "justify-content: space-around;" is crunchy, however). (user: florian size: 15570)

To Artifact [5c6cf2bfa5]:

• File src/default_css.txt — part of check-in [343f31f9bf] at 2020-04-08 14:17:00 on branch accordion-experiments-2 — Fix a minor glitch. (user: florian size: 15573)

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  cursor: pointer;
}
.accordion_btn {
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-right: .5em;
  vertical-align: top;
}
// Note: the order of the next 3 entries should be
// maintained for the hierarchical cascade to work.
.accordion > .accordion_btn_plus {
  display: none;
}
.accordion_closed > .accordion_btn_minus {

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  cursor: pointer;
}
.accordion_btn {
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-right: .5em;
  vertical-align: middle;
}
// Note: the order of the next 3 entries should be
// maintained for the hierarchical cascade to work.
.accordion > .accordion_btn_plus {
  display: none;
}
.accordion_closed > .accordion_btn_minus {