.controller-projects.action-index a.collapsible {
    background: none;
}
.controller-projects.action-index .collapsible:after {
  content: '\02795'; /* Unicode character for "plus" sign (+) */
}

.controller-projects.action-index .active:after {
  content: "\2796"; /* Unicode character for "minus" sign (-) */
}
/* Add a background color to the button if it is clicked on (add the .active class with JS), and when you move the mouse over it (hover) */
.controller-projects.action-index .active, .collapsible:hover {
  background-color: none;
}
.controller-projects.action-index #projects-index ul.projects li.root {
  page-break-inside: avoid;
  word-break: break-word;
}

.controller-projects.action-index #projects-index ul.projects li.child {
  margin-top: 1em;
  word-break: break-word; 
}