style.css

p.caption {
  color: #777;
  margin-top: 10px;
}
p code {
  white-space: inherit;
}
pre {
  word-break: normal;
  word-wrap: normal;
}
pre code {
  white-space: inherit;
}

.exercise {
    padding-left: 2em;
    border: 1px solid;
    border-color: #ffffff;
    /* color: #ffffff; white*/
    color: #696969; /* dark grey*/
    /* background-color: #26a69a; dark teal*/
    background-color: #96D3CE; medium teal
    /* background-color: #D3EDEA; */
    
}

.history {
  padding-left: 2em;
  border: 1px solid;
  border-color: #ffffff;
  color: #696969;
  background-color: #FFD992;
}

/* colors generated w http://paletton.com/#uid=73g0u0k9gMF1u+354U+dHBqiftl */

.question{
  padding-left: 2em;
  border: 1px solid;
  border-color: #ffffff;
  color: #696969;
  background-color: #CDD8EF;
}

.demo{
  padding-left: 2em;
  border: 1px solid;
  border-color: #ffffff;
  color: #696969;
  background-color: #FFACAC;
}

/* "#7B321C" dark red */
/* "#FFACAC" light red */
/*
.blank{
  padding-left: 2em;
  border: 1px solid;
  border-color: #ffffff;
  color: #696969;
  background-color: #;
}
*/
.exercise a {
  color: #ffffff;
  font-weight: bold;
  text-decoration: none;
}

.exercise p code {
  color: inherit;
}

/* -----------Section anchors -------------*/

.book .book-body .page-wrapper .page-inner section.normal {
  overflow: visible !important; /*so anchor link doesnt get cut off */
}

a.anchor {
  margin-left: -30px;
  padding-right: 3px;
  display:inline-block;
  width: 30px;
  height: 30px;
  background-image: url(https://image.flaticon.com/icons/svg/34/34735.svg) !important;
  background-repeat: no-repeat !important;
  background-size: 20px 20px !important;
  background-position: center bottom !important;
  opacity: 0;
}


.hasAnchor:hover a.anchor, a.anchor:hover {
  opacity: 0.6;
}

@media (max-width: 1144px) { /* dont show anchor link on small screens */
  .hasAnchor:hover a.anchor {
visibility: hidden;
  }
}

/* ----------- End Section anchors -------------*/