style.css

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

.tips {
  padding: 1em 1em 1em 4em;
  margin-bottom: 10px;
  margin-left: 40px;
  border-radius: 10px;
  background: #fefefe 5px center/3em no-repeat;
  background-position: 5px 10px;
  position: relative;
}

.tipsp {
  padding: 1em 1em 1em 4em;
  margin-bottom: 10px;
  margin-left: 40px;
  border-radius: 10px;
  background: #fefefe 5px center/3em no-repeat;
  background-position: 5px 10px;
  position: relative;
}

.r {
  border: 2px solid #2369bd;
  background-image: url("images/r.png");
  position: relative;
  z-index: 1;
}
.python {
  background-repeat: no-repeat;
  border: 2px solid #ffde4d;
  background-image: url("images/p.png");
  position: relative;
  z-index: 1;
}

/*---------------Hero Image------------------*/

/* next 3 rules are for setting large image at top of each page and pushing down the book content to appear beneath the image */

.hero-image-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 390px;
  /*background-image: url("images/books.jpg");*/
  background-color: #3fb5bd;
}

.hero-image {
  width: 100%;
  height: 390px;
  object-fit: cover;
}

.page-inner {
  padding-top: 440px !important;
}


/*--- LOGO ---*/

.toc-logo {
  width: 200px !important;
  object-fit: contain;
  margin: 0 auto;
}

.toc-logo img {
  max-width: 100%;
  margin-bottom: 10px;
}

.summary > li:first-child {
  height: auto !important; 
}