.book-body {
    background-color: #f0f1f2;
}

.book .book-summary {
    background-color: #323232;
    color: #ddd;
}

.book .book-summary ul.summary li a {
    color: #ddd;
}

p.caption {
  color: #777;
  margin-top: 10px;
}

.note p::before {
    content: "✅ Tip: ";
    font-weight: 800;
}

.note p {
     background-color: #f0f7fb;
     border-left: solid 4px #3498db;
     line-height: 18px;
     overflow: hidden;
     padding: 15px;
}