.breadcrumb {
  margin: 1.3rem 0 0 0;
  color: #666;
}
.note-subjects {
  list-style: none;
}
.note-count {
  color: #666;
  margin-left: 0.5em;
}
.note .content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1em auto;
}
.note .content table {
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
}
.note .content th, .note .content td {
  border: 1px solid #ccc;
  padding: 4px 8px;
}
.katex-display {
  overflow-x: auto;
  overflow-y: hidden;
}
mark {
  background-color: #fff3a3;
}
.callout {
  border-left: 4px solid #5b8def;
  background: #f4f7fd;
  padding: 0.5em 1em;
  margin: 1em 0;
}
.callout-title {
  font-weight: bold;
  margin: 0;
}
.callout-warning, .callout-danger {
  border-left-color: #e0564b;
  background: #fdf3f2;
}
.missing-note {
  color: #888;
  border-bottom: 1px dashed #aaa;
}
.note-embed {
  display: inline-block;
  margin: 0.5em 0;
}
.note-nav {
  display: flex;
  justify-content: space-between;
  gap: 1em;
  margin-top: 2em;
  padding-top: 1em;
  border-top: 1px solid #ddd;
}
.note-nav .next {
  margin-left: auto;
  text-align: right;
}