.main-content {
    max-width: 900px;
}

.toc-container {
    max-width: 400px;
}

.toc {
    position: sticky;
    top: 20px;
    overflow-y: auto;
    padding: 10px;
    max-height: calc(100vh - 20px);
    border-color: #eee;
    border-radius: 10px;
    border-width: 1px;
    border-style: solid;
}

.toctitle {
    font-weight: bold;
}

.toc ul li {
  margin-bottom: 5px;
}