.text-left   { text-align: left;   }
.text-center { text-align: center; }
.text-right  { text-align: right;  }

.page-inner {
    max-width: calc(100% - 160px);
}
@media (max-width: 1240px) {
    .page-inner {
        max-width: calc(100% - 50px);
    }
}

.book-summary ul.summary ul.articles li.chapter :hover {
    color: #008cff;
}

pre.cmd {
    line-height: 1.4;
    font-size: 11pt;
    white-space: pre;
    color: #eee;
    background-color: #333;
    box-shadow: 5px 5px 9px 0 rgba(0,0,0,0.4) inset;
    border-radius: 3px;
}

pre.cmd .comment {
    color: #888;
    font-size: 11pt;
}

ul.summary>li.chapter>span {
    font-weight: bold;
}

ul.summary>li.chapter:first-child>span {
    color: #333;
    font-family: serif;
    /* font-weight: 900; */
    font-size: 40px;
    text-align: center;
    letter-spacing: 2px;
    font-style: italic;
    text-shadow: -1px -1px 1px rgba(0,0,0,0.1);
}