kiwix-desktop/resources/css/toc.css

#kiwix-toc-side {
    all: initial;
    position: fixed;
    top: 0px;
    left: 0px;
    width: 306px; /* ui/mainwindow.ui width and spacing */
    height: 100vh;
    border-right: 1px solid #ccc;
    background: white;
    margin: 0px;
    padding: 0px;
    z-index: 10000;
}

#kiwix-toc-title-div {
    all: initial;
    display: flex;
    justify-content: space-between;
    position: relative;
    font-size: 0px;
    height: 30px;
    margin: 0px;
    border: 0px;
    padding: 10px;
}

#kiwix-toc-title {
    all: initial;
    display: block;
    position: relative;

    font-size: 24px;
    line-height: 30px;
    font-weight: bold;
    font-family: Arial;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;

    margin: 0px;
    padding: 0px;
}

#kiwix-toc-hide-button {
    all: initial;
    display: flex;
    align-items: center;
    position: relative;

    background: white;
    color: #3366CC;

    margin: 0px;
    margin-top: 7px;
    padding: 0px;

    font-size: 12px;
    font-family: Arial;
    font-weight: bold;
}

#kiwix-toc-hide-button:hover {
    text-decoration: underline;
}

.kiwix-toc-item {
    all: initial;
    display: list-item;
    list-style-type: none;
    position: relative;
    width: 100%;
}
  
.kiwix-toc-list {
    all: initial;
    display: block;
    width: 100%;
    margin: 0px;
    padding: 0px;
    counter-reset: item;
}

.kiwix-toc-item-a {
    all: initial;
    color: inherit;
    outline: none;
    display: block;
    position: relative;

    padding-bottom: 3px;
    padding-top: 3px;
    border: none;
    border-top: 1px solid transparent;
    border-bottom: 1px solid transparent;

    font-size: 16px;
    line-height: 24px;
    font-family: Arial;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kiwix-toc-item-a:hover {
    color: inherit; 
    text-decoration: none;

    border-top: 1px solid #3366CC;
    border-bottom: 1px solid #3366CC;

    background-color: #D9E9FF; 
    cursor: pointer;
}

.kiwix-toc-item-a:before { content: counters(item, ".") " "; counter-increment: item; margin-right: 10px; padding-left: 10px; }

.kiwix-tool-tip {
    all: initial;
    display: none;
    position: fixed;

    background-color: #ffffe1;
    border: 1px solid black;
    padding: 5px;

    font-size: 16px;
    line-height: 20px;
    font-family: Arial;

    z-index: 10000;
}

.kiwix-toc-a {
    all: inherit;
    pointer-events: none;
}

.kiwix-toc-a:hover {
    all: inherit;
}

.kiwix-toc-a:visited {
    all: inherit;
}

#kiwix-toc {
    all: initial;
    display: block;
    position: relative;

    /* #kiwix-toc-title-div height&padding and #kiwix-toc border-top */
    height: calc(100vh - 51px);

    width: 100%;
    overflow: auto;
    border-top: 1px solid #ccc;
}

#kiwix-toc::-webkit-scrollbar {
    width: 5px;
    border: 1px solid #ccc;
    outline: none;
}

#kiwix-toc::-webkit-scrollbar-thumb {
    background-color: darkgrey;
    outline: none;
}