h1 {
    background-color: powderblue;
}

.td_menu {
    padding-right: 5px;
    width: 25%;
    /* text-align: left; */
}

.td_middle {
    width: 5px;
    background-color: #cccccc;
}

.td_text {
    text-align: justify;
    /* width: 75%; */
    /* it does not seem to work */
    min-width: 200px;
}

.div_menu {
    height: 800px;
    overflow: auto;
    /* puts the scrollbar to the left */
    direction: rtl;
}

.div_text {
    height: 800px;
    overflow: auto;
    padding-left: 4px;
    padding-right: 4px;
}

table p,
table li {
    font-size: 16px;
}

#listHeader {
    padding-left: 5px;
    direction: ltr;
}

ul {
    padding-left: 20px;
    /* changes the direction back, overrides the scrollbar direction setting in the div_menu */
    direction: ltr;
}

.collapsed {
    list-style: url("../img/menu-collapsed.gif");
    font-variant: small-caps;
    font-weight: bold;
}

.leaf {
    list-style: url("../img/menu-leaf.gif");
    font-variant: normal;
    font-weight: normal;
}

.collapsed a {
    transition: 2s;
}

.collapsed a:hover {
    color: blue;
    text-decoration: none;
    background-color: rgb(240, 240, 255);
    border-radius: 5px;
}

.leaf a {
    transition: 2s;
}

.leaf a:hover {
    color: red;
    text-decoration: underline;
    background-color: rgb(253, 240, 220);
    border-radius: 5px;
}

h2.chaptertitle {
    padding: 0.25em;
    border-color: #6ea8a8;
    border-width: 1px 0 1px 0;
    border-style: solid;
    background-color: #c3f7e1;
    font-size: 2em;
    font-variant: small-caps;
    font-weight: bold;
    margin-top: 1em;
    /* text-align: left; */
    letter-spacing: 0.1em;
    color: #334e60;
}

img {
    max-width: 100%;
}

@media only screen and (max-height: 700px) {
    /* For tablets: max-width: 1000px  */
    .div_menu,
    .div_text {
        height: 600px;
    }
}

@media only screen and (max-height: 600px) {
    /* For mobile phones: max-width: 600px */
    .div_menu,
    .div_text {
        height: 550px;
    }
    h1 {
        display: none;
    }
}

@media only screen and (max-height: 500px) {
    .div_menu,
    .div_text {
        height: 450px;
    }
}

@media only screen and (max-height: 400px) {
    .div_menu,
    .div_text {
        height: 350px;
    }
}

@media only screen and (max-width: 1000px) {
    /* For tablets: max-width: 1000px  */
    h2.chaptertitle {
        font-size: 1.7em;
    }
}

@media only screen and (max-width: 800px) {
    /* For mobile phones: max-width: 600px */
    h2.chaptertitle {
        font-size: 1.5em;
    }
}

@media only screen and (max-width: 700px) {
    h2.chaptertitle {
        font-size: 1.3em;
    }
}