body {
    margin: 0;
    padding: 0;
}

h1 {
    color: rgb(21, 12, 129);
}

strong {
    color: red;
}

hr {
    margin: 50px 0 50px 0;
    color: blue;
}

#content {
    background-color: #e2e2e2;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 150px;
    left: 250px;
    min-height: 1500px;
}

#header {
    color: white;
    width: 100%;
    height: 150px;
    position: sticky;
    top: 0;
    left: 0;
    background-color: #0000aa;
}

#header h1 {
    line-height: 100px;
    padding-left: 20px;
    margin: 0;
}

#title {
    width: 100%;
    height: 100px;
}

#tabs-opener {
    position: absolute;
    top: 100px;
    left: 0;
    height: 50px;
    width: 50px;
    background-image: url("./img/menu_icon.png");
    cursor: pointer;
}

#tabs {
    position: absolute;
    top: 150px;
    height: 1000px;
    width: 250px;
    background-color: #7777aa;
}

#tabs h2 {
    margin: 0;
    height: 100%;
    width: calc(100% - 15px);
    padding-left: 15px;
    line-height: 50px;
}

#tabs-contents {
    background-color: #e2e2e2;
}

#tabs-contents > div > div {
    margin: 20px;
}

#content-body {
    margin-top: 150px;
    padding: 20px 20px;
    min-height: 1500px;
}

summary {
    color: #0000aa;
    font-size: 20px;
    cursor: pointer;
}

details details {
    margin-left: 50px;
}

.linkDownload {
    margin-top: 10px;
    margin-bottom: 10px;
    margin-right: 7px;
    padding: 8px 12px;
    border: solid 1px #4169e1;
    border-radius: 7px;
    background-color: lightgoldenrodyellow;
    color: #4169e1;
}

.linkPlay {
    margin-top: 10px;
    margin-right: 7px;
    padding: 8px 12px;
    border: solid 1px #4169e1;
    border-radius: 7px;
    background-color: #4169e1;
    color: white;
}

.linkPlay:hover,
.linkPlay:active,
.linkDownload:hover,
.linkDownload:active {
    background-color: white;
    color: black;
}

.mytextbox {
    padding: 10px;
    width: 500px;
    border: 1px solid;
}

.mytextboxHighlight {
    font-size: 30px;
    padding: 10px, 10px;
    width: 550px;
    background-color: lightgoldenrodyellow;
    border: 1px solid;
}

.mytextboxDokus {
    margin-top: 50px;
    padding: 10px;
    width: 90%;
    background-color: lightgoldenrodyellow;
    border: 1px solid;
}

.header-tab {
    min-width: 125px;
    cursor: pointer;
    border-top: 1px solid #2222aa;
}

.header-tab-active {
    background-color: #e2e2e2;
    color: black;
}

.first_h1 {
    color: white;
}