body {
    font-family: Open Sans, Arial, Geneva, Helvetica, sans-serif;
}
p.kontakt {
    margin: 1px;
    padding: 1px;
}
div.lectures {
    margin-left: 3em;
    width: 850px;
}
div.lecture {
    margin-left: 3em;
    width: 850px;
}
div.infovis-lecture {
    margin-left: 3em;
    width: 850px;
    background-color: white;
}
div.canvas {
    text-align: center;
    border: 1px solid #CC9999;
    padding: 15px;
}
div.code {
    width: 800px; 
    margin-left: 10px;
}
div.grid-container {
    display: grid;
    grid-template-columns: auto auto auto;
    gap: 1px;
    background-color: aliceblue;
    padding: 4px; 
    margin: 0 auto; 
    width: 600px;
    align-items: left;
    justify-items: left;
    border: 1px solid teal;
}
div.grid-item {
    text-align: left;
}
div.cell {
    margin: 1px;
}
li {
    margin-bottom: 5px;
}
div#dropdown-menu {
    font-family: sans-serif;
    font-size: 1em;
}
.grid-container-1-column {
    display: grid;
    grid-template-columns: auto;
    gap: 1px;
    background-color: white;
    padding: 4px; 
    margin: 0 auto; 
    width: 600px;
    align-items: center;
    justify-items: center;
    border: 1px solid teal
}
.grid-container-2-column {
    display: grid;
    grid-template-columns: auto auto;
    gap: 1px;
    background-color: white;
    padding: 4px;
    margin: 0 auto;
    width: 500px;
    align-items: center;
    justify-items: center;
    border: 1px solid teal
}
.grid-container-3-column {
    display: grid;
    grid-template-columns: auto auto auto;
    gap: 1px;
    background-color: white;
    padding: 4px;
    margin: 0 auto;
    width: 550px;
    align-items: center;
    justify-items: center;
    border: 1px solid teal
}
div.cell {
    margin: 1px;
}
div.impressum {
    text-align: right;
}
div.impressum a:link {
    color: #688BAB;
    text-decoration-line: underline;
    margin-left: 20px;
    margin-right: 2px;
}
div.impressum a:visited {
    color: #BD2D28;
    text-decoration-line: underline;
    margin-left: 20px;
    margin-right: 2px;
}
label.gui {
    margin-left: 5px; 
    text-align: left; 
    font-size: 16px; 
    font-family:'Times New Roman', Times, serif;
}
label.dropdown-label {
    font-family: Open Sans, Arial, Geneva, Helvetica, sans-serif;
    font-size: 1.0em;
    font-weight: 350;
}

.accordion {
    background-color: #eee;
    color: #444;
    box-shadow: 5px 5px 3px #888888;
    cursor: pointer;
    padding: 0px;
    padding-left: 30px;
    width: 100%;
    text-align: left;
    border: 1px solid #ccc;
    border-radius: 10px;
    outline: none;
    transition: 0.4s;
}
.active, .accordion:hover {
    background-color: #ccc;
}
.panel {
    font-size: 16px;
    padding: 0 18px;
    max-height: 0;
    background-color: white;
    box-shadow: 2px 2px 3px #888888;
    overflow: hidden; 
    transition: max-height 0.2s ease-out;
}
button.accordion.active, button.accordion:hover {
    background-color: #ccc;
}
button.accordion.active:after {
    content: "\2212";
}
button.accordion:after {
    content: '\002B';
    color: #777;
    font-size: 24px;
    font-weight: bold;
    float: right;
    margin-left: 5px;
    margin-right: 8px;
    margin-top: 10px;
}