* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: Helvetica;
    scroll-behavior: smooth;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: #B4C2D0;
    padding: 20px;
    text-align: center;
}

header a.logo-link {
    display: inline-block;
}

header img.logo-img {
    width: 200px;
    height: auto;
}

.navbar {
    background-color: #171A21;
    color: white;
    padding: 10px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-toggle {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    color: white;
    font-size: 24px;
}

.navbar-links {
    display: flex;
    flex-direction: row;
    width: 100%;
}

.navbar-links a {
    padding: 10px;
    flex: 1;
    box-sizing: border-box;
    text-align: center;
    color: white;
    text-decoration: none;
}

.navbar a.active {
    font-weight: bold;
}

.container {
    display: grid;
    grid-template-columns: 1fr 6fr;
    flex: 1;
    text-align: center;
}

aside {
    background-color: #B4C2D0;
    padding: 50px;
    text-align: center;
    display: none;
    flex-direction: column;
    align-items: center;
    position: relative;
    width: 100%;
}

aside.active {
    display: flex;
}

aside .toc {
    position: sticky;
    top: 55px;
    padding: 10px;
    background-color: #B4C2D0;
    border-radius: 8px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

main {
    background-color: white;
    padding: 20px;
    order: 2;
}

footer {
    background-color: #27333F;
    color: white;
    padding: 40px;
    text-align: center;
    width: 100%;
    margin-top: auto;
}

figure {
    margin: 20px 0;
    text-align: center;
}

figure img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

figcaption {
    margin-top: 10px;
    font-size: 14px;
    color: #555;
}

.large-img {
    width: 100%;
    height: auto;
}

.medium-img {
    width: 400px;
    height: auto;
}

.small-img {
    width: 200px;
    height: auto;
}

.vertical-img {
    width: 300px;
    height: auto;
}

.logo-img {
    width: 200px;
    height: auto;
}

.scroll-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background-color: #171A21;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 5px;
    display: none;
    opacity: 0;
    transition: opacity 0.3s, display 0.3s;
    z-index: 1000;
}

.scroll-to-top:hover {
    background-color: #27333F;
}

.toc {
    border: none;
    padding: 10px;
    background-color: #B4C2D0;
    border-radius: 8px;
}

.toc h3 {
    margin-top: 0;
}

.toc ul {
    list-style: none;
    padding-left: 0;
}

.toc ul ul {
    padding-left: 20px;
}

.toc a {
    text-decoration: none;
    color: #000;
}

.toc a:hover {
    text-decoration: underline;
}

.source-list {
    margin-top: 20px;
}

.source-item {
    background: #f9f9f9;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

.source-item h2 {
    margin-top: 0;
}

/* Media Queries für mobile Ansicht */
@media (max-width: 768px) {
    .navbar-toggle {
        display: block;
    }

    .navbar-links {
        display: none;
        flex-direction: column;
        width: 100%;
    }

    .navbar-links.active {
        display: flex;
    }

    .aside-toggle {
        display: block;
        cursor: pointer;
        background: none;
        border: none;
        color: white;
        font-size: 24px;
        padding: 10px;
        width: 100%;
        background-color: #171A21;
    }

    .container {
        grid-template-columns: 1fr;
    }

    aside {
        order: 1;
        width: 100%;
    }

    aside .toc {
        padding: 0;
    }

    main {
        width: 100%;
        padding: 20px;
        order: 2;
    }

    footer {
        position: static;
        order: 3;
    }

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
    }
}

@media (min-width: 769px) {
    .aside-toggle {
        display: none;
    }

    aside {
        display: flex;
    }
}