body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f5f5;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 20px;
}

h1 {
    color: #333333;
}

p {
    color: #666666;
}
body {
    ...
}

.container {
    ...
}

h1 {
    ...
}

p {
    color: #666666;
}

/* HIER UNTEN ANFÜGEN */

nav {
    background: #333;
}

.menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.menu li {
    position: relative;
}

.menu a {
    display: block;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
}

.menu a:hover {
    background: #555;
}

.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #333;
    list-style: none;
    padding: 0;
    margin: 0;
}

.submenu li {
    width: 100%;
}

.dropdown:hover .submenu {
    display: block;
}
.artikel {
    background: #ffffff;
    border: 1px solid #cccccc;
    padding: 15px;
    margin-bottom: 15px;
}
.artikel h2 {
    margin-top: 0;
}




.galerie {
    margin: 20px 0;
}

.vorschaubild {
    width: 200px;
    height: auto;
    margin: 5px;
    border: 1px solid #cccccc;
}

.vorschaubild:hover {
    border: 1px solid #333333;
}


.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
}

.lightbox-bild {
    max-width: 90%;
    max-height: 90%;
    display: block;
    margin: 3% auto;
}

.close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    cursor: pointer;
}

@media (max-width: 800px)
{
    .container
    {
        margin: 10px;
        padding: 10px;
    }

    .menu
    {
        flex-direction: column;
    }

    .galerie
    {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .vorschaubild
    {
        width: 90%;
        max-width: 400px;
    }

    h1
    {
        font-size: 2em;
    }

    h2
    {
        font-size: 1.4em;
    }
}



.kategorien {
    margin: 20px 0;
}

.katbutton {
    display: inline-block;
    background: #333;
    color: white;
    text-decoration: none;
    padding: 12px 20px;
    margin: 5px;
    border-radius: 5px;
}

.katbutton:hover {
    background: #555;
}


@media (max-width: 800px)
{
    .katbutton {
        display: block;
        width: 100%;
        box-sizing: border-box;
        text-align: center;
        margin-bottom: 10px;
    }
}