body {
    font: 100%/1.4 Verdana, Arial, Helvetica, sans-serif;
    background: #42413C;
    margin: 0;
    padding: 0;
    color: #000;
}

.container {
    width: 960px;
    background: #ac9772;
    margin: 0 auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #AC9772;
    padding: 20px;
}

.logo {
    float: left;
    height: 165px;
    width: 613px;
}

.kera {
    height: 165px;
    width: 250px;
}

.navigation {
    background-color: #FFFFFF;
    border-top: 1px solid #333333;
    border-bottom: 1px solid #333333;
}

.main-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.main-menu li {
    position: relative;
}

.main-menu a {
    display: block;
    padding: 15px 20px;
    text-decoration: none;
    color: #333333;
}

.main-menu a:hover {
    color: #c55a22;
}

.submenu {
    list-style: none;
    margin: 0;
    padding: 0;
    position: absolute;
    display: none;
    background-color: #c55a22;
    min-width: 150px;
    z-index: 1000;
}

.submenu li {
    position: relative;
}

.submenu a {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: #FFFFFF;
}

.submenu a:hover {
    background-color: #ffffff;
    color: #c55a22;
}

.main-menu li:hover .submenu {
    display: block;
}

.arrow {
    float: right;
    align-self: center;
}

.fliesen-content {
    background-color: #FFFFFF;
    padding: 20px;
}

.fliesen-image {
    background-image: url('data/fiesen.jpg');
    background-repeat: no-repeat;
    background-position: center top;
    padding: 20px;
}

.fliesen-text {
    font-size: smaller;
    color: #333333;
    margin-top: 150px;
    padding: 29px;
}

.next-link {
    display: block;
    text-align: right;
}

.next-image {
    width: 83px;
    height: 33px;
}

.footer {
    text-align: center;
    background-color: #c65c22;
    padding: 10px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        width: 100%;
    }

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

    .logo, .kera {
        width: 100%;
        height: auto;
    }

    .main-menu {
        flex-direction: column;
        align-items: center;
    }

    .fliesen-image {
        background-size: cover;
        background-position: center;
    }
}