body {
    background-image: url(bannergrau.jpg);
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.mdl-layout__header {
    background-color: transparent;
    border-bottom: 1px solid white;
}

.mdl-layout__header-row .mdl-layout-title {
    color: white;
}

.mdl-navigation__link:hover {
    color: black;
}

.mdl-layout-title {
    color: white;
    font-family: 'Smooch sans';
    font-size: 28px;
}

.mdl-navigation__link {
    color: white;
    font-family: 'Smooch sans';
    font-size: 22px;
}

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

main {
    flex: 1;
    padding-bottom: 100px;
}

/* ============================== */
/* Bilder Responsive Design       */
/* ============================== */

.box {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: nowrap;
    margin-top: 100px;
    margin-bottom: 25px;
}

.box img {
    height: 750px;
}

/* Mobile Optimierung */
@media (max-width: 768px) {
    .box {
        flex-direction: column;
        align-items: center;
        gap: 20px;
        margin-top: 50px;
    }

    .box img {
        width: 90%;
        height: auto;
        margin: 0 auto;
    }
}

/* ============================== */
/* Footer                         */
/* ============================== */

footer {
    margin-top: auto;
    background-color: #111;
}

.footerContainer {
    width: 100%;
    padding: 70px 30px 20px;
}

.socialIcons {
    display: flex;
    justify-content: center;
}

.socialIcons a {
    text-decoration: none;
    padding: 10px;
    background-color: white;
    margin: 10px;
    border-radius: 50%;
}

.socialIcons a i {
    font-size: 2em;
    color: black;
    opacity: 0.9;
}

.socialIcons a:hover {
    background-color: #111;
    transition: 0.5s;
}

.socialIcons a:hover i {
    color: white;
    transition: 0.5s;
}

.footerNav {
    margin: 30px 0;
}

.footerNav ul {
    display: flex;
    justify-content: center;
    list-style-type: none;
}

.footerNav ul li a {
    color: white;
    margin: 20px;
    text-decoration: none;
    font-size: 1.3em;
    opacity: 0.7;
    transition: 0.5s;
}

.footerNav ul li a:hover {
    opacity: 1;
}

.footerBottom {
    background-color: #000;
    padding: 20px;
    text-align: center;
}

.footerBottom p {
    color: white;
}

.designer {
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 400;
    margin: 0px 5px;
}

@media {
    .footerNav ul {
        flex-direction: column;
      }
    
      .footerNav ul li {
        margin: 10px 0;
      }
    
      .socialIcons a {
        padding: 8px;
        margin: 4px;
      }
}