style.css

* {
    margin: 0;
    padding: 0;

    box-sizing: border-box;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
}

html {
    background: #ffffff;
    color: #1D1D1B;
    font-family: Verdana, "Bitstream Vera Sans", Arial Narrow, sans-serif;
    font-size: 13px;
}

body {
    background: #ffffff;
    color: #1D1D1B;
    font-family: Verdana, "Bitstream Vera Sans", Arial Narrow, sans-serif;
    font-size: 13px;
    height: 100%;
    margin: 0;
    overflow-x: hidden;
    position: relative; /* fix -> context menu */
    width: 100%;
}

main, footer {
    clear: both;
    float: left;
    position: relative;
    width: 100%;
    z-index: 1;
}

button, .button {
    background: #9a9a9a;
    border: 0 solid transparent;
    color: #fff;
    cursor: pointer;
}

button:hover,
.button:hover {
    background: #afafaf;
}

.cologne-bg-container {
    background: #f8f8f8;
}

/** navigation menu
 ===================================== */

.cologne-header-menu {
    float: left;
    height: 40px;
    overflow: hidden;
    width: 100%;
}

.quiqqer-menu-megaMenu-list-item-menu {
    background: #fff;
}

/** main / tpl body
 ===================================== */

.cologne-footer {
    min-height: 400px; /* dev help @todo muss später raus */
}

/** footer
 ===================================== */

.cologne-footer .cologne-footer-area {
    padding: 20px 0;
}

.cologne-footer .cologne-footer-copyright {
    padding: 20px 0;
}

/** grid
 ===================================== */

.cologne-grid-container {
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 1200px) {
    .cologne-grid-container {
        max-width: 1170px;
        padding-left: 0;
        padding-right: 0;
    }
}

@media (min-width: 1200px) {
    .cologne-grid-container {
        width: 1170px;
        max-width: 100%;
    }
}

@media (min-width: 992px) {
    .cologne-grid-container {
        max-width: 960px;
        max-width: 100%;
    }
}

@media (min-width: 768px) {
    .cologne-grid-container {
        max-width: 100%;
    }
}

@media (min-width: 576px) {
    .cologne-grid-container {
        max-width: 100%;
    }
}