body, h1, h2, p {
    margin: 0px;
    padding: 0px;
}
body {
    font-family: Lucida Grande, Arial, sans-serif;
    padding: 30px;
}
h2 {
    font-size: 22px;
    margin-top: 20px;
}
p {
    font-size: 18px;
}
#overlay {
    position: fixed;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    z-index: 100;
    margin: 0px;
    background-color: rgba(250,250,250,0.9);
    display: none;
}
#olclose {
    position: absolute;
    top: 20px;
    right: 20px;
}
#olclose:hover {
    cursor: pointer;
}
header {
    padding: 10px;
    height: 150px;
    background-color: #ffCC00;
}
#logo {
    margin-left: 50px;
    float: left;
    display: inline-block;
}
#logo img {
    max-height: 150px;
}
#betrKopf {
    display: inline-block;
}
#betrKopf h1 {
    margin-left: 50px;
    margin-top: 45px;
    font-size: 50px;
    color: #3366FF;
}
#navigation {
    border-bottom: 2px solid #FFCC00;
    text-align: center;
    height: 50px;
}
#navigation ul {
    list-style-type: none;
    margin-top: 30px;
}
#navigation ul li {
    display: inline;
    font-size: 20px;
    border-right: 2px solid black;
    padding-top: 5px;
    padding-bottom: 5px;
}
#navigation ul li:last-child {
    border-right: 0px;
}
#navigation ul li:hover {
    background-color: #9CCFFF;
    border-radius: 2px;
    border-right: 0px;
}
#navigation a {
    text-decoration: none;
    color: #000;
    padding: 5px 20px;
}
.activ {
    color: #ffCC00;
    padding: 5px 20px;
}
#text {
    float: left;
    font-size: 18px;
    margin-left: 50px;
    margin-right: 00px;
    max-width: 700px;
}
#text ul li {
    margin-bottom: 20px;
}
#kontakt {
    width: 290px;
    float: right;
    margin-right: 50px;
    padding-bottom: 25px;
}
#kontakt p {
    clear: both;
    font-size: 16px;
    padding-top: 10px;
}
#kontakt input {
    font-size: 16px;
    width: 135px;
    margin-top: 10px;
}
#kontakt label {
    color: #9C9C9C;
    font-size: 16px;
}
#kontakt input[type='radio'] {
    width: 35px;
}
#kontakt textarea {
    margin-top: 10px;
    width: 285px;
    height: 70px;
    resize: none;
    font-size: 16px;
}
#kontakt ul {
    list-style-type: none;
    margin: 0px;
    padding: 0px;
    display: inline-block;
}
#kontakt ul li {
    float: left;
    margin-left: 10px;
}
#kontakt ul li:first-child {
    margin-left: 0px;
}
#kontakt ul li img {
    margin-top: 10px;
}
#kontakt #imgchange {
    margin-top: 44px;
    border: 3px outset #FFCC00;
    border-radius: 2px;
    padding: 5px;
    width: 30px;
}
#imgchange:hover {
    cursor: pointer;
}
#zertifikat {
    clear: both;
    display: inline-block;
    margin-left: 50px;
}
#zertifikat ul {
    list-style-type: none;
}
#zertifikat ul li {
    display: inline;
}
#zertifikat img {
    width: 150px;
    margin: 2px;
}
#zertifikat img:hover {
    cursor: pointer;
}
#referenz a {
    text-decoration: none;
}
#referenz ul {
    list-style-type: none;
    margin: 0px;
    padding: 0px;
}
#referenz ul li {
    float: left;
    margin: 20px;
}
#referenz ul li div {
    text-align: center;
    padding: 10px;
    border-radius: 5px;
    background-color: #FCFCFC;
}
#referenz ul li p {
    margin: 10px;
    color: #909090;
}
@media (max-width: 1200px){
    #text {
        max-width: 580px;
    }
}
@media (max-width: 1070px) {
    #text {
        margin-left: 20px;
    }
    #kontakt {
        margin-right: 20px;
    }
    #betrKopf h1 {
        font-size: 40px;
    }
}
@media (max-width: 1000px){
    #text {
        margin-left: 0px;
    }
    #kontakt {
        margin-right: 0px;
    }
}
@media (max-width: 950px) {
    #betrKopf h1 {
        font-size: 30px;
    }
    #navigation {
        height: 90px;
        text-align: left;
    }
    #navigation ul {
        margin-top: 5px;
    }
    #navigation ul li {
        display: inline-block;
        margin-top: 5px;
    }
    #text {
        max-width: 400px;
    }
}
@media (max-width: 800px) {
    header {
        height: 100px;
    }
    #logo {
        margin-left: 0px;
    }
    #logo img {
        height: 100px;
    }
    #betrKopf h1 {
        margin-top: 35px;
    }
    #text {
        max-width: 100%;
        float: none;
        clear: both;
    }
    #kontakt {
        float: none;
        clear: both;
        width: 100%
    }
}
@media (max-width: 650px) {
    body {
        padding: 5px;
    }
    #logo {
        display: none;
    }
    #betrKopf h1 {
        margin-left: 20px;
        margin-top: 20px;
        font-size: 25px;
    }
    #navigation ul {
        padding: 0px;
    }
    #navigation ul li a{
        font-size: 18px;
        padding: 5px 5px;
    }
    #referenz img {
        max-width: 250px;
    }
    .activ {
        padding: 5px 5px;
    }
    #referenz ul li {
        margin: 0px
    }
    #olimg img {
        max-width: 250px;
        border: 3px solid red;
    }
}