.main-div{
    width: 100%;
    font-size: 20px;
}
.header-div{
    width: 100%;
    float: left;
    padding: 40px;
}
.logo{
    height: 100px;
    width: 160px;
    padding-top: 10px;
    padding-left: 20px;
}
.arm{
    width: 100%;
    float: left;
    padding-left: 150px;
    padding-right: 150px;
    background-image:url('pictures/hintergrund2.jpg'); 
}
.img_1{
    height: 450px;
    width: 300px;
}
.img_3{
    width: 700px;
}
.logo_div{
    width: 30%;
    float: left;
}
.menu {
    width: 70%;
    float: left;
    z-index: 1;
    top: 0;
    padding-top: 65px;
}
.menu a{
    padding: 6px 25px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    }

.menu a:hover{
    color: #130f40;
}
.img_6{
    height: 400px;
    width: 500px;
    margin-left: 0px;
}

@media only screen and (min-width: 320px) {
    .col-sm-6{
        width: 100%;
    }
    .col-sm-12{
        width: 100%;
        margin: 0;
        padding: 0;
    }
    .img_1 {
        width: 100%;
        margin-top: 20px;

    }
    .img_3{
        width: 100%;
    }
    .logo {
        height: 150px;
        width: 220px;
    }
    .p_1{
        padding-bottom: 30px;
    }
    .arm{
        width: 100%;
        padding: 0 49px;
    }
    .fa{
        padding-left:390px;
        padding-top: 50px;
    }
    .img_6{
        height: 250px;
        width: 200px;
        margin: 10px 0px;
    }
    .img_7{
        width: 200px;
    }
}

@media only screen and (min-width: 375px) {
    .fa {
        padding-left: 370px;
    }
}

@media only screen and (min-width: 425px) {
    .fa{
        padding-left: 330px;
    }
}

@media only screen and (max-width: 768px) {
    .menu{
        width: 100%;
        display: none;
        overflow: hidden;
        background-color: rgb(51, 51, 51);
        position: relative;
        padding-top: 0px !important;
        position: absolute;
        right: 0px;
        top: 10%;
        border-radius: 10px;
    }
    .menu a {
        color: white;
        padding: 14px 16px;
        text-decoration: none;
        font-size: 17px;
        display: block;
    }
    .icon {
        float: left;
        position: absolute;
        right: 20px;
        top: 20px;
    }
    .menu a:hover {
        background-color: #ddd;
        color: black;
    }

    .active {
        background-color: #04AA6D;
        color: white;
    }
    }

    @media only screen and (min-width: 768px) {
        .icon {
            display: none;
        }
        .arm{
            width: 100%;
        }
        .img_1{
            margin: 20px 0px;
            width: 330px;
        }
        .img_3{
            width: 670px;
        }
        .logo {
            height: 120px;
            width: 180px;
        }
        .menu{
            padding-top: 50px;
        }
        .header-div {
            padding: 20px;
        }
        .img_6{
            margin: 20px 0px;
            width: 330px;
        }
    }

    @media only screen and (min-width: 1024px) {
    .col-sm-6 {
        width: 50%;
    }
    .img_1{
        margin: 20px;
        width: 400px;
    }
    .img_3{
        margin: 40px 124px;
    }
    .menu a{
        padding: 0 45px;
    }
    .img_6{
        margin: 20px;
        width: 400px;
    }
    }

    @media only screen and (min-width: 1440px) {
    .menu a{
        padding: 0 30px;
    }
    .arm{
        padding: 40px 70px;
    }
    .img_1 {
        margin: 20px 70px;
    }
    .img_3{
        width: 85%;
        margin: 40px 93px;
    }
    .img_6{
        margin: 20px 70px;
    }
    }

    @media only screen and (min-width: 2560px) {
    .body{
        font-size: 40px;
    }
    .img_1{
        width: 700px;
        height: 900px;
    }   
    .h2{
        font-size: 50px ;
    }
    .p_1{
        font-size: 30px;
    }
    .menu{
        margin-top: 50px;
    }
    .img_6{
        width: 900px;
        height: 700px;
        margin-left: 100px;
    }  
    .img_7{
        width: 500px;
    }
}