@media screen and (min-width: 280px) and (max-width: 767px) {
    html {
        overflow-x: hidden;
    }
    .swiper_img img{
        top: 20px;
        width: 60%;
    }
    .app_phone img{
        width: 70%;
        margin: 30px 0 0 0;
    }
    .about_write h2{
        font-size: 15px;
        text-align: center;
        letter-spacing: 5px;
    }
    .app_header h2{
        font-size: 20px;
    }
    .app_desc_div , .app_desc , .text_right , .text_left{
        width: 100%;
        text-align: center;
        padding: 0;
    }
    .app_desc_write p{
        font-size: 15px;
    }

    .navbar_mobil_btn {
        display: block;
    }
    .about_product{
        width: 50%;
    }
    .service_job{
        margin: 0 0 30px 0;
    }
    .swiper_write {
        top: 150px;
    }
    .about_write {
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .app_desc_div , .app_desc , .text_right , .text_left{
        width: 100%;
        text-align: center;
        padding: 0;
    }
    .services_jobs {
        flex-direction: column;
    }
    .about_quercus_desc {
        width: 100%;
    }
    .about_quercus_istatik {
        width: 100%;
    }
    .services_desc {
        width: 100%;
        text-align: center;
        box-sizing: border-box;
        padding: 0 20px;
    }
    .black_info_box{
        top: -50px;
        font-size: 8px;
    }
    .about_quercus {
        padding: 120px 30px 120px 30px;
        flex-direction: column;
    }
    .services_what_we_do {
        padding: 140px 20px 120px 20px;
    }
    .service_swiper .swiper-wrapper .swiper-slide {
        width: 100% !important;
    }
    .app_header {
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .app_phone_div {
        flex-direction: column;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .app_desc .app_desc_div:last-child {
        margin-bottom: 0;
    }

    .app_header h2{
        font-size: 20px;
    }
    .form_info_container {
        flex-direction: column;
    }
    .form_container {
        width: 100%;
        padding: 0 20px;
    }
    .swiper_write span:first-of-type{
        font-size: 10px;
    }
    .info_container {
        width: 100%;
        padding: 0 20px;
    }
    .about_quercus ,.services_what_we_do , .home_footer_img{
        background-attachment: initial;
    }
    .home_footer_info_div {
        justify-content: space-evenly;
    }
    .home_footer {
        padding: 100px 20px;
    }
    .home_footer_info i{
        font-size: 15px;
    }
    .home_footer_info h5 , .home_footer_info div span{
        font-size: 8px;
    }

    .pages_link_div {
        position: absolute;
        padding: 0 20px;
        left: 0;
        display: none;
    }
    .navbar {
        justify-content: space-between;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    } 
    .pages_link_div {
        flex-direction: column;
        align-items: baseline;
        background-color: white;
        opacity: 1;
        top: 60px;
        width: 100%;
        padding: 0;
    }

    .pages_link_div a {
        display: flex;
        justify-content: left;
        width: 100%;
        transition: all .2s linear;
        padding-left: 20px;
        border-bottom: 1px solid black;
    }

    .pages_link_div a:not(:last-child) {
        border-bottom: 1px solid black;
    }

    .pages_link_div a:hover {
        background-color: black;
        color: white;
    }

    .pages_link_div a::before {
        display: none;
    }

    .logo_div {
        width: 35%;
    }

    .services_header h2 {
        font-size: 19px;
    }

    .app_header h2 , .about_write h2 {
        font-size: 20px;
    }

    .swiper_write h2 {
        font-size: 25px;
    }
    .swiper_write{
        left: 10px;
        top: 80px;
    }
    .swiper-wrapper{
        height: 50% !important;
    }
    #start{
        height: 300px;
    }
    .pageStartSwiper{
        height: 100%;
    }
    .pageStartSwiper-prev{
        top:140px !important;
        left: 150px !important;
        width: 25px !important;
        height: 25px !important;
    }
    .pageStartSwiper-next{
        top:140px !important;
        left: 180px !important;
        width: 25px !important;
        height: 25px !important;
    }
    .pages_link_div a{
        height: 40px;
    }
    .swiper_write span:last-of-type {
        font-size: 6px;
        color: white;
    }

    .swiper_write p {
        margin-bottom: 10px;
        font-size: 10px;
    }

    .skill span {
        font-size: 8px !important;
    }
    .home_footer_info div span{
        color: #dedede;
    }
}
@media screen and (min-width: 768px) and (max-width: 1365px) {
    html {
        overflow-x: hidden;
    }

    .navbar_mobil_btn {
        display: block;
    }

    #start {
        align-items: baseline;
        /*height: 50vh;*/
        height: 100vh;
    }

    .service_job{
        margin-right: 20px;
    }

    .swiper_write {
        top: 50px;
    }

    .about_write {
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }

    .about_product {
        width: 100%;
    }

    .swiper_write h2 {
        font-size: 5rem;
    }
    .services_jobs {
        flex-wrap: wrap;;
    }

    .about_quercus_desc {
        width: 100%;
        margin-right: 20px;
    }

    .about_quercus_istatik {
        width: 100%;
    }

    .services_desc {
        width: 65%;
        text-align: center;
        box-sizing: border-box;
        padding: 0 20px;
    }

    .about_quercus {
        padding: 120px 30px 120px 30px;
    }

    .services_what_we_do {
        padding: 140px 20px 120px 20px;
    }

    .app_header {
        width: 65%;
        padding: 0 20px;
        box-sizing: border-box;
    }

    .app_phone_div {
        padding: 0 15px;
        box-sizing: border-box;
    }

    .app_phone {
        zoom: 0.7;
    }

    .app_desc .app_desc_div:last-child {
        margin-bottom: 0;
    }

    .text_right {
        padding-left: 0;
        width: 80%;
    }

    .text_left {
        padding-right: 0;
        width: 80%;
    }
    .form_container {
        width: 100%;
        padding: 0 20px;
    }

    .info_container {
        width: 100%;
        padding: 0 20px;
    }

    .home_footer {
        padding: 100px 20px;
    }
    .navbar {
        justify-content: space-between;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }

    .pages_link_div {
        flex-direction: column;
        align-items: baseline;
        background-color: white;
        opacity: 1;
        top: 60px;
        width: 100%;
        position: absolute;
        padding: 0 20px;
        left: 0;
        display: none;
    }

    .pages_link_div a {
        display: flex;
        justify-content: left;
        width: 100%;
        transition: all .2s linear;
        padding-left: 20px;
        font-size: 16px;
        border-bottom: 1px solid black;
    }

    .pages_link_div a:not(:last-child) {
        border-bottom: 1px solid black;
    }

    .pages_link_div a:hover {
        background-color: black;
        color: white;
    }

    .pages_link_div a::before {
        display: none;
    }

    .pageStartSwiper {
        /*height: 50vh;*/
        height: 400px;
    }

    .about_write_p_long {
        padding: 0 15%;
    }

    .logo_div {
        width: 35%;
        margin-top: 5px;
    }

    .logo_div {
        width: 25%;
    }

    .services_header h2 {
        font-size: 1.7rem;
    }
    .services_header h6{
        font-size: 10px;
    }
    .app_header h2 {
        font-size: 1.7rem;
    }

    .about_write h2 {
        font-size: 1.7rem;
    }
}
@media screen and (max-width: 1024px) {
    .products{
        width: 100%;
    }
}
@media screen and (max-width: 425px){
    .app_header h5{
        margin-bottom: 20px;
    }
    .app_desc_write{
        height: 70px;
    }
    .main_page_link{
        font-size: 20px;
    }
    #sehenswertes{
        margin-top: 0;
    }
    .about_product_desc h5{
        font-size: 10px;
    }
    #start{
        /*height: 40vh;*/
        height: 300px;
    }
    .swiper_write span:first-of-type{
        letter-spacing: 0;
    }
    .swiper_write{
        left: 10px;
    }
    .home_footer_img{
        height: 300px;
    }
    .service_job{
        width: max-content;
        margin-right: 0;
    }
    .services_header h6{
        font-size: 8px;
    }
    .services_what_we_do{
        padding: 0;
    }
    .services_header h2 ,.about_write h2 , .about_write{
        font-size: 19px;
        margin-bottom: 0;
    }
    .app_header h2{
        margin-bottom: 0;
    }

    .link_text h3 , .link_text::after{
        width: 100%;
    }
    .product img{
        min-height: 100px;
    }
    .product_img_wrapper{
        width: 100%;
    }
    .footer-links{
        justify-content: center;
        margin-right: 0 !important;
    }
    .anim_product_div{
        transform: translate(0);
        top: 0;
    }
   /* .pageStartSwiper-next , .pageStartSwiper-prev ,.pageStartSwiperButtons{
       display: none;
    }*/
    .products{
        width: 80%;
    }
    .product{
        width: 50%;
        margin: auto;
    }
    .product img{
        width: 70%;
    }
    .services_header h2{
        letter-spacing: 4px;
    }
    .pageStartSwiper-prev{
        top:150px !important;
        left: 10px !important;
        width: 15px !important;
        height: 15px !important;
    }
    .pageStartSwiper-next{
        top:150px !important;
        left: 40px !important;
        width: 15px !important;
        height: 15px !important;
    }
    .pageStartSwiper-next::after ,  .pageStartSwiper-prev::after{
        font-size: 10px !important;
    }
}