* {
    padding: 0;
    margin: 0;
    border: 0;
}

.wrapper{
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
}

.center{
    max-width: 1360px;
    width: 100%;
    margin: 0 auto;
}

/* first-container */

.first-container header{
    height: 90px;
    background-color: #FFFFFF;
    border-bottom: 1px solid #D9D9D9;
    display: flex;
    align-items: center;
}

.first-container header .adaptiv{
    display: none;
}

.first-container header .logo{
    margin-right: 173px;
}

.first-container header .btn1{
    margin-right: 174px;
}

.langbtn {
    font-family: 'Inter';
    font-weight: 500;
    font-size: 15px;
    line-height: 18px;
    color: #141313;
    border: none;
    cursor: pointer;
    background-color: #FFF;
}

/* The container <div> - needed to position the dropdown content */
.lang {
    position: relative;
    display: inline-block;
}

/* Dropdown Content (Hidden by Default) */
.lang-content {
    display: none;
    position: absolute;
    background-color: #f1f1f1;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

/* Links inside the dropdown */
.lang-content a {
    font-family: 'Inter';
    font-weight: 500;
    font-size: 15px;
    line-height: 18px;
    color: #141313;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.lang .langbtn span{
    margin-left: 4px;
    vertical-align: 2px;
}

/* Change color of dropdown links on hover */
.lang-content a:hover {
    background-color: #ddd
}

/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */
.show {
    display:block;
}

.first-container header menu{ 
    display: flex;
}

.first-container header .menu ul{
    display: flex;
    width: 500px;
    justify-content: space-between;
    list-style-type: none;
    font-family: 'Inter';
}

.first-container header .menu .adaptiv-li1,
.first-container header .menu .adaptiv-li2,
.first-container header .menu .close{
    display: none;
}
.first-container header .menu .menu-head,
.first-container header .menu .menu-foot{
    display: none;
}

.first-container header .menu ul li a{
    text-decoration: none;
    font-size: 15px;
    line-height: 18px;
    color: #141313;
}

.first-container header .menu .link3{
    border-bottom: 1px solid #141313;
}

.first-container header .menu .link1:hover,
.first-container header .menu .link2:hover,
.first-container header .menu .link3:hover,
.first-container header .menu .link4:hover,
.first-container header .menu .link5:hover{
    border-bottom: 1px solid #141313;
}

.first-container header .video-link{
    margin-left: 292px;
}

.first-container header .video-link a span{
    margin-right: 12px;
}

.first-container header .video-link a{
    text-decoration: none;
    font-family: 'Inter';
    font-weight: 400;
    font-size: 14px;
    line-height: 17px;
    color: #141313;
}

/* container about-us */

.about-us .about-us-underheader{
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    column-gap: 30px;
    margin-top: 40px;
    margin-bottom: 48px;
}

.about-us .about-us-underheader .info1{
    width: 350px;
}

.about-us .about-us-underheader .info2{
    width: 285px;
}

.about-us .about-us-underheader .underheader h2{
    font-family: 'HelveticaNeueCyr Roman';
    font-weight: 400;
    font-size: 76px;
    line-height: 76px;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: #141313;
}

.about-us .about-us-underheader .info1 p,
.about-us .about-us-underheader .info2 p{
    font-family: 'Inter';
    font-weight: 400;
    font-size: 14px;
    line-height: 150%;
    color: #141313; 
}

.about-us .main-pic img{
    margin-bottom: 79px;
    width: 100%;
}

/* container our-work */

.our-work .underheader2{
    border-bottom: 1px solid #D9D9D9;
}

.our-work .underheader2 h3{
    margin-bottom: 30px;
    font-family: 'HelveticaNeueCyr Bold';
    font-style: normal;
    font-weight: 700;
    font-size: 24px;
    line-height: 24px;
    letter-spacing: -0.04em;
    color: #141313;
}

.our-work .types-of-work{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    column-gap: 27px;
    margin-top: 30px;
    margin-bottom: 160px;
}

.our-work .types-of-work p{
    font-family: 'Inter';
    font-weight: 500;
    font-size: 14px;
    line-height: 150%;
    text-align: center;
    color: #141313;
    margin-top: 20px;
}

.our-work .types-of-work img{
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* third-container */

.third-container footer{
    margin-top: 130px;
    height: 79px;
    background-color: #FFFFFF;
    border-top: 1px solid #D9D9D9;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.third-container footer .menu-footer{ 
    display: flex;
}

.third-container footer .menu-footer ul{
    display: flex;
    width: 515px;
    justify-content: space-between;
    list-style-type: none;
    font-family: 'Inter';
}

.third-container footer .menu-footer ul li a{
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    line-height: 18px;
    color: #141313;
}

.third-container footer .social-links .social1, 
.third-container footer .social-links .social2, 
.third-container footer .social-links .social3{
    margin-right: 12px;
}

@media screen and (max-width: 1440px){
    .center{
        width: 95%;
    }
}

@media screen and (max-width: 1380px){
    .first-container header .video-link{
        margin-left: 180px;
    }
}


@media screen and (max-width: 1270px){
    .first-container header .video-link{
        margin-left: 100px;
    }
    .first-container header .logo{
        margin-right: 105px;
    }
    .first-container header .btn1{
        margin-right: 100px;
    }
}

@media screen and (max-width: 1024px){
    .first-container header .btn1{
        display: none;
    }
    .first-container header .video-link{
        display: none;
    }
    .first-container header .adaptiv{
        display: block;
    }
    .first-container header .adaptiv{
        display: block;
    }
    .first-container header{
        justify-content: space-between;
    }
    .about-us .about-us-underheader{
        grid-template-columns: 1fr;
        column-gap: 0;
        row-gap: 30px;
        margin-bottom: 20px;
    }
    .about-us .about-us-underheader .info1,
    .about-us .about-us-underheader .info2{
        width: 100%;
    }
    .our-work .types-of-work{
        grid-template-columns: 1fr 1fr 1fr;
        row-gap: 30px;
        margin-bottom: 120px;
    }
    .third-container footer .menu-footer{
        display: none;
    }
    .third-container footer .social-links .social1, 
    .third-container footer .social-links .social2, 
    .third-container footer .social-links .social3{
        margin-right: 50px;
    }
    .first-container header .menu{
        position: fixed;
        left: -100%;
        top: 0;
        min-height: 100vh;
        width: 100%;
        background: #fff;
        z-index: 1;
        transition:  0.8s;
      }
    .first-container header .menu.open-menu{
        left:  0;
    }
    .first-container header .menu ul{
        flex-direction: column;
        justify-content: flex-start;
        height: 100vh;
        align-items: flex-start;
        margin-left: 16px;
    }
    .first-container header .menu ul li {
        margin-bottom: 30px;
    }
    .first-container header .menu .adaptiv-li1{
        display: block;
        margin-bottom: 53px;
    }
    .first-container header .menu .adaptiv-li2{
        display: block;
    }
    .first-container header .menu .close{
        display: block;
    }
    .first-container header .menu .menu-head{
        display: block;
        border-bottom: 1px solid #D9D9D9;
        width: 95%;
        margin: 0 auto 54px auto;
    }
    .first-container header .menu .menu-head img{
        margin: 10px 0 10px 15px;
    }
    .first-container header .menu .menu-foot{
        display: block;
        margin-top: -300px;
        border-top: 1px solid #D9D9D9;
        width: 95%;
        margin-left: 16px;
        padding-top: 20px;
    }
    .first-container header .menu .menu-foot a{
        text-decoration: none;
        font-family: 'Inter';
        font-weight: 400;
        font-size: 15px;
        line-height: 18px;
        color: #141313;
        margin-right: 38px;
    }
    .first-container header .menu .link5{
        margin-bottom: 60px;
    }
    .first-container header .menu .adaptiv-li1 span{
        margin-right: 12px;
    }
    .first-container header .menu ul li.close{
        display: block;
        position: absolute;
        right: 20px;
        top: 20px;
        font-size: 25px;
    }
}

@media screen and (max-width: 768px){
    .our-work .types-of-work{
        grid-template-columns: 1fr 1fr;
        margin-bottom: 100px;
    }
    .our-work .underheader2 h3{
        font-size: 40px;
    }
}

@media screen and (max-width: 600px){
    .our-work .types-of-work{
        grid-template-columns: 1fr;
        margin-bottom: 70px;
    }
}

@media screen and (max-width: 425px){
    .about-us .about-us-underheader .underheader h2{
        font-size: 56px;
    }
    .third-container footer .social-links .social1, 
    .third-container footer .social-links .social2, 
    .third-container footer .social-links .social3{
        margin-right: 20px;
    }
    .our-work .underheader2 h3{
        font-size: 25px;
    }
}