@media only screen and (min-width: 1400px) and (max-width: 4000px) {

}

@media only screen and (min-width: 767px) and (max-width: 991px) {

    .contacts,
    .stage,
    .space {
        padding: 50px 0;
    }

    header nav ul li {
        display: inline-block;
        margin: 0 5px;
    }

    header .btn {
        padding: 0 10px;
        min-width: inherit;
    }

    .benefits .benefit {
        margin: 0 0 15px 0;
    }

    .contacts .info-block {
        margin: 0 0 15px 0;
    }

    .text {
        padding: 30px 0 30px 0;
    }

    .text-stage .cert img {
        margin-left: 0;
        margin-right: 15px;
    }

    .text-stage .cert {
        margin: 15px 0;
        display: inline-block;
    }
}

@media only screen and (min-width: 0px) and (max-width: 767px) {


    .nav-btn {
        z-index: 10000;
        width: 40px;
        height: 18px;
        cursor: pointer;
        position: relative;
        display: block;
        float: right;
        margin: 10px 0 0 0;
    }

    .nav-btn span {
        display: block;
        height: 4px;
        background-color: #000;
        position: absolute;
        right: 0;
        top: 0;

        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        -o-transform: rotate(0deg);
        transform: rotate(0deg);

        -webkit-transition: .1s ease-in-out;
        -moz-transition: .1s ease-in-out;
        -o-transition: .1s ease-in-out;
        transition: .1s ease-in-out;

        -webkit-transform-origin: left center;
        -moz-transform-origin: left center;
        -o-transform-origin: left center;
        transform-origin: left center;
    }

    .nav-btn span:nth-child(1) {
        width: 100%;
    }

    .nav-btn span:nth-child(2) {
        width: 100%;
        top: 7px;
    }

    .nav-btn span:nth-child(3) {
        width: 100%;
        top: 14px;
    }

    body.nav-open .nav-btn {
        transition-duration: .3s;
    }

    body.nav-open .nav-btn span {
        box-shadow: none;
        background-color: #000;
        right: -5px;
    }

    body.nav-open .nav-btn span:nth-child(1) {
        width: 100%;
        transform: rotate(45deg);
        top: -6px;
    }

    body.nav-open .nav-btn span:nth-child(2) {
        opacity: 0;
    }

    body.nav-open .nav-btn span:nth-child(3) {
        width: 100%;
        transform: rotate(-45deg);
        top: 22px;
    }


    header nav {
        height: 0;
        overflow: hidden;
        background-color: #fff;
        text-align: center;
        width: 100%;
        padding: 0;
        box-shadow: 0 10px 20px rgba(20, 80, 110, .15);
        border-radius: 6px;
    }

    body.nav-open nav {
        margin-top: 10px;
        height: 100%;
    }

    header nav ul {
        padding: 15px 0;
        border-top: 3px solid #49c038;
        border-radius: 6px;
    }

    header nav ul li {
        display: block;
        margin: 5px 0;
    }

    header nav ul li a {
        font-size: 18px;
        line-height: 24px;
        display: block;
        padding: 3px 0;
    }


    .text-stage .cert img {
        margin-left: 0;
    }

    .text-stage .cert {
        margin: 15px 0;
        display: block;
        text-align: center;
    }

    .text-stage img {
        margin-left: 0;
    }

    h1 {
        font-size: 34px;
        line-height: 44px;
    }

    h2 {
        font-size: 30px;
        line-height: 40px;
    }

    h3 {
        font-size: 26px;
        line-height: 32px;
    }

    h1, h2, h3, h4, h5, h6 {
        margin: 0 0 10px 0;
    }

    .space {
        padding: 30px 0;
    }

    header.fixed .logo img,
    header .logo img {
        height: 40px;
    }

    header .btn {
        padding: 0 10px;
        min-width: inherit;
        float: right;
        margin: 0 0 0 15px;
    }

    header .btn img {
        margin: 0;
    }

    .hero {
        padding: 100px 0 0 0;
    }

    .hero p {
        width: 100%;
    }

    .benefits h2 {
        text-align: center;
    }

    .benefits h6 {
        font-size: 16px;
        line-height: 22px;
        text-align: center;
    }

    .benefits .benefit .lab:after {
        margin: 0 auto;
    }

    .benefits .benefit {
        width: 100%;
        margin: 0 auto 15px;
        display: table;
        text-align: center;
    }

    .benefits .benefit .val {
        font-size: 22px;
        line-height: 22px;
    }

    .stage {
        padding: 15px 0;
        text-align: center;
    }

    .stage img {
        margin: 0 auto 20px auto;
        max-height: 250px;
    }

    .contacts {
        padding: 30px 0;
    }

    .contacts .info-block {
        margin: 0 0 15px 0;
    }

}