@media screen and (max-width:1146px) {
    .smart__header-nav ul {
        display: none;
    }
    .popup__nav-elem-wrap {
        flex-direction: column;
        padding: 0;
    }
    .smart__header-menu {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 100;
        background-color: #000;
        padding: 20px;
        transition: all .3s linear;
        transform: translateX(100%);
    }

    .smart__header-menu.open {
        transform: translateX(0);
    }

    .smart__header-menu__close {
        all: unset;
        display: block;
        cursor: pointer;
        position: fixed;
        top: 20px;
        right: 20px;
    }

    .smart__header-menu ul {
        list-style: none;
        margin-top: 80px;
    }

    .smart__header-menu ul li {
        margin-top: 20px;
    }

    .smart__header-menu ul li a {
        font-family: var(--font-family);
        color: #fff;
        font-size: 22px;
        text-align: left;
    }

    .smart__header_burger {
        display: block;
    }

    .smart__header__body {
        align-items: normal;
    }

    .smart__promo-text h1 {
        font-size: 48px;
        text-align: center;
    }

    .smart__promo-body {
        flex-direction: column-reverse;
    }

    .smart__promo-body_img,
    .smart__promo-text {
        margin: 0 auto;
    }

    .smart__promo-animation {
        margin: 50px auto 0;
    }

    .smart__old-body,
    .smart__how_items,
    .smart__service-body_items,
    .smart__adventages_items,
    .smart__contacts_body {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .smart__service-body_items {
        margin-top: 50px;
    }

    .smart__how_items {
        margin-top: 50px;
    }

    .smart__old-body-info h2,
    .smart__how-title,
    #smart-how > div > h2, #smart__adventages > div > div > h2,
    .smart__contacts_info h6 {
        font-size: 38px;
    }

    .smart__contacts_form-title {
        font-size: 32px;
    }

    .smart__old-body-info h2,
    .smart__old-body-title,
    .smart__old-body-info-descr {
        text-align: center;
    }

    .smart__old-body-info__cube {
        margin: 50px auto 0;
    }

    .smart__how_arrow01,
    .smart__how_arrow02,
    .smart__how_arrow03 {
        display: none;
    }

    .smart__service-title {
        text-align: center;
    }

    .smart__service_btn {
        margin: 40px auto 0;
    }

    .smart__service-body_item {
        max-height: unset;
    }
}

@media screen and (max-width:767px) {
    .smart__header-feedback {
        display: none;
    }

    .smart__header__body {
        padding-top: 15px;
    }

    .smart__promo-body_img {
        border-radius: 5px;
    }

    .smart__promo-text h1 {
        font-size: 32px;
    }

    .smart__promo-text ul,
    .smart__promo-animation {
        margin-top: 30px;
    }

    .smart__old-body-info h2,
    .smart__how-title,
    #smart-how > div > h2, #smart__adventages > div > div > h2,
    .smart__contacts_info h6 {
        font-size: 24px;
    }

    .smart__old-body-title {
        font-size: 20px;
    }

    .smart__old-body-info-descr {
        text-align: left;
    }

    .smart__old-body-info__cube {
        margin: 30px auto 0;
    }

    .notification__body p {
        text-align: center;
    }

    .notification {
        bottom: 20px;
    }
    

    .smart__old-body-info__cube p {
        font-size: 20px;
    }

    .smart__how_item {
        padding: 20px 15px 15px 15px;
        min-height: 320px;
        max-height: unset;
    }

    .smart__how_item:not(:nth-child(odd)) {
        min-height: 320px;
        max-height: unset;
    }

    .smart__service-body_item {
        min-height: 250px;
        padding: 25px;
    }

    .smart__service-body_item svg {
        margin-top: 30px;
    }

    .smart__service-body_items {
        gap: 30px;
    }

    .smart__clients-descr {
        margin: 30px auto 0;
        font-size: 18px;
    }

    .smart__clients_inner {
        margin-top: 45px;
    }

    .smart__contacts_info h6 {
        text-align: center;
    }

    .smart__contacts_info-data {
        margin-top: 30px;
    }

    .smart__contacts_info-data a,
    .smart__contacts_info-data p {
        font-size: 18px;
        text-align: center;
        margin: 20px auto 0;
    }

    .smart__contacts_form-title {
        font-size: 24px;
    }

    .smart__contacts_form {
        width: 100%;
    }

    .smart__contacts_body {
        gap: 30px;
    }

    .smart__contacts_form #form-start {
        margin-top: 30px;
    }

    .smart__header__body .header__logo img {
        max-width: 150px;
    }
    .smart__promo-body {
        margin-top: 0;
    }
}