:root {
    --primary-gray: #4c4c4c;
    --blue: #2883ee;
    --blue-hover: #1B76E0;
    --gray-light: #f4f7fe;
    --green: #7ed779;
    --green-hover: #6dc669;
    --padding-horizontal: 4vw;
}

*, *::before, *::after {
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    margin: 0;
    padding: 0;
    color: var(--primary-gray);
}

html {
    scroll-behavior: smooth;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
    font-size: 15px;
}

a {
    text-decoration: none;
}

.blue_text {
    color: var(--blue);
}

.blue_button {
    padding: .5rem 1rem;
    color: #fff;
    background-color: var(--blue);
    border-radius: 64px;
    border: none;
    cursor: pointer;
    -webkit-transition: 0.2s;
    -o-transition: 0.2s;
    transition: 0.2s;
}

.blue_button:hover {
    background-color: var(--blue-hover);
}

.shadow {
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    -webkit-transition: 0.2s;
    -o-transition: 0.2s;
    transition: 0.2s;
}

/* Кнопка "Назад" */
.back-button {
    display: -webkit-inline-box;
    display: -ms-inline-flexbox;
    display: inline-flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--gray-light);
    border-radius: 8px;
    text-decoration: none;
    color: var(--blue);
    font-weight: 500;
    -webkit-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.back-button:hover {
    background: #E0E8F9;
    border-color: var(--blue);
    -webkit-transform: translateY(-2px);
        -ms-transform: translateY(-2px);
            transform: translateY(-2px);
}

.back-button svg {
    -webkit-transition: -webkit-transform 0.3s ease;
    transition: -webkit-transform 0.3s ease;
    -o-transition: transform 0.3s ease;
    transition: transform 0.3s ease;
    transition: transform 0.3s ease, -webkit-transform 0.3s ease;
}

.back-button:hover svg {
    -webkit-transform: translateX(-3px);
        -ms-transform: translateX(-3px);
            transform: translateX(-3px);
}


/* header */

header {
    position: fixed;
    width: 100%;
    background-color: #fff;
    z-index: 10;
}

header nav {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    padding: 10px var(--padding-horizontal);
}

header nav div {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    gap: 0.85rem;
}


header nav .logo {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 0.85rem;
}

header nav .logo div {
    white-space: nowrap;
    font-size: 15px;
    color: var(--blue);
    margin-right: 1rem;
}

header nav .links {
    position: relative;
}

header nav .link {
    padding: .5rem 1rem;
    background-color: var(--gray-light);
    border-radius: 64px;
    -webkit-transition: 0.3s;
    -o-transition: 0.3s;
    transition: 0.3s;
    white-space: nowrap;
    cursor: pointer;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: end;
        -ms-flex-align: end;
            align-items: flex-end;
}

header nav .link:hover {
    color: var(--blue);
}

header nav .open_other_links svg {
    color: var(--blue);
    -webkit-transform: rotate(90deg);
        -ms-transform: rotate(90deg);
            transform: rotate(90deg);
    -webkit-transition: .2s;
    -o-transition: .2s;
    transition: .2s;
}

header nav .support_links {
    position: absolute;
    left: 0;
    top: 125%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    pointer-events: none;
    opacity: 0;
    -webkit-transition: .2s;
    -o-transition: .2s;
    transition: .2s;
}

header nav .support_links .link {
    -webkit-box-shadow: 0 3px 9px rgba(0, 0, 0, 0.1);
            box-shadow: 0 3px 9px rgba(0, 0, 0, 0.1);
}


header nav .support_links.open {
    pointer-events: auto;
    opacity: 1;
}

header nav .open_other_links svg.open {
    -webkit-transform: rotate(-90deg);
        -ms-transform: rotate(-90deg);
            transform: rotate(-90deg);
}

header nav .tg {
    display: block;
    width: 100%;
    height: 92.5%;
}

header nav .tg img {
    display: block;
    height: 100%;
}

header nav .tg:hover img {
    -webkit-filter: brightness(0.9);
            filter: brightness(0.9);
}

header nav .account_links a:first-child {
    background-color: var(--blue);
    color: #fff;
}

header nav .account_links a:first-child:hover {
    background-color: var(--blue-hover);
}

header nav .account_links a:nth-child(2) {
    background-color: var(--green);
    color: #fff;
}

header nav .account_links a:nth-child(2):hover {
    background-color: var(--green-hover);
}

header nav .menu_btn {
    display: none;
}

header menu {
    display: none;
}


/* footer */

footer .footer_top {
    position: relative;
    padding: 4rem var(--padding-horizontal);
    border-radius: 2rem 2rem 0 0;
    background-color: var(--gray-light);
}

footer .footer_top .header_text {
    font-size: 2rem;
    margin-bottom: 2rem;
}

footer .footer_top .tg_block {
    margin-top: 1rem;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    gap: 0.8rem;
}

footer .blocks {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    gap: 2rem;
    z-index: 3;
    position: relative;
}

footer .blocks .block {
    -webkit-box-flex: 1;
        -ms-flex: 1;
            flex: 1;
    min-width: 0;
}

footer .pyramid {
    position: absolute;
    height: 320px;
    width: 290px;
    -webkit-transform: rotate(-54deg);
        -ms-transform: rotate(-54deg);
            transform: rotate(-54deg);
    top: 100px;
    left: -200px;
    z-index: 1;
}

footer .footer_bottom {
    position: relative;
    padding: 0 var(--padding-horizontal) 2rem;
    border-radius: 2rem 2rem 0 0;
    background-color: var(--blue);
    z-index: 2;
}

footer .footer_bottom * {
    color: #fff;
}

footer .footer_bottom .header_text {
    font-size: clamp(24px, 12vw, 136px); /* Мин: 24px, Желаемый: 12% ширины окна, Макс: 136px */
    white-space: nowrap;
    overflow: hidden;
    -o-text-overflow: ellipsis;
       text-overflow: ellipsis;
    opacity: 0.08;
}

footer .footer_bottom .blocks {
    margin: 1rem 0;
}

footer .footer_bottom p {
    font-weight: bold;
}

footer .footer_bottom .block {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    gap: 0.75rem;
    font-size: 13px;
}

footer .footer_bottom .block:nth-child(2) {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
        -ms-flex-direction: row;
            flex-direction: row;
    gap: 2.5rem;
}

footer .footer_bottom .block div {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    gap: 0.75rem;
    font-size: 13px;
}


/* video */

.video {
    position: fixed;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 20;
    display: none;
}

.video video {
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
    max-width: 80%;
    max-height: 95%;
}



/* media */

@media (max-width: 999px) {
    /* header */
    header nav .links {
        display: none;
    }

    header nav .account_links {
        display: none;
    }

    header nav .menu_btn {
        display: block;
    }

    header menu {
        position: fixed;
        top: 0;
        width: 100%;
        height: 100%;
        display: block;
    }

    header menu .menu {
        position: absolute;
        top: 0;
        right: 0;
        width: 80%;
        height: 100%;
        padding: 1.5rem;
        background-color: #fff;
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;
        -webkit-box-pack: justify;
            -ms-flex-pack: justify;
                justify-content: space-between;
        -webkit-transition: 0.2s;
        -o-transition: 0.2s;
        transition: 0.2s;
    }

    header menu.closed {
        pointer-events: none;
    }

    header menu.closed .shadow {
        opacity: 0;
    }

    header menu.closed .menu {
        right: -100%;
    }

    header menu .menu .logo {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-align: center;
            -ms-flex-align: center;
                align-items: center;
        -webkit-box-pack: justify;
            -ms-flex-pack: justify;
                justify-content: space-between;
    }

    header menu .menu .logo a {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-align: center;
            -ms-flex-align: center;
                align-items: center;
        gap: 0.5rem;
        color: var(--blue);
    }

    header menu .menu .logo .menu_btn path {
        color: var(--blue);
    }

    header menu .menu .links {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;
        gap: 0.5rem;
        margin: 2rem 0;
    }

    header menu .account_links div:nth-child(2) {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        gap: 0.75rem;
        margin-top: 1rem;
    }

    header menu .account_links .link {
        padding: 0.75rem;
        border-radius: 35px;
        display: block;
        width: -webkit-max-content;
        width: -moz-max-content;
        width: max-content;
    }

    header menu .account_links div:nth-child(2) a:first-child {
        background-color: var(--blue);
        color: #fff;
    }
    
    header menu .account_links div:nth-child(2) a:first-child:hover {
        background-color: var(--blue-hover);
    }
    
    header menu .account_links div:nth-child(2) a:nth-child(2) {
        background-color: var(--green);
        color: #fff;
    }
    
    header menu .account_links div:nth-child(2) a:nth-child(2):hover {
        background-color: var(--green-hover);
    }
}


@media (max-width: 800px) {
    /* footer_top */
    footer .footer_top {
        padding-top: 3rem;
    }

    footer .footer_top .header_text {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    footer .footer_top .blocks {
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;
        gap: 1rem;
    }

    footer .footer_top .blocks .block:first-child:empty {
        display: none;
    }

    footer .footer_top .pyramid {
        -webkit-transform: rotate(236deg);
            -ms-transform: rotate(236deg);
                transform: rotate(236deg);
        scale: 0.5;
        left: auto;
        right: -6.3rem;
        top: 200px;
    }

    /* footer_bottom */
    footer .footer_bottom .header_text {
        font-size: clamp(24px, 11vw, 136px);
        padding: 0.75rem 0;
    }

    footer .footer_bottom .blocks {
        display: -ms-grid;
        display: grid;
        -ms-grid-columns: 1fr 3.5rem 1fr;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem 3.5rem;
    }

    footer .footer_bottom .block {
        gap: 0.4rem;
    }

    footer .footer_bottom .block:nth-child(2) {
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;
        gap: 0.4rem;
    }

    footer .footer_bottom .blocks .block:nth-child(3) {
        grid-column: 1 / -1;
    }

    footer .footer_bottom * {
        line-height: 95%;
    }

    footer .footer_bottom .tg {
        -webkit-box-ordinal-group: 2;
            -ms-flex-order: 1;
                order: 1;
    }

    footer .footer_bottom .blocks_last {
        display: block;
    }

    /* video */
    .video video {
        max-width: 93%;
        max-height: 55%;
    }
}