@font-face {
    font-family: 'Open Sans';
    font-weight: 300;
    font-style: normal;
    src: local('Open Sans'), url('../fonts/OpenSans-VariableFont_wdth,wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Open Sans';
    font-weight: 400;
    font-style: normal;
    src: local('Open Sans'), url('../fonts/OpenSans-VariableFont_wdth,wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Open Sans';
    font-weight: 500;
    font-style: normal;
    src: local('Open Sans'), url('../fonts/OpenSans-VariableFont_wdth,wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Open Sans';
    font-weight: 600;
    font-style: normal;
    src: local('Open Sans'), url('../fonts/OpenSans-VariableFont_wdth,wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Open Sans';
    font-weight: 700;
    font-style: normal;
    src: local('Open Sans'), url('../fonts/OpenSans-VariableFont_wdth,wght.ttf'), format('ttf');
}

@font-face {
    font-family: 'Roboto Slab';
    font-weight: 300;
    font-style: normal;
    src: local('Roboto Slab'), url('../fonts/RobotoSlab-VariableFont_wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Roboto Slab';
    font-weight: 400;
    font-style: normal;
    src: local('Roboto Slab'), url('../fonts/RobotoSlab-VariableFont_wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Roboto Slab';
    font-weight: 500;
    font-style: normal;
    src: local('Roboto Slab'), url('../fonts/RobotoSlab-VariableFont_wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Roboto Slab';
    font-weight: 600;
    font-style: normal;
    src: local('Roboto Slab'), url('../fonts/RobotoSlab-VariableFont_wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Roboto Slab';
    font-weight: 700;
    font-style: normal;
    src: local('Roboto Slab'), url('../fonts/RobotoSlab-VariableFont_wght.ttf'), format('ttf');
}
@font-face {
    font-family: 'Roboto Slab';
    font-weight: 800;
    font-style: normal;
    src: local('Roboto Slab'), url('../fonts/RobotoSlab-VariableFont_wght.ttf'), format('ttf');
}

/*@font-face {
    font-family: 'Great Vibes';
    font-weight: 400;
    font-style: normal;
    src: local('Great Vibes'), url('../fonts/GreatVibes-Regular.ttf'), format('ttf');
}*/

/*=== Сброс стилей ===*/

html, body, div, span, button, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, font, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font: inherit;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    line-height: 1; /* устанавливаем межстроковое расстояние */
}

ul, ol {
    list-style: none;
}
/* убираем маркеры для нумерованных и обычных списков, тогда добавить атрибут role в элементы-списки: <ul role="list"> <ol role="list"> */
blockquote, q {
    quotes: none; /* убираем кавычки для цитат */
}

    blockquote:before, blockquote:after, q:before, q:after {
        content: ''; /* убираем */
        content: none; /* и скрываем генерируемое содержимое */
    }

:focus {
    outline: 0; /* убираем контуры вокруг ссылок при фокусе */
}

ins {
    text-decoration: none; /* убираем подчеркивание для вставленного текста */
}

del {
    text-decoration: line-through; /* убираем перечеркивание для удаленного текста */
}

table {
    border-collapse: collapse; /* убираем рамки двойной толщины */
    border-spacing: 0; /* убираем расстояние между ячейками */
}

a {
    text-decoration: none;
    color: inherit;
}

button,
.button,
input[type="submit"],
input[type="reset"],
input[type="button"] {
    appearance: none;
    margin: 0;
    padding: 0;
    border: 0;
    outline: none;
    font: inherit;
    color: inherit;
    background: none;
    cursor: pointer;
}

/*= Общая стилизация текста =*/

.styled-list {list-style-type: disc; padding-left: 2.5em; margin: 1em 0;}
.styled-list > li {margin: 1em 0;}

p {
/*    text-indent: 2.5em;*/
    margin: 1em 0;
}
/*    p:last-of-type,
    li:last-of-type,
    li:last-of-type > p {
        margin-bottom: 0;
    }*/

/*=== Футер всегда внизу ===*/
html {
    height: 100vh;
}

#body {
    height: 100%;
    display: flex;
    flex-direction: column;
}

#header {
    flex: 0 1 auto;
}

#page-content {
    flex: 1 0 auto;
}

#footer {
    flex: 0 1 auto;
}

/*=== Стили страниц ===*/

/*=== Переменные ===*/
:root {
    /* Палитра */
    --color-primary-light: #255aa5;
    --color-primary: #1c437b;
    --color-primary-dark: #132c51;
    --color-accent-blue: #4eccff;
    --color-accent-orange: #eebb6c;
    --color-white: #fff;
    --color-menu: #1c437b;
    /**/
    --header-sticky-top-offset: 75px;
    --body-font-family: "Open Sans", 'Segoe UI', Helvetica, Tahoma, Geneva, Verdana, sans-serif;
    --body-font-size: 12px;
    --body-font-weight: 400;
    --body-line-height: 1.5;
    --header-font-family: "Roboto Slab", Georgia, "Times New Roman", serif;
    --color-accent: var(--color-accent-orange);
    --color-text-primary: var(--color-white);
    --color-text-primary-invert: #212121;
    --color-text-header: #deebff; 
    --color-text-secondary: #757575;
    --color-divider: #bdbdbd;
    --style-shadow: inset #132c51 0px 0px 5px 0px;
}

/*= Основные фоны =*/
#body {
    background-color: var(--color-primary-dark);
}
#header {
    background-color: var(--color-primary-light);
    background: -webkit-linear-gradient(0deg,var(--color-primary-light),var(--color-primary),var(--color-primary-dark)); /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(0deg,var(--color-primary-light),var(--color-primary),var(--color-primary-dark)); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
#main {
    background-color: var(--color-primary-dark);
}
.nav-bar-menu {
    background-color: var(--color-primary);
}
.main-section.feature .section-content .content-item {
    background-color: var(--color-primary);
}
#footer {
    background: var(--color-primary-light);
    background: -webkit-linear-gradient(0deg,var(--color-primary-dark),var(--color-primary),var(--color-primary-light)); /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(0deg,var(--color-primary-dark),var(--color-primary),var(--color-primary-light)); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

/*== Настройка базовых размеров шрифтов, относительно которых вычисляются значения размеров в em, rem ==*/
html {
    font-size: var(--body-font-size);
}

body {
    padding-top: var(--header-sticky-top-offset);
    font-size: inherit;
    font-family: var(--body-font-family);
    font-weight: var(--body-font-weight);
    line-height: var(--body-line-height);
    font-stretch: normal;
    font-style: normal;
    font-variant: normal;
    color: var(--color-text-primary);
    /*    background-image: linear-gradient(-45deg, var(--color-primary-1), var(--color-primary-0));*/
}
button {
    color: var(--color-white);
    padding: 0.5em 1em;
}
h1,
h2,
h3, 
.nav-bar-menu {
    color: var(--color-text-header);
    font-family: var(--header-font-family);
    letter-spacing: 0.075rem;
}

h1,
h2,
h3 {
    font-weight: 600;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

.nav-bar-menu {
    font-size: 0.9rem;
}

@media screen and (min-width: 576px) {
    html {
        font-size: 13px;
    }
}

@media screen and (min-width: 768px) {
    html {
        font-size: 14px;
    }

    h1 {
/*        font-size: 2.5rem;*/
    }

    h2 {
/*        font-size: 1.75rem;*/
    }
}

@media screen and (min-width: 992px) {
    html {
        font-size: 15px;
    }

    h1 {
/*        font-size: 2.5rem;*/
    }

    h2 {
/*        font-size: 1.75rem;*/
    }

    .nav-bar-menu {
/*        font-size: 0.85rem;*/
    }
}

@media screen and (min-width: 1200px) {
    html {
        font-size: 16px;
    }

    h1 {
/*        font-size: 2.5rem;*/
    }

    h2 {
/*        font-size: 1.75rem;*/
    }

    .nav-bar-menu {
/*        font-size: 0.8rem;*/
    }
}

@media screen and (min-width: 1400px) {
    html {
        font-size: 18px;
    }

    h1 {
/*        font-size: 3rem;*/
    }

    h2 {
/*        font-size: 2rem;*/
    }

    .nav-bar-menu {
        font-size: 0.8rem;
    }
}
/*==*/

/*== Настройка svg-значков ==*/
.fa-manual {
    line-height: normal;
/*    margin: 0 10px;*/
    font-size: 1rem;
}


.centering,
.svg-container {
    display: flex;
    align-items: center;
    justify-content: center;
}
    .svg-container > svg {
    height: 1rem;
    fill: var(--color-accent);
    vertical-align: initial;
}
/*==*/

#header {
    display: flex;
    justify-content: center;
    align-items: center;
    text-transform: uppercase;
    height: var(--header-sticky-top-offset);
    width: 100%;
    border-bottom: solid 1px var(--color-accent);
    position: fixed;
    top: 0;
    z-index: 100;
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100%;
    position: relative;
    margin: 0 1rem;
}

.nav-bar-brand {
    display: flex;
    /*        justify-content: space-between;*/
    align-items: center;
    /*            background: var(--main-logo) no-repeat;*/
    /*            background-size: contain;*/
    /*            background-position: left;*/
    /*            flex: 0 1 390px;*/
    min-height: 50px;
    margin-left: 1rem;
/*    margin-right: auto;*/
}

    .nav-bar-brand a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 50px;
        /*                color: transparent;*/
    }

    .nav-bar-brand .svg-container > svg {
        margin-right: 0.75rem;
        fill: var(--color-text-header);
        height: 1.5rem;
    }

.nav-bar-menu .menu-contacts .menu-contacts-list {
    text-transform:none;
}

    .nav-bar-menu .menu-contacts .menu-contacts-list .svg-container > svg {
        margin-right: 0.5rem;
        height: 1.25rem;
    }


.nav-bar-button {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex: 0 1 auto;
    height: 60px;
    padding: 1rem;
    background: none;
    border: none;
    outline: none;
    cursor: pointer;
/*    margin-left: 0.5rem;*/
}

@media only screen and (min-width: 1200px) {
    .nav-bar-button {
        display: none;
    }
}

.nav-bar-button .bar1,
.nav-bar-button .bar2,
.nav-bar-button .bar3 {
    display: block;
    width: 36px;
    height: 3px;
    margin: 4px 0;
    background-color: var(--color-accent);
    transition: 0.4s;
    flex: 0 0 auto;
}

.nav-bar-button.change-to-cross .bar1 {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-bar-button.change-to-cross .bar2 {
    display: none;
}

.nav-bar-button.change-to-cross .bar3 {
    transform: rotate(-45deg) translate(4px, -4px);
}

.nav-bar-email {
    text-transform: none;
    margin: 0 1rem 0 0;
}
@media screen and (max-width: 440px) {
    .nav-bar-email {
        display: none;
    }
}
.nav-bar-email .svg-container > svg {
    margin-right: 0.5rem;
    height: 1.25rem;
    fill: var(--color-text-header);
}


.nav-bar-menu {
    display: none;
    justify-content: flex-start;
    align-items: center;
    flex-direction: column;
    flex: 1 1 auto;
    text-transform: uppercase;
    border-radius: 0px 0px 10px 10px;
    min-width: 200px;
    width: 22rem;
    max-width: 400px;
    /*    box-shadow: inset white 0px 0px 15px -10px;*/
    box-shadow: var(--style-shadow);
    padding: 1.25rem 1.25rem 1rem;
    max-height: calc(100vh - var(--header-sticky-top-offset));
    overflow: auto;
    scrollbar-width: none;
    /*        scrollbar-color: var(--color-text-header) var(--color-primary-dark);*/
}

#header .nav-bar-menu.shown {
    display: flex;
    position: absolute;
    top: var(--header-sticky-top-offset);
}

.nav-bar-menu .menu-section {
    width: 100%;
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px dotted var(--color-divider);
}

/*    .nav-bar-menu .menu-section:nth-last-child(2) {
        margin-bottom: 2rem;
    }*/

    .nav-bar-menu .menu-section:last-child {
        padding-bottom: 0;
        margin-bottom: 0;
        border-bottom: none;
    }

.section-header {
    width: fit-content;
    border-bottom: 2px solid var(--color-accent);
    margin-bottom: 1.5rem;
    padding: 0 0.75rem 0.5rem 0;
}

.nav-bar-menu .menu-section .section-header {
    margin-bottom: 1.25rem;
}

    .nav-bar-menu .menu-section .section-content {
        padding: 0;
        margin: 0;
    }

        .nav-bar-menu .menu-section .section-content .menu-item {
            display: flex;
            width: 100%;
            /*                    padding: 0.5em 0px;*/
            border-bottom: 1px solid var(--color-divider);
        }

            .nav-bar-menu .menu-section .section-content .menu-item:last-child {
                border-bottom: none;
            }

            .nav-bar-menu .menu-section .section-content .menu-item .item-content {
                display: flex;
                justify-content: flex-start;
                width: 100%;
                padding: 0.75rem 0;
                color: var(--color-text-header);
                user-select: none;
            }

            .nav-bar-menu .menu-section .section-content .menu-item a:hover {
                color: var(--color-accent);
            }
#page-content {
    display: flex;
}

#aside .nav-bar-menu {
    display: none;
}

@media only screen and (min-width: 1200px) {
    #aside .nav-bar-menu {
        display: flex;
        position: sticky;
        top: var(--header-sticky-top-offset);
        height: 100%;
        border-radius: 0;
        padding: 1.5rem 2rem
    }
}

#main {
    /*    margin: 0 1.5rem;*/
    padding: 1.5rem;
}

@media only screen and (min-width: 576px) {
    #main {
/*        margin-left: 2rem;*/
        padding-left: 2rem;
    }
}

@media only screen and (min-width: 1200px) {
    #main {
/*        margin-left: 2.5rem;*/
        padding-left: 2.5rem;
    }
}

.main-section {
    position: relative;
    margin-top: 1.25rem;
    border-bottom: 2px solid var(--color-divider);
}
.main-section:last-of-type {
    border-bottom: none;
}

    /*= Для корректного скролла к якорю на странице, чтобы содержимое имело отступ от header(position:fixed) cоздаем элемент span нулевого размера с абсолютным позиционированием, отстоящий сверху на отрицательную высоту header с добавлением 1 rem =*/
    .main-section span.scroll-to-invisible-elem-header-offset {
        position: absolute;
        top: calc((var(--header-sticky-top-offset)) * (-1) - 1rem);
        /*        top: -75px;*/
        left: 0;
        width: 0px;
        height: 0px;
    }

    .main-section .section-header {
        margin-bottom: 2rem;
    }
    .main-section .section-content {
        margin-bottom: 3rem;
/*        padding: 0 1.5rem;*/
    }
    .main-section .section-content .content-item > p {
/*        text-indent: 2.5rem;*/
        margin: 1rem 0;
    }
    .main-section .section-content .content-item:last-of-type > p {
/*        margin-bottom: 0;*/
    }

    .main-section.feature .section-content .content-item .rotate-container {
        /*        border: 2px solid var(--color-divider);*/

        min-width: 7.2em;
        min-height: 7.2em;
    }
    .main-section.feature .section-content .content-item .svg-border {
        border: 2px solid var(--color-divider);
        transform: rotate(45deg);
        border-radius: 0.5rem;
        min-width: 5rem;
        min-height: 5rem;
    }
    .main-section.feature .section-content .content-item .svg-container > svg {
        /*        margin: 0;*/
        height: 2.5rem;
        transform: rotate(-45deg);
    }

    .main-section.feature .section-content {
        display: flex;
        flex-wrap: wrap;
        justify-content: center; 
        row-gap: 1rem;
        column-gap: 1rem;
    }
        .main-section.feature .section-content .content-item {
            display: flex;
            align-items: center;
            justify-content: flex-start;
            /* min-height: 7rem; */
            min-width: 20rem;
            max-width: 30rem;
            /* width: calc(50% - 3rem); */
            column-gap: 1rem;
            flex: 1 0 calc(50% - 1rem);
            /* margin: 0.5rem; */
            /*            border: 1px solid var(--color-divider);*/
            /*            box-shadow: inset white 0px 0px 15px -10px;*/
            box-shadow: var(--style-shadow);
            border-radius: 0.75rem;
            padding: 0.75rem;
        }

            .main-section.feature .section-content .content-item .flex-col-container {
                display: flex;
                flex-direction: column;
                align-items: flex-start;
                justify-content: center;
                row-gap: 1rem;
            }
            .main-section.feature .section-content .content-item .feature-header {
                font-weight: 400;
                letter-spacing: 0.025rem;
            }
            .main-section.feature .section-content .content-item .feature-button {
                display: block;
                text-decoration: none;
                cursor: pointer;
                color: var(--color-accent);
                background-color: transparent;
                font-weight: 600;
                letter-spacing: 0.025rem;
                padding: 0.35rem 1rem;
                outline: none;
                border: 2px solid var(--color-accent);
                border-radius: 0.5rem;
                line-height: normal;
            }

/*= кнопка наверх страницы =*/
.main-content .btn-up {
    display: none;
    position: fixed;
    background-color: var(--color-primary);
    opacity: 80%;
    right: 20px;
    bottom: 30px;
    border-radius: 0.75em;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    width: 3.5em;
    height: 3.5em;
    box-shadow: var(--style-shadow);
}

    .main-content .btn-up .svg-container > svg {
        height: 1.75rem;
    }

.main-content .btn-up-shown {
    display: flex;
}

    @media (hover: hover) and (pointer: fine) {
        .main-content .btn-up:hover {
            opacity: 1;
        }
    }
/*==*/
#footer {
    border-top: solid 1px var(--color-accent);
}
.footer-content {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    min-height: 50px;
    padding: 0 0.75rem;
}
/*= Кнопка назад =*/
.btn-block {
    margin: 0 0 0 0.25rem;
}

.btn-return {
    display: flex;
    background-color: var(--color-primary);
    opacity: 80%;
    border-radius: 50%;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    box-shadow: var(--style-shadow);

}

.btn-return.svg-container > svg {
    height: 1.75rem;
}