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

::-webkit-scrollbar {
    width: 0px;
}

::-webkit-scrollbar-track-piece {
    background-color: transparent;
    -webkit-border-radius: 6px;
}

.black-bg {
    background-color: #000000;
}

.gray-bg {
    background-color: #6e7176;
}

.red-bg {
    background-color: #ce202f;
}

.light-gray-bg {
    background-color: #e3e3e3;
}

.white-bg {
    background-color: #f3f3f3;
}

.black-txt {
    color: #000000;
}

.gray-txt {
    color: #6e7176;
}

.light-gray-txt {
    color: #e3e3e3;
}

.white-txt {
    color: #f3f3f3;
}

#main-menu {
    z-index: 1;
    position: absolute;
    width: 100vw;
    height: 50px;
}

#main-menu-logotype {
    position: absolute;
    font-size: 20px;
    font-family: "HelveticaNeueBoldCondensed";
    text-transform: uppercase;
    margin-left: 20px;
    margin-top: 13px;
}

#main-menu-btn {
    margin-top: 13px;
    margin-left: calc(100vw - 44px);
    position: absolute;
    cursor: pointer;
    display: none;
}

.main-menu-btn-bg {
    width: 20px;
    height: 2px;
    margin: 4px;
    background-color: #000000;
}

#main-menu-border{
    position: absolute;
    width: calc(100vw - 40px);
    height: 2px;
    margin-left: 20px;
    margin-top: 48px;
    background-color: #000000;
}

#sections {
    z-index: 0;
    position: absolute;
    width: 100vw;
    height: 100vh;
    overflow-x: hidden;
    overflow-y: scroll;
}

.section-auto-height {
    width: 100%;
    height: auto;
    padding-top: 100px;
    padding-bottom: 100px;
}

.section-view-height {
    width: 100%;
    height: 100vh;
}

.section-columns {
    display: grid;
    justify-content: center;
    align-content: center;
    width: 100%;
    height: 100%;
    gap: 40px;
}

#landing-txt {
    font-size: 16px;
    font-family: "HelveticaNeueCyr-Roman";
    line-height: 20px;
}

.landing-title {
    font-size: 40px;
    font-family: "HelveticaNeueCyr-Bold";
    line-height: 40px;
}

.landing-divider {
    width: 100%;
    height: 4px;
    margin-top: 10px;
    margin-bottom: 10px;
    background-color: #000000;
}

.expertise-columns {
    display: grid;
    justify-content: center;
    gap: 40px;
    width: 100%;
    height: 100%;
}

.expertise-column {
    width: 300px;
}

.expertise-header {
    width: 640px;
    margin-bottom: 40px;
}

.expertise-divider {
    width: 100%;
    height: 4px;
    margin-top: 10px;
    margin-bottom: 10px;
    background-color: #000000;
}

.expertise-title {
    font-size: 20px;
    font-family: "HelveticaNeueCyr-Bold";
    line-height: 20px;
}

.expertise-list {
    margin-left: 20px;
    font-size: 14px;
    font-family: "HelveticaNeueCyr-Roman";
    line-height: 20px;
}

@media (max-width: 920px) {
    .section-columns {
        grid-template-columns: calc(100vw - 80px);
    }

    .section-column {
        width: calc(100vw - 80px);
    }
}

@media (min-width: 921px) {
    .section-columns {
        grid-auto-flow: column;
    }

    .section-column {
        width: 400px;
    }
}

@media (max-width: 760px) {
    .expertise-header {
        width: calc(100vw - 80px);
        margin-left: 40px;
    }

    .expertise-columns {
        grid-template-columns: calc(100vw - 80px);
    }
    
    .expertise-column {
        width: calc(100vw - 80px);
    }
}

@media (min-width: 761px) {
    .expertise-header {
        margin-left: calc((100vw - 600px - 40px)/2);
    }

    .expertise-columns {
        grid-template-columns: 300px 300px;
    }
}

@media (min-width: 1140px) {
    .expertise-header {
        margin-left: calc((100vw - 900px - 80px)/2);
    }

    .expertise-columns {
        grid-template-columns: 300px 300px 300px;
    }
}

@media (min-width: 1480px) {
    .expertise-header {
        margin-left: calc((100vw - 1200px - 120px)/2);
    }

    .expertise-columns {
        grid-template-columns: 300px 300px 300px 300px;
    }
}

.case-studies-header {
    margin-bottom: 40px;
}

.case-study-columns {
    display: grid;
    gap: 40px;
    width: 100%;
    height: 100%;
    margin-left: 40px;
    padding-bottom: 40px;
}

.case-study-column {
    width: 300px;
}

.case-study-title {
    font-size: 60px;
    font-family: "HelveticaNeueCyr-Bold";
    text-transform: uppercase;
}

.case-study-header {
    padding-left: 40px;
    padding-top: 40px;
    padding-bottom: 40px;
}

.case-study {
    margin-bottom: 40px;
    background-color: #f3f3f3;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, .25);
}

@media (max-width: 760px) {
    .case-studies-header {
        width: calc(100vw - 80px);
        margin-left: 40px;
    }

    .case-study {
        width: calc(100vw - 40px);
        margin-left: 20px;
    }

    .case-study-header {
        width: calc(100vw - 120px);
    }

    .case-study-title {
        font-size: 40px;
    }

    .case-study-columns {
        grid-template-columns: calc(100vw - 120px);
        width: calc(100vw - 120px);
    }
    
    .case-study-column {
        width: calc(100vw - 120px);
    }
}

@media (min-width: 761px) {
    .case-studies-header {
        width: calc(600px + 120px);
        margin-left: calc((100vw - 600px - 120px)/2);
    }

    .case-study {
        width: calc(600px + 120px);
        margin-left: calc((100vw - 600px - 120px)/2);
    }

    .case-study-header {
        width: calc(600px + 40px);
    }

    .case-study-columns {
        grid-template-columns: 300px 300px;
    }
}

@media (min-width: 1140px) {
    .case-studies-header {
        width: calc(900px + 160px);
        margin-left: calc((100vw - 900px - 160px)/2);
    }

    .case-study {
        width: calc(900px + 160px);
        margin-left: calc((100vw - 900px - 160px)/2);
    }

    .case-study-header {
        width: calc(900px + 80px);
    }

    .case-study-columns {
        grid-template-columns: 300px 300px 300px;
    }
}


@media (min-width: 1480px) {
    .case-studies-header {
        width: calc(1200px + 200px);
        margin-left: calc((100vw - 1200px - 200px)/2);
    }

    .case-study {
        width: calc(1200px + 200px);
        margin-left: calc((100vw - 1200px - 200px)/2);
    }

    .case-study-header {
        width: calc(1200px + 120px);
    }

    .case-study-columns {
        grid-template-columns: 300px 300px 300px 300px;
    }
}

.divider-small {
    width: 40px;
    height: 2px;
    margin-top: 10px;
    margin-bottom: 10px;
}

.section-title {
    font-size: 40px;
    font-family: "HelveticaNeueCyr-Bold";
    text-transform: uppercase;
}

.section-txt {
    font-size: 16px;
    font-family: "HelveticaNeueCyr-Roman";
    line-height: 26px;
}

.section-txt-bold {
    font-size: 16px;
    font-family: "HelveticaNeueCyr-Bold";
    line-height: 26px;
}

a {
    color: #000000;
    font-size: 16px;
    font-family: "HelveticaNeueCyr-Medium";
    line-height: 26px;
    text-decoration: none;
}