.lf-whitesection {
    background: #fff;
    padding-bottom: 50px;
}

.lf-whitesection + .container-lf {
    padding-top: 86px;
}

.video-mobile {
    display: none;
}

.site-content .new-main .lf-main-top-section {
    border:0;
    padding-bottom: 100px;
}

.lf-contest-challenge-20 {
    position: relative;
    overflow: hidden;
    background: #f2f4f7;
    min-height: 840px;
    display: flex;
    justify-content: center;
    flex-direction: column;
}

.lf-contest-challenge-20__bg {
    position: absolute;
    inset: 0;
}

.lf-contest-challenge-20__video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lf-contest-challenge-20__container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
    padding: 0 150px;
    height: 100%;
}

.lf-contest-challenge-20__content {
    max-width: 670px;
}

.lf-contest-challenge-20__title {
    font-weight: 700;
    line-height: 72px;
    margin: 0 0 12px;
    font-size: 58px;
    color: rgba(0, 0, 0, 1);
}

.lf-contest-challenge-20__title span {
    display: inline-block;
}

.lf-contest-challenge-20__desc {
    margin: 0 0 24px;
    font-size: 20px;
    line-height: 24px;
    color: rgba(0, 0, 0, 1) !important;
}

.lf-contest-challenge-20__btn .btn:active {
    transform: scale(.98);
}

body.main[dir="rtl"] .lf-contest-challenge-20__content {
   margin-right: auto;
}

@media (max-width: 1600px) {
    .lf-contest-challenge-20__container {
        padding: 0 50px;
    }
}

@media (max-width: 1500px) {
    .lf-contest-challenge-20 {
        min-height: 720px;
    }

    .lf-contest-challenge-20__content {
        max-width: 500px;
    }
}

@media (max-width: 1400px) {
    .lf-contest-challenge-20__title {
        font-size: 45px;
        line-height: 55px;
    }
}

@media (max-width: 1200px) {
    .lf-contest-challenge-20 {
        min-height: 660px;
    }

    .lf-contest-challenge-20__title {
        font-size: 32px;
        line-height: 40px;
    }

    .lf-contest-challenge-20__desc {
        font-size: 16px;
    }

    .lf-contest-challenge-20__content {
        max-width: 400px;
    }
}

@media (max-width: 1000px) {
    .video-mobile {
        display: block;
    }

    .video-desktop {
        display: none;
    }

    .lf-contest-challenge-20 {
        min-height: auto;
        padding-bottom: 60px;
    }

    .lf-contest-challenge-20__bg,
    .lf-contest-challenge-20__video {
        position: static;
    }

    .lf-contest-challenge-20__video {
        aspect-ratio: 1 / 1;
    }

    .lf-contest-challenge-20__content {
        max-width: 100%;
        text-align: center;
    }

    .lf-contest-challenge-20__container {
        padding: 0 20px;
    }

    .lf-contest-challenge-20__title {
        font-size: 30px;
        line-height: 36px;
    }
}

@media (max-width: 780px) {
    .site-content .new-main .lf-main-top-section__block {
        margin-bottom: 0;
    }
}