ActiveBox.css

html { 
    scroll-behavior: smooth; 
}

body {
    margin: 0;

    font-family: 'Raleway', sans-serif;
    font-size: 14px;
    color: #6c7279;

    background-color: #fff;
}

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

h1, h2, h3, h4, h5, h6 {
    margin: 0;
}

p {
    margin: 0 0 10px;
}

/* Container
--------------------------------------*/
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* header 
--------------------------------------*/
.header {
    position: absolute;
    width: 100%;
    height: 100px;

    top: 0;
    left: 0;
    z-index: 1000;
}

.header__inner {
    display: flex;
    justify-content: space-between;
    padding: 35px 0;
    border-bottom: 1px solid #505369;
    align-items: center;
}

.fixed {
    position: fixed;
    background-color: #2a2e48;
    height: 48px;
}

.fixed .header__inner {
    padding: 10px 0;
    border-bottom: none;
}

/* nav
--------------------------------------*/
.nav {
    display: flex;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
}

.nav__link {
    color:#fff;
    text-decoration: none;
    opacity: 0.75;
    margin-left: 60px;

    transition: opacity .1s linear;
}

.nav__link:first-child {
    margin-left: 0;
}

.nav__link:hover {
    opacity: 1;
}

/* intro
--------------------------------------*/
.intro {
    height: 750px;
    display: flex;
    justify-content: center;
    flex-direction: column;
    padding-top: 100px;

    background: #2a2e48 url(img/intro-bg.jpg) center no-repeat;
    background-size: cover;
}

.intro__inner {
    width: 100%;
    max-width: 870px;
    margin: 0 auto;
    text-align: center;
}

.intro__title {
    margin: 0 0 30px;
    font-family: 'Open Sans', sans-serif;
    font-size: 65px;
    line-height:1.1;
    color:#fff;
    font-weight: 700;
    text-transform: uppercase;
}

.intro__subtitle {
    font-size: 22px;
    color: #fff;
    line-height: 1.5;
    font-weight: 400;
    margin-bottom: 70px;
}

/* button
--------------------------------------*/

.btn {
    display: inline-block;
    vertical-align: top;
    padding: 14px 40px;

    border-radius: 2px;
    border: none;
    cursor: pointer;

    font-family: 'Raleway', sans-serif;
    font-size: 13px;
    color:#fff;
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    text-align: center;

    transition: background .1s linear;
}

.btn--red {
    background-color: #e84545;
} 

.btn--long {
    min-width: 280px;
}

.btn--red:hover {
    background-color:#bd3636;
}

/* features
--------------------------------------*/

.features {
    display: flex;
    flex-wrap: wrap;
    margin: 85px 0;
}

.features__item {
    width: 33.33333%;
    text-align: center;
    padding: 0 40px;
    margin: 35px 0;
}

.fearures__icon {
    margin-bottom: 25px;
}

.fearures__title {
    margin-bottom: 20px;

    color: #2d3033;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
}

.fearures__text {
    font-size: 14px;
    line-height: 1.5;
    color: #6c7279;
}

/* works
--------------------------------------*/

.works {
    display: flex;
    flex-wrap: wrap;
}

.work__item {
    width: 25%;
    height: 350px;
    position: relative;
    overflow: hidden;
    border-bottom: 1px white solid;
    border-right: 1px white solid;;
}

.work__item:hover .works__content {
    opacity: 1;
}

.work__img {
    min-width: 100%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.works__content {
    display: flex;
    flex-direction: column;
    justify-content: center;

    width: 100%;
    height: 100%;
    opacity: 0;
    
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;

    text-align: center;
    background-color: rgba(232, 69, 69, .9);

    transition: opacity .2s linear;
}

.works__title {
    margin-bottom: 5px;
    font-size: 14px;
    font-weight: 700;
    color:#fff;
    text-transform: uppercase;
}

.works__text {
    font-size: 14px;
    color:#fff;
}

/* team
--------------------------------------*/

.team {
    margin: 100px 0 70px;
}

.team__inner {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.team__item {
    width: 25%;
    padding: 0 15px;
    margin-bottom: 30px;
}

.team__img {
    display: block;
    max-width: 100%;
    height: auto;
    margin-bottom: 20px;
}

.team__name {
    margin-bottom: 8px;
    
    font-size: 22px;
    color:#2d3033;
}

.team__prof {
    margin-bottom: 15px;
    font-size: 13px;
    color: #e84545;
    text-transform: uppercase;
}

.team__text {
    margin-bottom: 20px;

    font-size: 14px;
    line-height: 1.5;
    color:#6c7279;
}

/* social
--------------------------------------*/

.social {
    display: flex;
}

.social--footer {
    justify-content: center;
}

.social__item {
    display: flex;
    width: 40px;
    height: 40px;
    justify-content: center;
    align-items: center;
    margin-right: 4px;

    background-color:#fff;
    transition: background-color .1s linear;

    border: 1px solid #e8ecee;
}

.social__item:hover {
    background-color: #e8ecee;
}

.social__item:hover .social__icon {
    fill: #000000;
}

.social--footer .social__item {
    background-color: transparent;
    border-width: 2px;
    border-color: #fff;
    border-radius: 2px;
}

.social--footer .social__item:hover {
    background-color:#fff;
}

.social__icon {
    display: block;
    height: 18px;
    fill: #c6cacc;
    transition: fill .1s linear;
}

.social--footer .social__icon {
    fill: #fff;
}

/* reviews
--------------------------------------*/

.reviews {
    background-color:#53354a;
}

.reviews__item {
    display: flex;
    flex-wrap: wrap;
}

.reviews__photo {
    width: 50%;
    height: 500px;
    position: relative;
    overflow: hidden;
}

.reviews__img {
    position: absolute;
    top: 50%;
    right: 0;
    z-index: 1;

    transform: translateY(-50%);
}

.reviews__content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 50%;
    padding: 80px;
}

.reviews__text {
    margin-bottom: 25px;
    font-family: 'Cardo', sans-serif;
    font-style: italic;
    font-size: 36px;
    line-height: 1.2;
    color:#fff;
}

.reviews__author {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    color: #fff;
}

/* BS
--------------------------------------*/

.carousel-control-prev {
    left: -3%;
}

.carousel-control-next{
    right: -3%;
}

.carousel-indicators {
    left: 50%;
}

.carousel-indicators [data-bs-target] {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-left: 6px;
    margin-right: 6px;
}

/* download
--------------------------------------*/

.download {
    margin: 100px 0;
    text-align: center;
}

.download__title {
    font-size: 28px;
    font-weight: 300;
    margin-bottom: 20px;
    color:#2d3033;
}

.download__text {
    font-size: 13px;
    font-weight: 700;
    color:#2d3033;
    text-transform: uppercase;
    margin-bottom: 40px;
}

/* footer
--------------------------------------*/

.footer {
    background-color:#3a3e64;
}

.footer__inner {
    padding: 70px 0;
    display: flex;
    flex-wrap: wrap;
}

.footer__block {
    width: 33.33333%;
    text-align: center;
    padding: 0 15px;
}

.footer__title {
    margin-bottom: 10px;
    font-size: 14px;
    font-weight: 700;
    color:#fff;
    text-transform: uppercase;
}

.footer__address {
    font-size: 14px;
    line-height: 1.5;
    font-style: normal;
    color:rgba(255, 255, 255, .5)
}

.footer__text {
    font-size: 14px;
    line-height: 1.5;
    font-style: normal;
    color:rgba(255, 255, 255, .5)
}

.copyring {
    padding: 20px 0;
    background-color:#313454;
}

.copyring__text {
    text-align: center;
    font-size: 14px;
    color:#808080;
    line-height: 1.5;
}

.copyring__text span {
    color:#fff;
}

/* burger
--------------------------------------*/

.burger {
    display: none;
    position: relative;
    width: 36px;
    height: 30px;
}

.burger__item {
    position: absolute;
    display: block;
    width: 30px;
    height: 0px;
    border: 2px #fff solid;
    border-radius: 2px;

    background-color:#fff;

    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: .75;
}

.burger__item::after, 
.burger__item::before {
    position: absolute;
    content: '';
    
    width: 30px;
    height: 0px;
    border: 2px #fff solid;
    border-radius: 2px;

    background-color:#fff;
}

.burger__item::after {
    top: 5px;
    left: -2px;
}

.burger__item::before {
    bottom: 5px;
    left: -2px;
}

.burger:hover {
    cursor: pointer;
}

.burger:hover .burger__item {
    opacity: 1;
    transition: opacity .1s linear;
}

/* media
--------------------------------------*/

@media (max-width: 1300px) {
    
    .work__item {
        width: 50%;
    }
}

@media (max-width: 991px) {

    .carousel-indicators {
        left: 0;
        bottom: -1%;
    }

    .nav {
        opacity: 0;

        width: 200px;
        text-align: right;
        position: absolute;
        right: 0;
        top: 100%;
        flex-direction: column;
        background-color:#2a2e48;
        transition: opacity 0.2s linear;
    }

    .show {
        opacity: 1;
    }

    .nav__link {
        margin: 0;
        padding: 10px 15px;
        border:1px solid #212438;;
    }

    .burger {
        display: block;
    }

    .intro__title {
        font-size: 40px;
    }

    .features__item {
        width: 50%;
    }

    .team__item {
        width: 50%;
        text-align: center;
    }

    .team__img {
        margin-left: auto;
        margin-right: auto;
    }

    .social {
        justify-content: center;
    }

    .reviews__photo {
        width: 100%;
        overflow: hidden;
    }

    .reviews__img {
        margin-top: 15px;
    }

    .reviews__content {
        width: 100%;
        padding: 40px;
    }

    .reviews__text {
        font-size: 25px;
    }

    .reviews__author {
        font-size: 10px;
    }

    .download {
        margin: 50px;
    }

    .footer__inner {
        padding: 25px;
    }
}

@media (max-width: 767px) {

    .intro {
        height: auto;
        padding-top: 130px;
        padding-bottom: 30px;
    }

    .intro__title {
        font-size: 30px;
    }

    .intro__subtitle {
        font-size: 16px;
        margin-bottom: 30px;
    }

    .features {
        margin: 40px 0;
    }

    .features__item {
        width: 100%;
        padding-left: 0;
        padding-right: 0;
    }

    .work__item {
        width: 100%;
        height: 300px;
    }

    .team {
        margin: 60px 0 30px;
    }

    .team__item {
        width: 100%;
    }

    .btn--long {
        min-width: 260px;
    }

    .footer__block {
        width: 100%;
        margin-bottom: 30px;
    }

    .footer__block:last-child {
        margin-bottom: 0;
    }

}

@media (max-width: 470px) {

    .reviews__img {
        right: -50%;
    }

    .btn--long {
        min-width: 155px;
    }
}