style.css

/* Fonts */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&display=swap');

/* Reset */
* {
   margin: 0;
}

/* Variables */


html {
   box-sizing: border-box;
   font-size: 62.5%;
}
body {
   font-family: 'Montserrat';
   font-style: normal;
   font-weight: 400;
   font-size: 1.6rem;
}
p {
   color: grey;
}
.container {
   max-width: 1110px;
   margin: 0 auto;
}
.d-flex {
   display: flex;
   align-items: center;
}
.btn {
   display: inline-block;
   background-color: #4985FF;
   padding: 1.3rem 0;
   width: 200px;
   
   border-radius: 3rem;
   color:#fff;
   text-decoration: none;
   text-align: center;
}

/* Header */
.header {
   background-image: url(img/header.png);
   background-position: center;
   background-size: cover;
   background-repeat: no-repeat;
   width: 100%;
   height: 900px;
   color: #fff;
}
.line {
   position: relative;
   width: 100%;
   top: 10rem;
   border-bottom: 1px solid #A1A1A1;
   color: #fff;
}
.header li {
   display: inline-block;
   list-style: none;
}
.nav-item a {
   text-decoration: none;
   color:#fff;
}
.nav-item a:hover {
   text-decoration: underline;
   text-underline-offset: 4rem;
}
.header__block {
   display: flex;
   justify-content: center;
   align-items: center;
   height: 690px;
}
.text-box {
   text-align: center;
   max-width: 990px;
}
.text-box p {
   color: white;
}
.text-box h1 {
   font-weight: 800;
   font-size: 4.8rem;
   line-height: 64px;
   margin: 2rem 0 4rem;
}
.nav-links {
   width: 50%;
   margin-left: auto; /* Выравнивание по правому краю */
}
.nav-item {
   padding: 4rem 0rem;
   justify-content: space-between;
}
@media (max-width: 768px) {
   .nav-links {
      display: none;
   }
   .hamburger {
      display: block;
   }
}
@media (max-width: 567px) {
   .
}

/* Services */
.services__block {
   max-width: 750px;
   margin: 0 auto 5rem;
}
.services__block h1 {
   font-weight: 700;
   font-size: 3.6rem;
   line-height: 53px;
   margin-bottom: 4rem;
}
.services__blocks {
   text-align: center;
   margin: 11rem 0;
}
.services__project {
   margin-bottom: 5rem;
   width: 350px; /* Задание размера для последующего переноса flex-wrap: wrap */
}
.projects {
   justify-content: space-between;
   flex-wrap: wrap;
}
.service__text {
   margin-top: 6rem;
   width: 25rem;
   text-align: left;
}
.service__text h3 {
   margin-bottom: 1rem;
}
.services__icon {
   background-image: url(img/ico/project.png);
   background-size: 4rem;
   background-repeat: no-repeat;
   background-position: center;
   padding: 4.5rem;
   margin: 1rem;
   border: 1px solid #4985FF;
   border-radius: 4.5rem;
   outline: 1px solid #E0E0E0;
   outline-offset: 0.7rem;
   margin-top: -1rem;
   margin-right: 3rem;
}
@media (max-width: 768px) {
   .

}
@media (max-width: 567px) {
   .
}

/* About-us */
.about-us {
   background-color: #F6F6F8;
}
.short-line {
   border-bottom: 1px solid #E0E0E0;
}
.about-us__text {
   margin-right: 12rem;
}
.about-us__text h2 {
   font-size: 3.6rem;
   margin-bottom: 4rem;
}
.about-us__text p {
   margin-bottom: 3rem;
}
.about-us__img img {

   background-size: cover;
   width: 500px;
   height: 400px;
   margin: 10rem 0 9rem;
   border-radius: 3rem;
}
.about-us__numbers h3 {
   font-size: 3.6rem;
   font-weight: 400;
}
.about-us__numbers {
   justify-content: space-between;
   width: 90rem;
   margin: 7rem auto 0;
}
.about-us__numbers h3::before {
   content: "";
   display: inline-block;
   background-image: url(img/ico/web-programming.png);
   width: 30px;
   height: 30px;
   margin-right: 2rem;
}
.about-us__numbers p {
   margin-bottom: 7rem;
}
@media (max-width: 768px) {
   .

}
@media (max-width: 567px) {
   .
}

/* All-services */
.all-services {
   position: relative;
}
.bg-color-all-serv {
   position: absolute;
   background-color: #504DC2;
   height: 49rem;
   width: 100%;
   z-index: -1;
}

.all-services-block {
   padding:10rem 0 6rem;
}
.all-services-block2 {
   justify-content: space-between;
   flex-wrap: wrap;
}
.all-services-block h2 {
   font-weight: 700;
   font-size: 36px;
   line-height: 53px;
   color: #fff;
}
.all-services__item h2 {
   font-size: 1.8rem;
   margin: 3rem 0;
}
.all-services__item h2 span {
   color: #4985FF;
}
.all-services__item p {
   max-width: 35rem;
   margin-bottom: 3rem;
}

.all-services .short-line { /* Класс внутри класса */
   margin: 8.5rem 0;
}
@media (max-width: 768px) {
   .

}
@media (max-width: 567px) {
   .
}

/* All-projects */
.bg-color-projects {
   position: relative;
   background-color: #F6F6F8;
   height: 100%;
   width: 100%;
   z-index: -1;
}
.projects__blocks {
   text-align: center;
}
.projects__blocks h1 {
   padding: 10rem 0 3rem;
   font-weight: 700;
   font-size: 36px;
   line-height: 53px;
}
.projects__blocks p {
   display: inline-block;
   margin-bottom: 7rem;
   line-height: 25px;
   width: 73rem;
}
.projects__block {
   justify-content: space-between;
   margin-bottom: 5rem;
   flex-wrap: wrap;
}
.projects__blocks a {
   margin-bottom: 13rem;
}
@media (max-width: 768px) {
   .

}
@media (max-width: 567px) {
   .
}

/* Video */
.video {
   overflow:hidden; /* Убирает наследование margin дочернего video__block h1 */
}
.bg-video {
   position: absolute;
   background-image: url(img/Rectangle.png);
   background-position: center;
   background-size: cover;
   background-repeat: no-repeat;
   width: 100%;
   height: 57rem;
   z-index: -1;
}
.video__block {
   text-align: center;
}
.video__block h1 {
   font-weight: 700;
   font-size: 36px;
   line-height: 53px;
   color: #fff;
   margin: 7rem 0 3rem;
}
.video__block p {
   color: #fff;
   margin-bottom: 7rem;
}
.img-video {
   width: 970px;
   height: 430px;
   border-radius: 10px;
}
.video .short-line {
   margin: 8.5rem 0;
}
@media (max-width: 768px) {
   .

}
@media (max-width: 567px) {
   .
}

/* Subscribe */
.subscribe__block {
   text-align: center;
   margin-bottom: 8.5rem;
}
.subscribe__block h2 {
   font-size: 18px;
   margin-bottom: 2rem;
}
.subscribe__block p {
   margin-bottom: 3rem;
}
.subscribe-form-email {
   box-sizing: border-box; /* Задает фиксированный размер в 30rem */
   padding: 1.5rem 0 1.3rem 3.3rem;
   border: 1px solid #F2F2F2;
   border-radius: 5rem 0 0 5rem;
   width: 30rem;
}
.subscribe-form-btn {
   position: relative; /* Позволяет сдвигать элемент left/right */
   box-sizing: border-box;
   padding: 1.3rem 3.3rem 1.3rem 0;
   border: 1px solid #F2F2F2;
   border-radius: 0 5rem 5rem 0;
   background-color: #4985FF;
   color: #fff;
   width: 19rem;
   font-weight: 500;
   font-size: 16px;
   left: -5px;
   cursor: pointer;
}
.subscribe-form {
   margin-bottom: 3.5rem;
}
.subscribe__block p:last-child {
   font-size: 1.3rem;
}
@media (max-width: 768px) {
   .

}
@media (max-width: 567px) {
   .
}

/* Footer */
.footer {
   overflow:hidden;
   background-color: #F6F6F8;
}
.footer__block {
   display: flex;
   flex-direction: column;
}
.footer__blocks {
   margin-top: 7rem;
   align-items: flex-start; /* Выравнивание по верхнему краю */
   justify-content: space-between;
}
.footer__block p:nth-child(2)::before {
   content: '';
   display: inline-block;
   background-image: url(img/ico/envelope.png);
   width: 15px;
   height: 15px;
   margin-right: 1rem;
}
.footer__block p:nth-child(3)::before {
   content: '';
   display: inline-block;
   background-image: url(img/ico/call.png);
   width: 15px;
   height: 15px;
   margin-right: 1rem;
}
.footer__block p:nth-child(4)::before {
   content: '';
   display: inline-block;
   background-image: url(img/ico/placeholder.png);
   width: 15px;
   height: 15px;
   margin-right: 1rem;
}
.footer__block h2 {
   margin-bottom: 3.5rem;
}
.footer__block a {
   text-decoration: none;
}
.footer__block a::before {
   content: '';
   display: inline-block;
   background-image: url(img/ico/right-arrow.png);
   width: 10px;
   height: 10px;
   margin-right: 1rem;
}
.footer__block a +  a { /* Отступ только между элементами */
   margin-top: 3rem;
}
.footer__block p + p {
   margin-top: 3rem;
}
.footer .short-line { /* Класс внутри класса */
   margin-top: 7rem;
}
.footer__rights {
   text-align: center;
   margin: 3rem 0;
}
@media (max-width: 768px) {
   .

}
@media (max-width: 567px) {
   .
}