style.css

* {
  margin: 0;
  padding: 0;
  margin-block: 0;
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: currentColor;
  cursor: pointer;
}

ul {
  padding-inline: 0;
  list-style: none;
}

button {
  background: transparent;
  border: none;
  cursor: pointer;
}

html {
  font-family: 'Poppins', sans-serif;
  font-size: 100%;
  color: #4f4f4f;
}

body {
  font-size: 62.5%;
}
h1,
h2,
h3,
h4,
.header__nav__link {
  color: #333333;
}

h1 {
  font-family: Heebo;
  font-style: normal;
  font-weight: 800;
  font-size: 2.4em;
  line-height: 1.46em;
}

h2 {
  font-weight: bold;
}

h3,
h2,
.header__nav__link {
  font-size: 2.4em;
  line-height: 1.5em;
}

h3 {
  font-weight: 500;

  /* Gray 1 */
}

h4 {
  font-weight: 500;
  font-size: 1.8em;
  line-height: 1.5em;
}

h5 {
  font-weight: 500;
  font-size: 1.2em;
  line-height: 1.5em;
  color: #2d9cdb;
}

h6 {
  font-weight: 300;
  font-size: 1.2em;
  line-height: 1.5em;
  color: #828282;
}

main {
  padding: 4.8em 1.7em 10em 1em;
}

header {
  display: flex;
  justify-content: space-between;
  padding: 1.3em 1em;
}

.menu-btn.material-icons {
  font-size: 1.8em;
  line-height: 0.67em;
}

.header__nav {
  display: none;
}

header .header__nav ul {
  display: flex;
  width: 70.4em;
  justify-content: space-between;
}

.header__nav ul li a {
  font-weight: 500;
}

img {
  display: block;
}

.btn {
  padding: 0.56em 0.75em;
  font-size: 1.6em;
  line-height: 1.5em;
  margin-top: 1.875em;
}

.our__goal,
.intro__text {
  padding-left: 3em;
}

.intro__text {
  margin-bottom: 1.5em;
}

.hero__banner img {
  width: 100%;
  border-radius: 18px;
}

.hero__banner {
  min-height: 14.5em;
  border-radius: 1.8em;
  margin-bottom: 2.2em;
}

.news-letter {
  display: flex;
  flex-direction: column;
}

.our__goal p {
  font-size: 1.2em;
  line-height: 1.5em;
  max-width: 22.92em;
  margin: 2.5em 0;
}

.news-letter span {
  display: inline-block;
  font-weight: 500;
  font-size: 1em;
  line-height: 1.5em;
  padding-bottom: 0.6em;
  color: #828282;
}

.input__field {
  background: #f2f2f2;
  border-radius: 12px;
  width: 29.1em;
  display: flex;
  align-items: center;
}

.input__field button {
  font-size: 1.4em;
  line-height: 1.5em;
  color: #ffffff;
  background: #2d9cdb;
  border-radius: 12px;
  padding: 0.71em 1.5em;
  margin: 0.29em;
}

.input__field input {
  display: inline-block;
  width: 100%;
  height: 100%;
  border: none;
  font-weight: 500;
  font-size: 1.4em;
  line-height: 1.5em;
  padding-top: 1.07em;
  padding-bottom: 0.42em;
  padding-left: 1.14em;
  background-color: transparent;
  outline: none;
}

.input__field input::placeholder {
  font-weight: 500;
  font-size: 1.4em;
  line-height: 1.5em;
  color: #bdbdbd;
}

.section__services {
  margin-top: 10.2em;
  padding-left: 0.5em;
}

.section__services h3 {
  padding: 0 1.42em;
  margin-bottom: 1.79em;
}

.service__card {
  padding: 4.9em 3.4em 4.3em;
}

.service__card__icon {
  height: 6.7em;
  width: 6.7em;
  margin-bottom: 3.5em;
  color: #ffffff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service__card__icon__pen {
  background-color: #2d9cdb;
}

.service__card__icon__code {
  background-color: #27ae60;
}

.service__card__icon__list {
  background-color: #eb5757;
}

.service__card__icon__pen .material-icons {
  font-size: 2.7em;
  line-height: 1em;
}

.service__card__icon__code .material-icons {
  font-size: 2.875em;
  line-height: 0.58em;
}

.service__card__icon__list .material-icons {
  font-size: 3em;
  line-height: 0.8em;
}

.service__card h2 {
  margin-bottom: 1em;
}

.service__card p {
  font-weight: normal;
  max-width: 17.06em;
  font-size: 1.6em;
  line-height: 1.5em;
}

.service__card .btn {
  background-color: #e0e0e0;
  color: #828282;
  border-radius: 12px;
}

.service__card__active {
  box-shadow: 0em 1em 3em rgba(51, 51, 51, 0.1);
  border-radius: 24px;
}

.service__card__active .btn {
  background: #2d9cdb;
  color: #ffffff;
}

.section__services ul li:not(:first-child) {
  margin-top: 3.7em;
}

.section__services ul li:nth-child(2) {
  margin-top: 7.5em;
}

.section__works {
  margin-top: 10.3em;
}

.section__works h3 {
  max-width: 11em;
  padding-bottom: 2em;
  margin-left: 1.46em;
}

.section__works ul {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 3.6em;
}

.section__works ul li:not(:first-child) {
  margin-top: 3.6em;
}

.link__read-more {
  font-size: 1.8em;
  line-height: 1.5em;
  display: flex;
  align-items: center;
  /* identical to box height */

  color: #2d9cdb;
}

.link__read-more .material-icons {
  display: inline-block;
  font-size: 0.89em;
  margin-left: 0.75em;
}

.section__works__card picture {
  display: block;
  width: 35.1em;
  height: 35.1em;
  overflow: hidden;
  margin-bottom: 1.3em;
}

.section__works__card img {
  width: 100%;
  border-radius: 12px;
}

.section__team {
  margin-top: 10em;
}

.section__team__info h4 {
  color: #eb5757;
  margin-bottom: 0.34em;
}

.section__team h3 {
  font-size: 3.6em;
  max-width: 7.78em;
}

.section__team p {
  font-size: 1.6em;
  line-height: 1.5em;
  padding-top: 0.875em;
  max-width: 17.06em;
}

.section__team ul {
  display: grid;
  grid-template-columns: 17.8em 16.225em;
  grid-template-rows: 14.5em 16.7em;
  grid-gap: 0.9em 0.9em;
  margin: 3.6em 0 10em;
}

.section__team ul li:first-child picture {
  width: 14.5em;
}

.section__team ul li:last-child {
  grid-row-start: 1;
  grid-row-end: 3;
  display: flex;
  align-items: center;
}

.section__team ul li picture {
  display: block;
  overflow: hidden;
  border-radius: 12px;
  max-height: 100%;
}

.section__team ul li picture img {
  display: block;
  width: 100%;
}

.section__client p {
  font-size: 2.4em;
  line-height: 1.5em;
  max-width: 14.625em;
  font-weight: 500;
  color: #333333;
}

.section__client h2 {
  font-weight: 500;
}

.section__client h4 {
  color: #828282;
}

.author {
  display: flex;
  padding-top: 2.7em;
}

.author h3 {
  margin-top: 0.5em;
}

.author picture {
  display: inline-block;
  padding-right: 3em;
}

.author img {
  width: 8em;
  border-radius: 12px;
}

footer li,
footer h1 {
  color: #ffffff;
}

footer h1 {
  font-size: 3.6em;
  line-height: 1.47em;
}

footer {
  background-color: #100e1d;
}

.footer__container__fluid {
  padding-top: 3.6em;
  padding-left: 4.1em;
  margin-bottom: 11em;
}

.footer__nav ul li a {
  font-size: 1.8em;
  line-height: 200%;
}

footer h1 {
  margin-top: 1.78em;
}

footer .social-network {
  padding-bottom: 6.4em;
}

.social-network ul {
  display: flex;
  padding-top: 0.8em;
}

footer .social-network li:not(:last-child) {
  padding-right: 1.1em;
}

.footer__sign {
  margin: 0 auto;
  padding-bottom: 1.71em;
  text-align: center;
  font-size: 1.4em;
  line-height: 1.21em;
  color: #f2f2f2;
}

.footer__sign strong {
  text-decoration: underline;
}

@media screen and (max-width: 375px) {
  header,
  footer,
  main {
    min-width: 375px;
  }
}

@media screen and (min-width: 375px) and (max-width: 959px) {
  body {
    font-size: calc(100vw * 10 / 375);
  }
  header,
  footer,
  main {
    margin: 0 auto;
    width: 37.5em;
  }
  footer {
    width: 100vw;
  }
}

@media screen and (min-width: 768px) and (max-width: 959px) {
  body {
    font-size: 20px;
  }
}

@media screen and (min-width: 960px) {
  main,
  header {
    margin: 0 auto;
    max-width: 133.4em;
  }

  main {
    padding: 9.6em 0.4em 20em 0;
  }

  header {
    padding: 4.2em 0.4em 0 0;
    align-items: center;
  }

  .header__nav {
    display: block;
  }

  header .menu-btn {
    display: none;
  }

  .intro__text,
  .our__goal {
    padding-left: 22.5em;
  }

  .intro__text,
  .hero__banner {
    margin-bottom: 4.2em;
  }

  h1,
  h3 {
    font-size: 3.6em;
    line-height: 1.47em;
  }

  .link__read-more,
  h5 {
    font-size: 1.8em;
    line-height: 1.5em;
  }

  h6 {
    font-size: 1.4em;
  }

  h4 {
    font-size: 1.8em;
    line-height: 1.5em;
  }

  .section__works__card h4 {
    font-size: 2.4em;
    line-height: 1.5em;
    padding-bottom: 10px;
  }

  .intro__text h3,
  .our__goal h3 {
    font-size: 4.8em;
    line-height: 1.5em;
  }

  .intro__text h5 {
    padding-bottom: 0.89em;
  }

  .our__goal p {
    font-size: 1.8em;
    max-width: 20.33em;
    margin: 2.33em 0;
  }

  .news-letter span {
    font-size: 1.4em;
    padding-bottom: 0.64em;
  }

  .input__field input {
    font-size: 1.8em;
    line-height: 1.5em;
    padding-top: 1.07em;
    padding-bottom: 0.83em;
    padding-left: 1.17em;
  }

  .input__field input::placeholder {
    font-size: 1.8em;
    line-height: 1.5em;
  }

  .input__field button {
    font-size: 1.8em;
    line-height: 1.5em;
    border-radius: 12px;
    padding: 0.55em 1.5em;
    margin: 0.2em;
  }
  .section__services,
  .section__works,
  .section__team,
  .section__client {
    padding-left: 11.3em;
  }

  .section__services {
    margin-top: 20em;
    padding-left: 11.3em;
  }

  .section__services h3 {
    padding: 0;
    margin: 0;
  }

  .section__services ul {
    margin-top: 4.2em;
    display: flex;
  }

  .section__services ul li:not(:first-child) {
    margin: 0;
    margin-left: 4.1em;
  }

  .section__works {
    margin-top: 19.4em;

    position: relative;
  }

  .section__works ul,
  .section__works h3 {
    margin: 0;
    padding: 0;
  }

  .section__works ul li:not(:first-child) {
    margin: 0;
  }

  .section__works ul li:nth-child(even) {
    margin-bottom: 15em;
  }

  .section__works ul li:nth-child(odd) {
    margin-top: 15em;
    margin-right: 2em;
  }

  .section__works__card picture {
    display: block;
    width: 54.4em;
    height: 54.4em;
    overflow: hidden;
    margin-bottom: 1.3em;
  }

  .link__read-more {
    position: absolute;
    bottom: 0;
    right: 5.08em;
  }

  .section__team {
    display: flex;
    flex-wrap: wrap;
    margin-top: 21.9em;
  }

  .section__team__info {
    padding-right: 188px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .section__team .section__client {
    width: 100%;
    flex: 1 1 100%;
  }

  .section__team__gallery ul {
    grid-gap: 2.4em 2.4em;
    grid-template-columns: 32em 30em;
    grid-template-rows: 26em 30em;
    margin: 0;
  }

  .section__team ul li:first-child picture {
    width: 26em;
  }
  .section__client {
    padding-top: 19.6em;
  }

  .section__client p {
    padding-top: 0;

    max-width: 920px;
    font-size: 36px;
    line-height: 54px;
  }

  .author {
    padding-top: 4.9em;
  }

  footer {
    padding: 4.6em 0 0;
  }

  .footer__container__fluid {
    display: flex;
    max-width: 116.6em;
    margin: 0 auto;
    padding-left: 3em;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  footer h1 {
    margin-top: 0;
  }

  footer .input__field {
    width: 350px;
  }

  .footer__sign {
    margin-top: 118px;
  }
}

@media screen and (min-width: 960px) and (max-width: 1439px) {
  body {
    font-size: calc(100vw * 10 / 1440);
  }
}