.page {
  min-width: 1100px;

  max-width: 1600px;

  margin: 0 auto;

  font-family: "Helvetica Neue", Arial, sans-serif;
}

.header {
  height: 100vh;
  min-height: 600px;
  max-height: 756px;

  background-color: #f2f2f2;
  display: flex;
  position: relative;
  overflow: hidden;
}
.logo_place_header {
  display: flex;
  width: 183px;
  height: 32px;
  position: absolute;
  top: 30px;
  left: 64px;
  background-repeat: no-repeat;
  background-position: center;
  background-image: url(../images/logo.svg);
  background-size: contain;
  z-index: 100;
}
.header__title {
  width: 730px;
  position: relative;
  left: 64px;
  line-height: 96px;
  font-size: 102px;
  font-weight: bold;
  align-self: center;
}
.header__subtitle {
  position: absolute;
  z-index: 100;
  width: 388px;
  bottom: 30px;
  left: 64px;
  line-height: 25px;
  font-size: 18px;
  font-weight: normal;
}

.header__link {
  text-decoration: none;
  color: #2f80ed;
  opacity: 1;
}
.header__link:hover {
  opacity: 0.5;
}
.header__main-illustration {
  width: 765px;
  height: 608px;
  position: absolute;
  right: 0px;
  bottom: 0px;
  background-size: cover;
  z-index: 101;
}

.header__square-pic {
  height: 568px;
  width: 568px;
  background-color: #2f80ed;
  position: absolute;
  top: 64px;
  right: 0px;
  transform: rotate(-15deg);
  animation: movesquare 20s infinite linear forwards;
}

@keyframes movesquare {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.two-columns {
  display: flex;
  width: 80%;
  margin: 100px auto 0 auto;
  justify-content: space-between;
}
.two-columns__brief {
  width: 175px;
  float: left;
  line-height: 1.2;
  font-size: 18px;
  font-weight: normal;
  color: #2f80ed;
}
.two-columns__main-text {
  width: 80%;
  min-width: 784px;
  float: right;
}
.two-columns__paragraph {
  margin-bottom: 30px;
  line-height: 34px;
  font-size: 24px;
  font-weight: normal;
}

.two-columns__span-accent {
  font-weight: bold;
}

.technics {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.section-title {
  width: 60%;
  font-size: 60px;
  text-align: center;
  line-height: 69px;
  margin-top: 100px;
  margin-bottom: 20px;
  font-weight: bold;
  z-index: 1;
}
.section-subtitle {
  width: 60%;
  font-size: 24px;
  font-weight: normal;
  text-align: center;
  line-height: 34px;
  z-index: 1;
}

.cards {
  display: flex;
  width: 920px;
  margin: auto;
  flex-wrap: wrap;
  padding-top: 60px;
}

.cards__item {
  width: 240px;
  box-sizing: border-box;
  margin-right: 100px;
  margin-bottom: 60px;
  text-align: center;
}
.cards__item:nth-child(3) {
  margin-right: 0;
}
.cards__item:nth-child(4) {
  margin-bottom: 0;
}
.cards__item:nth-child(5) {
  margin-bottom: 0;
}
.cards__image {
  border-radius: 90%;
  width: 160px;
  height: 160px;
  margin: 0px 40px 43px 40px;
}
.cards__title {
  text-align: center;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 16px;
  line-height: 1.15;
}
.cards__description {
  line-height: 23px;
  font-size: 18px;
  font-weight: normal;
  text-align: center;
}
.video {
  display: flex;
  margin: auto;
  flex-direction: column;
  align-items: center;
}
.video__iframes {
  display: flex;
  justify-content: space-around;
  margin: auto;
  position: relative;
  bottom: -50px;
  z-index: 101;
}
.video__iframe {
  margin-right: 20px;
  width: 560px;
  height: 315px;
}
.video__iframe:nth-child(2) {
  margin-right: 0;
}

.oakley {
  display: flex;
  padding-top: 60px;
  padding-bottom: 80px;
  background-color: #f2f2f2;
}
.feinman {
  display: flex;
  background-color: #f2f2f2;
  height: 790px;
  position: relative;
  margin: 0 auto 0 auto;
  flex-direction: column;
  align-items: center;
}
.feinman__title {
  width: 648px;
  text-align: center;
  font-size: 120px;
  padding-bottom: 70px;
  margin: 0;
  z-index: 2;
  line-height: 1.15;
  font-size: 120px;
  font-weight: bold;
}
.feinman__subtitle {
  text-align: center;
  z-index: 3;
  line-height: 51px;
  font-size: 36px;
  font-weight: normal;
  text-align: center;
  margin: 0;
}
.feinman__link {
  text-decoration: none;
  color: #000;
  position: absolute;
  right: 48px;
  top: 50%;
  line-height: 51px;
  font-size: 36px;
  font-weight: normal;
}
.feinman__link:hover {
  opacity: 0.5;
}
.feinman__illustration {
  position: absolute;
  width: 867px;
  height: 637px;
  bottom: 0px;
  left: 0px;
  z-index: 1;
}
.digits {
  display: flex;
  margin: auto;
  flex-direction: column;
  align-items: center;
}
.section-title {
  width: 60%;
  font-size: 60px;
  text-align: center;
  line-height: 69px;
  margin-top: 100px;
  margin-bottom: 20px;
  font-weight: bold;
}
.section-subtitle {
  width: 60%;
  font-size: 24px;
  font-weight: normal;
  text-align: center;
  line-height: 34px;
}
.table {
  display: flex;
  justify-content: space-between;
  width: 1100px;
  margin-bottom: 100px;
  margin-top: 60px;
}

.table__cell {
  width: 250px;
}
.table__heading {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 20px;
  line-height: 1.15;
}
.table__text {
  line-height: 1.2;
  font-size: 18px;
  font-weight: normal;
}

.khan {
  display: flex;
  justify-content: space-between;
  background-color: #f2f2f2;
  padding-top: 5px;
}
.khan__container {
  width: 80%;
  margin: 105px auto 0 auto;
}
.khan__author {
  margin: 0;
  line-height: 42px;
  font-size: 30px;
  font-weight: normal;
}
.khan__title {
  margin: 0;
  line-height: 1.15;
  font-size: 60px;
  font-weight: bold;
}
.khan__quote {
  width: 790px;
  margin-top: 50px;
  margin-bottom: 36px;
  line-height: 34px;
  font-size: 24px;
  font-weight: normal;
}
.khan__quote-author {
  margin-bottom: 10px;
  line-height: 1.15;
  font-size: 24px;
  font-weight: bold;
}
.khan__quote-author-subline {
  margin: 0 0 68px 0;
  line-height: 1.15;
  font-size: 24px;
  font-weight: normal;
}
.khan__book-container {
  display: flex;
  justify-content: flex-start;
}
.khan__book-pic {
  width: 620px;
  height: 608px;
  margin-right: 20px;
  object-fit: cover;
  object-position: 0px 0px;
}
.khan__buy-link {
  text-decoration: none;
  line-height: 42px;
  font-size: 30px;
  font-weight: normal;
  color: #2f80ed;
}
.khan__buy-link:hover {
  opacity: 0.5;
}

.kaufman {
  display: flex;
  flex-direction: column;
  position: relative;
  align-items: center;
  background-color: #1f1f1f;
  overflow: hidden;
}
.kaufman__triangle {
  position: absolute;
  width: 877px;
  height: 877px;
  right: -210px;
  background-size: cover;
  animation: movetriangle 20s infinite linear forwards;
}

@keyframes movetriangle {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
.section-title_theme_dark {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 60%;
  margin-bottom: 20px;
  margin-top: 90px;
  line-height: 69px;
  font-size: 60px;
  font-weight: bold;
  text-align: center;
  color: #f2f2f2;
}
.section-subtitle_theme_dark {
  width: 60%;
  text-align: center;
  line-height: 34px;
  font-size: 24px;
  font-weight: normal;
  color: #f2f2f2;
}
.table_theme_dark {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  width: 1100px;
  margin-bottom: 90px;
  margin-top: 80px;
  z-index: 2;
}

.table__cell_theme_dark {
  width: 200px;
  color: white;
}
.table__heading_theme_dark {
  margin-bottom: 20px;
  font-size: 24px;
  font-weight: bold;
  line-height: 1.15;
}
.table__text_theme_dark {
  line-height: 1.2;
  font-size: 18px;
  font-weight: normal;
}

.resources {
  display: flex;
  margin: 0 auto 0 auto;
  flex-direction: column;
  align-items: center;
}
.resources__logo-zone {
  margin: 80px auto 217px auto;
  width: 1100px;
}
.resources__logo {
  width: 270px;
  height: 38px;
}

.footer {
  background-color: #1f1f1f;
  padding: 60px 0 40px 0;
}

.footer__columns {
  display: flex;
  position: relative;
  width: 90%;
  margin: auto;
  justify-content: space-between;
  min-height: 350px;
}

.footer__column_content_copyright {
  flex-basis: 711px;
}
.logo_place_footer {
  display: flex;
  width: 183px;
  height: 35px;
  position: absolute;
  background-repeat: no-repeat;
  background-position: center;
  background-image: url(../images/logo_white.svg);
  background-size: contain;
  z-index: 100;
  margin: 0;
  padding: 0;
}
.footer__author {
  position: absolute;
  color: #f2f2f2;
  font-size: 18px;
  font-weight: normal;
  line-height: 25px;
  padding-top: 18px;
  padding-bottom: 18px;
  bottom: 18px;
}

.footer__column-heading {
  color: #f2f2f2;
  line-height: 30px;
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 20px;
  margin: 0;
  padding: 0;
}

.footer__column-link {
  text-decoration: none;
  color: #f2f2f2;
  display: block;
  line-height: 30px;
  font-size: 18px;
  font-weight: normal;
  text-align: justify;
}
.footer__column-link:hover {
  opacity: 0.5;
}

.footer__social-icon {
  display: inline;
  margin-right: 5px;
  width: 16px;
  height: 16px;
}