/*
* Prefixed by https://autoprefixer.github.io
* PostCSS: v8.4.14,
* Autoprefixer: v10.4.7
* Browsers: last 4 version
*/

/* Подключила шрифты */

@font-face {
  font-family: "Roboto";
  src: local("Roboto-Bold"), url("../fonts/Roboto-Bold.woff2") format("woff2"),
    url("../fonts/Roboto-Bold.woff") format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Roboto";
  src: local("Roboto-Regular"),
    url("../fonts/Roboto-Regular.woff2") format("woff2"),
    url("../fonts/Roboto-Regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* Добавила переменные цветов */

:root {
  --accent-color: #3f2aff;
  --active-color: #000;
  --white-text-color: #fff;
  --white-lilac-bg-color: #edf0f9;
  --dark-bg-color: #212133;
  --light-bg-color: #e5e5e5;
  --gray-text-color: #666;
  --steelgray-text-color: #212133;

  /* виньетка */
  --hero-color: radial-gradient(
    44.07% 44.07% at 67.78% 45.93%,
    #555681 0%,
    #212133 100%
  );
  --focus-hover-color: #2a91ff;
  --waterloo-color: #85859b;
  --footer-color: #2e2b44;
}

html {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
}

*,
*::after,
*::before {
  -webkit-box-sizing: inherit;
  box-sizing: inherit;
}

img {
  max-width: 100%;
  height: auto;
}

picture {
  font-size: 0;
  width: 100%;
}

body {
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  min-width: 320px;
  font-family: "Roboto", sans-serif;
}

.margin-reset {
  margin: 0;
}

.link-reset {
  color: inherit;
  text-decoration: none;
}

.list-reset {
  margin: 0;
  padding: 0;
  list-style-type: none;
}

.btn-reset {
  padding: 0;
  border: none;
  background-color: transparent;
  cursor: pointer;
}

.flex {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

.btn {
  border-radius: 20px;
  font-weight: 700;
  font-size: 16px;
  line-height: 19px;
  color: var(--white-text-color);
  background: var(--accent-color);
}

/* отключила стандартный браузерный outline */
.btn:focus {
  outline: none;
}

/* добавила состояния кнопки */

.btn.focus-visible,
.btn:hover {
  background: var(--focus-hover-color);
}

.btn:active {
  background: var(--active-color);
}

.section-title {
  font-weight: 700;
  font-size: 40px;
  line-height: 102%;
}

.descr {
  font-weight: 400;
  font-size: 16px;
  line-height: 150%;
}

.header {
  padding: 27.5px 0;
  background-color: var(--accent-color);
}

.header__left {
  -webkit-box-pack: end;
  -ms-flex-pack: end;
  justify-content: flex-end;
}

.nav__item:not(:last-child) {
  margin-right: 58px;
}

.nav__link {
  position: relative;
  z-index: 1;
  font-weight: 400;
  font-size: 18px;
  line-height: 21px;
  color: var(--white-text-color);
  -webkit-transition: color 0.3s ease-in-out;
  -o-transition: color 0.3s ease-in-out;
  transition: color 0.3s ease-in-out;
}

.nav__link:after {
  content: "";
  position: absolute;
  z-index: -1;
  top: -4px;
  left: -10px;
  right: -10px;
  bottom: -4px;
  border-radius: 20px;
  background-color: var(--focus-hover-color);
  opacity: 0;
  -webkit-transition: opacity 0.3s ease-in-out;
  -o-transition: opacity 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out;
}

.nav__link:focus {
  outline: none;
}

.nav__link.focus-visible::after,
.nav__link:hover::after {
  opacity: 1;
}

.nav__link:active::after {
  background-color: var(--active-color);
  opacity: 1;
}

.hero {
  padding-top: 15px;
  padding-bottom: 12px;
  background: var(--hero-color);
}

.hero__content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: start;
  -ms-flex-align: start;
  align-items: flex-start;
  padding: 113px 0;
}

.hero__title {
  margin-bottom: 30px;
  font-weight: 700;
  font-size: 57px;
  line-height: 104%;
  letter-spacing: 2px;
  color: var(--white-text-color);
}

.hero__descr {
  margin-bottom: 64px;
  font-weight: 400;
  font-size: 18px;
  line-height: 150%;
  color: var(--white-text-color);
}

.hero__btn {
  padding: 24px 79px;
  font-size: 17px;
  line-height: 21px;
}

.hero__img {
  -webkit-box-align: end;
  -ms-flex-align: end;
  align-items: flex-end;
  width: 100%;
  font-size: 0;
}

.hero__img img {
  max-width: 100%;
  height: auto;
}

/* Секция преимущества обучения в skillbox */
.about {
  padding: 80px 0;
  background-color: var(--light-bg-color);
}

.about__img {
  display: block;
  padding-top: 22px;
  font-size: 0;
  width: 100%;
}

.about__img img {
  max-width: 100%;
  height: auto;
}

.about__title {
  margin-bottom: 14px;
  max-width: 380px;
  color: var(--footer-color);
}

.about__descr {
  margin-bottom: 24px;
  max-width: 590px;
  color: var(--gray-text-color);
}

.about__item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: nowrap;
  flex-wrap: nowrap;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.about-item__img {
  margin-right: 30px;
  max-width: 80px;
}

.about-item__descr {
  width: 100%;
  font-weight: 700;
  line-height: 120%;
  color: var(--gray-text-color);
}

/* Секция учителей */

.teachers {
  padding-top: 77px;
  padding-bottom: 72px;
  background-color: var(--dark-bg-color);
}

.teachers__title {
  margin-bottom: 20px;
  color: var(--white-text-color);
}

.teacher-card__ {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: start;
  -ms-flex-align: start;
  align-items: flex-start;
}

.teacher-card__img {
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  margin-bottom: 30px;
  width: 100%;
  background-color: var(--active-color);
}

.teacher-card__title {
  margin-bottom: 10px;
  font-weight: 700;
  font-size: 18px;
  line-height: 150%;
  color: var(--white-text-color);
}

.teacher-card__descr {
  color: var(--waterloo-color);
}

.courses {
  padding-top: 74px;
  padding-bottom: 80px;
}

.courses__title {
  margin-bottom: 24px;
  color: var(--steelgray-text-color);
}

.course-card__body {
  position: relative;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  min-height: 480px;
  border-radius: 20px;
  background-color: var(--white-lilac-bg-color);
}

.course-card:not(:nth-last-child(-n + 2)) {
  margin-bottom: 30px;
}

.course-card__img {
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  width: 100%;
}

.course-card__duration {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  position: absolute;
  top: 10px;
  right: 4px;
}

.duration__img {
  margin-right: 7px;
}

.duration__text {
  display: inline-block;
  font-weight: 400;
  font-size: 16px;
  line-height: 19px;
  color: var(--white-text-color);
}

.course-card__content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: start;
  -ms-flex-align: start;
  align-items: flex-start;
  padding: 30px;
  border-bottom-left-radius: 20px;
  border-bottom-right-radius: 20px;
  min-height: 298px;
  background-color: var(--white-lilac-bg-color);
}

.course-card__title {
  margin-bottom: 7px;
  font-weight: 700;
  font-size: 18px;
  line-height: 150%;
  color: var(--steelgray-text-color);
}

.course-card__descr {
  margin-bottom: auto;
  color: var(--gray-text-color);
}

.course-card__btn {
  padding: 20px 59px;
}

/* Футер */

.footer__top {
  padding-top: 28px;
  padding-bottom: 27px;
  background-color: var(--footer-color);
}

.social {
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.social__item:not(:last-child) {
  margin-right: 30px;
}

.social__link {
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  width: 100%;
  color: #fff;
  -webkit-transition: color 0.3s ease-in-out;
  -o-transition: color 0.3s ease-in-out;
  transition: color 0.3s ease-in-out;
}

.social__link svg {
  position: relative;
  z-index: 1;
  fill: currentColor;
}

.social__link::after {
  content: "";
  position: absolute;
  z-index: 0;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border-radius: 2px;
  background-color: var(--accent-color);
  opacity: 0;
  -webkit-transition: opacity 0.3s ease-in-out;
  -o-transition: opacity 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out;
}

.social__link:focus {
  outline: none;
}

.social__link.focus-visible::after,
.social__link:hover::after {
  opacity: 1;
}

.social__link:active::after {
  opacity: 0;
}

.social__link:active {
  color: var(--accent-color);
}

.footer__bottom {
  background-color: var(--light-bg-color);
}

.footer__text {
  padding-top: 3px;
  font-weight: 400;
  font-size: 12px;
  line-height: 15px;
  text-transform: uppercase;
  text-align: center;
  color: var(--footer-color);
}

.footer__copy {
  display: inline-block;
  color: var(--accent-color);
}

/* Медиа-запросы */

@media (max-width: 992px) {
  .hero {
    padding-top: 16px;
    padding-bottom: 23px;
  }
  .hero__title {
    margin-bottom: 17px;
    font-size: 47px;
  }
  .hero__img {
    margin-bottom: 28px;
    -o-object-fit: cover;
    object-fit: cover;
  }
  .about {
    padding-bottom: 72px;
  }
  .about__item {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: start;
    -ms-flex-align: start;
    align-items: flex-start;
  }
  .about-item__img {
    margin-right: 0;
    margin-bottom: 12px;
  }
  .teachers {
    padding-bottom: 48px;
  }
  .teacher-card:not(:nth-last-child(-n + 2)) {
    margin-bottom: 22px;
  }
  .teacher-card__img {
    margin-bottom: 32px;
  }
  .teacher-card__title {
    margin-bottom: 8px;
  }
  .course-card__body {
    min-height: 556px;
  }
  .course-card__duration {
    right: 9px;
  }
  .course-card__img {
    margin-bottom: 2px;
  }
  .course-card__content {
    min-height: 374px;
  }
  .course-card__btn {
    padding: 20px 56px;
  }
}

/* медиа запрос 767 */
@media (max-width: 767.98px) {
  .header__right {
    padding-bottom: 30px;
    text-align: center;
  }
  .header__left {
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
  }
  .hero {
    padding-bottom: 73px;
  }
  .hero__img {
    display: none;
  }
  .hero__content {
    padding: 62px 0;
  }
  .about__img {
    padding-top: 0;
  }
  .about-item__descr {
    letter-spacing: -1px;
  }
  .teachers {
    padding-bottom: 71px;
  }
  .course-card__body {
    min-height: 653px;
  }
  .course-card__img {
    margin-bottom: 0;
  }
  .course-card__content {
    padding-right: 15px;
    min-height: 473px;
  }
  .course-card__title {
    line-height: 130%;
  }
  .course-card__btn {
    padding: 20px 49px;
  }
}

/* медиа запрос 576 */
@media (max-width: 575.98px) {
  .header {
    padding: 0;
    padding-top: 25px;
    padding-bottom: 25px;
  }

  .header__nav {
    padding: 0;
    overflow-x: scroll;
    overflow-y: hidden;
  }

  .col-6 {
    -webkit-box-flex: 0;
    -ms-flex: none;
    flex: none;
    max-width: 100%;
  }

  .container {
    padding: 0 15px;
  }

  .nav__link {
    white-space: nowrap;
  }

  .nav__list {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: nowrap;
    flex-wrap: nowrap;
    /* gap: 25px; */
    /* max-width: 500px; */
    /* width: 100%;
    padding-bottom: 10px; */
  }
  .header__logo {
    height: 35%;
    width: 35%;
  }

  .hero {
    padding: 50px 0;
  }

  .hero__content {
    padding: 0;
  }

  .hero__title {
    margin-bottom: 5px;
    font-size: 27px;
    line-height: 110%;
    letter-spacing: 0px;
  }

  .hero__descr {
    margin-bottom: 45px;
    font-size: 16px;
    line-height: 130%;
  }

  .hero__btn {
    padding: 20px 54px;
    font-size: 16px;
    line-height: 19px;
  }

  .about {
    padding: 49px 0;
  }

  .about__img {
    display: none;
  }

  .about__title {
    margin-bottom: 2px;
    line-height: 130%;
    font-size: 20px;
  }

  .about__item {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -ms-flex-direction: row;
    flex-direction: row;
    -ms-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-box-align: start;
    -ms-flex-align: start;
    align-items: flex-start;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
  }

  .about__item:not(:last-child) {
    margin-bottom: 30px;
  }

  .about-item__img {
    margin-right: 30px;
    margin-bottom: 0;
  }

  .about-item__descr {
    letter-spacing: 0;
  }

  .teachers {
    padding-top: 45px;
    padding-bottom: 44px;
  }

  .teachers__title {
    font-size: 20px;
  }

  .teacher-card__title {
    margin-bottom: 6px;
  }

  .teacher-card:not(:last-child) {
    margin-bottom: 25px;
  }

  .courses {
    padding-top: 42px;
    padding-bottom: 50px;
  }

  .courses__title {
    font-size: 20px;
  }

  .course-card__title {
    margin-bottom: 10px;
    max-width: 202px;
    line-height: 130%;
  }

  .course-card__btn {
    padding: 20px 56px;
  }

  .course-card:not(:last-child) {
    margin-bottom: 30px;
  }
}