/*! Global styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: sans-serif;
  color: #f4f4f4;
}
html {
  font-size: 62.5%;
}
body {
  background-color: #161616;
}

/**  HEADER **/

header {
  width: 100%;
  background-color: #1a1e1f;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0px;
  transition: all 0.3s ease;
  z-index: 5;
}

header img {
  width: 182px;
  height: 40px;
  margin-left: calc((100% - 980px) / 2);
  box-sizing: content-box;
}
header.active-header {
  position: sticky;
  top: 0;
  background-color: #222222f2;
}

header .header-nav ul {
  display: flex;
  gap: 40px;
  list-style: none;
  margin-left: calc((100% - 980px) / 2);
  overflow: hidden;
}
header .header-nav .header-items a {
  font-size: 14px;
  text-decoration: none;
  font-weight: 400;
  transition: color 0.2s ease-in;
  outline: none;
}
header .header-nav .header-items .active-item {
  color: #00a3e0;
}
header .header-nav .header-items a:hover {
  color: #00a3e0;
}

.header-item--hidden {
  display: none;
}
/**** COVER *******/

.cover {
  background: url('../assets/images/cover.webp') no-repeat center/cover;
  height: 35.2rem;
  gap: 15px;
  padding: 96px 0px 0px calc((100% - 980px) / 2);
}

.cover h3:first-child {
  font-weight: 900;
  font-size: 4.2rem;
  margin-bottom: 10px;
}
.cover h3:last-child {
  font-weight: 900;
  font-size: 3.4rem;
}

/******? INTRO *******/

.intro {
  background-color: #2b2b2b;
  padding: 56px 0px;
}

.intro h1 {
  width: 980px;
  font-size: 2.8rem;
  font-weight: 400;
  margin: 0 0 43px calc((100% - 980px) / 2);
}

.intro a {
  font-size: 2rem;
  color: #00aef3;
  text-decoration: none;
  cursor: pointer;
  font-weight: 700;
  transition: color 0.4s ease-in-out;
  margin-left: calc((100% - 980px) / 2);
}

.intro a:hover,
.faqs-title a:hover {
  color: gray;
}

/** Courses **/

.courses-flex {
  display: flex;
  justify-content: center;
  margin-bottom: 58px;
}

.courses-container .courses {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 25px 45px;
}

.courses-container .courses .course {
  width: 300px;
  border: 1px solid #555555;
  border-radius: 6px;
  height: min-content;
}

.courses-container .courses .course .text-content {
  padding-left: 22px;
}
.courses-container h6 {
  font-size: 2.4rem;
  color: #dbdbdb;
  margin-block: 3.4rem 6.7rem;
}
.courses-container .course > img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  margin-bottom: 34px;
}

.courses-container .course h5 {
  font-size: 18px;
  font-weight: 700;
  color: #f4f4f4;
  margin-bottom: 25px;
}
.courses-container .course p {
  font-size: 14px;
  color: #f4f4f4;
  margin-bottom: 59px;
}

.courses-container .course .details {
  display: flex;
  align-items: flex-end;
  margin-bottom: 21px;
  gap: 10px;
}
.courses-container .course .details a {
  font-size: 16px;
  color: #00aeef;
  text-decoration: none;
  transition: 0.3s ease;
  cursor: pointer;
}
.courses-container .course .details a:hover {
  color: #0986b3;
}

:focus {
  box-shadow: 0 0 0 1px #ffffff, 0 0 0 3px #116dff;
  z-index: 1;
  padding: 3px;
}

/** Slider **/

.slider {
  position: relative;
  background-color: #2b2b2b;
  padding-block: 34px 36px;
  box-shadow: 0 0 0 !important;
  overflow: hidden;
}

.slider .slides-mask {
  width: 100%;
  height: 224px;
}

.slider h3 {
  font-size: 2.4rem;
  font-weight: 400;
  margin-bottom: 31px;
  margin-left: calc((100% - 980px) / 2);
}

.slider .slide {
  padding-inline: calc((100% - 980px) / 2);
  position: absolute;
  left: 0;
  width: 100%;
  height: 224px;
  display: inline-flex;
  justify-content: space-between;
  align-items: center;
  opacity: 0;
  transition: opacity 1000ms cubic-bezier(0.37, 0, 0.63, 1) !important;
}
.slide-3 {
  justify-content: center !important;
}
.slider .slide--active {
  opacity: 1;
  position: relative;
}

.slider .slide .img-container {
  width: 24.6rem;
  height: 74px;
  display: flex;
  align-items: center;
}

.slider .slide img {
  width: 100%;
}

.slider button {
  position: absolute;
  top: 50%;

  transform: translateY(50%);
  margin: 0 10rem;

  background-color: transparent;
  border: 0;
  cursor: pointer;
}
.slider button:focus {
  box-shadow: 0px 0px !important;
  padding: 0px;
}
.slider .prev-btn {
  z-index: 4;
  left: 0;
}
.slider .next-btn {
  z-index: 4;
  right: 0;
}

.slider button svg {
  width: 18px;
  stroke: rgb(232, 230, 230);
}

.slider .next-btn svg {
  transform: rotate(180deg);
}

.slider button:hover {
  opacity: 0.6;
}
.slider .dots {
  margin-block: -50px 50px;
}
.slider .dots ul {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.slider .dots ul li {
  list-style: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #e8e6e6;
  cursor: pointer;
  z-index: 2;
}

/** FAQ**/
.faqs-container {
  padding: 30px 40px;
  margin: 75px calc((100% - 980px) * 0.5) 32px;
}
.faqs-title {
  display: flex;
  justify-content: space-between;
}

.faqs-title h2 {
  font-size: 2.4rem;
  font-weight: 400;
  line-height: 1.2em;
  margin-bottom: 20px;
}

.faqs-title a {
  font-size: 2rem;
  line-height: 1.4em;
  color: #00aef3;

  text-decoration: none;
  transition: color 0.4s ease;
}

.faq {
  border-bottom: 1px solid #353131;
  height: 80px;
  transition: height 0.1s ease-in;
}

.faq .faq-main {
  display: flex;
  justify-content: space-between;
  padding: 1.5rem 0;
  cursor: pointer;
}
.faq .faq-main h3 {
  font-size: 1.8rem;
  font-weight: 400;
  line-height: 1.2em;
  min-height: 5rem;
  display: flex;
  align-items: center;
}

.faq .accordion-items {
  padding: 0 2px 3rem;
  display: none;
}

.faq .accordion-items h4,
.faq .accordion-items p {
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 2;
  padding-block: 2px 3px;
}

.accordion-items .text-wrapper {
  margin: 33px 0 33px 2.1rem;
}

.text-wrapper span {
  font-weight: 700;
}

/** Active faq **/

.faq.faq--active .accordion-items {
  display: block;
}

.faq .up-arrow {
  display: none;
}

.faq.faq--active .down-arrow {
  display: none;
}
.faq.faq--active .up-arrow {
  display: block;
}

/** Footer **/
footer {
  position: relative;
  display: flex;
  justify-content: space-between;
  background-color: #1a1e1f;
  padding: 64px calc((100% - 980px) / 2) 43px;
}

footer *:focus {
  box-shadow: 0 0 0 !important;
  padding: 0px;
}

footer .tbc-terms img {
  width: 106px;
  height: 30px;
}

footer a {
  text-decoration: none;
}

footer .tbc-terms {
  font-size: 14px;
  line-height: 164%;
}

footer .tbc-terms .copyright {
  margin-block: 27px 18px;
}

.contact {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
}

.contact button {
  border: 0;
  background-color: transparent;
  cursor: pointer;
}

.contact button img {
  width: 39px;
}

#fb-btn {
  margin-right: 10px;
}

.contact .send-us {
  background-color: #00aef3;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
  transition: color 0.4s ease, border-color 0.4s ease, background-color 0.4s ease;

  font-size: 16px;
  line-height: 1.6em;
  padding: 7px 40px;
}

.terms {
  background-color: transparent;
  border: 0;
  cursor: pointer;
  transition: color 0.4s ease;
}
.terms:hover {
  color: gray;
}

.contact .send-us:hover {
  color: #000;
  background-color: rgb(213, 213, 213);
}

/** RULES **/

.rules {
  width: 686px;
  height: 100vh;
  position: fixed;
  top: 0;
  right: 0;
  overflow: hidden scroll;
  z-index: 10;

  display: grid;
  background-color: #2b2b2b;
  padding: 20px 50px 100px;
  transform: translateX(0);
  transition: transform 0.6s ease-in;
  overscroll-behavior-y: contain;
}

.rules::-webkit-scrollbar {
  display: none;
}

.rules p {
  line-height: 1.4em;
  color: #8c8c8c;
}

.rules a {
  color: #8c8c8c;
  text-decoration: none;
}

.rules .header {
  font-size: 22px;
  font-weight: 700;
}

.rules .sub-header {
  font-weight: 700;
  margin-top: 19.6px;
  font-size: 16px;
}

.rules .text {
  margin-top: 19.6px;
  font-size: 14px;
}

.rules img {
  margin-block: 29px 26px;
  justify-self: flex-end;
  cursor: pointer;
}

.rules .close-modal-btn {
  margin-top: 19.6px;
  height: 60px;

  font-size: 16px;
  line-height: 1.4em;
  color: #1c1c1c;
  background-color: #dbdbdb;

  border-radius: 4px;
  border: 0;

  cursor: pointer;
  transition: background-color 0.4s ease, color 0.4s ease;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(22, 22, 22, 0.6);
  z-index: 9;
}

.hidden--rules {
  transform: translateX(100%);
}

.hidden--overlay {
  display: none;
}

.rules .close-modal-btn:hover {
  color: #fff;
  background-color: rgb(0, 174, 243);
}