:root {
  --header-menu-color: #565656;
  --banner-color: #C9C9C9;
  --desc-color: #A3A3A3;
  --title-desc-color: #5C5C5C;
  --card-text-color: #D9D9D9;

  --default-color: #5643CD;
  --default-color-light: #F6F0FF;
  --yellow-color: #FFF496;
  --pink-color: #FF8080;

  --font-size10 : 0.625rem;
  --font-size12 : 0.75rem;
  --font-size13 : 0.813rem;
  --font-size16 : 1rem;
  --font-size18 : 1.125rem;
  --font-size20 : 1.25rem;
  --font-size25 : 1.563rem;
  --font-size28 : 1.75rem;
  --font-size48 : 3rem;

  --font-weight-black : 900;
  --font-weight-semibold : 600;
  --font-weight-medium : 500;

  --letter-spacing-1px : -1px;
  --letter-spacing-06px : -0.6px;
  --letter-spacing-03px : -0.3px;
  --letter-spacing-2p : -0.9px;
  --letter-spacing-3p : -0.5px;
  --letter-spacing-7p : -1.7px;
  --letter-spacing-5p : -0.8px;
}

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

html {
  font-size: 16px;
}

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr,
acronym, address, big, cite, code, del, dfn, em, img, ins,
kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b,
u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas,
details, embed, figure, figcaption, footer, header, hgroup, menu,
nav, output, ruby, section, summary, time, mark, audio, video, button, input, select {
  font-family: 'NotoSansKR', sans-serif;
  font-weight: 400;
}

body {
  margin: 0 auto;
  width: 100%;
  max-width: 1920px;
}

header,
section,
footer {
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
}

footer {
  display: flex;
  height: 7.5rem;
  padding: 1.938rem 2.25rem 1.938rem 5rem;
  gap: 3.125rem;
  align-items: center;
  background: linear-gradient(90deg, var(--pink-color) 0%, #E25EB5 45%, #9484F5 100%);
}

footer > .img_wrap {
  width: 20.688rem;
}

footer > .img_wrap > img {
  width: 100%;
}

footer > .footer_info {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
}

footer > .footer_info > p,
footer > .footer_info span {
  font-size: var(--font-size20);
  font-weight: bold;
  letter-spacing: var(--letter-spacing-2p);
  color: #fff;
}

.img_rendering, img {
  image-rendering: -moz-crisp-edges; /* Firefox */ 
  image-rendering: -o-crisp-edges; /* Opera */ 
  image-rendering: -webkit-optimize-contrast;/* Webkit (non-standard naming) */ 
  image-rendering: crisp-edges; 
  -ms-interpolation-mode: nearest-neighbor; /* IE (non-standard property) */
}
.desktop_show {
  display: none;
}

.mobile_show {
  display: none;
}

/* Main */
.content_main {
  width: 100%;
}

.content_main section,
.content_main section>img,
footer > img {
  width: 100%;
}

.content_main #banner .swiper-slide {
  width: 100%;
}

.content_main #banner .swiper-slide > img {
  width: 100%;
}

/* our content */
#our_content {
  padding: 10rem 5rem;
}

#our_content > .title_wrap > h3 {
  text-align: center;
  font-size: var(--font-size48);
  font-weight: var(--font-weight-black);
  letter-spacing: var(--letter-spacing-2p);
}

#our_content > .title_wrap > h3 > span {
  font-weight: var(--font-weight-black);
  letter-spacing: var(--letter-spacing-2p);
  color: var(--default-color);
}

#our_content > .title_wrap > p {
  margin-top: 2.813rem;
  font-size: var(--font-size25);
  font-weight: var(--font-weight-medium);
  text-align: center;
  color: var(--title-desc-color);
  letter-spacing: var(--letter-spacing-2p);
}

#our_content > ul {
  display: flex;
  margin-top: 9rem;
  gap: 0 9.5%;
  justify-content: center;
}

#our_content > ul > li {
  display: flex;
  flex-direction: column;
  align-items: center;
  list-style: none;
}

#our_content > ul > li > i {
  display: block;
  width: 9.375rem;
  height: 9.375rem;
  margin-bottom: 2.188rem;
}

#our_content > ul > li > i > img {
  width: 100%;
}

#our_content > ul > li > strong {
  margin-bottom: 0.938rem;
  font-size: var(--font-size25);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  letter-spacing: var(--letter-spacing-2p);
}

#our_content > ul > li > p {
  font-size: var(--font-size18);
  font-weight: var(--font-weight-medium);
  text-align: center;
  color: var(--title-desc-color);
  letter-spacing: var(--letter-spacing-3p);
}

/* recommend content */
#recommend_content {
  display: flex;
  padding: 8.375rem 5rem;
  justify-content: center;
  background-color: var(--default-color-light);
}

#recommend_content > div {
  width: 100%;
  max-width: 95rem;
  padding-left: 2%;
}

#recommend_content > div > h3 {
  margin-bottom: 3.313rem;
  font-size: var(--font-size28);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-1px);
}

#recommend_content ul {
  display: flex;
  width: auto;
  margin-left: 2.625rem;
  gap: 2.313rem;
}

#recommend_content ul > li {
  display: flex;
  max-width: 16.188rem;
  height: 19.563rem;
  position: relative;
  flex-direction: column;
  border-radius: 20px;
  list-style: none;
  overflow: hidden;
  flex-shrink: inherit;
}

#recommend_content ul > li > .img_wrap {
  width: 100%;
  height: 10rem;
  position: relative;
}

#recommend_content ul > li > .img_wrap > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#recommend_content ul > li > .img_wrap > .instructor {
  position: absolute;
  width: 3.75rem;
  height: 3.75rem;
  right: 1.25rem;
  bottom: -2rem;
}

#recommend_content ul > li > .img_wrap > .instructor > img {
  width: 100%;
}

#recommend_content ul > li > .text_wrap {
  display: grid;
  height: 100%;
  padding: 1.3rem 1.25rem;
  background-color: #242730;
  grid-template-rows: auto auto 1fr;
}

#recommend_content ul > li > .text_wrap > p.instructor_name {
  margin-bottom: 0.75rem;
  font-size: var(--font-size13);
  font-weight: var(--font-weight-medium);
  color: var(--card-text-color);
}

#recommend_content ul > li > .text_wrap > p.title {
  font-size: var(--font-size16);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-1px);
  color: #fff;
}

#recommend_content ul > li > .text_wrap > p.tag {
  display: flex;
  align-items: flex-end;
  font-size: var(--font-size12);
  letter-spacing: var(--letter-spacing-06px);
  color: var(--card-text-color);
}

#recommend_content ul > li > .tag {
  position: absolute;
  width: 2.875rem;
  height: 1.25rem;
  top: 0.625rem;
  right: 0.625rem;
  padding-top: 1px;
  background-color: rgb(36 39 48 / 50%);
  border-radius: 7px;
  font-size: var(--font-size10);
  font-weight: var(--font-weight-medium); 
  text-align: center;
  color: #fff;
  letter-spacing: var(--letter-spacing-03px);
}

/* content video */
#content_video_section {
  padding: 9.896% 5rem;
}

#content_video_section > div {
  width: 84.063rem;
  max-width: 100%;
  margin: auto;
}

#content_video_section > div > .content_title {
  display: flex;
  margin-bottom: 36px;
}

#content_video_section > div > .content_title > h3 {
  font-size: 25px;
  font-weight: 900;
  color: #272727;
  letter-spacing: var(--letter-spacing-7p);
}

#content_video_section > div > .content_title > i {
  display: block;
  width: 1px;
  height: 25px;
  margin-right: 11px;
  margin-left: 13px;
  margin-top: 5px;
  background-color: #BBBBBB;
}

#content_video_section > div > .content_title > p {
  font-size: 25px;
  font-weight: 500;
  color: #4B4B4B;
  letter-spacing: var(--letter-spacing-7p);
}

#content_video_section > div > .video_wrap {
  width: 100%;
  border-radius: 20px;
  overflow: hidden;
}

#content_video_section > div > .video_wrap > video {
  width: 100%;
  height: 100%;
}

#content_video_section > div > .video_wrap > img {
  width: 100%;
}

#content_video_section > div > .video_contents {
  display: flex;
  margin-top: 3.5rem;
  gap: 1.313rem;
}

#content_video_section > div > .video_contents > button {
  width: 20.063rem;
  border: 0;
  background-color: transparent;
  cursor: pointer;
  transition: filter 0.3s ease, opacity 0.3s ease, transform 0.1s ease;
}

#content_video_section > div > .video_contents > button.cover_hidden {
  display: none;
}

#content_video_section > div > .video_contents > button.dimmed {
  filter: brightness(0.6);
}

#content_video_section > div > .video_contents > button > img {
  width: 100%;
}

#content_video_section > div >.content_btns {
  margin-top: 6.875rem;
  text-align: center;
}

#content_video_section > div >.content_btns > a {
  display: inline-flex;
  width: 11.563rem;
  height: 3.625rem;
  color: var(--default-color);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size16);
  background: #fff;
  border: 1px solid #CECECE;
  border-radius: 10px;
  letter-spacing: var(--letter-spacing-5p);
  text-decoration: none;
  align-items: center;
  justify-content: center;
  padding-bottom: 2px;
}

#content_video_section > div >.content_btns > a > img {
  width: 6px;
  margin-left: 0.75rem;
}



/* content instructor */
#content_instructor {
  padding: 17.063rem 5rem;
  background-color: #000;
}

#content_instructor > div {
  width: 96.188rem;
  max-width: 100%;
  margin: auto;
}

#content_instructor > div > p {
  font-size: var(--font-size48);
  font-weight: bold;
  letter-spacing: var(--letter-spacing-2p);
  background: linear-gradient(90deg, var(--pink-color) 0%, var(--default-color) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  text-align: center;
}

#content_instructor ul {
  display: flex;
  width: auto;
  margin-top: 5.938rem;
  gap: 2.063rem;
}

#content_instructor ul > li {
  max-width: 30.688rem;
  list-style: none;
  flex-shrink: inherit;
}

#content_instructor ul > li > img {
  width: 100%;
}

/* our expert */
#our_expert {
  padding: 17rem 5rem;
  background-color: #FBFBFB;
}

#our_expert > div {
  margin: auto;
  width: 95.75rem;
  max-width: 100%;
}

#our_expert > div > h3,
#our_expert > div > h3 > span {
  margin-bottom: 2.313rem;
  font-size: var(--font-size48);
  text-align: center;
  font-weight: var(--font-weight-black);
  letter-spacing: var(--letter-spacing-2p);
}

#our_expert > div > p,
#our_expert > div > p > span {
  font-size: var(--font-size25);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-2p);
  text-align: center;
  color: var(--title-desc-color);
}

#our_expert > div > h3 > span,
#our_expert > div > p > span {
  color: var(--pink-color);
}

#our_expert > div > ul {
  display: flex;
  margin-top: 9.25rem;
  gap: 4rem;
}

#our_expert > div > ul > li {
  width: 29.25rem;
  height: 30.438rem;
  padding: 2.563rem 2.375rem;
  position: relative;
  list-style: none;
  background: #fff;
  box-shadow: 0px 4px 10px rgb(0 0 0 / 25%);
  border-radius: 20px;
}

#our_expert > div > ul > li > h6 {
  margin-bottom: 1.813rem;
  font-size: var(--font-size25);
  font-weight: bold;
  letter-spacing: var(--letter-spacing-2p);
  color: var(--pink-color);
}

#our_expert > div > ul > li > .text_wrap.margin {
  margin-top: 1.938rem;
}

#our_expert > div > ul > li > .text_wrap > p.title {
  font-size: var(--font-size20);
  color: #050505;
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-2p);
}

#our_expert > div > ul > li > .text_wrap > p.text {
  font-size: var(--font-size20);
  color: var(--title-desc-color);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-2p);
}

#our_expert > div > ul > li > .img_wrap {
  position: absolute;
  bottom: 1.938rem;
  right: 2.563rem;
  width: 12.732%;
}

#our_expert > div > ul > li > .img_wrap > img {
  width: 100%;
}

@media screen and (max-width: 1680px) {
  html {
    font-size: 100%;
  }
}

@media screen and (max-width: 1280px) {
  html {
    font-size: 87.5%;
  }
}

@media screen and (max-width: 1024px) {
  html {
    font-size: 20px;
  }

  footer {
    height: 7.8rem;
    padding: 1.3rem 1.5rem;
    gap: 0.7rem;
    flex-direction: column;
    align-items: flex-end;
  }

  footer > .footer_info {
    flex-direction: column;
    align-items: flex-end;
  }

  footer > .img_wrap {
    width: 8rem;
  }

  footer > .footer_info > p,
  footer > .footer_info span {
    text-align: right;
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    line-height: 1.2rem;
    letter-spacing: var(--letter-spacing-5p);
  }

  .desktop_show {
    display: none;
  }

  .mobile_show {
    display: block;
  }

  /* our content */
  #our_content {
    padding: 6.2rem 4.5rem;
  }

  #our_content > .title_wrap > h3 {
    font-size: 1.5rem;
  }

  #our_content > .title_wrap > p {
    margin-top: 0.8rem;
    font-size: 0.9rem;
  }

  #our_content > ul {
    display: grid;
    width: fit-content;
    margin: auto;
    margin-top: 4.9rem;
    gap: 2.9rem;
    grid-template-columns: 1fr 1fr;
    justify-items: center;
  }

  #our_content > ul > li {
    width: 11.6rem;
  }

  #our_content > ul > li > i {
    width: 5.4rem;
    height: 5.4rem;
    margin-bottom: 1rem;
  }

  #our_content > ul > li > strong {
    font-size: 1.2rem;
    margin-bottom: 0.2rem;
  }

  #our_content > ul > li > p {
    font-size: 0.8rem;
  }

  /* recommend content */
  #recommend_content {
    padding: 6.5rem 0;
  }

  #recommend_content > div {
    padding: 0;
  }

  #recommend_content > div > h3 {
    padding-left: 3.1rem;
    margin-bottom: 1.4rem;
    font-size: 1rem;
  }

  #recommend_content > div > div {
    padding-left: 3.1rem;
  }

  #recommend_content ul {
    width: 100%;
    margin-left: 0.6rem;
    gap: 0;
  }

  #recommend_content ul > li {
    height: 14.6rem;
    flex-shrink: 0;
    border-radius: 10px;
  }

  #recommend_content ul > li > .img_wrap {
    height: 5.8rem;
  }

  #recommend_content ul > li > .img_wrap > .instructor {
    width: 2rem;
    height: 2rem;
    top: 4.9rem;
    right: 0.7rem;
  }

  #recommend_content ul > li > .text_wrap {
    padding: 1.3rem 1rem 0.7rem 1rem;
  }

  #recommend_content ul > li > .text_wrap > p.instructor_name {
    margin-bottom: 0.3rem;
    font-size: 0.7rem;
  }

  #recommend_content ul > li > .text_wrap > p.title {
    font-size: 1rem;
    line-height: 1.2rem;
  }

  #recommend_content ul > li > .text_wrap > p.tag {
    font-size: 0.6rem;
  }

  #recommend_content ul > li > .tag {
    width: 1.58rem;
    height: 0.68rem;
    padding-top: 0;
    font-size: 0.4rem;
  }

  /* content video */
  #content_video_section {
    padding: 8rem 3.1rem;
  }

  #content_video_section > div > .content_title {
    margin-bottom: 1.7rem;
  }

  #content_video_section > div > .content_title > h3,
  #content_video_section > div > .content_title > p {
    font-size: 1rem;
    letter-spacing: var(--letter-spacing-1px);
  }

  #content_video_section > div > .content_title > i {
    height: 0.9rem;
    margin-right: 6px;
    margin-left: 10px;
  }

  #content_video_section > div > .video_wrap {
    border-radius: 0.5rem;
  }

  #content_video_section > div > .video_contents {
    margin-top: 1.2rem;
    gap: 0.4rem;
  }

  #content_video_section > div > .video_contents > button {
    border-radius: 3px;
    overflow: hidden;
  }

  #content_video_section > div >.content_btns {
    margin-top: 4.5rem;
  }

  #content_video_section > div >.content_btns > a {
    width: 7.1rem;
    height: 1.8rem;
    border-radius: 0.3rem;
    font-size: 0.8rem;
  }

  #content_video_section > div >.content_btns > a > img {
    margin-left: 0.3rem;
  }

  /* content instructor */
  #content_instructor {
    padding: 9.7rem 0;
  }

  #content_instructor > div > p {
    font-size: 1.5rem;
  }

  #content_instructor > div > div {
    padding-left: 3.7rem;
  }

  #content_instructor ul {
    gap: 0;
  }

  #content_instructor ul > li {
    flex-shrink: 0;
    border-radius: 20px;
    overflow: hidden;
  }

  /* our expert */
  #our_expert {
    padding: 7.5rem 1.6rem;
  }

  #our_expert > div > h3, #our_expert > div > h3 > span {
    font-size: 1.5rem;
    margin-bottom: 1.3rem;
  }

  #our_expert > div > p, #our_expert > div > p > span {
    font-size: 0.9rem;
  }

  #our_expert > div > ul {
    margin-top: 4.6rem;
    gap: 2.8rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  #our_expert > div > ul > li {
    width: 23.9rem;
    height: 14.5rem;
    padding: 1.4rem 4rem 2.1rem 2rem;
    border-radius: 15px;
  }

  #our_expert > div > ul > li > h6 {
    margin-bottom: 1.1rem;
    font-size: 1.2rem;
  }

  #our_expert > div > ul > li > .text_wrap > p.title,
  #our_expert > div > ul > li > .text_wrap > p.text {
    font-size: 0.9rem;
  }

  #our_expert > div > ul > li > .text_wrap.margin {
    margin-top: 0.8rem;
  }

  #our_expert > div > ul > li > .img_wrap {
    width: 2.4rem;
    height: 2.4rem;
    bottom: 0.8rem;
    right: 1.1rem
  }

  #our_expert > div > ul > li > .img_wrap.big_icon {
    width: 3.3rem;
    height: 3.3rem;
  }
}

@media screen and (max-width: 760px) {
  html {
    font-size: 16px;
  }
}

@media screen and (max-width: 600px) {
  html {
    font-size: 87.5%;
  }
}

@media screen and (max-width: 480px) {
  html {
    font-size: 62.5%;
  }
}