@font-face {
  font-family: "TmonMonsori";
  src: url("../fonts/TmonMonsori.woff") format("woff");
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: "GmarketSansMedium";
  src: url("https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_2001@1.1/GmarketSansMedium.woff")
    format("woff");
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: "S-CoreDream-3Light";
  src: url("https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_six@1.2/S-CoreDream-3Light.woff")
    format("woff");
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: "S-CoreDream-5Medium";
  src: url("https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_six@1.2/S-CoreDream-5Medium.woff")
    format("woff");
  font-weight: 500;
  font-style: normal;
}

* {
  margin: 0;
  padding: 0;
  font-stretch: ultra-condensed !important;
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background-color: rgba(119, 119, 204, 0.15);
  border-radius: 8px;
}

::-webkit-scrollbar-thumb {
  background: #f7c9dd;
  border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(119, 119, 204, 1);
}

@keyframes opacityLoop {
  0% {
    opacity: 1;
  }

  30% {
    opacity: 0;
  }

  70% {
    opacity: 0.5;
  }

  100% {
    opacity: 0;
  }
}

.pointPur {
  color: #7777cc;
}

body {
  background-color: #f4f4f5;
  font-family: "S-CoreDream-3Light", sans-serif;
  line-height: 1.5em;
  letter-spacing: -0.5px;
}

strong {
  font-weight: 700;
  /* color: #111; */
  font-family: "S-CoreDream-5Medium";
}

del {
  color: #ccc;
}

/* li{
    font-family:'Noto Sans KR' ;
} */
h1,
h2 {
  font-family: "GmarketSansMedium", "TmonMonsori", sans-serif;
  color: #333;
  font-weight: 900;
}

h2::before {
  display: inline-block;
  content: "💡  ";
  /* margin-right: 10px; */
  font-weight: 700;
  animation: opacityLoop 1s ease-out infinite alternate;
}

h2:hover::before {
  animation-play-state: paused;
}

h3,
h4 {
  font-family: "GmarketSansMedium", "S-CoreDream-5Medium", sans-serif;
  /* font-family: 'Noto Sans KR', sans-serif; */
  font-weight: 700px;
  padding-bottom: 10px;
}

h3 {
  color: #66f;
}

h4 {
  text-align: center;
  font-size: 18px;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: #333;
}
.s-txt {
  font-size: 14px;
}
.goTo {
  text-decoration: underline;
  color: #0000ff;
  font-weight: bold;
  font-size: 14px;
}
.pointRed {
  color: red;
}
#wrap {
  width: 100%;
  overflow: hidden;
}

#wrap .center {
  width: calc(100% - 40px);
  min-width: 320px;
  max-width: 1440px;
  margin: 0 auto;
  position: relative;
}

#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.9);
  /* background-color: rgba(0, 0, 0, 0.8); */
  z-index: 9999;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  /* border-bottom: 1px solid rgba(255, 255, 255, 0.4); */
}

#header h1 {
  padding-top: 10px;
  text-align: center;
}

#header #gnb {
  text-align: center;
}

#header #gnb a {
  margin: 0 18px;
  font-weight: bold;
  color: #66f;
  font-family: "GmarketSansMedium";
}

section {
  /* height: 90vh; */
  clear: both;
}

img {
  max-width: 100%;
}

section h2 {
  padding: 30px 0 20px;
  font-size: 1.85em;
}

#section0 {
  padding: 0;
}

#section0 .center {
  padding-top: 100px;
  line-height: 1em;
  /* width: 100%; */
}

#section0 .center img {
  border-radius: 10px;
}

#section1 {
  background: linear-gradient(transparent 50%, rgb(186, 227, 249) 80%);
  /* min-height: 930px; */
  padding-bottom: 0;
}

#section1 h2 {
  /* color: #fff; */
}

/* 뒤집기 */
.flip3D > .front {
  position: absolute;
  /* transform: perspective( 600px ) rotateY( 0deg ); */
  background: #fff;
  box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.16);
  width: 360px;
  min-height: inherit;
  border-radius: 10px;
  backface-visibility: hidden;
  /* padding-bottom: 80px; */
  /* transition: filter 0.3s linear; */
}
.flip3D > .front .btn-box {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 8px;
  padding: 16px 16px 32px;
}
.flip3D button,
.flip3D a.buy-ebook {
  background-color: #eee;
  color: #333;
  font-size: 0.9em;
  font-weight: bold;
  border-radius: 10px;
  border: 0;
  /* position: absolute; */
  box-shadow: 1px 1px 4px #999;
}

.flip3D > .front .btn-box > button,
.flip3D > .front .btn-box > a {
  /* width: 100%; */
  padding: 7px 10px;
  font-weight: 700;
  flex: 1 1 auto;
}

/* .flip3D>.front button.index-list {
    left: 20px;
    bottom: 20px;
} */

/* .flip3D>.front>a.buy-ebook {
    position: absolute;
    right: 20px;
    bottom: 20px;
    letter-spacing: -0.5px;
} */

.flip3D > .front > button:hover,
.flip3D > .front > a:hover {
  background-color: #66f;
  color: #fff;
  transition: all 0.3s ease-in-out;
}

.flip3D > .back {
  position: absolute;
  opacity: 0;
  z-index: -999;
  /* transform: perspective( 900px ) rotateY( 180deg ); */
  transition: opacity 0.3s ease-in-out;
  background: rgba(186, 227, 249, 0.85);
  border-radius: 10px;
  width: 360px;
  padding: 20px;
  padding-bottom: 100px;
  box-sizing: border-box;
  backface-visibility: hidden;
  /* transition: transform 0.3s linear; */
  overflow: hidden;
}

.flip3D > .back .scroll-box {
  width: 330px;
  height: 640px;
  overflow-x: hidden;
  overflow-y: auto;
  border-radius: 10px;
}
.flip3D > .back .scroll-box::-webkit-scrollbar {
  width: 5px;
}
.flip3D > .back p {
  margin-bottom: 15px;
  color: #333;
  font-size: 14px;
}

.flip3D > .back p::first-line {
  font-size: 1.15em;
  text-align: center;
  line-height: 1.75em;
  color: #000;
}

.flip3D > .back > button {
  position: absolute;
  right: 30px;
  bottom: 20px;
  padding: 10px 13px;
  border-radius: 30px;
}

/*
.flip3D:hover > .front{
    /* transform: perspective( 900px ) rotateY( -180deg ); 
    filter: blur(3px);
} 
.flip3D:hover > .back{
    /* transform: perspective( 900px ) rotateY( 0deg ); 
    opacity: 1;
}
*/
.flip3D > .back > h3 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.5vw;
  /* width: 350px;s */
  text-align: center;
}

#section1 .splide__slide {
  height: 650px;
  position: relative;
}

#section1 .splide__track {
  overflow: visible;
}

section .splide__slide img {
  width: 100%;
  height: auto;
  /* border-radius: 10px 16px 0 0; */
}

#section1 .splide__slide .discription {
  position: relative;
  padding: 10px 20px 0px;
}

#section1 .splide__slide .splide__arrows button {
  background: transparent;
  border: 0;
  outline: 0;
  position: absolute;
  right: 20px;
  bottom: 20px;
  font-size: 1em;
  letter-spacing: -1px;
  color: rgba(102, 102, 255, 0.8);
  font-weight: bolder;
}

#section1 .splide__slide .discription strong {
  font-size: 0.95em;
  color: #666;
}

#section1 .splide__slide .discription h3 {
  padding: 5px 0 0;
  font-size: 1.4em;
  color: #66f;
}

#section1 .splide__slide .discription h4 {
  color: #555;
  font-weight: 500;
  text-align: left;
  font-size: 16px;
}

#section1 .splide__slide .front .discription p {
  font-size: 16px;
  text-align: right;
}

#section1 .splide__slide .discription p::first-line {
  font-size: 0.9em;
  text-align: right;
}

#section1 .splide__slide .front .discription p.price {
  font-family: "GmarketSansMedium";
  font-size: 1.25em;
  line-height: 1.35em;
}
#section1 .splide__slide .front .discription p.price span.s-txt {
  margin-left: 6px;
  color: #555;
}

#section1 .splide__slide .discription details {
  outline: none;
  cursor: pointer;
  font-size: 14px;
}

#section1 .splide__slide .discription details a,
#section1 .splide__slide .discription details summary {
  text-decoration: underline;
  color: #0000ff;
}
#section1 .splide__slide .discription details summary {
  padding-top: 10px;
}

#section1 .splide__slide .discription details summary::marker {
  /* content: '👍   '; */
  margin-right: 10px;
}

#section1 .splide__arrow {
  /* background-color: rgba(119, 119, 204, 1); */
  box-shadow: 1px 1px 2px #ccc;
  transform: translateY(0%);
  width: 40px;
  height: 40px;
  background-color: rgba(102, 102, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 1px 2px 4px rgba(0, 0, 0, 0.1);
}

#section1 .splide__arrow svg {
  width: 1.75em;
  height: 1.75em;
  fill: #fff;
}
#section1 .splide__arrow--prev {
  transform: translateX(-80px);
}
#section1 .splide__arrow--next {
  transform: translateX(80px);
}

/* 학습지원 */
#section2 {
  background: linear-gradient(rgb(186, 227, 249) 50%, rgba(247, 201, 221, 1));
  height: unset;
  padding-bottom: 0;
}
#section2 .byeol-i {
  position: absolute;
  right: -50px;
  bottom: -100px;
  width: 25%;
  min-width: 150px;
  transform: rotate(5deg);
}
#section2 h3 {
  font-size: 22px;
  padding-top: 10px;
}

#section2 .download {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#section2 .download > div {
  margin-bottom: 50px;
}

#section2 .download .flex-layout {
  font-size: 4vw;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: 30px;
  width: 100%;
}

#section2 .download .flex-layout > * {
  width: 100%;
}

#section2 .download .download-source ul {
  /* list-style: circle inside; */
  margin-bottom: 30px;
  /* border: solid #fff;
    border-width: 2px 0; */
}

#section2 .download .download-source ul li {
  padding: 16px 20px;
  /* border-bottom: 1px solid #fff; */
  border: 1px solid #fff;
  margin-bottom: 10px;
  border-radius: 10px;
  background-color: rgba(255, 255, 255, 0.1);
}

#section2 .download .download-source ul li a {
  display: flex;
  justify-content: space-between;
}

#section2 .download .download-source ul li:hover {
  background-color: rgba(255, 255, 255, 1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.16);
}

#section2 .download .download-source ul li a strong {
  color: #555;
}

#section2 .download .download-source ul li:hover a strong {
  color: #111;
}

#section2 .download .download-source ul li a span.direct_row {
  display: inline-block;
  transition: transform 0.2s;
}

#section2 .download .download-source ul li:hover a span.direct_row {
  transform: translateX(7px);
}

#section2 .download .flex-layout .precautions {
  font-size: 14px;
}
#section2 .download .flex-layout .precautions ul li:last-child {
  text-align: center;
}

#section2 .download .flex-layout .precautions-banner {
  padding-top: 16px;
  text-align: center;
}

#section2 .download .flex-layout .precautions-banner img {
  /* max-width: 90%; */
  border-radius: 10px;
}

#section2 .download .flex-layout .precautions-banner:hover img {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.16);
}

#section2 .download .flex-box {
  max-width: 390px;
  width: 50%;
}

#section2 .download .flex-box h4 {
  animation: upDown 0.75s ease-out infinite alternate;
  margin-bottom: 12px;
}

@keyframes upDown {
  0% {
    transform: translateY(0);
  }

  30% {
    transform: translateY(3px);
  }

  100% {
    transform: translateY(-7px);
  }
}

#section2 .download .youtube .jiyul-bg img {
  width: 100%;
  border-radius: 10px;
  padding: 40px 30px;
  box-sizing: border-box;
  border: 1px solid #f4f4f5;
  background-color: #fff;
  box-shadow: 0px 2px 6px rgba(0, 0, 0, 0.1);
}

#section2 .download .youtube .jiyul-bg:hover img {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.16);
}

#section2 .download .youtube .jiyul-bg strong {
  display: block;
  text-align: center;
}

#section3 {
  background: linear-gradient(rgba(247, 201, 221, 1) 50%, #f4f4f5 80%);
}
#section3 h2 + ul {
  margin-bottom: 50px;
}

#section3 ul {
  font-size: 14px;
}

#section3 iframe {
  width: 100%;
}

#section3 .tab {
  width: 100%;
  padding-top: 20px;
  border: 1px solid #f4f4f5;
  background-color: #fff;
  box-shadow: 0px 2px 6px rgba(0, 0, 0, 0.1);
  border-radius: 10px;
}

#section3 .tabs {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

#section3 .tabs li {
  width: unset;
  box-sizing: border-box;
  font-family: "GmarketSansMedium";
  font-weight: 700;
  text-align: center;
  font-size: 26px;
  line-height: 1em;
  color: #a5a5a5;
  padding: 0.75em 2% 8px;
  border-radius: 10px 10px 0 0;
  border-bottom: 5px solid transparent;
  /* margin-bottom: 20px; */
}

#section3 .tabs li.on {
  /* background: rgb(186, 227, 249,1); */
  color: #66f;
  border-bottom: 5px solid #77f;
}

#section3 .tab_con {
  display: none;
  clear: both;
}

#section3 .tab_con.on {
  display: block;
}

#section3 .tab_con a {
  min-height: 50px;
}

#section3 article {
  /* height: 70vh;
    padding: 2em 0; */
  /* border: solid rgba(186, 227, 249,0.3);
    border-width: 3px 0; */
  /* overflow-y: scroll;
    overflow-x: hidden; */
  padding: 30px 0;
}

#section3 article::-webkit-scrollbar {
  width: 7px;
}

#section3 article::-webkit-scrollbar-track {
  background-color: rgba(255, 255, 255, 0.75);
}

#section3 article::-webkit-scrollbar-thumb {
  background: #bae3f9;
  border-radius: 10px;
}

#section3 article::-webkit-scrollbar-thumb:hover {
  background: #66f;
}

#footer {
  width: 100%;
  /* height: 300px; */
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
  font-size: 14px;
  line-height: 2em;
  text-align: center;
  padding: 30px 0;
  clear: both;
  background-color: #fff;
}

#footer .center img {
  opacity: 0.5;
}

/* .notice{ position: relative; height: 100px;} */
.notice .account {
  color: #66f;
  font-size: 16px;
  font-weight: 500;
}

/* .account{ position: absolute; width: 90%; max-width:620px ; top:50%; left: 50%; transform: translate(-50%,-50%); color:#666; } */
#footer address {
  padding-top: 15px;
  color: #5a5a5a;
  margin: 0 9px;
  font-style: normal;
}

#footer span.v_line {
  margin: 0 8px;
}

#footer address,
#footer .notice .account {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
}

#footer p {
  padding-top: 10px;
  font-size: 12px;
  color: #5a5a5a;
}

#footer strong {
  /* color: #fff; */
}

@media screen and (min-width: 320px) {
  #header {
    /*height: 120px;*/
    padding-bottom: 10px;
  }
  #header h1 img {
    height: 30px;
  }

  #header #gnb {
    font-size: 4vw;
  }

  section {
    padding: 100px 0 40px;
  }
  #section0 {
    display: none;
  }
  #section2 .download .flex-box {
    width: 100%;
  }

  #section3 .tabs li {
    font-size: 4vw;
  }
}

@media screen and (min-width: 580px) {
  #header #gnb {
    font-size: 3vw;
  }

  #section2 .download .flex-layout {
    font-size: 1.1em;
  }

  /* #section2 .download .flex-layout .precautions {
        font-size: 0.85em;
    } */

  #section2 .download .flex-box {
    max-width: 390px;
    width: 50%;
  }
}

@media screen and (min-width: 720px) {
  #header {
    height: 80px;
    padding: 0;
  }

  #header h1 {
    float: left;
  }
  #header h1 img {
    height: 40px;
    margin-top: 10px;
  }

  #header #gnb {
    float: right;
    line-height: 80px;
    font-size: 20px;
  }

  section {
    padding: 100px 0;
  }
  #section0 {
    display: block;
  }
  #section3 .tabs li {
    font-size: 22px;
  }
}

@media screen and (min-width: 960px) {
  .center {
    min-width: 960px;
    max-width: 1100px;
  }
}

@media screen and (min-width: 1100px) {
  #section2 .download .flex-layout {
    flex-direction: row;
    gap: 60px;
  }

  #section3 .tabs li {
    font-size: 26px;
  }
}