edu/css/intro.css

@charset "UTF-8";

:root {
  /* text - 텍스트 색상 */
  --text-intro-base: #1b1810;
  --text-base: #131313;
  --text-revers: #fff;
  --text-primary: #3c3321;
  --text-secondary: #747474;
  --text-accent: #ff5c00;
  --text-myclass: #ffdf60;
  --text-main-primary: #4a4040;
  --text-main-secondary: #3a200d;
  --text-title-accent: #f5651d;
  --text-pick: #2b5045;
  --text-keyword-base: #c4c2c0;
  --text-keyword-primary: #fff;
  --text-keyword-secondary: #999999;
  --text-video-primary: #b6d5a7;
  --text-video-secondary: #ddd;
  --text-cate-primary: #edd8c2;
  --text-cate-secondary: #b6d5a7;
  --text-cate-tertiary: #e8cfe4;
  --text-comment-primary: #fff;
  --text-comment-secondary: #8d8d8d;
  --text-learning-base: #8d8888;
  --text-learning-primary: #ff5c00;
  --text-learning-secondary: #008c49;
  --text-card-category: #252525;
  --text-card-title-active: #ff7d33;
  --text-card-title-complete: #66ba92;
  --text-card-author: #d1cfcf;
  /* 배경 */
  --bg-base: #e4ddcf;
  --bg-primary: #ece3d2;
  --bg-secondary:
    radial-gradient(93.89% 93.89% at 49.32% 6.11%,
      rgba(255, 255, 255, 0) 0%,
      rgba(255, 255, 255, 0.11) 86.06%,
      rgba(134, 114, 77, 0.2) 88.94%),
    linear-gradient(180deg, #f9f6f0 0%, #e6ddcc 100%);
  --bg-main-card: rgba(255, 255, 255, 0.6);
  --bg-intro-mask: #1b1810;
  --bg-intro: linear-gradient(180deg,
      #f9f5f2 0%,
      #fff 18.77%,
      #fff 41.8%,
      #ece8e4 100%);
  --bg-main:
    linear-gradient(90deg,
      #0f3025 0%,
      #194335 38%,
      #0b221b 87.51%,
      #0d231c 100%) top / 100% 114px no-repeat,
    #ece3d2;
  --bg-video: #1b1b1b;
  --bg-comment: #2a2a2a;
  --bg-nav: linear-gradient(90deg,
      #0f3025 0%,
      #194335 38%,
      #0b221b 87.51%,
      #0d231c 100%);
  --bg-nav-depth: #fff;
  --bg-nav-alerts: #ff2200;
  --bg-nav-alerts-hover: #188f6b;
  --bg-cate-primary: #ded7cf;
  --bg-cate-secondary: #d4decf;
  --bg-cate-tertiary: #e8cfe4;
  --bg-pick: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, #d5ede6 100%);
  --bg-gauge-base: #b4b4b4;
  --bg-gauge-primary: #ff5c00;
  --bg-search: #e4dbc9;
  --bg-keyword-base: rgba(230, 205, 177, 0.3);
  --bg-keyword-primary: #e47703;
  --bg-keyword-primary-hover: #e6cdb1;
  --bg-keyword-secondary: #786c60;
  --bg-keyword-secondary-hover: #dcd3c9;
  --bg-lecture-state: linear-gradient(270deg, #00ab66 0%, #058bb0 100%);
  --bg-lecture-progress-primary: rgba(3, 9, 7, 0.3);
  --bg-lecture-progress-secondary: #07855c;
  --bg-btn-base: #000;
  --bg-btn-primary: #ff5c00;
  --bg-btn-secondary: #1f1f1f;
  --bg-card: rgba(255, 255, 255, 0.6);
  --bg-card-hover-start: #ff6600;
  --bg-card-hover-end: rgba(255, 132, 0, 0.7);
  --bg-card-thumb-overlay: rgba(255, 255, 255, 0.3);
  --bg-card-shadow: rgba(217, 202, 190, 0.5);
  --bg-card-hover-shadow: rgba(198, 187, 177, 0.5);
  --bg-card-shadow-inner: rgba(0, 0, 0, 1);
  --bg-pick-shadow: rgba(166, 154, 97, 0.25);
  --bg-modal: rgba(0, 0, 0, 0.8);
  --bg-modal-content: #f6f1e9;
  --bg-modal-close-hover: #e00400;
  --bg-scrollbar-thumb: #D0D0D0;
  --bg-scrollbar-thumb-dark: #383838;
  --bg-scrollbar-track: #F3F3F3;
  --bg-scrollbar-thumb-light: rgba(255, 255, 255, 0.2);
  --bg-scrollbar-thumb-light-hover: rgba(255, 255, 255, 0.3);
  --bg-scrollbar-track-light: rgba(255, 255, 255, 0.05);
  --bg-video-gauge: #171717;
  --bg-video-gauge-fill: #ff6c19;
  --bg-video-gauge-border: rgba(0, 0, 0, 0.4);
  --bg-learning-line: #c6c3c3;
  --bg-learning-dot: #8d8888;
  --bg-learning-active: rgba(255, 92, 0, 0.2);
  --bg-learning-active-line: #ffad7f;
  --bg-learning-active-dot: #ff5c00;
  --bg-learning-complete: rgba(0, 140, 73, 0.2);
  --bg-learning-complete-line: #7fc5a4;
  --bg-learning-complete-dot: #008c49;
  --bg-chapter-current: #146b51;
  --bg-chapter-completed: #ba9a85;
  --bg-card-base: #7e7e7e;
  --bg-card-current: #1d9b75;
  --bg-card-current-border: #1f9b76;
  --bg-card-current-bg: #dbefe9;
  --bg-card-completed: #ab3d00;
  --bg-gauge-fill: #e25e00;
  --bg-shadow: #8a7d64;
  --bg-puzzle-family: #7ed29b;
  --bg-puzzle-hanmac: #ffccca;
  --bg-puzzle-value: #87a7d6;
  --bg-puzzle-company: #b49a65;
  --bg-piece-1: #1d375d;
  --bg-piece-2: #662a0d;
  --bg-piece-3: #5b4822;
  --bg-piece-4: #2a5338;
  --bg-circle-border: #a7790f;
  --bg-circle-start: rgba(127, 47, 0, 0.1);
  --bg-circle-end: rgba(167, 121, 15, 0.5);
  --bg-circle-dot: rgba(221, 144, 0, 0.6);
  --bg-circle-dot-hover: rgba(221, 144, 0, 0.8);
  --bg-circle-dot-stroke: rgba(221, 144, 0, 0.2);
  --bg-gradient-start: #ece3d2;
  --bg-gradient-end: #fff;
  --bg-learning-line-color: #edba8a;
  --bg-modal-header: #f04400;
  --bg-textarea: #2a2a2a;
  --bg-textarea-placeholder: rgba(255, 255, 255, 0.5);
  /* border */
  --border-base: rgba(0, 0, 0, 0.05);
  --border-primary: #fff;
  --border-keyword-base: rgba(0, 0, 0, 0.05);
  --border-keyword-primary: rgba(255, 255, 255, 0.4);
  --border-keyword-primary-hover: rgba(0, 0, 0, 0.05);
  --border-keyword-secondary: rgba(255, 255, 255, 0.4);
  --border-keyword-secondary-hover: rgba(0, 0, 0, 0.1);
  --border-pick: rgba(255, 255, 255, 0.5);
  --border-video: rgba(255, 255, 255, 0.1);
  --border-btn: rgba(255, 255, 255, 0.2);
  --border-card: rgba(255, 255, 255, 0.8);
  --border-modal: #888;
  --border-comment-resizer: rgba(230, 227, 225, 0.1);
  /* drop */
  --text-shadow:
    -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000;
  --text-stroke: drop-shadow(0 0 0.5px #000);
  /* shadow */
  --shadow-pagination: rgba(0, 0, 0, 0.4);
  --shadow-modal: rgba(0, 0, 0, 0.25);
  --shadow-card-drop: 0 4px 8px rgba(0, 0, 0, 0.2);
  --shadow-card-drop-small: 0 4px 2px rgba(0, 0, 0, 0.05);
  --shadow-gauge-inset: rgba(0, 0, 0, 0.3);
  --shadow-comment: 0 8px 22px 22px rgba(0, 0, 0, 0.8);
}

/* 페이드 전환 */
.fade-out {
  opacity: 0;
  transition: opacity 0.4s ease;
}

.fade-in {
  opacity: 1;
  transition: opacity 0.4s ease;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes arrow-next {

  0%,
  100% {
    right: 72px;
  }

  50% {
    right: 50px;
  }
}

@keyframes bounce {

  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(-12px);
  }
}

@keyframes slideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scroll-down {
  0% {
    transform-origin: 50% 100%;
    transform: scaleY(1);
  }

  50% {
    transform-origin: 50% 100%;
    transform: scaleY(0);
  }

  50.1% {
    transform-origin: 50% 0;
    transform: scaleY(0);
  }

  to {
    transform-origin: 50% 0;
    transform: scaleY(1);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 0.2;
  }

  50% {
    opacity: 0.4;
  }
}

@keyframes borderFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes borderPulse {

  0%,
  100% {
    border-color: #fff;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.4);
  }

  50% {
    border-color: #fff;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.6);
  }
}

@font-face {
  font-family: "YeogiOttaeJalnan";
  src: url("https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_four@1.2/JalnanOTF00.woff") format("woff");
  font-weight: normal;
  font-display: swap;
}

.intro {
  background: var(--bg-intro);
  background-attachment: fixed;
  overflow: auto;
}

.intro .container {
  position: relative;
  top: 0;
  height: var(--window-inner-height);
  margin-top: 0;
  padding: 0;
  overflow: hidden;
  border: none;
  border-radius: 0;
  clip-path: none;
  background: var(--bg-intro);
  color: var(--text-intro-base);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.intro .text-ani {
  display: none;
}

.intro .text-ani:has(.welcome span.show),
.intro .text-ani:has(.update-line span.show),
.intro .text-ani:has(.card.show),
.intro .text-ani.animating {
  display: block;
}

@media only screen and (max-width: 991px) {
  .intro .text-ani:has(.card.show) {
    display: flex;
    flex-direction: column;
    flex: 1 1 0;
    min-height: 0;
    width: 100%;
  }
}

.intro .text-area {
  min-height: 160px;
  margin-bottom: 34px;
  text-align: center;
}

.intro .text-area:has(.greeting.hidden, .update-text.hidden) {
  min-height: 0;
  margin-bottom: 0;
}

.intro .greeting {
  font-size: 36px;
  font-weight: 300;
  line-height: 1.2;
}

@media only screen and (min-width: 1024px) {
  .intro .greeting {
    height: 656px;
  }
}

@media only screen and (max-width: 1023px) {
  .intro .greeting {
    font-size: 2.8rem;
    min-height: 15.8rem;
  }

  .intro .greeting p.welcome>*:nth-child(5) {
    display: block;
    line-height: 0;
  }
}

.intro .name {
  font-weight: 500;
}

.intro .welcome span {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
}

.intro .welcome span.show {
  animation: fadeInUp 0.4s forwards;
}

.intro .welcome em {
  font-weight: 500;
}

@media only screen and (max-width: 1023px) {
  .intro .welcome {
    margin-top: 2rem;
  }
}

.intro .update-text {
  text-align: center;
}

.intro .update-line {
  overflow: hidden;
  font-size: 36px;
}

@media only screen and (max-width: 1023px) {
  .intro .update-line {
    font-size: 2.8rem;
  }
}

@media only screen and (max-width: 1023px) {
  .intro .update-line:last-child {
    margin-top: 2rem;
  }
}

.intro .update-line.bold,
.intro .update-line em {
  font-weight: 500;
}

.intro .update-line>span {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
}

.intro .update-line>span.show {
  animation: slideUp 0.6s forwards;
}

.intro .cta-text {
  position: relative;
  width: 100vw;
  height: var(--window-inner-height);
  font-size: 42px;
  font-weight: 300;
  line-height: 1.2;
  text-align: center;
}

@media only screen and (max-width: 1023px) {
  .intro .cta-text {
    font-size: 2.8rem;
  }
}

.intro .cta-text>div {
  width: 100vw;
  height: var(--window-inner-height);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.intro .cta-text>div:not(.mask) {
  position: relative;
  z-index: 1;
  cursor: default;
}

.intro .cta-text>div:not(.mask) .text-section {
  opacity: 0;
  transform: translateY(20px);
}

.intro .cta-text>div:not(.mask) .text-section:has(.show) {
  background-image: url(../images/intro/promise.svg);
  background-position: bottom;
  background-size: 586px auto;
  background-repeat: no-repeat;
  animation: fadeInUp 0.5s forwards;
}

@media only screen and (max-width: 1023px) {
  .intro .cta-text>div:not(.mask) .text-section:has(.show) {
    background-size: 120% auto;
  }
}

.intro .cta-text>div:not(.mask) p {
  opacity: 0;
  transform: translateY(20px);
}

.intro .cta-text>div:not(.mask) p.show {
  animation: fadeInUp 0.5s forwards;
}

.intro .cta-text .text-section {
  height: 260px;
  translate: 0 -35%;
  opacity: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

@media only screen and (max-width: 1023px) {
  .intro .cta-text .text-section {
    width: calc(100% - 32px);
    max-width: 452px;
    height: 18rem;
    translate: 0 -40%;
  }
}

.intro .cta-text .text-section.show {
  animation: opacity 0.5s forwards;
}

.intro .cta-text em {
  font-weight: 500;
}

.intro .cta-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 99;
  width: calc(100% - 32px);
  max-width: 483px;
  height: 116px;
  padding: 22px 0;
  border: none;
  border-radius: 24px;
  background: radial-gradient(117.51% 77.94% at 48.87% 100%, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.3) 24.58%, rgba(255, 255, 255, 0) 100%), #ff8200;
  color: white;
  font-size: 36px;
  font-weight: bold;
  text-align: center;
  text-shadow: 0 2px 2px rgba(201, 121, 38, 0.5);
  opacity: 0;
  transform: translate(-50%, 25%) translateY(50px);
  transition: all 0.3s;
}

@media only screen and (max-width: 1023px) {
  .intro .cta-btn {
    width: calc(100% - 32px);
    height: 68px;
    padding: 0;
    font-size: 28px;
  }
}

@media only screen and (min-width: 992px) {
  .intro .cta-btn {
    box-shadow: 0 -4px 4px 0 #e18d36 inset, 4px 4px 12px -4px rgba(220, 196, 172, 0.85);
  }
}

.intro .cta-btn.show {
  opacity: 1;
  transform: translate(-50%, 25%) translateY(0);
  transition: all 0.3s linear;
}

.intro .cta-btn::after {
  content: " ";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 2px;
  box-sizing: border-box;
  background: linear-gradient(65deg, rgba(255, 255, 255, 0.6) 0%, transparent 100%) #ff8200;
  content: "";
  display: block;
  position: absolute;
  inset: 0;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  border-radius: inherit;
}

.intro .cta-btn .ico-arrow {
  position: absolute;
  top: 50%;
  right: 72px;
  display: inline-block;
  width: 24px;
  height: 32px;
  background-image: url(../images/ico/ico_arrow_next_dashed.svg);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  filter: drop-shadow(0 2px 2px rgba(201, 121, 38, 0.5));
  transform: translateY(-50%);
  animation: arrow-next 3s infinite ease-in-out;
}

.intro .mask {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  width: 100%;
  height: 100%;
  min-height: 100%;
  background-color: var(--bg-intro-mask);
  color: rgba(0, 0, 0, 0.2);
  pointer-events: none;
  --size: 0px;
  --x: 50vw;
  --y: 50vh;
  -webkit-mask-image: url(../images/cursor.svg);
  -webkit-mask-origin: content-box;
  -webkit-mask-position: calc(var(--x) - var(--size) / 2) calc(var(--y) - var(--size) / 2), center;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: var(--size), contain;
  mask-image: url(../images/cursor.svg);
  mask-origin: content-box;
  mask-position: calc(var(--x) - var(--size) / 2) calc(var(--y) - var(--size) / 2), center;
  mask-repeat: no-repeat;
  mask-size: var(--size), contain;
  transition: -webkit-mask-size 0.2s linear;
  transition: mask-size 0.2s linear;
  transition: mask-size 0.2s linear, -webkit-mask-size 0.2s linear;
}

@media only screen and (max-width: 991px) {
  .intro .mask {
    -webkit-mask-image: none;
    mask-image: none;
    clip-path: circle(0% at 50% 50%);
    transition: clip-path 3.5s ease-out;
  }

  .intro .mask.expand {
    clip-path: circle(300% at 50% 50%);
  }
}

.intro .mask .text-section {
  background-image: url(../images/intro/promise_b.svg);
  background-position: bottom;
  background-size: auto;
  background-repeat: no-repeat;
}

@media only screen and (max-width: 1023px) {
  .intro .mask .text-section {
    background-size: 95% auto;
  }
}

.intro .mask .mask-text {
  color: #fff;
}

.intro .mask .mask-text em {
  font-style: normal;
}

.intro .content-area {
  margin-top: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

@media only screen and (max-width: 991px) {
  .intro .content-area {
    flex: 1 1 0;
    min-height: 0;
    margin-top: 0;
    align-items: stretch;
  }
}

.intro .card {
  opacity: 0;
  transform: translateY(60px);
  transition: all 0.6s ease;
  background: white;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 0 0 12px 12px;
  box-shadow: 0 24px 24px 0 rgba(215, 209, 204, 0.5);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

@media only screen and (min-width: 992px) {
  .intro .card {
    flex: 0 0 calc(50% - 12px);
    padding: 60px 32px 48px;
  }
}

@media only screen and (min-width: 1200px) {
  .intro .card {
    flex: 1 1 0;
    width: 340px;
    padding: 86px 22px 68px;
  }
}

@media only screen and (max-width: 991px) {
  .intro .card {
    flex: 1 1 0;
    min-height: 0;
    width: calc(100vw - 32px);
    padding: 0 24px;
    z-index: 9;
    transition-duration: 0.9s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    box-shadow: 0 4px 12px rgba(215, 209, 204, 0.5);
    border-radius: 12px;
  }
}

.intro .card.show {
  opacity: 1;
  transform: translateY(0);
}

.intro .card-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

@media only screen and (min-width: 1200px) {
  .intro .card-list {
    flex-wrap: nowrap;
  }
}

@media only screen and (max-width: 1023px) {
  .intro .card-list {
    gap: 2.4rem;
  }
}

@media only screen and (max-width: 991px) {
  .intro .card-list {
    flex-direction: column;
    flex-wrap: nowrap;
    flex: 1 1 0;
    min-height: var(--window-inner-height);
    gap: 8px;
    padding: 8px 16px;
    align-items: stretch;
  }
}

.intro .card-num {
  font-family: YeogiOttaeJalnan;
  font-size: 120px;
  font-weight: 400;
  line-height: 1;
  color: transparent;
  opacity: 0.1;
  background: linear-gradient(180deg, transparent 30%, #ffffff 80%) #1b1810;
  -webkit-background-clip: text;
  background-clip: text;
}

@media only screen and (max-width: 1023px) {
  .intro .card-num {
    font-size: 6rem;
  }
}

.intro .card-title {
  margin-top: -46px;
  margin-bottom: 42px;
  font-size: 32px;
  font-weight: 300;
  line-height: 1.2;
}

@media only screen and (max-width: 1023px) {
  .intro .card-title {
    font-size: 2.4rem;
  }
}

@media only screen and (max-width: 991px) {
  .intro .card-title {
    margin-top: -32px;
    margin-bottom: 0;
  }
}

.intro .card-desc {
  font-size: 24px;
}

@media only screen and (max-width: 1023px) {
  .intro .card-desc {
    font-size: 1.6rem;
  }
}

@media only screen and (max-width: 991px) {
  .intro .card-desc {
    display: none;
  }
}

.intro .card em {
  font-weight: 700;
}

.typing {
  opacity: 0;
}

.cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 0.7s infinite;
}

.scroll-indicator {
  position: absolute;
  bottom: 0;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  transform: translateX(-50%);
}

.scroll-indicator.hidden {
  opacity: 0;
  pointer-events: none;
}

.scroll-indicator.sec2 .bar {
  height: 60px;
}

.scroll-indicator span {
  font-size: 16px;
  color: var(--text-intro-base);
  opacity: 0.8;
}

.scroll-indicator .bar {
  width: 2px;
  height: 110px;
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0.3);
  transition: height 0.5s linear;
}

.scroll-indicator .bar::before {
  content: " ";
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 0 0 4px 4px;
  background-color: #111;
  animation: scroll-down 2s infinite ease-in-out;
}