:root {
  --ink: #161616;
  --ink-soft: #3f3b33;
  --paper: #f6f0e6;
  --paper-deep: #ece0ce;
  --gold: #b98c45;
  --jade: #31584f;
  --white: #fffaf1;
  --line: rgba(31, 26, 19, 0.14);
  --shadow: 0 22px 70px rgba(26, 20, 13, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: "Pretendard", "Noto Sans KR", "Malgun Gothic", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 56px);
  color: var(--white);
  background: rgba(15, 13, 10, 0.62);
  border-bottom: 1px solid rgba(255, 250, 241, 0.12);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 192px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--ink);
  background: var(--gold);
  border-radius: 50%;
  font-family: Georgia, serif;
  font-size: 24px;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand small {
  margin-top: 2px;
  color: rgba(255, 250, 241, 0.68);
  font-size: 11px;
  letter-spacing: 0;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  font-size: 15px;
}

nav a {
  color: rgba(255, 250, 241, 0.82);
}

nav a:hover {
  color: var(--white);
}

.account-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header-button {
  min-height: 38px;
  padding: 0 14px;
  color: var(--white);
  background: rgba(255, 250, 241, 0.06);
  border: 1px solid rgba(255, 250, 241, 0.22);
  border-radius: 6px;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.header-button.filled {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.hero {
  position: relative;
  display: grid;
  min-height: 92vh;
  overflow: hidden;
  color: var(--white);
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(9, 8, 6, 0.92) 0%, rgba(12, 10, 8, 0.68) 42%, rgba(12, 10, 8, 0.22) 100%),
    linear-gradient(0deg, rgba(20, 16, 11, 0.56) 0%, rgba(20, 16, 11, 0) 48%);
}

.hero-content {
  position: relative;
  z-index: 1;
  align-self: center;
  width: min(720px, calc(100% - 36px));
  margin-left: clamp(18px, 7vw, 92px);
  padding-top: 92px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.eyebrow.dark {
  color: var(--jade);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.16;
  letter-spacing: 0;
}

h1 {
  max-width: 690px;
  font-size: clamp(42px, 6vw, 82px);
  font-weight: 800;
}

h2 {
  font-size: clamp(30px, 4vw, 54px);
}

h3 {
  font-size: clamp(24px, 2.6vw, 36px);
}

.hero-copy {
  max-width: 560px;
  margin: 24px 0 0;
  color: rgba(255, 250, 241, 0.78);
  font-size: clamp(17px, 2vw, 21px);
}

.demo-status {
  display: inline-flex;
  margin: 22px 0 0;
  padding: 9px 12px;
  color: rgba(255, 250, 241, 0.82);
  background: rgba(255, 250, 241, 0.08);
  border: 1px solid rgba(255, 250, 241, 0.16);
  border-radius: 6px;
  font-size: 14px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
}

.button.primary {
  color: #16120c;
  background: var(--gold);
}

.button.primary:hover {
  background: #c99c55;
}

.button.ghost {
  color: var(--white);
  border-color: rgba(255, 250, 241, 0.34);
  background: rgba(255, 250, 241, 0.06);
}

.button.ghost.dark {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 250, 241, 0.42);
}

.button.light {
  background: var(--white);
}

.intro-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 250, 241, 0.2);
  border-bottom: 1px solid var(--line);
}

.intro-band div {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 96px;
  padding: 22px clamp(18px, 4vw, 56px);
  background: var(--ink);
  color: var(--white);
}

.intro-band strong {
  color: var(--gold);
  font-family: Georgia, serif;
  font-size: 28px;
}

.section {
  padding: clamp(68px, 9vw, 124px) clamp(18px, 4vw, 56px);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head p:not(.eyebrow) {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.section-head.compact {
  max-width: 520px;
  margin: 0;
}

.lecture-layout {
  display: grid;
  grid-template-columns: minmax(260px, 360px) minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
}

.lecture-list {
  display: grid;
  gap: 12px;
}

.video-course-list {
  align-content: start;
}

.lecture-card {
  width: 100%;
  min-height: 132px;
  padding: 22px;
  text-align: left;
  color: var(--ink);
  background: rgba(255, 250, 241, 0.66);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.lecture-card:hover,
.lecture-card.is-active {
  border-color: rgba(185, 140, 69, 0.7);
  box-shadow: var(--shadow);
}

.lecture-card.locked {
  position: relative;
}

.lecture-card.locked::after {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 3px 8px;
  color: var(--white);
  background: var(--ink);
  border-radius: 999px;
  content: "LOCK";
  font-size: 11px;
  font-weight: 900;
}

.lecture-card span,
.lecture-card strong,
.lecture-card small {
  display: block;
}

.lecture-card span {
  color: var(--jade);
  font-size: 13px;
  font-weight: 900;
}

.lecture-card strong {
  margin-top: 6px;
  font-size: 21px;
  line-height: 1.3;
}

.lecture-card small {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.5;
}

.player-panel {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.official-panel {
  background:
    linear-gradient(135deg, rgba(255, 250, 241, 0.96), rgba(236, 224, 206, 0.92)),
    var(--white);
}

.official-card {
  display: grid;
  align-content: center;
  min-height: 100%;
  padding: clamp(26px, 4vw, 48px);
}

.official-card p:not(.eyebrow) {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.feature-list {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  padding: 14px 16px;
  color: var(--ink-soft);
  background: rgba(255, 250, 241, 0.72);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-weight: 700;
}

.vimeo-placeholder {
  display: grid;
  gap: 8px;
  margin-top: 24px;
  padding: 24px;
  color: var(--white);
  background: var(--ink);
  border-radius: 8px;
}

.vimeo-placeholder strong {
  color: var(--gold);
  font-size: 22px;
}

.vimeo-placeholder span {
  color: rgba(255, 250, 241, 0.74);
}

.vimeo-embed {
  position: relative;
  margin-top: 24px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #111;
  border-radius: 8px;
}

.vimeo-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #111;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-lock {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-content: center;
  gap: 12px;
  padding: 28px;
  text-align: center;
  color: var(--white);
  background: rgba(11, 10, 8, 0.84);
}

.video-lock strong {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.2;
}

.video-lock span {
  color: rgba(255, 250, 241, 0.76);
}

.player-copy {
  padding: clamp(22px, 3vw, 34px);
}

.player-copy p:last-child {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 5vw, 74px);
  background: var(--paper-deep);
}

.pricing-section {
  background: var(--white);
}

.books-section {
  background: var(--paper);
}

.book-promo {
  overflow: hidden;
  margin-bottom: clamp(34px, 5vw, 62px);
  background: #09050f;
  border: 1px solid rgba(185, 140, 69, 0.35);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.book-promo img {
  display: block;
  width: 100%;
  height: auto;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.book-card {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  align-items: stretch;
  min-height: 320px;
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 42px rgba(26, 20, 13, 0.08);
}

.book-image {
  width: 100%;
  height: 276px;
  object-fit: cover;
  object-position: center top;
  background: #160625;
  border-radius: 6px;
  box-shadow: 0 18px 32px rgba(26, 20, 13, 0.16);
}

.book-image--focus {
  object-position: center 34%;
}

.book-label {
  color: var(--jade);
  font-size: 13px;
  font-weight: 900;
}

.book-card h3 {
  margin-top: 8px;
  font-size: 24px;
}

.book-card p {
  margin: 12px 0 0;
  color: var(--ink-soft);
}

.book-price {
  display: block;
  margin: 18px 0;
  font-size: 24px;
}

.book-order-note {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  margin-top: 18px;
  padding: 20px;
  color: var(--white);
  background: var(--ink);
  border-radius: 8px;
}

.book-order-note strong {
  color: var(--gold);
  margin-right: 8px;
}

.book-order-note span {
  color: rgba(255, 250, 241, 0.84);
}

.naming-section {
  background:
    linear-gradient(135deg, rgba(255, 250, 241, 0.92), rgba(236, 224, 206, 0.88)),
    var(--white);
}

.naming-hero {
  position: relative;
  min-height: clamp(320px, 42vw, 520px);
  margin-bottom: clamp(34px, 5vw, 62px);
  overflow: hidden;
  color: var(--white);
  background: #090806;
  border: 1px solid rgba(185, 140, 69, 0.35);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.naming-hero::after {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 8, 6, 0.92), rgba(9, 8, 6, 0.68) 42%, rgba(9, 8, 6, 0.16)),
    linear-gradient(0deg, rgba(9, 8, 6, 0.6), rgba(9, 8, 6, 0.05));
  content: "";
}

.naming-hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.naming-hero-copy {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  width: min(720px, calc(100% - 36px));
  padding: clamp(34px, 6vw, 72px);
}

.naming-hero-copy span {
  color: var(--gold);
  font-size: 15px;
  font-weight: 900;
}

.naming-hero-copy strong {
  max-width: 680px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.12;
}

.naming-hero-copy p {
  max-width: 560px;
  margin: 0;
  color: rgba(255, 250, 241, 0.78);
  font-size: clamp(17px, 2vw, 21px);
}

.naming-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 22px;
  align-items: start;
}

.naming-form,
.naming-info {
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 42px rgba(26, 20, 13, 0.08);
}

.naming-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: clamp(22px, 3vw, 34px);
  background: var(--white);
}

.naming-form label {
  display: grid;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 900;
}

.naming-form label.full {
  grid-column: 1 / -1;
}

.naming-form input,
.naming-form select,
.naming-form textarea,
.naming-message {
  width: 100%;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

.naming-form input,
.naming-form select {
  min-height: 48px;
  padding: 0 12px;
}

.naming-form textarea,
.naming-message {
  padding: 12px;
  resize: vertical;
}

.naming-info {
  display: grid;
  gap: 12px;
  padding: clamp(22px, 3vw, 30px);
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(49, 88, 79, 0.94), rgba(22, 22, 22, 0.96)),
    var(--jade);
}

.naming-info strong {
  color: var(--gold);
  font-size: 24px;
}

.naming-info span {
  color: rgba(255, 250, 241, 0.82);
}

.naming-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 8px;
}

.naming-message {
  min-height: 170px;
  margin-top: 8px;
  color: var(--white);
  background: rgba(255, 250, 241, 0.08);
  border-color: rgba(255, 250, 241, 0.18);
}

.naming-message::placeholder {
  color: rgba(255, 250, 241, 0.54);
}

.copy-status {
  min-height: 24px;
  margin: 0;
  color: var(--gold);
  font-size: 14px;
  font-weight: 800;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.price-card {
  display: grid;
  align-content: start;
  gap: 16px;
  min-height: 280px;
  padding: clamp(24px, 3vw, 34px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.price-card.featured {
  color: var(--white);
  background: var(--jade);
  border-color: rgba(49, 88, 79, 0.4);
  box-shadow: var(--shadow);
}

.price-card span {
  color: var(--gold);
  font-size: 14px;
  font-weight: 900;
}

.price-card strong {
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.1;
}

.price-card p {
  margin: 0;
  color: var(--ink-soft);
}

.price-card.featured p {
  color: rgba(255, 250, 241, 0.78);
}

.timeline {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.timeline li {
  position: relative;
  min-height: 108px;
  padding: 22px 22px 22px 76px;
  background: rgba(255, 250, 241, 0.72);
  border: 1px solid var(--line);
  border-radius: 8px;
  counter-increment: steps;
}

.timeline li::before {
  position: absolute;
  top: 22px;
  left: 22px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--white);
  background: var(--jade);
  border-radius: 50%;
  content: counter(steps);
  font-weight: 900;
}

.timeline strong,
.timeline span {
  display: block;
}

.timeline strong {
  font-size: 21px;
}

.timeline span {
  margin-top: 8px;
  color: var(--ink-soft);
}

.mentor-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 380px);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(68px, 9vw, 118px) clamp(18px, 4vw, 56px);
  background: var(--white);
}

.mentor-section p:not(.eyebrow) {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.mentor-note {
  display: grid;
  gap: 12px;
  padding: 28px;
  color: var(--white);
  background: var(--jade);
  border-radius: 8px;
}

.mentor-note strong {
  color: var(--gold);
  font-size: 22px;
}

.mentor-note .mentor-books-title {
  margin-top: 12px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 250, 241, 0.18);
}

.mentor-note span {
  padding-top: 12px;
  border-top: 1px solid rgba(255, 250, 241, 0.18);
}

.contact-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(54px, 7vw, 86px) clamp(18px, 4vw, 56px);
  color: var(--white);
  background: var(--ink);
}

.contact-section h2 {
  max-width: 760px;
}

.contact-section p:not(.eyebrow) {
  margin: 14px 0 0;
  color: rgba(255, 250, 241, 0.72);
}

.contact-lines {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.contact-lines a {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 0 16px;
  color: var(--ink);
  background: var(--gold);
  border-radius: 6px;
  font-size: 18px;
  font-weight: 900;
}

.business-card {
  display: grid;
  gap: 10px;
  min-width: min(360px, 100%);
  padding: 24px;
  color: var(--white);
  background: rgba(255, 250, 241, 0.07);
  border: 1px solid rgba(255, 250, 241, 0.16);
  border-radius: 8px;
}

.business-card strong {
  color: var(--gold);
  font-size: 20px;
}

.business-card span {
  color: rgba(255, 250, 241, 0.78);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(18px, 4vw, 56px);
  color: rgba(255, 250, 241, 0.7);
  background: #0d0c0a;
  font-size: 14px;
}

.auth-modal {
  width: min(520px, calc(100vw - 32px));
  padding: 0;
  background: transparent;
  border: 0;
}

.auth-modal::backdrop {
  background: rgba(12, 10, 8, 0.68);
  backdrop-filter: blur(8px);
}

.modal-card {
  position: relative;
  display: grid;
  gap: 16px;
  padding: clamp(24px, 4vw, 36px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.modal-card h2 {
  font-size: clamp(26px, 4vw, 38px);
}

.modal-help {
  margin: 0;
  color: var(--ink-soft);
}

.modal-card label {
  display: grid;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 800;
}

.modal-card input {
  width: 100%;
  min-height: 46px;
  padding: 0 12px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  color: var(--ink);
  background: transparent;
  border: 0;
  font-size: 26px;
  cursor: pointer;
}

.checkout-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.checkout-box strong {
  font-size: 24px;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    width: 100dvw;
    padding: 14px 18px;
  }

  nav {
    display: grid;
    width: calc(100dvw - 36px);
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    font-size: 11px;
  }

  nav a {
    min-width: 0;
    text-align: center;
    white-space: nowrap;
  }

  .account-actions {
    width: 100%;
  }

  .header-button {
    flex: 1;
  }

  .hero {
    min-height: 88vh;
  }

  .hero-content {
    width: min(640px, calc(100dvw - 36px));
    margin: 0 18px;
    padding-top: 130px;
  }

  h1 {
    font-size: clamp(34px, 10vw, 46px);
  }

  .intro-band,
  .lecture-layout,
  .split-section,
  .mentor-section,
  .naming-layout,
  .pricing-grid,
  .book-grid {
    grid-template-columns: 1fr;
  }

  .intro-band div {
    min-height: 76px;
  }

  .contact-section,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .brand {
    min-width: 0;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  nav a {
    line-height: 1.25;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .lecture-card {
    min-height: 118px;
  }

  .book-card {
    grid-template-columns: 1fr;
  }

  .naming-form,
  .naming-actions {
    grid-template-columns: 1fr;
  }

  .naming-hero-copy {
    padding: 28px;
  }

  .book-image {
    height: auto;
    max-height: 520px;
  }
}