:root {
  --af-bg: #f7fbf2;
  --af-bg-strong: #f0ffdf;
  --af-bg-pink: #fff4f6;
  --af-surface: #ffffff;
  --af-ink: #243127;
  --af-muted: #637066;
  --af-line: #dde7d8;
  --af-line-dark: #b8c9b4;
  --af-primary: #4d7445;
  --af-primary-dark: #2e4a32;
  --af-primary-deep: #1c3525;
  --af-green: #a8df8e;
  --af-pink: #ffd8df;
  --af-accent: #f28da1;
  --af-white: #ffffff;
  --af-black: #111711;
  --af-soft-black: #172018;
  --af-overlay-a: rgba(18, 31, 20, 0.5);
  --af-overlay-b: rgba(15, 27, 17, 0.62);
  --af-surface-94: rgba(255, 255, 255, 0.94);
  --af-surface-88: rgba(255, 255, 255, 0.88);
  --af-surface-18: rgba(255, 255, 255, 0.18);
  --af-surface-12: rgba(255, 255, 255, 0.12);
  --af-surface-08: rgba(255, 255, 255, 0.08);
  --af-ink-76: rgba(36, 49, 39, 0.76);
  --af-ink-50: rgba(36, 49, 39, 0.5);
  --af-shadow: 0 20px 60px rgba(35, 60, 39, 0.12);
  --af-shadow-soft: 0 10px 32px rgba(35, 60, 39, 0.08);
  --af-focus: rgba(242, 141, 161, 0.42);
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}

body {
  margin: 0;
  background: var(--af-bg);
  color: var(--af-ink);
  font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

button,
input,
textarea,
select {
  color: inherit;
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  cursor: pointer;
}

img {
  display: block;
  max-width: 100%;
}

svg {
  display: block;
  width: 20px;
  height: 20px;
  stroke-width: 1.8;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 3px solid var(--af-accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 4px;
  background: var(--af-white);
  color: var(--af-ink);
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-container {
  width: calc(100% - 48px);
  max-width: 1200px;
  margin: 0 auto;
}

.section-kicker,
.hero-kicker {
  margin: 0 0 18px;
  color: var(--af-primary);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  text-transform: uppercase;
}

.section-kicker--light,
.hero-kicker {
  color: var(--af-white);
}

.section-heading {
  margin-bottom: 56px;
}

.section-heading--row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
}

.section-heading h2 {
  margin: 0;
  font-size: 44px;
  line-height: 1.25;
}

.section-heading > p,
.section-heading--row > p {
  max-width: 430px;
  margin: 0;
  color: var(--af-muted);
  font-size: 15px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button svg {
  width: 17px;
  height: 17px;
}

.button--primary {
  background: var(--af-primary-dark);
  color: var(--af-white);
}

.button--primary:hover {
  background: var(--af-primary-deep);
}

.button--light {
  background: var(--af-white);
  color: var(--af-primary-deep);
}

.button--light:hover {
  background: var(--af-bg-strong);
}

.button--accent {
  background: var(--af-accent);
  color: var(--af-black);
}

.button--accent:hover {
  background: var(--af-pink);
}

.button--outline {
  border-color: var(--af-primary-dark);
  background: transparent;
  color: var(--af-primary-dark);
}

.button--outline:hover {
  background: var(--af-primary-dark);
  color: var(--af-white);
}

.button--ghost-light {
  border-color: var(--af-surface-88);
  background: transparent;
  color: var(--af-white);
}

.button--ghost-light:hover {
  background: var(--af-surface-12);
}

.button--disabled {
  border-color: var(--af-line);
  background: var(--af-bg);
  color: var(--af-muted);
  cursor: not-allowed;
}

.button--disabled:hover {
  transform: none;
}

.button--header {
  min-height: 42px;
  padding: 10px 16px;
  background: var(--af-primary-dark);
  color: var(--af-white);
  font-size: 13px;
}

.text-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  color: var(--af-primary-dark);
  font-size: 14px;
  font-weight: 700;
}

.text-link svg {
  width: 17px;
  transition: transform 180ms ease;
}

.text-link:hover svg {
  transform: translateX(4px);
}

.text-link--light {
  color: var(--af-white);
}

.icon-button {
  display: inline-flex;
  width: 44px;
  min-width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: inherit;
  transition: background-color 180ms ease;
}

.icon-button:hover {
  background: var(--af-bg-strong);
}

.brand-lockup {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 11px;
  font-family: "Noto Serif KR", serif;
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
}

.brand-lockup__mark {
  display: inline-block;
  width: 14px;
  height: 14px;
  flex: 0 0 14px;
  border: 4px solid var(--af-accent);
  border-radius: 50% 50% 50% 3px;
  transform: rotate(-18deg);
}

.brand-lockup__mark--large {
  width: 42px;
  height: 42px;
  border-width: 10px;
}

.brand-lockup--compact {
  font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
  font-size: 14px;
  font-weight: 800;
}

.brand-lockup--light {
  color: var(--af-white);
}

.announcement-bar,
.b-utility {
  background: var(--af-primary-deep);
  color: var(--af-white);
  font-size: 12px;
}

.announcement-bar__inner,
.b-utility__inner {
  display: flex;
  min-height: 36px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.announcement-bar a,
.b-utility a {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  gap: 6px;
}

.announcement-bar svg {
  width: 14px;
  height: 14px;
}

.b-utility__inner > div {
  display: flex;
  gap: 22px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid var(--af-line);
  background: var(--af-surface-94);
  transition: box-shadow 180ms ease;
}

.site-header.is-scrolled {
  box-shadow: var(--af-shadow-soft);
}

.site-header__inner {
  position: relative;
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.main-nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--af-ink);
  font-size: 14px;
  font-weight: 600;
}

.main-nav a:hover {
  color: var(--af-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.menu-toggle {
  display: none;
}

.preview-switcher {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 200;
  display: grid;
  grid-template-columns: repeat(3, 44px);
  overflow: hidden;
  border: 1px solid var(--af-line-dark);
  border-radius: 8px;
  background: var(--af-surface-94);
  box-shadow: var(--af-shadow);
}

.preview-switcher a {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--af-line);
  color: var(--af-muted);
  font-size: 13px;
  font-weight: 800;
}

.preview-switcher a:last-child {
  border-right: 0;
}

.preview-switcher a:hover,
.preview-switcher a.is-active {
  background: var(--af-primary-dark);
  color: var(--af-white);
}

.preview-switcher svg {
  width: 17px;
  height: 17px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 84px;
  z-index: 210;
  max-width: 340px;
  padding: 14px 18px;
  border-radius: 6px;
  background: var(--af-black);
  color: var(--af-white);
  box-shadow: var(--af-shadow);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Overview */
.overview-page {
  min-height: 100vh;
  background: var(--af-bg);
}

.overview-header {
  border-bottom: 1px solid var(--af-line);
  background: var(--af-surface);
}

.overview-header__inner {
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.overview-header__meta {
  color: var(--af-muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.overview-intro {
  padding: 110px 0 86px;
}

.overview-intro__grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr;
  align-items: end;
  gap: 100px;
}

.overview-intro h1 {
  margin: 0;
  font-family: "Noto Serif KR", serif;
  font-size: 60px;
  font-weight: 600;
  line-height: 1.2;
}

.overview-intro__copy > p {
  margin: 0 0 28px;
  color: var(--af-muted);
  font-size: 16px;
}

.recommendation-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  padding: 18px 0;
  border-top: 1px solid var(--af-line-dark);
  border-bottom: 1px solid var(--af-line-dark);
}

.recommendation-note__label {
  grid-row: span 2;
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  align-self: start;
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--af-primary-dark);
  color: var(--af-white);
  font-size: 11px;
  font-weight: 700;
}

.recommendation-note strong {
  font-size: 15px;
}

.recommendation-note > span:last-child {
  color: var(--af-muted);
  font-size: 13px;
}

.concept-picker {
  padding-bottom: 120px;
}

.concept-picker__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.concept-card {
  overflow: hidden;
  border: 1px solid var(--af-line);
  border-radius: 8px;
  background: var(--af-surface);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.concept-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--af-shadow);
}

.concept-card__media {
  position: relative;
  height: 500px;
  overflow: hidden;
}

.concept-card__media::after {
  position: absolute;
  inset: 0;
  background: var(--af-surface-08);
  content: "";
}

.concept-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms ease;
}

.concept-card--a .concept-card__media img {
  object-position: center 43%;
}

.concept-card--b .concept-card__media img {
  object-position: center 50%;
}

.concept-card:hover .concept-card__media img {
  transform: scale(1.025);
}

.concept-card__index {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 2;
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--af-surface-94);
  color: var(--af-primary-deep);
  font-size: 14px;
  font-weight: 800;
}

.concept-card__body {
  display: flex;
  min-height: 152px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 28px;
}

.concept-card__body p {
  margin: 0 0 5px;
  color: var(--af-primary);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.concept-card__body h2 {
  margin: 0 0 8px;
  font-size: 28px;
  line-height: 1.2;
}

.concept-card--a .concept-card__body h2 {
  font-family: "Noto Serif KR", serif;
}

.concept-card__body span {
  color: var(--af-muted);
  font-size: 14px;
}

.concept-card__body .icon-action {
  display: inline-flex;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--af-line);
  border-radius: 50%;
  color: var(--af-primary-dark);
}

.concept-comparison {
  padding: 110px 0 120px;
  background: var(--af-surface);
}

.comparison-table-wrap {
  overflow-x: auto;
  border-top: 2px solid var(--af-ink);
}

.comparison-table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  table-layout: fixed;
}

.comparison-table th,
.comparison-table td {
  padding: 21px 24px;
  border-bottom: 1px solid var(--af-line);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

.comparison-table thead th {
  color: var(--af-muted);
  font-size: 12px;
  font-weight: 700;
}

.comparison-table tbody th {
  width: 24%;
  color: var(--af-primary-dark);
}

.overview-footer {
  background: var(--af-primary-deep);
  color: var(--af-white);
}

.overview-footer__inner {
  display: flex;
  min-height: 84px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-size: 12px;
}

/* Concept A */
.concept-a {
  background: var(--af-bg);
}

.concept-a h1,
.concept-a h2,
.concept-a h3 {
  font-family: "Noto Serif KR", serif;
  font-weight: 600;
}

.a-hero {
  position: relative;
  min-height: 650px;
  height: calc(100vh - 112px);
  max-height: 760px;
  overflow: hidden;
  color: var(--af-white);
}

.a-hero__image,
.a-hero__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.a-hero__image {
  object-fit: cover;
  object-position: center 42%;
}

.a-hero__overlay {
  background: var(--af-overlay-a);
}

.a-hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  height: calc(100% - 70px);
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-top: 28px;
}

.a-hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: 64px;
  line-height: 1.16;
  text-shadow: 0 3px 24px var(--af-overlay-b);
}

.a-hero h1 span {
  display: inline-block;
  margin-bottom: 10px;
  font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
  font-size: 21px;
  font-weight: 700;
}

.a-hero__lead {
  max-width: 630px;
  margin: 28px 0 0;
  font-size: 18px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 34px;
}

.a-hero__foot {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  display: flex;
  min-height: 70px;
  align-items: center;
  gap: 30px;
  border-top: 1px solid var(--af-surface-18);
  font-size: 12px;
  font-weight: 600;
}

.a-hero__foot span {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.a-hero__foot span::before {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--af-accent);
  content: "";
}

.a-opening {
  padding: 124px 0;
  background: var(--af-surface);
}

.a-opening__grid {
  display: grid;
  grid-template-columns: 40px 1.05fr 0.8fr;
  align-items: start;
  gap: 58px;
}

.vertical-label {
  margin: 3px 0 0;
  color: var(--af-muted);
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.a-opening h2,
.a-for h2,
.a-materials h2 {
  margin: 0;
  font-size: 44px;
  line-height: 1.36;
}

.a-opening__copy {
  padding-top: 36px;
}

.a-opening__copy p {
  margin: 0 0 18px;
  color: var(--af-muted);
  font-size: 15px;
}

.a-for {
  padding: 130px 0;
  background: var(--af-bg-pink);
}

.a-for__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.9fr;
  align-items: center;
  gap: 100px;
}

.a-collage {
  position: relative;
  min-height: 610px;
}

.a-collage figure {
  margin: 0;
  overflow: hidden;
}

.a-collage__main {
  position: absolute;
  inset: 0 14% 70px 0;
  border-radius: 120px 18px 18px 18px;
}

.a-collage__accent {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 43%;
  height: 280px;
  border: 10px solid var(--af-bg-pink);
  border-radius: 18px 90px 18px 18px;
}

.a-collage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.a-collage__main img {
  object-position: center 50%;
}

.a-collage__accent img {
  object-position: center;
}

.a-collage__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  color: var(--af-muted);
  font-size: 11px;
}

.editorial-list {
  margin: 46px 0 0;
  padding: 0;
  border-top: 1px solid var(--af-line-dark);
  list-style: none;
}

.editorial-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--af-line-dark);
}

.editorial-list li > span {
  color: var(--af-primary);
  font-size: 11px;
  font-weight: 800;
}

.editorial-list strong {
  display: block;
  margin-bottom: 7px;
  font-family: "Noto Serif KR", serif;
  font-size: 18px;
}

.editorial-list p {
  margin: 0;
  color: var(--af-muted);
  font-size: 14px;
}

.a-process {
  padding: 130px 0;
  background: var(--af-bg);
}

.process-line {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--af-line-dark);
  list-style: none;
}

.process-line li {
  position: relative;
  min-height: 220px;
  padding: 34px 26px 30px 0;
  border-right: 1px solid var(--af-line);
}

.process-line li:not(:first-child) {
  padding-left: 26px;
}

.process-line li:last-child {
  border-right: 0;
}

.process-line li::before {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--af-accent);
  content: "";
}

.process-line li:not(:first-child)::before {
  left: 26px;
}

.process-line span {
  display: block;
  margin-bottom: 38px;
  color: var(--af-primary);
  font-size: 11px;
  font-weight: 800;
}

.process-line strong {
  display: block;
  margin-bottom: 12px;
  font-family: "Noto Serif KR", serif;
  font-size: 20px;
}

.process-line p {
  margin: 0;
  color: var(--af-muted);
  font-size: 14px;
}

.a-class-feature {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  margin-top: 86px;
  border-top: 1px solid var(--af-line-dark);
  border-bottom: 1px solid var(--af-line-dark);
}

.a-class-feature__image {
  min-height: 600px;
  overflow: hidden;
}

.a-class-feature__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}

.a-class-feature__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 64px 0 64px 70px;
}

.status-label {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 5px 9px;
  border-radius: 4px;
  background: var(--af-pink);
  color: var(--af-primary-deep);
  font-size: 11px;
  font-weight: 700;
}

.a-class-feature h3 {
  margin: 20px 0 18px;
  font-size: 35px;
  line-height: 1.35;
}

.a-class-feature__body > p {
  margin: 0;
  color: var(--af-muted);
  font-size: 15px;
}

.simple-specs {
  width: 100%;
  margin: 32px 0;
}

.simple-specs div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--af-line);
}

.simple-specs div:last-child {
  border-bottom: 1px solid var(--af-line);
}

.simple-specs dt {
  color: var(--af-muted);
  font-size: 12px;
  font-weight: 600;
}

.simple-specs dd {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
}

.a-classroom {
  padding: 130px 0;
  background: var(--af-primary-deep);
  color: var(--af-white);
}

.a-classroom__grid {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  align-items: center;
  gap: 84px;
}

.a-classroom h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.4;
}

.a-classroom__copy > p:not(.section-kicker):not(.policy-note) {
  margin: 28px 0 0;
  color: var(--af-surface-88);
  font-size: 15px;
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
}

.check-list svg {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  margin-top: 3px;
  color: var(--af-green);
}

.policy-note {
  margin: 28px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--af-surface-18);
  color: var(--af-surface-88);
  font-size: 12px;
}

.studio-player {
  overflow: hidden;
  border: 1px solid var(--af-surface-18);
  border-radius: 8px;
  background: var(--af-surface);
  color: var(--af-ink);
  box-shadow: var(--af-shadow);
}

.studio-player__top {
  display: flex;
  min-height: 50px;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--af-line);
  font-size: 10px;
  font-weight: 800;
}

.studio-player__top span:last-child {
  color: var(--af-muted);
}

.studio-player__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  min-height: 390px;
}

.studio-player__video,
.dashboard-video {
  position: relative;
  overflow: hidden;
  background: var(--af-black);
}

.studio-player__video img,
.dashboard-video img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
}

.video-preview-button {
  position: absolute;
  top: 50%;
  left: 50%;
  display: inline-flex;
  width: 58px;
  height: 58px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--af-surface-94);
  color: var(--af-primary-deep);
  transform: translate(-50%, -50%);
  transition: transform 180ms ease, background-color 180ms ease;
}

.video-preview-button:hover {
  background: var(--af-pink);
  transform: translate(-50%, -50%) scale(1.06);
}

.video-preview-button svg {
  width: 22px;
  height: 22px;
  margin-left: 3px;
}

.video-note {
  position: absolute;
  right: 14px;
  bottom: 14px;
  left: 14px;
  margin: 0;
  padding: 10px 12px;
  border-radius: 4px;
  background: var(--af-surface-94);
  color: var(--af-ink);
  font-size: 11px;
  text-align: center;
}

.studio-player__lessons {
  margin: 0;
  padding: 10px 0;
  background: var(--af-bg);
  list-style: none;
}

.studio-player__lessons li {
  display: grid;
  grid-template-columns: 27px 1fr;
  gap: 8px;
  padding: 14px 13px;
  border-left: 3px solid transparent;
}

.studio-player__lessons li.is-active {
  border-left-color: var(--af-accent);
  background: var(--af-surface);
}

.studio-player__lessons li > span {
  color: var(--af-primary);
  font-size: 10px;
  font-weight: 800;
}

.studio-player__lessons strong,
.studio-player__lessons small {
  display: block;
}

.studio-player__lessons strong {
  font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
  font-size: 11px;
}

.studio-player__lessons small {
  margin-top: 4px;
  color: var(--af-muted);
  font-size: 9px;
}

.a-materials {
  padding: 130px 0;
  background: var(--af-surface);
}

.a-materials__grid {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  align-items: center;
  gap: 96px;
}

.a-materials__content > p:not(.section-kicker) {
  margin: 26px 0 0;
  color: var(--af-muted);
  font-size: 15px;
}

.material-status {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 32px 0 18px;
  padding: 18px 0;
  border-top: 1px solid var(--af-line);
  border-bottom: 1px solid var(--af-line);
}

.material-status > svg {
  width: 30px;
  height: 30px;
  color: var(--af-primary);
}

.material-status strong,
.material-status span {
  display: block;
}

.material-status strong {
  font-size: 14px;
}

.material-status span {
  margin-top: 2px;
  color: var(--af-muted);
  font-size: 12px;
}

.material-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.material-gallery figure {
  height: 230px;
  margin: 0;
  overflow: hidden;
  border-radius: 18px 60px 18px 18px;
}

.material-gallery__wide {
  grid-column: 1 / -1;
  height: 390px !important;
  border-radius: 80px 18px 18px 18px !important;
}

.material-gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.a-about {
  padding: 120px 0;
  background: var(--af-bg-pink);
}

.a-about__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 110px;
}

.a-about__title .brand-lockup__mark {
  margin-bottom: 52px;
}

.a-about h2 {
  margin: 0;
  font-size: 43px;
  line-height: 1.35;
}

.a-about__copy {
  padding-top: 94px;
}

.a-about__copy p {
  color: var(--af-muted);
  font-size: 15px;
}

.a-about__copy .a-about__lead {
  margin-top: 0;
  color: var(--af-ink);
  font-family: "Noto Serif KR", serif;
  font-size: 22px;
  line-height: 1.7;
}

.a-about__copy .button {
  margin-top: 26px;
}

.faq-section {
  padding: 120px 0;
  background: var(--af-bg);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: 100px;
}

.faq-heading {
  position: sticky;
  top: 120px;
  align-self: start;
}

.faq-heading h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.3;
}

.faq-heading > p:last-child {
  margin: 22px 0 0;
  color: var(--af-muted);
  font-size: 14px;
}

.faq-list {
  border-top: 2px solid var(--af-ink);
}

.faq-list details {
  border-bottom: 1px solid var(--af-line-dark);
}

.faq-list summary {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  font-size: 16px;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
}

.faq-list summary::-webkit-details-marker,
.curriculum-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary svg {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  transition: transform 180ms ease;
}

.faq-list details[open] summary svg {
  transform: rotate(45deg);
}

.faq-list details > p {
  max-width: 680px;
  margin: -3px 0 0;
  padding: 0 56px 26px 0;
  color: var(--af-muted);
  font-size: 14px;
}

.closing-cta {
  padding: 110px 0;
  background: var(--af-green);
  text-align: center;
}

.closing-cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.closing-cta h2 {
  margin: 0;
  font-size: 46px;
  line-height: 1.4;
}

.closing-cta p:not(.section-kicker) {
  margin: 20px 0 28px;
  color: var(--af-primary-deep);
  font-size: 14px;
}

.site-footer {
  background: var(--af-soft-black);
  color: var(--af-white);
}

.site-footer__top,
.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.site-footer__top {
  min-height: 110px;
}

.site-footer__top nav {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
}

.site-footer__top nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--af-surface-88);
  font-size: 13px;
}

.site-footer__bottom {
  min-height: 70px;
  border-top: 1px solid var(--af-surface-18);
  color: var(--af-surface-88);
  font-size: 11px;
}

/* Concept B */
.concept-b {
  background: var(--af-surface);
}

.concept-b h1,
.concept-b h2,
.concept-b h3 {
  font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
}

.site-header--b .site-header__inner {
  min-height: 70px;
}

.main-nav--b {
  gap: 26px;
}

.b-hero {
  position: relative;
  min-height: 620px;
  height: calc(100vh - 106px);
  max-height: 730px;
  overflow: hidden;
  color: var(--af-white);
}

.b-hero__image,
.b-hero__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.b-hero__image {
  object-fit: cover;
  object-position: center 52%;
}

.b-hero__overlay {
  background: var(--af-overlay-b);
}

.b-hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  height: 100%;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 52px 0 36px;
}

.b-hero h1 {
  margin: 0;
  font-size: 62px;
  font-weight: 800;
  line-height: 1.1;
}

.b-hero__content > p:not(.hero-kicker) {
  max-width: 560px;
  margin: 24px 0 0;
  color: var(--af-surface-94);
  font-size: 17px;
}

.b-hero .hero-actions {
  margin-top: 30px;
}

.b-hero__facts {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 54px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--af-surface-18);
  list-style: none;
}

.b-hero__facts li {
  display: flex;
  align-items: center;
  gap: 13px;
  padding-right: 24px;
}

.b-hero__facts svg {
  width: 26px;
  height: 26px;
  flex: 0 0 26px;
  color: var(--af-green);
}

.b-hero__facts strong,
.b-hero__facts span {
  display: block;
}

.b-hero__facts strong {
  margin-bottom: 2px;
  font-size: 13px;
}

.b-hero__facts span {
  color: var(--af-surface-88);
  font-size: 11px;
}

.section-nav {
  position: sticky;
  top: 70px;
  z-index: 70;
  overflow-x: auto;
  border-bottom: 1px solid var(--af-line);
  background: var(--af-surface-94);
}

.section-nav__inner {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  gap: 38px;
}

.section-nav a {
  display: inline-flex;
  min-height: 54px;
  flex: 0 0 auto;
  align-items: center;
  border-bottom: 2px solid transparent;
  color: var(--af-muted);
  font-size: 12px;
  font-weight: 700;
}

.section-nav a:hover,
.section-nav a.is-current {
  border-bottom-color: var(--af-accent);
  color: var(--af-ink);
}

.b-flow {
  padding: 104px 0;
  background: var(--af-bg);
}

.purchase-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--af-ink);
  border-bottom: 1px solid var(--af-line-dark);
  list-style: none;
}

.purchase-flow li {
  position: relative;
  display: grid;
  min-height: 190px;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  align-content: center;
  padding: 28px 34px;
  border-right: 1px solid var(--af-line-dark);
}

.purchase-flow li:last-child {
  border-right: 0;
}

.purchase-flow li > span {
  position: absolute;
  top: 16px;
  right: 18px;
  color: var(--af-line-dark);
  font-size: 38px;
  font-weight: 800;
  line-height: 1;
}

.purchase-flow svg {
  width: 30px;
  height: 30px;
  color: var(--af-primary);
}

.purchase-flow strong {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
}

.purchase-flow p {
  margin: 0;
  color: var(--af-muted);
  font-size: 13px;
}

.inline-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 22px 0 0;
  color: var(--af-muted);
  font-size: 12px;
}

.inline-disclaimer svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  margin-top: 2px;
}

.b-course {
  padding: 110px 0;
  background: var(--af-surface);
}

.b-course__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 48px;
}

.b-course__head h2,
.b-fit h2,
.b-curriculum h2,
.b-shop h2 {
  margin: 0;
  font-size: 42px;
  font-weight: 800;
  line-height: 1.25;
}

.b-course__head > p {
  max-width: 370px;
  margin: 0;
  color: var(--af-muted);
  font-size: 13px;
}

.course-row {
  display: grid;
  grid-template-columns: 310px 1fr 250px;
  min-height: 410px;
  border-top: 2px solid var(--af-ink);
  border-bottom: 1px solid var(--af-line-dark);
}

.course-row__image {
  position: relative;
  overflow: hidden;
}

.course-row__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-row__image > span {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 8px;
  border-radius: 3px;
  background: var(--af-surface-94);
  color: var(--af-muted);
  font-size: 9px;
}

.course-row__main,
.course-row__meta {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 42px;
}

.course-row__main {
  border-right: 1px solid var(--af-line);
}

.course-row__labels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.course-row__labels span {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  padding: 4px 8px;
  border: 1px solid var(--af-line-dark);
  border-radius: 4px;
  color: var(--af-primary-dark);
  font-size: 10px;
  font-weight: 800;
}

.course-row__labels span:last-child {
  border-color: var(--af-pink);
  background: var(--af-pink);
}

.course-row h3 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.25;
}

.course-row__main > p {
  margin: 0;
  color: var(--af-muted);
  font-size: 14px;
}

.inline-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.inline-features li {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
}

.inline-features svg {
  width: 15px;
  height: 15px;
  color: var(--af-primary);
}

.course-row__meta dl {
  width: 100%;
  margin: 0 0 26px;
}

.course-row__meta dl div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 0;
  border-bottom: 1px solid var(--af-line);
}

.course-row__meta dt {
  color: var(--af-muted);
  font-size: 11px;
}

.course-row__meta dd {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  text-align: right;
}

.b-fit {
  padding: 105px 0;
  background: var(--af-bg-strong);
}

.b-fit__grid {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: 90px;
}

.b-fit__heading > p:last-child {
  max-width: 340px;
  margin: 22px 0 0;
  color: var(--af-muted);
  font-size: 13px;
}

.fit-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--af-ink);
  border-left: 1px solid var(--af-line-dark);
}

.fit-matrix > div {
  position: relative;
  min-height: 220px;
  padding: 34px 32px;
  border-right: 1px solid var(--af-line-dark);
  border-bottom: 1px solid var(--af-line-dark);
}

.fit-matrix > div > span {
  position: absolute;
  top: 18px;
  right: 20px;
  color: var(--af-line-dark);
  font-size: 12px;
  font-weight: 800;
}

.fit-matrix svg {
  width: 28px;
  height: 28px;
  margin-bottom: 27px;
  color: var(--af-primary);
}

.fit-matrix strong {
  display: block;
  margin-bottom: 9px;
  font-size: 16px;
}

.fit-matrix p {
  margin: 0;
  color: var(--af-muted);
  font-size: 13px;
}

.b-curriculum {
  padding: 110px 0;
  background: var(--af-surface);
}

.b-curriculum__grid {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  align-items: stretch;
  gap: 80px;
}

.b-curriculum__visual {
  position: relative;
  min-height: 670px;
  overflow: hidden;
  border-radius: 8px;
}

.b-curriculum__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
}

.b-curriculum__visual > span {
  position: absolute;
  right: 14px;
  bottom: 14px;
  left: 14px;
  padding: 10px 12px;
  border-radius: 4px;
  background: var(--af-surface-94);
  color: var(--af-muted);
  font-size: 10px;
  text-align: center;
}

.b-curriculum__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.b-curriculum__intro {
  margin: 20px 0 30px;
  color: var(--af-muted);
  font-size: 13px;
}

.curriculum-list {
  border-top: 2px solid var(--af-ink);
}

.curriculum-list details {
  border-bottom: 1px solid var(--af-line-dark);
}

.curriculum-list summary {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
}

.curriculum-list summary b {
  display: inline-block;
  width: 36px;
  color: var(--af-primary);
  font-size: 11px;
}

.curriculum-list summary svg {
  width: 18px;
  height: 18px;
  transition: transform 180ms ease;
}

.curriculum-list details[open] summary svg {
  transform: rotate(180deg);
}

.curriculum-list details > div {
  padding: 0 30px 22px 36px;
}

.curriculum-list details > div strong {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
}

.curriculum-list details > div p {
  margin: 0;
  color: var(--af-muted);
  font-size: 12px;
}

.b-classroom {
  padding: 110px 0;
  background: var(--af-bg);
}

.dashboard-preview {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 620px;
  overflow: hidden;
  border: 1px solid var(--af-line-dark);
  border-radius: 8px;
  background: var(--af-surface);
  box-shadow: var(--af-shadow-soft);
}

.dashboard-preview__sidebar {
  padding: 26px 16px;
  border-right: 1px solid var(--af-line);
  background: var(--af-primary-deep);
  color: var(--af-white);
}

.dashboard-preview__brand {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  padding: 0 10px 20px;
  border-bottom: 1px solid var(--af-surface-18);
  font-size: 11px;
}

.dashboard-tabs {
  display: grid;
  gap: 6px;
  margin-top: 22px;
}

.dashboard-tabs button {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--af-surface-88);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
}

.dashboard-tabs button:hover,
.dashboard-tabs button.is-active {
  background: var(--af-surface-12);
  color: var(--af-white);
}

.dashboard-tabs svg {
  width: 18px;
  height: 18px;
}

.dashboard-preview__main {
  min-width: 0;
  padding: 34px;
}

.dashboard-panel__head {
  display: flex;
  min-height: 70px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.dashboard-panel__head span:not(.status-label) {
  display: block;
  margin-bottom: 4px;
  color: var(--af-muted);
  font-size: 10px;
}

.dashboard-panel__head h3 {
  margin: 0;
  font-size: 24px;
}

.dashboard-video {
  height: 390px;
  border-radius: 6px;
}

.lesson-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 14px;
  border-top: 1px solid var(--af-line);
  border-bottom: 1px solid var(--af-line);
}

.lesson-strip span {
  min-height: 52px;
  padding: 16px 12px;
  border-right: 1px solid var(--af-line);
  color: var(--af-muted);
  font-size: 10px;
  text-align: center;
}

.lesson-strip span:last-child {
  border-right: 0;
}

.lesson-strip span.is-active {
  background: var(--af-bg-strong);
  color: var(--af-primary-deep);
  font-weight: 700;
}

.policy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 26px 0 0;
  padding: 0;
  border-top: 2px solid var(--af-ink);
  border-left: 1px solid var(--af-line);
  list-style: none;
}

.policy-grid li {
  display: flex;
  min-height: 180px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 26px;
  border-right: 1px solid var(--af-line);
  border-bottom: 1px solid var(--af-line);
}

.policy-grid svg {
  width: 27px;
  height: 27px;
  margin-bottom: 20px;
  color: var(--af-primary);
}

.policy-grid strong {
  font-size: 14px;
}

.policy-grid span {
  margin-top: 5px;
  color: var(--af-muted);
  font-size: 12px;
}

.material-empty {
  display: flex;
  min-height: 410px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  border: 1px dashed var(--af-line-dark);
  border-radius: 6px;
  background: var(--af-bg);
  text-align: center;
}

.material-empty > svg {
  width: 46px;
  height: 46px;
  margin-bottom: 24px;
  color: var(--af-primary);
}

.material-empty strong {
  font-size: 17px;
}

.material-empty p {
  margin: 9px 0 24px;
  color: var(--af-muted);
  font-size: 13px;
}

.b-shop {
  padding: 110px 0;
  background: var(--af-surface);
}

.b-shop__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 88px;
}

.b-shop__media {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 12px;
}

.b-shop__media figure {
  height: 500px;
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
}

.b-shop__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.b-shop__content > p:not(.section-kicker) {
  margin: 22px 0 0;
  color: var(--af-muted);
  font-size: 14px;
}

.shop-readiness {
  margin: 30px 0;
  border-top: 2px solid var(--af-ink);
}

.shop-readiness div {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 15px 0;
  border-bottom: 1px solid var(--af-line);
}

.shop-readiness dt {
  color: var(--af-muted);
  font-size: 12px;
}

.shop-readiness dd {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
}

.b-about {
  padding: 78px 0;
  background: var(--af-bg-strong);
}

.b-about__inner {
  display: grid;
  grid-template-columns: 0.55fr 1fr auto;
  align-items: center;
  gap: 64px;
}

.b-about h2 {
  margin: 0;
  font-size: 32px;
}

.b-about__inner > p {
  margin: 0;
  color: var(--af-muted);
  font-size: 14px;
}

.faq-section--b {
  background: var(--af-surface);
}

.b-closing {
  padding: 88px 0;
  background: var(--af-primary-deep);
  color: var(--af-white);
}

.b-closing__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.b-closing h2 {
  max-width: 760px;
  margin: 0;
  font-size: 36px;
  line-height: 1.35;
}

@media (max-width: 1100px) {
  .main-nav {
    gap: 20px;
  }

  .main-nav a {
    font-size: 13px;
  }

  .a-hero h1,
  .b-hero h1 {
    font-size: 54px;
  }

  .a-for__grid,
  .a-materials__grid {
    gap: 60px;
  }

  .a-classroom__grid {
    gap: 50px;
  }

  .course-row {
    grid-template-columns: 260px 1fr 225px;
  }

  .course-row__main,
  .course-row__meta {
    padding: 30px;
  }

  .b-curriculum__grid,
  .b-shop__grid {
    gap: 50px;
  }
}

@media (max-width: 960px) {
  html {
    scroll-padding-top: 128px;
  }

  .site-container {
    width: calc(100% - 40px);
  }

  .site-header__inner,
  .site-header--b .site-header__inner {
    min-height: 70px;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: -20px;
    left: -20px;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 14px 20px 20px;
    border-bottom: 1px solid var(--af-line);
    background: var(--af-surface);
    box-shadow: var(--af-shadow-soft);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    min-height: 50px;
    border-bottom: 1px solid var(--af-line);
    font-size: 14px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .button--header {
    display: none;
  }

  .section-heading h2,
  .a-opening h2,
  .a-for h2,
  .a-materials h2,
  .b-course__head h2,
  .b-fit h2,
  .b-curriculum h2,
  .b-shop h2 {
    font-size: 38px;
  }

  .overview-intro__grid {
    gap: 60px;
  }

  .overview-intro h1 {
    font-size: 50px;
  }

  .concept-card__media {
    height: 420px;
  }

  .a-opening__grid {
    grid-template-columns: 30px 1fr 0.8fr;
    gap: 34px;
  }

  .a-for__grid,
  .a-classroom__grid,
  .a-materials__grid,
  .a-about__grid,
  .b-curriculum__grid,
  .b-shop__grid {
    grid-template-columns: 1fr;
  }

  .a-for__grid,
  .a-materials__grid,
  .a-about__grid,
  .b-shop__grid {
    gap: 70px;
  }

  .a-collage {
    min-height: 650px;
  }

  .a-for__content {
    max-width: 680px;
  }

  .a-class-feature {
    grid-template-columns: 1fr;
  }

  .a-class-feature__image {
    min-height: 460px;
  }

  .a-class-feature__body {
    padding: 54px 30px;
  }

  .a-classroom__copy {
    max-width: 660px;
  }

  .studio-player__layout {
    min-height: 470px;
  }

  .a-about__copy {
    padding-top: 0;
  }

  .a-about__title .brand-lockup__mark {
    margin-bottom: 34px;
  }

  .b-fit__grid {
    grid-template-columns: 0.72fr 1.28fr;
    gap: 48px;
  }

  .course-row {
    grid-template-columns: 260px 1fr;
  }

  .course-row__meta {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 34px;
    border-top: 1px solid var(--af-line);
  }

  .course-row__main {
    border-right: 0;
  }

  .course-row__meta dl {
    margin: 0;
  }

  .b-curriculum__visual {
    min-height: 540px;
  }

  .b-curriculum__content {
    max-width: 760px;
  }

  .b-shop__media figure {
    height: 420px;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 15px;
  }

  .site-container {
    width: calc(100% - 32px);
  }

  .section-heading--row,
  .b-course__head {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
  }

  .section-heading {
    margin-bottom: 40px;
  }

  .section-heading h2,
  .a-opening h2,
  .a-for h2,
  .a-materials h2,
  .b-course__head h2,
  .b-fit h2,
  .b-curriculum h2,
  .b-shop h2 {
    font-size: 32px;
  }

  .announcement-bar__inner,
  .b-utility__inner {
    min-height: 34px;
  }

  .announcement-bar__inner > span,
  .b-utility__inner > span {
    display: none;
  }

  .announcement-bar__inner,
  .b-utility__inner {
    justify-content: flex-end;
  }

  .site-header__inner,
  .site-header--b .site-header__inner {
    min-height: 66px;
  }

  .brand-lockup {
    font-size: 17px;
  }

  .brand-lockup--compact {
    font-size: 12px;
  }

  .header-actions > .icon-button:not(.menu-toggle) {
    display: none;
  }

  .overview-header__inner {
    min-height: 68px;
  }

  .overview-header__meta {
    display: none;
  }

  .overview-intro {
    padding: 72px 0 60px;
  }

  .overview-intro__grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .overview-intro h1 {
    font-size: 42px;
  }

  .concept-picker {
    padding-bottom: 80px;
  }

  .concept-picker__grid {
    grid-template-columns: 1fr;
  }

  .concept-card__media {
    height: 430px;
  }

  .concept-comparison {
    padding: 80px 0;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 16px;
  }

  .a-hero,
  .b-hero {
    min-height: 650px;
    height: calc(100vh - 100px);
    max-height: 720px;
  }

  .a-hero h1,
  .b-hero h1 {
    font-size: 44px;
  }

  .a-hero h1 span {
    font-size: 17px;
  }

  .a-hero__lead,
  .b-hero__content > p:not(.hero-kicker) {
    font-size: 15px;
  }

  .hero-actions {
    gap: 16px;
    margin-top: 28px;
  }

  .a-hero__foot {
    min-height: 58px;
    gap: 14px;
    font-size: 10px;
  }

  .a-hero__content {
    height: calc(100% - 58px);
  }

  .a-opening,
  .a-for,
  .a-process,
  .a-classroom,
  .a-materials,
  .a-about,
  .faq-section,
  .b-flow,
  .b-course,
  .b-fit,
  .b-curriculum,
  .b-classroom,
  .b-shop {
    padding: 88px 0;
  }

  .a-opening__grid {
    grid-template-columns: 1fr;
  }

  .vertical-label {
    display: none;
  }

  .a-opening__copy {
    padding-top: 0;
  }

  .a-collage {
    min-height: 530px;
  }

  .a-collage__main {
    inset: 0 10% 62px 0;
  }

  .a-collage__accent {
    width: 43%;
    height: 230px;
  }

  .process-line {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-line li:nth-child(2) {
    border-right: 0;
  }

  .process-line li:nth-child(n+3) {
    border-top: 1px solid var(--af-line);
  }

  .a-class-feature {
    margin-top: 64px;
  }

  .a-class-feature__image {
    min-height: 390px;
  }

  .a-class-feature h3 {
    font-size: 29px;
  }

  .a-classroom h2,
  .a-about h2,
  .faq-heading h2 {
    font-size: 34px;
  }

  .studio-player__layout {
    grid-template-columns: 1fr;
  }

  .studio-player__video {
    min-height: 360px;
  }

  .studio-player__lessons {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .studio-player__lessons li {
    min-height: 70px;
  }

  .material-gallery__wide {
    height: 340px !important;
  }

  .material-gallery figure:not(.material-gallery__wide) {
    height: 190px;
  }

  .a-about__grid {
    gap: 46px;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .faq-heading {
    position: static;
  }

  .closing-cta {
    padding: 82px 0;
  }

  .closing-cta h2 {
    font-size: 36px;
  }

  .site-footer__top {
    align-items: flex-start;
    flex-direction: column;
    padding: 38px 0 26px;
  }

  .site-footer__bottom {
    min-height: 80px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 3px;
  }

  .section-nav {
    top: 66px;
  }

  .section-nav__inner {
    width: max-content;
    min-width: 100%;
    justify-content: flex-start;
    gap: 26px;
  }

  .b-hero__facts {
    margin-top: 36px;
  }

  .b-hero__facts li {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding-right: 12px;
  }

  .b-hero__facts svg {
    width: 22px;
    height: 22px;
  }

  .purchase-flow {
    grid-template-columns: 1fr;
  }

  .purchase-flow li {
    min-height: 150px;
    border-right: 0;
    border-bottom: 1px solid var(--af-line-dark);
  }

  .purchase-flow li:last-child {
    border-bottom: 0;
  }

  .course-row {
    grid-template-columns: 1fr;
  }

  .course-row__image {
    height: 420px;
  }

  .course-row__main {
    border-top: 1px solid var(--af-line);
  }

  .course-row__meta {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .b-fit__grid {
    grid-template-columns: 1fr;
  }

  .fit-matrix > div {
    min-height: 200px;
  }

  .b-curriculum__visual {
    min-height: 520px;
  }

  .dashboard-preview {
    grid-template-columns: 1fr;
  }

  .dashboard-preview__sidebar {
    border-right: 0;
  }

  .dashboard-preview__brand {
    padding-bottom: 14px;
  }

  .dashboard-tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 14px;
  }

  .dashboard-tabs button {
    justify-content: center;
    padding: 8px;
    text-align: center;
  }

  .dashboard-tabs button svg {
    display: none;
  }

  .dashboard-preview__main {
    padding: 24px;
  }

  .dashboard-video {
    height: 340px;
  }

  .lesson-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-strip span:nth-child(2) {
    border-right: 0;
  }

  .lesson-strip span:nth-child(n+3) {
    border-top: 1px solid var(--af-line);
  }

  .b-shop__media figure {
    height: 360px;
  }

  .b-about__inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .b-closing {
    padding: 72px 0;
  }

  .b-closing__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .b-closing h2 {
    font-size: 31px;
  }
}

@media (max-width: 520px) {
  .section-kicker,
  .hero-kicker {
    margin-bottom: 13px;
  }

  .button {
    padding-right: 17px;
    padding-left: 17px;
  }

  .overview-intro h1 {
    font-size: 36px;
  }

  .concept-card__media {
    height: 360px;
  }

  .concept-card__body {
    min-height: 145px;
    padding: 22px 20px;
  }

  .concept-card__body h2 {
    font-size: 24px;
  }

  .comparison-table {
    min-width: 0;
    table-layout: fixed;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 12px 7px;
    font-size: 11px;
    overflow-wrap: anywhere;
  }

  .comparison-table thead th {
    font-size: 10px;
  }

  .comparison-table tbody th {
    width: 25%;
  }

  .a-hero,
  .b-hero {
    min-height: 650px;
    height: calc(100vh - 100px);
    max-height: 720px;
  }

  .a-hero__image {
    object-position: 55% 45%;
  }

  .b-hero__image {
    object-position: 54% 50%;
  }

  .b-hero h1 {
    font-size: 38px;
  }

  .a-hero h1 {
    font-size: 34px;
  }

  .a-hero__lead {
    max-width: 340px;
  }

  .hero-actions {
    width: 100%;
    align-items: stretch;
    flex-direction: column;
    gap: 9px;
  }

  .hero-actions .button,
  .hero-actions .text-link {
    width: 100%;
    justify-content: center;
  }

  .b-hero .hero-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .b-hero .hero-actions .button {
    min-width: 0;
    padding: 11px 10px;
    font-size: 12px;
  }

  .a-hero__foot {
    justify-content: space-between;
    gap: 8px;
  }

  .a-hero__foot span {
    gap: 5px;
  }

  .a-opening,
  .a-for,
  .a-process,
  .a-classroom,
  .a-materials,
  .a-about,
  .faq-section,
  .b-flow,
  .b-course,
  .b-fit,
  .b-curriculum,
  .b-classroom,
  .b-shop {
    padding: 72px 0;
  }

  .a-collage {
    min-height: 430px;
  }

  .a-collage__main {
    inset: 0 7% 50px 0;
    border-radius: 72px 14px 14px 14px;
  }

  .a-collage__accent {
    width: 44%;
    height: 180px;
    border-width: 7px;
    border-radius: 14px 62px 14px 14px;
  }

  .editorial-list li {
    grid-template-columns: 34px 1fr;
    gap: 10px;
  }

  .process-line {
    grid-template-columns: 1fr;
  }

  .process-line li,
  .process-line li:not(:first-child) {
    min-height: 170px;
    padding: 28px 0;
    border-right: 0;
    border-bottom: 1px solid var(--af-line);
  }

  .process-line li:not(:first-child)::before {
    left: 0;
  }

  .process-line span {
    margin-bottom: 20px;
  }

  .a-class-feature__image {
    min-height: 330px;
  }

  .a-class-feature__body {
    padding: 42px 0;
  }

  .simple-specs div {
    grid-template-columns: 76px 1fr;
  }

  .a-classroom h2,
  .a-about h2,
  .faq-heading h2 {
    font-size: 31px;
  }

  .studio-player__video {
    min-height: 260px;
  }

  .studio-player__lessons {
    grid-template-columns: 1fr;
  }

  .material-gallery__wide {
    height: 290px !important;
  }

  .material-gallery figure:not(.material-gallery__wide) {
    height: 150px;
    border-radius: 12px 40px 12px 12px;
  }

  .a-about__copy .a-about__lead {
    font-size: 19px;
  }

  .faq-list summary {
    min-height: 70px;
    font-size: 14px;
  }

  .faq-list details > p {
    padding-right: 28px;
  }

  .closing-cta h2 {
    font-size: 31px;
  }

  .site-footer__top nav {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 20px;
  }

  .b-hero__facts {
    gap: 8px;
  }

  .b-hero__facts li {
    padding-right: 4px;
  }

  .b-hero__facts strong {
    font-size: 11px;
  }

  .b-hero__facts span {
    font-size: 9px;
  }

  .course-row__image {
    height: 330px;
  }

  .course-row__main,
  .course-row__meta {
    padding: 28px 0;
  }

  .course-row h3 {
    font-size: 26px;
  }

  .fit-matrix {
    grid-template-columns: 1fr;
  }

  .fit-matrix > div {
    min-height: 170px;
  }

  .b-curriculum__visual {
    min-height: 420px;
  }

  .curriculum-list summary {
    font-size: 14px;
  }

  .dashboard-preview__main {
    padding: 18px;
  }

  .dashboard-panel__head {
    min-height: 86px;
    flex-direction: column;
    gap: 8px;
  }

  .dashboard-video {
    height: 260px;
  }

  .lesson-strip {
    grid-template-columns: 1fr;
  }

  .lesson-strip span,
  .lesson-strip span:nth-child(2) {
    border-right: 0;
    border-top: 1px solid var(--af-line);
  }

  .lesson-strip span:first-child {
    border-top: 0;
  }

  .policy-grid {
    grid-template-columns: 1fr;
  }

  .policy-grid li {
    min-height: 145px;
  }

  .material-empty {
    min-height: 330px;
    padding: 28px 18px;
  }

  .b-shop__media {
    gap: 8px;
  }

  .b-shop__media figure {
    height: 300px;
  }

  .b-closing h2 {
    font-size: 28px;
  }

  .preview-switcher {
    right: 12px;
    bottom: 12px;
  }

  .toast {
    right: 12px;
    bottom: 68px;
    left: 12px;
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}