:root {
  --ink: #15202b;
  --ink-soft: #3a4654;
  --muted: #6b7785;
  --line: #d8dde4;
  --paper: #f4f6f8;
  --surface: #ffffff;
  --accent: #9a7b4f;
  --accent-deep: #7a6040;
  --accent-soft: #e8dfd2;
  --mist: #e6ebf0;
  --success: #2f6b4f;
  --error: #9b3a3a;
  --shadow: 0 18px 40px rgba(21, 32, 43, 0.08);
  --radius: 2px;
  --header-h: 72px;
  --font-display: "Cormorant Garamond", "Noto Serif KR", serif;
  --font-serif: "Noto Serif KR", "Cormorant Garamond", serif;
  --font-sans: "Noto Sans KR", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(154, 123, 79, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(21, 32, 43, 0.06), transparent 50%),
    linear-gradient(180deg, #eef1f4 0%, var(--paper) 40%, #e9edf2 100%);
  min-height: 100vh;
}

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

a {
  color: var(--accent-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--ink);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4.5vw, 3.4rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

p { margin: 0 0 1em; color: var(--ink-soft); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.container-narrow {
  width: min(760px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(244, 246, 248, 0.86);
  border-bottom: 1px solid rgba(216, 221, 228, 0.7);
}

.header-inner {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--accent);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  box-shadow: inset 0 0 0 3px rgba(154, 123, 79, 0.2);
}

.brand-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  font-weight: 600;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.92rem;
  transition: color 0.25s var(--ease);
}

.site-nav a:hover {
  color: var(--ink);
}

.site-nav .nav-cta {
  color: var(--surface);
  background: var(--ink);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
}

.site-nav .nav-cta:hover {
  background: var(--accent-deep);
  color: var(--surface);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

/* Hero variants */
.hero-editorial {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: stretch;
  overflow: hidden;
}

.hero-copy {
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1.25rem, 4vw, 3.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.72), rgba(244,246,248,0.4));
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  line-height: 0.95;
  margin: 0 0 1.25rem;
  color: var(--ink);
  letter-spacing: -0.02em;
  animation: rise 0.9s var(--ease) both;
}

.hero-line {
  width: 48px;
  height: 1px;
  background: var(--accent);
  margin-bottom: 1.4rem;
  animation: rise 0.9s 0.1s var(--ease) both;
}

.hero-lede {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  color: var(--ink);
  max-width: 28ch;
  margin-bottom: 1rem;
  animation: rise 0.9s 0.15s var(--ease) both;
}

.hero-support {
  max-width: 36ch;
  color: var(--muted);
  margin-bottom: 2rem;
  animation: rise 0.9s 0.2s var(--ease) both;
}

.hero-media {
  position: relative;
  min-height: 420px;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: softZoom 12s ease-in-out infinite alternate;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(238,241,244,0.35), transparent 35%);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: var(--surface);
}

.btn-primary:hover {
  background: var(--accent-deep);
  color: var(--surface);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.btn-text {
  background: none;
  border: none;
  color: var(--accent-deep);
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

/* Sections */
.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.55);
  border-block: 1px solid rgba(216, 221, 228, 0.6);
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
}

/* Proof strip */
.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 2rem 0;
  border-block: 1px solid var(--line);
  margin: 0 auto;
  width: min(1120px, calc(100% - 2.5rem));
}

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.1;
}

.proof-item span {
  color: var(--muted);
  font-size: 0.92rem;
}

/* Feature / course grids */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.split-reverse .split-media { order: 2; }

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}

.media-frame:hover img {
  transform: scale(1.03);
}

.benefit-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1rem;
}

.benefit-list li {
  padding-left: 1.4rem;
  position: relative;
  color: var(--ink-soft);
}

.benefit-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 1px;
  background: var(--accent);
}

.program-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.program-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.35s var(--ease), transform 0.35s var(--ease);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.program-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.program-item img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.program-body {
  padding: 1.25rem 1.35rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.program-body h3 {
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.program-body p {
  flex: 1;
  font-size: 0.95rem;
}

.program-meta {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--accent-deep);
}

/* Quotes */
.quote-stack {
  display: grid;
  gap: 1.5rem;
}

.quote {
  background: var(--surface);
  border-left: 2px solid var(--accent);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow);
}

.quote p {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  color: var(--ink);
  margin-bottom: 0.85rem;
}

.quote footer {
  font-size: 0.88rem;
  color: var(--muted);
}

.quote-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.25rem;
}

.quote-grid .quote:nth-child(2) {
  align-self: end;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  align-items: stretch;
}

.price-tier {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 2rem 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.price-tier.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-6px);
}

.price-tier h3 {
  margin: 0;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--ink);
  margin: 0.25rem 0;
}

.price-amount span {
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--muted);
}

.price-tier ul {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 1.25rem;
  flex: 1;
}

.price-tier li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--mist);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Forms */
.form-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  color: var(--ink);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: inherit;
  background: #fbfcfd;
  color: var(--ink);
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group .error-msg {
  display: none;
  color: var(--error);
  font-size: 0.85rem;
  margin-top: 0.35rem;
}

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: var(--error);
}

.form-group.has-error .error-msg {
  display: block;
}

.form-status {
  display: none;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.form-status.success {
  display: block;
  background: rgba(47, 107, 79, 0.1);
  color: var(--success);
  border: 1px solid rgba(47, 107, 79, 0.25);
}

.form-status.error {
  display: block;
  background: rgba(155, 58, 58, 0.08);
  color: var(--error);
  border: 1px solid rgba(155, 58, 58, 0.25);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2rem;
  align-items: start;
}

.contact-details p {
  margin-bottom: 0.6rem;
}

.address-block {
  background: var(--accent-soft);
  padding: 1.25rem;
  border-radius: var(--radius);
  margin: 1rem 0;
  font-size: 0.95rem;
  color: var(--ink);
  line-height: 1.6;
}

/* Blog */
.blog-list {
  display: grid;
  gap: 1.5rem;
}

.blog-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.3s var(--ease);
}

.blog-card:hover {
  box-shadow: var(--shadow);
}

.blog-card img {
  width: 100%;
  height: 100%;
  min-height: 160px;
  object-fit: cover;
}

.blog-card-body {
  padding: 1.25rem 1.25rem 1.25rem 0;
}

.blog-card-body time {
  font-size: 0.82rem;
  color: var(--muted);
}

.article-hero {
  margin-bottom: 2rem;
}

.article-hero img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius);
}

.article-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.prose h2 {
  margin-top: 2rem;
}

.prose ul, .prose ol {
  color: var(--ink-soft);
  padding-left: 1.25rem;
}

.prose li { margin-bottom: 0.4rem; }

/* Legal */
.legal-page h2 {
  margin-top: 2.25rem;
}

.legal-page table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

.legal-page th,
.legal-page td {
  border: 1px solid var(--line);
  padding: 0.7rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.legal-page th {
  background: var(--mist);
  color: var(--ink);
}

/* Page hero (inner) */
.page-hero {
  padding: clamp(3rem, 7vw, 5rem) 0 2rem;
}

.page-hero h1 {
  max-width: 18ch;
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 0.75rem;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1rem 1.25rem;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--ink);
  list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--accent);
}

.faq-item[open] summary::after { content: "–"; }

.faq-item p {
  margin: 0.85rem 0 0.25rem;
}

/* Modules */
.module-list {
  counter-reset: mod;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.module-list li {
  counter-increment: mod;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1.15rem 1.25rem 1.15rem 4rem;
  position: relative;
}

.module-list li::before {
  content: counter(mod, decimal-leading-zero);
  position: absolute;
  left: 1.1rem;
  top: 1.15rem;
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 1.1rem;
}

/* CTA band */
.cta-band {
  text-align: center;
  padding: clamp(3rem, 7vw, 5rem) 1.25rem;
  background:
    linear-gradient(120deg, rgba(21,32,43,0.94), rgba(61,52,40,0.92)),
    var(--ink);
  color: #f5f2ec;
}

.cta-band h2 { color: #f5f2ec; }
.cta-band p { color: rgba(245, 242, 236, 0.78); max-width: 36rem; margin-inline: auto; }
.cta-band .btn-primary {
  background: var(--accent);
  color: var(--ink);
}
.cta-band .btn-primary:hover {
  background: #d4b88a;
}

/* 404 */
.page-404 {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 1.25rem;
}

.page-404 .code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--accent);
  line-height: 1;
  margin: 0;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 200;
  max-width: 640px;
  margin-inline: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.35rem;
  display: none;
  animation: rise 0.5s var(--ease);
}

.cookie-banner.is-visible { display: block; }

.cookie-banner p {
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.inline-error {
  background: rgba(155, 58, 58, 0.08);
  color: var(--error);
  border: 1px solid rgba(155, 58, 58, 0.2);
  padding: 0.75rem 1rem;
  margin: 0.5rem 0;
  font-size: 0.9rem;
  display: none;
}

.inline-error.is-visible { display: block; }

/* Footer */
.site-footer {
  background: var(--ink);
  color: rgba(244, 246, 248, 0.78);
  padding: 3.5rem 0 1.5rem;
  margin-top: 2rem;
}

.footer-grid {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 2rem;
}

.footer-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: #f4f6f8;
  margin: 0 0 0.4rem;
}

.footer-tag {
  color: rgba(244, 246, 248, 0.6);
  margin: 0;
  font-size: 0.92rem;
}

.footer-label {
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 0.85rem;
}

.footer-col a {
  display: block;
  color: rgba(244, 246, 248, 0.75);
  text-decoration: none;
  margin-bottom: 0.45rem;
  font-size: 0.92rem;
}

.footer-col a:hover { color: #fff; }

.footer-address {
  font-size: 0.88rem;
  line-height: 1.55;
  color: rgba(244, 246, 248, 0.7);
  margin-bottom: 0.75rem;
}

.footer-bottom {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 2.5rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(244, 246, 248, 0.5);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal a {
  color: rgba(244, 246, 248, 0.6);
  text-decoration: none;
  font-size: 0.85rem;
}

.footer-legal a:hover { color: #fff; }

/* Case study */
.case-study {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.case-study h3 { margin-top: 0; }

.stars {
  color: var(--accent);
  letter-spacing: 0.1em;
  font-size: 0.9rem;
}

/* Reveal animation */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

@keyframes softZoom {
  from { transform: scale(1); }
  to { transform: scale(1.05); }
}

/* Course detail meta */
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 1.25rem 0 2rem;
  padding: 1rem 0;
  border-block: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}

.meta-row strong {
  display: block;
  color: var(--ink);
  font-weight: 500;
}

.instructor {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.25rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1.25rem;
}

.instructor img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
}

/* Responsive */
@media (max-width: 960px) {
  .hero-editorial,
  .split,
  .split-reverse .split-media,
  .program-grid,
  .pricing-grid,
  .quote-grid,
  .contact-layout,
  .footer-grid,
  .proof-strip,
  .blog-card {
    grid-template-columns: 1fr;
  }

  .split-reverse .split-media { order: 0; }
  .price-tier.featured { transform: none; }
  .blog-card img { aspect-ratio: 16 / 9; max-height: 220px; }
  .blog-card-body { padding: 0 1.25rem 1.25rem; }
}

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(244, 246, 248, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 1rem 1.25rem 1.25rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }

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

  .header-inner { position: relative; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}