:root {
  --bg: #ffffff;
  --bg-soft: #f4f7f6;
  --bg-tint: #eaf3f1;
  --text: #1b2430;
  --text-muted: #5a6878;
  --accent: #1a7a6d;
  --accent-hover: #146357;
  --accent-soft: #d7efe9;
  --border: #dce4e8;
  --shadow: 0 12px 40px rgba(27, 36, 48, 0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --font-display: "Noto Serif KR", "Iowan Old Style", Georgia, serif;
  --font-body: "Noto Sans KR", "Segoe UI", sans-serif;
  --max: 1120px;
  --header-h: 72px;
  --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-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 100% -10%, rgba(26, 122, 109, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 40% at 0% 20%, rgba(26, 122, 109, 0.05), transparent 50%),
    var(--bg);
  min-height: 100vh;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.2s var(--ease);
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2rem, 4.2vw, 3.25rem); }
h2 { font-size: clamp(1.55rem, 2.8vw, 2.15rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; }

ul, ol { margin: 0 0 1em; padding-left: 1.2em; }

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 0.98rem;
}

.brand-mark {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.45rem;
  background: linear-gradient(145deg, var(--accent), #2a9d8f);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.25);
}

.brand-text {
  font-family: var(--font-body);
  letter-spacing: -0.01em;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg);
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--text);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-toggle-bar { top: 50%; }
.nav-toggle-bar::before { top: -6px; }
.nav-toggle-bar::after { top: 6px; }

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.15rem 1.15rem;
  margin: 0;
  padding: 0;
}

.nav-list a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--accent);
}

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
}

.nav-cta:hover {
  background: var(--accent-hover);
  color: #fff !important;
}

.site-main {
  min-height: 60vh;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3.5rem, 8vw, 6.5rem) 0 clamp(3rem, 6vw, 5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: end;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.1;
  margin: 0 0 1.2rem;
  color: var(--text);
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 34rem;
  margin-bottom: 1.75rem;
}

.hero-visual {
  position: relative;
  min-height: 340px;
}

.hero-visual img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: 0;
}

.hero-fullbleed {
  padding: 0;
}

.hero-fullbleed .hero-media {
  position: relative;
  min-height: min(72vh, 640px);
  display: grid;
  align-items: end;
  background: #0f2e2a;
}

.hero-fullbleed .hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero-fullbleed .hero-copy {
  position: relative;
  z-index: 1;
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: 4rem 0 3.5rem;
  color: #fff;
}

.hero-fullbleed .hero-brand,
.hero-fullbleed h1 {
  color: #fff;
}

.hero-fullbleed .hero-lead {
  color: rgba(255, 255, 255, 0.88);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

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

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

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

.section {
  padding: clamp(3.2rem, 6vw, 5.5rem) 0;
}

.section-soft {
  background: var(--bg-soft);
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.25rem;
}

.section-head p {
  color: var(--text-muted);
  margin: 0;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.65rem;
}

.benefit-list {
  display: grid;
  gap: 1.75rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.benefit-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.benefit-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
  padding-top: 0.15rem;
}

.benefit-list h3 {
  margin-bottom: 0.35rem;
}

.benefit-list p {
  margin: 0;
  color: var(--text-muted);
}

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

.course-card,
.post-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.25rem;
  transition: opacity 0.2s var(--ease);
}

.course-card:hover,
.post-card:hover {
  opacity: 0.88;
}

.course-card img,
.post-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  margin-bottom: 1rem;
}

.course-card h3,
.post-card h3 {
  color: var(--text);
  margin-bottom: 0.4rem;
}

.meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.quote-block {
  border-left: 3px solid var(--accent);
  padding: 0.25rem 0 0.25rem 1.25rem;
  margin: 0;
}

.quote-block p {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.quote-block cite {
  font-style: normal;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  text-align: left;
}

.proof-strip strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

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

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

.price-tier {
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

.price-tier.featured {
  border-color: var(--accent);
  background: var(--bg-tint);
}

.price-tier h3 {
  margin-bottom: 0.35rem;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2rem;
  margin: 0.75rem 0 1rem;
}

.price-tier ul {
  flex: 1;
  color: var(--text-muted);
  padding-left: 1.1em;
}

.price-tier .btn {
  margin-top: 1.25rem;
  width: 100%;
}

.form {
  display: grid;
  gap: 1.1rem;
  max-width: 36rem;
}

.form-field {
  display: grid;
  gap: 0.4rem;
}

.form-field label {
  font-weight: 600;
  font-size: 0.92rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  font: inherit;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.field-error {
  color: #b42318;
  font-size: 0.85rem;
  min-height: 1.2em;
}

.form-status {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  display: none;
}

.form-status.is-success {
  display: block;
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.form-status.is-error {
  display: block;
  background: #fdecea;
  color: #b42318;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
}

.contact-aside {
  background: var(--bg-soft);
  padding: 1.75rem;
  border-radius: var(--radius);
}

.contact-aside h2 {
  font-size: 1.2rem;
}

.legal-page,
.article-page {
  padding: 3rem 0 4.5rem;
}

.legal-page .container,
.article-page .container {
  max-width: 760px;
}

.legal-page h2,
.article-page h2 {
  margin-top: 2rem;
}

.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.7rem 0.85rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--bg-soft);
}

.site-footer {
  background: #132029;
  color: rgba(255, 255, 255, 0.78);
  padding: 3.5rem 0 2rem;
  margin-top: 2rem;
}

.footer-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.footer-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #fff;
  margin-bottom: 0.5rem;
}

.footer-tag {
  max-width: 28rem;
  margin-bottom: 2rem;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.footer-heading {
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 0.85rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 0.45rem;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
}

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

.footer-contact p {
  font-size: 0.88rem;
  margin-bottom: 0.65rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.25rem;
  font-size: 0.85rem;
}

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 200;
  max-width: 420px;
  margin-left: auto;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  display: none;
}

.cookie-banner.is-visible {
  display: block;
  animation: rise 0.45s var(--ease);
}

.cookie-banner p {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.page-hero {
  padding: 3rem 0 1.5rem;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 40rem;
}

.modules {
  display: grid;
  gap: 1rem;
}

.module {
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.module h3 {
  margin-bottom: 0.35rem;
}

.instructor {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.25rem;
  align-items: center;
}

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

.faq details {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq details p {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
}

.review-list {
  display: grid;
  gap: 1.75rem;
}

.review-item {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.review-item .stars {
  color: var(--accent);
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.case-study {
  background: var(--bg-soft);
  padding: 1.75rem;
  border-radius: var(--radius);
  margin-top: 1.5rem;
}

.case-study h3 {
  margin-bottom: 0.75rem;
}

.split-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.inline-error {
  background: #fdecea;
  color: #b42318;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
}

.not-found {
  text-align: center;
  padding: 6rem 0;
}

.not-found h1 {
  font-size: 4rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 900px) {
  .hero-grid,
  .card-grid,
  .pricing-grid,
  .proof-strip,
  .contact-layout,
  .footer-cols,
  .split-2 {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.25rem 1.25rem;
    display: none;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }

  .hero-visual img {
    height: 280px;
  }

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