:root {
  --bg: #ffffff;
  --bg-soft: #f6f9f8;
  --bg-muted: #eef4f2;
  --ink: #1a2b28;
  --ink-soft: #4a5f5a;
  --line: #d7e4df;
  --accent: #1a6b5c;
  --accent-soft: #b8e0d5;
  --accent-deep: #0f4a3f;
  --warn: #9a4a3a;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(26, 43, 40, 0.08);
  --font-sans: "IBM Plex Sans KR", "Noto Sans KR", sans-serif;
  --font-display: "Fraunces", "IBM Plex Sans KR", serif;
  --max: 1120px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 1rem;
  min-height: 100vh;
}

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

a {
  color: var(--accent-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.5vw, 3.4rem);
  font-weight: 550;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.25rem);
}

h3 {
  font-size: 1.2rem;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--accent) 0%, #2f9f88 100%);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.25);
}

.logo-text {
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}

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

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.55rem 1rem;
  border-radius: 999px;
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 10px;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

main {
  overflow: clip;
}

.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4rem);
  background:
    radial-gradient(ellipse 80% 60% at 90% 10%, rgba(184, 224, 213, 0.55), transparent 55%),
    linear-gradient(180deg, #f8fbfa 0%, #ffffff 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: end;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin: 0 0 1.25rem;
}

.hero-lead {
  font-size: 1.1rem;
  max-width: 34ch;
  margin-bottom: 1.75rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 0.9rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.25s ease, background 0.25s ease;
}

.hero-cta:hover {
  background: var(--accent-deep);
  color: #fff;
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  min-height: 340px;
  box-shadow: var(--shadow);
  animation: rise-in 0.9s ease both;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 340px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

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

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

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

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

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

.section {
  padding: clamp(3.5rem, 7vw, 5.5rem) 0;
}

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

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

.section-head p {
  font-size: 1.05rem;
}

.proof-bar {
  border-block: 1px solid var(--line);
  padding: 1.75rem 0;
  background: #fff;
}

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

.proof-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent-deep);
  margin: 0;
}

.proof-label {
  margin: 0.25rem 0 0;
  font-size: 0.92rem;
}

.feature-course {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.feature-course img {
  border-radius: 16px;
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.benefit-list {
  display: grid;
  gap: 1.25rem;
}

.benefit-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}

.benefit-item:first-child {
  border-top: 1px solid var(--line);
}

.benefit-index {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 1.3rem;
  min-width: 2rem;
}

.course-grid,
.card-grid,
.blog-grid,
.tier-grid {
  display: grid;
  gap: 1.5rem;
}

.course-grid,
.blog-grid {
  grid-template-columns: repeat(3, 1fr);
}

.tier-grid {
  grid-template-columns: repeat(3, 1fr);
  align-items: stretch;
}

.media-card,
.tier,
.review-card,
.faq-item {
  background: #fff;
}

.media-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.media-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

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

.media-card-body {
  padding: 1.25rem 1.35rem 1.5rem;
}

.media-card h3 {
  margin-bottom: 0.4rem;
}

.media-card h3 a {
  text-decoration: none;
  color: var(--ink);
}

.media-card h3 a:hover {
  color: var(--accent);
}

.meta {
  font-size: 0.85rem;
  color: #6b807a;
  margin-bottom: 0.5rem;
}

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

.quote {
  background: var(--bg-muted);
  border-radius: 16px;
  padding: 1.75rem;
}

.quote p {
  font-size: 1.05rem;
  color: var(--ink);
}

.quote footer {
  margin-top: 1.25rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.cta-band {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent));
  color: #fff;
  border-radius: 20px;
  padding: clamp(2rem, 5vw, 3rem);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
}

.cta-band h2,
.cta-band p {
  color: #fff;
  margin: 0;
}

.cta-band p {
  opacity: 0.9;
  margin-top: 0.5rem;
  max-width: 36ch;
}

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

.cta-band .btn-primary:hover {
  background: var(--accent-soft);
}

.page-hero {
  padding: clamp(2.5rem, 6vw, 4rem) 0 2rem;
  background:
    linear-gradient(180deg, #f4f9f7 0%, #ffffff 100%);
}

.page-hero.compact {
  padding-bottom: 1rem;
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.breadcrumb a {
  text-decoration: none;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  margin-top: 2.5rem;
}

.prose ul,
.prose ol {
  color: var(--ink-soft);
  padding-left: 1.2rem;
}

.prose li {
  margin-bottom: 0.45rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 0.75rem;
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--bg-soft);
  color: var(--ink);
}

.tier {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tier.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  position: relative;
}

.tier-price {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ink);
  margin: 0;
}

.tier-price span {
  font-size: 0.95rem;
  color: var(--ink-soft);
  font-family: var(--font-sans);
}

.tier ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
  flex: 1;
}

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

.review-list {
  display: grid;
  gap: 1.25rem;
}

.review-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem;
}

.review-card.wide {
  grid-column: 1 / -1;
}

.stars {
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.case-study {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
  background: var(--bg-soft);
  border-radius: 18px;
  padding: 2rem;
}

.case-study img {
  border-radius: 12px;
  aspect-ratio: 4/3;
  object-fit: cover;
  width: 100%;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

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

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

.form-field label {
  font-weight: 560;
  font-size: 0.95rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem 0.95rem;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

.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: var(--warn);
  font-size: 0.88rem;
  display: none;
}

.form-field.invalid .field-error {
  display: block;
}

.form-field.invalid input,
.form-field.invalid select,
.form-field.invalid textarea {
  border-color: var(--warn);
}

.form-status {
  display: none;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  font-size: 0.95rem;
}

.form-status.success {
  display: block;
  background: #e7f6f1;
  color: var(--accent-deep);
}

.form-status.error {
  display: block;
  background: #f8ebe8;
  color: var(--warn);
}

.address-block {
  background: var(--bg-soft);
  border-radius: 16px;
  padding: 1.5rem;
}

.address-block p {
  margin-bottom: 0.65rem;
}

.modules {
  display: grid;
  gap: 0.75rem;
}

.module {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  background: #fff;
}

.module strong {
  display: block;
  margin-bottom: 0.25rem;
}

.instructor {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.25rem;
  align-items: center;
  background: var(--bg-soft);
  border-radius: 16px;
  padding: 1.25rem;
}

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

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 1rem 1.2rem;
  font-weight: 600;
  list-style: none;
}

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

.faq-item p {
  padding: 0 1.2rem 1.1rem;
  margin: 0;
}

.article-hero img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: 16px;
  margin: 1.5rem 0 2rem;
}

.site-footer {
  margin-top: 3rem;
  background: #12231f;
  color: #d7e4df;
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 2rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: #fff;
  margin: 0 0 0.5rem;
}

.footer-tagline,
.footer-contact p,
.footer-bottom p {
  color: #a7bbb5;
}

.footer-heading {
  color: #fff;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.footer-links {
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.footer-links a,
.footer-contact a {
  color: #c9ddd7;
  text-decoration: none;
}

.footer-links a:hover,
.footer-contact a:hover {
  color: #fff;
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cookie-banner {
  position: fixed;
  inset: auto 1rem 1rem 1rem;
  z-index: 60;
  max-width: 520px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 1.25rem;
  display: none;
}

.cookie-banner.visible {
  display: block;
  animation: rise-in 0.4s ease both;
}

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

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

.inline-error {
  background: #f8ebe8;
  color: var(--warn);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  margin: 0.75rem 0;
}

.not-found {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 1rem;
}

.not-found .code {
  font-family: var(--font-display);
  font-size: 5rem;
  color: var(--accent);
  margin: 0;
  line-height: 1;
}

.muted {
  color: var(--ink-soft);
}

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

.stat-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.stat-inline div strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--accent-deep);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (max-width: 960px) {
  .hero-grid,
  .feature-course,
  .quote-grid,
  .course-grid,
  .blog-grid,
  .tier-grid,
  .contact-layout,
  .case-study,
  .footer-grid,
  .split-2 {
    grid-template-columns: 1fr;
  }

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    gap: 0.35rem;
  }

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

  .site-nav a {
    padding: 0.7rem 0.4rem;
  }

  .nav-cta {
    text-align: center;
    margin-top: 0.35rem;
  }

  .cookie-banner {
    left: 0.75rem;
    right: 0.75rem;
    max-width: none;
  }
}