:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1c2422;
  --muted: #5b6764;
  --line: #e4e8e5;
  --accent: #1f6f6b;
  --accent-soft: #d9efeb;
  --accent-deep: #145552;
  --sand: #f0ebe3;
  --warn: #9a3b2f;
  --ok: #1f6b45;
  --shadow: 0 18px 50px rgba(28, 36, 34, 0.06);
  --radius: 18px;
  --font-display: "Fraunces", "Noto Serif KR", Georgia, serif;
  --font-body: "Noto Sans KR", "Segoe UI", sans-serif;
  --space: clamp(1.25rem, 2vw, 2rem);
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(31, 111, 107, 0.08), transparent 60%),
    radial-gradient(900px 420px at 100% 0%, rgba(240, 235, 227, 0.9), transparent 55%),
    var(--bg);
  line-height: 1.7;
  min-height: 100vh;
}

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

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.25;
  font-weight: 560;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

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

.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(--ink);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  border-radius: 999px;
}

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

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(251, 250, 247, 0.86);
  border-bottom: 1px solid rgba(228, 232, 229, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

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

.logo-mark {
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 0.45rem;
  background:
    linear-gradient(145deg, var(--accent) 0%, #3d9a94 55%, var(--accent-soft) 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.03em;
}

.site-nav .nav-list {
  list-style: none;
  display: flex;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
}

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

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

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--surface);
  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(--ink);
  margin: 0 auto;
  position: relative;
}

.nav-toggle-bar::before {
  position: absolute;
  top: -6px;
  left: 0;
}

.nav-toggle-bar::after {
  position: absolute;
  top: 6px;
  left: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.8rem 1.35rem;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-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-deep);
}

.hero {
  padding: clamp(3rem, 8vw, 6.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  margin: 0 0 1.25rem;
  color: var(--ink);
  animation: rise 0.9s ease both;
}

.hero-lead {
  max-width: 34rem;
  font-size: 1.12rem;
  margin-bottom: 1.75rem;
  animation: rise 0.9s ease 0.12s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.9s ease 0.22s both;
}

.hero-stage {
  margin-top: clamp(2rem, 5vw, 3.5rem);
  border-radius: calc(var(--radius) + 6px);
  overflow: hidden;
  box-shadow: var(--shadow);
  animation: fade-scale 1s ease 0.2s both;
}

.hero-stage img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.section {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(240, 235, 227, 0.45));
}

.section-kicker {
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  font-weight: 600;
}

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

.section-head h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding: 1.5rem 0 0;
}

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--ink);
  letter-spacing: -0.03em;
}

.proof-item span {
  color: var(--muted);
  font-size: 0.95rem;
}

.course-grid,
.card-grid,
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.course-card,
.soft-panel,
.blog-card,
.price-card,
.review-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.course-card img,
.blog-card img,
.page-hero img,
.instructor-avatar {
  width: 100%;
  object-fit: cover;
}

.course-card img {
  aspect-ratio: 16 / 10;
}

.course-card .body,
.blog-card .body,
.price-card,
.review-card,
.soft-panel {
  padding: 1.25rem 1.3rem 1.4rem;
}

.course-card h3,
.blog-card h3,
.price-card h3 {
  font-size: 1.2rem;
}

.meta {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 0.6rem;
}

.benefit-list {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

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

.benefit-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

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

.benefit-list h3 {
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
}

.benefit-visual {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.benefit-visual img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  width: 100%;
}

.quote-stack {
  display: grid;
  gap: 1rem;
}

.quote {
  padding: 1.4rem 1.5rem;
  background: var(--surface);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

.quote footer {
  color: var(--muted);
  font-size: 0.9rem;
}

.cta-band {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent));
  color: #fff;
  border-radius: calc(var(--radius) + 4px);
  padding: clamp(2rem, 5vw, 3rem);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: center;
}

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

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

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

.page-hero {
  padding: clamp(2.5rem, 6vw, 4rem) 0 1rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  max-width: 18ch;
}

.page-hero .lead {
  max-width: 40rem;
  font-size: 1.08rem;
}

.page-hero-media {
  margin-top: 2rem;
  border-radius: var(--radius);
  overflow: hidden;
}

.page-hero-media img {
  width: 100%;
  aspect-ratio: 18 / 8;
  object-fit: cover;
}

.prose {
  max-width: 46rem;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.55rem;
}

.prose h3 {
  margin-top: 1.5rem;
  font-size: 1.2rem;
}

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

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0 1.75rem;
  font-size: 0.95rem;
}

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

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

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
  align-items: stretch;
}

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

.price-card .amount {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ink);
  margin: 0.6rem 0 1rem;
}

.price-card ul {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  color: var(--muted);
}

.price-card li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
}

.review-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
}

.review-card .rating {
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.case-study {
  margin-top: 2rem;
  padding: 1.6rem;
  background: var(--sand);
  border-radius: var(--radius);
}

.modules {
  display: grid;
  gap: 0.85rem;
}

.module {
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
}

.faq p {
  margin: 0.7rem 0 0.2rem;
}

.instructor {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.instructor-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
  color: var(--ink);
}

.field input,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
  font: inherit;
  background: var(--surface);
  color: var(--ink);
}

.field textarea {
  min-height: 150px;
  resize: vertical;
}

.field-error {
  color: var(--warn);
  font-size: 0.88rem;
  min-height: 1.2em;
  margin-top: 0.3rem;
}

.form-status {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
}

.form-status.is-success {
  background: #e8f6ee;
  color: var(--ok);
}

.form-status.is-error {
  background: #f8e9e7;
  color: var(--warn);
}

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  background: #f5f2ec;
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.3fr;
  gap: 1.5rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.footer-heading {
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.7rem;
}

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

.footer-links a,
.footer-contact a {
  text-decoration: none;
  color: var(--muted);
}

.footer-links li {
  margin-bottom: 0.4rem;
}

.footer-contact p {
  font-size: 0.92rem;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 80;
  max-width: 720px;
  margin-inline: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  animation: rise 0.45s ease both;
}

.cookie-banner-inner {
  padding: 1.1rem 1.2rem;
  display: grid;
  gap: 0.9rem;
}

.cookie-banner p {
  margin: 0;
  color: var(--ink);
  font-size: 0.95rem;
}

.cookie-banner-actions {
  display: flex;
  gap: 0.6rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.inline-error {
  background: #f8e9e7;
  color: var(--warn);
  padding: 0.75rem 1rem;
  text-align: center;
}

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

.not-found h1 {
  font-size: clamp(3rem, 10vw, 6rem);
  margin-bottom: 0.4rem;
}

.split-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

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

@keyframes fade-scale {
  from {
    opacity: 0;
    transform: scale(0.985);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@media (max-width: 920px) {
  .course-grid,
  .blog-grid,
  .price-grid,
  .proof-strip,
  .footer-grid,
  .benefit-list,
  .contact-layout,
  .review-grid,
  .split-two {
    grid-template-columns: 1fr;
  }

  .price-card.featured {
    transform: none;
  }

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

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(251, 250, 247, 0.98);
    border-bottom: 1px solid var(--line);
    display: none;
  }

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

  .site-nav .nav-list {
    flex-direction: column;
    padding: 0.75rem 1rem 1.1rem;
    gap: 0.35rem;
  }

  .site-nav a {
    display: block;
    padding: 0.55rem 0.2rem;
  }
}