:root {
  --bg: #f7f9f8;
  --bg-elevated: #ffffff;
  --ink: #1c2a2a;
  --ink-soft: #4a5c5b;
  --line: #dce6e4;
  --accent: #2f6f6a;
  --accent-soft: #e4f1ef;
  --accent-deep: #1f4f4b;
  --warm: #c17a4a;
  --warm-soft: #f8efe7;
  --danger: #b33b3b;
  --ok: #2a7a52;
  --shadow: 0 18px 40px rgba(28, 42, 42, 0.06);
  --radius: 18px;
  --max: 1120px;
  --font-display: "Nanum Myeongjo", "Noto Serif KR", serif;
  --font-body: "Noto Sans KR", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(circle at 12% -10%, #e8f3f1 0%, transparent 42%),
    radial-gradient(circle at 90% 8%, #f5ebe3 0%, transparent 36%),
    linear-gradient(180deg, #fbfcfb 0%, var(--bg) 48%, #f3f7f6 100%);
  line-height: 1.7;
  min-height: 100vh;
}

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

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);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(247, 249, 248, 0.86);
  border-bottom: 1px solid rgba(220, 230, 228, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
}

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

.brand-mark {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 0.7rem;
  background: linear-gradient(145deg, var(--accent), #4a908a);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

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

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

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

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font: inherit;
  color: var(--ink);
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.85rem 1.35rem;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

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

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(47, 111, 106, 0.22);
}

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

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

.btn-ghost:hover {
  background: var(--bg-elevated);
  color: var(--ink);
}

.hero {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}

.hero-shell {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: end;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.4rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0 0 1rem;
  color: var(--ink);
  animation: rise 0.8s ease both;
}

.hero-lead {
  font-size: 1.12rem;
  max-width: 34rem;
  animation: rise 0.9s ease 0.08s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
  animation: rise 1s ease 0.14s both;
}

.hero-visual {
  position: relative;
  min-height: 420px;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
  animation: fade-scale 1.1s ease both;
}

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

.hero-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1.2rem 1.4rem;
  background: linear-gradient(transparent, rgba(20, 36, 35, 0.72));
  color: #f4f8f7;
  font-size: 0.92rem;
}

.section {
  padding: 4.2rem 0;
}

.section-tight {
  padding: 2.8rem 0;
}

.section-head {
  max-width: 38rem;
  margin-bottom: 2rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.55rem;
  font-weight: 700;
}

.proof-band {
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.8rem 0;
}

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--ink);
}

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

.course-grid,
.card-grid,
.blog-grid,
.tier-grid,
.review-grid {
  display: grid;
  gap: 1.25rem;
}

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

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

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

.review-grid {
  grid-template-columns: repeat(2, 1fr);
}

.media-card,
.plain-block,
.tier,
.review-card,
.faq-item,
.module,
.form-panel,
.legal,
.case-study {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.media-card {
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.media-card .body,
.tier,
.review-card,
.faq-item,
.module,
.form-panel,
.legal,
.case-study,
.plain-block {
  padding: 1.35rem 1.4rem 1.5rem;
}

.media-card h3,
.tier h3 {
  font-size: 1.25rem;
}

.meta {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-bottom: 0.55rem;
}

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

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

.benefit-list li {
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.7);
}

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

.quote-stack blockquote {
  margin: 0;
  padding: 1.4rem 1.5rem;
  background: var(--accent-soft);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 1.05rem;
}

.quote-stack cite {
  display: block;
  margin-top: 0.8rem;
  font-style: normal;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.cta-band {
  margin: 1rem 0 4rem;
  padding: 2.4rem;
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(47, 111, 106, 0.92), rgba(31, 79, 75, 0.95)),
    url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1600&q=80") center/cover;
  color: #f5fafa;
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
}

.cta-band p,
.cta-band h2 {
  color: #f5fafa;
}

.page-hero {
  padding: 3.4rem 0 2rem;
}

.page-hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: start;
}

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

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

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

.faq-list {
  display: grid;
  gap: 0.85rem;
}

.tier.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  background: linear-gradient(180deg, #fff, var(--accent-soft));
}

.tier .price {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ink);
  margin: 0.4rem 0 1rem;
}

.tier ul {
  margin: 0 0 1.2rem;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.stars {
  color: var(--warm);
  letter-spacing: 0.08em;
}

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

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  color: var(--ink);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem 0.95rem;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

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

.field-error,
.form-status,
.inline-error {
  font-size: 0.9rem;
  margin: 0;
}

.field-error,
.inline-error,
.form-status.error {
  color: var(--danger);
}

.form-status.success {
  color: var(--ok);
}

.contact-aside {
  background: var(--warm-soft);
  border: 1px solid #eddccb;
  border-radius: var(--radius);
  padding: 1.4rem;
}

.contact-aside h2 {
  font-size: 1.3rem;
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: #eff5f4;
  padding: 2.8rem 0 1.8rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.8rem;
}

.footer-grid h3 {
  font-size: 1rem;
  margin-bottom: 0.7rem;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.footer-grid a {
  text-decoration: none;
  color: var(--ink-soft);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  max-width: 720px;
  margin-inline: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1.15rem 1.25rem;
  display: none;
}

.cookie-banner.show {
  display: block;
  animation: rise 0.45s ease both;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

.legal h2 {
  margin-top: 1.6rem;
  font-size: 1.25rem;
}

.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.4rem;
  font-size: 0.92rem;
}

.legal th,
.legal td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.legal th {
  background: var(--accent-soft);
}

.article {
  max-width: 720px;
}

.article-hero {
  border-radius: 24px;
  overflow: hidden;
  margin: 1.2rem 0 1.8rem;
}

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

.breadcrumb {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.breadcrumb a {
  text-decoration: none;
}

.not-found {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 0;
}

.not-found h1 {
  font-size: clamp(3rem, 8vw, 5rem);
}

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

@keyframes fade-scale {
  from {
    opacity: 0;
    transform: scale(1.03);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@media (max-width: 960px) {
  .hero-shell,
  .benefit-list,
  .split,
  .footer-grid,
  .course-grid,
  .blog-grid,
  .card-grid,
  .tier-grid,
  .review-grid,
  .proof-grid {
    grid-template-columns: 1fr;
  }

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

  .nav {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 1.25rem;
    left: 1.25rem;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 0.8rem;
    display: none;
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }

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