:root {
  --bg: #f3f4f1;
  --bg-elevated: #fafaf8;
  --ink: #1c221f;
  --ink-soft: #4a534c;
  --line: #d5d9d2;
  --accent: #5d7260;
  --accent-deep: #3f5143;
  --accent-soft: #e4ebe3;
  --sand: #c8bfb2;
  --danger: #8b3a3a;
  --success: #2f5d45;
  --shadow: 0 18px 40px rgba(28, 34, 31, 0.08);
  --radius: 4px;
  --font-display: "Noto Serif KR", "Source Serif 4", Georgia, serif;
  --font-body: "IBM Plex Sans KR", "Noto Sans KR", sans-serif;
  --max: 1120px;
  --header-h: 72px;
}

*,
*::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(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(93, 114, 96, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(200, 191, 178, 0.28), transparent 50%),
    linear-gradient(180deg, #eef0ec 0%, var(--bg) 28%, #f7f7f5 100%);
  min-height: 100vh;
}

body.nav-open {
  overflow: hidden;
}

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);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
}

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

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

.inline-error {
  background: #f6e8e8;
  color: var(--danger);
  padding: 0.75rem 1rem;
  text-align: center;
  font-size: 0.95rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(243, 244, 241, 0.86);
  border-bottom: 1px solid rgba(213, 217, 210, 0.7);
  animation: headerIn 0.6s ease both;
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

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

.brand-mark {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 3px;
  background: linear-gradient(145deg, var(--accent) 0%, var(--accent-deep) 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  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;
  transition: color 0.2s ease;
}

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

.nav-cta {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  color: var(--ink) !important;
}

.nav-cta:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--ink);
}

.site-footer {
  margin-top: 5rem;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.35), rgba(228, 235, 227, 0.55));
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 1.25rem 2rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  color: var(--ink);
}

.footer-tag {
  margin: 0;
  max-width: 22rem;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 2.5rem;
}

.footer-col h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 0.9rem;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 600;
}

.footer-col a {
  display: block;
  text-decoration: none;
  color: var(--ink-soft);
  margin-bottom: 0.45rem;
  font-size: 0.95rem;
}

.footer-col a:hover {
  color: var(--accent-deep);
}

.footer-contact p {
  font-size: 0.92rem;
  margin-bottom: 0.55rem;
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  animation: riseIn 0.45s ease both;
}

.cookie-banner-inner {
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 8px;
  padding: 1.1rem 1.2rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.cookie-banner-inner p {
  margin: 0;
  flex: 1 1 280px;
  font-size: 0.92rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

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

.btn-primary {
  background: var(--accent-deep);
  color: #f7f8f5;
}

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

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

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 0;
}

.hero-home {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero-home::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(20, 28, 24, 0.15) 0%, rgba(20, 28, 24, 0.55) 55%, rgba(20, 28, 24, 0.78) 100%),
    url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1800&q=80") center/cover no-repeat;
  z-index: -1;
  animation: heroZoom 12s ease-out both;
}

.hero-home-content {
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
  padding: 4rem 1.25rem 3.5rem;
  color: #f4f5f2;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  margin: 0 0 0.6rem;
  letter-spacing: -0.04em;
  color: #f7f8f5;
  animation: fadeUp 0.8s ease both;
}

.hero-home h1 {
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 500;
  margin: 0 0 0.85rem;
  max-width: 18ch;
  color: #eef1ec;
  animation: fadeUp 0.8s ease 0.12s both;
}

.hero-home .hero-lead {
  max-width: 34rem;
  color: rgba(244, 245, 242, 0.88);
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s ease 0.22s both;
}

.hero-home .btn-primary {
  animation: fadeUp 0.8s ease 0.32s both;
}

.section {
  padding: 4.5rem 0 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  margin: 0 0 0.7rem;
}

.section-head p {
  margin: 0;
}

.proof-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 2.5rem 0 0;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2.5rem;
}

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ink);
  letter-spacing: -0.03em;
}

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

.course-grid,
.blog-grid,
.tier-grid,
.review-grid {
  display: grid;
  gap: 1.75rem;
}

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

.blog-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-tile {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s ease;
}

.media-tile:hover {
  opacity: 0.92;
}

.media-tile img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 2px;
  margin-bottom: 1rem;
  filter: saturate(0.92) contrast(1.02);
}

.media-tile h3 {
  margin: 0 0 0.45rem;
  font-size: 1.2rem;
  color: var(--ink);
}

.media-tile p {
  margin: 0;
  font-size: 0.98rem;
}

.benefit-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 3rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.benefit-list li h3 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.benefit-list li p {
  margin: 0;
}

.quote-block {
  border-left: 3px solid var(--accent);
  padding: 0.2rem 0 0.2rem 1.25rem;
  margin: 0 0 1.75rem;
}

.quote-block p {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--ink);
  margin-bottom: 0.6rem;
}

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

.page-hero {
  padding: 3rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.5rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 0.75rem;
}

.page-hero p {
  max-width: 40rem;
  margin: 0;
  font-size: 1.08rem;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  margin: 2.2rem 0 0.8rem;
  font-size: 1.45rem;
}

.prose h3 {
  margin: 1.6rem 0 0.55rem;
  font-size: 1.15rem;
}

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

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

.tier {
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.tier h3 {
  margin: 0 0 0.4rem;
  font-size: 1.35rem;
}

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

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

.tier.featured {
  background: var(--accent-soft);
  padding: 1.75rem 1.25rem;
  border: 1px solid #c5d0c3;
  border-radius: 6px;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
}

.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 500;
  color: var(--ink);
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  font: inherit;
  color: var(--ink);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: 2px solid rgba(93, 114, 96, 0.35);
  border-color: var(--accent);
}

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

.form-status {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.form-status.is-success {
  background: #e5f0e8;
  color: var(--success);
}

.form-status.is-error {
  background: #f6e8e8;
  color: var(--danger);
}

.contact-aside {
  padding: 1.5rem 0;
}

.contact-aside h2 {
  font-size: 1.15rem;
  margin: 0 0 0.8rem;
}

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

.faq summary {
  cursor: pointer;
  font-weight: 560;
  color: var(--ink);
}

.faq details p {
  margin: 0.75rem 0 0;
}

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

.module-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.module-list strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--ink);
}

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

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

.case-study {
  margin: 2.5rem 0;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

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

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

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

th {
  background: var(--accent-soft);
  color: var(--ink);
  font-weight: 600;
}

.not-found {
  min-height: 60vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 3rem 1.25rem;
}

.not-found h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin: 0 0 0.6rem;
}

.instructor {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.25rem;
  align-items: start;
  margin: 2rem 0;
}

.instructor img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
}

.cta-band {
  margin-top: 4.5rem;
  padding: 2.75rem 1.5rem;
  background:
    linear-gradient(135deg, rgba(93, 114, 96, 0.14), rgba(200, 191, 178, 0.22)),
    var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 0.6rem;
}

.cta-band p {
  max-width: 32rem;
  margin: 0 auto 1.25rem;
}

.split-feature {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
  margin-top: 3rem;
}

.split-feature img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes headerIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes heroZoom {
  from {
    transform: scale(1.06);
  }
  to {
    transform: scale(1);
  }
}

@media (max-width: 900px) {
  .course-grid,
  .blog-grid,
  .tier-grid,
  .proof-row,
  .footer-cols,
  .contact-layout,
  .split-feature,
  .benefit-list {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(250, 250, 248, 0.98);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    gap: 0.35rem;
    display: none;
  }

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

  .site-nav a {
    padding: 0.7rem 0.2rem;
  }

  .course-grid,
  .blog-grid,
  .tier-grid,
  .proof-row,
  .footer-cols,
  .contact-layout,
  .split-feature,
  .benefit-list,
  .instructor {
    grid-template-columns: 1fr;
  }

  .cookie-banner-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .cookie-banner-actions {
    justify-content: stretch;
  }

  .cookie-banner-actions .btn {
    flex: 1;
  }

  .hero-home {
    min-height: 78vh;
  }
}