:root {
  --bg: #f7f8f6;
  --bg-elevated: #ffffff;
  --surface: #eef1ee;
  --ink: #1c2420;
  --ink-soft: #4a554e;
  --muted: #6b756f;
  --line: #d8ddd8;
  --accent: #2f4a3e;
  --accent-hover: #243a30;
  --accent-soft: #a8c4b4;
  --accent-wash: #e4ebe6;
  --focus: #3d6b55;
  --danger: #9b3b2e;
  --success: #2d6a4f;
  --radius: 10px;
  --shadow: 0 12px 40px rgba(28, 36, 32, 0.06);
  --font-display: "Nanum Myeongjo", "Noto Serif KR", serif;
  --font-body: "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-weight: 400;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #e8efe9 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #eef2f0 0%, transparent 50%),
    var(--bg);
  line-height: 1.7;
  min-height: 100vh;
}

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

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2rem, 4.5vw, 3.15rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.55rem, 3vw, 2.15rem); }
h3 { font-size: 1.25rem; }

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: 100;
  background: rgba(247, 248, 246, 0.88);
  backdrop-filter: blur(12px);
  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 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  text-decoration: none !important;
}

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

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
  cursor: pointer;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, background 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-hover);
  color: #fff;
}

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

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

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.section {
  padding: 4.5rem 0;
}

.section-tight {
  padding: 3rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.lead {
  font-size: 1.1rem;
  max-width: 38rem;
}

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

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(28, 36, 32, 0.15) 0%,
    rgba(28, 36, 32, 0.55) 45%,
    rgba(28, 36, 32, 0.82) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 5rem 0 4rem;
  color: #f5f7f5;
  animation: rise 0.9s ease both;
}

.hero-content h1 {
  color: #fff;
  max-width: 14ch;
}

.hero-content p {
  color: rgba(245, 247, 245, 0.88);
  max-width: 34rem;
  font-size: 1.08rem;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
  color: #fff;
}

.page-hero {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--accent-wash), transparent);
}

.page-hero h1 {
  max-width: 18ch;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
}

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

.grid-2-auto {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.benefit {
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.benefit h3 {
  margin-bottom: 0.4rem;
}

.course-tile {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s ease;
}

.course-tile:hover {
  transform: translateY(-4px);
}

.course-tile img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.course-tile h3 {
  color: var(--ink);
  margin-bottom: 0.35rem;
}

.course-tile p {
  font-size: 0.95rem;
  margin: 0;
}

.meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.proof-band {
  background: var(--accent);
  color: #fff;
  padding: 3rem 0;
}

.proof-band .grid-3 {
  text-align: center;
}

.proof-num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  display: block;
  margin-bottom: 0.25rem;
}

.proof-band p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
  font-size: 0.95rem;
}

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

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

.quote footer {
  margin-top: 0.85rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  align-items: stretch;
}

.price-plan {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.price-plan:hover {
  border-color: var(--accent-soft);
  box-shadow: var(--shadow);
}

.price-plan.featured {
  border-color: var(--accent);
  background: var(--accent-wash);
}

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

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

.price small {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 400;
}

.price-plan ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  flex: 1;
}

.price-plan li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.form {
  display: grid;
  gap: 1rem;
  max-width: 36rem;
}

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

.form label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
}

.form input,
.form select,
.form textarea {
  width: 100%;
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--bg-elevated);
  color: var(--ink);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(61, 107, 85, 0.18);
}

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

.field-error {
  color: var(--danger);
  font-size: 0.85rem;
  display: none;
}

.field-error.visible {
  display: block;
}

.form-status {
  padding: 0.85rem 1rem;
  border-radius: 8px;
  font-size: 0.92rem;
  display: none;
}

.form-status.success {
  display: block;
  background: #e6f2eb;
  color: var(--success);
}

.form-status.error {
  display: block;
  background: #f8eae7;
  color: var(--danger);
}

.inline-error {
  background: #f8eae7;
  color: var(--danger);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.contact-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.contact-panel h3 {
  margin-bottom: 1rem;
}

.contact-panel p {
  margin-bottom: 0.65rem;
  font-size: 0.95rem;
}

.blog-list {
  display: grid;
  gap: 2rem;
}

.blog-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
  text-decoration: none;
  color: inherit;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
  transition: opacity 0.2s ease;
}

.blog-item:hover {
  opacity: 0.85;
}

.blog-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.article {
  max-width: 720px;
  margin: 0 auto;
}

.article img.cover {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  margin: 1.5rem 0 2rem;
}

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

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

.faq details:last-child {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--ink);
  list-style: none;
}

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

.faq summary::after {
  content: "+";
  float: right;
  color: var(--muted);
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin-top: 0.75rem;
}

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

.modules li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
}

.modules .num {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--accent);
}

.instructor {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.25rem;
  align-items: center;
  padding: 1.5rem;
  background: var(--surface);
  border-radius: var(--radius);
}

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

.legal {
  max-width: 760px;
}

.legal h2 {
  margin-top: 2.25rem;
  font-size: 1.35rem;
}

.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.9rem;
}

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

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

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  padding: 3rem 0 2rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 0.75rem;
}

.footer-col h4 {
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

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

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.25rem;
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
}

.cookie-banner {
  position: fixed;
  bottom: 1.25rem;
  left: 1.25rem;
  right: 1.25rem;
  z-index: 200;
  max-width: 480px;
  margin-right: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  animation: slide-up 0.45s ease both;
}

.cookie-banner p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cookie-actions .btn {
  padding: 0.6rem 1rem;
  font-size: 0.88rem;
}

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

.not-found .code {
  font-family: var(--font-display);
  font-size: 5rem;
  color: var(--accent-soft);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.split-visual img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
}

.journey {
  counter-reset: step;
}

.journey-item {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

.journey-item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--accent);
}

.review-mix {
  display: grid;
  gap: 1.5rem;
}

.review-block {
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.stars {
  color: var(--accent);
  letter-spacing: 0.1em;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.case-study {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2rem 0;
}

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

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

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .grid-3,
  .pricing-grid,
  .footer-grid,
  .grid-2,
  .grid-2-auto {
    grid-template-columns: 1fr;
  }

  .blog-item {
    grid-template-columns: 1fr;
  }

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

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

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.65rem 0.25rem;
  }

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

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

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

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