:root {
  --bg: #ffffff;
  --bg-soft: #f5f9f8;
  --bg-muted: #eef4f2;
  --ink: #1b2a28;
  --ink-soft: #4a5c59;
  --line: #d7e3df;
  --accent: #1f6f68;
  --accent-deep: #14524d;
  --accent-soft: #a8d5ce;
  --accent-wash: #e7f4f1;
  --warn: #9a4a2e;
  --ok: #1f6f68;
  --shadow: 0 18px 50px rgba(21, 52, 48, 0.08);
  --radius: 14px;
  --radius-sm: 8px;
  --max: 1120px;
  --font-sans: "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  --font-display: "Shippori Mincho", "Noto Serif KR", serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::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: 1.02rem;
  -webkit-font-smoothing: antialiased;
}

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: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
}

.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(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  border-radius: var(--radius-sm);
}

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

.wrap {
  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(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(21, 52, 48, 0.04);
}

.header-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 0.4rem;
  background:
    linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.25);
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 28% 18% auto;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  box-shadow: 0 5px 0 #fff, 0 10px 0 rgba(255, 255, 255, 0.55);
}

.brand-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  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;
  transition: color 0.2s ease;
}

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

.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: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  place-items: center;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  position: relative;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bar::before { top: -6px; }
.nav-toggle-bar::after { top: 6px; }

.site-footer {
  margin-top: 5rem;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 2rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.footer-tag,
.footer-contact p {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-heading {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 0.85rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

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

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

.footer-bottom {
  width: min(100% - 2.5rem, var(--max));
  margin: 2.5rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.9rem;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.25s var(--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);
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.85rem;
}

.section {
  padding: 4.5rem 0;
}

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

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

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

.section-head h2 {
  font-size: clamp(1.7rem, 2.4vw, 2.35rem);
}

.lead {
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: min(88vh, 760px);
  display: grid;
  align-items: end;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, rgba(21, 42, 40, 0.55) 100%),
    url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1800&q=80") center/cover no-repeat;
  color: #fff;
}

.hero-inner {
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: 7rem 0 4.5rem;
  max-width: 42rem;
}

.hero h1 {
  font-size: clamp(2.3rem, 5vw, 3.8rem);
  margin-bottom: 1rem;
  color: #fff;
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.12rem;
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

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

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

.hero .btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.hero .btn-ghost:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: -2.2rem;
  position: relative;
  z-index: 2;
}

.proof-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow);
}

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.55rem;
  color: var(--accent-deep);
  margin-bottom: 0.2rem;
}

.proof-item span {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.course-grid,
.card-grid,
.blog-grid,
.price-grid {
  display: grid;
  gap: 1.35rem;
}

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

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

.price-grid {
  grid-template-columns: repeat(2, 1fr);
  align-items: stretch;
}

.media-card,
.feature-block,
.price-card,
.review-card,
.blog-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

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

.media-card .body,
.blog-card .body,
.price-card,
.review-card,
.feature-block {
  padding: 1.35rem 1.4rem 1.5rem;
}

.media-card h3,
.blog-card h3,
.price-card h3,
.feature-block h3 {
  font-size: 1.2rem;
  margin-bottom: 0.45rem;
}

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

.feature-block {
  background: var(--bg);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.feature-icon {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.7rem;
  background: var(--accent-wash);
  color: var(--accent-deep);
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

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

.quote-list {
  display: grid;
  gap: 1.2rem;
}

.review-card blockquote {
  margin: 0 0 1rem;
  font-size: 1.02rem;
}

.review-card .attr {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.stars {
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
  font-size: 0.9rem;
}

.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;
  margin: 0.6rem 0 0.2rem;
}

.price-card ul {
  margin: 1.2rem 0 1.5rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.price-card li {
  padding-left: 1.2rem;
  position: relative;
  color: var(--ink-soft);
}

.price-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent-soft);
}

.page-hero {
  padding: 3.5rem 0 2rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  max-width: 18ch;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  color: var(--ink-soft);
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.breadcrumbs a {
  text-decoration: none;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.45rem;
}

.prose h3 {
  margin-top: 1.5rem;
  font-size: 1.15rem;
}

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

.prose li + li {
  margin-top: 0.35rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

th, td {
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: var(--bg-soft);
  font-weight: 600;
}

tr:last-child td {
  border-bottom: 0;
}

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

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

label {
  font-weight: 600;
  font-size: 0.92rem;
}

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

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.field-error {
  color: var(--warn);
  font-size: 0.86rem;
  min-height: 1.2em;
}

.form-status {
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  display: none;
}

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

.form-status.is-error {
  display: block;
  background: #f8ebe6;
  color: var(--warn);
}

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

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq details p {
  color: var(--ink-soft);
  margin: 0.7rem 0 0.2rem;
}

.modules {
  display: grid;
  gap: 0.9rem;
}

.module {
  border-left: 3px solid var(--accent-soft);
  padding: 0.4rem 0 0.4rem 1rem;
}

.module h3 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.module p {
  color: var(--ink-soft);
  margin: 0;
}

.instructor {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.2rem;
  align-items: center;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

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

.cta-band {
  background:
    linear-gradient(135deg, var(--accent-deep), var(--accent));
  color: #fff;
  border-radius: calc(var(--radius) + 4px);
  padding: 2.5rem;
  display: grid;
  gap: 1rem;
  align-items: center;
  grid-template-columns: 1.4fr auto;
}

.cta-band h2 {
  color: #fff;
  margin: 0 0 0.4rem;
}

.cta-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
}

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

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  max-width: 34rem;
  margin-left: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.2rem 1.3rem;
  display: none;
}

.cookie-banner.is-visible {
  display: block;
  animation: rise 0.45s var(--ease);
}

.cookie-banner p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

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

.inline-error {
  margin: 1rem auto;
  width: min(100% - 2.5rem, var(--max));
  background: #f8ebe6;
  color: var(--warn);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
}

.not-found {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 1.25rem;
}

.not-found h1 {
  font-size: clamp(3rem, 8vw, 5rem);
  margin-bottom: 0.3rem;
}

.case-study {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-soft);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.timeline {
  display: grid;
  gap: 1.2rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
}

.timeline-item strong {
  color: var(--accent);
  font-size: 0.9rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 960px) {
  .proof-strip,
  .course-grid,
  .card-grid,
  .blog-grid,
  .price-grid,
  .footer-grid,
  .split,
  .cta-band {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 760px) {
  .nav-toggle {
    display: grid;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1.25rem 1.1rem;
    display: none;
  }

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

  .site-nav a {
    padding: 0.65rem 0.2rem;
  }

  .nav-cta {
    text-align: center;
    margin-top: 0.3rem;
  }

  .proof-strip,
  .course-grid,
  .card-grid,
  .blog-grid,
  .price-grid,
  .footer-grid,
  .split,
  .cta-band,
  .instructor,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding-top: 5.5rem;
  }
}