:root {
  --bg: #ffffff;
  --bg-soft: #f4f7f6;
  --bg-mist: #e8efec;
  --ink: #1e3a4c;
  --ink-soft: #3d5563;
  --muted: #6b7f88;
  --line: #d5e0dc;
  --accent: #3d8b7a;
  --accent-deep: #2a6b5d;
  --accent-soft: #7eb8a8;
  --accent-wash: #e8f4f0;
  --warn: #9a4d3c;
  --radius: 4px;
  --radius-lg: 12px;
  --shadow: 0 18px 40px rgba(30, 58, 76, 0.08);
  --font-display: "Fraunces", "Noto Serif KR", serif;
  --font-body: "Sora", "Noto Sans KR", sans-serif;
  --space: clamp(1rem, 2.5vw, 2rem);
  --max: 1120px;
  --header-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  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: 550;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 0.75rem;
}

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;
}

.container {
  width: min(100% - 2 * var(--space), 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 var(--line);
}

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

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

.brand-mark {
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 6px;
  background:
    linear-gradient(145deg, var(--accent-soft), var(--accent-deep));
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

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

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

.nav-cta {
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--ink);
  color: #fff !important;
}

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

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: var(--radius);
  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: -5px;
  left: 0;
}

.nav-toggle-bar::after {
  position: absolute;
  top: 5px;
  left: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, 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);
}

.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

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

.section-kicker {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.55rem);
  max-width: 18ch;
}

.section-lead {
  max-width: 42rem;
  font-size: 1.05rem;
}

.hero {
  position: relative;
  min-height: min(88vh, 760px);
  display: grid;
  align-items: end;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(30, 58, 76, 0.15), rgba(30, 58, 76, 0.72)),
    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 * var(--space), var(--max));
  margin: 0 auto;
  padding: clamp(4rem, 12vh, 7rem) 0 clamp(3rem, 8vh, 5rem);
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin: 0 0 1.25rem;
  color: #fff;
  animation: rise 0.9s ease both;
}

.hero-line {
  max-width: 28rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.75rem;
  animation: rise 0.9s ease 0.12s both;
}

.hero-actions {
  animation: rise 0.9s ease 0.22s both;
}

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

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

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

.proof-bar {
  border-bottom: 1px solid var(--line);
  padding: 1.75rem 0;
  background: var(--bg);
}

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

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.85rem;
  color: var(--ink);
  font-weight: 600;
}

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

.feature-course {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

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

.benefit-list {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.benefit-row {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.benefit-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--accent);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.course-card,
.blog-card,
.price-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.course-card:hover,
.blog-card:hover,
.price-card:hover {
  border-color: var(--accent-soft);
  box-shadow: var(--shadow);
}

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

.card-body {
  padding: 1.25rem 1.35rem 1.5rem;
}

.card-body h3 {
  font-size: 1.2rem;
}

.card-meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.testimonial-stack {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

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

.quote p {
  font-size: 1.08rem;
  color: var(--ink);
}

.quote footer {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.cta-band {
  background:
    linear-gradient(120deg, var(--ink), #2f5a52);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 3rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

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

.cta-band p {
  opacity: 0.88;
  margin-top: 0.5rem;
  max-width: 36rem;
}

.page-hero {
  padding: clamp(3rem, 8vw, 5rem) 0 2rem;
  background:
    linear-gradient(180deg, var(--accent-wash), var(--bg));
}

.page-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  max-width: 16ch;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.module-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0.85rem;
}

.module-list li {
  padding: 1rem 1.15rem;
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.price-card {
  padding: 1.75rem;
}

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

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

.price-card ul {
  padding-left: 1.1rem;
  color: var(--ink-soft);
  margin: 1rem 0 1.5rem;
}

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

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

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

.form input,
.form select,
.form textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: inherit;
  background: #fff;
  color: var(--ink);
}

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

.field-error {
  color: var(--warn);
  font-size: 0.85rem;
  min-height: 1.1em;
}

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

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

.form-status.is-error {
  display: block;
  background: #f8ebe8;
  color: var(--warn);
}

.inline-error {
  margin: 0.75rem 0;
  padding: 0.75rem 1rem;
  background: #f8ebe8;
  color: var(--warn);
  border-radius: var(--radius);
  display: none;
}

.inline-error.is-visible {
  display: block;
}

.contact-panel {
  background: var(--bg-soft);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
}

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

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

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: var(--bg-soft);
  color: var(--ink);
}

.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  padding: 3.5rem 0 1.75rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 2rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: #fff;
  margin: 0 0 0.5rem;
}

.footer-tag,
.footer-address {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
}

.footer-heading {
  color: #fff;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  margin-bottom: 0.45rem;
  font-size: 0.92rem;
}

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

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
}

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

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  max-width: 520px;
  margin-inline: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.35rem;
  display: none;
}

.cookie-banner.is-visible {
  display: block;
  animation: rise 0.35s ease both;
}

.cookie-banner p {
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

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

.article {
  max-width: 42rem;
  margin: 0 auto;
}

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

.avatar {
  width: 5.5rem;
  height: 5.5rem;
  border-radius: 50%;
  object-fit: cover;
}

.rating {
  color: var(--accent-deep);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.case-study {
  background: var(--bg-soft);
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  margin-top: 1.5rem;
}

.timeline {
  display: grid;
  gap: 0;
  margin-top: 2rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

.timeline-phase {
  font-family: var(--font-display);
  color: var(--accent);
  font-weight: 600;
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 1rem;
}

.error-page h1 {
  font-size: clamp(3rem, 10vw, 6rem);
  margin-bottom: 0.5rem;
}

@media (max-width: 900px) {
  .proof-grid,
  .card-grid,
  .price-grid,
  .feature-course,
  .split,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .nav-cta {
    text-align: center;
  }

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