:root {
  --bg: #f6f5f2;
  --bg-elevated: #ffffff;
  --ink: #1e2420;
  --ink-soft: #4a524c;
  --muted: #6f776f;
  --line: #ddd9d1;
  --accent: #2f3d36;
  --accent-hover: #24312b;
  --accent-soft: #e7ebe7;
  --sand: #ebe6dc;
  --focus: #2f3d36;
  --danger: #8b3a2f;
  --success: #2f5d45;
  --radius: 10px;
  --shadow: 0 18px 50px rgba(30, 36, 32, 0.07);
  --font-display: "Fraunces", "Noto Serif KR", Georgia, serif;
  --font-body: "Source Sans 3", "Noto Sans KR", sans-serif;
  --max: 1120px;
  --header-h: 72px;
  --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-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(168, 181, 173, 0.28), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(235, 230, 220, 0.9), transparent 50%),
    var(--bg);
  min-height: 100vh;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  border-radius: 6px;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(246, 245, 242, 0.82);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease);
}

.site-header.is-scrolled,
.site-header {
  border-bottom-color: rgba(221, 217, 209, 0.8);
}

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

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
}

.brand__mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.brand__tag {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  width: 44px;
  height: 44px;
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 46px;
  padding: 0.7rem 1.25rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn--primary {
  background: var(--accent);
  color: #f7f6f3;
}

.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(--ink-soft);
  background: rgba(255, 255, 255, 0.55);
}

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

.btn--light:hover {
  background: var(--accent-soft);
}

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

.hero__visual {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(246, 245, 242, 0.15) 0%, rgba(246, 245, 242, 0.92) 78%, var(--bg) 100%),
    linear-gradient(120deg, #2f3d36 0%, #4a5c52 38%, #8a958c 68%, #ebe6dc 100%);
}

.hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 85%);
  animation: gridDrift 28s linear infinite;
}

.hero__bars {
  position: absolute;
  right: 8%;
  bottom: 18%;
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 42%;
  opacity: 0.55;
}

.hero__bars span {
  width: 28px;
  border-radius: 6px 6px 0 0;
  background: rgba(255, 255, 255, 0.35);
  transform-origin: bottom;
  animation: barRise 1.4s var(--ease) both;
}

.hero__bars span:nth-child(1) { height: 38%; animation-delay: 0.1s; }
.hero__bars span:nth-child(2) { height: 62%; animation-delay: 0.22s; }
.hero__bars span:nth-child(3) { height: 48%; animation-delay: 0.34s; }
.hero__bars span:nth-child(4) { height: 84%; animation-delay: 0.46s; }
.hero__bars span:nth-child(5) { height: 70%; animation-delay: 0.58s; }
.hero__bars span:nth-child(6) { height: 95%; animation-delay: 0.7s; }

.hero__content {
  padding: 4.5rem 0 4rem;
  max-width: 38rem;
  animation: fadeUp 0.9s var(--ease) both;
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 4.6rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
  color: var(--ink);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.2vw, 2rem);
  font-weight: 500;
  line-height: 1.35;
  margin: 0 0 1rem;
  color: var(--ink);
}

.hero__lead {
  margin: 0 0 1.75rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 34rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

section {
  padding: 4.5rem 0;
}

.section-kicker {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.85rem;
}

.section-lead {
  margin: 0;
  color: var(--ink-soft);
  max-width: 38rem;
}

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

.method-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.method-list li {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

.method-list strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

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

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.course-item {
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
  transition: transform 0.35s var(--ease);
}

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

.course-item__meta {
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.course-item h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0;
  font-weight: 600;
}

.course-item p {
  margin: 0;
  color: var(--ink-soft);
  flex: 1;
}

.course-item__link {
  font-weight: 600;
  color: var(--accent);
  font-size: 0.92rem;
}

.band {
  background: var(--accent);
  color: #f3f2ee;
  border-radius: 0;
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 20%, rgba(255, 255, 255, 0.08), transparent 40%),
    linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.04));
  pointer-events: none;
}

.band .section-kicker,
.band .section-lead {
  color: rgba(243, 242, 238, 0.72);
}

.band .section-title {
  color: #fff;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat span {
  color: rgba(243, 242, 238, 0.7);
  font-size: 0.95rem;
}

.voices {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2rem;
  margin-top: 2.5rem;
}

.voice {
  padding: 0;
  border: none;
  background: none;
}

.voice p {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  line-height: 1.55;
  color: var(--ink);
}

.voice:first-child p {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
  font-weight: 500;
}

.voice footer {
  color: var(--muted);
  font-size: 0.9rem;
}

.voice cite {
  font-style: normal;
  color: var(--ink-soft);
}

.cta-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 3rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cta-strip h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 0.5rem;
}

.cta-strip p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 28rem;
}

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

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin: 0 0 0.85rem;
  letter-spacing: -0.02em;
}

.page-hero p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 40rem;
  font-size: 1.1rem;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  margin: 2.5rem 0 0.85rem;
}

.prose h3 {
  font-size: 1.1rem;
  margin: 1.75rem 0 0.6rem;
}

.prose p,
.prose li {
  color: var(--ink-soft);
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-details {
  display: grid;
  gap: 1.25rem;
}

.contact-details dt {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.25rem;
}

.contact-details dd {
  margin: 0;
  color: var(--ink);
}

.form {
  display: grid;
  gap: 1rem;
  background: var(--bg-elevated);
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form label {
  display: grid;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.form input,
.form select,
.form textarea {
  font: inherit;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.form input:focus-visible,
.form select:focus-visible,
.form textarea:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
  border-color: var(--accent);
}

.form-status {
  margin: 0;
  font-size: 0.92rem;
  min-height: 1.4em;
}

.form-status.is-success { color: var(--success); }
.form-status.is-error { color: var(--danger); }
.form-status.is-pending { color: var(--muted); }

.faq {
  display: grid;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

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

.faq-item button {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font: inherit;
  font-weight: 600;
  padding: 1.1rem 0;
  cursor: pointer;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item button span {
  color: var(--muted);
  font-weight: 400;
}

.faq-item [data-faq-panel] {
  padding: 0 0 1.1rem;
  color: var(--ink-soft);
}

.outcome-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 2rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.outcome-list li {
  padding-left: 1.1rem;
  position: relative;
  color: var(--ink-soft);
}

.outcome-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  margin: 2rem 0;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.meta-row div span {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.meta-row div strong {
  font-weight: 600;
}

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

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

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

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-footer {
  padding: 3.5rem 0 2rem;
  margin-top: 2rem;
  border-top: 1px solid var(--line);
}

.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;
  margin: 0 0 0.75rem;
}

.site-footer p,
.site-footer li {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

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

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

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 200;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  pointer-events: none;
}

.cookie-banner.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.cookie-banner__inner {
  width: min(100%, 720px);
  margin-inline: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.cookie-banner__text {
  margin: 0;
  flex: 1 1 280px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.cookie-banner__actions {
  display: flex;
  gap: 0.6rem;
  flex-shrink: 0;
}

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

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

.error-page {
  min-height: calc(100vh - var(--header-h) - 220px);
  display: grid;
  place-content: center;
  text-align: center;
  padding: 4rem 0;
}

.error-page strong {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  display: block;
  line-height: 1;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.lab-visual {
  aspect-ratio: 4 / 3;
  border-radius: 12px;
  background:
    linear-gradient(160deg, rgba(47, 61, 54, 0.92), rgba(74, 92, 82, 0.85)),
    repeating-linear-gradient(
      -18deg,
      transparent,
      transparent 12px,
      rgba(255, 255, 255, 0.04) 12px,
      rgba(255, 255, 255, 0.04) 13px
    );
  position: relative;
  overflow: hidden;
}

.lab-visual svg {
  position: absolute;
  inset: 12%;
  width: 76%;
  height: 76%;
}

.timeline {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.5rem;
}

.timeline li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  align-items: start;
}

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

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}

@keyframes barRise {
  from { transform: scaleY(0.2); opacity: 0; }
  to { transform: scaleY(1); opacity: 1; }
}

@keyframes gridDrift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 48px 48px, 48px 48px; }
}

@media (max-width: 900px) {
  .split,
  .contact-grid,
  .voices,
  .footer-grid,
  .course-grid,
  .outcome-list {
    grid-template-columns: 1fr;
  }

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

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

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(246, 245, 242, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.5rem;
    gap: 0.25rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
  }

  .nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    padding: 0.85rem 0.25rem;
    border-bottom: 1px solid var(--line);
  }

  .hero__bars {
    right: 4%;
    height: 28%;
    opacity: 0.35;
  }

  .brand__tag {
    display: none;
  }
}

@media (max-width: 560px) {
  .stats {
    grid-template-columns: 1fr;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .cookie-banner {
    left: 0.5rem;
    right: 0.5rem;
    bottom: 0.5rem;
  }
}

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

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}