:root {
  --bg: #fbfcfa;
  --bg-soft: #f1f5f3;
  --surface: #ffffff;
  --ink: #1a2b28;
  --ink-muted: #4d615c;
  --line: #d7e2de;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --accent-deep: #115e59;
  --warn: #b45309;
  --danger: #b91c1c;
  --ok: #047857;
  --radius: 12px;
  --shadow: 0 18px 40px rgba(15, 55, 48, 0.08);
  --font-display: "Fraunces", "Noto Serif KR", Georgia, serif;
  --font-body: "Noto Sans KR", "Source Sans 3", sans-serif;
  --space: clamp(1rem, 2vw, 1.5rem);
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(94, 234, 212, 0.18), transparent 55%),
    radial-gradient(900px 400px at 100% 0%, rgba(15, 118, 110, 0.08), transparent 50%),
    linear-gradient(180deg, #f7faf8 0%, var(--bg) 28%, #f4f8f6 100%);
  line-height: 1.7;
  min-height: 100vh;
}

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: 560;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
  color: var(--ink-muted);
}

.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% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(251, 252, 250, 0.88);
  border-bottom: 1px solid rgba(215, 226, 222, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

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

.brand-mark {
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 0.4rem;
  background:
    linear-gradient(145deg, #5eead4 0%, #0f766e 70%),
    var(--accent);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  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-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-cta {
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  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);
  border-radius: 0.6rem;
  background: var(--surface);
  cursor: pointer;
  position: relative;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

.nav-toggle-bar {
  top: 50%;
  transform: translateY(-50%);
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

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

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.22);
}

.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-tight {
  padding: clamp(2.5rem, 5vw, 3.5rem) 0;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.lead {
  font-size: 1.125rem;
  max-width: 40rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

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

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

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, transparent 40%, rgba(17, 94, 89, 0.18));
  pointer-events: none;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  padding: 1.25rem 0;
  border-block: 1px solid var(--line);
}

.trust-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.65rem;
  color: var(--ink);
  letter-spacing: -0.03em;
}

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

.feature-list {
  display: grid;
  gap: 1rem;
}

.feature-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.feature-num {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--accent);
  min-width: 2rem;
}

.course-tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

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

.course-tile-body {
  padding: 1.15rem 1.2rem 1.35rem;
}

.course-tile h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.course-tile h3 a {
  text-decoration: none;
  color: inherit;
}

.meta {
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.quote-panel {
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
  padding: 1.5rem 1.6rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

.quote-panel footer {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.page-hero {
  padding: clamp(3rem, 7vw, 5rem) 0 2rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  max-width: 16ch;
}

.split-hero {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(1.5rem, 5vw, 3.5rem);
  align-items: end;
  padding: clamp(3rem, 8vw, 6.5rem) 0 clamp(2rem, 4vw, 3rem);
}

.split-hero .brand-lockup {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0 0 1rem;
  color: var(--ink);
}

.split-hero .brand-lockup span {
  display: block;
  color: var(--accent);
}

.split-hero .hero-copy {
  max-width: 28rem;
}

.split-hero .hero-copy h1 {
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem;
}

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

.price-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  background:
    linear-gradient(180deg, rgba(204, 251, 241, 0.45), #fff 40%);
}

.price-card h3 {
  margin: 0;
  font-size: 1.3rem;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ink);
  letter-spacing: -0.03em;
}

.price-amount small {
  font-size: 0.95rem;
  color: var(--ink-muted);
  font-family: var(--font-body);
}

.price-card ul {
  margin: 0.5rem 0 1rem;
  padding-left: 1.1rem;
  color: var(--ink-muted);
  flex: 1;
}

.price-card li {
  margin-bottom: 0.4rem;
}

.form {
  display: grid;
  gap: 1rem;
}

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

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

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  padding: 0.75rem 0.9rem;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

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

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: 2px solid rgba(15, 118, 110, 0.35);
  border-color: var(--accent);
}

.field-error {
  color: var(--danger);
  font-size: 0.85rem;
  min-height: 1.2em;
}

.form-status {
  padding: 0.85rem 1rem;
  border-radius: 0.7rem;
  display: none;
}

.form-status.is-success {
  display: block;
  background: #ecfdf5;
  color: var(--ok);
  border: 1px solid #a7f3d0;
}

.form-status.is-error {
  display: block;
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
}

.blog-list {
  display: grid;
  gap: 1.5rem;
}

.blog-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.25rem;
  align-items: start;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

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

.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 {
  color: var(--ink-muted);
  padding-left: 1.2rem;
}

.prose li {
  margin-bottom: 0.45rem;
}

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

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

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

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

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
}

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

.faq p {
  margin-top: 0.6rem;
}

.review-stack {
  display: grid;
  gap: 1.25rem;
}

.review-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
}

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

.case-study {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  background: var(--bg-soft);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.5rem;
}

.inline-error {
  margin: 0.75rem 0;
  padding: 0.75rem 1rem;
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
  border-radius: 0.7rem;
}

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  max-width: 520px;
  margin-inline: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem 1.2rem;
  display: none;
}

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

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.reveal {
  animation: fade-up 0.7s ease both;
}

.reveal-delay {
  animation-delay: 0.15s;
}

.site-footer {
  margin-top: 3rem;
  padding: 3rem 0 1.5rem;
  background: #10241f;
  color: #d7e6e1;
}

.site-footer a {
  color: #b7d4cb;
  text-decoration: none;
}

.site-footer a:hover {
  color: #5eead4;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 1.5rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #fff;
  margin: 0 0 0.5rem;
}

.footer-tag,
.footer-address {
  color: #9fb8b0;
  font-size: 0.92rem;
}

.footer-heading {
  margin: 0 0 0.7rem;
  color: #fff;
  font-weight: 700;
  font-size: 0.92rem;
}

.footer-col {
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.88rem;
  color: #8aa59c;
}

.module-list {
  display: grid;
  gap: 0.75rem;
}

.module-item {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.instructor {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 1rem;
  align-items: center;
}

.instructor img {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
}

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

.not-found h1 {
  font-size: clamp(3rem, 10vw, 6rem);
  margin-bottom: 0.2rem;
}

@media (max-width: 900px) {
  .grid-2,
  .grid-3,
  .price-grid,
  .split-hero,
  .blog-item,
  .case-study,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .site-nav {
    display: none;
    position: absolute;
    top: 4.25rem;
    left: 0;
    right: 0;
    background: rgba(251, 252, 250, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 1rem;
    flex-direction: column;
    align-items: stretch;
  }

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

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

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