:root {
  --bg: #fafbfa;
  --bg-soft: #f1f5f3;
  --surface: #ffffff;
  --ink: #1a2e2a;
  --ink-muted: #5a6e68;
  --accent: #3d7a6c;
  --accent-soft: #7eb8a8;
  --accent-warm: #c4865a;
  --line: #dde5e1;
  --error: #b5403a;
  --success: #2f6b4f;
  --shadow: 0 12px 40px rgba(26, 46, 42, 0.06);
  --radius: 12px;
  --font-display: "Fraunces", "Noto Serif KR", Georgia, serif;
  --font-body: "Noto Sans KR", "Pretendard", sans-serif;
  --space: clamp(1rem, 2vw, 1.5rem);
  --max: 1120px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(126, 184, 168, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(196, 134, 90, 0.08), transparent);
  min-height: 100vh;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 560;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.35rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.45rem); }

p { margin: 0 0 1em; }

ul { margin: 0 0 1em; padding-left: 1.2em; }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 1000;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 251, 250, 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 {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background:
    linear-gradient(145deg, var(--accent-soft), var(--accent));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.25);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 0.4rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header-h);
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    padding: 1rem 1.25rem 1.5rem;
    display: none;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul {
    flex-direction: column;
    gap: 0.85rem;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  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: #326558; color: #fff; }

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

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

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

/* Hero variants */
.hero-home {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
}

.hero-home .container {
  display: grid;
  gap: 2.5rem;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--accent);
  margin: 0 0 0.75rem;
  opacity: 0;
  animation: rise 0.7s ease forwards;
}

.hero-home h1 {
  max-width: 14ch;
  margin-bottom: 0.8rem;
  opacity: 0;
  animation: rise 0.7s ease 0.1s forwards;
}

.hero-lead {
  max-width: 38ch;
  font-size: 1.15rem;
  color: var(--ink-muted);
  opacity: 0;
  animation: rise 0.7s ease 0.2s forwards;
}

.hero-visual {
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 320px;
  position: relative;
  box-shadow: var(--shadow);
  opacity: 0;
  animation: rise 0.8s ease 0.25s forwards;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
}

@media (min-width: 900px) {
  .hero-home .container {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: end;
  }
}

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

.page-hero {
  padding: clamp(2.5rem, 6vw, 4rem) 0 2rem;
}

.page-hero p {
  max-width: 52ch;
  color: var(--ink-muted);
}

.page-hero-media {
  margin-top: 2rem;
  border-radius: var(--radius);
  overflow: hidden;
  max-height: 360px;
}

.page-hero-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

/* Sections */
.section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

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

.section-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-head p {
  color: var(--ink-muted);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-warm);
  margin-bottom: 0.5rem;
}

/* Proof strip */
.proof-strip {
  border-block: 1px solid var(--line);
  padding: 1.75rem 0;
}

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

.proof-grid strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 560;
  color: var(--accent);
}

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

@media (max-width: 640px) {
  .proof-grid { grid-template-columns: 1fr; gap: 1.25rem; }
}

/* Feature list — not cards by default for content, but interactive course tiles need containers */
.benefit-list {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .benefit-list { grid-template-columns: repeat(3, 1fr); }
}

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

.benefit-item p {
  color: var(--ink-muted);
  margin: 0;
}

.benefit-num {
  font-family: var(--font-display);
  color: var(--accent-soft);
  font-size: 1.4rem;
  display: block;
  margin-bottom: 0.4rem;
}

/* Course / blog tiles — interaction containers */
.tile-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 700px) {
  .tile-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .tile-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

.tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.tile-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-soft);
}

.tile-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.tile:hover .tile-media img {
  transform: scale(1.04);
}

.tile-body {
  padding: 1.25rem 1.35rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tile-body h3 {
  font-size: 1.2rem;
  margin-bottom: 0.45rem;
}

.tile-body h3 a {
  color: var(--ink);
  text-decoration: none;
}

.tile-body h3 a:hover { color: var(--accent); }

.tile-body p {
  color: var(--ink-muted);
  font-size: 0.95rem;
  flex: 1;
}

.tile-meta {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 0.75rem;
}

/* Testimonials */
.quote-list {
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .quote-list.cols-2 { grid-template-columns: 1fr 1fr; }
}

.quote {
  padding: 0;
  margin: 0;
  border: 0;
}

.quote p {
  font-size: 1.08rem;
  margin-bottom: 1rem;
}

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

.quote-rating {
  color: var(--accent-warm);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

/* Pricing */
.price-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 800px) {
  .price-grid { grid-template-columns: repeat(3, 1fr); align-items: stretch; }
}

.price-tier {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.price-tier.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

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

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

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

.price-tier ul {
  padding-left: 1.1em;
  color: var(--ink-muted);
  flex: 1;
  margin-bottom: 1.5rem;
}

.price-note {
  font-size: 0.9rem;
  color: var(--ink-muted);
  margin-top: 1.5rem;
}

/* Forms */
.form-panel {
  max-width: 560px;
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
}

.form-group .hint {
  font-weight: 400;
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--surface);
  color: var(--ink);
}

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

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

.field-error {
  color: var(--error);
  font-size: 0.85rem;
  margin-top: 0.35rem;
  display: none;
}

.form-group.has-error .field-error { display: block; }

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: var(--error);
}

.form-status {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  border-radius: 8px;
  display: none;
}

.form-status.is-success {
  display: block;
  background: #e8f3ec;
  color: var(--success);
}

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

.contact-layout {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 860px) {
  .contact-layout { grid-template-columns: 1.2fr 0.8fr; }
}

.contact-aside {
  padding: 1.5rem 0;
}

.contact-aside h2 { font-size: 1.3rem; }

.contact-aside p,
.contact-aside address {
  font-style: normal;
  color: var(--ink-muted);
  margin-bottom: 1rem;
}

/* Article */
.article-meta {
  color: var(--ink-muted);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}

.prose {
  max-width: 68ch;
}

.prose h2 { margin-top: 2.2rem; }
.prose h3 { margin-top: 1.6rem; }

.prose img {
  border-radius: var(--radius);
  margin: 1.5rem 0;
}

.module-list {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
}

.module-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.module-list strong {
  display: block;
  margin-bottom: 0.25rem;
}

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

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

.faq details p {
  margin: 0.75rem 0 0;
  color: var(--ink-muted);
}

.instructor {
  display: grid;
  gap: 1.25rem;
  align-items: center;
  margin: 2rem 0;
}

@media (min-width: 600px) {
  .instructor {
    grid-template-columns: 120px 1fr;
  }
}

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

.case-study {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
}

.case-study h3 { margin-bottom: 0.5rem; }

/* Legal */
.legal-content {
  max-width: 72ch;
  padding-bottom: 3rem;
}

.legal-content h2 {
  margin-top: 2rem;
  font-size: 1.35rem;
}

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

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

.legal-content th {
  background: var(--bg-soft);
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--surface);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 30px rgba(26, 46, 42, 0.08);
  padding: 1.15rem 0;
  transform: translateY(110%);
  transition: transform 0.35s ease;
}

.cookie-banner.is-visible {
  transform: translateY(0);
}

.cookie-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

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

.cookie-banner .error-inline {
  width: 100%;
  color: var(--error);
  font-size: 0.85rem;
  margin: 0;
}

/* 404 */
.error-page {
  text-align: center;
  padding: 6rem 0 5rem;
}

.error-page h1 {
  font-size: clamp(3rem, 10vw, 5rem);
  color: var(--accent-soft);
}

/* Footer */
.site-footer {
  background: #152624;
  color: #c5d4cf;
  padding: 3rem 0 1.5rem;
  margin-top: 3rem;
}

.site-footer a {
  color: #dce8e3;
  text-decoration: none;
}

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

.footer-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  }
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 0.5rem;
}

.footer-tag {
  font-size: 0.92rem;
  line-height: 1.6;
}

.footer-heading {
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

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

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

.footer-contact p {
  font-size: 0.88rem;
  line-height: 1.55;
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 0.85rem;
}

.footer-bottom p { margin: 0; }

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

.cta-band {
  padding: clamp(2.5rem, 5vw, 3.5rem) 0;
  text-align: center;
}

.cta-band h2 { margin-bottom: 0.5rem; }

.cta-band p {
  color: var(--ink-muted);
  max-width: 40ch;
  margin-inline: auto;
}

.split-text {
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .split-text {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

.avatar-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-top: 1rem;
}

.avatar-row img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}