:root{--build-id:"8cb8b373-3613-401f-a72d-2a164ba86c3c";}
/* CSS Variables - C36 Dark/Neutral Palette */
:root {
  --primary: #18181b;
  --background: #fafafa;
  --text: #09090b;
  --accent: #52525b;
  --heading: var(--text);
  --link: var(--text);
  --border: #e5e7eb;
  --card-bg: #ffffff;
}

/* F7 Neutral Core Font Stack */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, "Noto Sans KR", "Malgun Gothic", -apple-system, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0em;
  color: var(--text);
  background: var(--background);
}

/* H18 Heading Styles */
h1 {
  font-size: 2.75rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.005em;
  color: var(--heading);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.2rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.005em;
  color: var(--heading);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.76rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.005em;
  color: var(--heading);
  margin-bottom: 1rem;
}

h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 0.75rem;
}

/* S01 Spacing System */
section {
  padding: 5rem 0;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Skip to Content Link - Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Focus Styles - Accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
label:focus-visible {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
}

/* N13 Navigation: Top Transparent + Left Menu + Center Logo + Right CTA + Hamburger */
header {
  background: transparent;
  position: sticky;
  top: 0;
  z-index: 999;
  backdrop-filter: blur(10px);
  background: rgba(250, 250, 250, 0.95);
  border-bottom: 1px solid var(--border);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.nav-left {
  flex: 1;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-right {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

header nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

header nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* B18 Button Style: Underline Minimal */
.cta-link {
  border-bottom: 2px solid var(--primary);
  padding: 0.5rem 0;
  font-weight: 500;
}

.menu-checkbox {
  display: none;
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
    position: absolute;
    right: 2rem;
    z-index: 1001;
  }

  .logo {
    position: relative;
    left: auto;
    transform: none;
  }

  .nav-left,
  .nav-right {
    position: fixed;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100vh;
    background: var(--background);
    flex-direction: column;
    justify-content: center;
    transition: left 0.3s;
    z-index: 1000;
  }

  .menu-checkbox:checked ~ .nav-left,
  .menu-checkbox:checked ~ .nav-right {
    left: 0;
  }

  header nav ul {
    flex-direction: column;
    gap: 2rem;
  }

  .nav-right {
    top: 0;
  }
}

/* L19 Layout: Dynamic Hero → Tab Content → Checklist → Multi CTA */

/* Hero Dynamic */
.hero-dynamic {
  display: flex;
  align-items: center;
  gap: 3rem;
  padding: 5rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.hero-content {
  flex: 1;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--accent);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.feature-icon {
  color: var(--primary);
  font-size: 1.25rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* B18 Button Styles */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s;
  border-bottom: 2px solid var(--primary);
  background: transparent;
}

.btn-primary {
  color: var(--primary);
}

.btn-secondary {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

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

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

/* Tab Content Section */
.tab-content-section {
  background: var(--card-bg);
  padding: 5rem 0;
}

.tab-container {
  margin-top: 2rem;
}

.tab-buttons {
  display: flex;
  gap: 1rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 2rem;
}

.tab-btn {
  padding: 1rem 2rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  cursor: pointer;
  transition: all 0.3s;
  margin-bottom: -2px;
}

.tab-btn.active {
  border-bottom-color: var(--primary);
  color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-inner {
  padding: 2rem 0;
}

.checklist {
  list-style: none;
  margin-top: 1.5rem;
}

.checklist li {
  padding: 0.75rem 0 0.75rem 2rem;
  position: relative;
  border-left: 3px solid var(--primary);
  margin-bottom: 1rem;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0.5rem;
  color: var(--primary);
  font-weight: 700;
}

/* Checklist Section */
.checklist-section {
  background: var(--background);
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
  margin-top: 2rem;
}

/* K18 Card Style: Left Border Minimal */
.checklist-card {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 1.5rem 0 1.5rem 1.5rem;
}

.check-icon {
  font-size: 2rem;
  color: var(--primary);
  display: block;
  margin-bottom: 1rem;
}

.checklist-card h3 {
  margin-bottom: 1rem;
}

.checklist-card p {
  color: var(--accent);
  line-height: 1.7;
}

/* Multi CTA Section */
.multi-cta-section {
  background: var(--card-bg);
}

.section-desc {
  text-align: center;
  color: var(--accent);
  margin-bottom: 3rem;
  font-size: 1.125rem;
}

.cta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  margin-top: 2rem;
}

.cta-box {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 2rem 0 2rem 2rem;
  text-align: left;
}

.cta-box h3 {
  margin-bottom: 1rem;
}

.cta-box p {
  color: var(--accent);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* Info Section */
.info-section {
  background: var(--background);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  margin-top: 2rem;
}

.info-card {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 2rem 0 2rem 2rem;
  text-align: left;
}

.info-card svg {
  margin-bottom: 1.5rem;
}

.info-card h3 {
  margin-bottom: 1rem;
}

.info-card p {
  color: var(--accent);
  line-height: 1.7;
}

/* Page Hero */
.page-hero {
  background: var(--card-bg);
  padding: 4rem 0;
  text-align: center;
}

.page-hero h1 {
  margin-bottom: 1rem;
}

/* Content Section */
.content-section {
  padding: 5rem 0;
}

.content-card {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 2rem 0 2rem 2rem;
  margin-bottom: 3rem;
}

.content-card h2 {
  margin-bottom: 1.5rem;
}

.content-card p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
  color: var(--accent);
}

/* Principle List */
.principle-list {
  margin-top: 2rem;
}

.principle-item {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
  border-left: 3px solid var(--primary);
  padding-left: 2rem;
}

.principle-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  opacity: 0.3;
  flex-shrink: 0;
}

.principle-item h3 {
  margin-bottom: 0.75rem;
}

.principle-item p {
  color: var(--accent);
  line-height: 1.7;
}

/* Contact Section */
.contact-section {
  padding: 5rem 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.contact-card {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 2rem 0 2rem 2rem;
  text-align: left;
}

.contact-card svg {
  margin-bottom: 1.5rem;
}

.contact-card h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.contact-card p {
  color: var(--accent);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.contact-desc {
  font-size: 0.9rem;
  color: var(--accent);
}

.contact-notice {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 2rem 0 2rem 2rem;
  margin-top: 3rem;
}

.contact-notice h2 {
  margin-bottom: 1.5rem;
}

.contact-notice p {
  color: var(--accent);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

/* Testimonial Section */
.testimonial-card {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 2rem 0 2rem 2rem;
  margin-bottom: 3rem;
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.testimonial-icon {
  font-size: 1.5rem;
  color: var(--primary);
}

.testimonial-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0;
}

.testimonial-card p {
  color: var(--accent);
  line-height: 1.7;
}

/* CTA Section */
.cta-section {
  background: var(--card-bg);
  padding: 5rem 0;
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--accent);
  margin-bottom: 2rem;
  font-size: 1.125rem;
}

/* Footer */
footer {
  background: var(--primary);
  color: #ffffff;
  padding: 3rem 0 1.5rem;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-brand h3 {
  color: #ffffff;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
}

.footer-col h4 {
  color: #ffffff;
  margin-bottom: 1rem;
}

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

.footer-col li {
  margin-bottom: 0.75rem;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-col p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 1.5rem;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* Doc Container (Privacy/Terms) */
.doc-container {
  max-width: 800px;
  margin: 5rem auto;
  padding: 2rem;
  text-align: center;
}

.doc-container h1 {
  margin-bottom: 2rem;
}

.doc-container p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
  color: var(--accent);
}

.doc-container a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 2px solid var(--primary);
  padding-bottom: 0.25rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.4rem;
  }

  section {
    padding: 3rem 0;
  }

  .hero-dynamic {
    flex-direction: column;
    padding: 3rem 2rem;
  }

  .tab-buttons {
    flex-wrap: wrap;
  }

  .tab-btn {
    flex: 1;
    min-width: 100px;
  }

  .footer-main {
    grid-template-columns: 1fr;
  }

  .principle-item {
    flex-direction: column;
    gap: 1rem;
  }

  .principle-number {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    text-align: center;
  }
}