:root{--build-id:"a69fd75f-a722-40d5-bccb-1853235efd77";}
/* CSS Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Design Tokens - C02: Blue Professional */
:root {
  --primary: #1e40af;
  --bg: #eff6ff;
  --text: #1e3a8a;
  --accent: #60a5fa;
  --heading: #1e3a8a;
  --link: #1e3a8a;
  --card-bg: #ffffff;
  --border: #dbeafe;
  --shadow: rgba(30, 64, 175, 0.1);
}

/* F3: Windows Core Font Stack */
body {
  font-family: "Segoe UI", "Malgun Gothic", "Noto Sans KR", -apple-system, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0em;
  color: var(--text);
  background-color: var(--bg);
}

/* H02: Heading Style - 3rem, 700, 1.2, -0.01em */
h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--heading);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.008em;
  color: var(--heading);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.92rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.006em;
  color: var(--heading);
  margin-bottom: 1rem;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
  border-radius: 0 0 4px 0;
}

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

/* Focus Styles for Accessibility */
a:focus-visible,
input:focus-visible,
label:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* N05: Navigation - Transparent Top + Left Logo + Right Menu+CTA */
header {
  background: rgba(239, 246, 255, 0.95);
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}

.header-container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--accent);
}

/* Mobile Menu Checkbox */
.menu-checkbox {
  display: none;
}

.menu-toggle {
  display: none;
  font-size: 1.75rem;
  color: var(--primary);
  cursor: pointer;
  user-select: none;
}

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

nav a {
  color: var(--link);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s;
}

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

/* S05: Section Spacing - 7rem 0, Container 1500px, Gap 5rem */
section {
  padding: 7rem 0;
}

.container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* L21: Classic Hero Layout */
.hero-section {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  padding: 5rem 0;
}

.hero-container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 5rem;
  align-items: center;
}

.hero-content h1 {
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  color: var(--text);
}

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

.hero-visual svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 4px 12px var(--shadow));
}

/* B02: Button Style - Round with Border */
.cta-button {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 9999px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s;
  border: 2px solid var(--primary);
}

.cta-button.primary {
  background: var(--primary);
  color: #ffffff;
}

.cta-button.primary:hover {
  background: #1e3a8a;
  border-color: #1e3a8a;
  transform: translateY(-2px);
}

.cta-button.secondary {
  background: transparent;
  color: var(--primary);
}

.cta-button.secondary:hover {
  background: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Two Column Layout */
.content-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  margin-top: 3rem;
}

.content-columns .column p {
  margin-bottom: 1.5rem;
}

.content-columns svg {
  width: 100%;
  height: auto;
}

/* Features Grid */
.features-section {
  background: var(--card-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5rem;
  margin-top: 3rem;
}

/* K02: Card Style - Soft Border Radius with Shadow */
.feature-card {
  background: var(--card-bg);
  border-radius: 0.5rem;
  box-shadow: 0 2px 8px var(--shadow);
  padding: 1.5rem;
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
  color: var(--heading);
}

.feature-card p {
  color: var(--text);
  line-height: 1.7;
}

/* Content Layout */
.content-layout p {
  margin-bottom: 1.5rem;
}

.visual-element {
  margin-top: 3rem;
  text-align: center;
}

.visual-element svg {
  max-width: 100%;
  height: auto;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  text-align: center;
}

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

.cta-section p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: var(--text);
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
footer {
  background: #1e3a8a;
  color: #ffffff;
  padding: 3rem 0 1.5rem;
}

.footer-container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-brand h3 {
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  color: #dbeafe;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: #dbeafe;
  text-decoration: none;
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-contact p {
  color: #dbeafe;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(219, 234, 254, 0.2);
  color: #dbeafe;
  font-size: 0.9rem;
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  padding: 4rem 0;
  text-align: center;
}

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

.page-header p {
  font-size: 1.15rem;
  color: var(--text);
}

/* Content Section */
.content-section {
  background: var(--card-bg);
}

.content-block {
  margin-top: 2rem;
  margin-bottom: 3rem;
}

.content-block p {
  margin-bottom: 1.5rem;
  line-height: 1.75;
}

.visual-divider {
  margin: 4rem 0;
  text-align: center;
}

/* Method Card */
.method-card {
  background: var(--bg);
  border-radius: 0.5rem;
  box-shadow: 0 2px 8px var(--shadow);
  padding: 1.5rem;
  margin: 3rem 0;
  border-left: 4px solid var(--primary);
}

.method-card .card-icon {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

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

.method-card p {
  line-height: 1.75;
}

/* Guide Card */
.guide-card {
  background: var(--bg);
  border-radius: 0.5rem;
  box-shadow: 0 2px 8px var(--shadow);
  padding: 1.5rem;
  margin: 3rem 0;
  border-top: 3px solid var(--primary);
}

.guide-card .card-icon {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

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

.guide-card p {
  line-height: 1.75;
}

/* Contact Section */
.contact-section {
  background: var(--card-bg);
}

.contact-intro {
  text-align: center;
  margin-bottom: 4rem;
}

.contact-intro p {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text);
}

.contact-methods {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  margin-bottom: 4rem;
}

.contact-card {
  background: var(--bg);
  border-radius: 0.5rem;
  box-shadow: 0 2px 8px var(--shadow);
  padding: 2rem;
  text-align: center;
  transition: transform 0.3s;
}

.contact-card:hover {
  transform: translateY(-4px);
}

.contact-icon {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

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

.contact-card p {
  color: var(--text);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

.contact-link {
  display: block;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  margin: 1rem 0;
}

.contact-note {
  font-size: 0.9rem;
  color: #64748b;
  font-style: italic;
}

.contact-info {
  background: var(--bg);
  border-radius: 0.5rem;
  padding: 2rem;
  margin-top: 3rem;
}

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

.contact-info p {
  line-height: 1.7;
  color: var(--text);
}

/* Document Container for Privacy/Terms */
.doc-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 2rem;
  text-align: center;
}

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

.doc-container p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.doc-container a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 2px solid var(--primary);
  padding-bottom: 2px;
}

.doc-container a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Responsive Design */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(239, 246, 255, 0.98);
    border-bottom: 2px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
  }

  .menu-checkbox:checked ~ nav {
    max-height: 400px;
  }

  nav ul {
    flex-direction: column;
    padding: 1.5rem;
    gap: 0;
  }

  nav ul li {
    width: 100%;
    border-bottom: 1px solid var(--border);
  }

  nav ul li:last-child {
    border-bottom: none;
  }

  nav a {
    display: block;
    padding: 1rem 0;
    border-bottom: none;
  }

  nav a:hover,
  nav a[aria-current="page"] {
    background: var(--border);
    border-bottom: none;
    padding-left: 0.5rem;
  }

  section {
    padding: 4rem 0;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .content-columns {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-methods {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}

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

  .container,
  .container-narrow {
    padding: 0 1rem;
  }

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

  .cta-button {
    width: 100%;
    text-align: center;
  }
}