:root{--build-id:"cd9dcc55-4ec4-41c9-8934-463da3f5a079";}
@charset "UTF-8";

/* CSS Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* CSS Variables - C07 */
:root {
  --primary: #2563eb;
  --bg: #f0f9ff;
  --text: #0c4a6e;
  --accent: #0ea5e9;
  --heading: var(--text);
  --link: var(--text);
  --container: 1200px;
  --section-padding: 4rem 0;
  --gap: 2.5rem;
}

/* F4 Font Stack */
body {
  font-family: "Segoe UI Variable", "Malgun Gothic", "Noto Sans KR", Arial, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0em;
  color: var(--text);
  background: var(--bg);
}

/* Skip Link */
.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;
}

/* H13 Heading Style */
h1 {
  font-size: clamp(1.95rem, 2.5vw + 1rem, 2.95rem);
  font-weight: 660;
  line-height: 1.22;
  letter-spacing: -0.008em;
  color: var(--heading);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.46rem, 1.875vw + 0.75rem, 2.21rem);
  font-weight: 660;
  line-height: 1.27;
  letter-spacing: -0.008em;
  color: var(--heading);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.17rem, 1.5vw + 0.6rem, 1.77rem);
  font-weight: 560;
  line-height: 1.32;
  letter-spacing: -0.008em;
  color: var(--heading);
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

a:focus-visible {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
}

/* N07 Navigation */
header {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.menu-checkbox {
  display: none;
}

.menu-toggle {
  display: none;
  font-size: 1.75rem;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text);
}

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

nav a {
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

nav a:hover::after,
nav a[aria-current="page"]::after {
  width: 100%;
}

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

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .menu-checkbox:checked ~ nav {
    max-height: 500px;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    padding: 1rem 1.5rem;
  }

  nav a {
    display: block;
    padding: 1rem 0;
    border-bottom: 1px solid #f0f0f0;
  }
}

/* Container */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Section - S02 */
section {
  padding: var(--section-padding);
}

/* B13 Button Style */
.btn {
  display: inline-block;
  border: none;
  border-bottom: 3px solid var(--primary);
  padding: 0.75rem 0;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 0.05em;
}

.btn:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
}

/* K18 Card Style */
.card {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 1.5rem 0 1.5rem 1.5rem;
  margin-bottom: var(--gap);
  transition: all 0.3s ease;
}

.card:hover {
  border-left-color: var(--accent);
  transform: translateX(8px);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--gap);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--gap);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  padding: 5rem 0;
  text-align: center;
}

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

.hero p {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

/* Feature Section */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
  margin-top: 3rem;
}

/* Icon */
.icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

/* Footer */
footer {
  background: #fff;
  border-top: 1px solid #e5e7eb;
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.875rem;
}

.footer-info {
  font-size: 0.875rem;
  color: #6b7280;
  margin-bottom: 0.5rem;
}

/* Contact Info */
.contact-info {
  background: #fff;
  border-radius: 0.5rem;
  padding: 2rem;
  margin-top: 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-item:last-child {
  margin-bottom: 0;
}

/* FAQ */
.faq-item {
  background: #fff;
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.faq-question {
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
}

.faq-answer {
  color: var(--text);
  line-height: 1.7;
}

/* List Style */
.styled-list {
  list-style: none;
  margin: 1.5rem 0;
}

.styled-list li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.75rem;
}

.styled-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

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

/* Responsive */
@media (max-width: 768px) {
  :root {
    --section-padding: 3rem 0;
    --gap: 1.5rem;
  }

  .hero {
    padding: 3rem 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

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

/* SVG Styles */
svg {
  max-width: 100%;
  height: auto;
}