:root{--build-id:"11ba05bd-cb10-45aa-a079-087651571df6";}
/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Color Palette C34 */
:root {
  --primary: #1e293b;
  --bg: #f1f5f9;
  --text: #0f172a;
  --accent: #64748b;
  --heading: var(--text);
  --link: var(--text);
}

/* Font System F3 (Windows Core) */
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);
}

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

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

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

/* Layout Structure L19 + Section S01 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

.section-gap {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* Button Style B18 */
.btn {
  border-bottom: 2px solid var(--primary);
  background: transparent;
  padding: 0.5rem 0;
  font-weight: 500;
  color: var(--primary);
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s ease;
}

.btn:hover {
  opacity: 0.7;
}

/* Navigation Style N05 */
header {
  background: transparent;
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background 0.3s ease;
}

header.scrolled {
  background: var(--bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

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

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

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

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

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

.menu-checkbox {
  display: none;
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--primary);
}

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

.card:hover {
  transform: translateX(5px);
}

/* Footer */
footer {
  background: var(--primary);
  color: #fff;
  padding: 3rem 0 2rem;
  margin-top: 5rem;
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.footer-section h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: #fff;
}

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

.footer-section a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  font-size: 0.9rem;
}

/* Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 10000;
}

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

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

/* Privacy/Terms Document */
.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: 1.8;
}

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

  h2 {
    font-size: 1.6rem;
  }

  h3 {
    font-size: 1.3rem;
  }

  section {
    padding: 3rem 0;
  }

  .container {
    padding: 0 1rem;
  }

  .menu-toggle {
    display: block;
  }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .menu-checkbox:checked ~ nav {
    max-height: 500px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  nav ul {
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
  }

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

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 6rem 0 5rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: var(--accent);
  animation: fadeInUp 0.8s ease 0.2s backwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Icon Styles */
.icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

/* Content Sections */
.content-block {
  margin-bottom: 3rem;
}

.content-block h3 {
  margin-bottom: 1rem;
}

.content-block p {
  margin-bottom: 1rem;
}

/* Tab Content (L19) */
.tab-container {
  margin: 3rem 0;
}

.tab-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
}

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

/* Checklist Style (L19) */
.checklist {
  list-style: none;
  display: grid;
  gap: 1rem;
}

.checklist li {
  padding-left: 2rem;
  position: relative;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Contact Info */
.contact-info {
  display: grid;
  gap: 1.5rem;
  margin: 2rem 0;
}

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

.contact-item span {
  font-size: 1.5rem;
}

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