:root{--build-id:"9fb6bfd4-0d1e-4a66-a501-6ede0a77b8d3";}
/* F3: SUIT 폰트 스택 */
:root {
  --font-sans: "SUIT Variable", "SUIT", -apple-system, BlinkMacSystemFont, system-ui, "Segoe UI", "Apple SD Gothic Neo",
    "Noto Sans KR", sans-serif;
  --font-serif: "Nanum Myeongjo", "Apple SD Gothic Neo", "Noto Serif KR", serif;
}

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

/* 기본 리셋 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-weight: 400;
}

/* S09: 섹션 여백 시스템 */
section {
  padding: 6.5rem 0;
}

.container {
  max-width: 1450px;
  margin: 0 auto;
  padding: 0 2rem;
}

.gap-section {
  gap: 4.5rem;
}

/* H18: 헤딩 스타일 */
h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.005em;
  color: var(--heading);
  font-family: var(--font-serif);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.005em;
  color: var(--heading);
  font-family: var(--font-serif);
  margin-bottom: 2rem;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.005em;
  color: var(--heading);
  font-family: var(--font-serif);
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.5rem;
  font-size: 1rem;
  line-height: 1.8;
}

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

/* N05: 네비게이션 스타일 - 상단 투명 + 좌측 로고 + 우측 메뉴+CTA (인라인) */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 0.5rem 1rem;
  z-index: 100;
}

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

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: transparent;
  z-index: 1000;
  transition: all 0.3s ease;
}

header.scrolled {
  background: rgba(30, 41, 59, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  max-width: 1450px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  font-family: var(--font-serif);
}

header.scrolled .logo {
  color: white;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-menu a {
  font-weight: 600;
  color: var(--primary);
  font-size: 0.95rem;
  position: relative;
}

header.scrolled .nav-menu a {
  color: white;
}

.nav-menu a:hover {
  color: var(--accent);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-menu a:hover::after {
  width: 100%;
}

/* B18: 버튼 스타일 - 미니멀 언더라인 */
.cta-button {
  border: none;
  border-bottom: 2px solid var(--primary);
  background: transparent;
  padding: 0.5rem 0;
  font-weight: 500;
  color: var(--primary);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

header.scrolled .cta-button {
  border-bottom-color: white;
  color: white;
}

.cta-button:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background: var(--primary);
  transition: all 0.3s ease;
}

header.scrolled .hamburger span {
  background: white;
}

/* K18: 카드 스타일 - 미니멀 좌측 보더 */
.card {
  background: transparent;
  border-left: 3px solid var(--primary);
  padding: 1.5rem 0 1.5rem 1.5rem;
  transition: all 0.3s ease;
}

.card:hover {
  border-left-color: var(--accent);
  transform: translateX(5px);
}

/* L29: 데이터 중심 레이아웃 */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--bg) 0%, #e2e8f0 100%);
  padding-top: 5rem;
}

.hero-content {
  max-width: 900px;
}

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

.hero p {
  font-size: 1.125rem;
  color: var(--accent);
  margin-bottom: 2.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  font-family: var(--font-serif);
  display: block;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--accent);
}

.chart-section {
  background: white;
}

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

.chart-item {
  padding: 2rem;
  background: var(--bg);
  border-radius: 0.5rem;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 3rem;
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
}

.icon-item {
  text-align: center;
}

.icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

/* 푸터 */
footer {
  background: var(--primary);
  color: white;
  padding: 3rem 0 2rem;
  margin-top: 6.5rem;
}

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

.footer-section h3 {
  color: white;
  margin-bottom: 1.5rem;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  line-height: 1.8;
}

.footer-section a:hover {
  color: white;
}

.footer-links {
  list-style: none;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

/* 반응형 */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--primary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right 0.3s ease;
    padding: 2rem;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-menu a {
    color: white;
    font-size: 1.25rem;
  }

  .hamburger {
    display: flex;
    z-index: 1001;
  }

  .two-column {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  section {
    padding: 4rem 0;
  }

  .container {
    padding: 0 1.5rem;
  }
}

/* 접근성 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 인라인 SVG 스타일 */
.svg-icon {
  width: 100%;
  height: auto;
  max-width: 400px;
  margin: 2rem auto;
  display: block;
}