:root{--build-id:"5040a616-63c0-4421-889d-e48e288a506d";}
/* 기본 리셋 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* F1: Apple Core 시스템 폰트 */
body {
  font-family: -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0em;
  color: var(--text);
  background-color: var(--bg);
}

/* C01: 블루 색상 팔레트 */
:root {
  --primary: #2563eb;
  --bg: #f8fafc;
  --text: #1e293b;
  --accent: #3b82f6;
  --heading: #1e293b;
  --link: #1e293b;
}

/* S01: 여백 시스템 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

.gap-section {
  gap: 3rem;
}

/* H01: 헤딩 스타일 */
h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--heading);
}

h2 {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--heading);
  margin-bottom: 2rem;
}

h3 {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--heading);
  margin-bottom: 1rem;
}

/* N01: 네비게이션 - 상단 고정 + 좌측 로고 + 우측 메뉴 */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  max-width: 1280px;
  margin: 0 auto;
}

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

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

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

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  width: 1.5rem;
  height: 2px;
  background: var(--text);
  display: block;
}

/* B01: 버튼 스타일 - 라운드 */
.btn {
  display: inline-block;
  border-radius: 9999px;
  padding: 1rem 2.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

/* K01: 카드 스타일 */
.card {
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  padding: 2rem;
  background: #ffffff;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* L01: 레이아웃 - 전폭 히어로 */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #ffffff;
  padding: 8rem 0 6rem;
  margin-top: 4rem;
  text-align: center;
}

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

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

/* 3열 그리드 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

/* 2열 비교 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 3rem;
  align-items: center;
}

/* 푸터 */
footer {
  background: var(--text);
  color: #ffffff;
  padding: 3rem 0 2rem;
  margin-top: 5rem;
}

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

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

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

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
}

/* 접근성 */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: #ffffff;
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
}

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

/* 반응형 */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .nav-menu {
    display: none;
  }

  .hamburger {
    display: flex;
  }

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

  section {
    padding: 3rem 0;
  }

  .hero {
    padding: 6rem 0 4rem;
  }
}

/* 유틸리티 */
.text-center {
  text-align: center;
}

.mb-1 {
  margin-bottom: 1rem;
}

.mb-2 {
  margin-bottom: 2rem;
}

.mt-2 {
  margin-top: 2rem;
}

ul.bullet-list {
  list-style: none;
  padding-left: 0;
}

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

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

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