:root{--build-id:"2ad433d7-cddb-46ce-8bee-cd80f2948ac1";}
@charset "UTF-8";

/* ==================== */
/* CSS Reset & Base */
/* ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

/* F1: Apple Core */
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);
}

/* ==================== */
/* C12: 색상 변수 */
/* ==================== */
:root {
  --primary: #0d9488;
  --bg: #ccfbf1;
  --text: #115e59;
  --accent: #14b8a6;
  --heading: var(--text);
  --link: var(--text);
}

/* ==================== */
/* H06: 반응형 헤딩 (clamp) */
/* ==================== */
h1 {
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-transform: capitalize;
  color: var(--heading);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--heading);
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.875rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--heading);
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.8;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==================== */
/* 접근성: 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;
}

/* ==================== */
/* N01: 네비게이션 */
/* ==================== */
header {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--primary);
  z-index: 50;
  padding: 1rem 0;
}

.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);
}

.menu-checkbox {
  display: none;
}

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

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

nav a {
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}

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

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

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-top: 1px solid var(--primary);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
  }

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

  nav ul {
    flex-direction: column;
    gap: 0;
    padding: 1rem 2rem;
  }

  nav li {
    border-bottom: 1px solid rgba(13, 148, 136, 0.1);
  }

  nav a {
    display: block;
    padding: 1rem 0;
  }
}

/* ==================== */
/* S01: 섹션 간격 */
/* ==================== */
section {
  padding: 5rem 0;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ==================== */
/* B06: 버튼 스타일 */
/* ==================== */
.btn {
  display: inline-block;
  border-radius: 0;
  padding: 1rem 2.5rem;
  font-weight: 600;
  border: 3px solid var(--primary);
  background: var(--primary);
  color: #fff;
  text-align: center;
  transition: all 0.2s;
  cursor: pointer;
}

.btn:hover {
  background: transparent;
  color: var(--primary);
  opacity: 1;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
}

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

/* ==================== */
/* K06: 카드 스타일 */
/* ==================== */
.card {
  border: 1px solid #d1d5db;
  border-radius: 1rem;
  padding: 1.5rem;
  background: #fff;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* ==================== */
/* L13: 레이아웃 구조 */
/* ==================== */

/* 비대칭 히어로 */
.hero {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: center;
  min-height: 500px;
}

/* 3열 카드 */
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}

/* 타임라인 */
.timeline {
  position: relative;
  padding-left: 3rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -3rem;
  top: 0.25rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg);
}

/* 사이드바 CTA */
.sidebar-cta {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
}

.cta-box {
  background: var(--primary);
  color: #fff;
  padding: 2rem;
  border-radius: 1rem;
  position: sticky;
  top: 100px;
  height: fit-content;
}

.cta-box h3 {
  color: #fff;
}

/* ==================== */
/* 반응형 */
/* ==================== */
@media (max-width: 1024px) {
  .hero,
  .three-col,
  .sidebar-cta {
    grid-template-columns: 1fr;
  }

  .cta-box {
    position: static;
  }
}

@media (max-width: 768px) {
  section {
    padding: 3rem 0;
  }

  .container {
    padding: 0 1.5rem;
  }

  .timeline {
    padding-left: 2rem;
  }

  .timeline-item {
    padding-left: 1.5rem;
  }

  .timeline-item::before {
    left: -2.25rem;
    width: 1rem;
    height: 1rem;
  }
}

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

footer a {
  color: #fff;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ==================== */
/* Privacy/Terms 문서 */
/* ==================== */
.doc-container {
  max-width: 800px;
  margin: 5rem auto;
  padding: 2rem;
  text-align: center;
}