@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700;800&family=Noto+Sans+KR:wght@400;500;700;900&display=swap');

/* ━━━ CSS 변수 ━━━ */
:root {
  /* Editorial 스타일: 신뢰감 있는 다크 인디고와 강렬한 대비 */
  --primary: #1a237e; 
  --secondary: #3949ab;
  --accent: #ff6d00;
  --text: #1a1a2e;
  --text-light: #666666;
  --bg: #ffffff;
  --bg-sub: #f4f7fa;
  --header-h: 70px;

  /* ★ 명암비 필수 변수 (WCAG AA 4.5:1 이상) ★ */
  /* --primary(#1a237e)는 명도 50% 미만의 어두운 색임 */
  --text-on-primary: #ffffff;
  --text-on-primary-muted: rgba(255, 255, 255, 0.8);
  
  /* 테두리 기반 디자인을 위한 변수 */
  --border-color: #d1d9e6;
  --border-strong: #1a237e;
}

/* ━━━ 리셋 ━━━ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { 
  font-family: 'Inter', 'Noto Sans KR', sans-serif; 
  color: var(--text); 
  background-color: var(--bg);
  line-height: 1.6;
}

/* ━━━ 헤더 (수치 고정) ━━━ */
header {
  position: fixed; top:0; left:0; width:100%;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5%;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  z-index: 1000;
  transition: background 0.3s;
  border-bottom: 1px solid var(--border-color);
}
header.scrolled { background:#fff; box-shadow:0 2px 20px rgba(0,0,0,0.12); }
.logo {
  font-size:1.4rem; font-weight:800; color:var(--primary);
  text-decoration:none; white-space:nowrap; flex-shrink:0;
  letter-spacing: -0.03em;
}
nav { display:flex; align-items:center; }
.nav-menu {
  display:flex; align-items:center; gap:2.5rem;
  list-style:none; margin:0; padding:0;
}
.nav-menu a {
  font-size:0.95rem; font-weight:700; color:var(--text);
  text-decoration:none; transition:color 0.2s;
  text-transform: uppercase;
}
.nav-menu a:hover, .nav-menu a.active { color:var(--primary); }
.hamburger { display:none; flex-direction:column; gap:5px; cursor:pointer; background:none; border:none; padding:4px; }
.hamburger span { display:block; width:24px; height:2px; background:var(--text); transition:transform 0.3s; }

@media(max-width:768px){
  .hamburger { display:flex; }
  .nav-menu {
    display:none; position:fixed; top:var(--header-h); left:0; right:0;
    background:#fff; flex-direction:column; gap:0; padding:1rem 0;
    box-shadow:0 4px 12px rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-menu.open { display:flex; }
  .nav-menu li { width:100%; text-align:center; padding:0.75rem 0; }
}

/* ━━━ 히어로 변형: editorial (split-screen) ━━━ */
.hero.hero-split {
  height:90vh; min-height:600px; max-height:900px;
  display:grid; grid-template-columns:1fr 1fr; overflow:hidden;
  border-bottom: 1px solid var(--border-strong);
}
.hero-split .hero-text-panel {
  background:var(--primary);
  display:flex; flex-direction:column; justify-content:center;
  padding:4rem 4rem 4rem 10%;
  padding-top:calc(var(--header-h) + 4rem);
}
.hero-split .hero-text-panel h2 {
  font-size:clamp(2rem, 5vw, 4rem); font-weight:800; color:var(--text-on-primary);
  line-height:1.1; margin-bottom:2rem; letter-spacing:-0.04em;
  word-break: keep-all;
}
.hero-split .hero-text-panel p {
  font-size:clamp(1.1rem, 2vw, 1.4rem); color:var(--text-on-primary-muted); 
  line-height:1.7; margin-bottom: 3rem;
}
.hero-split .hero-image-panel { 
  background-size:cover; 
  background-position:center;
  background-image: url('https://images.unsplash.com/photo-1517245386807-bb43f82c33c4?auto=format&fit=crop&q=80&w=1000');
  position: relative;
}
.hero-split .hero-image-panel::after {
    content: ''; position: absolute; inset: 0; background: rgba(26, 35, 126, 0.1);
}

@media(max-width:768px) {
  .hero.hero-split { grid-template-columns:1fr; min-height:70vh; }
  .hero-split .hero-image-panel { display:none; }
  .hero-split .hero-text-panel { padding:calc(var(--header-h)+3rem) 1.5rem 3rem; }
}

/* ━━━ 섹션 공통 ━━━ */
section { padding:100px 0; width:100%; border-bottom: 1px solid var(--border-color); }
section:nth-of-type(even) { background:var(--bg-sub); }
.container { max-width:1300px; width:90%; margin:0 auto; }

.section-header { text-align:left; margin-bottom:4.5rem; border-left: 5px solid var(--primary); padding-left: 1.5rem; }
.section-header h2 {
  font-size:clamp(2rem, 4vw, 3rem); font-weight:900;
  margin-bottom:1rem; color:var(--primary); letter-spacing: -0.03em;
}
.section-header p { font-size:1.1rem; color:var(--text-light); max-width:700px; line-height:1.7; }

/* ━━━ 카드 (Editorial: 테두리 중심) ━━━ */
.card-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0; /* 붙여서 테두리 강조 */
  width:100%;
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
}
.card {
  background:#fff; border-radius:0;
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  box-shadow:none;
  overflow:hidden; transition: background 0.3s, transform 0.3s;
  display:flex; flex-direction:column; text-align:left;
}
.card:hover { background: var(--bg-sub); transform: none; }
.card-img { width:100%; aspect-ratio:4/3; object-fit:cover; filter: grayscale(100%); transition: 0.3s; }
.card:hover .card-img { filter: grayscale(0%); }
.card-icon-wrap { padding:2.5rem 2rem 0; font-size:3rem; display:flex; justify-content:flex-start; color: var(--primary); }
.card-body { padding:2rem; flex:1; display:flex; flex-direction:column; align-items:flex-start; }
.card-body h3 { font-size:1.3rem; font-weight:800; margin-bottom:1rem; color:var(--text); letter-spacing: -0.02em; }
.card-body p { font-size:1rem; color:var(--text-light); line-height:1.7; flex:1; text-align:left; }

@media(max-width:900px)  { .card-grid { grid-template-columns:repeat(2,1fr); } }
@media(max-width:580px)  { .card-grid { grid-template-columns:1fr; } }

/* ━━━ 통계 ━━━ */
.stats-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:0; text-align:center; width:100%;
  border: 1px solid var(--border-color);
}
.stat-item { padding:3.5rem 1rem; background: #fff; border-right: 1px solid var(--border-color); }
.stat-item:last-child { border-right: none; }
.stat-number { display:block; font-size:clamp(3rem, 6vw, 4.5rem); font-weight:900; color:var(--primary); line-height:1; letter-spacing: -0.05em; }
.stat-label { font-size:0.9rem; font-weight: 700; color:var(--text-light); margin-top:0.75rem; display:block; text-transform: uppercase; }

/* ━━━ 프로세스 ━━━ */
.process-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:2rem; width:100%;
}
.process-step { text-align:left; padding:2.5rem; border: 1px solid var(--border-color); background: #fff; position: relative; }
.process-num {
  font-size:4rem; font-weight:900; color: var(--primary); opacity: 0.1;
  position: absolute; top: 1rem; right: 1.5rem; line-height: 1;
}
.process-step h3 { font-size:1.2rem; font-weight:800; margin-bottom:1rem; color: var(--primary); position: relative; }
.process-step p { font-size:0.95rem; color:var(--text-light); line-height:1.8; position: relative; }

/* ━━━ 텍스트+이미지 ━━━ */
.text-image-wrap { display:grid; grid-template-columns:1.2fr 0.8fr; gap:5rem; align-items:center; width:100%; }
.text-image-wrap .text-content { display:flex; flex-direction:column; gap:1.5rem; }
.text-image-wrap .text-content h3 { font-size:2rem; font-weight:900; color:var(--primary); letter-spacing: -0.03em; }
.text-image-wrap .text-content p { font-size:1.1rem; color:var(--text-light); line-height:1.8; }
.text-image-wrap img { width:100%; border-radius:0; border: 1px solid var(--border-strong); object-fit:cover; }

/* ━━━ 추천사 ━━━ */
.testimonial-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:2rem; }
.testimonial-card {
  background:#fff; border: 1px solid var(--border-color); padding:2.5rem;
  display:flex; flex-direction:column; gap:1.5rem;
}
.testimonial-quote {
  font-size:1.05rem; color:var(--text); line-height:1.8; font-weight: 500; flex:1;
  position: relative;
}
.testimonial-quote::before { content: '"'; color: var(--primary); font-size: 3rem; position: absolute; top: -1.5rem; left: -0.5rem; opacity: 0.2; }
.testimonial-author { display:flex; align-items:center; gap:1rem; padding-top: 1.5rem; border-top: 1px solid var(--bg-sub); }
.testimonial-avatar {
  width:44px; height:44px; border-radius:0;
  background:var(--primary); color: #fff; display:flex; align-items:center; justify-content:center; font-size:1.2rem; font-weight: 800;
}
.testimonial-name { font-weight:800; font-size:1rem; color:var(--text); }
.testimonial-role { font-size:0.85rem; color:var(--text-light); }
@media(max-width:900px) { .testimonial-grid { grid-template-columns:1fr; } }

/* ━━━ 타임라인 ━━━ */
.timeline { position:relative; max-width:900px; margin:0 auto; }
.timeline::before {
  content:''; position:absolute; left:50%; top:0; bottom:0;
  width:1px; background:var(--border-color); transform:translateX(-50%);
}
.timeline-item {
  display:grid; grid-template-columns:1fr 60px 1fr;
  gap:1rem; margin-bottom:4rem; align-items:start;
}
.timeline-dot {
  width:12px; height:12px; background:var(--primary);
  margin:0.5rem auto 0; display:block; z-index: 2; position: relative;
}
.timeline-year { font-size:1.2rem; font-weight:900; color:var(--primary); margin-bottom:0.5rem; }
.timeline-content h3 { font-size:1.2rem; font-weight:800; margin-bottom:0.5rem; }
.timeline-content p { font-size:0.95rem; color:var(--text-light); line-height:1.7; }

/* ━━━ 특징 목록 ━━━ */
.feature-list { display:grid; grid-template-columns:repeat(2,1fr); gap:3rem; }
.feature-item { display:flex; align-items:flex-start; gap:1.5rem; padding: 2rem; border: 1px solid var(--border-color); }
.feature-icon { font-size:2.2rem; color: var(--primary); }
.feature-text h3 { font-size:1.2rem; font-weight:800; margin-bottom:0.6rem; color:var(--primary); }
.feature-text p { font-size:1rem; color:var(--text-light); line-height:1.7; }

/* ━━━ 버튼 (Editorial Style) ━━━ */
.btn-primary, .btn-secondary, .btn-outline {
  display:inline-block; padding:1.2rem 2.8rem;
  border-radius:0; font-size:1rem; font-weight:800;
  text-decoration:none; cursor:pointer; border: 2px solid var(--primary);
  transition:all 0.3s; text-transform: uppercase; letter-spacing: 0.05em;
}
.btn-primary { background:var(--primary); color:var(--text-on-primary); }
.btn-primary:hover { background: transparent; color: var(--primary); }
.btn-secondary { background:var(--accent); border-color: var(--accent); color:#fff; }
.btn-outline { background:transparent; color:var(--text-on-primary); border-color:var(--text-on-primary); }
.btn-outline:hover { background:var(--text-on-primary); color:var(--primary); }

/* ━━━ 애니메이션 ━━━ */
.fade-in-up { opacity:0; transform:translateY(30px); transition:opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.fade-in-up.visible { opacity:1; transform:translateY(0); }

/* ━━━ 푸터 ━━━ */
footer {
  background:var(--text); color:rgba(255,255,255,0.6);
  padding:5rem 0 2rem; text-align:center; width:100%;
}
footer * { text-align:center !important; }
.footer-tagline { font-size:1.5rem; color:#fff; font-weight:900; margin-bottom:1.5rem; letter-spacing: -0.02em; }
.footer-info { font-size:0.95rem; line-height:2; margin-bottom:3rem; }
.footer-copy {
  font-size:0.85rem; opacity:0.4;
  border-top:1px solid rgba(255,255,255,0.1);
  padding-top:2rem; margin-top:2rem; letter-spacing: 0.05em;
}

/* ★ 비흰색 배경(Primary)에서의 텍스트 명암비 재정의 ★ */
section.bg-primary {
    background-color: var(--primary) !important;
    color: var(--text-on-primary);
}
section.bg-primary .section-header { border-left-color: var(--accent); }
section.bg-primary .section-header h2 { color: var(--text-on-primary); }
section.bg-primary .section-header p { color: var(--text-on-primary-muted); }

@media print {
  header, .hero-prev, .hero-next, .hero-dots { display:none; }
  .hero { max-height:300px; min-height:unset; }
  body { color: #000; background: #fff; }
}

/* ── Editorial Profile Overrides ────────────────────────── */
:root { --card-radius: 6px; --btn-radius: 4px; }
.card {
  border-radius: 0;
  box-shadow: none;
  border: none;
  border-left: 4px solid var(--primary);
}
.card:hover { transform: translateX(8px); box-shadow: none; }
.card-body { padding: 1.5rem 2rem; }
.card-body h3 { font-size: 1.15rem; font-weight: 800; }
.btn-primary {
  border-radius: var(--btn-radius);
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-primary:hover { background: var(--primary); color: #fff; }
.section-header { text-align: left; }
.section-header h2 {
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.04em;
}
.section-header p { margin: 0; }
section { padding: 90px 0; border-bottom: 1px solid #f0f0f0; }
section:nth-of-type(even) { background: #fff; }
.timeline-item { margin-bottom: 2.5rem; }