/* ═══ 디자인 시스템 ═══
   Primary 컬러: 파스텔 스틸블루 #A0C4D8 (파스텔 팔레트 10종 중 선정)
   Hero 타입: hero-grid (실사진 그리드형)
   섹션 순서: 패턴 A — 신뢰 우선형
   카드 그리드: grid-3
   섹션 레이블: label-number (01 — Portfolio)
   버튼 형태: btn-square
   ═══════════════════════ */

:root {
  --primary: #A0C4D8;
  --primary-dark: #6E9CB8;
  --text: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --bg-alt: #F7F8F9;
  --card-radius: 1rem;
  --btn-radius: 6px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Pretendard", "Noto Sans KR", -apple-system, sans-serif;
  font-weight: 400;
  color: var(--text);
  word-break: keep-all;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-weight: 800; margin: 0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 5rem 0; }
.section-alt { background: var(--bg-alt); }

/* 섹션 레이블: label-number */
.section-label {
  display: flex; align-items: baseline; gap: 0.5rem;
  font-size: 0.75rem; font-weight: 700; color: var(--primary-dark);
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.75rem;
}
.section-label::after { content: ""; flex: 1; height: 1px; background: var(--border); margin-left: 0.5rem; }
.section-title { font-size: 1.75rem; margin-bottom: 0.5rem; }
.section-sub { color: var(--text-muted); font-weight: 300; margin-top: 0.5rem; }

/* 버튼: btn-square */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  border-radius: var(--btn-radius); padding: 0.85rem 1.75rem;
  font-weight: 700; font-size: 0.95rem; text-decoration: none;
  border: 2px solid transparent; cursor: pointer; transition: all 0.2s ease;
}
.btn-primary { background: var(--primary-dark); color: #fff; }
.btn-primary:hover { background: #5A87A0; }
.btn-outline { background: #fff; color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: var(--primary-dark); }
.btn-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 4.25rem; }
.logo { font-weight: 800; font-size: 1.15rem; text-decoration: none; color: var(--text); }
.nav-menu { display: flex; gap: 1.75rem; list-style: none; margin: 0; padding: 0; }
.nav-menu a { text-decoration: none; font-weight: 600; font-size: 0.92rem; color: var(--text); }
.nav-menu a:hover { color: var(--primary-dark); }
.header-cta { display: flex; align-items: center; gap: 1rem; }
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; }
@media (max-width: 768px) {
  .nav-menu { position: fixed; top: 4.25rem; left: 0; right: 0; background: #fff; flex-direction: column;
    padding: 1.25rem; gap: 1rem; border-bottom: 1px solid var(--border); display: none; }
  .nav-menu.open { display: flex; }
  .hamburger { display: block; }
  .header-cta .btn-label { display: none; }
}

/* Hero (hero-grid) */
.hero { padding: 3.5rem 0 4.5rem; }
.hero .container { display: grid; grid-template-columns: 1.1fr 1fr; gap: 3rem; align-items: center; }
.hero-badge { display: inline-block; font-size: 0.78rem; font-weight: 700; color: var(--primary-dark);
  background: #EAF2F6; padding: 0.3rem 0.8rem; border-radius: 4px; margin-bottom: 1rem; }
.hero h1 { font-size: 2.3rem; line-height: 1.35; }
.hero-desc { margin-top: 1rem; color: var(--text-muted); font-size: 1.02rem; }
.hero-stats { display: flex; gap: 1.5rem; margin: 1.75rem 0; flex-wrap: wrap; }
.hero-stat strong { display: block; font-size: 1.3rem; font-weight: 800; }
.hero-stat span { font-size: 0.8rem; color: var(--text-muted); }
.hero-grid-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.hero-grid-imgs img { border-radius: var(--card-radius); aspect-ratio: 4/3; object-fit: cover; }
.hero-grid-imgs .tall { grid-row: span 2; aspect-ratio: 2/3; }
@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
}

/* Portfolio grid (grid-3) */
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 1024px) { .portfolio-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .portfolio-grid { grid-template-columns: 1fr; } }
.portfolio-card {
  border: 1px solid var(--border); border-radius: var(--card-radius); overflow: hidden;
  transition: all 0.25s ease; text-decoration: none; display: block; background: #fff;
}
.portfolio-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.12); border-color: var(--primary); }
.card-thumb { aspect-ratio: 4/3; overflow: hidden; }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.portfolio-card:hover .card-thumb img { transform: scale(1.05); }
.card-body { padding: 1.25rem; display: flex; flex-direction: column; gap: 0.4rem; }
.card-badge {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.05em;
  background: var(--primary-dark); color: #fff; display: inline-block;
  padding: 0.2rem 0.6rem; border-radius: 4px; align-self: flex-start;
}
.card-title { font-weight: 800; font-size: 1rem; }
.card-sub { font-weight: 400; font-size: 0.85rem; color: var(--text-muted); }
.card-more { font-size: 0.85rem; font-weight: 700; color: var(--text-muted); margin-top: 0.25rem; }
.portfolio-card:hover .card-more { color: var(--primary-dark); }

/* Services */
.service-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; }
@media (max-width: 1024px) { .service-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .service-grid { grid-template-columns: repeat(2, 1fr); } }
.service-card { border: 1px solid var(--border); border-radius: var(--card-radius); overflow: hidden; text-decoration: none; background: #fff; }
.service-card .thumb { aspect-ratio: 3/4; overflow: hidden; background: var(--bg-alt); }
.service-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.service-card .body { padding: 1rem; }
.service-card .eng { font-size: 0.65rem; font-weight: 700; color: var(--primary-dark); letter-spacing: 0.06em; }
.service-card h3 { font-size: 0.98rem; margin-top: 0.2rem; }
.service-card p { font-size: 0.82rem; color: var(--text-muted); margin: 0.4rem 0 0.6rem; }
.service-card .more { font-size: 0.82rem; font-weight: 700; }

/* Process */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
@media (max-width: 768px) { .process-steps { grid-template-columns: 1fr; } }
.process-step { text-align: left; padding: 1.5rem; border: 1px solid var(--border); border-radius: var(--card-radius); background: #fff; }
.step-num { font-size: 1.6rem; font-weight: 800; color: var(--primary-dark); }
.process-step h3 { font-size: 1rem; margin: 0.5rem 0 0.4rem; }
.process-step p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 3rem; align-items: center; }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; } }
.about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.fact-box { border: 1px solid var(--border); border-radius: var(--card-radius); padding: 1.25rem; background: #fff; }
.fact-box strong { display: block; font-size: 1.2rem; }
.fact-box span { font-size: 0.8rem; color: var(--text-muted); }

/* Areas */
.area-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
@media (max-width: 768px) { .area-grid { grid-template-columns: 1fr; } }
.area-card { border: 1px solid var(--border); border-radius: var(--card-radius); padding: 1.5rem; background: #fff; }
.area-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.area-card p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q { width: 100%; text-align: left; background: none; border: none; padding: 1.25rem 0;
  font-size: 1rem; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.faq-q .icon { font-size: 1.1rem; font-weight: 400; transition: transform 0.2s ease; }
.faq-item.open .faq-q .icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.25s ease; }
.faq-item.open .faq-a { max-height: 20rem; }
.faq-a p { padding: 0 0 1.25rem; margin: 0; color: var(--text-muted); font-size: 0.92rem; }

/* CTA */
.cta-section { background: var(--text); color: #fff; text-align: center; padding: 4rem 0; }
.cta-section h2 { font-size: 1.6rem; color: #fff; }
.cta-badges { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; margin: 1.5rem 0 2rem; }
.cta-badge { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; color: #D1D5DB; }
.cta-section .btn-row { justify-content: center; }
.cta-section .btn-outline { background: transparent; color: #fff; border-color: #4B5563; }

/* Footer */
.site-footer { background: #14181C; color: #9CA3AF; padding: 3.5rem 0 2rem; font-size: 0.85rem; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 2.5rem; margin-bottom: 2rem; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 { color: #fff; font-size: 0.9rem; margin-bottom: 0.9rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.55rem; }
.footer-grid a { text-decoration: none; color: #9CA3AF; }
.footer-grid a:hover { color: #fff; }
.footer-biz { border-top: 1px solid #262B31; padding-top: 1.5rem; line-height: 1.9; }

/* Floating buttons */
.floating-btns { position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 90; display: flex; flex-direction: column; gap: 0.6rem; }
.floating-btn {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.8rem 1.1rem;
  border-radius: var(--btn-radius); text-decoration: none; font-weight: 700; font-size: 0.88rem;
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}
.floating-btn.call { background: var(--primary-dark); color: #fff; }
.floating-btn.sms { background: #fff; color: var(--text); border: 1px solid var(--border); }

/* Breadcrumb / back link */
.back-link { display: inline-flex; align-items: center; gap: 0.3rem; font-size: 0.88rem; font-weight: 700; color: #fff; text-decoration: none; opacity: 0.9; }

/* Detail hero */
.detail-hero { position: relative; padding: 6rem 0 3rem; color: #fff; background-size: cover; background-position: center; }
.detail-hero::before { content: ""; position: absolute; inset: 0; background: rgba(0,0,0,0.5); }
.detail-hero .container { position: relative; z-index: 1; }
.detail-hero h1 { font-size: 1.9rem; text-shadow: 0 2px 12px rgba(0,0,0,0.4); }
.detail-hero .loc { margin-top: 0.6rem; font-size: 0.95rem; opacity: 0.95; }

.info-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--card-radius); overflow: hidden; margin-top: -2.5rem; position: relative; z-index: 2; }
@media (max-width: 768px) { .info-bar { grid-template-columns: repeat(2, 1fr); } }
.info-bar div { background: #fff; padding: 1.25rem; text-align: center; }
.info-bar span { display: block; font-size: 0.78rem; color: var(--text-muted); margin-bottom: 0.3rem; }
.info-bar strong { font-size: 0.98rem; }

.content-block { max-width: 780px; margin: 0 auto; }
.content-block p { margin: 0 0 1.1rem; color: var(--text); }
.content-block h2 { font-size: 1.35rem; margin: 2.5rem 0 1rem; }

.ba-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 768px) { .ba-grid { grid-template-columns: 1fr; } }
.ba-col img { border-radius: var(--card-radius); aspect-ratio: 4/3; object-fit: cover; margin-bottom: 1rem; }
.ba-col h3 { font-size: 1.05rem; margin-bottom: 0.6rem; }
.ba-col p { font-size: 0.92rem; color: var(--text-muted); }

.summary-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.7rem; }
.summary-list li { padding-left: 1.5rem; position: relative; font-size: 0.95rem; }
.summary-list li::before { content: "—"; position: absolute; left: 0; color: var(--primary-dark); }

.quote-block { border-left: 3px solid var(--primary-dark); padding: 0.5rem 0 0.5rem 1.5rem; margin: 2rem 0; font-size: 1rem; color: var(--text); }
.quote-block .sign { display: block; margin-top: 0.8rem; font-size: 0.85rem; color: var(--text-muted); font-weight: 700; }

.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
@media (max-width: 640px) { .related-grid { grid-template-columns: 1fr; } }