/* ============================================================
   brand.css — 22페이지 공용 브랜드 고정 블록
   헤더 / 히어로 구조 / CTA밴드 / 푸터 / 접근성 / 공용 유틸리티
   페이지별 색상은 p{n}.css 의 --accent/--sub/--bg/--surface/--line 로만 확장한다.
   ============================================================ */

:root{
  /* 브랜드 고정 토큰 — 기존 사이트(html.php) 실제 컬러 기준으로 치환
     (spec 4-1: 기존 값과 다르면 기존 값 우선) */
  --brand-ink:    #1b3a5b; /* 기존 --navy */
  --brand-line:   #2c4a68;
  --brand-accent: #ffd34d; /* 기존 --accent, CTA 고정색 */
  --brand-sub:    #2c5f8a; /* 기존 --blue */
  --brand-paper:  #ffffff;
  --font-fallback: 'Pretendard','Pretendard Variable','Noto Sans KR',system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--body-font,var(--font-fallback));
  color:#1f2328;
  line-height:1.75;
  background:var(--bg,#fff);
  word-break:keep-all;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,dl,dd,figure{margin:0;}
button{font:inherit;background:none;border:none;cursor:pointer;color:inherit;}
table{border-collapse:collapse;width:100%;}

.container{max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:64px 0;}
@media (max-width:640px){ .section{padding:44px 0;} }

.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--brand-accent);color:var(--brand-ink);
  padding:10px 18px;z-index:200;font-weight:700;
}
.skip-link:focus{left:12px;top:12px;}

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

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important;}
}

/* ── 헤더 (.gnb) ───────────────────────────────────────── */
.gnb{position:sticky;top:0;z-index:100;background:var(--brand-ink);border-bottom:1px solid var(--brand-line);}
.gnb-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px;max-width:1200px;margin:0 auto;}
.gnb-logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;color:#fff;flex-shrink:0;}
.gnb-logo svg{width:26px;height:26px;flex-shrink:0;}
.gnb-menu{display:flex;flex-wrap:wrap;gap:6px 20px;font-weight:600;font-size:.95rem;color:#d9e2ec;}
.gnb-menu a{padding:6px 2px;}
.gnb-menu a:hover,.gnb-menu a:focus-visible{color:var(--brand-accent);}
.gnb-dropdown{position:relative;}
.gnb-dropdown > button{display:flex;align-items:center;gap:4px;color:#d9e2ec;font-weight:600;font-size:.95rem;padding:6px 2px;}
.gnb-dropdown ul{
  display:none;position:absolute;top:calc(100% + 10px);left:0;background:#fff;color:#1f2328;
  min-width:220px;border-radius:10px;box-shadow:0 12px 30px rgba(0,0,0,.18);padding:8px;
}
.gnb-dropdown.is-open ul{display:block;}
.gnb-dropdown ul li a{display:block;padding:9px 12px;border-radius:6px;font-size:.9rem;font-weight:500;color:#1f2328;}
.gnb-dropdown ul li a:hover{background:#f1f5f9;}
.gnb-cta{display:flex;gap:8px;flex-shrink:0;}
.gnb-cta a{
  display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:30px;font-weight:700;font-size:.88rem;white-space:nowrap;
}
.gnb-cta .gnb-call{background:var(--brand-accent);color:var(--brand-ink);}
.gnb-cta .gnb-sms{background:transparent;color:#fff;border:1px solid var(--brand-line);}
.gnb-toggle{display:none;background:none;border:none;color:#fff;padding:4px;}
.gnb-toggle svg{width:26px;height:26px;}

@media (max-width:899px){
  .gnb-menu,.gnb-cta{display:none;}
  .gnb-toggle{display:block;}
  .gnb.is-open .gnb-menu{
    display:flex;flex-direction:column;gap:0;position:absolute;top:100%;left:0;right:0;
    background:var(--brand-ink);border-bottom:1px solid var(--brand-line);padding:8px 0;
  }
  .gnb.is-open .gnb-menu a{padding:13px 20px;border-top:1px solid var(--brand-line);}
  .gnb.is-open .gnb-dropdown ul{position:static;background:var(--brand-ink);box-shadow:none;margin:0 20px;}
  .gnb.is-open .gnb-dropdown ul li a{color:#d9e2ec;}
  .gnb.is-open .gnb-dropdown ul li a:hover{background:var(--brand-line);}
  .gnb.is-open .gnb-cta{
    display:flex;gap:8px;padding:14px 20px;position:absolute;top:100%;margin-top:0;
  }
}

/* ── 히어로 ────────────────────────────────────────────── */
.hero{
  position:relative;overflow:hidden;background:var(--brand-ink);color:#fff;
  padding:88px 20px 76px;text-align:center;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(135deg,var(--accent,var(--brand-accent)) 0 2px,transparent 2px 26px);
  opacity:.08;
}
.hero-inner{position:relative;max-width:840px;margin:0 auto;}
.hero-eyebrow{
  display:inline-block;font-family:var(--label-font,var(--font-fallback));font-weight:600;letter-spacing:.14em;
  font-size:.8rem;text-transform:uppercase;color:var(--accent,var(--brand-accent));margin-bottom:16px;
}
.hero h1{
  font-family:var(--display-font,var(--font-fallback));font-weight:800;font-size:clamp(2rem,4.2vw,3.1rem);
  line-height:1.3;margin-bottom:18px;
}
.hero-sub{font-size:1.05rem;color:#dbe4ee;line-height:1.8;margin-bottom:30px;}
.hero-cta{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:36px;}
.hero-chips{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;}
.chip{
  display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  border-radius:30px;padding:8px 16px;font-size:.85rem;color:#eef2f6;
}
.chip svg{width:15px;height:15px;flex-shrink:0;color:var(--accent,var(--brand-accent));}

/* ── 버튼 ──────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:30px;font-weight:700;font-size:.98rem;}
.btn svg{width:18px;height:18px;}
.btn-primary{background:var(--brand-accent);color:var(--brand-ink);}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7);}

/* ── CTA 밴드 ─────────────────────────────────────────── */
.cta-band{background:var(--brand-ink);color:#fff;padding:44px 20px;text-align:center;}
.cta-band h2{font-size:1.4rem;font-weight:700;margin-bottom:8px;}
.cta-band p{color:#c9d4e0;margin-bottom:22px;font-size:.95rem;}
.cta-band .hero-cta{margin-bottom:0;}

@media (max-width:899px){
  body{padding-bottom:62px;}
  .cta-fixed{
    position:fixed;left:0;right:0;bottom:0;z-index:90;display:flex;
    box-shadow:0 -4px 16px rgba(0,0,0,.12);
  }
  .cta-fixed a{
    flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:15px 10px;font-weight:700;font-size:.92rem;
  }
  .cta-fixed .cf-call{background:var(--brand-accent);color:var(--brand-ink);}
  .cta-fixed .cf-sms{background:var(--brand-ink);color:#fff;}
}

/* ── 본문 공용 ─────────────────────────────────────────── */
.section-head{max-width:760px;margin:0 auto 34px;text-align:center;}
.section-eyebrow{font-weight:700;color:var(--accent,#555);font-size:.85rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px;}
.section-head h2{font-family:var(--display-font,var(--font-fallback));font-size:clamp(1.5rem,2.6vw,2rem);font-weight:800;color:#1f2328;line-height:1.4;}
.lead{font-size:1rem;color:#3c434a;margin-bottom:14px;}
.note{font-size:.88rem;color:#5b6470;margin-top:10px;}
.note::before{content:"※ ";}

.surface-card{background:var(--surface,#fff);border:1px solid var(--line,#e6e6e6);border-radius:14px;padding:26px;}

.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line,#e2e2e2);border-radius:10px;}
.table-wrap table{min-width:520px;}
.table-wrap caption{text-align:left;font-weight:700;padding:14px 16px 0;font-size:.95rem;color:#1f2328;}
.table-wrap th,.table-wrap td{padding:12px 16px;text-align:left;font-size:.92rem;border-bottom:1px solid var(--line,#eee);}
.table-wrap thead th{background:var(--surface,#f7f7f7);color:#1f2328;font-weight:700;}
.table-wrap tbody tr:last-child td{border-bottom:none;}
.table-hint{font-size:.78rem;color:#5b6470;margin:6px 2px 0;}

/* ── 시공사진 세트(향후 사진 투입용, 8-2 규격) ───────────── */
.ba-set{max-width:940px;margin:0 auto;}
.ba-grid{display:grid;gap:14px;}
.ba-grid.ba-3{grid-template-columns:repeat(3,1fr);}
.ba-grid.ba-2{grid-template-columns:repeat(2,1fr);}
@media (max-width:640px){ .ba-grid.ba-3,.ba-grid.ba-2{grid-template-columns:1fr;} }
.ba-item{position:relative;border-radius:10px;overflow:hidden;background:var(--surface,#f2f2f2);aspect-ratio:4/3;}
.ba-item img{width:100%;height:100%;object-fit:cover;display:block;cursor:zoom-in;}
.ba-tag{
  position:absolute;top:10px;left:10px;z-index:2;background:var(--accent,var(--brand-accent));color:#fff;
  font-size:.78rem;font-weight:700;padding:5px 12px;border-radius:20px;
}
.ba-set figcaption{text-align:center;color:#6b7480;font-size:.88rem;margin-top:12px;}

/* ── FAQ ───────────────────────────────────────────────── */
.faq-list details{border-bottom:1px solid var(--line,#e6e6e6);padding:16px 0;}
.faq-list summary{
  cursor:pointer;font-weight:700;font-size:1rem;color:#1f2328;list-style:none;
  display:flex;justify-content:space-between;gap:16px;align-items:center;
}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-list summary::after{content:"+";font-size:1.3rem;color:var(--accent,var(--brand-accent));flex-shrink:0;}
.faq-list details[open] summary::after{content:"−";}
.faq-list .faq-a{margin-top:12px;color:#454c54;font-size:.94rem;line-height:1.8;}

/* ── 문의유형 카드 ────────────────────────────────────── */
.inquiry-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;}
.inquiry-card{background:var(--surface,#fff);border:1px solid var(--line,#e6e6e6);border-radius:12px;padding:22px;}
.inquiry-card svg{width:24px;height:24px;color:var(--accent,var(--brand-accent));margin-bottom:12px;}
.inquiry-card h3{font-size:1rem;font-weight:700;margin-bottom:8px;color:#1f2328;}
.inquiry-card p{font-size:.9rem;color:#5a626b;}

/* ── 탭(12번 페이지 등 사용) ─────────────────────────────── */
.tabs [role="tablist"]{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px;}
.tabs [role="tab"]{padding:10px 18px;border-radius:30px;border:1px solid var(--line,#ddd);font-weight:600;font-size:.9rem;color:#555;}
.tabs [role="tab"][aria-selected="true"]{background:var(--accent,var(--brand-accent));color:#fff;border-color:transparent;}
.tabs [role="tabpanel"]{display:none;}
.tabs [role="tabpanel"].is-active{display:block;}

/* ── 관련 페이지 링크 ─────────────────────────────────── */
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;}
.related-card{display:block;background:var(--surface,#fff);border:1px solid var(--line,#e6e6e6);border-radius:12px;padding:18px 20px;font-weight:700;color:#1f2328;}
.related-card span{display:block;font-size:.82rem;font-weight:500;color:#6b7480;margin-top:4px;}

/* ── 스크롤 리빌 ──────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-visible{opacity:1;transform:none;}

/* ── 사례 필터칩(22번) ───────────────────────────────── */
.filter-chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px;}
.filter-chips button{padding:8px 16px;border-radius:20px;border:1px solid var(--line,#ddd);font-size:.85rem;font-weight:600;color:#555;}
.filter-chips button[aria-pressed="true"]{background:var(--accent,var(--brand-accent));color:#fff;border-color:transparent;}

/* ── 갤러리 메이슨리(21번) ───────────────────────────── */
.masonry{columns:3 220px;column-gap:14px;}
.masonry .ba-item{margin-bottom:14px;break-inside:avoid;aspect-ratio:auto;}
@media (max-width:640px){ .masonry{columns:2 160px;} }

/* ── 순환/방사 도식 공용 ─────────────────────────────── */
.diagram-wrap{max-width:760px;margin:0 auto;text-align:center;}
.diagram-wrap svg{width:100%;height:auto;}
.diagram-caption{margin-top:14px;font-size:.9rem;color:#5a626b;}

/* ── 푸터 ─────────────────────────────────────────────── */
.site-footer{background:var(--brand-ink);color:#c9d4e0;padding:56px 20px 30px;font-size:.9rem;}
.footer-intro{max-width:640px;margin-bottom:34px;line-height:1.85;color:#d9e2ec;}
.footer-biz{list-style:none;padding:0;margin:0 0 40px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px 24px;border-top:1px solid var(--brand-line);border-bottom:1px solid var(--brand-line);padding:20px 0;}
.footer-biz div{display:flex;gap:8px;}
.footer-biz dt{color:#9fb2c7;flex-shrink:0;min-width:64px;}
.footer-biz dd{margin:0;color:#e6ecf2;}
.footer-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:22px;margin-bottom:34px;}
.footer-links h3{color:#9fb2c7;font-size:.82rem;font-weight:700;margin-bottom:10px;letter-spacing:.03em;}
.footer-links a{display:block;color:#c9d4e0;padding:4px 0;font-size:.86rem;}
.footer-links a:hover{color:var(--brand-accent);}
.footer-disclaimer{border-top:1px solid var(--brand-line);padding-top:20px;color:#8fa3ba;font-size:.78rem;line-height:1.9;}
.footer-copy{margin-top:16px;color:#9fb2c7;font-size:.78rem;}