/* ===== GNS SIGN Portfolio — shared base (reset, header, footer, sticky call bar) ===== */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:'Pretendard','Noto Sans KR',-apple-system,BlinkMacSystemFont,sans-serif;color:#1F2937;background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased;word-break:keep-all;overflow-wrap:break-word;}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;}
button{font-family:inherit;cursor:pointer;}
.container{max-width:1160px;margin:0 auto;padding:0 20px;}

/* ---- Header ---- */
#site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid #EEF0F2;transition:box-shadow .2s;}
#site-header.scrolled{box-shadow:0 2px 14px rgba(61,43,31,.06);}
.header-inner{max-width:1160px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px;}
.site-logo{font-weight:900;font-size:1.15rem;letter-spacing:-.02em;color:#3D2B1F;display:flex;align-items:center;gap:8px;flex-shrink:0;}
.site-logo-icon{border-radius:6px;}
.site-logo .logo-accent{color:#B5651D;}
.site-nav{display:flex;align-items:center;gap:28px;}
.site-nav a{font-size:.92rem;font-weight:600;color:#374151;}
.site-nav a:hover{color:#B5651D;}
.header-call-btn{display:flex;align-items:center;gap:6px;background:#B5651D;color:#fff;font-weight:700;font-size:.88rem;padding:9px 16px;border-radius:999px;white-space:nowrap;}
.header-call-btn:hover{background:#94511A;}
.menu-toggle{display:none;flex-direction:column;gap:4px;background:none;border:0;padding:6px;}
.menu-toggle span{width:22px;height:2px;background:#3D2B1F;border-radius:2px;transition:.2s;}
.mobile-nav{display:none;position:fixed;inset:0;top:57px;background:#fff;z-index:99;padding:24px 20px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:.2s;}
.mobile-nav.open{opacity:1;pointer-events:auto;transform:translateY(0);}
.mobile-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;}
.mobile-nav-link{display:block;padding:16px 4px;font-size:1.05rem;font-weight:700;border-bottom:1px solid #F1F5F9;}
@media(max-width:860px){
  .site-nav{display:none;}
  .menu-toggle{display:flex;}
  .mobile-nav{display:block;}
}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 28px;border-radius:10px;font-weight:700;font-size:.98rem;border:0;}
.btn-primary{background:#B5651D;color:#fff;}
.btn-primary:hover{background:#94511A;}
.btn-outline{background:#fff;color:#3D2B1F;border:1.5px solid #D1D5DB;}
.btn-outline:hover{border-color:#B5651D;color:#B5651D;}
.btn-lg{padding:18px 34px;font-size:1.05rem;border-radius:12px;}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;}

/* ---- Sticky mobile call bar ---- */
.sticky-call-bar{display:none;}
@media(max-width:640px){
  .sticky-call-bar{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:120;background:#fff;border-top:1px solid #E5E7EB;box-shadow:0 -4px 16px rgba(61,43,31,.08);}
  .sticky-call-bar a{flex:1;text-align:center;padding:14px 8px;font-weight:800;font-size:.95rem;}
  .sticky-call-bar .call-primary{background:#B5651D;color:#fff;}
  .sticky-call-bar .call-secondary{color:#3D2B1F;}
  body{padding-bottom:56px;}
}

/* ---- Footer (밝은 베이지톤) ---- */
#site-footer{background:#EFE3CC;color:#6B5A44;padding:56px 0 28px;margin-top:0;}
.footer-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:32px;padding-bottom:32px;border-bottom:1px solid rgba(61,43,31,.12);}
.footer-brand{font-weight:900;font-size:1.1rem;color:#3D2B1F;}
.footer-brand span{color:#B5651D;}
.footer-desc{margin-top:8px;font-size:.86rem;max-width:280px;}
.footer-sitemap{display:flex;gap:24px;flex-wrap:wrap;}
.footer-sitemap a{font-size:.88rem;font-weight:600;color:#6B5A44;}
.footer-sitemap a:hover{color:#B5651D;}
.footer-bottom{padding-top:22px;font-size:.82rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;}
.footer-info span{margin-right:14px;}
@media(max-width:600px){
  .footer-info{display:flex;flex-direction:column;gap:4px;}
  .footer-info span{margin-right:0;}
}
.footer-copy{color:#8A7860;}

/* ---- Shared: reveal-on-scroll ---- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease;transition-delay:calc(var(--i,0) * 70ms);}
.reveal.visible{opacity:1;transform:none;}

/* ---- Shared: lightbox ---- */
.lightbox-overlay{display:none;position:fixed;inset:0;background:rgba(61,43,31,.92);z-index:200;align-items:center;justify-content:center;padding:30px;}
.lightbox-overlay.open{display:flex;}
.lightbox-overlay img{max-width:92vw;max-height:88vh;border-radius:6px;}
.lightbox-close{position:absolute;top:20px;right:24px;background:none;border:0;color:#fff;font-size:2rem;line-height:1;}

/* ---- Shared: FAQ accordion (native details) ---- */
.faq-item{border-bottom:1px solid #E5E7EB;padding:4px 0;}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 4px;font-weight:700;display:flex;justify-content:space-between;align-items:center;gap:12px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:'+';font-size:1.3rem;font-weight:400;color:#B5651D;flex-shrink:0;}
.faq-item[open] summary::after{content:'\2212';}
.faq-item p{margin:0 4px 16px;color:#4B5563;font-size:.94rem;}

/* ---- Shared: sections ---- */
.section{padding:72px 0;}
.section-head{text-align:center;max-width:640px;margin:0 auto 40px;}
.section-eyebrow{color:#B5651D;font-weight:800;font-size:.82rem;letter-spacing:.04em;text-transform:uppercase;}
.section-title{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:900;margin:8px 0 10px;color:#3D2B1F;}
.section-desc{color:#6B7280;font-size:1rem;}

/* ---- Shared: data table ---- */
.spec-table{width:100%;border-collapse:collapse;font-size:.92rem;}
.spec-table th,.spec-table td{padding:14px 16px;border:1px solid #E5E7EB;text-align:left;}
.spec-table thead th{background:#B5651D;color:#fff;font-weight:700;}
.spec-table tbody tr:nth-child(even){background:#F8F9FA;}
.table-scroll-hint{display:none;}
@media(max-width:640px){
  .table-scroll-hint{display:flex;align-items:center;gap:4px;justify-content:flex-end;font-size:.78rem;color:#9CA3AF;margin:-6px 0 8px;}
}

/* ---- Shared: breadcrumb ---- */
.breadcrumb{font-size:.82rem;color:#9CA3AF;margin-bottom:14px;}
.breadcrumb a{color:#6B7280;}
.breadcrumb a:hover{color:#B5651D;}

/* ---- Shared: 시공사례 상세페이지(case-page) ---- */
.case-page{background:#fff;color:#4A3B2A;}
.case-hero{background:linear-gradient(160deg,#4A3B2A 0%,#5C4B37 100%);color:#fff;padding:52px 0 58px;}
.case-hero .container{text-align:left;}
.case-hero .breadcrumb{color:#A8927A;margin-bottom:16px;}
.case-hero .breadcrumb a{color:#E4D5BC;}
.case-eyebrow{color:#D9A15C;font-weight:800;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;margin:0 0 8px;}
.case-hero h1{font-size:clamp(1.6rem,3.6vw,2.3rem);font-weight:900;margin:0 0 16px;letter-spacing:-.02em;max-width:820px;line-height:1.35;}
.case-hero-lead{font-size:1rem;color:#E4D5BC;max-width:720px;line-height:1.85;margin:0 0 26px;}
.case-hero .cta-row .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.4);}
.case-hero .cta-row .btn-outline:hover{border-color:#fff;}
.case-page .section{background:#F7F0E4;}
.case-page .section:first-of-type{background:#fff;}
.case-table-wrap{overflow-x:auto;}
.case-page .spec-table{background:#fff;}
.case-page .spec-table td:first-child{font-weight:700;color:#4A3B2A;white-space:nowrap;width:170px;}
.case-gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.case-gallery-grid figure{margin:0;}
.case-gallery-grid img{width:100%;height:220px;object-fit:cover;border-radius:8px;cursor:zoom-in;display:block;}
.case-gallery-grid figcaption{margin-top:6px;font-size:.82rem;color:#6B5A44;}
@media(max-width:700px){.case-gallery-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:480px){.case-gallery-grid{grid-template-columns:1fr;}}
.case-faq-list{max-width:780px;margin:0 auto;background:#fff;border-radius:14px;padding:8px 20px;}
.case-final-cta{background:#4A3B2A;color:#fff;padding:56px 0;text-align:center;}
.case-final-cta h2{font-size:clamp(1.3rem,3vw,1.8rem);font-weight:900;margin:0 0 10px;}
.case-final-cta p{color:#E4D5BC;margin:0 0 24px;}