/* =========================================================
   씨앤씨공조 — style.css
   디자인: 정밀 엔지니어링 / 프리미엄 · LG 헤리티지 레드 액센트
   ========================================================= */

:root{
  --ink:        #16181d;
  --ink-2:      #4a4e57;
  --ink-3:      #8b8f98;
  --paper:      #ffffff;
  --surface:    #f5f4f1;
  --surface-2:  #ebe9e3;
  --line:       rgba(22,24,29,.12);
  --line-2:     rgba(22,24,29,.22);
  --brand:      #a50034;
  --brand-dark: #7d0027;
  --brand-soft: #fbeef2;
  --radius:     10px;
  --radius-lg:  16px;
  --ease:       cubic-bezier(.22,.61,.36,1);
  --maxw:       1180px;
  --pad:        clamp(20px, 5vw, 48px);
  --font:       "Pretendard Variable", Pretendard, -apple-system, sans-serif;
  --mono:       "IBM Plex Mono", ui-monospace, monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--paper);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
em{font-style:normal;color:var(--brand)}

.container{max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}

/* ---------- 공통 타이포 ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12px;font-weight:500;letter-spacing:.18em;
  text-transform:uppercase;color:var(--brand);
  display:inline-block;margin-bottom:18px;
}
.eyebrow-light{color:#e8a9bb}
.section-title{
  font-size:clamp(28px,4.2vw,46px);font-weight:700;letter-spacing:-.02em;line-height:1.15;
}
.section-desc{
  margin-top:18px;max-width:560px;color:var(--ink-2);font-size:clamp(15px,1.6vw,17px);
}
.section{padding:clamp(64px,9vw,120px) 0}
.section-head{margin-bottom:clamp(36px,5vw,56px)}
.section-foot{margin-top:44px;text-align:center}

/* ---------- 버튼 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  font-family:var(--font);font-weight:600;font-size:15px;
  padding:13px 24px;border-radius:100px;border:1px solid transparent;
  cursor:pointer;transition:.25s var(--ease);white-space:nowrap;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-lg{padding:16px 32px;font-size:16px}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark);transform:translateY(-2px)}
.btn-outline{border-color:var(--line-2);color:var(--ink)}
.btn-outline:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn-outline-light{border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline-light:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-ghost{color:var(--ink-2)}
.btn-ghost:hover{color:var(--brand)}

/* ---------- 헤더 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.3s var(--ease);
}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:18px var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{font-weight:800;font-size:21px;letter-spacing:-.02em;color:#fff;transition:color .3s}
.logo-badge{
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;
  color:#fff;border:1px solid rgba(255,255,255,.45);
  padding:3px 8px;border-radius:4px;transition:.3s;
}
.gnb{display:flex;gap:34px}
.gnb a{font-size:15px;font-weight:500;color:rgba(255,255,255,.85);transition:.2s;position:relative}
.gnb a:hover{color:#fff}
.gnb a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--brand);transition:width .25s var(--ease)}
.gnb a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:10px}
.header-actions .btn-ghost{color:rgba(255,255,255,.85)}
.header-actions .btn-ghost:hover{color:#fff}

/* 스크롤 후 흰 헤더 */
.site-header.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.site-header.scrolled .logo-mark{color:var(--ink)}
.site-header.scrolled .logo-badge{color:var(--brand);border-color:var(--brand)}
.site-header.scrolled .gnb a{color:var(--ink-2)}
.site-header.scrolled .gnb a:hover{color:var(--ink)}
.site-header.scrolled .header-actions .btn-ghost{color:var(--ink-2)}
.site-header.scrolled .header-actions .btn-ghost:hover{color:var(--brand)}

/* 모바일 토글 */
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:#fff;transition:.3s;border-radius:2px}
.site-header.scrolled .nav-toggle span{background:var(--ink)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 모바일 메뉴 */
.mobile-menu{
  position:fixed;inset:0 0 0 auto;width:min(82vw,360px);z-index:99;
  background:var(--paper);padding:96px 32px 32px;
  display:flex;flex-direction:column;gap:4px;
  transform:translateX(100%);transition:.35s var(--ease);box-shadow:-20px 0 60px rgba(0,0,0,.15);
}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu a{font-size:18px;font-weight:600;padding:14px 0;border-bottom:1px solid var(--line)}
.mobile-menu-actions{margin-top:24px;display:flex;flex-direction:column;gap:10px}
.mobile-menu-actions .btn{width:100%}

/* ---------- 히어로 ---------- */
.hero{
  position:relative;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:120px var(--pad) 80px;color:#fff;overflow:hidden;background:#13151a;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    linear-gradient(180deg, rgba(16,18,23,.78), rgba(16,18,23,.92)),
    radial-gradient(circle at 70% 30%, #232730, #13151a 60%);
}
/* 블루프린트 그리드 (HVAC 엔지니어링 무드) */
.hero-bg::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:48px 48px;
}
.hero-content{max-width:var(--maxw);margin:0 auto;width:100%;position:relative;z-index:1}
.hero-title{font-size:clamp(38px,6.5vw,78px);font-weight:800;letter-spacing:-.03em;line-height:1.05}
.hero-sub{margin-top:26px;font-size:clamp(16px,2vw,20px);color:rgba(255,255,255,.82);max-width:520px}
.hero-actions{margin-top:40px;display:flex;flex-wrap:wrap;gap:14px}
.hero-scroll{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);z-index:1;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:rgba(255,255,255,.6);
  display:flex;flex-direction:column;align-items:center;gap:10px;
}
.hero-scroll span{width:1px;height:40px;background:rgba(255,255,255,.4);animation:scrolldot 1.8s var(--ease) infinite}
@keyframes scrolldot{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}50.1%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- 신뢰 배지 ---------- */
.trust{background:var(--ink);color:#fff;padding:0}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-item{
  padding:40px 24px;text-align:center;border-right:1px solid rgba(255,255,255,.1);
  display:flex;flex-direction:column;gap:8px;
}
.trust-item:last-child{border-right:none}
.trust-num{font-size:30px;font-weight:800;color:#fff;letter-spacing:-.02em}
.trust-label{font-size:14px;color:rgba(255,255,255,.6)}

/* ---------- 자리표시 블록 (이미지 들어갈 곳) ---------- */
.ph{
  position:relative;background:var(--surface);border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-3);font-family:var(--mono);font-size:13px;letter-spacing:.05em;
  border:1px solid var(--line);overflow:hidden;
}
.ph::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(135deg,transparent 48%,var(--line) 49%,var(--line) 51%,transparent 52%);
  background-size:18px 18px;
}
.ph span{position:relative;z-index:1}
.ph-photo{aspect-ratio:4/3}
.ph-product{aspect-ratio:1/1}
.ph-wide{aspect-ratio:3/4}
.ph-video{aspect-ratio:16/9}
.ph-thumb{width:96px;height:60px;flex:0 0 auto}

/* ---------- 시공 사례 ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.gallery-card{display:block;transition:.3s var(--ease)}
.gallery-card .ph{transition:.4s var(--ease)}
.gallery-card:hover .ph{transform:scale(1.02);box-shadow:0 18px 40px rgba(0,0,0,.12)}
.gallery-meta{padding-top:16px}
.gallery-meta .tag{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--brand);text-transform:uppercase}
.gallery-meta h3{font-size:18px;font-weight:600;margin-top:6px;letter-spacing:-.01em}

/* ---------- 자리표시 패널 (견적 등 미구현) ---------- */
.estimate-section{background:var(--surface)}
.placeholder-panel{
  background:var(--paper);border:1px dashed var(--line-2);border-radius:var(--radius-lg);
  padding:64px 32px;text-align:center;
}
.placeholder-icon{font-style:normal;font-size:36px;color:var(--brand);opacity:.5;display:block;margin-bottom:16px}
.placeholder-title{font-size:20px;font-weight:700}
.placeholder-note{margin-top:8px;font-family:var(--mono);font-size:13px;color:var(--ink-3)}

/* ---------- 제품 ---------- */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:18px;transition:.3s var(--ease);
}
.product-card:hover{border-color:var(--line-2);transform:translateY(-4px)}
.product-card .ph{margin-bottom:18px}
.product-card h3{font-size:17px;font-weight:600}
.product-card p{font-size:14px;color:var(--ink-2);margin-top:2px}
.card-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand)}

/* ---------- 솔루션 ---------- */
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.solution-card{position:relative;border-radius:var(--radius-lg);overflow:hidden}
.solution-card .ph{border-radius:var(--radius-lg)}
.solution-card .ph::after{opacity:.35}
.solution-label{position:absolute;left:0;right:0;bottom:0;padding:24px;background:linear-gradient(transparent,rgba(0,0,0,.55));color:#fff}
.solution-label .eyebrow{color:#e8a9bb;margin-bottom:4px}
.solution-label h3{font-size:22px;font-weight:700;color:#fff}

/* ---------- 비교표 ---------- */
.compare{background:var(--surface)}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.compare-col{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px}
.compare-us{border-color:var(--brand);box-shadow:0 12px 40px rgba(165,0,52,.08)}
.compare-head{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;padding-bottom:20px;margin-bottom:20px;border-bottom:1px solid var(--line)}
.compare-badge{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.06em;background:var(--brand-soft);color:var(--brand);padding:3px 9px;border-radius:5px}
.compare-them .compare-head{color:var(--ink-3)}
.compare-col ul{list-style:none;display:flex;flex-direction:column;gap:14px}
.compare-col li{display:flex;align-items:flex-start;gap:12px;font-size:15px}
.compare-them li{color:var(--ink-3)}
.ic-ok,.ic-no{flex:0 0 auto;width:22px;height:22px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.ic-ok{background:var(--brand);color:#fff}
.ic-no{background:var(--surface-2);color:var(--ink-3)}

/* ---------- 미디어 ---------- */
.media-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:24px}
.media-list{display:flex;flex-direction:column;gap:12px}
.media-item{display:flex;align-items:center;gap:14px;padding:10px;border-radius:var(--radius);transition:.2s;border:1px solid transparent}
.media-item:hover{background:var(--surface);border-color:var(--line)}
.media-title{font-size:15px;font-weight:500}

/* ---------- 후기 ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px}
.review-card .stars{color:var(--brand);letter-spacing:2px;font-size:15px}
.review-card p{margin:16px 0;font-size:15px;color:var(--ink-2);line-height:1.7}
.review-card cite{font-style:normal;font-family:var(--mono);font-size:12px;letter-spacing:.05em;color:var(--ink-3)}

/* ---------- 최종 CTA ---------- */
.cta{background:var(--ink);color:#fff;padding:clamp(72px,10vw,128px) 0;text-align:center}
.cta-inner h2{font-size:clamp(28px,4.5vw,48px);font-weight:800;letter-spacing:-.02em;line-height:1.15}
.cta-inner p{margin:18px 0 32px;color:rgba(255,255,255,.7);font-size:17px}

/* ---------- 푸터 ---------- */
.site-footer{background:#0f1115;color:rgba(255,255,255,.7);padding:72px 0 0}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);display:grid;grid-template-columns:1fr 1.6fr;gap:48px}
.footer-logo{font-size:22px;font-weight:800;color:#fff;letter-spacing:-.02em}
.footer-tagline{margin-top:8px;font-size:14px}
.footer-social{margin-top:20px;display:flex;flex-wrap:wrap;gap:18px}
.footer-social a{font-family:var(--mono);font-size:13px;color:rgba(255,255,255,.6);transition:.2s}
.footer-social a:hover{color:#fff}
.footer-info dl{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 32px}
.footer-info dt{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:rgba(255,255,255,.4);text-transform:uppercase}
.footer-info dd{font-size:14px;color:rgba(255,255,255,.85);margin-top:3px}
.footer-info a{color:inherit}
.footer-bottom{
  max-width:var(--maxw);margin:48px auto 0;padding:24px var(--pad);
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-policy{display:flex;gap:10px;align-items:center;font-size:14px}
.footer-policy a:hover{color:#fff}
.footer-copy{font-family:var(--mono);font-size:12px;color:rgba(255,255,255,.4)}

/* ---------- 하단 고정 퀵바 ---------- */
.quickbar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:var(--paper);border-top:1px solid var(--line);
  padding:12px var(--pad);display:none;align-items:center;justify-content:space-between;gap:14px;
  transform:translateY(100%);transition:.35s var(--ease);box-shadow:0 -6px 24px rgba(0,0,0,.08);
}
.quickbar.show{transform:translateY(0)}
.quickbar-tel{display:flex;flex-direction:column;line-height:1.2}
.qb-label{font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--ink-3);text-transform:uppercase}
.qb-num{font-size:20px;font-weight:800;color:var(--ink)}
.quickbar-cta{flex:0 0 auto}

/* ---------- 스크롤 등장 애니메이션 (JS 실패 시 그냥 보이도록 안전화) ---------- */
.reveal{transition:.7s var(--ease)}
.js-reveal .reveal{opacity:0;transform:translateY(28px)}
.js-reveal .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js-reveal .reveal{opacity:1;transform:none;transition:none}
  .hero-scroll span{animation:none}
}

/* =========================================================
   반응형
   ========================================================= */
@media (max-width:980px){
  .gnb,.header-actions .btn{display:none}
  .nav-toggle{display:flex}
  .media-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:36px}
}
@media (max-width:760px){
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .trust-item:nth-child(2){border-right:none}
  .gallery-grid,.product-grid,.solution-grid,.review-grid{grid-template-columns:1fr}
  .compare-grid{grid-template-columns:1fr}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .quickbar{display:flex}
  body{padding-bottom:72px}
  .footer-info dl{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* =========================================================
   서브페이지 공통
   ========================================================= */
body:not(.home) .site-header{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
body:not(.home) .logo-mark{color:var(--ink)}
body:not(.home) .logo-badge{color:var(--brand);border-color:var(--brand)}
body:not(.home) .gnb a{color:var(--ink-2)}
body:not(.home) .gnb a:hover{color:var(--ink)}
body:not(.home) .header-actions .btn-ghost{color:var(--ink-2)}
body:not(.home) .nav-toggle span{background:var(--ink)}
body:not(.home) main{padding-top:84px}
.subpage-hero{padding:clamp(48px,7vw,88px) 0 0;text-align:center}
.subpage-hero .section-title{max-width:760px;margin:0 auto}
.subpage-hero .section-desc{margin-inline:auto}

/* =========================================================
   견적 시뮬레이터
   ========================================================= */
.estimator{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
}
.est-controls{padding:clamp(28px,4vw,44px);border-right:1px solid var(--line)}
.est-field + .est-field{margin-top:28px}
.est-label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:12px}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg button{
  font-family:var(--font);font-size:14px;font-weight:500;color:var(--ink-2);
  padding:10px 16px;border:1px solid var(--line-2);border-radius:100px;
  background:var(--paper);cursor:pointer;transition:.2s var(--ease);
}
.seg button:hover{border-color:var(--ink);color:var(--ink)}
.seg button.active{background:var(--brand);border-color:var(--brand);color:#fff}

.est-result{padding:clamp(28px,4vw,44px);background:var(--surface);display:flex;flex-direction:column}
.est-summary{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--ink-3);margin-bottom:18px}
.est-row + .est-row{margin-top:20px}
.est-tag{
  display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--brand);margin-bottom:6px;
}
.est-config{font-size:16px;line-height:1.55;color:var(--ink-2)}
.est-config strong{color:var(--ink);font-weight:700}
.est-price{font-size:clamp(24px,3.4vw,34px);font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.est-tilde{color:var(--ink-3);font-weight:400;margin:0 2px}
.est-note{margin-top:18px;font-size:13px;color:var(--ink-3);line-height:1.55}
.est-actions{margin-top:auto;padding-top:24px;display:flex;flex-wrap:wrap;gap:10px}
.est-actions .btn{flex:1;min-width:160px}

@media (max-width:760px){
  .estimator{grid-template-columns:1fr}
  .est-controls{border-right:none;border-bottom:1px solid var(--line)}
}

/* =========================================================
   상담 폼 / 알림
   ========================================================= */
.consult-wrap{max-width:620px;margin:0 auto}
.alert{padding:18px 22px;border-radius:var(--radius);margin-bottom:24px;font-size:15px;line-height:1.6}
.alert-ok{background:var(--brand-soft);color:var(--brand-dark);border:1px solid rgba(165,0,52,.2)}
.alert-err{background:#fff4f4;color:#b3261e;border:1px solid rgba(179,38,30,.25)}
.consult-form{display:flex;flex-direction:column;gap:22px}
.form-row{display:flex;flex-direction:column;gap:8px}
.form-label{font-size:14px;font-weight:600;color:var(--ink)}
.form-label .req{color:var(--brand)}
.form-label .opt{color:var(--ink-3);font-weight:400;font-size:13px}
.consult-form input[type=text],
.consult-form input[type=tel],
.consult-form textarea{
  font-family:var(--font);font-size:16px;color:var(--ink);
  padding:14px 16px;border:1px solid var(--line-2);border-radius:var(--radius);
  background:var(--paper);transition:.2s var(--ease);width:100%;
}
.consult-form input:focus,.consult-form textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);
}
.consult-form textarea{resize:vertical;min-height:110px;line-height:1.6}
.form-agree{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-2);cursor:pointer}
.form-agree input{margin-top:3px;width:17px;height:17px;accent-color:var(--brand);flex:0 0 auto}
.form-agree a{color:var(--brand);text-decoration:underline}
.form-submit{margin-top:4px}
/* 허니팟 (사람 눈에 안 보임) */
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* =========================================================
   시공 사례 갤러리 (공개 페이지)
   ========================================================= */
.gallery-img{aspect-ratio:4/3;border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.gallery-img img{width:100%;height:100%;object-fit:cover;display:block;transition:.4s var(--ease)}
.gallery-card:hover .gallery-img img{transform:scale(1.04)}
.gallery-summary{margin-top:6px;font-size:14px;color:var(--ink-2)}
.gal-filter{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px}
.gal-filter a{
  font-size:14px;font-weight:500;color:var(--ink-2);padding:9px 18px;
  border:1px solid var(--line-2);border-radius:100px;transition:.2s var(--ease);
}
.gal-filter a:hover{border-color:var(--ink);color:var(--ink)}
.gal-filter a.on{background:var(--brand);border-color:var(--brand);color:#fff}
.gal-empty{text-align:center;color:var(--ink-3);padding:64px 0;font-size:15px}