:root{
  --accent:#2A3048;
  --accent-soft:#E9ECF4;
  --ink:#000000;
  --gray:#5B6169;
  --line:#E5E5E5;
  --serif:'Noto Serif KR', serif;
  --sans:'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{font-family:var(--sans);color:#22262B;line-height:1.65;background:#fff;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3{font-family:var(--serif);font-weight:600;color:#161A1F;margin:0;}
.wrap{max-width:1280px;margin:0 auto;padding:0 24px;}
ul{margin:0;padding:0;list-style:none;}

/* ---------- header (header_variant=1, joseon-center) ---------- */
.site-header{position:sticky;top:0;z-index:50;background:#FFFFFF;border-bottom:1px solid #000;}
.header-inner{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;height:76px;}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;justify-self:center;}
.logo-icon{width:32px;height:32px;color:var(--accent);flex:none;}
.logo-icon svg{width:100%;height:100%;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-brand{font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:-0.02em;color:#000;}
.logo-keyword{font-size:.7rem;font-weight:400;color:var(--accent);letter-spacing:.04em;}
.nav{display:flex;align-items:center;gap:26px;font-size:15px;font-weight:500;}
.nav-left{justify-self:start;}
.nav-right{justify-self:end;}
.nav-drop{position:relative;}
.nav-drop > a{display:flex;align-items:center;gap:4px;}
.nav-drop-list{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);min-width:220px;padding:8px 0;display:none;flex-direction:column;box-shadow:0 12px 28px rgba(0,0,0,.08);}
.nav-drop-list a{padding:10px 18px;font-size:14px;white-space:nowrap;}
.nav-drop-list a:hover{background:var(--accent-soft);color:var(--accent);}
.nav-drop:hover .nav-drop-list{display:flex;}
.btn-cta{background:var(--accent);color:#fff !important;padding:11px 22px;font-weight:700;font-size:14px;border-radius:0;white-space:nowrap;}
.nav-toggle{display:none;background:none;border:0;font-size:24px;cursor:pointer;}

/* ---------- buttons ---------- */
.btn-outline{display:inline-block;border:1px solid #fff;color:#fff;padding:13px 28px;font-weight:700;font-size:15px;border-radius:0;}
.btn-fill{display:inline-block;background:var(--accent);color:#fff;padding:13px 28px;font-weight:700;font-size:15px;border-radius:0;}
.btn-outline-dark{display:inline-block;border:1px solid #161A1F;color:#161A1F;padding:13px 28px;font-weight:700;font-size:15px;border-radius:0;}

/* ---------- section label (eyebrow + SVG icon) ---------- */
.section-head{max-width:640px;margin:0 auto 44px;text-align:center;}
.section-label{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--accent);margin-bottom:10px;}
.section-label__icon{width:18px;height:18px;flex-shrink:0;}
.section-title{font-size:30px;line-height:1.4;}
.section-sub{margin-top:14px;color:var(--gray);font-size:15px;}
.section{padding:88px 0;}

/* ---------- hero (hero_id=2, split panel) ---------- */
.hero{background:#fff;padding:56px 0 72px;}
.hero__panel{max-width:1280px;margin:0 auto;background:#F5F4F2;border-radius:24px;padding:52px;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;}
.hero__eyebrow{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;margin-bottom:16px;}
.hero h1{font-size:40px;line-height:1.35;margin-bottom:18px;}
.hero__sub{color:var(--gray);font-size:16px;line-height:1.75;margin-bottom:28px;}
.hero__cta{display:flex;gap:12px;margin-bottom:28px;}
.hero__cta .btn-fill,.hero__cta .btn-outline-dark{border-radius:0;padding:14px 26px;font-weight:700;font-size:15px;}
.hero__checks{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:#3A3F46;}
.hero__checks li{display:flex;align-items:center;gap:6px;}
.hero__checks li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);}
.hero__photo img{border-radius:14px;width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}

/* ---------- card hover / section_variant=6 border-lift ---------- */
.hover-frame{position:relative;border:1px solid var(--line);transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;}
.hover-frame:hover{border-color:#000;transform:translateY(-4px);box-shadow:0 10px 22px rgba(0,0,0,.06);}
.case-card.hover-frame{border:none;}
.case-card.hover-frame:hover{border:none;box-shadow:none;}

/* ---------- why cards ---------- */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.why-card{background:#fff;padding:32px 26px;}
.why-card h3{font-family:var(--sans);font-size:17px;font-weight:700;margin-bottom:10px;}
.why-card p{font-size:14px;color:var(--gray);}

/* ---------- why-us zigzag ---------- */
.zigzag-item{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-bottom:56px;}
.zigzag-item:last-child{margin-bottom:0;}
.zigzag-num{font-size:13px;font-weight:700;color:var(--accent);margin-bottom:10px;}
.zigzag-text h3{font-size:20px;margin-bottom:12px;}
.zigzag-text p{color:var(--gray);font-size:15px;line-height:1.75;}
.zigzag-photo img{border-radius:14px;width:100%;aspect-ratio:4/3;object-fit:cover;}

/* ---------- courses ---------- */
.courses-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.course-card{background:#fff;padding:30px 24px;}
.course-icon{width:40px;height:40px;color:var(--accent);margin-bottom:16px;flex-shrink:0;overflow:hidden;}
.course-icon svg{display:block;width:100%;height:100%;max-width:40px;max-height:40px;}
.course-card h3{font-family:var(--sans);font-size:17px;font-weight:700;margin-bottom:8px;}
.course-card p{font-size:13.5px;color:var(--gray);}

/* ---------- after ---------- */
.after-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.after-card{background:#fff;padding:30px 24px;}
.after-card h3{font-family:var(--sans);font-size:17px;font-weight:700;margin-bottom:10px;}
.after-card p{font-size:14px;color:var(--gray);}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.about-text p{color:var(--gray);font-size:15px;margin-bottom:16px;}
.about-photo img{border-radius:14px;width:100%;aspect-ratio:4/3;object-fit:cover;}

/* ---------- home cases ---------- */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.case-card{background:#fff;position:relative;}
.case-card__img{width:100%;aspect-ratio:1/1;overflow:hidden;border-radius:12px;}
.case-card__img img{width:100%;height:100%;object-fit:cover;border-radius:12px;transition:transform .5s ease;}
.case-card:hover .case-card__img img{transform:scale(1.05);}
.case-card__label{display:block;padding:14px 4px 4px;font-size:14.5px;font-weight:600;line-height:1.5;}
.section-cta{text-align:center;margin-top:40px;}

/* ---------- faq ---------- */
.faq-list{max-width:820px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:20px 4px;cursor:pointer;font-weight:700;font-size:15.5px;}
.faq-q::after{content:'+';font-size:20px;font-weight:400;color:var(--accent);transition:transform .25s ease;}
.faq-item.open .faq-q::after{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;font-size:14.5px;color:var(--gray);}
.faq-a p{padding:0 4px 20px;}

/* ---------- closing ---------- */
.closing{position:relative;min-height:650px;background-size:cover;background-position:center;display:flex;align-items:center;justify-content:center;}
.closing-overlay{position:absolute;inset:0;background:rgba(19,19,19,.55);}
.closing-inner{position:relative;text-align:center;color:#fff;max-width:820px;padding:0 24px;}
.closing-inner h2{color:#fff;font-size:clamp(15px,4vw,32px);line-height:1.4;margin-bottom:16px;white-space:nowrap;}
.closing-inner p{font-size:15px;opacity:.9;margin-bottom:28px;}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:56px 0 20px;}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;}
.footer-desc{color:var(--gray);font-size:14px;margin-top:10px;}
.footer-info p{font-size:13.5px;color:var(--gray);margin:0 0 8px;}
.footer-info a{color:var(--gray);}
.footer-nav{display:flex;flex-direction:column;gap:10px;font-size:14px;}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);font-size:12.5px;color:#9CA0A6;}

/* ---------- mobile bar ---------- */
.mobile-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);}
.mobile-bar__btn{flex:1;text-align:center;padding:14px 0;font-weight:700;font-size:15px;color:var(--accent);}
.mobile-bar__btn--call{background:var(--accent);color:#fff;}

/* ---------- portfolio list (mandatory irregular 12-card grid) ---------- */
.case-hero{min-height:38vh;display:flex;align-items:center;background:var(--accent);color:#fff;}
.case-hero h1,.case-hero-title{color:#fff;font-size:32px;font-family:var(--serif);font-weight:600;margin:0;}
.cases-grid-flex{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;}
.cases-grid-flex .case-card{grid-column:span 6;}
.cases-grid-flex .case-card:nth-child(12n+1),
.cases-grid-flex .case-card:nth-child(12n+6),
.cases-grid-flex .case-card:nth-child(12n+9){grid-column:span 4;}
.cases-grid-flex .case-card:nth-child(12n+1) .case-card__img,
.cases-grid-flex .case-card:nth-child(12n+6) .case-card__img,
.cases-grid-flex .case-card:nth-child(12n+9) .case-card__img{aspect-ratio:5/6;}
.cases-grid-flex .case-card:nth-child(12n+2),
.cases-grid-flex .case-card:nth-child(12n+5),
.cases-grid-flex .case-card:nth-child(12n+10){grid-column:span 8;}
.cases-grid-flex .case-card:nth-child(12n+2) .case-card__img,
.cases-grid-flex .case-card:nth-child(12n+5) .case-card__img,
.cases-grid-flex .case-card:nth-child(12n+10) .case-card__img{aspect-ratio:9.45/5;}
.cases-grid-flex .case-card__img{aspect-ratio:7/6;border-radius:0;}
.cases-grid-flex .case-card__img img{border-radius:0;}
.pagination{display:flex;justify-content:center;gap:10px;margin-top:56px;}
.pagination a,.pagination span{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;}
.pagination .current{background:#161A1F;color:#fff;}

/* ---------- portfolio detail ---------- */
.kh-single{padding:64px 0 0;}
.kh-single__thumb{max-width:550px;margin:0 auto 40px;border-radius:12px;overflow:hidden;aspect-ratio:11/10;}
.kh-single__thumb img{width:100%;height:100%;object-fit:cover;border-radius:12px;}
.kh-single__body-wrap{max-width:760px;margin:0 auto;}
.kh-single__index{font-size:13px;color:#888;letter-spacing:.04em;margin-bottom:14px;display:block;}
.kh-single__title{font-size:28px;font-weight:800;line-height:1.35;margin:0 0 14px;font-family:var(--serif);}
.kh-single__related{font-size:13.5px;color:var(--gray);margin:0 0 36px;}
.kh-single__related a{color:var(--accent);font-weight:600;margin-right:10px;}
.kh-single__body h2{font-size:20px;margin-top:48px;margin-bottom:16px;font-family:var(--serif);}
.kh-single__body p{font-size:15.5px;color:#333;}
.kh-gallery{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:760px;margin:32px auto;}
.kh-gallery.kh-gallery--compact{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));}
.kh-gallery img{width:100%;aspect-ratio:4/3;max-height:480px;object-fit:cover;border-radius:8px;cursor:pointer;}
.process-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #E0E0DC;max-width:960px;margin:0 auto;}
.process-item{padding:28px 20px 28px 24px;border-right:1px solid #E0E0DC;}
.process-item:first-child{padding-left:0;}
.process-item:last-child{border-right:none;}
.pnum{display:block;font-size:13px;font-weight:700;color:var(--accent);margin-bottom:10px;}
.process-item h3{font-size:16px;font-weight:800;color:#22262B;margin:0 0 8px;}
.process-item p{font-size:13.5px;color:#5B6169;line-height:1.65;margin:0;}
.related-row{max-width:960px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.detail-cta{text-align:center;padding:64px 0;}

/* ---------- lightbox ---------- */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.88);display:none;align-items:center;justify-content:center;z-index:100;}
.lightbox.open{display:flex;}
.lightbox__img{max-width:92vw;max-height:88vh;object-fit:contain;}
.lightbox__close{position:absolute;top:20px;right:28px;background:none;border:0;color:#fff;font-size:34px;cursor:pointer;}
.lightbox__prev,.lightbox__next{position:absolute;top:50%;transform:translateY(-50%);background:none;border:0;color:#fff;font-size:30px;cursor:pointer;padding:12px;}
.lightbox__prev{left:12px;}
.lightbox__next{right:12px;}

/* ---------- overview table ---------- */
.overview-table{width:100%;max-width:760px;margin:32px auto 0;border-collapse:collapse;font-size:14.5px;}
.overview-table th,.overview-table td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;}
.overview-table th{width:120px;color:var(--gray);font-weight:600;background:#FAFAF9;}
.overview-table td{color:#22262B;}
.cat-lead{max-width:640px;margin:14px auto 0;color:var(--gray);font-size:15px;}

/* ---------- category page ---------- */
.cat-hero{padding:70px 0 40px;text-align:center;}
.cat-hero h1{font-size:34px;}
.cat-top-photo{max-width:760px;margin:0 auto 8px;border-radius:12px;overflow:hidden;aspect-ratio:16/9;}
.cat-top-photo img{width:100%;height:100%;object-fit:cover;}
.cat-body{max-width:760px;margin:0 auto;}
.cat-body h2{font-size:20px;margin-top:40px;margin-bottom:14px;font-family:var(--serif);}
.cat-body p{font-size:15.5px;color:#333;}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .why-grid,.courses-grid,.after-grid,.cases-grid{grid-template-columns:repeat(2,1fr);}
  .hero__panel{grid-template-columns:1fr;padding:36px;}
  .footer-inner{grid-template-columns:1fr;}
  .zigzag-item{grid-template-columns:1fr;}
  .zigzag-item .zigzag-photo{order:-1;}
}
@media(max-width:767px){
  .nav{display:none;}
  .nav-toggle{display:block;}
  .header-cta{display:none;}
  .header-inner{grid-template-columns:auto 1fr auto;}
  .why-grid,.courses-grid,.after-grid,.cases-grid,.about-grid,.related-row{grid-template-columns:1fr !important;}
  .mobile-bar{display:flex;}
  .section{padding:56px 0;}
  .hero h1{font-size:28px;}
  .hero__panel{border-radius:18px;padding:24px;}
  .kh-single__title{font-size:22px;}
  .kh-gallery{grid-template-columns:1fr;}
  .process-list{grid-template-columns:1fr 1fr;}
  .process-item{padding:22px 16px !important;}
  .cases-grid-flex{grid-template-columns:1fr;}
  .cases-grid-flex .case-card{grid-column:span 1 !important;}
  .cases-grid-flex .case-card__img{aspect-ratio:4/3 !important;}
  body{padding-bottom:54px;}
}