/* =========================================================
   tech.css — 핵심 기술 3개 페이지 전용 (tech-3d / tech-cae / tech-flow)
   sub.css 에서 이 페이지들에 실제로 쓰이는 규칙만 추출한 자립형 스타일시트.
   (greeting / history / value-card / process-flow / map 등 미사용 규칙은 제외)
   ========================================================= */

:root{--paper:#FFFFFF;--paper-2:#F4F5F7;--card:#FFFFFF;--ink:#0E1116;--ink-2:#565E69;--ink-3:#8A929D;--line:#D7DBE0;--line-2:#C3C8CF;--heat:#1E5FD6;--heat-dim:#1848A8;--f-display:"Space Grotesk","Pretendard",sans-serif;--f-body:"Pretendard",system-ui,sans-serif;--f-mono:"Space Mono",ui-monospace,monospace;--pad:clamp(20px,5vw,80px);--content:1440px;--maxw:calc(var(--content) + var(--pad) * 2);--vshow-ratio:16/9}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--f-body);background:var(--paper);color:var(--ink-2);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
html{overflow-x:hidden}
::selection{background:var(--heat);color:#fff} a{color:inherit;text-decoration:none} img{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--heat);outline-offset:3px}

/* ===== GNB header ===== */
.gnb{position:fixed;inset:0 0 auto 0;z-index:70;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
.gnb.scrolled,.gnb:hover,.gnb:focus-within{background:#fff;border-color:var(--line)}
.gnb-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:var(--maxw);margin:0 auto;padding:14px var(--pad)}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand-mark{width:38px;height:38px;background:url("../img/logo.png") center/contain no-repeat;flex:none}
.brand-txt{display:flex;flex-direction:column;line-height:1.12}
.brand-txt b{font-family:var(--f-display);font-weight:700;font-size:15.5px;color:#1B2A6B;letter-spacing:-.01em}
.brand-txt small{font-family:var(--f-body);font-weight:400;font-size:9px;letter-spacing:.1em;margin-top:3px;color:#1B2A6B;opacity:.72}
.gnb-menu{display:flex;gap:2px;margin-left:auto;margin-right:24px}
.gnb-item{position:relative}
.gnb-top{display:block;padding:22px 20px;font-size:15px;font-weight:500;color:var(--ink);letter-spacing:-.01em;position:relative}
.gnb-top::after{content:"";position:absolute;left:20px;right:20px;bottom:16px;height:2px;background:var(--heat);transform:scaleX(0);transform-origin:left;transition:transform .3s cubic-bezier(.16,1,.3,1)}
.gnb-item:hover .gnb-top::after,.gnb-item:focus-within .gnb-top::after,.gnb-item.is-active .gnb-top::after{transform:scaleX(1)}
.gnb-sub{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);min-width:190px;background:#fff;border:1px solid var(--line);box-shadow:0 26px 50px -16px rgba(20,35,80,.18);padding:8px;opacity:0;visibility:hidden;transition:opacity .25s,transform .25s,visibility 0s .25s}
.gnb-item:hover .gnb-sub,.gnb-item:focus-within .gnb-sub{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);transition:opacity .25s,transform .25s}
.gnb-sub a{display:block;padding:11px 18px;font-size:13.5px;color:var(--ink-2);white-space:nowrap;transition:.18s}
.gnb-sub a:hover,.gnb-sub a[aria-current="page"]{color:var(--heat);background:var(--paper-2)}
.gnb-cta{font-family:var(--f-mono);font-size:12px;letter-spacing:.12em;border:1px solid var(--ink);padding:10px 18px;color:var(--ink);transition:.25s;flex:none}
.gnb-cta:hover{background:var(--ink);color:#fff}
.gnb-burger{display:none;flex-direction:column;gap:5px;width:40px;height:40px;background:none;border:0;cursor:pointer;align-items:center;justify-content:center}
.gnb-burger span{width:22px;height:2px;background:var(--ink);transition:.3s}
.gnb.open .gnb-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.gnb.open .gnb-burger span:nth-child(2){opacity:0}
.gnb.open .gnb-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:980px){
  .gnb-menu{display:none} .gnb-cta{display:none} .gnb-burger{display:flex}
  .gnb.open{background:#fff;border-color:var(--line)}
  .gnb.open .gnb-menu{display:block;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:8px var(--pad) 24px;max-height:82vh;overflow:auto;margin:0}
  .gnb.open .gnb-top{padding:14px 0;font-size:17px}
  .gnb.open .gnb-top::after{display:none}
  .gnb.open .gnb-sub{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:0;padding:0 0 10px 14px;min-width:0}
  .gnb.open .gnb-sub a{padding:8px 0;color:var(--ink-3)}
}

/* ===== sub banner ===== */
.sub-banner{position:relative;height:clamp(360px,56vh,540px);overflow:hidden;display:flex;align-items:flex-end;background:#0b0e13;margin-top:0}
.sub-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.62) saturate(.92) contrast(1.03)}
.sub-banner .scrim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,22,.28),rgba(10,14,22,.12) 40%,rgba(10,14,22,.8))}
.sub-banner-inner{position:relative;z-index:2;width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad) clamp(36px,6vh,64px)}
.breadcrumb{font-family:var(--f-mono);font-size:12px;letter-spacing:.1em;color:#D3DBE4;margin-bottom:18px;display:flex;gap:10px;align-items:center}
.breadcrumb a{color:#D3DBE4} .breadcrumb .sep{color:var(--heat)} .breadcrumb b{color:#fff;font-weight:400}
.sub-title{font-family:var(--f-display);font-weight:600;color:#fff;font-size:clamp(32px,5.2vw,70px);line-height:1;letter-spacing:-.02em}
.sub-title .en{display:block;font-family:var(--f-mono);font-size:clamp(11px,1vw,13px);letter-spacing:.24em;color:#9FC0FF;margin-top:16px;text-transform:uppercase;font-weight:400}
.sub-lead{margin-top:20px;max-width:60ch;color:#E7EDF3;font-size:clamp(15px,1.5vw,18px);line-height:1.7}

/* ===== body shell ===== */
.sub-body{max-width:var(--maxw);margin:0 auto;padding:clamp(54px,8vh,96px) var(--pad)}
.sub-wrap{max-width:var(--content);margin-left:auto;margin-right:auto}
.block{margin-bottom:clamp(36px,6vh,60px)}
.block .k{font-family:var(--f-mono);font-size:12px;letter-spacing:.2em;color:var(--heat);text-transform:uppercase}
.block h2{font-family:var(--f-display);font-weight:600;color:var(--ink);font-size:clamp(24px,3vw,38px);line-height:1.1;letter-spacing:-.01em;margin:13px 0 18px}
.block p{color:var(--ink-2);font-size:15.5px;line-height:1.85;max-width:72ch;margin-bottom:10px}

/* ===== tech hero (intro + metrics) ===== */
.tech-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(280px,.95fr);gap:clamp(28px,5vw,84px);align-items:end;margin:0 0 clamp(58px,8vh,96px);padding:clamp(34px,5vw,64px) 0 clamp(38px,6vw,72px);border-bottom:1px solid var(--line)}
.tech-hero .k{display:block;font-family:var(--f-mono);font-size:12px;letter-spacing:.2em;color:var(--heat);text-transform:uppercase;margin-bottom:16px}
.tech-hero h2{font-family:var(--f-display);font-weight:700;color:var(--ink);font-size:clamp(30px,4.4vw,58px);line-height:1.06;letter-spacing:-.02em;max-width:13ch;margin:0 0 22px}
.tech-hero p{color:var(--ink-2);font-size:clamp(15px,1.2vw,17px);line-height:1.85;max-width:64ch;margin:0}
.tech-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-2);border:1px solid var(--line-2)}
.tech-metrics div{background:#fff;padding:clamp(20px,2.2vw,30px) clamp(16px,2vw,24px);min-height:138px;display:flex;flex-direction:column;justify-content:space-between}
.tech-metrics dt{font-family:var(--f-display);font-weight:700;color:var(--ink);font-size:clamp(20px,2vw,30px);line-height:1.05;letter-spacing:-.02em}
.tech-metrics dd{font-size:13.5px;color:var(--ink-2);line-height:1.55;margin:18px 0 0}

/* ===== step flow ===== */
.step-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-2);border:1px solid var(--line-2);margin-top:26px}
.step-flow div{position:relative;background:#fff;padding:28px 22px 30px;min-height:190px;display:flex;flex-direction:column}
.step-flow div::after{content:"";position:absolute;right:-10px;top:50%;width:18px;height:18px;background:#fff;border-top:1px solid var(--line-2);border-right:1px solid var(--line-2);transform:translateY(-50%) rotate(45deg);z-index:2}
.step-flow div:last-child::after{display:none}
.step-flow b{font-family:var(--f-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--heat);font-weight:700}
.step-flow strong{font-family:var(--f-display);font-size:20px;line-height:1.25;color:var(--ink);margin:22px 0 10px}
.step-flow span{font-size:14px;line-height:1.65;color:var(--ink-2)}
@media(max-width:980px){
  .tech-hero{grid-template-columns:1fr;align-items:start}
  .tech-metrics{grid-template-columns:1fr 1fr 1fr}
  .step-flow{grid-template-columns:1fr 1fr}
  .step-flow div:nth-child(2)::after{display:none}
}
@media(max-width:640px){
  .tech-metrics,.step-flow{grid-template-columns:1fr}
  .tech-metrics div{min-height:112px}
  .step-flow div{min-height:auto;padding:24px 20px}
  .step-flow div::after{display:none}
}

/* ===== spec list / chips ===== */
.spec-list{border-top:1px solid var(--line-2)}
.spec{display:grid;grid-template-columns:200px 1fr;gap:20px;padding:15px 0;border-bottom:1px solid var(--line)}
.spec dt{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;color:var(--ink-3);text-transform:uppercase}
.spec dd{color:var(--ink);font-size:15px}
@media(max-width:600px){.spec{grid-template-columns:1fr;gap:4px}}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips span{font-family:var(--f-mono);font-size:12px;letter-spacing:.05em;color:var(--ink-2);border:1px solid var(--line-2);padding:8px 14px;background:var(--card)}

/* ===== badge / vblock title ===== */
.vbadge{display:inline-block;font-family:var(--f-mono);font-size:12px;letter-spacing:.1em;color:#fff;background:linear-gradient(120deg,#1B2A6B,#1E5FD6);padding:8px 18px;border-radius:100px;margin-bottom:18px}

/* ===== reusable image slider (crossfade + dots) ===== */
.imgslider{position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background:var(--paper-2)}
.imgslider img,.tech__media__inner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .9s ease}
.imgslider img.on,.tech__media__inner img.on{opacity:1}
.imgslider-dots{position:absolute;left:0;right:0;bottom:16px;display:flex;justify-content:center;gap:8px;z-index:2}
.imgslider-dots button{width:8px;height:8px;border-radius:50%;border:0;cursor:pointer;background:rgba(255,255,255,.5);padding:0;transition:.25s;box-shadow:0 0 0 1px rgba(0,0,0,.08)}
.imgslider-dots button[aria-current="true"]{background:var(--heat);width:22px;border-radius:100px}

/* fit-aware rendering: contain = CAD 도면(잘리면 안 됨) / cover = 현장 사진 */
.imgslider img[data-fit="contain"]{object-fit:contain;object-position:left center;padding:clamp(20px,4vw,72px)}
.imgslider img[data-fit="cover"]{object-fit:cover;object-position:center}
.imgslider.is-contain{background:#fff}
.imgslider.is-cover{background:#0b0e13}
.tech__media__inner img,.tech__media__inner img[data-fit="contain"],.tech__media__inner img[data-fit="cover"]{object-fit:cover;object-position:center;padding:0}
.tech__media__inner.is-contain,.tech__media__inner.is-cover{background:#0b0e13}

/* click-to-enlarge hint */
.imgslider,.tech__media__inner{cursor:zoom-in}
/* 슬라이더 대신 단일 영상을 넣는 미디어 (.tech__media__inner--video) */
.tech__media__inner--video{cursor:default;background:#0b0e13}
.tech__media__inner--video video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.slider-zoom-hint{position:absolute;right:14px;bottom:14px;width:30px;height:30px;border-radius:50%;
  border:1px solid rgba(255,255,255,.7);background:rgba(14,17,22,.35);z-index:2;opacity:0;
  transition:opacity .25s;pointer-events:none}
.slider-zoom-hint::before{content:"";position:absolute;left:7px;top:7px;width:11px;height:11px;border-radius:50%;border:1.5px solid #fff}
.slider-zoom-hint::after{content:"";position:absolute;left:17px;top:17px;width:7px;height:1.5px;background:#fff;transform:rotate(45deg)}
.imgslider:hover .slider-zoom-hint,.imgslider:focus-within .slider-zoom-hint,
.tech__media:hover .slider-zoom-hint,.tech__media:focus-within .slider-zoom-hint{opacity:1}

/* full-bleed utility */
.fullbleed{width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw)}
.imgslider.fullbleed{aspect-ratio:21/9}
@media(max-width:760px){.imgslider.fullbleed{aspect-ratio:4/3}}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}

/* ===== TECH: 세부 분야 좌우 교차 행 + 마스크 내부 패럴랙스 ===== */
.tech{width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);background:var(--paper-2);padding-block:clamp(24px,4vh,48px)}
.tech__head{padding-bottom:clamp(24px,4vh,48px)}
.tech__head .eyebrow{display:block;font-family:var(--f-mono);font-size:12px;letter-spacing:.2em;color:var(--heat);text-transform:uppercase;margin-bottom:14px}
.tech__head h2{font-family:var(--f-display);font-weight:600;color:var(--ink);font-size:clamp(28px,4vw,48px);line-height:1.08;letter-spacing:-.02em;max-width:20ch;margin:0}
.tech__row{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:clamp(40px,5vw,100px);align-items:center;padding-block:clamp(64px,9vh,132px)}
.tech__row + .tech__row{border-top:1px solid var(--line)}
.tech__row--flip{grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr)}
.tech__row--flip .tech__media{order:1}
.tech__row--flip .tech__text{order:2}
.tech__text{max-width:44ch}
.tech__num{display:flex;align-items:center;gap:16px;font-family:var(--f-display);font-size:clamp(2.6rem,4.6vw,4.2rem);font-weight:700;line-height:1;letter-spacing:-.03em;color:var(--line-2);margin-bottom:24px}
@supports (-webkit-text-stroke:1px black){.tech__num{color:transparent;-webkit-text-stroke:1px var(--line-2)}}
.tech__num::after{content:"";flex:1;height:1px;background:linear-gradient(to right,var(--line-2),transparent)}
.tech__text h3{font-family:var(--f-display);font-weight:700;color:var(--ink);font-size:clamp(1.5rem,2.6vw,2.35rem);line-height:1.3;letter-spacing:-.03em;margin:0 0 28px}
.tech__text h3 .en{display:block;font-family:var(--f-mono);font-size:.42em;color:var(--ink-3);letter-spacing:.05em;margin-top:10px;text-transform:uppercase;font-weight:400}
.tech__text ul{list-style:none;display:grid;gap:0}
.tech__text ul li{position:relative;padding-left:22px;font-size:clamp(.94rem,1.05vw,1.03rem);line-height:1.75;color:var(--ink-2)}
.tech__text ul li + li{margin-top:12px}
.tech__text ul li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--heat)}
.tech__media{position:relative;width:100%;height:min(72vh,760px);min-height:400px;overflow:hidden;background:var(--paper-2)}
.tech__media__inner{position:absolute;inset:-9% -3%;will-change:transform}
.tech__media__inner[data-parallax="reduced"]{inset:-3% -1%}
.tech__media__tag{position:absolute;z-index:3;left:22px;bottom:22px;display:inline-flex;align-items:center;gap:8px;font-family:var(--f-mono);font-size:.68rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;background:rgba(14,17,22,.6);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.18);color:#fff;padding:9px 15px;border-radius:100px}
.tech__media__tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--heat);flex:none}
@media(prefers-reduced-motion:reduce){.tech__media__inner{transform:none!important}}
@media(max-width:1024px){
  .tech__row,.tech__row--flip{grid-template-columns:1fr;gap:32px;padding-block:56px}
  .tech__row--flip .tech__media{order:2}
  .tech__row--flip .tech__text{order:1}
  .tech__text{max-width:none}
  .tech__media{height:auto;aspect-ratio:4/3;min-height:0}
  .tech__media__inner{inset:-5% -2%}
  .tech__media__inner[data-parallax="reduced"]{inset:-2% -1%}
}
@media(max-width:640px){
  .fullbleed,.tech{width:100%;margin-left:0;margin-right:0}
  .sub-banner img{transform:none!important}
  .tech__media__inner,.tech__media__inner[data-parallax="reduced"]{inset:0!important;transform:none!important}
}

/* ===== full-width 7:3 split (media + text) ===== */
.fw-split{width:100%;display:grid;grid-template-columns:7fr 3fr;align-items:center;gap:0;margin-block:clamp(48px,8vh,110px);border:1px solid var(--line-2)}
.fw-split__media{position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background:var(--paper-2)}
.fw-split__media img,.fw-split__media video{width:100%;height:100%;object-fit:cover;display:block}
.fw-split__media img[data-fit="contain"]{object-fit:contain;object-position:left center;padding:clamp(20px,4vw,72px)}
.fw-split__media.is-contain{background:#fff}
.fw-split__media.is-cover{background:#0b0e13}
.fw-split__text{padding:clamp(24px,2.6vw,48px)}
.fw-split__text .vbadge{margin-bottom:16px}
.fw-split__text h3{font-family:var(--f-display);font-weight:700;color:var(--ink);font-size:clamp(20px,1.8vw,30px);line-height:1.2;letter-spacing:-.01em;margin:0 0 12px}
.fw-split__text h3 .en{display:block;font-family:var(--f-mono);font-size:.44em;color:var(--ink-3);letter-spacing:.05em;margin-top:8px;text-transform:uppercase;font-weight:400}
.fw-split__text p{color:var(--ink-2);font-size:15px;line-height:1.8;max-width:32ch;margin:0}
.fw-split.rev{grid-template-columns:3fr 7fr}
.fw-split.rev .fw-split__media{order:2}
.fw-split.rev .fw-split__text{order:1}
@media(max-width:1024px){
  .fw-split,.fw-split.rev{grid-template-columns:1fr}
  .fw-split .fw-split__media,.fw-split.rev .fw-split__media{order:0}
  .fw-split .fw-split__text,.fw-split.rev .fw-split__text{order:0}
  .fw-split__media{aspect-ratio:4/3}
  .fw-split__text{padding:24px}
}

/* ===== video showcase (tabs + big player) ===== */
/* [기본] .tech 섹션이 없을 때 — .tech-hero 의 border-bottom 이 구분선 역할을 하므로 여백만 */
.block:has(.vshow){margin-top:clamp(24px,4vh,56px)}
/* [.tech 회색 밴드 직후] 여백 확대 + 헤어라인. 명시도가 같으므로 반드시 위 규칙보다 뒤에 온다 */
.tech + .block,
.tech + .fw-split{margin-top:clamp(56px,9vh,120px)}
.tech + .block:has(.vshow){padding-top:clamp(28px,4vh,52px);border-top:1px solid var(--line)}
.vshow{display:grid;grid-template-columns:216px minmax(0,1fr);gap:24px;margin-top:clamp(20px,2.6vh,34px);align-items:start}
.vshow-tabs{display:flex;flex-direction:column;gap:8px}
.vshow-tab{position:relative;display:flex;flex-direction:column;gap:8px;text-align:left;font-family:var(--f-display);font-weight:500;font-size:15px;color:var(--ink-2);background:var(--card);border:1px solid var(--line-2);padding:16px 18px 14px;cursor:pointer;transition:.22s}
.vshow-tab:hover{border-color:var(--line);color:var(--ink)}
.vshow-tab[aria-selected="true"]{color:var(--ink);border-color:var(--heat)}
.vshow-bar{position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--line-2);transition:background .22s}
.vshow-tab[aria-selected="true"] .vshow-bar{background:var(--heat)}
.vshow-progress{display:block;height:2px;background:var(--line);overflow:hidden}
.vshow-progress i{display:block;height:100%;width:0;background:var(--heat)}
.vshow-stage{position:relative;width:100%;aspect-ratio:var(--vshow-ratio);max-height:min(78vh,820px);overflow:hidden;border:1px solid var(--line-2);background:#0b0e13;transition:aspect-ratio .35s ease}
.vshow-video{width:100%;height:100%;object-fit:contain;display:block;background:#0b0e13}
.vshow-play{position:absolute;inset:0;margin:auto;width:64px;height:64px;border-radius:50%;border:1px solid rgba(255,255,255,.5);background:rgba(14,17,22,.4);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:.25s}
.vshow-play:hover{background:var(--heat);border-color:var(--heat)}
.vshow-play::after{content:"";width:0;height:0;border-style:solid;border-width:9px 0 9px 15px;border-color:transparent transparent transparent #fff;margin-left:4px}
@media(max-width:860px){
  .vshow{grid-template-columns:1fr}
  .vshow-tabs{flex-direction:row;overflow-x:auto;gap:10px;-webkit-overflow-scrolling:touch;padding-bottom:4px}
  .vshow-tab{flex:0 0 auto;white-space:nowrap;padding:12px 16px}
  .vshow-bar{display:none}
  .vshow-tab[aria-selected="true"]{background:var(--paper-2)}
}

/* ===== lightbox ===== */
.lightbox{position:fixed;inset:0;z-index:300;display:flex;align-items:center;justify-content:center}
.lightbox[hidden]{display:none}
.lightbox-backdrop{position:absolute;inset:0;background:rgba(11,14,19,.92)}
.lightbox-img{position:relative;max-width:92vw;max-height:92vh;object-fit:contain;background:#fff;box-shadow:0 30px 80px -20px rgba(0,0,0,.6)}
.lightbox-close,.lightbox-prev,.lightbox-next{position:absolute;z-index:2;border:1px solid rgba(255,255,255,.3);background:rgba(14,17,22,.4);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.25s}
.lightbox-close:hover,.lightbox-prev:hover,.lightbox-next:hover{background:var(--heat);border-color:var(--heat)}
.lightbox-close{top:20px;right:20px;width:44px;height:44px;border-radius:50%;font-size:22px}
.lightbox-prev,.lightbox-next{top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:50%;font-size:26px}
.lightbox-prev{left:20px}
.lightbox-next{right:20px}
@media(max-width:640px){
  .lightbox-close{top:12px;right:12px;width:38px;height:38px;font-size:18px}
  .lightbox-prev,.lightbox-next{width:42px;height:42px;font-size:20px}
  .lightbox-prev{left:8px}
  .lightbox-next{right:8px}
}

/* ===== related ===== */
.related{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad) clamp(56px,8vh,100px)}
.related-in{border-top:1px solid var(--line);padding-top:34px}
.related .k{font-family:var(--f-mono);font-size:12px;letter-spacing:.2em;color:var(--ink-3);text-transform:uppercase}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
.related-grid a{border:1px solid var(--line-2);background:var(--card);padding:20px;transition:.22s;display:flex;justify-content:space-between;align-items:center;font-family:var(--f-display);font-weight:500;color:var(--ink-2)}
.related-grid a:hover{border-color:var(--heat);color:var(--ink);background:rgba(30,95,214,.05)}
.related-grid a span{color:var(--heat)}
@media(max-width:760px){.related-grid{grid-template-columns:1fr 1fr}}

/* ===== footer ===== */
.foot{background:#0E1116;color:#AEB6C0;padding:clamp(60px,9vh,96px) var(--pad) 34px;position:relative;border-top:1px solid var(--line)}
.foot-in{max-width:var(--content);margin:0 auto}
.foot-grid{display:grid;grid-template-columns:1.35fr 3fr;gap:clamp(36px,5vw,80px)}
.fb-top{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.foot .brand-mark{width:44px;height:44px}
.fb-name{display:flex;flex-direction:column;line-height:1.15}
.fb-name b{font-family:var(--f-display);font-weight:700;color:#fff;font-size:17px;letter-spacing:-.01em}
.fb-name small{font-family:var(--f-body);font-size:9px;letter-spacing:.1em;color:#7C8794;margin-top:3px}
.foot-brand p{color:#8A929D;font-size:13.5px;line-height:1.75;margin:0 0 22px;max-width:36ch}
.foot-company{display:grid;gap:7px;font-family:var(--f-mono);font-size:11.5px;color:#6E7885;letter-spacing:.02em}
.foot-company b{color:#AEB6C0;font-weight:400}
.foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.foot-col h4{margin:0 0 14px}
.foot-col h4 a{font-family:var(--f-display);font-weight:600;color:#fff;font-size:14px}
.foot-col h4 a:hover{color:#7FB0FF}
.foot-col a{display:block;color:#8A929D;font-size:12.5px;padding:6px 0;transition:color .2s}
.foot-col>a:hover{color:#7FB0FF}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin-top:clamp(44px,6vh,76px);padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-family:var(--f-mono);font-size:12px;color:#6E7885}
.foot-legal{display:flex;gap:22px}
.foot-legal a:hover{color:#fff}
.to-top{position:absolute;top:clamp(48px,7vh,80px);right:var(--pad);width:60px;height:60px;border-radius:50%;border:1px solid rgba(255,255,255,.22);background:transparent;color:#fff;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;transition:.3s}
.to-top svg{width:18px;height:18px}
.to-top span{font-family:var(--f-mono);font-size:9px;letter-spacing:.12em}
.to-top:hover{background:var(--heat);border-color:var(--heat);transform:translateY(-3px)}
@media(max-width:1024px){.foot-grid{grid-template-columns:1fr;gap:44px}.to-top{width:52px;height:52px}}
@media(max-width:600px){.foot-cols{grid-template-columns:1fr;gap:28px}.foot-bottom{flex-direction:column;align-items:flex-start}}

/* ===== scroll interactions ===== */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--heat);z-index:80}
.sub-banner img{opacity:0;transition:opacity 1.1s ease}
.sub-banner img.show{opacity:1}
.sub-banner-inner .breadcrumb,.sub-banner-inner .sub-title,.sub-banner-inner .sub-lead{opacity:0;transform:translateY(20px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1)}
.sub-banner-inner.show .breadcrumb{transition-delay:.05s}
.sub-banner-inner.show .sub-title{transition-delay:.16s}
.sub-banner-inner.show .sub-lead{transition-delay:.32s}
.sub-banner-inner.show .breadcrumb,.sub-banner-inner.show .sub-title,.sub-banner-inner.show .sub-lead{opacity:1;transform:translateY(0)}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:translateY(0)}
.chips span.reveal{transform:translateY(12px)}
.related-grid a.reveal{transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1),border-color .22s,color .22s,background .22s}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  .sub-banner img{opacity:1!important;transition:none!important}
  .sub-banner-inner .breadcrumb,.sub-banner-inner .sub-title,.sub-banner-inner .sub-lead{opacity:1!important;transform:none!important;transition:none!important}
}

/* ── 언어 스위처 (KO/EN/JP 링크) ── */
.lang-switch{display:inline-flex;gap:1px;align-items:center;flex:none;margin-right:14px}
.lang-switch a{font-family:var(--f-mono,ui-monospace,monospace);font-size:11px;letter-spacing:.08em;line-height:1;padding:6px 7px;color:#fff;opacity:.55;text-decoration:none;border:1px solid transparent;border-radius:2px;transition:opacity .2s,border-color .2s;cursor:pointer}
.gnb.scrolled .lang-switch a,.gnb:hover .lang-switch a,.gnb:focus-within .lang-switch a{color:var(--ink,#111)}
.lang-switch a:hover{opacity:1}
.lang-switch a[aria-current="page"]{opacity:1;border-color:currentColor}
@media(max-width:920px){.lang-switch{margin-right:8px}.lang-switch a{padding:5px 6px;font-size:10px}}