/* =============================================================================
 * SCALE BUILD — 파사드 제품 랜딩/대시보드 (SCALE 흑백 모노톤 · Spoqa · 삼선표)
 * A1 사업성 분석기와 동일 디자인 언어. 콘텐츠는 파사드 리노베이션.
 * ========================================================================== */
:root{
  --ink:#000; --ink-2:#444; --ink-3:#6f6f6f; --rule:#e5e5e5; --rule-strong:#000;
  --surface-alt:#f6f6f6; --bg:#fff;
  --tint-1:rgba(0,0,0,.72); --tint-2:rgba(0,0,0,.5); --tint-3:rgba(0,0,0,.28);
  --ease:cubic-bezier(.22,1,.36,1); --maxw:1160px;
  --font:"Spoqa Han Sans Neo",-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-feature-settings:"tnum" 1;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font-family:var(--font)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(24px,5vw,56px)}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2)}

/* ----- 버튼 ----- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:52px;padding:0 24px;font-weight:700;font-size:15.5px;border:1px solid var(--ink);background:var(--ink);color:#fff;border-radius:2px;cursor:pointer;transition:background .18s var(--ease),color .18s var(--ease),transform .1s var(--ease)}
.btn:active{transform:scale(.985)}
@media (hover:hover){.btn:hover{background:#fff;color:var(--ink)}}
.btn--lg{height:58px;padding:0 30px;font-size:16.5px}
.btn--block{width:100%}
.btn--ghost{background:#fff;color:var(--ink)}
@media (hover:hover){.btn--ghost:hover{background:var(--ink);color:#fff}}
.btn--outline{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--on-dark{background:#fff;color:#000;border-color:#fff}
@media (hover:hover){.btn--on-dark:hover{background:transparent;color:#fff}}
.play-btn{display:inline-flex;align-items:center;gap:11px;color:var(--ink);font-weight:600;font-size:15px;background:none;border:0;cursor:pointer}
.play-btn .pic{width:38px;height:38px;border-radius:50%;border:1px solid var(--ink);display:flex;align-items:center;justify-content:center;font-size:12px;transition:background .15s,color .15s}
@media (hover:hover){.play-btn:hover .pic{background:var(--ink);color:#fff}}

/* ----- 개발 진행 바 ----- */
.wip-bar{display:flex;align-items:center;justify-content:center;gap:12px;background:var(--ink);color:#fff;padding:7px 24px;font-size:12px;font-weight:700;letter-spacing:.08em;text-align:center}
.wip-bar .dot{width:7px;height:7px;border-radius:50%;background:#fff;flex:none;animation:wip 1.6s ease-in-out infinite}
.wip-bar .sep{color:rgba(255,255,255,.4)}.wip-bar .muted{color:rgba(255,255,255,.6);font-weight:400}
@keyframes wip{0%,100%{opacity:1}50%{opacity:.25}}
@media (max-width:560px){.wip-bar .sep,.wip-bar .muted{display:none}}

/* ----- 내비 ----- */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.93);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:baseline;gap:8px;font-weight:700;letter-spacing:.02em;font-size:18px;color:var(--ink)}
.brand span{color:var(--ink-3);font-size:11px;font-weight:700;letter-spacing:.16em}
.nav-r{display:flex;align-items:center;gap:24px}
.nav-link{color:var(--ink-2);font-size:15px;font-weight:500;position:relative;padding-block:4px}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease)}
@media (hover:hover){.nav-link:hover{color:var(--ink)}.nav-link:hover::after{transform:scaleX(1)}}
.top .btn{height:44px;font-size:14.5px;padding:0 18px}
@media (max-width:760px){.nav-r .nav-link{display:none}}

/* ----- 히어로 ----- */
.hero{padding:clamp(44px,6vw,80px) 0 clamp(48px,7vw,84px)}
.hero .wrap{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(32px,5vw,64px);align-items:center}
.hero h1{font-size:clamp(2.1rem,4.4vw,3.4rem);line-height:1.1;font-weight:700;letter-spacing:-.02em;margin:18px 0 0}
.hero .sub{color:var(--ink-2);font-size:clamp(16px,1.2vw,18px);margin:22px 0 28px;max-width:32em}
.hero .ctas{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.hero .offer-chip{display:inline-flex;align-items:center;gap:8px;margin-top:26px;border:1px solid var(--rule);color:var(--ink-2);font-size:13px;font-weight:700;padding:8px 14px;border-radius:2px}
.hero .offer-chip b{color:var(--ink)}
@media (max-width:840px){.hero .wrap{grid-template-columns:1fr;gap:28px}.hero .visual{order:2}}

/* before/after 슬라이더 (이미지) */
.ba{position:relative;width:100%;aspect-ratio:1/1;overflow:hidden;background:#111;user-select:none;touch-action:none;border:1px solid var(--rule)}
.ba img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ba .layer-before{z-index:2;clip-path:inset(0 var(--clip,50%) 0 0)}
.ba .tag{position:absolute;top:14px;z-index:5;font-size:11px;font-weight:800;letter-spacing:.12em;color:#fff;background:rgba(0,0,0,.6);padding:5px 11px;border-radius:2px}
.ba .tag.b{left:14px}.ba .tag.a{right:14px;background:var(--ink)}
.ba .divider{position:absolute;top:0;bottom:0;width:2px;background:#fff;z-index:6;transform:translateX(-1px)}
.ba .handle{position:absolute;top:50%;z-index:7;width:46px;height:46px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);box-shadow:0 4px 14px rgba(0,0,0,.45);cursor:ew-resize;display:flex;align-items:center;justify-content:center;color:#000;font-size:17px}
.ba .hint{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);z-index:5;font-size:12px;color:#fff;background:rgba(0,0,0,.55);padding:5px 12px;border-radius:2px}
.ba-cap{margin-top:12px;font-size:12.5px;color:var(--ink-3);text-align:center}

/* ----- 섹션 ----- */
.sec{padding:clamp(56px,8vw,112px) 0}
.sec--alt{background:var(--surface-alt);border-block:1px solid var(--rule)}
.sec-head{margin-bottom:clamp(32px,4vw,52px)}
.sec-k{color:var(--ink-2);font-weight:700;font-size:12px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:12px}
.sec-h{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;letter-spacing:-.015em;color:var(--ink)}
.sec-sub{color:var(--ink-2);font-size:16px;margin-top:12px;max-width:48em}

/* 무료 오퍼 밴드 */
.offer{background:var(--surface-alt);border-block:1px solid var(--rule)}
.offer .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:44px 0;flex-wrap:wrap}
.offer h2{font-size:clamp(1.25rem,2.2vw,1.7rem);font-weight:700;letter-spacing:-.01em}
.offer p{color:var(--ink-2);font-size:15px;margin-top:8px}

/* 작동 방식 3단계 */
.steps3{display:grid;grid-template-columns:repeat(3,1fr)}
.s3{padding:36px 28px 30px 0;border-top:1px solid var(--ink)}
.s3 .no{font-weight:300;font-size:42px;line-height:1;color:var(--ink-3);letter-spacing:-.02em}
.s3 h3{font-size:18px;font-weight:700;margin:16px 0 9px}
.s3 p{color:var(--ink-2);font-size:14.5px}
@media (max-width:760px){.steps3{grid-template-columns:1fr}}

/* ----- 컨피규레이터 (실제 이미지) ----- */
.cfg-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,48px);align-items:start}
.cfg-preview{position:sticky;top:88px}
.pv{position:relative;aspect-ratio:1/1;overflow:hidden;background:#111;border:1px solid var(--rule)}
.pv img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.pv .before-layer{z-index:3;opacity:0;transition:opacity .25s var(--ease)}
.pv.showbefore .before-layer{opacity:1}
.pv .badge{position:absolute;top:13px;left:13px;z-index:4;font-size:11px;font-weight:800;letter-spacing:.08em;color:#fff;background:var(--ink);padding:5px 11px;border-radius:2px}
.pv.showbefore .badge{background:rgba(0,0,0,.6)}
.cmp{margin-top:12px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.pill{background:#fff;border:1px solid var(--ink-2);border-radius:2px;font-size:13px;font-weight:700;color:var(--ink-2);padding:9px 14px;cursor:pointer}
@media (hover:hover){.pill:hover{border-color:var(--ink);color:var(--ink)}}
.cfg-now{font-size:13px;color:var(--ink-3)}.cfg-now b{color:var(--ink)}
.step-h{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.step-h .no{width:24px;height:24px;border-radius:50%;background:var(--ink);color:#fff;font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center}
.step-h .t{font-size:15.5px;font-weight:700}
.styles{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:24px}
.style{cursor:pointer;border:2px solid var(--rule);border-radius:2px;overflow:hidden;background:#fff;padding:0;text-align:left;transition:border-color .15s}
@media (hover:hover){.style:hover{border-color:var(--ink-3)}}
.style.sel{border-color:var(--ink)}
.style img{width:100%;aspect-ratio:1/1;object-fit:cover;display:block}
.style .nm{display:block;font-size:11px;font-weight:700;color:var(--ink);padding:7px 8px;line-height:1.2}
.cfg-desc{border-left:2px solid var(--ink);padding:4px 0 4px 16px;font-size:14px;color:var(--ink-2);margin-bottom:22px}
.cfg-desc b{color:var(--ink)}
.cfg-cta .btn{width:100%}
@media (max-width:840px){.cfg-grid{grid-template-columns:1fr}.cfg-preview{position:static}}
@media (max-width:480px){.styles{grid-template-columns:repeat(3,1fr)}}

/* 가치 3 (삼선 구분) */
.props{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.prop{padding:32px 28px 28px 0;border-top:1px solid var(--ink)}
.prop .ic{font-weight:300;font-size:32px;color:var(--ink-3);margin-bottom:14px}
.prop h3{font-size:18px;font-weight:700;margin-bottom:8px}
.prop p{color:var(--ink-2);font-size:14.5px}
@media (max-width:760px){.props{grid-template-columns:1fr}}

/* 삼선표 */
.tri{font-size:15px;border-collapse:collapse;width:100%;max-width:680px}
.tri thead th{font-weight:700;text-align:left;padding:12px 16px;border-top:2px solid var(--ink);border-bottom:1px solid var(--ink-2)}
.tri tbody td{padding:12px 16px}
.tri tbody tr:last-child td{border-bottom:2px solid var(--ink)}
.tri td.muted{color:var(--ink-2)}

/* 스탯 */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px}
.stat .n{font-size:clamp(2.4rem,4.5vw,3.4rem);font-weight:300;color:var(--ink);line-height:1;letter-spacing:-.02em}
.stat .l{color:var(--ink-2);font-weight:500;margin-top:12px;font-size:14.5px}
@media (max-width:760px){.stats{grid-template-columns:1fr;gap:32px}}

/* 갤러리 */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gcell{position:relative;overflow:hidden;border:1px solid var(--rule)}
.gcell img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .4s var(--ease)}
@media (hover:hover){.gcell:hover img{transform:scale(1.05)}}
.gcell .cap{position:absolute;left:0;bottom:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.66));color:#fff;font-size:12px;font-weight:700;padding:18px 12px 10px}
@media (max-width:760px){.gallery{grid-template-columns:repeat(2,1fr)}}

/* 가입 전환 (순흑 밴드) */
.join{background:var(--ink);color:#fff;text-align:center}
.join .wrap{padding:clamp(64px,9vw,116px) 0}
.join h2{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:700;letter-spacing:-.01em}
.join p{color:rgba(255,255,255,.7);margin:16px auto 30px;font-size:16px;max-width:42em}

/* 푸터 */
.foot{border-top:1px solid var(--rule)}
.foot .wrap{padding:48px 0 56px;display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:18px}
.foot .brand{margin-bottom:8px}
.foot a{color:var(--ink-2)}@media (hover:hover){.foot a:hover{color:var(--ink)}}
.foot .links{display:flex;gap:18px;font-size:14px;flex-wrap:wrap}
.foot .legal{width:100%;border-top:1px solid var(--rule);padding-top:16px;margin-top:8px;font-size:12px;color:var(--ink-3);line-height:1.6}

/* ----- 모달 ----- */
.modal{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;padding:24px}
.modal.is-open{display:flex}
.modal__card{background:#fff;border-radius:2px;width:100%;max-width:440px;padding:32px;max-height:92vh;overflow:auto;animation:pop .24s var(--ease)}
.modal__card--wide{max-width:700px}
@keyframes pop{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.modal__x{float:right;background:none;border:0;font-size:24px;color:var(--ink-3);cursor:pointer;line-height:1;margin:-6px -6px 0 0}
.modal h3{font-size:24px;font-weight:700;letter-spacing:-.01em;margin-bottom:6px}
.modal .lead{color:var(--ink-2);font-size:14.5px;margin-bottom:22px}
.modal .gift{border:1px solid var(--rule);border-left:2px solid var(--ink);border-radius:2px;padding:11px 14px;font-size:13.5px;color:var(--ink);font-weight:700;margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:700;margin-bottom:8px}
.field input,.field textarea,.field select{width:100%;border:0;border-bottom:1px solid var(--ink-2);border-radius:0;font-size:16px;padding:10px 2px;background:transparent;transition:border-color .15s}
.field input:focus,.field textarea:focus{outline:none;border-bottom:2px solid var(--ink)}
.field .err{color:#000;font-size:12.5px;margin-top:6px;display:none;font-weight:700}
.field.invalid .err{display:block}.field.invalid input{border-bottom-color:#000}
.modal .switch{text-align:center;margin-top:18px;font-size:13.5px;color:var(--ink-2)}
.modal .switch a{color:var(--ink);font-weight:700;cursor:pointer;text-decoration:underline}
.modal .fineprint{text-align:center;color:var(--ink-3);font-size:12px;margin-top:14px}
.trailer-frame{position:relative;aspect-ratio:16/9;background:#000;overflow:hidden;display:flex;align-items:center;justify-content:center;color:#999;text-align:center}
.trailer-frame video,.trailer-frame iframe{width:100%;height:100%;border:0;object-fit:cover}

/* ----- 로그인 게이트 (A1 동일) ----- */
.gate{position:fixed;inset:0;z-index:1000;background:#fff;display:flex;align-items:center;justify-content:center;padding:24px}
html.sb-authed .gate{display:none}
.gate__card{width:100%;max-width:380px}
.gate__eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2)}
.gate__tri{margin:18px 0 16px}
.gate__tri span{display:block;background:var(--ink)}
.gate__tri span:nth-child(1){height:3px}.gate__tri span:nth-child(2){height:1.5px;margin:7px 0;width:55%}.gate__tri span:nth-child(3){height:3px}
.gate h1{font-size:26px;font-weight:700;margin-bottom:8px}
.gate .gsub{color:var(--ink-2);font-size:14px;margin-bottom:28px}
.gate__err{color:#000;font-weight:700;font-size:13px;margin-bottom:14px;min-height:0}.gate__err:empty{display:none}

/* 한글 제목 단어 단위 줄바꿈 */
.hero h1,.sec-h{word-break:keep-all}

/* 네 개의 숫자 — 4열 스텝 */
#fournum .steps3{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){#fournum .steps3{grid-template-columns:1fr 1fr}}
@media (max-width:560px){#fournum .steps3{grid-template-columns:1fr}}

/* ---------- 가치 사다리 (Value Ladder) ---------- */
.ladder{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;align-items:end;margin-top:44px}
.lstep{border:1px solid var(--rule);background:#fff;padding:24px 20px 20px;display:flex;flex-direction:column;position:relative}
.lstep .ln{font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--ink-3);text-transform:uppercase}
.lstep h3{font-size:18px;font-weight:700;letter-spacing:-.01em;margin:6px 0 2px}
.lstep .lp{font-size:15px;font-weight:700;border-bottom:1px solid var(--rule);padding-bottom:12px;margin-bottom:12px}
.lstep .lp small{font-weight:600;color:var(--ink-3);font-size:12px}
.lstep ul{list-style:none;margin:0 0 4px;padding:0}
.lstep li{position:relative;padding-left:14px;font-size:13px;color:var(--ink-2);margin-bottom:8px;line-height:1.5;word-break:keep-all}
.lstep li:before{content:"·";position:absolute;left:2px;font-weight:700;color:var(--ink)}
.lstep .btn{margin-top:12px;width:100%}
/* 계단식 상승 — 단이 오를수록 카드가 올라간다 (align-items:end 기준 margin-bottom으로 들어올림) */
.ladder .lstep:nth-child(1){margin-bottom:0}
.ladder .lstep:nth-child(2){margin-bottom:22px}
.ladder .lstep:nth-child(3){margin-bottom:44px}
.ladder .lstep:nth-child(4){margin-bottom:66px}
.ladder .lstep:nth-child(5){margin-bottom:88px}
.lstep--hi{border:2px solid var(--ink)}
.lstep--hi .ln{color:var(--ink)}
.ladder-note{margin-top:18px;font-size:12.5px;color:var(--ink-3)}
@media(max-width:900px){.ladder{grid-template-columns:1fr 1fr}.ladder .lstep{margin-top:0!important}}
@media(max-width:560px){.ladder{grid-template-columns:1fr}}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}