@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css");
@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Noto+Serif+KR:wght@400&display=swap");

:root{
  --bg:#ffffff;
  --ink:#141519;
  --ink-2:#3b3f4a;
  --gray:#6e7380;
  --gray-2:#9a9fab;
  --card:#f5f6f8;
  --line:#e6e8ee;

  /* glow (soft) */
  --mint:#9edcc4;
  --sand:#f6d98f;
  --slate:#b9c9ea;
  /* flat shapes (solid) */
  --green:#1f7a5c;
  --gold:#d9b34a;
  --blue:#3d5a9e;
  --clay:#d98c6b;

  --wrap:1040px;
  --r:20px;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --serif:"Noto Serif KR","Apple SD Gothic Neo",serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Malgun Gothic","맑은 고딕",system-ui,sans-serif;
  background:var(--bg);color:var(--ink);
  font-size:16px;line-height:1.7;
  word-break:keep-all;overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.sr{position:absolute;left:-9999px}
.skip{position:absolute;left:-9999px;top:0;background:#111;color:#fff;padding:10px 16px;z-index:200}
.skip:focus{left:0}
.center{text-align:center}

/* ── glow (horizon band, not a beam) ── */
.glow{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.glow i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.75}
.glow .g1{width:640px;height:420px;background:var(--mint);left:50%;bottom:-120px;transform:translateX(-95%)}
.glow .g2{width:720px;height:420px;background:var(--sand);left:50%;bottom:-160px;transform:translateX(-40%)}
.glow .g3{width:600px;height:400px;background:var(--slate);left:50%;bottom:-100px;transform:translateX(15%)}
.glow::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#fff 0%,rgba(255,255,255,0) 45%,rgba(255,255,255,0) 80%,#fff 100%)}

/* ── header ── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.8);-webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid rgba(20,21,25,.06)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;max-width:1180px}
.brand{display:flex;align-items:center;gap:10px}
.brand .mark{width:26px;height:26px;border-radius:6px;display:flex;align-items:center;justify-content:center;background:var(--green);color:#fff;font-family:var(--mono);font-size:11px;font-weight:500}
.brand .name{font-size:16.5px;font-weight:600;letter-spacing:-.02em}
.nav{display:flex;align-items:center;gap:4px}
.nav a{font-size:14.5px;font-weight:500;color:var(--ink-2);padding:7px 12px;border-radius:8px}
.nav a:hover{color:var(--ink);background:rgba(20,21,25,.05)}
.nav .cta{margin-left:8px;background:var(--ink);color:#fff;padding:8px 15px;border-radius:9px;font-weight:600}
.nav .cta:hover{background:#000;color:#fff}

/* ── buttons ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:11px;font-weight:600;font-size:15px;border:1px solid transparent;transition:background .15s,border-color .15s,transform .12s}
.btn:active{transform:translateY(1px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--card)}
.btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:34px}

/* ── typography ── */
.mono{font-family:var(--mono);font-size:12.5px;letter-spacing:.02em;color:var(--gray)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12.5px;letter-spacing:.02em;color:var(--gray);margin-bottom:22px}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--green)}
.eyebrow.b::before{background:var(--blue)}
.eyebrow.y::before{background:var(--gold)}
.eyebrow.c::before{background:var(--clay)}
.h-xl{margin:0;font-size:clamp(36px,5.2vw,58px);line-height:1.22;font-weight:400;letter-spacing:-.03em}
.h-lg{margin:0;font-size:clamp(28px,3.6vw,40px);line-height:1.3;font-weight:400;letter-spacing:-.025em}
.sub{margin:18px auto 0;max-width:520px;font-size:clamp(15px,1.3vw,17px);line-height:1.75;color:var(--ink-2)}
.serif{font-family:var(--serif);font-weight:400}

/* ── hero ── */
.hero{position:relative;padding:140px 0 150px;overflow:hidden}
.hero .wrap{position:relative;z-index:1}

/* ── sections ── */
.sec{padding:110px 0}
.sec-head{max-width:720px;margin:0 auto 48px}
.sec-tight{padding-top:0}

/* ── flow card: numbered steps in a soft card (달파 카드 + 워터셰드 번호) ── */
.flow{background:var(--card);border-radius:24px;padding:16px 40px;text-align:left}
.steps{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(4,1fr)}
.steps li{padding:30px 22px 34px 0;border-right:1px solid var(--line);margin-right:22px}
.steps li:last-child{border-right:0;margin-right:0}
.steps .n{font-family:var(--mono);font-size:12.5px;color:var(--gray);display:flex;align-items:center;gap:10px;margin-bottom:22px}
.steps .n::before{content:"";width:8px;height:8px;background:var(--green)}
.steps li:nth-child(2) .n::before{background:var(--gold)}
.steps li:nth-child(3) .n::before{background:var(--blue)}
.steps li:nth-child(4) .n::before{background:var(--clay)}
.steps h3{margin:0 0 6px;font-size:19px;font-weight:600;letter-spacing:-.02em}
.steps p{margin:0;font-size:14.5px;color:var(--gray);line-height:1.65}

/* ── service cards (달파 카드, 납작한 도형) ── */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{background:var(--card);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;text-align:left}
.card .vis{height:200px;position:relative;overflow:hidden;background:var(--card)}
.card .vis::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(20,21,25,.10) 1px,transparent 1.2px);background-size:12px 12px;opacity:.6}
.card .body{padding:24px 28px 30px}
.card .body .mono{display:block;margin-bottom:12px}
.card h3{margin:0 0 6px;font-size:19px;font-weight:600;letter-spacing:-.02em}
.card p{margin:0;font-size:15px;color:var(--gray)}
.shape{position:absolute}
/* v1: 세 겹 막대 (라이선스) */
.v1 .s1{left:50%;top:50%;transform:translate(-50%,-50%);width:180px;height:112px}
.v1 .s1 b{position:absolute;left:0;right:0;height:28px;border-radius:6px}
.v1 .s1 b:nth-child(1){top:0;background:var(--green);right:30px}
.v1 .s1 b:nth-child(2){top:42px;background:var(--gold);left:24px}
.v1 .s1 b:nth-child(3){top:84px;background:var(--blue);right:56px}
/* v2: 동심원 (구독·반복) */
.v2 .s1{left:50%;top:50%;transform:translate(-50%,-50%);width:120px;height:120px;border-radius:50%;background:var(--blue)}
.v2 .s2{left:50%;top:50%;transform:translate(-50%,-50%);width:84px;height:84px;border-radius:50%;background:var(--card)}
.v2 .s3{left:50%;top:50%;transform:translate(-50%,-50%);width:48px;height:48px;border-radius:50%;background:var(--gold)}
.v2 .s4{left:50%;top:50%;transform:translate(-50%,-50%);width:16px;height:16px;border-radius:50%;background:var(--card)}
/* v3: 격자 사각형 (기기·네트워크) */
.v3 .s1{left:50%;top:50%;transform:translate(-50%,-50%);width:132px;height:132px;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.v3 .s1 b{background:var(--slate);border-radius:5px}
.v3 .s1 b:nth-child(1){background:var(--green)}
.v3 .s1 b:nth-child(5){background:var(--blue)}
.v3 .s1 b:nth-child(9){background:var(--gold)}
/* v4: 4분원 (유지보수·순환) */
.v4 .s1{left:50%;top:50%;transform:translate(-50%,-50%);width:120px;height:120px;display:grid;grid-template-columns:1fr 1fr;gap:6px}
.v4 .s1 b{background:var(--clay)}
.v4 .s1 b:nth-child(1){border-radius:60px 0 0 0;background:var(--green)}
.v4 .s1 b:nth-child(2){border-radius:0 60px 0 0;background:var(--gold)}
.v4 .s1 b:nth-child(3){border-radius:0 0 0 60px;background:var(--blue)}
.v4 .s1 b:nth-child(4){border-radius:0 0 60px 0}

/* ── why: 세리프 인용 + 사실 목록 ── */
.quote{font-family:var(--serif);font-size:clamp(22px,2.6vw,30px);line-height:1.5;letter-spacing:-.01em;margin:22px auto 0;max-width:640px;color:var(--ink)}
.quote em{font-style:normal;color:var(--green)}
.facts{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:40px 0 0;padding:0;list-style:none}
.facts li{display:inline-flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:100px;padding:9px 18px 9px 14px;font-size:14px;color:var(--ink-2);background:#fff}
.facts li .mono{color:var(--gray-2)}
.facts li::before{content:"";width:8px;height:8px;background:var(--green)}
.facts li:nth-child(2)::before{background:var(--gold)}
.facts li:nth-child(3)::before{background:var(--blue)}

/* ── cta ── */
.cta{position:relative;padding:150px 0;overflow:hidden}
.cta .wrap{position:relative;z-index:1}
.cta .glow .g1{bottom:auto;top:-40px;transform:translateX(-85%)}
.cta .glow .g2{bottom:auto;top:-80px;transform:translateX(-45%)}
.cta .glow .g3{bottom:auto;top:-30px;transform:translateX(0)}
.cta .glow::after{background:linear-gradient(180deg,#fff 0%,rgba(255,255,255,0) 22%,rgba(255,255,255,0) 70%,#fff 100%)}

/* ── footer ── */
.site-footer{border-top:1px solid var(--line);padding:56px 0 48px;font-size:13.5px;color:var(--gray)}
.site-footer .wrap{max-width:1180px}
.f-top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:30px;border-bottom:1px solid var(--line);margin-bottom:24px}
.f-name{color:var(--ink);font-weight:600;font-size:15px;margin-bottom:12px}
.f-info{margin:0;padding:0;list-style:none;line-height:1.9}
.f-links{display:flex;gap:22px;flex-wrap:wrap;align-items:flex-start}
.f-links a{color:var(--ink-2)}
.f-links a:hover{color:var(--ink)}
.f-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:var(--mono);font-size:12px;color:var(--gray-2)}

/* ── floating widget ── */
.fab{position:fixed;right:22px;bottom:22px;z-index:90;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 44px 16px 18px;box-shadow:0 18px 44px -18px rgba(20,21,25,.3);max-width:320px}
.fab[hidden]{display:none}
.fab a{display:block}
.fab strong{display:block;font-size:14.5px;font-weight:600;margin-bottom:3px;letter-spacing:-.01em}
.fab span{display:block;font-size:13px;color:var(--gray)}
.fab button{position:absolute;right:10px;top:10px;width:26px;height:26px;border:0;background:transparent;color:var(--gray-2);font-size:18px;line-height:1;cursor:pointer;border-radius:6px}
.fab button:hover{background:var(--card);color:var(--ink)}

/* ── doc pages ── */
.page-head{position:relative;padding:86px 0 64px;overflow:hidden}
.page-head .wrap{position:relative;z-index:1}
.page-head .glow i{opacity:.4}
.page-head h1{margin:0;font-size:clamp(30px,4vw,44px);font-weight:400;letter-spacing:-.03em}
.page-head p{margin:14px auto 0;color:var(--ink-2);max-width:600px}
.crumb{font-family:var(--mono);font-size:12.5px;color:var(--gray-2);margin:0 0 16px}
.crumb a:hover{color:var(--gray)}

.doc{padding:56px 0 110px}
.doc .wrap{max-width:820px}
.doc h2{font-size:18px;font-weight:600;letter-spacing:-.02em;margin:40px 0 12px}
.doc h2:first-child{margin-top:0}
.doc p{margin:0 0 16px;color:var(--ink-2)}
.doc ul,.doc ol{margin:0 0 16px;padding-left:22px;color:var(--ink-2)}
.doc li{margin-bottom:8px}
.doc table{width:100%;border-collapse:collapse;margin:0 0 22px;border-top:1px solid var(--ink)}
.doc table th,.doc table td{border-bottom:1px solid var(--line);padding:13px 14px;font-size:15px;text-align:left;vertical-align:top}
.doc table th{background:var(--card);width:180px;font-weight:500;color:var(--gray)}
.doc a:not(.btn){color:var(--green);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(31,122,92,.35)}
.doc .board a,.doc .crumb a{text-decoration:none;color:inherit}

.callout{background:var(--card);border-radius:16px;padding:20px 22px;margin:0 0 32px;font-size:14.5px;color:var(--ink-2);line-height:1.72}
.callout strong{color:var(--ink);display:block;margin-bottom:6px;font-size:15px;font-weight:600}

.board{width:100%;border-collapse:collapse;border-top:1px solid var(--ink)}
.board th,.board td{border-bottom:1px solid var(--line);padding:17px 14px;font-size:15px}
.board th{background:var(--card);font-family:var(--mono);font-weight:500;color:var(--gray);text-align:center;font-size:12.5px;letter-spacing:.02em}
.board td{text-align:center;color:var(--gray);font-family:var(--mono);font-size:13.5px}
.board th.subject,.board td.subject{text-align:left}
.board td.subject{color:var(--ink);font-family:inherit;font-size:15px}
.board td.subject a{font-weight:500}
.board td.subject a:hover{text-decoration:underline;text-underline-offset:3px}
.search{padding:10px 14px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:14.5px;min-width:210px;background:#fff}
.search:focus{outline:2px solid var(--green);outline-offset:1px;border-color:transparent}

.notice-head{border-top:1px solid var(--ink);padding:26px 0 22px;border-bottom:1px solid var(--line);margin-bottom:38px}
.notice-meta{display:flex;flex-wrap:wrap;gap:8px 24px;font-family:var(--mono);font-size:12.5px;color:var(--gray);margin:0}
.notice-meta strong{font-weight:500;color:var(--ink)}
.sign{margin-top:52px;text-align:center;line-height:2.05;color:var(--ink)}
.sign .date{color:var(--gray);font-size:15px}
.sign .co{font-size:18px;font-weight:600;letter-spacing:-.02em}

.two{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.dl{width:100%;border-collapse:collapse;border-top:1px solid var(--ink)}
.dl th,.dl td{border-bottom:1px solid var(--line);padding:15px 4px;text-align:left;font-size:15px;vertical-align:top}
.dl th{width:96px;font-weight:500;color:var(--gray)}
.mini{background:var(--card);border-radius:16px;padding:22px 24px;margin-bottom:12px}
.mini h3{margin:0 0 6px;font-size:16px;font-weight:600;letter-spacing:-.01em}
.mini p{margin:0;font-size:14.5px;color:var(--gray)}

/* ── reveal ── */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}}

/* ── responsive ── */
@media (max-width:900px){
  .steps{grid-template-columns:1fr 1fr}
  .steps li{border-right:0;margin-right:0;padding:22px 0;border-bottom:1px solid var(--line)}
  .steps li:nth-child(odd){padding-right:22px;border-right:1px solid var(--line);margin-right:22px}
  .steps li:nth-last-child(-n+2){border-bottom:0}
  .flow{padding:8px 24px}
  .two{grid-template-columns:1fr;gap:40px}
}
@media (max-width:640px){
  .hero{padding:90px 0 100px}
  .sec{padding:80px 0}
  .cta{padding:110px 0}
  .cards{grid-template-columns:1fr}
  .card .vis{height:170px}
  .btns .btn{flex:1 1 100%}
  .steps{grid-template-columns:1fr}
  .steps li,.steps li:nth-child(odd){border-right:0;margin-right:0;padding-right:0;border-bottom:1px solid var(--line)}
  .steps li:last-child{border-bottom:0}
  .site-header .wrap{min-height:58px}
  .nav a{padding:7px 8px;font-size:13.5px}
  .nav .cta{margin-left:2px;padding:7px 12px}
  .nav a.hide-m{display:none}
  .board th:nth-child(1),.board td:nth-child(1),.board th:nth-child(4),.board td:nth-child(4){display:none}
  .doc table th{width:110px}
  .page-head{padding:60px 0 44px}
  .fab{left:16px;right:16px;max-width:none}
  .glow i{filter:blur(70px)}
}