/* TYPE 공통 스타일 — 모든 페이지가 이 파일 하나를 쓴다 */
:root{
  --bg:#FFFFFF; --bg-2:#F6F7F9; --ink:#111214; --ink-2:#4B4F57; --ink-3:#868B94; --line:#ECEDF0;
  --blue:#4F6BFF; --blue-ink:#3A54E0; --blue-soft:#EEF1FF;
  --cv-a1:#DCE3FF; --cv-a2:#F3F5FF; --cv-b1:#E2EEFB; --cv-b2:#F6FAFE; --cv-c1:#E9E4FF; --cv-c2:#F7F5FF;
  --sans:"Pretendard Variable",Pretendard,"Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0E0F12; --bg-2:#16181D; --ink:#F2F3F5; --ink-2:#B4B8C1; --ink-3:#7F8490; --line:#23262D;
  --blue:#7088FF; --blue-ink:#8C9FFF; --blue-soft:#1B2140;
  --cv-a1:#1E2650; --cv-a2:#14182C; --cv-b1:#16283A; --cv-b2:#121A24; --cv-c1:#251F45; --cv-c2:#16142A; color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0E0F12; --bg-2:#16181D; --ink:#F2F3F5; --ink-2:#B4B8C1; --ink-3:#7F8490; --line:#23262D; --blue:#7088FF; --blue-ink:#8C9FFF; --blue-soft:#1B2140; --cv-a1:#1E2650; --cv-a2:#14182C; --cv-b1:#16283A; --cv-b2:#121A24; --cv-c1:#251F45; --cv-c2:#16142A; color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;word-break:keep-all;overflow-wrap:anywhere}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px}
h1,h2,h3{margin:0;letter-spacing:-.02em;color:var(--ink);text-wrap:balance}
p{margin:0;color:var(--ink-2)}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:var(--bg);padding:8px 14px;border-radius:8px;z-index:30}
.skip:focus{left:12px}

.container{max-width:1080px;margin:0 auto;padding-inline:20px}
.narrow{max-width:720px;margin:0 auto;padding-inline:20px}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px)}
.site-nav{max-width:1200px;margin:0 auto;padding:0 20px;height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}
.site-nav .links{display:flex;gap:28px;font-size:14px;font-weight:500}
.site-nav .links a{color:var(--ink-2);padding-block:6px}
.site-nav .links a:hover,.site-nav .links a[aria-current="page"]{color:var(--ink)}
.site-nav .right{justify-self:end}
.logo{height:20px;width:auto}
.logo-dark{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .logo-light{display:none}:root:not([data-theme="light"]) .logo-dark{display:block}}
:root[data-theme="dark"] .logo-light{display:none}:root[data-theme="dark"] .logo-dark{display:block}
.review{background:#FFF6E5;color:#7A4A00;font-size:13px;text-align:center;padding:8px 20px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 18px;border-radius:10px;font-size:14px;font-weight:600;background:var(--ink);color:var(--bg)}
.btn:hover{opacity:.86}
.btn.sm{height:34px;padding:0 14px;font-size:13px;border-radius:9px}
.btn.light{background:var(--bg-2);color:var(--ink)}
.link{font-size:14px;font-weight:600;color:var(--ink-2)}
.link:hover{color:var(--ink)}
.row{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center}

/* hero */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(60% 80% at 85% 10%,var(--cv-c1) 0%,transparent 60%),
  radial-gradient(70% 90% at 10% 100%,var(--cv-a1) 0%,transparent 65%),
  var(--bg)}
.hero .container{padding-block:120px 104px;display:grid;gap:22px}
.hero h1{font-size:clamp(36px,6vw,64px);font-weight:700;line-height:1.18;letter-spacing:-.035em}
.hero h1 .dot{color:var(--blue)}
.hero p{font-size:clamp(16px,1.6vw,19px);max-width:560px;line-height:1.65}
.hero .row{margin-top:10px}

/* sections */
.section{padding-block:88px 8px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:28px}
.section-head h2{font-size:clamp(24px,3vw,30px);font-weight:700}
.eyebrow{font-size:14px;font-weight:600;color:var(--blue-ink)}

/* covers (CSS only, no stock imagery) */
.cover{position:relative;aspect-ratio:16/9;border-radius:16px;overflow:hidden;display:grid;place-items:center;padding:24px;
  background:linear-gradient(135deg,var(--c1) 0%,var(--c2) 70%)}
.cover::after{content:"";position:absolute;inset:0;background:repeating-linear-gradient(115deg,transparent 0 22px,color-mix(in srgb,var(--bg) 35%,transparent) 22px 23px);opacity:.5;pointer-events:none}
.cover.a{--c1:var(--cv-a1);--c2:var(--cv-a2)} .cover.b{--c1:var(--cv-b1);--c2:var(--cv-b2)} .cover.c{--c1:var(--cv-c1);--c2:var(--cv-c2)}
.cover-in{position:relative;z-index:1;display:grid;gap:10px;justify-items:center;text-align:center;max-width:80%}
.cover-in .logo{height:16px;opacity:.85}
.cover-in strong{font-size:clamp(16px,2.2vw,24px);font-weight:700;letter-spacing:-.02em;line-height:1.35;color:var(--ink)}
.cover.lg{aspect-ratio:2/1;max-height:360px;width:100%;border-radius:20px}
.cover.lg .cover-in strong{font-size:clamp(20px,3vw,34px)}

/* tiles */
.feature{display:grid;gap:18px}
.feature h3{font-size:clamp(20px,2.4vw,28px);font-weight:700;line-height:1.4}
.feature:hover h3,.tile:hover h3{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:40px 24px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:40px 24px}
.tile{display:grid;gap:14px;align-content:start}
.tile h3{font-size:18px;font-weight:600;line-height:1.45}
.tile p{font-size:15px}
.meta{font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center}
.meta .sep{width:1px;height:10px;background:var(--line)}
.status{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--ink-2)}
.status::before{content:"";width:7px;height:7px;border-radius:50%;background:#F5A524}
.empty{padding:40px 0;color:var(--ink-3)}

/* page head */
.page-head{padding-block:72px 40px;display:grid;gap:14px}
.page-head h1{font-size:clamp(30px,4.4vw,44px);font-weight:700;line-height:1.3}
.page-head .lead{font-size:18px;line-height:1.65}
.crumb{font-size:14px;color:var(--ink-3)}
.crumb a:hover{color:var(--ink)}

/* prose (article, research, service body) */
.prose{display:grid;gap:18px;font-size:17px;line-height:1.85}
.prose h2{font-size:22px;font-weight:700;line-height:1.45;margin-top:28px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:18px;font-weight:600;margin-top:12px}
.prose a{color:var(--blue-ink);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{margin:4px 0;padding:2px 0 2px 18px;border-left:3px solid var(--ink);color:var(--ink);font-weight:500}
.prose ul,.prose ol{margin:0;padding-left:22px;color:var(--ink-2);display:grid;gap:6px}
.prose sup{font-size:11px;color:var(--ink-3)}
.box{background:var(--bg-2);border-radius:14px;padding:22px 24px;display:grid;gap:10px}
.box .k{font-size:13px;font-weight:600;color:var(--ink-3)}
.facts{display:grid;grid-template-columns:max-content 1fr;gap:8px 24px;font-size:15px;margin:0}
.facts dt{color:var(--ink-3)}
.facts dd{margin:0;color:var(--ink)}
.evidence{display:grid;gap:8px;font-size:14px}
.evidence div{display:grid;grid-template-columns:44px 1fr;gap:10px}
.evidence b{font-weight:600;color:var(--ink)}
.refs{font-size:14px;color:var(--ink-3);padding-left:20px;display:grid;gap:6px;margin:0}
.refs a{color:var(--ink-3)}
.byline{display:flex;gap:14px;align-items:center;padding-top:28px;border-top:1px solid var(--line)}
.byline .av{flex:none;width:44px;height:44px;min-width:44px;aspect-ratio:1;border-radius:50%;background:var(--blue-soft);color:var(--blue-ink);display:grid;place-items:center;font-weight:700}
.byline p{font-size:14px}
.service-note{background:var(--blue-soft);border-radius:14px;padding:20px 22px;display:grid;gap:6px}
.service-note p{color:var(--ink);font-size:15px}
.service-note a{font-size:14px;font-weight:600;color:var(--blue-ink);text-decoration:none}
.steps{counter-reset:s;display:grid;gap:0}
.steps li{list-style:none;display:grid;grid-template-columns:40px 1fr;gap:4px 12px;padding:18px 0;border-top:1px solid var(--line)}
.steps li::before{counter-increment:s;content:counter(s,decimal-leading-zero);font-weight:700;color:var(--blue-ink);font-size:15px;grid-row:span 2}
.steps b{color:var(--ink);font-weight:600}
.steps span{color:var(--ink-2);font-size:15px}
.prose ol.steps{padding:0}

/* cta band */
.band{margin-top:96px;background:var(--bg-2)}
.band .container{padding-block:64px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.band h2{font-size:clamp(22px,2.8vw,28px);font-weight:700}
.band p{margin-top:6px}

/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.contact-card{background:var(--bg-2);border-radius:16px;padding:28px;display:grid;gap:10px;align-content:start}
.contact-card h3{font-size:20px;font-weight:700}
.contact-card a.mail{font-weight:600;color:var(--blue-ink)}

/* footer */
.site-footer{margin-top:0;border-top:1px solid var(--line)}
.site-footer .container{padding-block:40px 48px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center;font-size:13px;color:var(--ink-3)}
.site-footer nav{display:flex;gap:20px;flex-wrap:wrap}
.site-footer a:hover{color:var(--ink)}
main{min-height:60vh}
main > :last-child:not(.band){margin-bottom:96px}

@media (max-width:860px){
  .grid3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .site-nav{grid-template-columns:auto 1fr;height:auto;padding-block:12px;row-gap:6px}
  .site-nav .links{grid-column:1/-1;grid-row:2;gap:22px;overflow-x:auto}
  .site-nav .right{grid-column:2;grid-row:1}
  .grid3,.grid2,.contact-grid{grid-template-columns:1fr}
  .hero .container{padding-block:72px 64px}
  .section{padding-block:64px 0}
  .cover.lg{aspect-ratio:16/10}
  .page-head{padding-block:48px 28px}
  .prose{font-size:16px}
}

/* research reading aids */
.toc{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:14px;margin-top:8px;padding-top:16px;border-top:1px solid var(--line)}
.toc a{color:var(--ink-2)}
.toc a:hover{color:var(--ink)}
.prose h2[id]{scroll-margin-top:84px}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.prose table{width:100%;border-collapse:collapse;font-size:14px;line-height:1.6;min-width:520px}
.prose th,.prose td{text-align:left;vertical-align:top;padding:12px 14px;border-bottom:1px solid var(--line)}
.prose th{font-weight:600;color:var(--ink-3);font-size:13px;border-bottom-color:var(--ink-3)}
.prose td{color:var(--ink-2)}
.prose td b{color:var(--ink)}
.box ul{font-size:15px}
@media (max-width:640px){
  .prose table{min-width:0;font-size:15px}
  .prose thead{display:none}
  .prose tr{display:block;padding:14px 0;border-bottom:1px solid var(--line)}
  .prose td{display:block;border:0;padding:3px 0}
  .prose td:first-child{color:var(--ink);font-weight:600}
  .prose td:not(:first-child)::before{content:attr(data-label);display:block;font-size:12px;color:var(--ink-3);margin-top:4px}
}

/* home: research first */
.hero .eyebrow{margin-bottom:-6px}
.hero .tagline{font-size:14px;color:var(--ink-3);margin-top:6px}
.research-home{display:grid;grid-template-columns:1.1fr 1fr;gap:40px 56px;align-items:start}
.rh-main{display:grid;gap:12px}
.rh-main h3{font-size:clamp(22px,2.6vw,28px);font-weight:700;line-height:1.4}
.rh-main .q{margin:12px 0 0;padding:4px 0 4px 18px;border-left:3px solid var(--ink);color:var(--ink);font-weight:500;font-size:17px;line-height:1.7}
.points{list-style:none;margin:0;padding:0;display:grid;gap:0;counter-reset:p}
.points li{padding:18px 0;border-top:1px solid var(--line);display:grid;gap:6px}
.points li:first-child{border-top:0;padding-top:4px}
.points b{font-size:16px;font-weight:600}
.points p{font-size:15px}
.svc-mini{display:grid;gap:8px;padding:28px;border-radius:16px;background:var(--bg-2);max-width:720px}
.svc-mini b{font-size:20px;font-weight:700;color:var(--ink)}
.svc-mini span:not(.eyebrow):not(.link){color:var(--ink-2);font-size:15px}
.svc-mini:hover b{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.contact-grid{grid-template-columns:repeat(3,1fr)}
@media (max-width:860px){.research-home{grid-template-columns:1fr}.contact-grid{grid-template-columns:1fr}}

/* figure + citations */
.fig{margin:12px 0;display:grid;gap:10px}
.fig svg{width:100%;height:auto;font-family:var(--sans)}
.fig .fig-tall{display:none;max-width:380px;margin:0 auto}
.fig .t-l{font-size:22px;font-weight:700;fill:var(--ink)}
.fig .t-m{font-size:15px;fill:var(--ink-2)}
.fig .t-s{font-size:13px;font-weight:600;fill:var(--ink-3)}
.fig figcaption{font-size:13px;color:var(--ink-3);line-height:1.6}
.prose sup a.cite{color:var(--ink-3);text-decoration:none}
.prose sup a.cite:hover{color:var(--blue-ink)}
.refs li{scroll-margin-top:84px}
.refs li:target{background:var(--blue-soft);border-radius:6px}
@media (max-width:640px){.fig .fig-wide{display:none}.fig .fig-tall{display:block}}

/* case comparison */
.case{display:grid;gap:14px}
.case-step{background:var(--bg-2);border-radius:14px;padding:20px 22px;display:grid;gap:10px}
.case-step .k{font-size:14px;font-weight:700;color:var(--ink)}
.case-step dl{margin:0;display:grid;grid-template-columns:118px 1fr;gap:8px 16px;font-size:15px;line-height:1.65}
.case-step dt{color:var(--ink-3);font-weight:600}
.case-step dd{margin:0;color:var(--ink-2)}
.case-step dt:nth-last-of-type(1),.case-step dd:last-of-type{color:var(--ink)}
@media (max-width:640px){.case-step dl{grid-template-columns:1fr;gap:2px}.case-step dd{margin-bottom:8px}}

/* research: single case flow */
.page-note{margin-bottom:8px}
.page-note p{font-size:15px}
.note{font-size:14px;color:var(--ink-3)}
.prose ol.flow{list-style:none;padding:0;margin:0;display:grid;gap:0;counter-reset:f}
.flow li{position:relative;padding:4px 0 22px 34px;display:grid;gap:6px}
.flow li::before{counter-increment:f;content:counter(f);position:absolute;left:0;top:4px;width:22px;height:22px;border-radius:50%;background:var(--ink);color:var(--bg);font-size:12px;font-weight:700;display:grid;place-items:center}
.flow li::after{content:"";position:absolute;left:10.5px;top:30px;bottom:4px;width:1px;background:var(--line)}
.flow li:last-child::after{display:none}
.flow .k{font-size:14px;font-weight:700;color:var(--ink)}
.flow p{font-size:16px}
.ref-note{color:var(--ink-2);font-size:13px}