:root{
  --ink:#17191f; --ink2:#4a4f5a; --muted:#7b808a; --line:#e6e3dd;
  --paper:#ffffff; --warm:#f7f4ef; --warm2:#efe9e0;
  --accent:#d9480f; --accent-soft:#fdebe1; --deep:#1f2a3a; --teal:#0e6e66; --teal-soft:#e2f1ef; --olive-soft:#eef0df;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Pretendard,-apple-system,"Apple SD Gothic Neo",sans-serif;color:var(--ink);background:var(--paper);word-break:keep-all;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
/* top bar */
.util{border-bottom:1px solid var(--line);font-size:12.5px;color:var(--muted)}
.util .wrap{display:flex;justify-content:space-between;align-items:center;height:34px}
.util nav a{margin-left:16px}
/* header */
header{position:sticky;top:0;background:#fff;z-index:10;border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;height:64px;gap:28px}
.logo{display:flex;align-items:baseline;gap:6px;font-weight:800;font-size:21px;letter-spacing:-.5px}
.logo b{color:var(--accent)}
.logo small{font-size:11.5px;font-weight:600;color:var(--muted);letter-spacing:0}
.gnb{display:flex;gap:22px;font-size:15px;font-weight:600;color:var(--ink2);margin-left:auto}
.gnb a:hover{color:var(--accent)}
.search-ico{font-size:13.5px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:6px 14px;margin-left:8px}
/* featured */
.feat{padding:32px 0 10px}
.feat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.fc{position:relative;display:flex;flex-direction:column;min-height:240px;padding:26px 26px 24px;border-radius:4px;border:1px solid transparent;transition:border-color .15s}
.fc:hover{border-color:var(--ink)}
.fc.c1{background:#eef1f5}.fc.c2{background:#f4f1ec}.fc.c3{background:#edf2ef}
.fc .cat{font-size:12.5px;font-weight:700;color:var(--accent)}
.fc h2{font-size:22px;line-height:1.38;letter-spacing:-.6px;font-weight:800;margin-top:10px}
.fc p{font-size:13.5px;color:var(--ink2);margin-top:8px;max-width:calc(100% - 132px)}
.fc .ico{position:absolute;right:22px;bottom:22px;line-height:0}
.pager{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:16px;font-size:12.5px;color:var(--muted)}
.pager span{width:26px;height:26px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center}
/* topics */
.topics{padding:26px 0 34px}
.topics ul{list-style:none;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.topics li{padding:18px 8px 16px;text-align:center;border-right:1px solid var(--line)}
.topics li:last-child{border-right:0}
.topics svg{display:block;margin:0 auto 10px;color:var(--deep)}
.topics li:hover svg{color:var(--accent)}
.topics b{display:block;font-size:14.5px}
.topics small{display:block;font-size:12px;color:var(--muted);margin-top:2px}
/* finder */
.finder{background:var(--warm);border-radius:6px;padding:34px 30px 28px;text-align:center}
.finder h2{font-size:23px;letter-spacing:-.5px}
.finder p{color:var(--ink2);font-size:14px;margin-top:6px}
.fbox{display:flex;max-width:640px;margin:20px auto 0;border:2px solid var(--deep);border-radius:6px;overflow:hidden;background:#fff}
.fbox select{border:0;border-right:1px solid var(--line);padding:0 14px;font:inherit;font-weight:700;font-size:14.5px;background:#fff;width:150px}
.fbox input{flex:1;border:0;padding:15px 14px;font:inherit;font-size:14.5px;min-width:0}
.fbox button{border:0;background:var(--deep);color:#fff;font:inherit;font-weight:700;padding:0 24px}
.tags{margin-top:14px;display:flex;flex-wrap:wrap;justify-content:center;gap:7px;font-size:13px}
.tags a{background:#fff;border:1px solid var(--warm2);border-radius:999px;padding:5px 12px;color:var(--ink2)}
/* steps */
.steps{padding:52px 0 8px}
.sec-h{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:18px}
.sec-h h2{font-size:22px;letter-spacing:-.5px}
.sec-h a{font-size:13px;color:var(--muted)}
.steps ol{list-style:none;counter-reset:s;display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-left:3px solid var(--accent)}
.steps li{counter-increment:s;padding:4px 18px 4px 16px;border-right:1px solid var(--line)}
.steps li:last-child{border-right:0}
.steps li::before{content:counter(s,decimal-leading-zero);display:block;font-weight:800;font-size:13px;color:var(--accent);margin-bottom:6px;font-variant-numeric:tabular-nums}
.steps li b{font-size:15px;line-height:1.45;display:block}
.steps li small{display:block;margin-top:6px;font-size:12.5px;color:var(--muted);line-height:1.5}
/* popular */
.popular{padding:52px 0}
.pop-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.post .thumb{height:132px;border-radius:5px;display:flex;align-items:flex-end;padding:16px;font-weight:800;font-size:20px;letter-spacing:-.6px;line-height:1.25}
.t1{background:var(--deep);color:#fff}.t2{background:#f4f1ec;color:var(--ink)}.t3{background:#eef1f5;color:var(--ink)}.t4{background:#edf2ef;color:var(--ink)}
.post .cat{margin-top:12px;font-size:12px;font-weight:700;color:var(--accent)}
.post h3{font-size:16px;line-height:1.42;margin-top:4px;letter-spacing:-.3px}
.post p{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5}
/* two col */
.twocol{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:8px 0 56px}
.list h2{font-size:20px;letter-spacing:-.4px;margin-bottom:6px}
.list li{list-style:none;border-bottom:1px solid var(--line);padding:14px 0;display:flex;gap:14px;align-items:baseline}
.list .k{flex:0 0 74px;font-size:12.5px;font-weight:700;color:var(--teal)}
.list .t{font-size:15px;font-weight:600;line-height:1.45}
.list .d{margin-left:auto;font-size:12px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
/* footer */
footer{background:var(--deep);color:#aab3c2;font-size:13px}
footer .wrap{padding:34px 20px 40px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer .logo{color:#fff;font-size:18px}
footer nav a{margin-right:16px}
footer p{margin-top:10px;max-width:34em;line-height:1.6}
@media (max-width:860px){
  .gnb,.search-ico{display:none}
  .feat-grid{grid-template-columns:minmax(0,1fr);gap:12px}
  .fc{min-height:0;padding:22px 20px}
  .fc .ico{right:16px;bottom:16px}
  .fc .ico svg{width:92px;height:61px}
  .fc p{max-width:60%}
  .util span{display:none}
  .sec-h a{display:none}
  .sec-h h2{font-size:20px}
  .topics ul{grid-template-columns:repeat(3,minmax(0,1fr))}
  .topics li:nth-child(3){border-right:0}
  .topics li:nth-child(-n+3){border-bottom:1px solid var(--line)}
  .steps ol{grid-template-columns:1fr;border-left:3px solid var(--accent)}
  .steps li{border-right:0;border-bottom:1px solid var(--line);padding:12px 14px}
  .pop-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .post .thumb{height:104px;font-size:17px}
  .twocol{grid-template-columns:minmax(0,1fr)}
  .twocol{grid-template-columns:1fr;gap:28px}
  .fbox{flex-wrap:wrap}.fbox select{width:100%;border-right:0;border-bottom:1px solid var(--line);height:46px}
  .fbox button{width:100%;padding:13px}
  .list .k{flex-basis:62px}
}

.art-wrap{padding-top:18px}
.crumb{font-size:12.5px;color:var(--muted);display:flex;gap:7px;align-items:center}
.art-grid{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:56px;margin-top:18px}
.art{max-width:720px}
.art-head{border-bottom:1px solid var(--line);padding-bottom:26px;text-align:center}
.art-head h1{max-width:20em;margin-left:auto;margin-right:auto}
.art-head .dek{max-width:34em;margin-left:auto;margin-right:auto}
.art-head .byline{justify-content:center}
.art-head .cat{font-size:13px;font-weight:700;color:var(--accent)}
.art-head h1{font-size:34px;line-height:1.32;letter-spacing:-1px;font-weight:800;margin-top:10px}
.dek{font-size:17px;color:var(--ink2);margin-top:12px;line-height:1.6}
.byline{margin-top:16px;display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12.5px;color:var(--muted)}
.byline span:first-child{color:var(--ink);font-weight:700}
.art section{margin-top:40px}
.art p{font-size:16.5px;line-height:1.85;color:#262a31;margin-top:12px}
.art a{color:var(--teal);text-decoration:underline;text-underline-offset:3px}
.no{display:block;font-size:12px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.5px}
.art h2{font-size:24px;line-height:1.38;letter-spacing:-.6px;margin-top:4px}
.tbl{overflow-x:auto;margin-top:16px;border-top:2px solid var(--ink)}
.tbl table{border-collapse:collapse;width:100%;min-width:620px;font-size:14px}
.tbl th,.tbl td{text-align:left;padding:12px 12px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.55}
.tbl thead th{font-size:12.5px;color:var(--muted);font-weight:700;background:#fafaf8}
.tbl tbody th{font-weight:800;white-space:nowrap}
.tbl tbody tr:first-child th{color:var(--accent)}
.art .note{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.6}
.fit{margin-top:16px;border-top:1px solid var(--line)}
.fit div{display:grid;grid-template-columns:96px minmax(0,1fr);gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.fit dt{font-size:13px;font-weight:800;color:var(--teal)}
.fit dd{font-size:16px;line-height:1.75}
.checks{margin-top:40px;border:1px solid var(--line);padding:22px 24px}
.checks h3{font-size:17px}
.checks ol{list-style:none;counter-reset:c;margin-top:10px}
.checks li{counter-increment:c;padding:12px 0 12px 34px;border-top:1px solid var(--line);position:relative;font-size:14.5px;color:var(--ink2);line-height:1.65}
.checks li:first-child{border-top:0}
.checks li::before{content:counter(c);position:absolute;left:0;top:12px;width:22px;height:22px;border-radius:50%;background:var(--deep);color:#fff;font-size:12px;font-weight:700;display:grid;place-items:center}
.checks li b{display:block;color:var(--ink);font-size:15.5px}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq details:first-of-type{border-top:2px solid var(--ink);margin-top:14px}
.faq summary{font-weight:700;font-size:16px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary::after{content:"+";color:var(--muted);font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq details p{font-size:15px;margin-top:8px}
.sources{border-top:1px solid var(--line);padding-top:18px}
.sources h3{font-size:14px;color:var(--ink2)}
.sources ul{list-style:none;margin-top:8px}
.sources li{font-size:13.5px;color:var(--muted);padding:4px 0}
.sources a{color:var(--ink);margin-right:8px}
.toc{position:sticky;top:88px;align-self:start;font-size:13.5px;border-left:2px solid var(--line);padding-left:16px}
.toc b{font-size:12.5px;color:var(--muted)}
.toc ol{list-style:none;margin-top:10px}
.toc li{padding:5px 0}
.toc li:first-child a{color:var(--accent);font-weight:700}
.related{padding:56px 0 64px;border-top:1px solid var(--line);margin-top:56px}
.pop-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:860px){
  .art-grid{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .art-head h1{font-size:26px}
  .dek{font-size:16px}
  .art h2{font-size:21px}
  .art p{font-size:16px}
  .fit div{grid-template-columns:minmax(0,1fr);gap:4px}
  .checks{padding:18px 16px}
  .pop-grid.three{grid-template-columns:minmax(0,1fr)}
}

.nw{white-space:nowrap}


.sum{background:#f6f7f9;border:1px solid var(--line);border-left:5px solid var(--deep);border-radius:6px;padding:22px 26px;margin-top:34px}
.sum .lab{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--deep);font-weight:800;margin:0 0 10px}
.sum .lab i{display:inline-block;width:17px;height:2px;background:var(--deep)}
.art .sum p{font-size:16px;line-height:1.9;margin-top:0}
.art .sum p.lab{font-size:13px;line-height:1.4}
@media (max-width:860px){.sum{padding:18px 18px}}

/* site build additions */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.steps li a{display:block;color:inherit}
.steps li a:hover b{color:var(--accent)}
.list .t{color:inherit}
.list a.t:hover{color:var(--accent)}
.post .thumb{position:relative;justify-content:space-between;align-items:flex-end;gap:8px}
.post .thumb span{position:relative;z-index:1}
.post .thumb svg{flex:0 0 auto;opacity:.95}
.post p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.art h3{font-size:19px;line-height:1.45;margin-top:28px;letter-spacing:-.3px}
.art .bul,.art .num{margin:12px 0 0 1.2em}
.art .bul li,.art .num li{font-size:16px;line-height:1.8;color:#262a31;margin-top:4px}
.art .tbl tbody th{white-space:normal;min-width:7em}
.art.page{max-width:760px;margin:0 auto;padding-bottom:64px}
.art.page h2{margin-top:36px}
.byline a{color:inherit}
.hub-wrap{padding:28px 20px 72px}
.hub-head{padding:18px 0 28px;border-bottom:1px solid var(--line);margin-bottom:28px}
.hub-head h1{font-size:30px;letter-spacing:-.8px}
.hub-head p{color:var(--ink2);margin-top:6px}
.hub-more{margin-top:32px;font-size:14px}
.hub-more a{color:var(--teal);text-decoration:underline}
.fbox.small{margin:0 0 20px;max-width:560px}
.fbox.small button{cursor:pointer}
.list.all ul{border-top:2px solid var(--ink)}
.copy{font-size:12.5px;margin-top:6px}
footer nav{display:flex;flex-wrap:wrap;gap:8px 16px}
footer nav a{margin-right:0}
@media (max-width:860px){
  .art .tbl{overflow:visible;border-top:0}
  .art .tbl table{min-width:0}
  .art .tbl thead{display:none}
  .art .tbl tr{display:block;margin:0 0 12px;border:1px solid var(--line);border-top:2px solid var(--ink)}
  .art .tbl th,.art .tbl td{display:block;border-bottom:1px solid var(--line);padding:10px 14px}
  .art .tbl tbody th{background:#fafaf8;color:var(--ink)}
  .art .tbl td::before{content:attr(data-label);display:block;font-size:12px;font-weight:700;color:var(--teal);margin-bottom:2px}
  .art .tbl tr td:last-child{border-bottom:0}
  .post .thumb svg{width:70px;height:46px}
  .hub-head h1{font-size:25px}
}
@media (max-width:860px){
  .fc h2{max-width:calc(100% - 96px)}
  .fc .ico svg{width:84px;height:56px}
}
.post .thumb.img{padding:0;height:auto;aspect-ratio:1200/630;overflow:hidden;background:#f7f4ef;display:block}
.post .thumb.img img{display:block;width:100%;height:100%;object-fit:cover}
@media (max-width:860px){.post .thumb.img{height:auto}}
/* sticky header offset for in-page anchors */
html{scroll-padding-top:84px}
.art section,.art [id]{scroll-margin-top:84px}
/* only the site header stays sticky; article title scrolls away */
.art-head{position:static}
/* AI service favicons on the GEO feature card */
.fc .ai-row{display:flex;gap:8px}
.fc .ai-row img{width:40px;height:40px;padding:7px;background:#fff;border:1px solid var(--line);border-radius:50%;object-fit:contain}
@media (max-width:860px){.fc .ico:has(.ai-row){position:static;margin-top:16px}.fc .ai-row{gap:6px}.fc .ai-row img{width:32px;height:32px;padding:5px}}