:root{--blue:#0046FF;--ink:#1a1d23;--body:#33363d;--sub:#6b7079;--line:#e6e8ec;--bg2:#f6f7f9;--l:#2bb7a6;--c:#b7a6e8;--r:#ef8aa6}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;color:var(--ink);background:#fff;word-break:keep-all;overflow-wrap:break-word}
a{color:inherit}
.gnb{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.gnb-in{max-width:1180px;margin:0 auto;height:60px;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:20px;letter-spacing:-.02em;text-decoration:none;font-weight:500;color:var(--ink)}
.logo b{color:var(--blue);font-weight:800}
.gnb nav a{margin-left:24px;font-size:15px;color:var(--sub);text-decoration:none}
.gnb nav a:hover{color:var(--ink)}
.layout{max-width:1180px;margin:0 auto;padding:56px 24px 96px;display:grid;grid-template-columns:64px minmax(0,744px) 260px;gap:0 40px;justify-content:center}
.rail{position:sticky;top:120px;align-self:start;display:flex;flex-direction:column;gap:12px}
.rail-btn{width:48px;height:48px;border:1px solid var(--line);border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:border-color .15s}
.rail-btn:hover{border-color:#c4c8d0}
.rail-btn svg{width:20px;height:20px;fill:none;stroke:#3a3f48;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.rail-toast{position:absolute;left:56px;top:12px;white-space:nowrap;font-size:13px;background:var(--ink);color:#fff;padding:6px 10px;border-radius:6px;opacity:0;transition:opacity .2s;pointer-events:none}
.rail-toast.on{opacity:1}
.cat,.post .cat{font-size:14px;color:var(--blue);font-weight:600;margin-bottom:14px}
.post h1{font-size:38px;line-height:1.38;font-weight:700;letter-spacing:-.025em}
.dek{margin-top:16px;font-size:18px;line-height:1.65;color:var(--sub)}
.meta{display:flex;align-items:center;gap:10px;margin-top:22px;padding-bottom:28px;border-bottom:1px solid var(--line);font-size:14px;color:var(--sub)}
.meta .by{display:flex;align-items:center;gap:8px;color:var(--ink)}
.av{width:26px;height:26px;border-radius:50%;background:var(--blue);color:#fff;font-style:normal;font-size:13px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}
.sep{width:1px;height:12px;background:var(--line)}
.note{margin:36px 0 32px;padding:4px 0 4px 20px;border-left:3px solid var(--ink);font-size:16px;line-height:1.85;color:var(--body)}
.video{margin:0 0 12px}
.ratio{position:relative;padding-top:56.25%;border-radius:12px;overflow:hidden;background:#000}
.ratio iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video figcaption{margin-top:10px;font-size:13px;color:var(--sub);text-align:center}
.post h2{font-size:25px;line-height:1.45;font-weight:700;letter-spacing:-.02em;margin:60px 0 18px;scroll-margin-top:90px}
.post p{font-size:17px;line-height:1.9;color:var(--body);margin-bottom:22px}
.post blockquote{margin:36px 0;padding:28px 32px;background:var(--bg2);border-radius:12px;font-size:20px;line-height:1.6;font-weight:600;color:var(--ink);letter-spacing:-.01em}
.post blockquote cite{display:block;margin-top:12px;font-size:14px;font-weight:400;font-style:normal;color:var(--sub)}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:8px 0 30px}
.facts div{border:1px solid var(--line);border-radius:12px;padding:18px 18px 16px}
.facts span{display:block;font-size:13px;color:var(--sub)}
.facts b{display:block;font-size:26px;font-weight:700;margin:6px 0 4px;letter-spacing:-.02em;color:var(--ink)}
.facts em{font-style:normal;font-size:13px;color:var(--sub)}
.lens{margin:72px 0 0;padding:32px;border:1px solid var(--line);border-radius:16px;scroll-margin-top:90px}
.lens-head h2{margin:0 0 6px}
.lens-head p{font-size:15px;color:var(--sub);margin:0 0 22px;line-height:1.6}
.bar{display:flex;height:12px;border-radius:999px;overflow:hidden;gap:3px}
.bar span{display:block;height:100%}
.bar.sm{height:8px}
.b-l{background:var(--l)}.b-c{background:var(--c)}.b-r{background:var(--r)}
.legend{list-style:none;display:flex;gap:22px;margin-top:14px;font-size:14px;color:var(--body)}
.legend li{display:flex;align-items:center;gap:7px}
.legend i,.col-h i{width:9px;height:9px;border-radius:50%;display:inline-block}
.d-l{background:var(--l)}.d-c{background:var(--c)}.d-r{background:var(--r)}
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.col{background:var(--bg2);border-radius:12px;padding:20px 18px}
.post .col-h{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink);margin:0 0 8px}
.post .col-s{font-size:14px;line-height:1.7;color:var(--body);margin:0 0 14px}
.col ul{list-style:none;border-top:1px solid #e3e5ea}
.col li{border-bottom:1px solid #e3e5ea}
.col li a{display:block;padding:11px 0;font-size:14px;line-height:1.55;text-decoration:none;color:var(--ink)}
.col li a:hover{color:var(--blue)}
.col li em{display:block;font-style:normal;font-size:12px;color:var(--sub);margin-bottom:2px}
.post .lens-foot{font-size:13px;line-height:1.7;color:var(--sub);margin:20px 0 0}
.refs{margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.refs h3{font-size:16px;margin-bottom:12px}
.refs ol{padding-left:20px}
.refs li{font-size:14px;line-height:1.8;color:var(--sub)}
.refs a{color:var(--sub)}
.refs a:hover{color:var(--blue)}
.endbox{margin-top:48px;padding:28px;border-radius:16px;background:var(--bg2)}
.post .end-k{font-weight:700;color:var(--ink);margin-bottom:6px;font-size:16px}
.endbox p{font-size:15px;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;height:44px;padding:0 20px;border-radius:10px;background:var(--blue);color:#fff;text-decoration:none;font-size:15px;font-weight:600}
.btn:hover{background:#003ad6}
.side{position:sticky;top:100px;align-self:start;display:flex;flex-direction:column;gap:16px}
.toc,.mini{border:1px solid var(--line);border-radius:14px;padding:20px}
.side-h{font-size:14px;font-weight:700;margin-bottom:12px}
.toc ol{list-style:none;counter-reset:t}
.toc li{counter-increment:t}
.toc a{display:flex;gap:10px;padding:7px 0;font-size:14px;line-height:1.5;color:var(--sub);text-decoration:none}
.toc a::before{content:counter(t);color:#b0b4bc;font-variant-numeric:tabular-nums;width:12px}
.toc a:hover,.toc a.on{color:var(--ink)}
.toc a.on::before{color:var(--blue)}
.mini-t{font-size:13px;color:var(--sub);margin-top:10px}
.foot{border-top:1px solid var(--line);background:var(--bg2)}
.foot-in{max-width:1180px;margin:0 auto;padding:28px 24px 40px;font-size:13px;line-height:1.8;color:var(--sub)}
.foot b{color:var(--ink)}
/* home */
.home{max-width:1080px;margin:0 auto;padding:64px 24px 96px}
.home-hero h1{font-size:44px;font-weight:700;letter-spacing:-.03em;line-height:1.3}
.home-hero h1 b{color:var(--blue)}
.home-hero p{margin-top:14px;font-size:18px;line-height:1.7;color:var(--sub);max-width:620px}
.list-h{margin:64px 0 18px;font-size:15px;font-weight:700;padding-bottom:14px;border-bottom:1px solid var(--line)}
.card{display:grid;grid-template-columns:360px 1fr;gap:32px;text-decoration:none;padding:24px 0;border-bottom:1px solid var(--line)}
.card-img{aspect-ratio:16/10;border-radius:12px;background:var(--blue);color:#fff;display:flex;flex-direction:column;justify-content:flex-end;padding:24px;overflow:hidden}
.card-img span{font-size:13px;opacity:.75}
.card-img b{font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1.3;margin-top:6px}
.card-tx .cat{margin-bottom:10px}
.card-tx h2{font-size:26px;line-height:1.4;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.card-tx p.d{margin-top:12px;font-size:16px;line-height:1.75;color:var(--body)}
.card-tx .m{margin-top:16px;font-size:13px;color:var(--sub)}
.card-tx .bar{margin-top:18px;max-width:280px;height:6px}
.card:hover h2{color:var(--blue)}
.about{max-width:744px;margin:0 auto;padding:64px 24px 96px}
.about h1{font-size:34px;font-weight:700;letter-spacing:-.02em;margin-bottom:24px}
.about p{font-size:17px;line-height:1.9;color:var(--body);margin-bottom:20px}
@media (max-width:1120px){.layout{grid-template-columns:minmax(0,744px);gap:0}.rail,.side{display:none}}
@media (max-width:720px){
.layout{padding:32px 20px 72px}
.post h1{font-size:28px}.dek{font-size:16px}
.post h2{font-size:21px;margin-top:48px}
.post p{font-size:16.5px;line-height:1.85}
.post blockquote{padding:22px;font-size:18px}
.facts,.cols{grid-template-columns:1fr}
.lens{padding:22px 18px}
.legend{flex-wrap:wrap;gap:10px 16px}
.home-hero h1{font-size:32px}
.card{grid-template-columns:1fr;gap:18px}
}
.yt{cursor:pointer}.yt img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.yt button{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:68px;height:48px;border:0;background:none;cursor:pointer}
.yt:hover button path:first-child{fill:#f00;fill-opacity:1}
.rail-btn svg.fill{fill:#3a3f48;stroke:none;width:18px;height:18px}