:root{--ink:#172b3b;--muted:#526272;--blue:#1649dc;--line:#dce2e8;--paper:#fff;--wash:#f4f7fb;--navy:#112a40;--orange:#a44516}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans KR",sans-serif;font-size:1rem;line-height:1.8;word-break:keep-all;overflow-wrap:anywhere}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}button,input{font:inherit}.wrap{width:min(1160px,calc(100% - 64px));margin:auto}.preview{background:var(--navy);color:#fff;font-size:.875rem;line-height:1.5;padding:7px 0}.preview .wrap{display:flex;justify-content:space-between;gap:16px}.masthead{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:25px 0;border-bottom:1px solid var(--ink)}.brand{font-size:1.4rem;font-weight:800;letter-spacing:-.05em;display:flex;gap:12px;align-items:center}.monogram{font-size:1rem;letter-spacing:-.07em;background:var(--ink);color:white;width:37px;height:37px;display:grid;place-items:center}.nav{display:flex;gap:28px;font-size:.9375rem;font-weight:600}.nav a[aria-current=page]{color:var(--blue)}.intro{display:grid;grid-template-columns:1.5fr 1fr;gap:60px;align-items:end;padding:62px 0 48px}.eyebrow{font-family:ui-monospace,SFMono-Regular,monospace;font-size:.8125rem;letter-spacing:.1em;font-weight:700;color:var(--blue);margin:0 0 16px}.intro h1{font-size:clamp(2.25rem,4.5vw,3.65rem);line-height:1.24;letter-spacing:-.065em;margin:0;font-weight:750}.intro p:not(.eyebrow){color:var(--muted);max-width:370px;margin:0;font-size:1.0625rem}.feature{display:grid;grid-template-columns:1.2fr 1fr;background:var(--wash);border-top:1px solid var(--line);border-bottom:1px solid var(--line);min-height:350px}.feature-copy{padding:40px 45px 40px 0}.tagline{font-size:.875rem;color:var(--muted);display:flex;gap:16px;margin-bottom:14px}.feature h2{font-size:clamp(1.7rem,2.7vw,2.3rem);line-height:1.45;letter-spacing:-.04em;margin:0 0 18px}.feature p{color:var(--muted);margin-bottom:24px}.text-link{color:var(--blue);font-weight:650;text-decoration:underline;text-underline-offset:5px}.experiment-visual{background:var(--navy);color:#fff;padding:36px;align-self:stretch;display:flex;flex-direction:column;justify-content:center;gap:22px}.experiment-visual .eyebrow{color:#9fbcff;margin:0}.request-line{font-family:ui-monospace,monospace;font-size:1.125rem;padding-bottom:20px;border-bottom:1px solid #496071}.response-lines{display:grid;gap:12px}.response-lines>div{display:flex;align-items:center;justify-content:space-between;gap:12px}.response-lines span{color:#cad6e5;font-size:.9375rem}.status{font-family:ui-monospace,monospace;font-size:1.55rem;letter-spacing:-.04em}.status-404{color:#aec7ff}.visual-note{font-size:.875rem;color:#bdcbda;margin:0}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin:58px 0 0;border-bottom:1px solid var(--ink);padding-bottom:15px}.section-heading h2{font-size:1.4rem;letter-spacing:-.03em;margin:0}.count{font-family:ui-monospace,monospace;font-size:.875rem;color:var(--muted)}.post-row{display:grid;grid-template-columns:65px 1fr 125px;gap:25px;padding:30px 0;border-bottom:1px solid var(--line)}.post-no{font-family:ui-monospace,monospace;color:#7b8da0;font-size:1.2rem}.post-row h3{font-size:1.35rem;line-height:1.5;letter-spacing:-.035em;margin:0 0 9px}.post-row p{margin:0;color:var(--muted);font-size:.9375rem;max-width:750px}.post-meta{font-size:.875rem;color:var(--muted);text-align:right}.post-meta a{display:block;color:var(--blue);font-weight:600;margin-bottom:4px}.end-note{margin:42px 0 70px;display:grid;grid-template-columns:1fr 2fr;gap:40px;padding:28px 30px;border-left:3px solid var(--blue);background:var(--wash)}.end-note h2{font-size:1.12rem;margin:0}.end-note p{margin:0;color:var(--muted);font-size:.9375rem}.footer{border-top:1px solid var(--ink);margin-top:70px;padding:30px 0 45px;display:flex;justify-content:space-between;gap:30px;font-size:.875rem;color:var(--muted)}.footer .links{display:flex;flex-wrap:wrap;gap:20px}.skip{position:absolute;left:12px;top:-100px;background:#fff;z-index:10;padding:10px}.skip:focus{top:12px}.article-layout{display:grid;grid-template-columns:minmax(0,780px) 230px;gap:70px;align-items:start;margin:48px 0 0}.article-header{padding-bottom:30px;border-bottom:1px solid var(--line)}.breadcrumb{font-size:.875rem;color:var(--muted);margin-bottom:20px}.article-header h1{font-size:clamp(2rem,3.8vw,3rem);line-height:1.4;letter-spacing:-.055em;margin:12px 0 22px}.deck{font-size:1.15rem;color:var(--muted);line-height:1.85}.byline{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:.875rem;color:var(--muted)}.article-body{font-size:1.0625rem;line-height:1.95}.article-body p{margin:23px 0}.article-body h2{font-size:1.5rem;line-height:1.5;margin:50px 0 16px;letter-spacing:-.035em;scroll-margin-top:24px}.article-body a,.prose a{color:var(--blue);text-decoration:underline;text-underline-offset:4px}.toc{position:sticky;top:25px;font-size:.875rem;border-top:3px solid var(--ink);padding-top:16px}.toc strong{display:block;margin-bottom:12px}.toc ol{padding-left:20px;margin:0}.toc li{padding:5px 0;color:var(--muted)}.lab-label{border-top:1px solid var(--line);margin-top:25px;padding-top:17px;color:var(--muted);line-height:1.7}.lab-label p{margin:6px 0}.table-scroll{overflow:auto;border:1px solid var(--line);margin:24px 0;max-width:100%}table{border-collapse:collapse;width:100%;font-size:.9375rem;line-height:1.75;text-align:left}th,td{padding:15px 17px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--wash);font-weight:650}tr:last-child td{border-bottom:0}caption{text-align:left;padding:15px 17px;background:var(--navy);color:#fff;font-size:.875rem}pre{background:#112a40;color:#e4edf8;padding:24px;overflow:auto;font-size:.875rem;line-height:1.85;border-radius:2px;max-width:100%;white-space:pre}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.note{background:var(--wash);border-left:3px solid #647b94;padding:20px 24px;font-size:.9375rem;color:var(--muted);margin:30px 0}.evidence{background:var(--wash);padding:25px 28px;margin-top:42px;border:1px solid var(--line)}.evidence h2{font-size:1.2rem;margin:0 0 12px}.evidence p{font-size:.9375rem;margin:10px 0}.evidence ul{padding-left:20px;font-size:.9375rem}.related{border-top:1px solid var(--ink);margin-top:48px;padding-top:20px}.related h2{margin:0 0 12px;font-size:1.2rem}.related a{display:block;padding:12px 0;border-bottom:1px solid var(--line);font-size:1rem}.prose{max-width:760px;margin:55px auto 80px}.prose h1{font-size:2.6rem;letter-spacing:-.05em;line-height:1.35;margin-bottom:25px}.prose h2{font-size:1.4rem;margin-top:40px}.prose p{margin:20px 0;line-height:1.95}.topic-header{padding:50px 0 10px}.topic-header h1{font-size:2.7rem;letter-spacing:-.05em;margin:0}.topic-header p{color:var(--muted)}
@media(max-width:850px){.wrap{width:calc(100% - 40px)}.intro{gap:25px;grid-template-columns:1fr;padding:40px 0 30px}.intro p:not(.eyebrow){max-width:570px}.article-layout{grid-template-columns:minmax(0,1fr);gap:25px}.toc{position:static;grid-row:1}.toc ol{display:flex;flex-wrap:wrap;gap:4px 25px}.toc .lab-label{display:none}.feature-copy{padding:30px 25px 30px 0}.experiment-visual{padding:25px}.post-row{grid-template-columns:40px 1fr;gap:15px}.post-meta{grid-column:2;display:flex;gap:15px;text-align:left}.post-meta a{margin:0}.end-note{grid-template-columns:1fr;gap:10px}.article-header h1{font-size:2.25rem}}
@media(max-width:560px){.wrap{width:calc(100% - 32px)}.masthead{padding:19px 0;align-items:flex-start;gap:14px}.brand{font-size:1.13rem;gap:8px}.monogram{width:30px;height:30px;font-size:.875rem}.nav{gap:14px;font-size:.875rem;padding-top:3px}.nav .optional{display:none}.preview .wrap span:last-child{display:none}.intro h1{font-size:2.3rem}.feature{grid-template-columns:1fr}.feature-copy{padding:26px 8px}.experiment-visual{padding:26px}.post-row h3{font-size:1.16rem}.post-row{padding:24px 0}.section-heading{margin-top:38px}.footer{flex-direction:column;gap:15px;margin-top:45px}.end-note{margin-bottom:40px;padding:22px}.article-layout{margin-top:30px}.article-header h1{font-size:2rem}.article-body{font-size:1rem}.article-body h2{font-size:1.3rem}.deck{font-size:1.0625rem}.prose h1{font-size:2.1rem}.evidence{padding:20px}pre{padding:18px}.toc ol{display:block}.table-scroll{font-size:.875rem}th,td{padding:12px;min-width:110px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.reading-guide .guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;padding:28px 0;border-bottom:1px solid var(--line)}.guide-grid h3{font-size:1.1rem;line-height:1.6;margin:0 0 12px}.guide-grid p{font-size:.9375rem;color:var(--muted);margin:0 0 16px}.guide-grid a{display:block;color:var(--blue);text-decoration:underline;text-underline-offset:4px;font-size:.9375rem;margin:9px 0}@media(max-width:850px){.reading-guide .guide-grid{grid-template-columns:1fr;gap:24px}.guide-grid>div+div{border-top:1px solid var(--line);padding-top:24px}}

.mobile-toc{display:none}@media(max-width:850px){.article-layout>.toc{display:none}.mobile-toc{display:block;border-bottom:1px solid var(--line);padding:16px 0;font-size:.9375rem}.mobile-toc summary{cursor:pointer;font-weight:650}.mobile-toc ol{padding-left:24px}.mobile-toc a{color:var(--blue)}}
.feature .experiment-visual .visual-note{color:#bdcbda}

.topic-nav{display:flex;flex-wrap:wrap;gap:8px 26px;padding:14px 0;border-bottom:1px solid var(--line);font-size:.9rem}.topic-nav a{padding:3px 0;color:var(--muted)}.topic-nav a:hover,.topic-nav a[aria-current=page]{color:var(--blue);text-decoration:underline;text-underline-offset:6px}.article-answer{margin:26px 0 8px;padding:22px 25px;border-left:3px solid var(--blue);background:var(--wash)}.article-answer>strong{font-size:.875rem;color:var(--blue)}.article-answer p{margin:8px 0 0;line-height:1.8}.article-answer .reader-environment{font-size:.875rem;color:var(--muted);border-top:1px solid var(--line);padding-top:12px;margin-top:14px}.decision-flow{list-style:none;counter-reset:step;padding:0;margin:28px 0;display:grid;gap:12px}.decision-flow li{counter-increment:step;position:relative;background:var(--wash);border:1px solid var(--line);padding:19px 22px 19px 65px}.decision-flow li::before{content:counter(step,decimal-leading-zero);position:absolute;left:20px;top:20px;font:600 .875rem ui-monospace,monospace;color:var(--blue)}.decision-flow strong{display:block;font-size:1rem}.decision-flow p{margin:5px 0 0;font-size:.9375rem;line-height:1.8;color:var(--muted)}.code-example{margin:24px 0}.code-example figcaption{font-size:.875rem;color:var(--muted);padding-bottom:8px}.code-example pre{margin:0}.reading-links{list-style:none;padding:0;margin:20px 0}.reading-links li{padding:16px 0;border-bottom:1px solid var(--line)}.reading-links a{color:var(--blue);font-weight:600;text-decoration:underline;text-underline-offset:4px}.reading-links p{margin:7px 0 0;color:var(--muted);font-size:.9375rem;line-height:1.8}.related .reading-links a{border:0;padding:0}.revision-history{border-top:1px solid var(--line);margin-top:35px;padding-top:18px}.article-body .revision-history h2{font-size:1rem;margin:0 0 10px}.revision-history ul{padding-left:20px;font-size:.875rem;color:var(--muted)}.topic-header{max-width:920px}.topic-header h1{font-size:clamp(1.9rem,3.6vw,2.8rem);line-height:1.45;max-width:850px}.topic-header>p:last-child{max-width:780px;line-height:1.9;font-size:1.0625rem}.topic-guide .decision-flow{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.topic-guide .decision-flow li{padding:48px 22px 23px}.topic-reading{max-width:850px;margin:42px 0}.topic-reading h2{font-size:1.4rem;letter-spacing:-.035em}.prose .reading-links p{margin:7px 0 0}.byline time{white-space:nowrap}.article-layout>article{min-width:0}
@media(max-width:650px){.topic-guide .decision-flow{grid-template-columns:1fr}.topic-guide .decision-flow li{padding:19px 20px 19px 60px}.topic-nav{gap:6px 20px;font-size:.875rem}.article-answer{padding:18px}.decision-flow li{padding-right:16px;padding-left:56px}.decision-flow li::before{left:16px}.byline{gap:5px 14px}.topic-header{padding-top:32px}}