@font-face{font-family:VNDModern;src:url('/assets/fonts/VND-Modern.woff2?v=12e202d3eaef') format('woff2');font-weight:45 920;font-style:normal;font-display:swap}
@font-face{font-family:PretendardFallback;src:url('/assets/fonts/PretendardVariable.woff2') format('woff2');font-weight:45 920;font-style:normal;font-display:swap}
:root{
 --canvas:#EEF0F3;--paper:#F8F9FB;--surface:#E3E7ED;--surface-hover:#D8DFE8;
 --ink:#141820;--secondary:#454F60;--muted:#606B7D;
 --graphite:#121720;--graphite-raised:#202936;--inverse:#F5F7FB;--inverse-secondary:#BDC9DA;
 --action:#2458D6;--action-hover:#1745B0;--action-soft:#E4EBFA;--focus:#2458D6;--line:#CFD6E0;--dark-line:#364458;
 --bg:var(--canvas);--text:var(--ink);--panel:var(--paper);--raised:var(--surface-hover);--accent:var(--action);--accent-hover:var(--action-hover);--paper-soft:var(--surface);--ink-soft:var(--secondary);--blue:var(--action);--blue-soft:var(--action-soft);--soft:var(--surface);--cream:var(--paper);--butter:var(--graphite);--hover:var(--action-hover);
 --sans:VNDModern,PretendardFallback,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
 --font:var(--sans);--font-body:var(--sans);--font-display:var(--sans);--regular:400;--strong:650;--radius:12px;
}
html{scroll-padding-top:24px;background:var(--canvas)}
body{background:var(--canvas);color:var(--ink);font-family:var(--sans);font-weight:400;font-size:17px;line-height:1.65;letter-spacing:-.018em;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font-family:var(--sans);font-weight:400;letter-spacing:inherit}
h1,h2,h3,h4,strong,b{font-weight:650;letter-spacing:-.028em}
h1,h2,h3,h4{color:inherit;word-break:keep-all;text-wrap:balance}
p,li{word-break:keep-all;overflow-wrap:break-word}
a{color:inherit;text-underline-offset:4px}
a:hover{color:var(--action)}
button,a,input,select,summary{touch-action:manipulation}
:focus-visible{outline:2px solid var(--focus);outline-offset:4px}
button:disabled{cursor:default;opacity:.55}
.wrap{width:calc(100% - 96px);max-width:1280px;margin-inline:auto}
.icon{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.button{background:var(--action);color:var(--inverse);border:0;border-radius:var(--radius);box-shadow:none;min-height:48px;padding:12px 24px;font-size:16px;font-weight:650;line-height:1.5;display:inline-flex;align-items:center;justify-content:center;gap:24px;text-decoration:none}
.button:hover{background:var(--action-hover);color:var(--inverse);transform:none;box-shadow:none}
.text-link{font-size:16px;font-weight:650;min-height:44px;display:inline-flex;align-items:center;gap:12px;text-decoration:none;line-height:1.5}
.text-link:hover{text-decoration:underline}
.section-eyebrow,.kicker{font-size:14px;line-height:1.5;letter-spacing:0;color:var(--muted)}
.kicker:before{display:none}
.section-heading{align-items:end;gap:24px}
.section-heading h2{font-size:32px;line-height:1.25}
.section-heading p{font-size:16px;line-height:1.6}
.masthead-shell{background:var(--paper)}
.masthead{min-height:80px;padding-block:16px;gap:32px;flex-wrap:nowrap}
.brand{gap:16px;align-items:center;color:var(--ink)}
.brand .brand-name{font-size:36px;line-height:1;font-weight:650;letter-spacing:-.065em}
.brand-detail{font-size:12px;line-height:1.5;letter-spacing:-.01em;color:var(--secondary)}
.brand-detail b{font-weight:400}
.brand:hover{color:var(--ink)}
.nav{gap:24px;margin-left:auto;align-items:center}
.nav>a{font-size:15px;font-weight:400;line-height:1.5;white-space:nowrap}
.nav>a[aria-current=page]{font-weight:650;color:var(--action)}
.nav .search-trigger{width:48px;height:48px;min-width:48px;justify-content:center;padding:12px;background:var(--surface);border-radius:var(--radius);box-shadow:none}
.nav .search-trigger:hover{background:var(--surface-hover)}
.nav .search-label{display:none}
.mobile-nav{display:none}
.article-footer{background:var(--graphite);color:var(--inverse);margin-top:0}
.site-footer{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:64px;padding-block:48px;color:var(--inverse);border:0}
.footer-brand{font-size:36px;font-weight:650;line-height:1;letter-spacing:-.065em;color:var(--inverse)}
.footer-intro{font-size:17px;line-height:1.7;color:var(--inverse-secondary);margin-top:24px}
.footer-links{display:flex;flex-direction:column;align-items:flex-start;gap:8px;font-size:15px}
.footer-links strong{font-size:15px;margin-bottom:8px;color:var(--inverse)}
.footer-links a{min-height:32px;color:var(--inverse-secondary);text-decoration:none}
.footer-context{font-size:14px;line-height:1.8;color:var(--inverse-secondary)}
.footer-context p+p{margin-top:24px}
.site-footer a:hover{color:var(--inverse);text-decoration:underline}
.breadcrumbs{font-size:13px;gap:12px;color:var(--muted);margin-bottom:24px}
.breadcrumbs a{color:var(--secondary)}
.reading-page main:not(.guide-polished):not(.basics-page){max-width:1120px}
.reading-page .article-content{font-size:18px;line-height:1.9}
.reading-page main:not(.guide-polished):not(.basics-page):not(.content-hub)>.article-content{max-width:800px;margin-inline:auto;padding-bottom:64px}
.reading-page main:not(.guide-polished):not(.basics-page) .article-intro{padding-block:40px 32px}
.article-intro h1{font-size:40px;line-height:1.2}
.article-deck{font-size:18px;color:var(--secondary);line-height:1.75}
.article-section h2{font-size:28px;line-height:1.35}
.guide-directory{display:flex;flex-direction:column;gap:16px}
.directory-row{display:grid;grid-template-columns:1fr 240px 24px;gap:24px;align-items:center;background:var(--paper);padding:24px;border-radius:var(--radius);box-shadow:none;text-decoration:none}
.directory-row h2{font-size:24px;margin:0 0 8px}.directory-row p{font-size:16px;color:var(--secondary);margin:0}.directory-row>span{font-size:14px;color:var(--secondary)}
.directory-row:hover{background:var(--surface-hover);color:var(--ink)}
dialog{background:var(--paper);color:var(--ink);border:0;border-radius:var(--radius);box-shadow:none;max-width:760px}
dialog::backdrop{background:rgb(18 23 32 / .64)}
.dialog-shell{background:var(--paper)}.dialog-head{background:var(--surface);color:var(--secondary);padding:16px 24px}
.dialog-body{padding:32px}.dialog-body h2{font-size:28px}.dialog-body>p{font-size:16px;color:var(--secondary)}
.dialog-close{background:var(--paper);color:var(--ink);border-radius:var(--radius)}
.search-field{background:var(--surface);border:0;border-radius:var(--radius);box-shadow:none;min-height:56px}
.search-field:focus-within{outline:2px solid var(--focus);outline-offset:2px;box-shadow:none}
.search-field input{font-size:18px;color:var(--ink)}
.search-results{gap:8px}.search-result{padding:20px 16px;background:var(--paper);border-radius:var(--radius)}
.search-result:nth-child(even){background:var(--canvas)}.search-result:hover{background:var(--surface)}
.search-result strong{font-size:18px;line-height:1.5}.search-result-preview{font-size:16px!important;line-height:1.7!important;color:var(--secondary)!important;margin-top:8px}
.search-result-meta{font-size:13px!important;color:var(--muted)!important}
.search-count{font-size:14px;color:var(--muted)}
/* Comparison keeps the pair visible in the meaning of every row. */
.compare-page{background:var(--canvas)}
.compare-intro{padding-block:32px 40px}.compare-intro h1{font-size:40px;line-height:1.2;margin:12px 0 16px}
.compare-intro-layout{gap:48px}.compare-deck{font-size:17px;color:var(--secondary);line-height:1.7}
.compare-picker select{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);font-size:20px;font-weight:650;color:var(--ink)}
.compare-picker select:hover{background:var(--paper);border-color:var(--action)}
.compare-picker label{font-size:14px;color:var(--secondary)}
.comparison-scope{color:var(--secondary);font-size:15px;line-height:1.7}.comparison-status{color:var(--muted)}
.decision-table{background:var(--paper)}
.decision-table thead{background:var(--surface)}
.decision-table tbody tr:nth-child(even){background:var(--canvas)}
.decision-table th,.decision-table td{padding:24px}
.decision-table th{font-weight:650}.decision-table th>span:not(.compare-scope){color:var(--secondary)}
.decision-table td>strong{font-size:19px;font-weight:650;line-height:1.6}
.decision-table .compare-scope{font-size:15px;color:var(--secondary);line-height:1.65}
.decision-table figcaption{color:var(--muted)}.compare-name{font-size:28px;font-weight:650}
.decision-table summary{color:var(--secondary);font-size:15px}.decision-table details[open] summary{color:var(--ink);font-weight:650}
.decision-table details p{font-size:16px;line-height:1.8}.decision-table details a{color:var(--action)}
.compare-guide-links{background:var(--surface);padding:24px 0}.compare-guide-links a{color:var(--ink)}
.compare-next{padding-block:48px}.compare-next h2{font-size:28px}.compare-next>div>p:not(.section-eyebrow){font-size:17px;color:var(--secondary)}
.compare-cell-name{color:var(--secondary)}
/* Reading the recommendation: plain-language explanation, costs remain scoped. */
.recommend-page{background:var(--canvas)}
.recommend-page .recommend-hero{background:var(--graphite);color:var(--inverse);width:100%;max-width:none;margin:0;padding:40px max(48px,calc((100vw - 1280px)/2));border-radius:0}
.recommend-page .recommend-hero h1{color:var(--inverse);font-size:40px;line-height:1.2}
.recommend-page .recommend-hero>p,.recommend-page .recommend-hero .kicker{color:var(--inverse-secondary)}
.recommend-page .recommend-hero a{color:var(--inverse)}
.recommend-page .recommend-layout{padding-top:48px;gap:64px}
.recommend-page .pick-points li{font-size:17px;line-height:1.85}
.recommend-page .criteria-list{gap:24px}
.recommend-page .criteria-list p{font-size:17px;color:var(--secondary)}
.recommend-page .compare-table{background:var(--paper)}
.recommend-page .compare-table th{background:var(--surface);font-weight:650}
.recommend-page .compare-table td{color:var(--ink)}
.recommend-page .calculator{background:var(--surface);border-radius:var(--radius);padding:32px;gap:40px}
.recommend-page .number-field{background:var(--paper);border-radius:var(--radius);box-shadow:none}
.recommend-page .calc-output{background:var(--paper);border-radius:var(--radius);padding:32px}
.recommend-page .calc-output dd.net{font-weight:650;color:var(--ink)}
.recommend-page .calc-output .calc-disclaimer,.recommend-page .field-help{color:var(--secondary)}
.recommend-page .field-label{font-weight:650}
/* Beginner's guide: a definition before vocabulary and decisions. */
.basics-page{max-width:none}
.basics-hero{background:var(--graphite);color:var(--inverse);padding:48px 0}
.basics-hero.wrap{width:100%;max-width:none;padding:40px max(48px,calc((100vw - 1280px)/2))}
.basics-hero h1{font-size:48px;line-height:1.2;max-width:840px;margin:0 0 24px}
.basics-hero p{font-size:18px;max-width:760px;color:var(--inverse-secondary);line-height:1.8}
.basics-hero .section-eyebrow,.basics-hero .breadcrumbs{color:var(--inverse-secondary)}
.basics-hero a{color:var(--inverse)}
.basics-hero :focus-visible,.recommend-hero :focus-visible,.article-footer :focus-visible{outline-color:var(--inverse)}
.basics-content>.basics-introduction{margin:32px 0 0;max-width:760px;font-size:18px;line-height:1.8;color:var(--secondary)}
.basics-hero .basics-meta,.basics-hero .basics-evidence{font-size:13px;line-height:1.7;margin-top:16px}
.basics-evidence{font-size:13px!important;line-height:1.7!important;color:var(--muted)!important;margin-top:12px!important}
.basics-hero .basics-evidence{color:var(--inverse-secondary)!important}
.basics-evidence a{font-size:inherit}
.basics-jumps{display:flex;flex-wrap:wrap;gap:8px 24px;padding-block:24px;background:var(--surface)}
.basics-jumps a{min-height:44px;display:inline-flex;align-items:center;font-size:15px;font-weight:650;text-decoration:none}
.basics-hero .basics-jumps{background:transparent;padding-bottom:0;max-width:840px}
.basics-section{max-width:800px;margin-inline:auto;padding-block:48px}
.basics-section+.basics-section{padding-top:0}
.basics-section h2{font-size:30px;line-height:1.35;margin-bottom:24px}
.basics-section h3{font-size:21px;line-height:1.5;margin:24px 0 12px}
.basics-section p,.basics-section li,.basics-section dd{font-size:18px;line-height:1.85;color:var(--secondary)}
.basics-section p+p{margin-top:16px}
.basics-section ul,.basics-section ol{padding-left:24px}
.basics-section li+li{margin-top:16px}
.basics-section strong{color:var(--ink);font-weight:650}
.basics-flow{background:var(--surface);padding:32px!important;border-radius:var(--radius);list-style:none}
.basics-flow>li,.basics-costs>li,.basics-checks>li{display:grid;grid-template-columns:32px 1fr;column-gap:16px}
.basics-number{font-size:15px;font-weight:650;color:var(--action);padding-top:4px}
.basics-costs,.basics-checks{list-style:none;padding-left:0!important}
.basics-flow h3,.basics-costs h3,.basics-checks h3{margin-top:0}
.basics-flow>li>p,.basics-flow>li>strong,.basics-flow>li>h3{grid-column:2;margin-top:0}
.basics-modes{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.basics-modes>article,.basics-modes>div{background:var(--paper);padding:24px;border-radius:var(--radius)}
.basics-modes h3{margin-top:0}
.basics-terms{margin:0}.basics-terms>div{padding:24px;background:var(--paper)}
.basics-terms>div:nth-child(even){background:var(--surface)}
.basics-terms dt{font-size:20px;font-weight:650;line-height:1.5;margin-bottom:8px}
.basics-terms dd{margin:0;font-size:17px}
.basics-faq details{padding:20px 0}.basics-faq summary{font-size:18px;font-weight:650;cursor:pointer;min-height:44px}
.basics-faq details[open]{background:var(--paper);padding:20px 24px;border-radius:var(--radius)}
.basics-faq details p{font-size:17px;margin-top:16px}
.basics-sources{font-size:14px!important;line-height:1.8}.basics-sources li{font-size:14px!important}.basics-sources a{color:var(--action)}
.basics-next{background:var(--surface);padding:32px;border-radius:var(--radius)}
.basics-next a{display:inline-flex;align-items:center;gap:12px;min-height:44px;font-weight:650;margin-right:24px}
@media(min-width:1600px){.wrap{max-width:1440px}}
@media(max-width:1100px){.wrap{width:calc(100% - 64px)}.masthead{gap:24px}.brand-detail{display:none}.nav{gap:20px}.site-footer{gap:32px}.compare-intro-layout{gap:32px}.recommend-page .recommend-hero,.basics-hero.wrap{padding-inline:32px}}
@media(max-width:767px){
 .wrap{width:calc(100% - 40px)}
 body{padding-bottom:calc(64px + env(safe-area-inset-bottom));font-size:16px}
 .masthead{min-height:72px;padding-block:12px}.brand .brand-name{font-size:32px}.brand-detail{display:block;font-size:11px}
 .masthead .nav>a:not(.search-trigger){display:none}.nav .search-trigger{background:var(--surface)}
 .mobile-nav{position:fixed;inset:auto 0 0;z-index:50;display:grid;grid-template-columns:repeat(5,1fr);background:var(--paper);padding:4px 8px calc(4px + env(safe-area-inset-bottom));box-shadow:none}
 .mobile-nav a{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-height:56px;font-size:12px;line-height:1.3;text-decoration:none;color:var(--secondary);border-radius:var(--radius)}
 .mobile-nav a[aria-current=page]{color:var(--ink);font-weight:650;background:var(--surface)}
 .mobile-nav a:hover{background:var(--surface)}
 .site-footer{grid-template-columns:1fr 1fr;gap:32px 24px;padding-block:40px}.footer-about{grid-column:1/-1}.footer-intro{font-size:16px;margin-top:16px}.footer-context{font-size:13px}
 .section-heading h2{font-size:26px}.section-heading p{font-size:16px}
 .reading-page main:not(.guide-polished):not(.basics-page) .article-intro{padding-block:24px}.article-intro h1{font-size:32px}
 .directory-row{grid-template-columns:1fr 20px;padding:24px;gap:16px}.directory-row>span{grid-column:1;grid-row:2}.directory-row>.icon{grid-column:2;grid-row:1/3}.directory-row h2{font-size:22px}
 .dialog-body{padding:24px 20px}.dialog-body h2{font-size:24px}.dialog-head{padding-inline:20px}.search-result strong{font-size:17px}
 .compare-intro{padding-block:24px}.compare-intro h1{font-size:32px;margin:0 0 16px}.compare-intro-layout{gap:16px}
 .compare-deck{font-size:16px}.compare-picker select{font-size:18px;min-height:48px}.comparison-scope{font-size:14px}
 .decision-table th,.decision-table td{padding:16px 12px}.decision-table tbody th{padding:20px 12px 0}
 .decision-table .compare-scope{font-size:14px}.decision-table td>strong{font-size:17px}.compare-name{font-size:24px}
 .decision-table summary{font-size:14px}.compare-next{gap:16px;padding-block:40px}
 .recommend-page .recommend-hero{padding:32px 20px}.recommend-page .recommend-hero h1{font-size:32px}.recommend-page .recommend-hero>p{font-size:17px}
 .recommend-page .recommend-layout{padding-top:32px;gap:40px}.recommend-page .calculator{padding:20px;gap:24px}.recommend-page .calc-output{padding:24px}
 .basics-hero{padding:32px 0}.basics-hero h1{font-size:32px}.basics-hero p{font-size:17px}.basics-jumps{padding-block:16px;gap:0 20px}
 .basics-hero.wrap{padding:32px 20px}
 .basics-section{padding-block:32px}.basics-section h2{font-size:26px}.basics-section p,.basics-section li,.basics-section dd{font-size:17px;line-height:1.85}
 .basics-flow{padding:24px 20px!important}.basics-modes{grid-template-columns:1fr;gap:16px}.basics-terms>div{padding:20px}.basics-terms dt{font-size:19px}.basics-next{padding:24px}
}
@media(max-width:359px){.wrap{width:calc(100% - 32px)}.brand{gap:12px}.brand-detail{font-size:10px}.button{padding-inline:16px;gap:12px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}