:root{--ink:#0b1d3f;--ink-2:#33415c;--muted:#5f6b84;--line:#dce2ee;--line-strong:#b9c3d6;--paper:#fff;--mist:#f3f6fb;--stone:#e9dfcb;--stone-ink:#5b4a2a;--blue:#0038b8;--blue-2:#002a8a;--blue-soft:#e5ecfb;--green:#1d7a55;--red:#b3261e;--focus:#0038b8;--r-s:6px;--r-m:12px;--maxw:1180px;--read:720px;--display:"Frank Ruhl Libre", Georgia, "Times New Roman", serif;--text:"IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--ink:#e8edf7;--ink-2:#c3ccdd;--muted:#93a0b8;--line:#26324a;--line-strong:#3a4864;--paper:#0e1729;--mist:#131e34;--stone:#2a2519;--stone-ink:#e3d3b2;--blue:#6e9bff;--blue-2:#9dbbff;--blue-soft:#18284a;--green:#4fc08d;--red:#ff8a80;--focus:#9dbbff;color-scheme:dark}}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}body{background:var(--paper);color:var(--ink);font-family:var(--text);font-feature-settings:"tnum" 1, "lnum" 1;margin:0;font-size:18px;line-height:1.65}.flagline{background:var(--blue);height:4px}.flagline:after{content:"";background:var(--blue);opacity:.35;height:2px;margin-top:3px;display:block}a{color:var(--blue);text-underline-offset:3px;text-decoration-thickness:1px}a:hover{color:var(--blue-2)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:3px}h1,h2,h3,h4{font-family:var(--display);color:var(--ink);letter-spacing:-.005em;margin:0 0 .5em;line-height:1.12}h1{font-size:clamp(2.1rem,4.6vw,3.4rem);font-weight:700}h2{margin-top:2.2em;font-size:clamp(1.55rem,2.8vw,2.05rem);font-weight:700}h3{margin-top:1.7em;font-size:1.3rem;font-weight:500}h4{font-family:var(--text);margin-top:1.4em;font-size:1rem;font-weight:600}p{margin:0 0 1.05em}ul,ol{margin:0 0 1.1em;padding-left:1.3em}li{margin:.3em 0}strong{font-weight:600}small,.small{color:var(--muted);font-size:.86rem}hr{border:0;border-top:1px solid var(--line);margin:2.5em 0}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}.lede{color:var(--ink-2);max-width:680px;font-size:1.22rem;line-height:1.55}.site-header{background:var(--paper);border-bottom:1px solid var(--line);z-index:20;position:sticky;top:0}.site-header .wrap{justify-content:space-between;align-items:center;gap:1.2em;height:66px;display:flex}.brand{font-family:var(--display);color:var(--ink);align-items:center;gap:.5em;font-size:1.45rem;font-weight:700;text-decoration:none;display:flex}.brand:hover{color:var(--ink)}.brand svg{border-radius:8px;flex:none;width:32px;height:32px}.nav a{color:var(--ink-2);border-bottom:2px solid #0000;padding:.3em 0;text-decoration:none}.nav a:hover,.nav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--blue)}.lang{color:var(--ink-2);border:1px solid var(--line-strong);border-radius:999px;padding:.35em .8em;font-size:.9rem;text-decoration:none}.lang:hover{border-color:var(--blue);color:var(--blue)}.menu-btn{border:1px solid var(--line-strong);border-radius:var(--r-s);font:inherit;color:var(--ink);background:0 0;padding:.35em .6em;display:none}@media (width<=900px){.nav{background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;gap:.2em;padding:8px 20px 16px;display:none;position:absolute;top:66px;left:0;right:0}.nav.open{display:flex}.menu-btn{display:inline-block}}.crumbs{color:var(--muted);margin:26px 0 14px;font-size:.88rem}.crumbs ol{flex-wrap:wrap;gap:.4em;margin:0;padding:0;list-style:none;display:flex}.crumbs li{margin:0}.crumbs li+li:before{content:"/";color:var(--line-strong);margin-right:.4em}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--blue);text-decoration:underline}.btn{background:var(--blue);color:#fff;border-radius:var(--r-s);font:inherit;cursor:pointer;border:0;align-items:center;gap:.5em;padding:.78em 1.25em;font-size:1rem;font-weight:600;text-decoration:none;display:inline-flex}.btn:hover{background:var(--blue-2);color:#fff}.btn.ghost{color:var(--blue);box-shadow:inset 0 0 0 1.5px var(--blue);background:0 0}.btn.ghost:hover{background:var(--blue-soft);color:var(--blue-2)}label{color:var(--ink-2);margin-bottom:.35em;font-size:.88rem;font-weight:500;display:block}input,select,textarea{width:100%;font:inherit;border:1px solid var(--line-strong);border-radius:var(--r-s);background:var(--paper);color:var(--ink);padding:.7em .8em;font-size:1rem}input:focus,select:focus,textarea:focus{outline:2px solid var(--focus);outline-offset:0;border-color:var(--focus)}.tool{background:var(--paper);border:1px solid var(--line-strong);border-radius:var(--r-m);margin:1.6em 0;padding:26px}.tool .row{grid-template-columns:1fr auto 1fr;align-items:end;gap:14px;display:grid}@media (width<=680px){.tool .row{grid-template-columns:1fr!important}}.result{font-family:var(--display);color:var(--ink);margin:.55em 0 .15em;font-size:clamp(1.8rem,4.2vw,2.6rem);font-weight:700}.swap{background:var(--mist);border:1px solid var(--line-strong);cursor:pointer;width:42px;height:42px;color:var(--ink);border-radius:999px;font-size:1rem}.home-hero{border-bottom:1px solid var(--line);padding:56px 0 30px}.home-hero .grid{grid-template-columns:1.05fr 1fr;align-items:center;gap:48px;display:grid}@media (width<=900px){.home-hero .grid{grid-template-columns:1fr;gap:28px}}.section{padding:48px 0}.section.mist{background:var(--mist);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section h2{margin-top:0}.register{border-top:1px solid var(--line-strong);margin:1em 0 0;padding:0;list-style:none}.register li{border-bottom:1px solid var(--line);margin:0}.register a{color:var(--ink);grid-template-columns:44px 1fr auto;align-items:center;gap:16px;padding:16px 4px;text-decoration:none;display:grid}.register a:hover{background:var(--mist)}.register .ico{border-radius:var(--r-s);background:var(--blue-soft);width:40px;height:40px;color:var(--blue);place-items:center;display:grid}.register .ico svg{width:22px;height:22px}.register strong{font-size:1.05rem;display:block}.register span{color:var(--muted);font-size:.93rem}.register .tag{color:var(--muted);border:1px solid var(--line);white-space:nowrap;border-radius:999px;padding:.15em .65em;font-size:.8rem}.register li.soon a{pointer-events:none;opacity:.62}.paths{border:1px solid var(--line-strong);border-radius:var(--r-m);background:var(--paper);grid-template-columns:repeat(4,1fr);gap:0;display:grid;overflow:hidden}@media (width<=900px){.paths{grid-template-columns:1fr 1fr}}@media (width<=560px){.paths{grid-template-columns:1fr}}.paths a{color:var(--ink);border-right:1px solid var(--line);padding:22px;text-decoration:none}.paths a:last-child{border-right:0}.paths a:hover{background:var(--blue-soft)}.paths h3{margin:0 0 .35em;font-size:1.2rem}.paths p{color:var(--muted);margin:0;font-size:.94rem}.article-head{border-bottom:1px solid var(--line);padding:0 0 26px}.article-head h1{max-width:900px}.byline{color:var(--muted);flex-wrap:wrap;gap:8px 22px;margin-top:18px;font-size:.9rem;display:flex}.byline b{color:var(--ink-2);font-weight:500}.article-grid{grid-template-columns:minmax(0, var(--read)) 280px;justify-content:space-between;gap:64px;padding-top:34px;display:grid}@media (width<=1060px){.article-grid{grid-template-columns:1fr;gap:0}.toc-side{display:none}}.toc-side{align-self:start;font-size:.92rem;position:sticky;top:92px}.toc-side p{color:var(--ink);margin-bottom:.6em;font-weight:600}.toc-side ol{border-left:2px solid var(--line);margin:0;padding:0;list-style:none}.toc-side li{margin:0}.toc-side a{color:var(--muted);border-left:2px solid #0000;margin-left:-2px;padding:.32em 0 .32em 14px;line-height:1.35;text-decoration:none;display:block}.toc-side a:hover,.toc-side a.active{color:var(--blue);border-left-color:var(--blue)}.toc-side .side-cta{background:var(--mist);border-radius:var(--r-m);margin-top:22px;padding:16px}.toc-side .side-cta p{font-family:var(--display);margin-bottom:.4em;font-size:1.1rem}.toc-side .side-cta span{color:var(--muted);margin-bottom:.8em;line-height:1.45;display:block}.prose{font-size:1.06rem}.prose>h2:first-child{margin-top:0}.prose table{border-collapse:collapse;width:100%;margin:1.3em 0 1.6em;font-size:.95rem}.prose caption{text-align:left;color:var(--muted);caption-side:top;padding-bottom:.5em;font-size:.88rem}.prose th,.prose td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:.62em .75em}.prose thead th{background:var(--mist);border-bottom:1px solid var(--line-strong);font-weight:600}.prose td.num,.prose th.num{text-align:right;white-space:nowrap}.table-scroll{-webkit-overflow-scrolling:touch;overflow-x:auto}.answer{border:1px solid var(--line-strong);border-left:5px solid var(--blue);border-radius:var(--r-s);background:var(--paper);margin:0 0 2em;padding:18px 22px}.answer h2{font-family:var(--text);color:var(--blue);margin:0 0 .5em;font-size:1rem;font-weight:600}.answer p:last-child{margin-bottom:0}.figures{background:var(--stone);color:var(--stone-ink);border-radius:var(--r-m);margin:1.6em 0 2.2em;padding:22px 24px}.figures h2{font-family:var(--text);color:var(--stone-ink);margin:0 0 14px;font-size:1rem;font-weight:600}.figures dl{grid-template-columns:repeat(3,1fr);gap:18px 24px;margin:0;display:grid}@media (width<=680px){.figures dl{grid-template-columns:1fr 1fr}}.figures dt{font-size:.85rem;line-height:1.3}.figures dd{font-family:var(--display);color:var(--ink);margin:.15em 0 0;font-size:1.6rem;font-weight:700;line-height:1.1}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .figures dd{color:#f4ead5}}.note{border-radius:var(--r-s);background:var(--mist);border:1px solid var(--line);margin:1.4em 0;padding:14px 18px}.note.warn{color:#5a3a0e;background:#fdf3e6;border-color:#f0d3a8}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .note.warn{color:#f2d9ae;background:#2d2312;border-color:#5c4520}}.note p:last-child{margin-bottom:0}.example{border:1px solid var(--line-strong);border-radius:var(--r-m);margin:1.5em 0;overflow:hidden}.example>header{background:var(--mist);border-bottom:1px solid var(--line);padding:12px 18px}.example>header strong{font-family:var(--display);font-size:1.12rem;font-weight:700}.example>header span{color:var(--muted);font-size:.9rem;display:block}.example .body{padding:6px 18px 14px}.example table{margin:.6em 0}.example tr.total td{border-top:2px solid var(--ink);border-bottom:0;font-weight:600}.example tr.net td{color:var(--green);font-weight:700}.steps{counter-reset:s;padding:0;list-style:none}.steps>li{counter-increment:s;margin:1.1em 0;padding-left:46px;position:relative}.steps>li:before{content:counter(s);background:var(--blue);color:#fff;border-radius:999px;place-items:center;width:30px;height:30px;font-size:.9rem;font-weight:600;display:grid;position:absolute;top:.05em;left:0}.timeline{border-left:2px solid var(--line-strong);margin-left:6px;padding:0;list-style:none}.timeline li{margin:0;padding:0 0 1.1em 22px;position:relative}.timeline li:before{content:"";background:var(--paper);border:2px solid var(--blue);border-radius:999px;width:12px;height:12px;position:absolute;top:.45em;left:-7px}.timeline time{color:var(--ink);font-weight:600;display:block}details.faq{border-top:1px solid var(--line);padding:1em 0}details.faq:last-of-type{border-bottom:1px solid var(--line)}details.faq summary{cursor:pointer;justify-content:space-between;gap:1em;font-weight:600;list-style:none;display:flex}details.faq summary::-webkit-details-marker{display:none}details.faq summary:after{content:"+";color:var(--blue);font-size:1.3rem;line-height:1}details.faq[open] summary:after{content:"–"}details.faq p{color:var(--ink-2);margin:.7em 0 0}.sources{color:var(--ink-2);font-size:.9rem}.sources ol{padding-left:1.4em}.sources li{margin:.45em 0}.reviewer{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:52px 1fr;align-items:start;gap:14px;margin:2.4em 0;padding:18px 0;font-size:.95rem;display:grid}.reviewer .mono{background:var(--blue);color:#fff;width:52px;height:52px;font-family:var(--display);border-radius:999px;place-items:center;font-size:1.3rem;font-weight:700;display:grid}.reviewer p{margin:0 0 .3em}.related{grid-template-columns:repeat(3,1fr);gap:16px;margin:1em 0 0;display:grid}@media (width<=760px){.related{grid-template-columns:1fr}}.related a{border:1px solid var(--line-strong);border-radius:var(--r-m);color:var(--ink);padding:16px 18px;text-decoration:none;display:block}.related a:hover{border-color:var(--blue)}.related strong{font-family:var(--display);margin-bottom:.2em;font-size:1.1rem;display:block}.related span{color:var(--muted);font-size:.9rem}.stairs{margin:1.4em 0 .6em}.stairs svg{width:100%;height:auto;display:block}.stairs .step{fill:var(--blue-soft);stroke:var(--blue);stroke-width:1.5px}.stairs .step.hi{fill:var(--blue)}.stairs .rate{font-family:var(--display);fill:var(--ink);font-size:26px;font-weight:700}.stairs .step.hi+.rate,.stairs .rate.on-dark{fill:#fff}.stairs .lim{font-family:var(--text);fill:var(--muted);font-size:13px}.stairs-legend{color:var(--muted);font-size:.88rem}.lead{background:var(--blue);color:#fff;border-radius:var(--r-m);margin:3em 0 1em;padding:30px}.lead h2{color:#fff;margin-top:0}.lead p{color:#d6e0fa}.lead .grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}@media (width<=640px){.lead .grid{grid-template-columns:1fr}}.lead label{color:#d6e0fa}.lead input,.lead textarea{color:#0b1d3f;background:#fff;border-color:#0000}.lead .consent{color:#d6e0fa;align-items:flex-start;gap:.55em;margin:12px 0;font-size:.84rem;font-weight:400;display:flex}.lead .consent input{width:auto;margin-top:.3em}.lead .btn{color:var(--blue);background:#fff}.lead .btn:hover{color:#002a8a;background:#e5ecfb}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .lead{background:#12306f}}.site-footer{border-top:1px solid var(--line);color:var(--muted);background:var(--mist);margin-top:72px;padding:40px 0 52px;font-size:.92rem}.site-footer .cols{grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;display:grid}@media (width<=820px){.site-footer .cols{grid-template-columns:1fr 1fr}}.site-footer h3{font-family:var(--text);color:var(--ink);margin:0 0 .7em;font-size:.95rem;font-weight:600}.site-footer a{color:var(--ink-2);margin:.35em 0;text-decoration:none;display:block}.site-footer a:hover{color:var(--blue)}.site-footer .legal{border-top:1px solid var(--line);margin-top:28px;padding-top:18px;font-size:.84rem}@media (width<=640px){.register a{grid-template-columns:36px 1fr}.register .tag,.register a>span[aria-hidden]{display:none}.register .ico{width:32px;height:32px}.stairs svg{display:none}.stairs-list{display:block!important}}.stairs-list{border-top:1px solid var(--line-strong);margin:0 0 .6em;padding:0;list-style:none;display:none}.stairs-list li{border-bottom:1px solid var(--line);justify-content:space-between;margin:0;padding:.55em 0;display:flex}.stairs-list li.hi{color:var(--blue);font-weight:600}.stairs-list b{font-family:var(--display);font-size:1.15rem}.readbar{z-index:30;pointer-events:none;height:3px;position:fixed;top:0;left:0;right:0}.readbar span{background:var(--blue);transform-origin:0;height:100%;transition:transform .1s linear;display:block;transform:scaleX(0)}.figures dd{letter-spacing:-.01em;font-size:1.9rem}.figures dl>div{border-left:2px solid #5b4a2a40;padding-left:12px}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .figures dl>div{border-left-color:#e3d3b24d}}.prose tbody tr:hover td{background:var(--mist)}.prose table{font-variant-numeric:tabular-nums}.register a{transition:background .12s,padding-left .12s}.register a:hover{padding-left:10px}.crumbs ol{align-items:center}.crumbs li{align-items:center;display:flex;position:relative}.crumbs .crumb-toggle{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:4px;margin-left:2px;padding:2px 4px;font-size:.8rem;line-height:1}.crumbs .crumb-toggle:hover{color:var(--blue);background:var(--mist)}.crumbs .crumb-menu{background:var(--paper);border:1px solid var(--line-strong);border-radius:var(--r-m);z-index:25;min-width:280px;max-width:360px;padding:12px 8px;display:none;position:absolute;top:calc(100% + 8px);left:-8px;box-shadow:0 16px 40px #0b1d3f24}.crumbs .crumb-menu p{color:var(--muted);margin:0 8px 6px;font-size:.78rem;font-weight:600}.crumbs .crumb-menu ul{margin:0;padding:0;list-style:none}.crumbs .crumb-menu li{margin:0;display:block}.crumbs .crumb-menu a,.crumbs .crumb-menu span{border-radius:var(--r-s);color:var(--ink);padding:7px 10px;font-size:.92rem;line-height:1.3;text-decoration:none;display:block}.crumbs .crumb-menu a:hover,.crumbs .crumb-menu a[aria-current=page]{background:var(--blue-soft);color:var(--blue-2)}.crumbs .crumb-menu li.soon span{color:var(--muted)}.crumbs .crumb-menu em{border:1px solid var(--line);border-radius:999px;margin-left:.4em;padding:0 .5em;font-size:.75rem;font-style:normal}.crumbs .has-menu.open .crumb-menu{display:block}@media (hover:hover){.crumbs .has-menu:focus-within .crumb-menu{display:block}}@media (width<=640px){.crumbs .crumb-menu{min-width:240px;max-width:calc(100vw - 40px);left:0}}.crumbs .crumb-menu li+li:before{content:none}.crumbs .crumb-menu li{padding:0}.home-hero h1{max-width:15ch}.tool .row{align-items:end}.tool .row .swap{margin-bottom:2px}.site-header .wrap{height:68px}.nav{gap:.25em;font-size:.97rem;display:flex}.nav-item{align-items:center;display:flex;position:relative}.nav-item>a{color:var(--ink-2);border-radius:var(--r-s);padding:.55em .7em;text-decoration:none}.nav-item>a:hover,.nav-item>a[aria-current=page]{color:var(--ink);background:var(--mist)}.nav-toggle{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:4px;margin-left:-4px;padding:4px;font-size:.75rem}.nav-toggle:hover{color:var(--blue)}.mega{background:var(--paper);border:1px solid var(--line-strong);border-radius:var(--r-m);z-index:30;min-width:300px;max-width:380px;padding:10px 8px 8px;display:none;position:absolute;top:calc(100% + 10px);left:0;box-shadow:0 18px 44px #0b1d3f29}.mega ul{margin:0;padding:0;list-style:none}.mega li{margin:0}.mega a,.mega span{border-radius:var(--r-s);color:var(--ink);padding:8px 10px;font-size:.93rem;line-height:1.3;text-decoration:none;display:block}.mega a:hover,.mega a[aria-current=page]{background:var(--blue-soft);color:var(--blue-2)}.mega li.soon span{color:var(--muted)}.mega em{border:1px solid var(--line);border-radius:999px;margin-left:.35em;padding:0 .5em;font-size:.74rem;font-style:normal}.mega .mega-all{border-top:1px solid var(--line);color:var(--blue);border-radius:0;margin-top:6px;font-weight:500}.nav-item.open .mega{display:block}@media (hover:hover){.nav-item:focus-within .mega{display:block}}.header-right{align-items:center;gap:10px;display:flex}.langpick{position:relative}.lang{background:var(--paper);cursor:pointer;font:inherit;align-items:center;gap:.45em;font-size:.9rem;display:inline-flex}.lang .caret{color:var(--muted);font-size:.7rem}.lang-menu{background:var(--paper);border:1px solid var(--line-strong);border-radius:var(--r-m);z-index:30;min-width:190px;margin:0;padding:6px;list-style:none;display:none;position:absolute;top:calc(100% + 10px);right:0;box-shadow:0 18px 44px #0b1d3f29}.lang-menu li{margin:0}.lang-menu a,.lang-menu span{border-radius:var(--r-s);color:var(--ink);align-items:center;gap:.6em;padding:8px 10px;font-size:.95rem;text-decoration:none;display:flex}.lang-menu a:hover,.lang-menu a[aria-current=true]{background:var(--blue-soft);color:var(--blue-2)}.lang-menu li.soon span{color:var(--muted)}.lang-menu em{border:1px solid var(--line);border-radius:999px;margin-left:auto;padding:0 .5em;font-size:.74rem;font-style:normal}.langpick.open .lang-menu{display:block}.flag{font-size:1.15em;line-height:1}@media (width<=900px){.nav{background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;gap:0;max-height:calc(100vh - 68px);padding:8px 12px 16px;display:none;position:absolute;top:68px;left:0;right:0;overflow:auto}.nav.open{display:flex}.nav-item{border-bottom:1px solid var(--line);flex-wrap:wrap;padding:4px 0}.nav-item>a{flex:1}.mega{width:100%;box-shadow:none;border:0;max-width:none;padding:0 0 8px 12px;display:none;position:static}.nav-item.open .mega{display:block}}.home-hero{background:var(--paper);color:var(--ink);border-bottom:1px solid var(--line);padding:64px 0 56px;position:relative;overflow:hidden}.home-hero:before{content:"";background:radial-gradient(900px 420px at 80% 10%, var(--blue-soft), transparent 65%);pointer-events:none;position:absolute;inset:0}.home-hero .wrap{position:relative}.home-hero h1{color:var(--ink);letter-spacing:-.012em;max-width:15ch;font-size:clamp(2.3rem,5vw,3.8rem);font-weight:900}.home-hero .lede{color:var(--ink-2);font-size:1.18rem}.home-hero .btn{background:var(--blue);color:#fff}.home-hero .btn:hover{background:var(--blue-2)}.home-hero .btn.ghost{color:var(--blue);box-shadow:inset 0 0 0 1.5px var(--blue);background:0 0}.home-hero .btn.ghost:hover{background:var(--blue-soft)}.home-hero .trust{color:var(--muted);flex-wrap:wrap;gap:22px;margin-top:26px;font-size:.9rem;display:flex}.home-hero .trust span:before{content:"✓";color:var(--green);margin-right:.45em;font-weight:700}.cx{background:var(--paper);border:1px solid var(--line-strong);border-radius:16px;padding:22px;box-shadow:0 24px 60px #0b1d3f1a}.cx-row{grid-template-columns:1fr 44px 1fr;align-items:end;gap:10px;display:grid}@media (width<=560px){.cx-row{grid-template-columns:1fr}.cx-swap{justify-self:center;transform:rotate(90deg)}}.cx-field>span{color:var(--muted);margin-bottom:6px;font-size:.82rem;font-weight:500;display:block}.cx-input{border:1.5px solid var(--line-strong);background:var(--paper);border-radius:12px;display:flex;overflow:hidden}.cx-input:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}.cx-input input{font-family:var(--display);border:0;border-radius:0;min-width:0;padding:.4em .6em;font-size:1.55rem;font-weight:700}.cx-input input:focus{outline:none}.cx-input select{border:0;border-left:1.5px solid var(--line);background:var(--mist);cursor:pointer;border-radius:0;width:auto;padding:0 .6em;font-weight:600}.cx-input select:focus{outline:none}.cx-swap{border:1.5px solid var(--line-strong);background:var(--paper);width:44px;height:44px;color:var(--blue);cursor:pointer;border-radius:999px;place-items:center;margin-bottom:4px;transition:transform .2s,background .15s;display:grid}.cx-swap:hover{background:var(--blue-soft);transform:rotate(180deg)}.cx-rate{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:12px;margin-top:16px;display:flex}.cx-rate-label{color:var(--muted);font-size:.78rem;display:block}.cx-rate strong{font-family:var(--display);font-size:1.25rem;font-weight:700}.cx-deltas{gap:12px;font-size:.85rem;font-weight:600;display:flex}.cx-deltas .up{color:var(--green)}.cx-deltas .down{color:var(--red)}.cx-quick{flex-wrap:wrap;gap:6px;margin-top:12px;display:flex}.cx-quick button{font:inherit;border:1px solid var(--line);background:var(--mist);color:var(--ink-2);cursor:pointer;border-radius:999px;padding:.3em .7em;font-size:.82rem}.cx-quick button:hover{border-color:var(--blue);color:var(--blue)}.cx-chart{margin-top:16px}.cx-ranges{gap:4px;margin-bottom:8px;display:flex}.cx-ranges button{font:inherit;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:.3em .75em;font-size:.8rem;font-weight:600}.cx-ranges button[aria-selected=true]{background:var(--ink);color:#fff}.cx-chart svg{width:100%;height:auto;display:block}.cx-minmax{color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:8px;margin-top:4px;font-size:.8rem;display:flex}.cx-src{color:var(--muted);margin:12px 0 0;font-size:.78rem}.cx.compact{box-shadow:none}.nav-item:after,.crumbs .has-menu:after{content:"";height:14px;display:none;position:absolute;top:100%;left:0;right:0}.nav-item:hover:after,.crumbs .has-menu:hover:after,.nav-item.hovering:after,.crumbs .has-menu.hovering:after,.nav-item.hovering .mega,.crumbs .has-menu.hovering .crumb-menu{display:block}.mega,.crumbs .crumb-menu{top:calc(100% + 12px)}.toc-side .side-cta .btn{justify-content:center;width:100%;display:inline-flex;color:#fff!important}.toc-side .side-cta .btn:hover{color:#fff!important}@media (width<=760px){body{font-size:17px}.wrap{padding:0 18px}.article-grid{padding-top:22px}.article-head{padding-bottom:18px}.article-head h1{letter-spacing:-.01em;font-size:clamp(1.75rem,7.2vw,2.2rem);line-height:1.18}.lede{font-size:1.05rem;line-height:1.5}.byline{gap:6px 14px;margin-top:12px;font-size:.84rem}.byline span{display:block}.prose{font-size:1rem}.prose h2{margin-top:1.8em;font-size:1.45rem}.prose h3{font-size:1.15rem}.answer{margin-left:0;margin-right:0;padding:14px 16px}.answer h2{font-size:.92rem}.figures{padding:16px}.figures dl{grid-template-columns:1fr 1fr;gap:14px 16px}.figures dd{font-size:1.45rem}.example>header,.example .body{padding-left:14px;padding-right:14px}.prose table{font-size:.88rem}.prose th,.prose td{padding:.5em}.note,.note.warn{padding:12px 14px}.lead{border-radius:var(--r-m);padding:20px 16px}.crumbs{margin:16px 0 10px;font-size:.82rem}.steps>li{padding-left:40px}.steps>li:before{width:26px;height:26px;font-size:.8rem}}.answer,.figures,.note,.example,.lead,.tool,.cx,.reviewer{box-sizing:border-box;max-width:100%}.prose img,.prose svg{max-width:100%;height:auto}html,body{overflow-x:hidden}@media (width<=1060px){.article-grid{display:block}.article-grid>.prose{min-width:0;max-width:100%}}.prose{min-width:0}@media (width<=760px){.prose table{white-space:nowrap;-webkit-overflow-scrolling:touch;display:block;overflow-x:auto}.prose table caption{white-space:normal;display:block}.prose table td:first-child,.prose table th:first-child{white-space:normal;min-width:150px}.example table{white-space:normal;display:table}.example table td:first-child{min-width:0}}.cta{border-radius:var(--r-m);grid-template-columns:1fr auto;align-items:center;gap:16px 22px;margin:1.6em 0 2em;padding:18px 20px;display:grid}.cta strong{font-family:var(--display);margin-bottom:.2em;font-size:1.12rem;font-weight:700;display:block}.cta span{font-size:.93rem;line-height:1.45;display:block}.cta .btn{white-space:nowrap}.cta-blue{background:var(--blue-soft);border:1px solid #c9d7f7}.cta-blue span{color:var(--ink-2)}.cta-stone{background:var(--stone);color:var(--stone-ink);border:1px solid #d9cbae}.cta-stone strong{color:var(--ink)}.cta-stone .btn{background:var(--ink)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .cta-blue{border-color:#2a4380}:root:not([data-theme=light]) .cta-stone{border-color:#5c4e30}:root:not([data-theme=light]) .cta-stone strong{color:#f4ead5}}@media (width<=640px){.cta{grid-template-columns:1fr;padding:16px}.cta .btn{justify-content:center;width:100%}}.fab{z-index:40;display:none;position:fixed;bottom:14px;left:16px;right:16px}.fab a{background:var(--blue);color:#fff;border-radius:999px;justify-content:center;align-items:center;gap:.5em;padding:.85em 1em;font-weight:600;text-decoration:none;display:flex;box-shadow:0 10px 30px #0038b859}@media (width<=760px){.fab.show{display:block}body.has-fab{padding-bottom:70px}}.aff{border:2px solid var(--ink);border-radius:var(--r-m);background:var(--paper);margin:1.8em 0 2.2em;padding:22px 24px;position:relative}.aff-brand{letter-spacing:.02em;color:var(--blue);margin:0 0 .3em;font-size:.8rem;font-weight:600}.aff strong{font-family:var(--display);margin-bottom:.4em;font-size:1.25rem;line-height:1.25;display:block}.aff p{margin:0 0 .8em;font-size:.97rem}.aff ul{margin:0 0 1em;padding-left:1.1em;font-size:.95rem}.aff ul li{margin:.25em 0}.aff .btn{margin-top:.2em}.aff-disclosure{color:var(--ink-2);margin:1em 0 0!important;font-size:.8rem!important}@media (width<=640px){.aff{padding:18px}.aff .btn{justify-content:center;width:100%}}.tc-rate{border:1px solid var(--line);border-radius:var(--r-s);background:var(--mist);font-variant-numeric:tabular-nums;padding:10px 12px}.tc-list{flex-direction:column;gap:10px;margin-top:18px;display:flex}.tc-card{border:1px solid var(--line);border-radius:var(--r-m);background:var(--paper);grid-template-columns:1.6fr 1fr 1fr auto;align-items:center;gap:10px 18px;padding:14px 16px;transition:border-color .15s,box-shadow .15s;display:grid}.tc-card:hover{border-color:var(--line-strong)}.tc-card.is-pick{border:2px solid var(--blue);background:var(--blue-soft);box-shadow:0 10px 30px #0038b81a}.tc-id{align-items:center;gap:12px;min-width:0;display:flex}.tc-id strong{font-family:var(--display);font-size:1.12rem;line-height:1.2;display:block}.tc-logo{object-fit:cover;border:1px solid var(--line);background:#fff;border-radius:12px;flex:none;width:44px;height:44px}.tc-logo-txt{font-family:var(--display);color:var(--ink);background:var(--mist);place-items:center;font-weight:700;display:grid}.tc-badges{flex-wrap:wrap;gap:4px;margin-top:4px;display:flex}.tc-badge{letter-spacing:.01em;color:#fff;background:var(--green);border-radius:999px;padding:2px 8px;font-size:.7rem;font-weight:600;display:inline-block}.tc-badge-pick{background:var(--blue)}.tc-badge-partner{color:var(--muted);border:1px solid var(--line-strong);background:0 0}.tc-badge[hidden]{display:none}.tc-num{font-variant-numeric:tabular-nums}.tc-num .tc-label{color:var(--muted);margin-bottom:2px;font-size:.72rem;display:block}.tc-num b{font-size:1.15rem}.tc-num small{color:var(--muted);font-size:.8rem;display:block}.tc-pros{border-top:1px dashed var(--line);flex-wrap:wrap;grid-column:1/-1;gap:6px;margin:0;padding:8px 0 0;font-size:.82rem;list-style:none;display:flex}.tc-pros li{background:var(--mist);color:var(--ink-2);border-radius:999px;align-items:center;gap:6px;padding:3px 10px 3px 8px;display:inline-flex}.tc-pros li:before{content:"";background:var(--green);border-radius:50%;flex:none;width:7px;height:7px}.tc-pros .tc-delivery{color:var(--muted);background:0 0}.tc-pros .tc-delivery:before{background:var(--line-strong)}.tc-card.is-pick .tc-pros li{background:#fff}.tc-card.is-pick .tc-pros{border-top-color:#c9d7f7}.tc-action .btn{white-space:nowrap;padding:.6em 1em;font-size:.9rem}.btn-ghost{color:var(--blue);border:1px solid var(--line-strong);background:0 0}.btn-ghost:hover{background:var(--blue-soft)}.tc-card.is-pick .btn-ghost{background:#fff}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .tc-card.is-pick{background:#12204a}:root:not([data-theme=light]) .tc-card.is-pick .btn-ghost{background:0 0}}@media (width<=640px){.tc-card{grid-template-columns:1fr 1fr}.tc-id,.tc-pros,.tc-action{grid-column:1/-1}.tc-action .btn{justify-content:center;width:100%}}.vid{margin:0 0 2em}.vid video{aspect-ratio:16/9;border-radius:var(--r-m);background:var(--ink);width:100%;display:block;box-shadow:0 20px 50px #0b1d3f26}.vid video.portrait{aspect-ratio:4/5}.vid figcaption{color:var(--muted);margin-top:8px;font-size:.85rem}:root{--terra:#b8502b;--terra-soft:#fbefe9}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--terra:#e07a52;--terra-soft:#2a1a12}}.sister{border:1px solid var(--line-strong);border-left:4px solid var(--terra);border-radius:var(--r-m);background:var(--paper);margin:2.2em 0 2.4em;padding:20px 22px 22px}.sister-head{align-items:center;gap:10px;margin-bottom:.7em;display:flex}.sister-logo{flex:none;width:26px;height:26px}.sister-eyebrow{letter-spacing:.02em;color:var(--terra);margin:0;font-size:.78rem;font-weight:600}.sister-title{font-family:var(--display);color:var(--ink);margin:0 0 .35em;font-size:1.25rem;line-height:1.25}.sister-text{color:var(--ink-2);margin:0 0 1em;font-size:.95rem}.sister-links{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px;display:grid}.sister-links a{border:1px solid var(--line);border-radius:var(--r-s);background:var(--mist);color:var(--ink);padding:12px 14px;text-decoration:none;transition:border-color .12s,background .12s;display:block}.sister-links a:hover{border-color:var(--terra);background:var(--terra-soft)}.sister-links strong{margin-bottom:.25em;font-size:.95rem;line-height:1.3;display:block}.sister-links strong span{color:var(--terra);font-weight:400}.sister-links a>span{color:var(--muted);font-size:.85rem;line-height:1.4;display:block}.sister-compact{margin:0}@media (width<=640px){.sister{padding:16px}.sister-links{grid-template-columns:1fr}}
