:root{--accent:#1d4ed8;--accent-ink:#fff;--accent-soft:color-mix(in srgb, var(--accent) 8%, #fff);--accent-line:color-mix(in srgb, var(--accent) 28%, #fff);--ink:#0f172a;--text:#1e293b;--muted:#526075;--line:#e2e8f0;--bg:#fff;--soft:#f6f8fb;--warn-bg:#fff7e6;--warn-line:#f1c26b;--radius:10px;--wrap:72rem;--prose:44rem;--font:ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;color-scheme:light}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:5rem}body{font-family:var(--font);color:var(--text);background:var(--bg);margin:0;font-size:1.0625rem;line-height:1.65;overflow-x:hidden}img{max-width:100%;height:auto}a{color:var(--accent);text-underline-offset:2px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid color-mix(in srgb, var(--accent) 60%, #fff);outline-offset:2px}h1,h2,h3,h4{color:var(--ink);letter-spacing:-.01em;line-height:1.2}h1{margin:.2em 0 .4em;font-size:clamp(1.9rem,1.4rem + 2vw,2.75rem)}h2{margin:2em 0 .5em;font-size:clamp(1.4rem,1.2rem + .8vw,1.75rem)}h3{margin:1.6em 0 .4em;font-size:1.2rem}.wrap{max-width:var(--wrap);margin:0 auto;padding:0 1rem}.narrow{max-width:calc(var(--prose) + 2rem)}.muted{color:var(--muted)}.small{font-size:.9rem}.skip{position:absolute;left:-999px}.skip:focus{z-index:100;background:#fff;padding:.5rem 1rem;top:1rem;left:1rem}.btn{border:2px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:inherit;cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:.4em;padding:.7rem 1.15rem;font-size:.98rem;font-weight:650;line-height:1.2;text-decoration:none;transition:filter .15s;display:inline-flex}.btn:hover{filter:brightness(1.08)}.btn-ghost{color:var(--accent);background:0 0}.btn-sm{padding:.45rem .85rem;font-size:.9rem}.btn-lg{padding:.9rem 1.4rem;font-size:1.05rem}.btn[disabled]{opacity:.6;cursor:wait}.site-header{z-index:50;backdrop-filter:saturate(1.4)blur(6px);border-bottom:1px solid var(--line);background:#fffffff5;position:sticky;top:0}.header-row{align-items:center;gap:1rem;min-height:4rem;display:flex}.brand{color:var(--ink);align-items:center;gap:.6rem;margin-right:auto;font-weight:750;text-decoration:none;display:flex}.brand-name{font-size:1.05rem}.main-nav>ul{align-items:center;gap:.25rem;margin:0;padding:0;list-style:none;display:flex}.main-nav a,.main-nav summary{color:var(--ink);cursor:pointer;white-space:nowrap;border-radius:6px;padding:.5rem .7rem;font-size:.95rem;text-decoration:none;display:block}.main-nav a.btn{color:var(--accent-ink);margin-left:.4rem}.main-nav summary{list-style:none}.main-nav summary::-webkit-details-marker{display:none}.main-nav summary:after{content:"";border:4px solid #0000;border-top-color:currentColor;margin-left:.4em;display:inline-block;transform:translateY(2px)}.main-nav a:hover,.main-nav summary:hover{background:var(--soft)}.main-nav [aria-current=page]{color:var(--accent);font-weight:650}.has-sub{position:relative}.sub{border:1px solid var(--line);border-radius:var(--radius);background:#fff;min-width:17rem;margin:0;padding:.4rem;list-style:none;position:absolute;top:calc(100% + 6px);left:0;box-shadow:0 12px 30px #0f172a1f}.sub a{white-space:normal}.lang-switch{font-weight:600}.menu-toggle{display:none}.menu-toggle summary{cursor:pointer;gap:4px;padding:.6rem;list-style:none;display:grid}.menu-toggle summary::-webkit-details-marker{display:none}.menu-toggle summary span{background:var(--ink);width:22px;height:2px;display:block}@media (width<=960px){.menu-toggle{display:block}.main-nav{border-bottom:1px solid var(--line);background:#fff;max-height:calc(100vh - 4rem);display:none;position:absolute;top:100%;left:0;right:0;overflow-y:auto}body.nav-open .main-nav{display:block}.main-nav>ul{flex-direction:column;align-items:stretch;padding:.5rem 1rem 1rem}.sub{box-shadow:none;border:0;padding:0 0 0 .75rem;position:static}.main-nav a.btn{margin:.5rem 0 0}}.hero{background:linear-gradient(180deg, var(--accent-soft), #fff);border-bottom:1px solid var(--line);padding:3.5rem 0 3rem}.hero h1{max-width:48rem}.lede{color:var(--text);max-width:44rem;font-size:1.2rem}.hero-actions{flex-wrap:wrap;gap:.75rem;margin:1.5rem 0 1rem;display:flex}.paths{grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));gap:1rem;margin-top:2rem;display:grid}.path-card{border:1px solid var(--line);border-radius:var(--radius);color:var(--text);background:#fff;padding:1.25rem 1.25rem 2.5rem;text-decoration:none;transition:border-color .15s,box-shadow .15s;display:block;position:relative}.path-card:hover{border-color:var(--accent-line);box-shadow:0 8px 24px #0f172a14}.path-card h2{margin:0 0 .4rem;font-size:1.15rem}.path-card p{margin:0;font-size:.97rem}.path-card .arrow{color:var(--accent);font-weight:700;position:absolute;bottom:.8rem;right:1.1rem}.home-prose{margin:2.5rem 0 0}.crumbs ol{color:var(--muted);flex-wrap:wrap;gap:.25rem;margin:1.25rem 0 0;padding:0;font-size:.88rem;list-style:none;display:flex}.crumbs li+li:before{content:"/";color:var(--line);margin-right:.25rem}.crumbs a{color:var(--muted)}.page-head{margin:.5rem 0 1.5rem}.byline{margin:0 0 1rem}.answer{border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 var(--radius) var(--radius) 0;margin:1rem 0;padding:.9rem 1.1rem}.answer p{margin:0}.answer-label{text-transform:uppercase;letter-spacing:.06em;color:var(--accent);font-size:.78rem;font-weight:700;margin-bottom:.25rem!important}.disclosure-line,.ymyl-line{color:var(--muted);margin:.6rem 0;font-size:.88rem}.ymyl-line{background:var(--warn-bg);border:1px solid var(--warn-line);color:#5b4100;border-radius:8px;padding:.55rem .8rem}.article-grid{grid-template-columns:minmax(0,1fr);gap:3rem;display:grid}@media (width>=1080px){.article-grid{grid-template-columns:minmax(0, var(--prose)) 17rem;justify-content:space-between}.toc-inline{display:none}}.side{display:none}@media (width>=1080px){.side{display:block}}.side-sticky{gap:1.25rem;margin-top:1rem;display:grid;position:sticky;top:5.5rem}.side-title{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 .5rem;font-size:.78rem;font-weight:700}.toc ol{margin:0;padding-left:1.1rem;font-size:.92rem}.toc li{margin:.3rem 0}.toc a{color:var(--text);text-decoration:none}.toc a:hover{color:var(--accent)}.toc-inline{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:1.5rem;padding:.6rem 1rem}.toc-inline summary{cursor:pointer;font-weight:650}.side-cta{border:1px solid var(--line);border-radius:var(--radius);background:var(--soft);gap:.5rem;padding:1rem;display:grid}.prose{max-width:var(--prose)}.prose p,.prose ul,.prose ol{margin:0 0 1.05em}.prose li{margin:.3em 0}.prose li>p{margin:0}.prose strong{color:var(--ink)}.prose blockquote{border-left:3px solid var(--line);color:var(--muted);margin:1.2em 0;padding:.2em 1rem}.prose table{border-collapse:collapse;width:100%;margin:1.25em 0 1.5em;font-size:.93rem;line-height:1.45;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--line);text-align:left;vertical-align:top;min-width:8rem;padding:.55rem .7rem}.prose th{background:var(--soft);color:var(--ink);font-weight:650}.prose code{background:var(--soft);border-radius:4px;padding:.1em .35em;font-size:.9em}.prose hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}.callout{border:1px solid var(--accent-line);background:var(--accent-soft);border-radius:var(--radius);margin:1.4em 0;padding:.9rem 1.1rem}.callout-warn{border-color:var(--warn-line);background:var(--warn-bg)}.callout>:last-child{margin-bottom:0}.checklist{padding-left:0;list-style:none}.checklist li{padding-left:1.7rem;position:relative}.checklist li:before{content:"";border:2px solid var(--accent);border-radius:3px;width:.95rem;height:.95rem;position:absolute;top:.35em;left:.15rem}.faq details{border-bottom:1px solid var(--line);padding:.8rem 0}.faq summary{cursor:pointer;color:var(--ink);font-weight:650}.faq details p{margin:.5rem 0 0}.quote-block{border:1px solid var(--accent-line);background:linear-gradient(180deg, var(--accent-soft), #fff 60%);border-radius:14px;grid-template-columns:minmax(0,1fr);gap:1.5rem;margin:3rem 0;padding:1.5rem;display:grid}@media (width>=900px){.wrap>.quote-block{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);padding:2rem}}.quote-block h2{margin-top:.2rem}.kicker{text-transform:uppercase;letter-spacing:.06em;color:var(--accent);margin:0;font-size:.8rem;font-weight:700}.book-line{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.qf fieldset{border:0;min-width:0;margin:0;padding:0}.qf legend{color:var(--ink);margin-bottom:.75rem;padding:0;font-weight:700}.qf-grid{grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:.85rem 1rem;display:grid}.qf-grid .wide{grid-column:1/-1}.qf label{color:var(--ink);gap:.3rem;font-size:.93rem;font-weight:600;display:grid}.qf input[type=text],.qf input[type=email],.qf input[type=tel],.qf input[type=number],.qf input[type=date],.qf select,.qf textarea{width:100%;font:inherit;color:var(--text);background:#fff;border:1px solid #c4cdd9;border-radius:8px;padding:.6rem .7rem;font-size:1rem;font-weight:400}.qf [aria-invalid]{background:#fff7f2;border-color:#c2410c}.qf-checks{flex-wrap:wrap;gap:.4rem 1rem;display:flex!important}.qf-checks legend{width:100%;margin-bottom:.2rem;font-size:.93rem;font-weight:600}.qf label.check{align-items:flex-start;gap:.5rem;font-weight:400;display:flex}.qf label.check input{width:1.05rem;height:1.05rem;accent-color:var(--accent);flex:none;margin-top:.3rem}.qf .consent span{color:var(--muted);font-size:.82rem;line-height:1.45}.qf-actions{gap:.6rem;margin:1rem 0 .5rem;display:flex}.qf-msg{color:#9a3412;margin:.75rem 0 0;font-weight:600}.req{color:#b42318}.hp{width:1px;height:1px;position:absolute;left:-9999px;overflow:hidden}.js-only{display:none}.qf.js .js-only{display:inline-flex}.qf.js p.js-only{display:flex}.related-grid{grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:.75rem;padding:0;list-style:none;display:grid}.related-grid a{border:1px solid var(--line);border-radius:var(--radius);height:100%;color:var(--text);gap:.25rem;padding:.9rem 1rem;font-size:.92rem;text-decoration:none;display:grid}.related-grid a:hover{border-color:var(--accent-line)}.related-grid strong{color:var(--accent);font-size:1rem}.author-box{border-top:1px solid var(--line);border-bottom:1px solid var(--line);align-items:flex-start;gap:1rem;margin:2.5rem 0 1.5rem;padding:1.1rem;display:flex}.author-box img,.avatar{object-fit:cover;border-radius:50%;flex:none;width:72px;height:72px}.avatar{background:var(--accent);color:#fff;place-items:center;font-size:1.4rem;font-weight:700;display:grid}.author-box p{margin:.15rem 0}.author-name a{color:var(--ink);font-weight:700}.about-photo{border-radius:50%;margin-bottom:1rem}.sources h2{font-size:1.1rem}.sources ol{overflow-wrap:anywhere;padding-left:1.2rem;font-size:.88rem}.verify-box{border-radius:var(--radius);background:#fffbeb;border:2px dashed #d97706;margin:2rem 0;padding:1rem 1.25rem;font-size:.92rem}.verify-box h2{margin-top:0;font-size:1rem}.tool-wrap{margin:1.5rem 0 2rem}.tool{border:1px solid var(--line);background:var(--soft);border-radius:14px;padding:1.25rem}.tool label{color:var(--ink);gap:.3rem;font-size:.93rem;font-weight:600;display:grid}.tool input,.tool select{font:inherit;background:#fff;border:1px solid #c4cdd9;border-radius:8px;width:100%;padding:.55rem .65rem;font-weight:400}.tool-grid{grid-template-columns:repeat(auto-fit,minmax(12rem,1fr));gap:.85rem 1rem;display:grid}.tool-result{border-radius:var(--radius);border:1px solid var(--accent-line);background:#fff;margin-top:1.25rem;padding:1rem}.tool-result .big{color:var(--ink);font-variant-numeric:tabular-nums;font-size:1.8rem;font-weight:750}.site-footer{background:var(--soft);border-top:1px solid var(--line);margin-top:4rem;padding:2.5rem 0 2rem;font-size:.95rem}.disclosure-foot{border-bottom:1px solid var(--line);padding-bottom:1.25rem}.foot-grid{grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:1.5rem;margin:1.5rem 0;display:grid}.foot-brand{color:var(--ink);margin:0;font-weight:750}.foot-links{margin:0;padding:0;list-style:none}.foot-links li{margin:.35rem 0}.foot-links a{color:var(--text)}.cookie-bar{z-index:60;border:1px solid var(--line);border-radius:var(--radius);background:#fff;flex-wrap:wrap;align-items:center;gap:.6rem;max-width:34rem;padding:.75rem 1rem;font-size:.9rem;display:flex;position:fixed;bottom:1rem;left:1rem;right:1rem;box-shadow:0 10px 30px #0f172a26}.cookie-bar[hidden]{display:none}.cookie-bar p{flex:14rem;margin:0}@media print{.site-header,.site-footer,.side,.quote-block,.cookie-bar{display:none!important}}.site-header .brand .logo{flex:none;width:auto;height:32px;display:block}.site-header .brand .brand-name{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}