:root{--blue:#2f6bff;--blue2:#1748c7;--green:#16a36a;--ink:#0a0a0b;--muted:#60646c;--line:#e5e7eb;--paper:#fafafa;--soft:#f3f6ff;--lime:#effbf5;--sans:"Geist",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--mono:"Geist Mono",ui-monospace,monospace}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-underline-offset:3px}
img{max-width:100%;height:auto}
.shell{width:min(1120px,calc(100% - 40px));margin-inline:auto}
.top-mark{padding:26px 0 0}
.brand-lockup{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:750;text-decoration:none;letter-spacing:-.025em}
.brand-lockup i{width:11px;height:11px;border-radius:50%;background:var(--blue);box-shadow:18px 0 0 #86a8ff;display:inline-block;margin-right:18px}
.article-hero{position:relative;overflow:hidden;padding:70px 0 78px}
.article-hero:before,.article-hero:after{content:"";position:absolute;border-radius:50%;filter:blur(1px);pointer-events:none}
.article-hero:before{width:480px;height:480px;right:-170px;top:-230px;background:radial-gradient(circle,rgba(47,107,255,.18),rgba(47,107,255,0) 68%)}
.article-hero:after{width:360px;height:360px;left:-200px;bottom:-250px;background:radial-gradient(circle,rgba(22,163,106,.12),rgba(22,163,106,0) 70%)}
.article-hero .shell{position:relative;z-index:1}
.eyebrow{font:650 11px/1.2 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
h1{max-width:900px;font-size:clamp(2.35rem,6vw,5.25rem);line-height:.98;letter-spacing:-.06em;margin:19px 0 24px}
.lede{max-width:760px;font-size:clamp(1.08rem,2vw,1.32rem);color:var(--muted);line-height:1.55}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 23px;border-radius:999px;font-weight:650;text-decoration:none;border:1.5px solid var(--ink);transition:.2s ease}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--blue);border-color:var(--blue);transform:translateY(-2px)}
.btn-ghost{color:var(--ink);background:rgba(255,255,255,.7)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.answer-box{margin:-2px auto 58px;padding:26px 30px;border-radius:18px;background:var(--soft);border:1px solid #dce5ff;font-size:1.04rem}
.answer-box strong{display:block;font:700 11px/1.2 var(--mono);letter-spacing:.13em;text-transform:uppercase;color:var(--blue);margin-bottom:9px}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:70px;align-items:start}
.prose{min-width:0}
.prose section{padding:8px 0 52px;border-bottom:1px solid var(--line);margin-bottom:46px}
.prose h2{font-size:clamp(1.65rem,3vw,2.55rem);line-height:1.12;letter-spacing:-.04em;margin:0 0 19px}
.prose h3{font-size:1.2rem;letter-spacing:-.02em;margin:30px 0 9px}
.prose p,.prose li{font-size:1.03rem;color:#34373d}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{padding-left:1.3rem;margin:18px 0}
.prose li{margin:10px 0;padding-left:5px}
.prose table{width:100%;border-collapse:separate;border-spacing:0;margin:24px 0;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.prose th,.prose td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{font:650 11px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.08em;background:var(--paper)}
.prose tr:last-child td{border-bottom:0}
.callout{padding:22px 24px;border-left:4px solid var(--green);background:var(--lime);border-radius:0 14px 14px 0;margin:24px 0}
.callout p:last-child{margin-bottom:0}
.step-list{counter-reset:steps;list-style:none!important;padding:0!important}
.step-list li{position:relative;padding:20px 20px 20px 68px!important;border:1px solid var(--line);border-radius:15px;margin:12px 0!important}
.step-list li:before{counter-increment:steps;content:counter(steps);position:absolute;left:20px;top:18px;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:#fff;font:700 12px var(--mono)}
.side-card{position:sticky;top:24px;padding:24px;border:1px solid var(--line);border-radius:18px;background:var(--paper)}
.side-card strong{font-size:1.05rem}
.side-card ul{list-style:none;padding:0;margin:16px 0 0}
.side-card li{border-top:1px solid var(--line);padding:11px 0}
.side-card a{color:var(--ink);text-decoration:none;font-size:.92rem}
.side-card a:hover{color:var(--blue)}
.source-note{font-size:.86rem!important;color:var(--muted)!important}
.tool{padding:30px;border:1px solid var(--line);border-radius:20px;background:var(--paper);margin:0 0 46px}
.tool h2{margin-top:0}
.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field label,.question legend{display:block;font-weight:650;font-size:.91rem;margin-bottom:7px}
.field input,.field select{width:100%;height:48px;padding:0 14px;border:1px solid #cfd3d9;border-radius:10px;background:#fff;font:inherit}
.tool button{margin-top:20px}
.result{display:none;margin-top:24px;padding:22px;border-radius:14px;background:var(--ink);color:#fff}
.result.show{display:block}
.result strong{font-size:1.35rem}
.question{border:0;padding:0;margin:0 0 26px}
.choices{display:grid;gap:9px}
.choice{display:flex;gap:10px;align-items:flex-start;padding:13px;border:1px solid var(--line);border-radius:11px;background:#fff}
.choice input{margin-top:5px}
.faq{padding:64px 0;background:var(--paper)}
.faq h2{font-size:clamp(1.8rem,4vw,3rem);letter-spacing:-.04em;margin:0 0 28px}
.faq-group+ .faq-group{margin-top:58px;padding-top:54px;border-top:1px solid var(--line)}
details{background:#fff;border:1px solid var(--line);border-radius:13px;margin:10px 0}
summary{cursor:pointer;list-style:none;font-weight:650;padding:19px 48px 19px 20px;position:relative}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";position:absolute;right:20px;top:14px;font-size:1.5rem;color:var(--blue)}
details[open] summary:after{content:"–"}
details p{padding:0 20px 20px;margin:0;color:var(--muted)}
.faq-link{display:inline-block;margin-left:4px;font-weight:650;color:var(--blue);text-decoration:none}
.faq-link:hover{text-decoration:underline}
.related{padding:70px 0}
.related h2{font-size:clamp(1.7rem,3vw,2.5rem);letter-spacing:-.04em}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}
.topic-card{display:block;padding:22px;border:1px solid var(--line);border-radius:16px;color:var(--ink);text-decoration:none;background:#fff;transition:.2s}
.topic-card:hover{transform:translateY(-3px);border-color:#adc0ff;box-shadow:0 18px 38px -30px rgba(10,10,11,.45)}
.topic-card small{font:650 10px var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--blue)}
.topic-card strong{display:block;margin:8px 0 6px;font-size:1.05rem}
.topic-card span{font-size:.9rem;color:var(--muted)}
.final-cta{margin:0 auto 70px;padding:48px;border-radius:22px;background:var(--ink);color:#fff}
.final-cta h2{font-size:clamp(1.7rem,4vw,3rem);line-height:1.05;letter-spacing:-.045em;margin:0 0 14px}
.final-cta p{color:#b8bbc1;max-width:650px}
.final-cta .btn{background:#fff;color:var(--ink);border-color:#fff;margin-top:10px}
.site-footer{background:var(--ink);color:#a8abb2;padding:54px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:38px}
.site-footer .brand-lockup{color:#fff}
.site-footer h3{font:650 10px var(--mono);text-transform:uppercase;letter-spacing:.13em;color:#71757e}
.site-footer ul{list-style:none;padding:0}
.site-footer li{margin:9px 0}
.site-footer a{color:#cdd0d6;text-decoration:none}
.site-footer a:hover{color:#fff}
.footer-base{border-top:1px solid #24252a;margin-top:35px;padding-top:22px;font-size:.82rem;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:850px){.article-grid{grid-template-columns:1fr}.side-card{position:static;order:-1}.card-grid{grid-template-columns:1fr 1fr}.field-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:560px){.shell{width:min(100% - 28px,1120px)}.top-mark{padding-top:20px}.article-hero{padding:50px 0 58px}h1{font-size:2.55rem}.answer-box{padding:21px;margin-bottom:42px}.card-grid{grid-template-columns:1fr}.final-cta{padding:30px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.prose th,.prose td{padding:11px;font-size:.86rem}.tool{padding:21px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}