@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');
:root{--ink:#0a0a0a;--muted:#626360;--line:#e5e5e2;--soft:#f6f6f4;--blue:#405f93;--pad:clamp(20px,5vw,48px);--max:1160px;--sans:'Instrument Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;--mono:'JetBrains Mono',ui-monospace,monospace}
*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font:17px/1.68 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit}a:focus-visible,summary:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.guide-wrap{max-width:var(--max);margin:auto;padding-inline:var(--pad)}.preview-banner{background:#121212;color:#fff;text-align:center;padding:7px 15px;font:12px var(--mono)}.guide-hero{background:radial-gradient(circle at 82% 12%,#eef2f8 0,transparent 37%),linear-gradient(#fafaf9,#f5f5f3);border-bottom:1px solid var(--line)}.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:10px;padding:29px 0 55px;color:#73736f;font-size:13px}.breadcrumb a{text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 328px;gap:clamp(35px,5vw,88px);align-items:center;padding-bottom:84px}.eyebrow,.card-kicker{margin:0 0 15px;font:500 11px/1.4 var(--mono);text-transform:uppercase;letter-spacing:.11em;color:#69717b}.hero-copy h1{font-size:clamp(39px,5.15vw,70px);line-height:1.06;letter-spacing:-.055em;font-weight:600;margin:0 0 23px;max-width:770px;text-wrap:balance}.hero-lead{font-size:clamp(18px,1.75vw,22px);line-height:1.55;color:#444a4f;margin:0;max-width:740px}.byline{display:flex;align-items:center;gap:10px;margin-top:34px;padding-top:22px;border-top:1px solid #dcdfdf}.byline-mark{display:grid;place-items:center;width:34px;height:34px;background:#0a0a0a;color:#fff;border-radius:7px;font-weight:700}.byline strong{display:block;font-size:13px}.byline small{display:block;font-size:12px;color:#777}.hero-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:27px;box-shadow:0 18px 50px rgba(30,40,55,.05)}.hero-card ul{list-style:none;margin:16px 0 23px;padding:0}.hero-card li{border-top:1px solid var(--line);padding:12px 0 12px 22px;position:relative;font-size:15px;line-height:1.45;font-weight:600}.hero-card li:before{content:'✓';position:absolute;left:0;color:#17834a}.hero-card a,.bottom-cta a{display:flex;justify-content:space-between;gap:12px;align-items:center;background:var(--ink);color:#fff;border-radius:9px;padding:14px 17px;text-decoration:none;font-size:14px;font-weight:700;line-height:1.3}.hero-card a:hover,.bottom-cta a:hover{background:#30333a}.guide-layout{display:grid;grid-template-columns:225px minmax(0,1fr);gap:clamp(34px,5.5vw,85px);padding-top:65px;padding-bottom:80px}.toc{position:sticky;top:82px;align-self:start;display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line);font-size:13px;line-height:1.4}.toc strong{padding:0 0 12px 16px;color:#1d1d1d;font-size:13px}.toc a{text-decoration:none;color:#65686d;padding:9px 12px 9px 16px;border-left:2px solid transparent;margin-left:-1px}.toc a:hover{color:#101010;background:#f6f7f8;border-left-color:var(--blue)}.toc a span{display:inline-block;margin-right:9px;font:11px var(--mono);color:#8e9196}.article{min-width:0}.answer-box{border-left:4px solid var(--blue);background:#f3f5f8;padding:25px 28px;margin-bottom:65px;border-radius:0 12px 12px 0}.answer-box span{font:500 11px var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--blue)}.answer-box p{font-size:19px;line-height:1.55;margin:10px 0 0;font-weight:500}.guide-section{display:grid;grid-template-columns:36px minmax(0,1fr);gap:16px;margin:0 0 64px;scroll-margin-top:90px}.section-number{font:500 12px var(--mono);color:#9a9d9f;padding-top:9px}.article h2,.related h2,.bottom-cta h2{font-size:clamp(27px,3vw,37px);line-height:1.13;letter-spacing:-.035em;font-weight:600;margin:0 0 21px;text-wrap:balance}.article p{color:#34383d;margin:0 0 18px}.guide-list{margin:24px 0 0;padding-left:20px;color:#34383d}.guide-list li{padding:4px 0}.editor-note{background:#111;color:white;border-radius:14px;padding:27px 31px;margin:2px 0 75px}.editor-note strong{font-size:21px}.editor-note p{color:#dbdcdd;margin:9px 0 16px;font-size:15px}.editor-note a{color:white;font-weight:700;font-size:15px}.faq-section,.sources{scroll-margin-top:90px;padding-bottom:64px}.faq-section details{border-top:1px solid var(--line);padding:16px 0}.faq-section details:last-child{border-bottom:1px solid var(--line)}.faq-section summary{font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:15px}.faq-section summary::-webkit-details-marker{display:none}.faq-section summary:after{content:'+';font-size:22px;color:#85898c;line-height:1}.faq-section details[open] summary:after{content:'−'}.faq-section details p{font-size:15px;margin:12px 30px 0 0;color:#565d62}.sources{border-top:1px solid var(--line);padding-top:32px;padding-bottom:0}.sources>p:not(.eyebrow){font-size:14px;color:#666}.sources ul{margin:18px 0 0;padding-left:18px;font-size:14px}.sources li{margin:12px 0}.sources a{color:#234c81;text-decoration:underline}.sources small{display:block;color:#80858b;font-size:12px}.related{background:var(--soft);padding:65px 0 75px}.related h2{max-width:650px}.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;margin-top:30px}.related-card{display:flex;flex-direction:column;gap:12px;background:#fff;border:1px solid var(--line);border-radius:12px;text-decoration:none;padding:22px 24px;min-height:153px}.related-card:hover{border-color:#8195b1;box-shadow:0 8px 26px rgba(0,0,0,.04)}.related-card span:first-child{font:11px var(--mono);text-transform:uppercase;letter-spacing:.07em;color:#848992}.related-card strong{font-size:17px;line-height:1.3}.related-card .arrow{margin-top:auto;font-size:13px;font-weight:600;color:var(--blue)}.bottom-cta{padding:58px 0}.bottom-cta .guide-wrap{display:flex;align-items:center;justify-content:space-between;gap:40px}.bottom-cta h2{margin-bottom:10px}.bottom-cta p:last-child{margin:0;max-width:650px;color:#676b70}.bottom-cta a{flex:none;width:260px}.df-pied{font-family:var(--sans)}@media(max-width:850px){.hero-grid{grid-template-columns:1fr;gap:30px;padding-bottom:55px}.breadcrumb{padding-bottom:35px}.guide-layout{grid-template-columns:1fr;padding-top:35px}.toc{position:static;display:block;border:1px solid var(--line);border-radius:12px;padding:15px}.toc strong{display:block}.toc a{display:inline-block;border:0;margin:0;padding:8px 10px}.toc a span{display:none}}@media(max-width:620px){.hero-copy h1{font-size:38px}.hero-lead{font-size:18px}.byline{margin-top:25px}.guide-layout{gap:38px}.answer-box{padding:21px;margin-bottom:48px}.answer-box p{font-size:17px}.guide-section{grid-template-columns:1fr;gap:1px;margin-bottom:48px}.section-number{padding:0}.related-grid{grid-template-columns:1fr}.bottom-cta .guide-wrap{display:block}.bottom-cta a{width:100%;margin-top:22px}.bottom-cta{padding:48px 0}}

.model-download{display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;margin:0 0 57px;padding:18px 22px;border:1px solid #d7e0ed;border-radius:10px;background:#fbfcff}.model-download a{display:inline-flex;padding:11px 14px;background:#405f93;color:white;text-decoration:none;font-size:14px;font-weight:700;border-radius:7px}.model-download small{font-size:13px;color:#69717b}