:root{--bg:#fff;--bg-alt:#f5f5f7;--bg-nav:#fbfbfdcc;--dark:#0b1220;--dark-soft:#16233b;--ink:#1d1d1f;--ink-soft:#424245;--ink-muted:#6e6e73;--on-dark:#f5f5f7;--on-dark-muted:#a1a1a6;--accent:#e0632e;--accent-dark:#c14e1f;--accent-soft:#fdefe7;--hairline:#00000014;--hairline-strong:#00000024;--border:#00000014;--shadow-card:0 4px 24px #0000000f;--shadow-card-hover:0 18px 40px #0000001f;--shadow-pop:0 11px 34px #00000029;--maxw:700px;--wrap:1080px;--wrap-wide:1200px;--radius:12px;--radius-lg:18px;--radius-xl:28px;--radius-pill:980px;--ease-out:cubic-bezier(.16, 1, .3, 1);--dur:.6s;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, 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var(--dark), var(--accent));border-radius:6px;width:20px;height:20px;display:inline-block}.nav-links{align-items:center;gap:26px;display:flex}.nav-links a{color:var(--ink);letter-spacing:-.01em;opacity:.8;font-size:.75rem;font-weight:400;text-decoration:none;transition:opacity .2s}.nav-links a:hover{color:var(--ink);opacity:1;text-decoration:none}.nav-links a.btn{color:#fff;opacity:1;font-size:.8125rem}.nav-links a.btn:hover{color:#fff}.nav-dropdown{align-items:center;display:flex;position:relative}.nav-dropdown-toggle{appearance:none;cursor:pointer;font:inherit;letter-spacing:-.01em;color:var(--ink);opacity:.8;background:0 0;border:none;align-items:center;gap:4px;padding:0;font-size:.75rem;font-weight:400;transition:opacity .2s;display:inline-flex}.nav-dropdown-toggle:hover{opacity:1}.nav-caret{transition:transform .2s var(--ease-out)}.nav-dropdown.is-open .nav-caret{transform:rotate(180deg)}.nav-dropdown-menu{backdrop-filter:saturate(180%)blur(20px);border:1px solid 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a:hover{background:#0000000d;text-decoration:none}.nav-menu-title{color:var(--ink);letter-spacing:-.01em;font-size:.9375rem;font-weight:600;display:block}.nav-menu-desc{color:var(--ink-muted);margin-top:2px;font-size:.8125rem;line-height:1.4;display:block}.tool-promo{background:var(--dark);border-radius:var(--radius-lg);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;margin:1.8em 0 2.2em;padding:28px 30px;display:flex}.tool-promo-body{flex:340px}.tool-promo-title{color:#fff;letter-spacing:-.01em;margin:0 0 6px;font-size:1.2rem;font-weight:600}.tool-promo-sub{color:var(--on-dark-muted);margin:0;font-size:.95rem;line-height:1.5}.tool-promo .btn{flex-shrink:0}.prose .tool-promo-title{color:#fff}.prose .tool-promo-sub{color:var(--on-dark-muted)}.prose a.btn{font-weight:500}.prose a.btn:hover{text-decoration:none}.prose a.btn-primary{color:#fff}.prose a.btn-outline{color:var(--ink)}.article{padding-block:44px 72px}.article-head{max-width:var(--maxw);margin-inline:auto;margin-bottom:8px}.eyebrow{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-muted);margin:0 0 12px;font-size:.75rem;font-weight:600}.article-head h1{margin:0 0 16px;font-size:clamp(2rem,4.4vw,3rem);line-height:1.07}.last-reviewed{color:var(--ink-muted);border-bottom:1px solid var(--hairline);margin:0 0 8px;padding-bottom:24px;font-size:.9rem}.key-takeaways{max-width:var(--maxw);background:var(--bg-alt);border-radius:var(--radius-lg);margin:0 auto 2.2em;padding:22px 24px}.key-takeaways-title{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-muted);margin:0 0 12px;font-size:.75rem;font-weight:600}.key-takeaways ul{margin:0;padding-left:1.2em}.key-takeaways li{color:var(--ink-soft);font-size:1.0625rem;line-height:1.5}.key-takeaways li:not(:last-child){margin-bottom:.5em}.key-takeaways li::marker{color:var(--accent)}.prose{max-width:var(--maxw);color:var(--ink);margin-inline:auto;font-size:1.1875rem;line-height:1.58}.prose>*{margin-block:0 1.2em}.prose h2{letter-spacing:-.015em;margin-top:1.8em;padding-top:.1em;font-size:clamp(1.65rem,3vw,2rem);line-height:1.12}.prose h3{margin-top:1.6em;font-size:1.3rem}.prose p{color:var(--ink)}.prose a{color:var(--accent);font-weight:400;text-decoration:none}.prose a:hover{text-decoration:underline}.prose ul,.prose ol{padding-left:1.2em}.prose li{margin-bottom:.5em}.prose li::marker{color:var(--accent)}.prose strong{color:var(--ink);font-weight:600}.prose em{color:var(--ink-soft)}.prose hr{border:none;border-top:1px solid var(--hairline);margin:2.6em 0}.prose blockquote{border-left:3px solid var(--accent);color:var(--ink-soft);margin:1.6em 0;padding:.4em 0 .4em 1.2em;font-size:1.15rem}.prose p em:only-child{color:var(--ink-muted);font-size:.9rem}.prose table{border-collapse:collapse;width:100%;margin:1.8em 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6px;font-size:1.2rem;font-weight:600}.download-callout-sub{color:var(--ink-muted);margin:0;font-size:.95rem;line-height:1.5}.download-callout-actions{flex-wrap:wrap;flex-shrink:0;gap:10px;display:flex}.hero{background:var(--bg);border-bottom:1px solid var(--hairline);overflow:hidden}.hero-inner{text-align:center;max-width:820px;margin-inline:auto;padding-block:clamp(64px,11vw,128px)}.hero-eyebrow{text-transform:uppercase;letter-spacing:.14em;color:var(--ink-muted);margin:0 0 18px;font-size:.75rem;font-weight:600}.hero h1{letter-spacing:-.015em;margin:0 0 22px;font-size:clamp(2.75rem,7vw,5.5rem);font-weight:700;line-height:1.05}.hero .accent{background:linear-gradient(120deg, var(--accent), var(--accent-dark));color:#0000;background-clip:text}.hero-sub{color:var(--ink-muted);max-width:60ch;margin:0 auto 32px;font-size:clamp(1.1875rem,2.4vw,1.35rem);line-height:1.45}.hero-actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:18px;display:flex}.hero-note{color:var(--ink-muted);margin:24px 0 0;font-size:.9rem}.hero-chips{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:26px;display:flex}.chip{color:var(--ink-muted);background:var(--bg-alt);letter-spacing:.01em;border-radius:980px;padding:7px 15px;font-size:.8125rem;font-weight:600}.hero-visual{max-width:760px;margin:clamp(40px,6vw,72px) auto 0}.hero-visual img{width:100%;height:auto;display:block}.section{padding-block:clamp(64px,9vw,104px)}.section-alt{background:var(--bg-alt)}.section-dark{background:var(--dark);color:var(--on-dark)}.section-head{text-align:center;max-width:720px;margin:0 auto 44px}.section-head h2{margin:0 0 14px;font-size:clamp(1.9rem,4vw,2.8rem)}.section-head p{color:var(--ink-muted);margin:0;font-size:1.1875rem;line-height:1.5}.tile-grid{grid-template-columns:repeat(2,1fr);gap:20px;display:grid}.tile-grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.card{background:var(--bg);border-radius:var(--radius-xl);color:inherit;box-shadow:var(--shadow-card);transition:transform .25s var(--ease-out), box-shadow .25s var(--ease-out);flex-direction:column;padding:38px 36px;text-decoration:none;display:flex}.section-alt .card{background:var(--bg)}.card:hover{box-shadow:var(--shadow-card-hover);color:inherit;text-decoration:none;transform:translateY(-4px)}.card-tag{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-muted);align-self:flex-start;margin-bottom:14px;font-size:.72rem;font-weight:600}.card h3{letter-spacing:-.015em;margin:0 0 10px;font-size:1.5rem;font-weight:600;line-height:1.14}.card p{color:var(--ink-muted);flex:1;margin:0 0 20px;font-size:1.0625rem;line-height:1.45}.card .link-more{margin-top:auto}.card-link{color:var(--accent);align-items:center;gap:3px;margin-top:auto;font-size:1.0625rem;font-weight:400;display:inline-flex}.step-grid{grid-template-columns:repeat(3,1fr);gap:32px;max-width:960px;margin-inline:auto;display:grid}.step{padding:0 4px}.step-numeral{letter-spacing:.04em;color:var(--accent);margin:0 0 10px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.85rem;font-weight:600}.step h3{margin:0 0 8px}.step p:last-child{color:var(--ink-muted);margin:0;font-size:1.0625rem;line-height:1.5}.feature-band{text-align:center;max-width:820px;margin-inline:auto}.feature-numeral{letter-spacing:-.03em;color:#fff;margin:0;font-size:clamp(2.4rem,6vw,4.2rem);font-weight:700;line-height:1.04}.feature-band .eyebrow{color:var(--on-dark-muted)}.feature-lead{color:var(--on-dark-muted);letter-spacing:-.005em;max-width:52ch;margin:20px auto 28px;font-size:clamp(1.15rem,2.4vw,1.4rem);font-weight:400;line-height:1.45}.feature-band .link-more{font-size:1.1875rem}.feature-links{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px 28px;display:flex}.stat-grid{grid-template-columns:repeat(3,1fr);gap:24px;max-width:960px;margin-inline:auto;display:grid}.stat{text-align:center;padding:20px 12px}.stat-num{letter-spacing:-.03em;color:var(--ink);margin:0;font-size:clamp(3.25rem,8vw,5.5rem);font-weight:700;line-height:1}.stat-num .unit{letter-spacing:-.01em;font-size:.5em;font-weight:600}.stat-cap{color:var(--ink-muted);max-width:26ch;margin:14px auto 0;font-size:1.0625rem;line-height:1.45}.stat-source{text-align:center;color:var(--ink-muted);max-width:60ch;margin:40px auto 0;font-size:.85rem}.cta-strip{background:var(--dark);color:#fff;border-radius:var(--radius-xl);text-align:center;padding:72px 40px}.cta-strip h2{color:#fff;margin:0 0 16px;font-size:clamp(2rem,4.5vw,3.2rem)}.cta-strip p{color:var(--on-dark-muted);max-width:54ch;margin:0 auto 28px;font-size:1.1875rem;line-height:1.5}.page-head{max-width:var(--wrap);text-align:center;margin:0 auto;padding-block:clamp(48px,8vw,88px) clamp(8px,2vw,20px)}.page-head h1{letter-spacing:-.015em;margin:0 0 18px;font-size:clamp(2.5rem,6vw,4.2rem)}.page-head p{color:var(--ink-muted);max-width:60ch;margin:0 auto;font-size:1.25rem;line-height:1.45}.page{padding-block:44px 80px}.page .prose h2{margin-top:1.8em}.page .article-head{max-width:var(--maxw);margin-inline:auto}.site-footer{background:var(--bg-alt);color:var(--ink-muted);border-top:1px solid var(--hairline);margin-top:auto;padding-block:40px 28px;font-size:.75rem;line-height:1.5}.footer-inner{border-bottom:1px solid var(--hairline);flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:32px;padding-bottom:22px;display:flex}.footer-brand strong{color:var(--ink);font-size:.9rem;font-weight:600}.footer-brand p{color:var(--ink-muted);margin:6px 0 0}.footer-col-title{color:var(--ink);margin:0 0 10px;font-size:.75rem;font-weight:600}.footer-groups{flex-wrap:wrap;gap:36px 56px;display:flex}.footer-col{flex-direction:column;gap:9px;display:flex}.footer-col a{color:var(--ink-muted);font-size:.75rem;text-decoration:none}.footer-col a:hover{color:var(--ink);text-decoration:underline}.footer-links{flex-wrap:wrap;gap:9px 24px;display:flex}.footer-links a{color:var(--ink-muted);font-size:.75rem;text-decoration:none}.footer-links a:hover{color:var(--ink);text-decoration:underline}.footer-legal{padding-top:18px}.footer-legal .muted{color:var(--ink-muted)}.breadcrumb{max-width:var(--maxw);margin-inline:auto;margin-bottom:12px}.breadcrumb ol{color:var(--ink-muted);flex-wrap:wrap;gap:6px;margin:0;padding:0;font-size:.82rem;list-style:none;display:flex}.breadcrumb li{align-items:center;gap:6px;display:flex}.breadcrumb li:not(:last-child):after{content:"/";color:var(--hairline-strong);margin-left:6px}.breadcrumb a{color:var(--ink-muted);text-decoration:none}.breadcrumb a:hover{color:var(--accent);text-decoration:underline}.breadcrumb [aria-current=page]{color:var(--ink);font-weight:500}.tool-lede{max-width:var(--maxw);color:var(--ink-soft);margin-inline:auto;margin-bottom:16px;font-size:1.1875rem;line-height:1.5}.tool-privacy-note{background:var(--bg-alt);color:var(--ink-soft);border-radius:var(--radius-pill);align-items:center;gap:8px;margin:0;padding:8px 16px;font-size:.85rem;display:inline-flex}.sirs-tool{max-width:var(--maxw);background:var(--bg);border-radius:var(--radius-xl);box-shadow:var(--shadow-card);margin:26px auto 8px;padding:36px 38px 38px}.sirs-progress{margin-bottom:26px}.sirs-progress-bar{border-radius:var(--radius-pill);background:#00000014;height:4px;overflow:hidden}.sirs-progress-fill{background:var(--accent);border-radius:var(--radius-pill);height:100%;transition:width .45s var(--ease-out);display:block}.sirs-progress-label{letter-spacing:.04em;text-transform:uppercase;color:var(--ink-muted);margin:10px 0 0;font-size:.75rem;font-weight:600}.sirs-qnum{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-muted);margin:0 0 10px;font-size:.75rem;font-weight:600}.sirs-qtitle{letter-spacing:-.015em;outline:none;margin:0 0 12px;font-size:clamp(1.5rem,3vw,2rem);font-weight:600;line-height:1.15}.sirs-qhelp{color:var(--ink-muted);margin:0 0 24px;font-size:1.0625rem;line-height:1.5}.sirs-answers{grid-template-columns:1fr 1fr;gap:14px;margin-top:8px;display:grid}.sirs-answer{appearance:none;border:1.5px solid var(--hairline-strong);background:var(--bg);border-radius:var(--radius-pill);cursor:pointer;font:inherit;color:var(--ink);text-align:center;transition:border-color .2s ease, background .2s ease, transform .2s var(--ease-out), box-shadow .2s ease, color .2s ease;justify-content:center;align-items:center;min-height:68px;padding:22px 16px;display:flex}.sirs-answer:hover{border-color:var(--accent);background:var(--accent);color:#fff;box-shadow:var(--shadow-card);transform:translateY(-2px)}.sirs-answer:active{transform:translateY(0)}.sirs-answer:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.sirs-answer-key{font-size:1.1875rem;font-weight:600}.sirs-multi{gap:10px;margin-top:4px;display:grid}.sirs-check{border:1.5px solid var(--hairline);border-radius:var(--radius-lg);cursor:pointer;background:var(--bg);align-items:flex-start;gap:12px;padding:16px 18px;transition:border-color .18s,background .18s;display:flex}.sirs-check:hover{border-color:var(--hairline-strong);background:var(--bg-alt)}.sirs-check.is-checked{border-color:var(--accent);background:var(--accent-soft)}.sirs-check input{opacity:0;width:1px;height:1px;position:absolute}.sirs-check-box{border:2px solid var(--ink-muted);border-radius:7px;flex-shrink:0;width:22px;height:22px;margin-top:1px;transition:background .15s,border-color 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