@font-face{font-family:Space Grotesk;src:url(assets/fonts/space-grotesk-400.ttf) format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:Space Grotesk;src:url(assets/fonts/space-grotesk-700.ttf) format('truetype');font-weight:700;font-display:swap}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:#fbfbfd;color:#1d1d1f;font-family:Space Grotesk,Arial,sans-serif;font-size:16px;line-height:1.7}a{color:#0066cc;text-underline-offset:4px}a:focus-visible,input:focus-visible,select:focus-visible,button:focus-visible{outline:3px solid #0071e3;outline-offset:4px}.guide-header{padding:24px max(24px,calc((100vw - 1200px)/2));display:flex;align-items:center;justify-content:space-between;gap:24px;background:#fff;border-bottom:1px solid #e5e7eb}.brand{color:#1d1d1f;text-decoration:none;font-weight:700;font-size:20px;letter-spacing:-.06em}.brand span{font-weight:400}.guide-header>a:last-child{font-size:13px;text-decoration:none}main{max-width:1248px;padding:0 24px;margin:auto}.guide-hero{padding:110px 0 70px;max-width:1060px}.eyebrow{color:#0066cc;font-size:11px;font-weight:700;letter-spacing:.15em;margin:0 0 20px}h1{font-size:clamp(46px,7vw,94px);line-height:1.04;letter-spacing:-.065em;margin:0 0 34px}h2{font-size:clamp(32px,4vw,54px);line-height:1.12;letter-spacing:-.05em;margin:0 0 24px}h3{font-size:22px;line-height:1.3;letter-spacing:-.025em;margin:0 0 20px}p{margin:0 0 20px}.lead{font-size:24px;line-height:1.5;max-width:720px;color:#6e6e73}.scope{max-width:760px;font-size:13px;color:#6e6e73}.topic-nav{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}.topic-nav a{padding:10px 17px;border:1px solid #e5e7eb;border-radius:24px;background:#fff;font-size:13px;text-decoration:none;transition:box-shadow .5s cubic-bezier(.16,1,.3,1),transform .5s cubic-bezier(.16,1,.3,1)}.topic-nav a:hover{transform:translateY(-3px);box-shadow:0 8px 20px #00000008}.section{padding:72px 0;border-top:1px solid #e5e7eb}.section-heading{max-width:780px}.section-heading>p:last-child{color:#6e6e73}.card{padding:40px;background:#fff;border:1px solid #e5e7eb;border-radius:20px;box-shadow:0 4px 6px -1px #00000005,0 2px 4px -1px #00000005;min-width:0}.two-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px}.calculator{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;margin:36px 0 28px}form{display:grid;grid-template-columns:1fr 1fr;gap:20px}label{display:flex;flex-direction:column;gap:8px;font-size:12px;color:#6e6e73}input,select{width:100%;min-width:0;padding:12px;border:1px solid #d2d2d7;border-radius:10px;background:#fff;color:#1d1d1f;font:inherit;font-size:16px}button,.button{display:inline-block;padding:14px 20px;border-radius:12px;border:0;background:#0071e3;color:#fff;text-decoration:none;font:700 14px Space Grotesk,Arial,sans-serif;cursor:pointer;transition:background .5s cubic-bezier(.16,1,.3,1),transform .5s cubic-bezier(.16,1,.3,1)}button:hover,.button:hover{background:#0066cc;transform:translateY(-3px)}.results{background:#fbfbfd;border-radius:14px;padding:28px;align-self:start}.results>div{padding:16px 0;border-bottom:1px solid #e5e7eb}.results>div:last-child{border:0}.results span,.results small{display:block;color:#6e6e73;font-size:12px}.results output{display:block;font-size:36px;font-weight:700;letter-spacing:-.04em;overflow-wrap:anywhere}#calculatorError{color:#b42318;font-size:13px;margin:0}.formula-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.formula-grid .card{padding:28px}.formula-grid p{font-size:13px;margin:20px 0 0}code{font-family:Space Grotesk,Arial,sans-serif;font-size:14px;white-space:normal;overflow-wrap:anywhere;color:#0066cc}.source-line{font-size:12px;color:#6e6e73;margin:24px 0 0}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:13px}caption{text-align:left;color:#6e6e73;font-size:12px;padding:12px 0}th{background:#fbfbfd;font-weight:700}th,td{padding:15px 12px;border-bottom:1px solid #e5e7eb;vertical-align:top}li{margin-bottom:12px}.editorial-note{max-width:820px;font-size:14px;color:#6e6e73;margin-top:28px}.sources{padding-left:25px}.sources li{padding:16px 0 16px 12px;border-bottom:1px solid #e5e7eb}.sources a{font-weight:700;font-size:16px}.sources span{display:block;font-size:13px;color:#6e6e73;margin-top:6px}.closing{margin:20px 0 80px;padding:64px}.closing p{max-width:700px}footer{padding:30px 24px;text-align:center;color:#6e6e73;border-top:1px solid #e5e7eb;font-size:12px}[hidden]{display:none!important}@media(max-width:900px){.calculator,.two-columns{grid-template-columns:1fr}.formula-grid{grid-template-columns:1fr}.guide-hero{padding-top:70px}.section{padding-block:52px}.calculator{gap:24px}.card{padding:28px}}@media(max-width:480px){main{padding:0 16px}.guide-header{padding:20px 16px}.brand{font-size:16px}form{grid-template-columns:1fr}.lead{font-size:20px}.card{padding:24px}.closing{padding:32px}.guide-header>a:last-child{font-size:11px}.topic-nav{gap:8px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{.guide-header,.topic-nav,.calculator,.closing{display:none}body{background:#fff;font-size:11pt}.guide-hero,.section{padding:20px 0}.two-columns,.formula-grid{display:block}.card{box-shadow:none;padding:20px;break-inside:avoid;margin:10px 0}h1{font-size:36pt}h2{font-size:24pt}.sources a{font-size:11pt}a{color:#1d1d1f}main{max-width:none}}