:root{--paper:#fbfbf7;--grid:#17233b0e;--ink:#17233b;--ink-soft:#4a5570;--line:#dfe2d9;--blue:#2450d8;--blue-soft:#eef1fc;--red:#d9382c;--card:#fff;--radius:10px;--mono:ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;--sans:system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}body{font-family:var(--sans);color:var(--ink);background-color:var(--paper);background-image:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);background-size:24px 24px;margin:0;font-size:16px;line-height:1.6}a{color:var(--blue);text-underline-offset:3px}a:hover{color:var(--red)}:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:4px}.skip-link{background:var(--ink);color:#fff;z-index:100;padding:8px 16px;position:absolute;left:-9999px}.skip-link:focus{top:8px;left:8px}.container{max-width:1080px;margin:0 auto;padding:0 20px}.site-header{border-bottom:2px solid var(--ink);background:var(--paper)}.site-header .container{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;min-height:64px;display:flex}.logo{letter-spacing:-.02em;color:var(--ink);font-size:22px;font-weight:800;text-decoration:none}.logo em{color:var(--red);font-style:normal}.site-nav{flex-wrap:wrap;gap:18px;display:flex}.site-nav a{color:var(--ink-soft);align-items:center;min-height:44px;padding:6px 2px;font-size:15px;text-decoration:none;display:inline-flex}.site-nav a:hover{color:var(--red)}@media (width<=720px){.site-header .container{flex-flow:column;align-items:stretch;gap:0;min-height:0;padding-top:10px}.logo{font-size:20px}.site-nav{-webkit-overflow-scrolling:touch;scrollbar-width:none;flex-wrap:nowrap;gap:4px;margin:2px -20px 0;padding:0 20px 6px;overflow-x:auto}.site-nav::-webkit-scrollbar{display:none}.site-nav a{white-space:nowrap;padding:6px 10px;font-size:14.5px}}.breadcrumbs ol li,.breadcrumbs a{align-items:center;min-height:32px;display:inline-flex}.site-footer{border-top:2px solid var(--ink);color:var(--ink-soft);margin-top:72px;padding:28px 0 40px;font-size:14px}.site-footer .container{flex-wrap:wrap;justify-content:space-between;gap:16px;display:flex}.site-footer a{color:var(--ink-soft)}.hero{padding:56px 0 32px}.hero h1{letter-spacing:-.03em;max-width:640px;margin:0 0 12px;font-size:clamp(30px,5vw,46px);line-height:1.12}.hero h1 mark{color:var(--red);background:0 0}.hero p{color:var(--ink-soft);max-width:560px;margin:0;font-size:18px}.category-label{font-family:var(--mono);text-transform:uppercase;letter-spacing:.14em;color:var(--red);border-bottom:2px solid var(--red);margin:44px 0 14px;padding-bottom:6px;font-size:17px;font-weight:700;display:inline-block}.tool-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:0;padding:0;list-style:none;display:grid}.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);height:100%;color:var(--ink);flex-direction:column;min-height:44px;padding:18px 18px 16px;text-decoration:none;transition:border-color .15s,transform .15s;display:flex}.tool-card p{flex:1}.tool-card:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-2px)}.tool-card .tool-icon{color:var(--ink-soft);margin-bottom:10px;transition:color .15s;display:block}.tool-card:hover .tool-icon{color:var(--red)}.tool-card h2,.tool-card h3{letter-spacing:-.01em;margin:0 0 6px;font-size:17px}.tool-card p{color:var(--ink-soft);margin:0;font-size:14px}.breadcrumbs{color:var(--ink-soft);margin:24px 0 8px;font-size:13px}.breadcrumbs ol{flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none;display:flex}.breadcrumbs li+li:before{content:"›";color:var(--line);margin-right:6px}.breadcrumbs a{color:var(--ink-soft)}.tool-page h1{letter-spacing:-.025em;margin:8px 0;font-size:clamp(26px,4vw,38px)}.tool-lede{color:var(--ink-soft);max-width:640px;margin:0 0 24px;font-size:17px}.tool-panel{background:var(--card);border:1px solid var(--ink);border-radius:var(--radius);max-width:640px;padding:24px;box-shadow:4px 4px #17233b1f}.field{flex-direction:column;justify-content:flex-end;margin-bottom:16px;display:flex}.field label{margin-bottom:6px;font-size:14px;font-weight:600;display:block}.field input,.field select{width:100%;font-size:16px;font-family:var(--mono);border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:6px;min-height:44px;padding:10px 12px}.field input:focus,.field select:focus{border-color:var(--blue);outline:2px solid var(--blue-soft)}.field-row{flex-wrap:wrap;align-items:flex-end;gap:12px;display:flex}.field-row .field{flex:140px}.btn{font-size:16px;font-weight:700;font-family:var(--sans);background:var(--ink);color:#fff;cursor:pointer;border:none;border-radius:6px;min-height:44px;padding:12px 22px;display:inline-block}.btn:hover{background:var(--blue)}.btn-ghost{color:var(--ink);border:1px solid var(--ink);background:0 0;margin-left:8px}.btn-ghost:hover{background:var(--blue-soft);color:var(--ink)}.result{border-left:4px solid var(--red);background:var(--blue-soft);border-radius:0 var(--radius) var(--radius) 0;margin-top:20px;padding:16px 18px 16px 22px}.result .result-label{font-family:var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--ink-soft);margin-bottom:4px;font-size:12px}.result .result-value{font-family:var(--mono);font-variant-numeric:tabular-nums;word-break:break-all;font-size:clamp(24px,4vw,34px);font-weight:700;line-height:1.2}.result .result-sub{color:var(--ink-soft);margin-top:6px;font-size:14px}.tool-content{max-width:720px;margin-top:48px}.tool-content h2{letter-spacing:-.02em;border-bottom:1px solid var(--line);margin:36px 0 12px;padding-bottom:6px;font-size:24px}.tool-content p,.tool-content li{color:#2a3550;font-size:16px}.tool-content code{font-family:var(--mono);background:var(--blue-soft);border-radius:4px;padding:2px 6px;font-size:14px}.formula{font-family:var(--mono);background:var(--card);border:1px dashed var(--ink-soft);border-radius:var(--radius);padding:14px 18px;font-size:15px;overflow-x:auto}.faq details{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);margin-bottom:10px;padding:0 16px}.faq summary{cursor:pointer;min-height:44px;padding:14px 0;font-weight:600;list-style-position:inside}.faq details[open] summary{border-bottom:1px solid var(--line)}.faq details p{padding-bottom:14px}.related{margin-top:48px}.related h2{margin-bottom:14px;font-size:20px}.prose{max-width:720px;padding:32px 20px}.prose h1{letter-spacing:-.02em}@media (width<=767px){.tool-panel{padding:18px 14px}.btn-ghost{margin-top:8px;margin-left:0}}@media print{.print-only{display:block!important}.site-header,.site-footer,.breadcrumbs,.no-print,nav,.faq,.related-tools,.embed-cta,button,select,input[type=range]{display:none!important}body{color:#000;background:#fff}.tool-panel{border:none;padding:0}.result{page-break-inside:avoid;border:2px solid #000}.tool-page:after{content:"Calculated with CalcNotebook — calcnotebook.com (free, private, formulas shown)";border-top:1px solid #000;margin-top:24px;padding-top:10px;font-family:ui-monospace,monospace;font-size:11px;display:block}}.site-search{align-items:center;display:flex}@media (width<=720px){.search-hint,.site-search kbd{display:none}.site-header .container{position:relative}.site-search{position:absolute;top:7px;right:12px}.site-search>button{background:0 0!important;border:none!important;min-height:34px!important;padding:6px 8px!important;font-size:19px!important}.site-search:has(input){top:5px;left:12px;right:12px}.site-search input{box-sizing:border-box;width:100%!important;padding:7px 12px!important;font-size:16px!important}.site-search ul,.site-search>div>div{left:0;right:0;width:100%!important}}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}input[type=date],input[type=time],input[type=datetime-local]{cursor:pointer}
