:root{color-scheme:light;--bg:#fff;--ink:#0b1736;--muted:#596173;--blue:#1647ff;--line:#d4dae5;--surface:#f4f6fa;--radius:8px;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;font-size:17px;line-height:1.55}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}svg{display:block;flex-shrink:0}button svg,a svg{pointer-events:none}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #7d9aff;outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.15;letter-spacing:-.035em}h1{font-size:48px;font-weight:760}h2{font-size:27px;font-weight:740}h3{font-size:20px;font-weight:700}p{color:var(--muted)}.wrap{max-width:1440px;margin:auto;padding-inline:40px}.site-header{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}.wordmark{display:inline-flex;align-items:center;gap:12px;font-size:29px;font-weight:760;letter-spacing:-.045em;color:var(--ink);white-space:nowrap}.wordmark:hover{text-decoration:none}.wordmark svg{width:36px;height:36px}.header-nav{display:flex;gap:34px;align-items:center}.header-nav a{color:var(--ink);font-weight:600;font-size:17px}.header-nav a[aria-current=page]{color:var(--blue)}.skip-link{position:fixed;top:-100px;left:20px;background:var(--ink);color:#fff;z-index:10;padding:12px}.skip-link:focus{top:12px}.hero{padding:48px 0 34px}.hero p{font-size:20px;margin-top:12px;max-width:1000px}.directory-hero{padding:48px 0 30px}.directory-hero h1{font-size:70px;max-width:1000px;line-height:1.06;letter-spacing:-.045em}.directory-hero p{font-size:23px;margin-top:17px}.tool-group{display:grid;grid-template-columns:190px 1fr;padding:10px 0 0}.tool-group+.tool-group{border-top:1px solid 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p{color:#dfe6f7;margin-top:8px;font-size:19px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:46px;border:1px solid transparent;border-radius:6px;background:var(--blue);color:#fff;padding:10px 21px;font-size:17px;font-weight:650;line-height:1.35;text-align:center}.button:hover{background:#1039d4;text-decoration:none}.button.light{background:#fff;color:var(--blue);white-space:nowrap}.button.light:hover{background:#eff3ff}.button.secondary{background:#fff;border-color:var(--line);color:var(--ink);font-size:15px;min-height:40px}.button.secondary:hover{background:var(--surface)}.workbench{display:grid;grid-template-columns:40% 60%;border:1px solid #aeb7c8;border-radius:var(--radius);overflow:hidden}.inputs{padding:25px 26px 27px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:19px}.inputs h2{font-size:26px;margin-bottom:2px}.segments{display:flex;gap:0;border:1px solid #b9c2d1;border-radius:6px;overflow:hidden;min-height:41px}.segments button{flex:1;background:var(--surface);border:0;border-right:1px solid #b9c2d1;color:var(--ink);padding:8px 10px;font-size:16px;line-height:1.25}.segments button:last-child{border:0}.segments button[aria-pressed=true]{background:var(--blue);color:#fff;font-weight:650}.segments button:focus-visible{outline-offset:-4px}.field{display:block;min-width:0}.field>span:first-child,.field-label{display:block;font-size:15px;font-weight:650;margin-bottom:6px}.input-unit{display:flex;align-items:stretch;min-height:43px;border:1px solid #b9c2d1;border-radius:6px;overflow:hidden;background:#fff}.input-unit:focus-within{outline:2px solid var(--blue);outline-offset:2px}.input-unit input{min-width:0;width:100%;border:0;padding:9px 12px;font-size:18px;color:var(--ink);background:transparent;border-radius:0;outline:none}.input-unit input:focus-visible{outline:none}.unit{padding:10px 12px;background:var(--surface);border-left:1px solid var(--line);font-size:13px;line-height:1.6;white-space:nowrap;display:flex;align-items:center;justify-content:center;min-width:74px;color:var(--ink)}select{width:100%;min-height:43px;border:1px solid #b9c2d1;border-radius:6px;color:var(--ink);background:#fff;padding:8px 34px 8px 12px;font-size:16px}.inputs .button{width:100%;margin-top:3px}.result{padding:25px 26px;min-width:0}.result h2{font-size:26px}.result-top{display:flex;justify-content:space-between;gap:20px;align-items:center;min-height:170px;padding-bottom:18px}.result-number{display:block;font-size:66px;font-weight:750;line-height:1.15;letter-spacing:-.055em;color:var(--blue);margin:15px 0 6px;overflow-wrap:anywhere}.result-number.compact{font-size:55px}.result .subtitle{font-size:17px;color:var(--muted)}.result-figure{width:220px;height:170px;color:var(--ink);flex-shrink:0}.result-figure text{font-family:system-ui,sans-serif;font-size:15px;fill:var(--ink)}.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-block:1px solid var(--line);padding:15px 0;margin:5px 0 18px}.metric{padding:0 18px;border-right:1px solid var(--line);min-width:0}.metric:first-child{padding-left:0}.metric:last-child{border:0;padding-right:0}.metric strong{display:block;font-size:23px;font-weight:740;line-height:1.2;letter-spacing:-.03em;overflow-wrap:anywhere}.metric span{display:block;font-size:14px;color:var(--muted);margin-top:5px}.result h3{font-size:21px;margin-bottom:12px}.table-scroll{overflow-x:auto}.result-table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;font-size:15px;text-align:left;line-height:1.4}.result-table thead th{background:var(--surface);font-weight:650}.result-table tbody th{background:#fff;font-weight:500}.result-table th,.result-table td{padding:9px 13px;border-bottom:1px solid var(--line)}.result-table tr:last-child td,.result-table tbody tr:last-child th{border:0}.result-table tr.selected td,.result-table tr.selected th{background:#e3eaff;font-weight:650}.result-table td:last-child,.result-table th:last-child{text-align:right}.result-note{font-size:13px;margin-top:12px}.result-actions{margin-top:18px;display:flex;gap:12px;align-items:center}.result-actions .copy-status{font-size:13px}.error{color:#a11f31;background:#fff3f3;border:1px solid #e7c4c8;padding:13px 15px;border-radius:6px;margin-top:14px;font-size:15px}.notice{padding:12px 15px;border:1px solid #dcce9c;background:#fffbed;color:#675218;border-radius:6px;font-size:14px;margin-top:15px}.result-empty{padding:38px 0;color:var(--muted)}.below-tool{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding-block:36px}.steps{list-style:none;padding:0;margin:24px 0 0;counter-reset:steps}.steps li{position:relative;padding:0 0 0 45px;margin:0 0 21px;counter-increment:steps}.steps li::before{content:counter(steps);position:absolute;left:0;top:1px;display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700}.steps h3{font-size:18px;letter-spacing:-.015em}.steps p{font-size:15px;margin-top:4px}.app-callout{border-radius:var(--radius);background:var(--ink);padding:30px;color:white;align-self:start}.app-callout h2{font-size:30px}.app-callout p{font-size:18px;color:#dfe6f7;margin:15px 0 22px}.app-callout small{display:block;font-size:12px;color:#c2cde4;margin-top:13px}.reading{max-width:900px;padding:24px 0 40px}.reading h2{margin:26px 0 14px}.reading p{margin-bottom:14px}.reading ul{color:var(--muted);padding-left:23px}.reading details{border-top:1px solid var(--line);padding:17px 0}.reading summary{cursor:pointer;font-size:18px;font-weight:650}.reading details p{margin:12px 0 0;font-size:16px}.formula{background:var(--surface);padding:17px 20px;border-left:3px solid var(--blue);color:var(--ink);font-size:17px;margin:15px 0}.related{border-top:1px solid var(--line);padding:28px 0 36px}.related h2{font-size:24px;margin-bottom:17px}.related-links{display:flex;gap:14px 28px;flex-wrap:wrap}.related-links a{font-size:16px}.site-footer{border-top:1px solid var(--line);padding-top:20px;padding-bottom:24px}.footer-row{display:flex;align-items:center;justify-content:space-between;gap:24px}.site-footer .wordmark{font-size:23px;gap:10px}.site-footer .wordmark svg{width:29px;height:29px}.footer-nav{display:flex;gap:28px}.footer-nav a{font-size:15px;color:var(--ink)}.site-footer>p{font-size:12px;margin-top:10px}.wire-entries{display:flex;flex-direction:column;gap:14px}.wire-row{display:grid;grid-template-columns:1fr 82px 32px;gap:8px;align-items:end}.wire-row select{font-size:15px;padding-left:9px;padding-right:22px}.wire-row .input-unit input{padding-inline:9px}.wire-row .remove-wire{min-height:43px;border:1px solid var(--line);background:white;border-radius:6px;display:flex;align-items:center;justify-content:center;color:var(--muted)}.wire-row .remove-wire:disabled{cursor:default;opacity:.3}.check{display:flex;align-items:flex-start;gap:10px;font-size:14px;font-weight:500}.check input{margin-top:5px;accent-color:var(--blue);width:17px;height:17px;flex-shrink:0}.field-hint{font-size:12px;margin-top:6px}.progress{height:13px;background:var(--surface);border-radius:7px;overflow:hidden;margin:14px 0 7px}.progress>span{display:block;height:100%;background:var(--blue)}.progress.fail>span{background:#a11f31}.pass-text{color:#14704a}.fail-text{color:#a11f31}.app-list{list-style:none;padding:0;margin:12px 0 40px}.app-list li{display:flex;justify-content:space-between;gap:32px;align-items:center;border-bottom:1px solid var(--line);padding:25px 0}.app-list h2{font-size:25px}.app-list p{margin-top:9px;font-size:17px}.app-list .button{white-space:nowrap}.small-hero{padding-bottom:22px}.narrow{max-width:900px}.privacy-list{padding-left:22px;color:var(--muted)}[hidden]{display:none!important}
@media(min-width:1550px){.wrap{max-width:1400px}.directory-hero{padding-top:60px}}
@media(max-width:1000px){.wrap{padding-inline:26px}.header-nav{gap:23px}.directory-hero h1{font-size:55px}.tool-group{grid-template-columns:150px 1fr}.tool-row{grid-template-columns:100px 1fr 26px;gap:20px}.tool-icon{width:96px}.tool-row h3{font-size:25px}.tool-row p{font-size:16px}.workbench{grid-template-columns:42% 58%}.inputs,.result{padding:22px}.result-figure{width:160px}.result-number{font-size:55px}.metric{padding-inline:12px}.metric strong{font-size:20px}.below-tool{gap:28px}.app-callout{padding:26px}.app-callout h2{font-size:27px}.wide-callout h2{font-size:30px}}
@media(max-width:760px){.wrap{padding-inline:20px}.site-header{height:72px;gap:18px}.wordmark{font-size:25px;gap:9px}.wordmark svg{width:30px;height:30px}.header-nav{gap:18px}.header-nav a{font-size:14px}.hero{padding:34px 0 26px}h1{font-size:37px;line-height:1.12}.hero p{font-size:18px}.directory-hero{padding:36px 0 24px}.directory-hero h1{font-size:47px}.directory-hero p{font-size:19px}.tool-group{display:block;padding-top:0}.tool-group>h2{font-size:22px;padding:12px 0}.tool-group+.tool-group{padding-top:7px}.tool-row{grid-template-columns:85px 1fr 25px;gap:18px;min-height:114px}.tool-icon{width:85px;height:72px}.tool-row h3{font-size:24px}.tool-row p{font-size:15px;line-height:1.4;margin-top:5px}.wide-callout>.wrap{align-items:flex-start;flex-direction:column;gap:22px}.wide-callout{padding-block:29px}.wide-callout h2{font-size:31px}.wide-callout p{font-size:17px}.workbench{grid-template-columns:1fr}.inputs{border-right:0;border-bottom:1px solid var(--line);gap:18px}.inputs,.result{padding:23px}.inputs h2,.result h2{font-size:25px}.input-unit input{font-size:18px}.result-top{min-height:157px;padding-bottom:14px}.result-number{font-size:62px}.result-number.compact{font-size:50px}.result-figure{width:180px;height:155px}.metric strong{font-size:22px}.metric span{font-size:13px}.below-tool{grid-template-columns:1fr;gap:15px;padding-block:30px}.below-tool h2{font-size:26px}.app-callout{margin-top:0}.app-callout h2{font-size:30px}.reading{padding-top:5px}.footer-row{align-items:flex-start;gap:20px}.footer-nav{gap:17px;padding-top:4px}.footer-nav a{font-size:13px}.app-list li{align-items:flex-start;flex-direction:column;gap:16px}.app-list p{font-size:16px}}
@media(max-width:400px){.wrap{padding-inline:16px}.wordmark{font-size:22px}.wordmark svg{width:27px}.header-nav{gap:12px}.header-nav a{font-size:12px}.directory-hero h1{font-size:40px}.tool-row{grid-template-columns:65px 1fr 22px;gap:12px}.tool-icon{width:65px;height:62px}.tool-row h3{font-size:21px}.tool-row p{font-size:14px}.inputs,.result{padding:20px}.result-figure{width:92px}.result-number{font-size:48px;white-space:nowrap}.result-number.compact{font-size:38px;white-space:normal}.metric{padding-inline:9px}.metric strong{font-size:18px}.result-table th,.result-table td{padding:8px}.result-table{font-size:13px}.footer-row{flex-direction:column;gap:10px}.wide-callout h2{font-size:28px}.app-callout{padding:23px}.app-callout h2{font-size:27px}.button.light{white-space:normal}.wire-row{grid-template-columns:1fr 70px 30px}.wire-row select{font-size:14px}.segments button{font-size:15px}}
@media(prefers-reduced-motion:no-preference){a,button{transition:color .15s,background .15s}html{scroll-behavior:smooth}}

.header-nav .app-nav{color:var(--blue);font-weight:700}
@media(max-width:760px){.below-tool .app-callout{order:-1}}

@media(max-width:760px){.tool-header .header-nav>a:not(.app-nav){display:none}.tool-header .app-nav{font-size:15px}}

@media(max-width:760px){.vertical-site .header-nav .home-nav{display:none}.vertical-site .directory-hero h1{font-size:42px}}
@media(max-width:400px){.vertical-site .wordmark{font-size:20px}.vertical-site .directory-hero h1{font-size:36px}}

.app-callout .app-eyebrow{font-size:13px;font-weight:650;color:#dfe6f7;margin:0 0 10px;letter-spacing:0}
.app-benefits{margin:14px 0 20px;padding-left:20px;font-size:16px;color:#fff}
.app-benefits li+li{margin-top:5px}
.reading .author-note,.reading .source-note{font-size:14px;line-height:1.6}
.worked-example{margin-top:30px;padding-top:5px}
.example-link{display:inline-flex;align-items:center;gap:10px;font-size:16px;margin-bottom:18px}
.example-link .arrow{width:21px;height:21px}

.text-button{border:0;padding:0;background:none;color:var(--ink);font-size:15px;cursor:pointer;text-align:left}
.text-button:hover{text-decoration:underline}
.analytics-consent{position:fixed;bottom:12px;left:12px;right:12px;max-width:1000px;margin:auto;z-index:20;display:flex;align-items:center;gap:20px;padding:16px 20px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 3px 20px #0b173626}
.analytics-consent p{font-size:14px;line-height:1.5;flex:1}
.analytics-consent>div{display:flex;gap:10px}
.analytics-consent .button{font-size:14px;white-space:nowrap;min-height:44px;padding:10px 15px}
@media(max-width:760px){.analytics-consent{flex-direction:column;align-items:stretch;gap:12px;padding:14px}.analytics-consent>div{justify-content:flex-end}.footer-nav{flex-wrap:wrap}.text-button{font-size:13px}}