:root{--ink:#20352e;--muted:#59675f;--green:#255a43;--lime:#d9e8a9;--cream:#f6f5ee;--line:#d9ded3;--white:#fffefa;--serif:Georgia,'Times New Roman',serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--cream);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-underline-offset:5px}a:hover{color:#377452}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #b16e28;outline-offset:4px}h1,h2,h3,p{margin:0 0 18px}h1,h2,h3{line-height:1.13}h1{font-size:clamp(40px,4.3vw,65px);font-weight:500;letter-spacing:-2.8px}h2{font-size:clamp(30px,3vw,42px);font-weight:500;letter-spacing:-1.4px}h3{font-size:24px;letter-spacing:-.5px}h1 em{font-family:var(--serif);font-weight:400;color:var(--green)}p{color:var(--muted)}small{font-size:12px}strong{font-weight:700}.wrap{max-width:1250px;margin:0 auto;padding-left:40px;padding-right:40px}.header{min-height:96px;max-width:1440px;margin:auto;padding:20px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-size:20px;font-weight:700;letter-spacing:-.7px;white-space:nowrap}.brand small{display:block;font-size:9px;letter-spacing:1.8px;font-weight:500;margin-top:3px}.mark{display:grid;place-items:center;position:relative;background:var(--green);color:var(--cream);width:38px;height:41px;font-family:var(--serif);font-size:30px;font-weight:400;border-radius:3px}.mark span{position:absolute;right:1px;top:0;font:15px Arial}.header nav{display:flex;align-items:center;gap:27px;font-size:13px}.header nav a{text-decoration:none;border-bottom:1px solid transparent}.header nav a:hover,.header nav a:focus-visible{border-bottom-color:currentColor}.nav-cta{border:1px solid var(--line)!important;padding:10px 14px;border-radius:4px}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:700;color:var(--green);text-transform:uppercase;margin-bottom:19px;display:block}.eyebrow span:not(.dot){font-weight:400;letter-spacing:.4px}.dot{display:inline-block;width:7px;height:7px;background:#608652;border-radius:50%;margin-right:8px}.hero{padding-top:64px;padding-bottom:70px;display:grid;grid-template-columns:1.4fr 1fr;gap:65px;align-items:center}.hero .lead{max-width:570px;font-size:17px;line-height:1.7;margin-top:24px}.lead{font-size:19px;max-width:760px;line-height:1.65}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:20px;margin:26px 0}.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;background:var(--green);color:#fff!important;border:1px solid var(--green);border-radius:4px;padding:13px 19px;font-size:13px;font-weight:600;text-decoration:none;line-height:1.5}.button:hover{background:#153f2d}.plain{background:none;border:0;padding:7px 0;text-decoration:none;color:var(--ink);font-size:13px}.plain:hover{text-decoration:underline}.hero-note{font-size:11px;margin-top:25px}.hero-study{background:#e8eddb;padding:26px 30px 0;border:1px solid #d8e1c5;border-radius:6px;overflow:hidden}.study-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.study-top .eyebrow{font-size:9px;margin:0;letter-spacing:1.3px}.tag{font-size:10px;background:#f8faef;border:1px solid #d4ddc5;border-radius:30px;padding:3px 9px;white-space:nowrap;color:var(--green)}.study-question{font-family:var(--serif);font-size:28px;color:var(--ink);line-height:1.15;margin:22px 0 16px}.energy-bars{height:70px;display:flex;align-items:flex-end;gap:6px;border-bottom:1px solid #c5d1b4;padding:0 3px}.energy-bars span{display:block;flex:1;background:#84a477;border-radius:3px 3px 0 0;height:32%}.energy-bars span:nth-child(2),.energy-bars span:nth-child(11){height:45%}.energy-bars span:nth-child(3),.energy-bars span:nth-child(10){height:56%}.energy-bars span:nth-child(4),.energy-bars span:nth-child(9){height:74%}.energy-bars span:nth-child(5),.energy-bars span:nth-child(8){height:88%}.energy-bars span:nth-child(6),.energy-bars span:nth-child(7){height:100%;background:var(--green)}.study-result{display:flex;align-items:center;justify-content:space-between;margin:18px 0 9px}.study-result strong{font-size:48px;line-height:1.2;font-weight:500;letter-spacing:-2px}.study-result strong small{font-size:18px;letter-spacing:-.5px}.study-result>span{font-size:11px;line-height:1.6;color:var(--muted)}.hero-study>p:not(.study-question){font-size:11px;margin-bottom:18px}.hero-study>a{display:flex;justify-content:space-between;border-top:1px solid #c5d1b4;margin:0 -30px;padding:14px 30px;font-size:12px;font-weight:600;text-decoration:none}.tool-section{background:#eeefe7;border-block:1px solid var(--line);padding:45px 0 50px;scroll-margin-top:20px}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:27px}.section-head h2{margin:0}.section-head p{font-size:13px;margin-bottom:0}.section-head .eyebrow{margin-bottom:10px}.tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);border-radius:5px;background:var(--white);overflow:hidden}.tool-card{padding:24px;display:flex;flex-direction:column;align-items:flex-start}.tool-card+.tool-card{border-left:1px solid var(--line)}.tool-icon{font:30px var(--serif);display:block;line-height:1.4;margin-bottom:15px;color:var(--green)}.tool-card .eyebrow{font-size:9px;letter-spacing:1.3px;margin-bottom:12px}.tool-card h3{font-size:23px;font-weight:500;margin-bottom:14px}.tool-card p{font-size:13px;line-height:1.65;flex:1}.text-link{font-size:12px;font-weight:700;text-decoration:none}.small-link{font-size:11px;color:var(--muted);margin-top:12px;text-decoration:none}.text-link:hover,.small-link:hover{text-decoration:underline}.section{padding-top:66px;padding-bottom:66px}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 32px}.guide-card{border-top:1px solid var(--line);padding:25px 0 30px;text-decoration:none;display:flex;flex-direction:column;align-items:flex-start}.guide-card .eyebrow{font-size:9px;margin-bottom:16px}.guide-card h3{font-family:var(--serif);font-size:26px;line-height:1.2;font-weight:400;margin-bottom:13px;max-width:310px}.guide-card p{font-size:13px;flex:1;margin-bottom:20px}.guide-card:hover h3{text-decoration:underline;text-decoration-thickness:1px}.notebook-promo{background:var(--green);color:#fff;border-radius:5px;display:grid;grid-template-columns:1.2fr 1fr;gap:85px;padding:45px;max-width:1170px}.notebook-promo .eyebrow{color:var(--lime)}.notebook-promo p{color:#e0e7df;font-size:14px;max-width:470px}.notebook-promo .button{background:var(--lime);color:var(--ink)!important}.comparison-preview{align-self:center;background:#f5f5eb;color:var(--ink);border-radius:5px;padding:23px 26px;transform:rotate(-1deg)}.comparison-preview>div{display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding:15px 0;font-size:13px}.comparison-preview>div:first-child{display:block;padding-top:0}.comparison-preview small{display:block;font-size:10px;color:var(--muted);margin-top:3px}.comparison-preview strong{font-weight:500;font-size:18px}.comparison-preview p{font-size:10px;color:var(--muted);margin-top:14px;margin-bottom:0}.maintenance{display:grid;grid-template-columns:1.35fr 1fr;gap:95px}.maintenance h2{font-size:33px;max-width:430px}.maintenance p{font-size:14px}.maintenance a{font-size:12px}.update-note{border-left:1px solid var(--line);padding-left:36px;align-self:center}.update-note time{font-size:10px;letter-spacing:1px;color:var(--muted)}.update-note h3{font-size:23px;line-height:1.3;font-family:var(--serif);font-weight:400;margin-top:12px}.footer{border-top:1px solid var(--line);padding:40px max(40px,calc((100vw - 1170px)/2));display:grid;grid-template-columns:1fr 1fr;gap:20px;background:#eeefe7}.footer .brand{font-size:18px}.footer p{font-size:13px;margin-top:12px;margin-bottom:8px}.footer small{color:var(--muted);font-size:10px}.footer nav{display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;align-content:start;justify-self:end}.footer nav a{font-size:12px;text-decoration:none}.footer nav a:hover{text-decoration:underline}.footer .footer-note{grid-column:1/-1;font-size:10px;border-top:1px solid var(--line);padding-top:16px;margin-top:16px}.narrow{max-width:900px}.page-heading{padding-top:60px;padding-bottom:70px}.page-heading h1{margin-bottom:25px}.page-heading h2{font-size:29px;margin-top:40px}.page-heading li{margin-bottom:10px;color:var(--muted)}.page-heading .guide-grid{margin-top:30px}.filters{display:flex;flex-wrap:wrap;gap:8px;margin:30px 0 25px}.filters button{font-size:12px;padding:8px 15px;border:1px solid var(--line);border-radius:30px;background:transparent;color:var(--ink)}.filters button.active{background:var(--green);color:white;border-color:var(--green)}.article-heading{padding-top:35px;padding-bottom:38px;border-bottom:1px solid var(--line)}.breadcrumb{font-size:11px;text-decoration:none;display:inline-block;margin-bottom:32px;color:var(--muted)}.article-heading h1{max-width:890px;line-height:1.05}.article-heading .lead{max-width:780px;font-size:18px}.byline{font-size:11px;color:var(--muted)}.article-layout{display:grid;grid-template-columns:225px minmax(0,1fr);gap:80px;padding-top:42px;padding-bottom:65px}.toc{align-self:start;position:sticky;top:25px}.toc>a:not(.button){display:block;font-size:12px;color:var(--muted);text-decoration:none;padding:9px 0;border-bottom:1px solid var(--line)}.toc>a:not(.button):hover{color:var(--green);text-decoration:underline}.toc .button{margin-top:25px;font-size:12px}.toc .plain{display:block;margin-top:10px}.article{max-width:760px;min-width:0}.article section{margin:40px 0}.article h2{font-size:30px;line-height:1.22;letter-spacing:-.7px}.article p,.article li{font-size:16px;line-height:1.85}.article li{color:var(--muted);margin-bottom:10px}.article strong{color:var(--ink)}.callout{background:#e9eeda;border-left:3px solid #789655;padding:18px 23px;border-radius:2px}.callout p{font-size:13px;line-height:1.7;margin:5px 0 0}.callout strong{font-size:13px}.equation{font:14px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;padding:20px;background:#e8ede3;border:1px solid #d5decf;margin:22px 0;overflow-wrap:anywhere;border-radius:4px}.table-wrap{overflow:auto;margin:24px 0;border:1px solid var(--line);border-radius:4px}table{border-collapse:collapse;width:100%;font-size:13px;background:var(--white)}th{text-align:left;background:#e9ede2;font-size:11px;font-weight:600}td,th{padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top}tr:last-child td{border:0}td{color:var(--muted)}.next-step{border-top:1px solid var(--line);padding-top:28px;margin-top:40px}.next-step a:not(.button){display:block;font-size:12px;margin-top:20px}.article #sources li{font-size:13px}.article #sources p{font-size:12px}.release{padding:25px;background:#e9ede2;margin:30px 0}.release time{font-size:12px;color:var(--green)}.release h2{margin-top:16px}.notebook-heading{padding-top:40px;padding-bottom:60px}.notebook-heading h1{font-size:46px;letter-spacing:-1.6px}.notebook-heading .lead{font-size:16px}.notebook-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:25px;align-items:start}.input-panel{background:var(--white);padding:28px;border:1px solid var(--line);border-radius:5px}.panel-title{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px}.panel-title h2{font-size:23px;letter-spacing:-.5px;margin:0}.input-panel .tag{font-size:9px}#fields{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px}label{display:block;font-size:12px;font-weight:600;line-height:1.5;margin-bottom:16px}#fields label{margin:0}input,textarea,select{width:100%;border:1px solid #bdc8bd;border-radius:3px;background:#fff;color:var(--ink);padding:10px 12px;font-size:15px;margin-top:7px;min-width:0}input:invalid:not(:placeholder-shown){border-color:#a76532}textarea{resize:vertical}.input-panel>label{margin-top:22px}.input-panel .actions{margin-bottom:0;gap:15px}.input-panel [role=status]{font-size:12px;margin:10px 0 0}.result-panel{background:#e6ecd9;border:1px solid #cfdbc0;padding:30px;border-radius:5px;position:sticky;top:25px}.result-number{font-size:54px;letter-spacing:-2px;font-weight:500;line-height:1.2}.result-number small{font-size:20px;letter-spacing:0}.result-label{font-size:13px;margin-top:6px}.result-details{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:24px 0}.result-details>div{border-top:1px solid #c5d2b9;padding-top:10px}.result-details strong{font-size:21px;display:block;font-weight:500}.result-details span{font-size:11px;color:var(--muted)}.result-panel .equation{background:rgba(255,255,255,.35);font-size:11px;margin-bottom:14px}.result-panel #boundary{font-size:12px;line-height:1.7}.result-panel>a{font-size:12px}.status-ok,.status-warn{font-size:12px;padding:9px 12px;border-radius:3px;margin-top:16px}.status-ok{background:#d4e3c6;color:#244726}.status-warn{background:#f2dfbd;color:#6f4419}.saved-section{margin-top:50px}.saved-section h2{font-size:30px}.saved-section>p{font-size:12px}#saved-count{font-size:14px;background:#e3e8d7;padding:5px 9px;border-radius:20px;vertical-align:middle}#saved-scenarios{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.saved-card{padding:23px;background:var(--white);border:1px solid var(--line);border-radius:4px;overflow-wrap:anywhere}.saved-card h3{font-size:19px;margin-bottom:10px}.saved-card .saved-value{font-size:30px;line-height:1.2;color:var(--ink)}.saved-card p{font-size:11px}.saved-card dl{font-size:11px}.saved-card dl>div{display:flex;gap:15px;justify-content:space-between;border-bottom:1px solid var(--line);padding:6px 0}.saved-card dd{margin:0;text-align:right}.saved-card button{border:0;background:none;padding:5px 0;margin-right:20px;color:var(--green);font-size:12px;text-decoration:underline}.empty-state{padding:28px;border:1px dashed #aebca8;border-radius:4px;grid-column:1/-1;color:var(--muted);font-size:14px}.skip{position:absolute;left:20px;top:-100px;background:white;padding:10px;z-index:100}.skip:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}.legal-kicker{font-size:11px;letter-spacing:1px;color:var(--green)}.legal-intro{font-size:18px}.legal-section h2{margin-top:35px}
@media(min-width:1450px){.hero{padding-top:80px;padding-bottom:85px}}@media(max-width:1100px){.header{padding:20px 25px}.header nav{gap:17px;font-size:12px}.brand{font-size:17px}.wrap{padding-left:30px;padding-right:30px}.hero{gap:30px}.hero h1{font-size:49px}.hero-study{padding:24px 23px 0}.hero-study>a{margin-inline:-23px;padding-inline:23px}.study-result{gap:15px}.study-result strong{font-size:40px}.tool-card{padding:22px 18px}.tool-card h3{font-size:21px}.notebook-promo{margin:0 30px;gap:40px}.article-layout{gap:40px;grid-template-columns:190px minmax(0,1fr)}.maintenance{gap:50px}.notebook-grid{gap:20px}.input-panel{padding:22px}.result-panel{padding:24px}.panel-title{flex-wrap:wrap}}
@media(max-width:800px){.header{flex-wrap:wrap;justify-content:center;gap:16px}.header nav{width:100%;justify-content:center;gap:22px}.hero{grid-template-columns:1fr;padding-top:42px;gap:30px}.hero h1{font-size:54px}.hero .lead{max-width:650px}.hero-study{max-width:520px;width:100%}.tool-grid{grid-template-columns:1fr 1fr}.tool-card:nth-child(3){border-left:0;border-top:1px solid var(--line)}.tool-card:nth-child(4){border-top:1px solid var(--line)}.guide-grid{grid-template-columns:1fr 1fr}.notebook-promo{grid-template-columns:1fr;gap:30px;padding:32px}.comparison-preview{max-width:520px;width:100%;transform:none}.maintenance{grid-template-columns:1fr;gap:25px}.update-note{padding-left:0;border-left:0;border-top:1px solid var(--line);padding-top:25px}.article-layout{grid-template-columns:1fr;gap:30px}.toc{position:static}.toc>a:not(.button){padding:6px 0}.toc .button{margin-top:17px}.toc .plain{display:inline-block;margin-left:20px}.article-heading h1{font-size:46px}.article{max-width:none}.article-layout{padding-top:30px}.notebook-grid{grid-template-columns:1fr}.result-panel{position:static}.result-number{font-size:48px}#saved-scenarios{grid-template-columns:1fr 1fr}.footer{padding:35px 30px}}
@media(max-width:500px){.wrap{padding-left:22px;padding-right:22px}.header{padding:19px 15px;gap:14px}.header nav{gap:14px;font-size:11px;flex-wrap:wrap}.nav-cta{padding:7px 10px}.brand{font-size:19px}.hero{padding-top:32px;padding-bottom:35px}.hero h1{font-size:42px;letter-spacing:-1.7px}.hero .lead{font-size:15px;margin-top:18px}.eyebrow{font-size:9px}.hero .actions{gap:10px;margin-top:22px}.hero .plain{font-size:12px}.hero-note{font-size:10px}.hero-study{padding:22px 23px 0}.study-top .eyebrow{font-size:8px;letter-spacing:.6px}.study-question{font-size:27px}.study-result strong{font-size:42px}.section-head{display:block}.section-head>p,.section-head>.plain,.section-head>button{margin-top:15px;display:inline-block}.section-head h2{font-size:31px}.tool-grid{grid-template-columns:1fr}.tool-card{padding:25px}.tool-card+.tool-card{border-left:0;border-top:1px solid var(--line)}.tool-card h3{font-size:26px}.tool-card p{max-width:300px}.tool-icon{float:left;font-size:32px;margin-bottom:10px}.tool-section{padding:32px 0}.section{padding-top:42px;padding-bottom:42px}.guide-grid{grid-template-columns:1fr;gap:0}.guide-card h3{max-width:100%;font-size:28px}.guide-card{padding:24px 0}.notebook-promo{margin:0 15px;padding:27px 23px}.notebook-promo h2{font-size:32px}.comparison-preview{padding:20px}.comparison-preview>div{font-size:11px}.comparison-preview strong{font-size:16px}.footer{grid-template-columns:1fr;padding:30px 22px}.footer nav{justify-self:start;margin-top:10px;gap:12px 30px}.footer .footer-note{grid-column:auto}.page-heading{padding-top:35px;padding-bottom:40px}.page-heading h1{font-size:40px;letter-spacing:-1.6px}.lead{font-size:17px}.article-heading h1{font-size:39px;letter-spacing:-1.5px}.article-heading{padding-top:23px}.article-heading .lead{font-size:16px}.article h2{font-size:27px}.article p,.article li{font-size:15px}.article td,.article th{padding:11px;font-size:11px}.byline{font-size:10px}.callout{padding:16px}.toc .button{font-size:11px}.notebook-heading h1{font-size:38px}.notebook-heading .lead{font-size:15px}.input-panel{padding:20px}.panel-title h2{font-size:22px}#fields{gap:14px}#fields label{font-size:11px}#fields input{padding:10px;font-size:15px}.notebook-heading .filters{gap:6px}.filters button{font-size:11px;padding:8px 12px}#saved-scenarios{grid-template-columns:1fr}.result-panel{padding:23px}.article li{padding-left:0}.article ul,.article ol{padding-left:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{body{background:white;color:#111;font-size:11pt}.header,.footer,.toc,.filters,.skip,.next-step,.actions,.saved-card button,.hero-study,.notebook-promo{display:none!important}.wrap{padding:0;max-width:none}.article-layout{display:block}.article-heading{padding:0}.article-heading h1{font-size:30pt}.article section{break-inside:avoid}.article-layout{padding-top:12px}a{color:#111}.notebook-grid{display:block}.result-panel{position:static}.page-heading{padding:0}.table-wrap{overflow:visible}table{font-size:10pt}.byline{font-size:9pt}.input-panel{break-inside:avoid}.saved-card{break-inside:avoid}@page{margin:18mm}}