:root{--ink:#1c2928;--ink-soft:#34413e;--muted:#62716c;--accent:#11664f;--accent-dark:#09513d;--line:#d9dfd9;--paper:#f8f8f5;--surface:#f1f3ee;--mint-pale:#edf3ed;--max:1190px;color-scheme:light;text-rendering:optimizelegibility;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;color:var(--ink);-webkit-font-smoothing:antialiased;background:#fff;margin:0;line-height:1.6}::selection{color:var(--ink);background:#d7e9df}[hidden]{display:none!important}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button,input,select{font:inherit}button{cursor:pointer}img,svg{max-width:100%}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.container{width:min(calc(100% - 52px),var(--max));margin-inline:auto}.skip-link{background:var(--ink);color:#fff;z-index:100;padding:12px 17px;position:absolute;top:-100px;left:15px}.skip-link:focus{top:12px}.eyebrow{letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-size:.74rem;font-weight:800;line-height:1.35}.story-separator{background:var(--line);vertical-align:middle;width:20px;height:1px;display:inline-block}.site-header{background:#fff}.masthead-strip{border-bottom:1px solid var(--line);background:var(--paper)}.masthead-strip-inner{color:#5a6661;text-transform:uppercase;letter-spacing:.105em;justify-content:space-between;align-items:center;gap:20px;padding-block:10px;font-size:.66rem;font-weight:700;display:flex}.header-inner{justify-content:space-between;align-items:center;gap:24px;min-height:103px;display:flex}.wordmark{letter-spacing:-.07em;white-space:nowrap;color:var(--ink);align-items:baseline;font-size:clamp(1.85rem,2.8vw,2.3rem);font-weight:850;line-height:1;display:inline-flex}.wordmark:hover{color:var(--ink)}.wordmark-ai{color:var(--accent)}.wordmark-period{color:var(--accent);font-size:1.25em}.header-tagline{border-left:1px solid var(--line);color:var(--muted);margin:0 auto 0 0;padding-left:20px;font-size:.85rem;line-height:1.45}.header-search{color:var(--ink);white-space:nowrap;border-bottom:1px solid var(--ink);align-items:center;gap:10px;padding-bottom:5px;font-size:.85rem;font-weight:700;display:inline-flex}.nav-rule{border-block:1px solid var(--ink)}.nav-inner{justify-content:space-between;align-items:center;gap:25px;min-height:48px;display:flex}.primary-nav{align-items:center;gap:30px;display:flex}.primary-nav a{white-space:nowrap;font-size:.81rem;font-weight:750;line-height:1.35;transition:color .16s}.nav-side{text-transform:uppercase;letter-spacing:.12em;color:var(--muted);white-space:nowrap;font-size:.68rem}.mobile-menu{display:none;position:relative}.mobile-menu summary{cursor:pointer;align-items:center;gap:14px;font-size:.86rem;font-weight:800;list-style:none;display:flex}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-links{border:1px solid var(--line);z-index:30;background:#fff;width:min(310px,100vw - 36px);padding:10px;display:grid;position:absolute;top:calc(100% + 11px);left:0;box-shadow:0 12px 26px #23372e19}.mobile-links a{border-bottom:1px solid var(--line);padding:10px 12px;font-size:.9rem}.mobile-links a:last-child{border-bottom:0}.edition-line{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;padding:27px 0 21px;display:flex}.edition-line>span:last-child{color:var(--muted);font-size:.76rem}.lead-grid{grid-template-columns:minmax(0,1.55fr) minmax(290px,.7fr);gap:55px;padding:38px 0 62px;display:grid}.lead-story{min-width:0}.story-meta{align-items:center;gap:13px;display:flex}.story-meta a{color:var(--muted);font-size:.78rem;font-weight:700}.lead-story h1{letter-spacing:-.055em;max-width:790px;margin:21px 0 22px;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.8rem,4.9vw,5.05rem);font-weight:600;line-height:1.08}.lead-story h1 em,.tools-intro h2 em{color:var(--accent);font-style:italic;font-weight:400}.lead-story h1 a:hover{color:var(--ink)}.lead-deck{color:#485750;max-width:625px;margin:0;font-size:1.09rem;line-height:1.72}.lead-actions{flex-wrap:wrap;align-items:center;gap:20px;margin:25px 0 33px;display:flex}.lead-actions>span{color:var(--muted);font-size:.76rem}.editorial-link{border-bottom:1px solid var(--accent);color:var(--accent);align-items:center;gap:18px;padding-bottom:5px;font-size:.82rem;font-weight:850;display:inline-flex}.editorial-link span{font-size:1.17rem;line-height:1}.chart-feature{border:1px solid var(--line);background:var(--paper);margin:0;padding:24px 25px 19px}.chart-heading{justify-content:space-between;align-items:center;gap:15px;display:flex}.chart-heading h2{letter-spacing:-.03em;margin:7px 0 0;font-family:Georgia,Times New Roman,serif;font-size:1.48rem;font-weight:600}.chart-unit{letter-spacing:.1em;color:var(--muted);font-size:.72rem;font-weight:700}.chart-feature svg{width:100%;height:auto;margin-top:12px;display:block;overflow:visible}.gridlines line{stroke:#cbd6ce;stroke-width:1px;stroke-dasharray:3 5}.chart-labels text{fill:#6b7971;font-family:Arial,sans-serif;font-size:12px}.chart-growth{stroke:var(--accent);stroke-width:3.1px;fill:none;stroke-linecap:round;stroke-linejoin:round}.chart-contributions{stroke:#8d9a91;stroke-width:2px;fill:none;stroke-dasharray:6 5}.chart-feature figcaption{border-top:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:10px 22px;padding-top:13px;display:flex}.chart-feature figcaption small{color:var(--muted);flex-basis:100%;font-size:.73rem}.chart-legend{color:#53625a;align-items:center;gap:8px;font-size:.73rem;display:inline-flex}.legend-green,.legend-gray{background:var(--accent);width:17px;height:3px;display:inline-block}.legend-gray{background:#8d9a91}.front-page-aside{border-left:1px solid var(--line);min-width:0;padding-left:32px}.aside-title{border-bottom:2px solid var(--ink);justify-content:space-between;align-items:center;gap:10px;padding:0 0 16px;display:flex}.aside-title>span:last-child{color:var(--muted);font-size:.73rem}.aside-story{border-bottom:1px solid var(--line);grid-template-columns:25px 1fr;gap:15px;padding:23px 0;display:grid}.aside-number{color:#8c9690;font-family:Georgia,serif;font-size:1.13rem}.aside-story .meta{color:var(--accent);letter-spacing:.07em;gap:13px;font-size:.66rem;font-weight:800;display:flex}.aside-story h2{letter-spacing:-.025em;margin:10px 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(1.2rem,1.6vw,1.48rem);font-weight:600;line-height:1.23}.aside-story p{color:var(--muted);margin:0;font-size:.81rem;line-height:1.65}.aside-bottom{color:var(--accent);justify-content:space-between;align-items:center;gap:15px;padding:23px 0;font-size:.82rem;font-weight:800;display:flex}.section-directory{background:var(--paper);border-block:1px solid var(--line)}.directory-inner{align-items:center;gap:45px;min-height:81px;display:flex}.directory-label{color:var(--muted);text-transform:uppercase;letter-spacing:.13em;flex:none;font-size:.69rem;font-weight:800}.directory-inner nav{flex-wrap:wrap;align-items:center;gap:15px 34px;display:flex}.directory-inner nav a{font-size:.84rem;font-weight:750}.section{padding:72px 0}.section.alt{background:var(--paper);border-block:1px solid var(--line)}.section-head{justify-content:space-between;align-items:end;gap:24px;margin-bottom:32px;display:flex}.section-head h2,.standards-layout h2{letter-spacing:-.045em;margin:10px 0 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.15rem,3.7vw,3.25rem);font-weight:500;line-height:1.13}.section-head p{max-width:370px;color:var(--muted);margin:0;font-size:.9rem}.card-grid{border-top:2px solid var(--ink);grid-template-columns:repeat(3,minmax(0,1fr));gap:0 32px;display:grid}.article-card{border-bottom:1px solid var(--line);background:0 0;flex-direction:column;min-width:0;display:flex}.card-copy{flex-direction:column;flex:1;padding:26px 0 28px;display:flex}.meta{color:var(--muted);text-transform:uppercase;letter-spacing:.075em;align-items:center;gap:10px;font-size:.71rem;font-weight:750;display:flex}.meta a{color:var(--accent)}.article-card h3{letter-spacing:-.025em;margin:14px 0 12px;font-family:Georgia,Times New Roman,serif;font-size:clamp(1.33rem,2vw,1.65rem);font-weight:600;line-height:1.28}.article-card p{color:var(--muted);margin:0 0 20px;font-size:.87rem;line-height:1.73}.article-card .text-link{margin-top:auto}.text-link{color:var(--accent);font-size:.82rem;font-weight:800}.section-link{text-align:right;padding-top:24px}.tools-section{background:var(--paper);border-block:1px solid var(--line);padding:70px 0 80px}.tools-section-layout{grid-template-columns:minmax(240px,.84fr) minmax(0,1.16fr);align-items:start;gap:80px;display:grid}.tools-intro h2{letter-spacing:-.05em;margin:16px 0 20px;font-family:Georgia,serif;font-size:clamp(2.5rem,4.3vw,4rem);font-weight:500;line-height:1.12}.tools-intro p{color:var(--muted);max-width:390px;margin-bottom:28px;font-size:.95rem}.tools-table{border-top:2px solid var(--ink)}.tools-table-row{border-bottom:1px solid var(--line);grid-template-columns:35px 1fr 20px;align-items:start;gap:14px;padding:23px 0;display:grid}.tool-index{color:var(--muted);padding-top:1px;font-family:Georgia,serif;font-size:1rem}.tools-table-row strong{letter-spacing:-.015em;font-size:1rem;font-weight:760;display:block}.tools-table-row small{color:var(--muted);margin-top:5px;font-size:.82rem;line-height:1.55;display:block}.table-arrow{color:var(--accent);font-size:1.25rem;line-height:1}.standards-layout{grid-template-columns:1.05fr 1fr;align-items:start;gap:90px;display:grid}.standards-layout h2{max-width:530px}.standards-copy{border-top:2px solid var(--ink);padding-top:25px}.standards-copy p{color:#485a52;margin:0 0 25px;line-height:1.85}.standards-links{gap:0;display:grid}.standards-links a{color:var(--accent);border-top:1px solid var(--line);padding:13px 0;font-size:.88rem;font-weight:750}.breadcrumb{color:var(--muted);flex-wrap:wrap;gap:6px;padding-top:25px;font-size:.76rem;display:flex}.breadcrumb a{color:var(--accent);text-underline-offset:3px;text-decoration:underline #a9c4b7}.page-intro{border-bottom:1px solid var(--line);margin-bottom:28px;padding:49px 0 38px}.page-intro h1{letter-spacing:-.05em;max-width:920px;margin:14px 0 17px;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.8rem,5.5vw,4.8rem);font-weight:500;line-height:1.13}.page-intro p{color:var(--muted);max-width:760px;margin:0;font-size:1.04rem;line-height:1.75}.pill{color:var(--accent);text-transform:uppercase;letter-spacing:.11em;font-size:.72rem;font-weight:850}.reading-layout{grid-template-columns:minmax(0,755px) minmax(210px,1fr);align-items:start;gap:69px;padding-bottom:82px;display:grid}.article-hero h1{letter-spacing:-.045em;margin:19px 0;font-family:Georgia,serif;font-size:clamp(2.8rem,4.65vw,4.65rem);font-weight:500;line-height:1.14}.article-hero .deck{color:#58665e;max-width:720px;margin:0;font-size:1.15rem;line-height:1.7}.byline{border-bottom:1px solid var(--line);color:var(--muted);padding:20px 0 22px;font-size:.8rem}.byline a{color:var(--ink);text-underline-offset:2px;font-weight:700;text-decoration:underline}.article-prose{color:#30413a;font-size:1.05rem;line-height:1.9}.article-prose h2{letter-spacing:-.03em;color:var(--ink);margin:47px 0 19px;font-family:Georgia,serif;font-size:clamp(1.55rem,2.4vw,2.1rem);font-weight:500;line-height:1.27}.article-prose p{margin:0 0 20px}.article-prose ul{margin:0 0 24px;padding-left:23px}.article-prose li{margin:0 0 9px}.article-prose a{color:var(--accent);text-underline-offset:3px;text-decoration:underline}.key-points{background:var(--paper);border-left:3px solid var(--accent);margin:29px 0 36px;padding:25px 29px}.key-points h2{letter-spacing:.11em;text-transform:uppercase;margin:0 0 13px;font-family:Arial,sans-serif;font-size:.81rem;font-weight:850}.key-points ul{margin:0;padding-left:19px;font-size:.94rem;line-height:1.65}.key-points li{margin-bottom:10px}.key-points li:last-child{margin-bottom:0}.sidebar{border-top:2px solid var(--ink);padding-top:21px;position:sticky;top:25px}.sidebar h2{margin:0 0 12px;font-family:Georgia,serif;font-size:1.4rem;font-weight:500}.sidebar p{color:var(--muted);margin:0 0 20px;font-size:.84rem;line-height:1.6}.sidebar a{color:var(--accent);border-bottom:1px solid var(--line);padding:12px 0;font-size:.85rem;font-weight:700;line-height:1.55;display:block}.source-list{padding-left:24px;font-size:.9rem;line-height:1.8}.source-list a{overflow-wrap:anywhere}.disclaimer-note{color:#50645b;background:var(--paper);border:1px solid var(--line);margin-top:26px;padding:18px 22px;font-size:.85rem;line-height:1.65}.legal{max-width:800px;padding:8px 0 76px;line-height:1.8}.legal h2{letter-spacing:-.02em;margin:35px 0 13px;font-family:Georgia,serif;font-size:1.6rem;font-weight:500;line-height:1.3}.legal p,.legal li{color:#40554a}.legal a{color:var(--accent);text-underline-offset:3px;text-decoration:underline}.legal ul{padding-left:23px}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.tool-card{border:1px solid var(--line);background:#fff;flex-direction:column;min-height:190px;padding:26px;transition:border-color .15s;display:flex}.tool-card:hover{border-color:var(--accent)}.tool-symbol{color:var(--accent);font-size:1.55rem;font-weight:400;line-height:1}.tool-card h3{letter-spacing:-.02em;margin:15px 0 7px;font-family:Georgia,serif;font-size:1.5rem;font-weight:500;line-height:1.3}.tool-card p{color:var(--muted);margin:0;font-size:.86rem;line-height:1.6}.form-card{border:1px solid var(--line);background:#fff;max-width:800px;margin:8px 0 23px;padding:28px}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:19px;display:grid}.form-field{flex-direction:column;gap:7px;display:flex}.form-field label{color:#35453c;font-size:.82rem;font-weight:760}.form-field input,.form-field select,.search-input{width:100%;min-height:46px;color:var(--ink);background:#fff;border:1px solid #aebcb4;border-radius:3px;padding:11px 13px}.form-field input:focus,.form-field select:focus,.search-input:focus{border-color:var(--accent)}.button{background:var(--accent);color:#fff;border:1px solid var(--accent);justify-content:center;align-items:center;gap:8px;min-height:46px;padding:11px 19px;font-size:.87rem;font-weight:750;transition:background .16s;display:inline-flex}.button:hover{color:#fff;background:var(--accent-dark)}.button.secondary{color:var(--accent);background:#fff}.button.secondary:hover{background:var(--paper)}.actions{flex-wrap:wrap;gap:11px;margin-top:24px;display:flex}.results{border-top:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:28px 0 0;padding-top:24px;display:grid}.results b{letter-spacing:-.035em;overflow-wrap:anywhere;font-variant-numeric:tabular-nums;font-size:1.45rem;line-height:1.2;display:block}.results span{color:var(--muted);margin-top:8px;font-size:.78rem;line-height:1.45;display:block}.calculator-note{color:var(--muted);max-width:800px;font-size:.86rem;line-height:1.8}.calculator-guide{border-top:2px solid var(--ink);max-width:800px;margin:43px 0 75px;padding-top:22px}.calculator-guide h2{letter-spacing:-.02em;margin:20px 0 12px;font-family:Georgia,serif;font-size:1.8rem;font-weight:500}.calculator-guide p{color:#4b6054;margin:0 0 17px;line-height:1.85}.calculator-guide ul{color:#4b6054;line-height:1.7}.search-results{gap:0;max-width:800px;padding:24px 0 72px;display:grid}.search-result{border-bottom:1px solid var(--line);padding:21px 0}.search-result:first-child{border-top:2px solid var(--ink)}.search-result h2{margin:5px 0 8px;font-family:Georgia,serif;font-size:1.37rem;font-weight:500;line-height:1.35}.search-result p{color:var(--muted);margin:0;font-size:.88rem}.site-footer{border-top:1px solid var(--ink);background:var(--paper);padding:55px 0 24px}.footer-main{grid-template-columns:1.3fr 1fr 1fr;gap:72px;display:grid}.footer-brand p{max-width:325px;color:var(--muted);margin:18px 0 0;font-size:.88rem;line-height:1.75}.footer-brand .footer-note{color:#718078;font-size:.78rem}.footer-title{text-transform:uppercase;letter-spacing:.105em;color:var(--ink);margin:4px 0 19px;font-size:.7rem;font-weight:850}.footer-links{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px 18px;display:grid}.footer-links a{color:#40594c;font-size:.82rem;line-height:1.4}.footer-bottom{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:16px;margin-top:54px;padding-top:22px;font-size:.74rem;display:flex}.cookie-banner{z-index:40;border:1px solid var(--ink);background:#fff;width:min(540px,100% - 30px);padding:22px;position:fixed;bottom:16px;left:50%;transform:translate(-50%);box-shadow:0 16px 44px #0002}.cookie-banner p{color:var(--muted);margin:8px 0 16px;font-size:.88rem}.cookie-banner p a{text-decoration:underline}.cookie-actions{gap:10px;display:flex}.cookie-actions button{border:1px solid var(--ink);background:#fff;min-height:40px;padding:8px 14px;font-weight:750}.cookie-actions .accept{background:var(--ink);color:#fff}.visually-hidden{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width<=1140px){.primary-nav{gap:18px}.primary-nav a{font-size:.77rem}.lead-grid{gap:32px}.front-page-aside{padding-left:24px}.directory-inner{gap:20px}.directory-inner nav{gap:12px 22px}.tools-section-layout{gap:50px}}@media (width<=920px){.primary-nav{display:none}.mobile-menu{display:block}.nav-side{margin-left:auto}.lead-grid{grid-template-columns:1fr;gap:42px}.front-page-aside{border-left:0;border-top:2px solid var(--ink);grid-template-columns:repeat(3,minmax(0,1fr));gap:0 20px;padding-top:23px;padding-left:0;display:grid}.aside-title,.aside-bottom{grid-column:1/-1}.aside-story{grid-template-columns:22px 1fr}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 25px}.reading-layout{grid-template-columns:1fr;gap:22px}.sidebar{border-top:1px solid var(--line);padding-bottom:24px;position:static}.standards-layout,.footer-main{gap:40px}}@media (width<=720px){.container{width:min(calc(100% - 34px),var(--max))}.masthead-strip-inner>span:last-child{display:none}.masthead-strip-inner{padding-block:8px;font-size:.61rem}.header-inner{min-height:75px}.wordmark{font-size:1.85rem}.header-tagline,.header-search span{display:none}.header-search{border:0;padding:5px}.nav-inner{min-height:43px}.nav-side{font-size:.59rem}.edition-line{padding:21px 0 17px}.edition-line>span:last-child{display:none}.lead-grid{padding:30px 0 44px}.lead-story h1{font-size:clamp(2.85rem,10vw,4.1rem)}.lead-deck{font-size:1.01rem}.chart-feature{padding:18px 14px 15px}.front-page-aside{grid-template-columns:1fr}.aside-story{padding:19px 0}.directory-inner{padding:20px 0;display:block}.directory-label{margin-bottom:11px;display:block}.directory-inner nav{gap:9px 18px}.directory-inner nav a{font-size:.82rem}.section{padding:53px 0}.section-head{margin-bottom:21px;display:block}.section-head p{margin-top:17px}.card-grid{border-top:2px solid var(--ink);grid-template-columns:1fr}.card-copy{padding:23px 0}.article-card h3{font-size:1.54rem}.tools-section{padding:55px 0}.tools-section-layout,.standards-layout{grid-template-columns:1fr;gap:34px}.tools-intro h2{font-size:clamp(2.6rem,9vw,3.7rem)}.standards-copy{padding-top:17px}.footer-main{grid-template-columns:1fr;gap:28px}.footer-bottom{display:block}.footer-bottom span{margin-top:8px;display:block}.reading-layout{padding-bottom:53px}.article-hero h1{font-size:clamp(2.6rem,9vw,3.65rem)}.article-prose{font-size:1rem;line-height:1.8}.article-prose h2{margin-top:37px}.form-grid,.results{grid-template-columns:1fr}.form-card{padding:20px 16px}.results{gap:17px}.results>div{border-bottom:1px solid var(--line);padding-bottom:13px}.tool-grid{grid-template-columns:1fr}.tool-card{min-height:160px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}.article-reading{padding-top:36px}.sidebar-extra{margin-top:28px}.archive-section{padding-top:21px}.archive-heading{border-top:2px solid var(--ink);border-bottom:1px solid var(--line);text-transform:uppercase;letter-spacing:.095em;color:var(--muted);justify-content:space-between;align-items:center;gap:20px;margin-bottom:23px;padding:13px 0;font-size:.72rem;font-weight:800;display:flex}.archive-heading a{color:var(--accent)}.archive-section .card-grid{border-top:0}.archive-section-title{letter-spacing:-.04em;margin:0 0 18px;font-family:Georgia,serif;font-size:clamp(1.9rem,3.3vw,2.7rem);font-weight:500}.tool-link{color:var(--accent);margin-top:auto;padding-top:22px;font-size:.8rem;font-weight:800}.calc-submit{margin-top:24px}.calc-error{color:#a22f26;font-size:.85rem}.search-label{margin-bottom:8px;font-size:.82rem;font-weight:800;display:block}.search-input{max-width:800px;font-size:1.05rem}.not-found{text-align:center;padding:80px 0 110px}.not-found h1{letter-spacing:-.055em;margin:12px 0;font-family:Georgia,serif;font-size:clamp(2.8rem,7vw,5rem);font-weight:500;line-height:1.15}.not-found p{color:var(--muted)}.not-found .actions{justify-content:center}@media (width<=720px){.archive-heading{font-size:.66rem}.not-found{padding:60px 0 80px}}