:root{--paper:#faf8f3;--surface:#fffefb;--ink:#252e2c;--green:#244b43;--green-dark:#17362f;--muted:#606b65;--line:#d9ddd2;--tint:#eef0e7;--gold:#a17443;--serif:Georgia,'Times New Roman',serif;--sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:2rem}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}a{color:var(--green);text-underline-offset:4px;text-decoration-thickness:1px}a:hover{color:var(--green-dark)}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--gold);outline-offset:4px}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.14;letter-spacing:-.025em}h1{font-size:clamp(3.1rem,6vw,5.4rem);margin-bottom:1.55rem}h2{font-size:clamp(2rem,3.4vw,3.15rem);margin-bottom:1.2rem}h3{font-size:1.55rem;margin-bottom:1rem}p{margin-bottom:1.15rem}strong{font-weight:650}em{font-weight:400;color:var(--green)}sub,sup{font-size:.68em}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em}p code{background:var(--tint);padding:.08em .25em;border-radius:3px}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#eef0e8;border:1px solid var(--line);padding:1.35rem 1.5rem;border-radius:5px;line-height:1.65;font-size:.91rem;tab-size:2;max-width:100%}pre code{font-size:inherit}.wrap{width:min(1152px,calc(100% - 96px));margin:0 auto}.skip-link{position:absolute;left:16px;top:-100px;background:var(--green);color:white;padding:12px 18px;z-index:99}.skip-link:focus{top:10px}.site-header{border-top:5px solid var(--green);border-bottom:1px solid var(--line)}.header-inner{width:min(1280px,calc(100% - 96px));margin:auto;min-height:104px;display:flex;justify-content:space-between;align-items:center;gap:32px}.brand{font-family:var(--serif);font-size:31px;line-height:1.05;text-decoration:none;white-space:nowrap}.brand-comma{color:var(--gold)}.brand i{font-weight:400}.brand-sub{display:block;font:9.5px/1.4 var(--sans);letter-spacing:.185em;text-transform:uppercase;color:var(--muted);margin-top:10px}.site-header nav{display:flex;align-items:center;gap:29px;font-size:14px;font-weight:500}.site-header nav a{text-decoration:none;padding:10px 0;border-bottom:1px solid transparent}.site-header nav a[aria-current=page]:not(.nav-cta),.site-header nav a:hover:not(.nav-cta){border-bottom-color:var(--green)}.site-header nav a.nav-cta{padding:10px 20px;border:1px solid var(--green);border-radius:3px}.site-header nav a.nav-cta:hover,.site-header nav a.nav-cta[aria-current=page]{background:var(--green);color:#fff}.home-hero{display:grid;grid-template-columns:1.45fr 1fr;gap:75px;align-items:center;padding-top:77px;padding-bottom:77px}.hero-copy h1{font-size:clamp(3.3rem,5.8vw,5.3rem);letter-spacing:-.045em;line-height:1.045;margin-bottom:26px}.eyebrow{text-transform:uppercase;font-size:11px;line-height:1.6;letter-spacing:.16em;font-weight:650;color:var(--green);margin-bottom:1.35rem}.small-rule{display:inline-block;width:26px;height:1px;background:var(--gold);vertical-align:middle;margin:0 8px 3px 0}.hero-lead{font-family:var(--serif);font-size:21px;line-height:1.6;margin-bottom:16px}.hero-detail{color:var(--muted);max-width:520px;font-size:16px;line-height:1.8}.actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-top:27px}.button{display:inline-flex;gap:19px;justify-content:center;align-items:center;padding:12px 19px;background:var(--green);color:#fff;text-decoration:none;font-size:14px;line-height:1.5;font-weight:550;border:1px solid var(--green);border-radius:3px;min-height:47px}.button:hover{background:var(--green-dark);color:#fff;border-color:var(--green-dark)}.button-outline{background:transparent;color:var(--green)}.button-outline:hover{background:var(--tint);color:var(--green)}.button-light{background:var(--paper);border-color:var(--paper);color:var(--green);white-space:nowrap}.button-light:hover{background:#fff;color:var(--green)}.text-link{font-size:14px;font-weight:600;text-decoration:none;border-bottom:1px solid #a4b2a7;padding-bottom:3px;display:inline-block;line-height:1.5}.text-link:hover{border-color:var(--green)}.quiet{font-size:13px;line-height:1.7;color:var(--muted)}.hero-caption{margin:21px 0 0;font-size:12px}.hero-note{background:var(--tint);border:1px solid #d3d9ca;border-radius:4px;padding:34px 32px 32px;position:relative;margin-top:20px}.hero-note:before{content:'';position:absolute;width:42px;height:3px;background:var(--gold);top:-2px;left:32px}.note-index{font-size:10px;letter-spacing:.17em;color:var(--muted)}.math-line{font-family:var(--serif);font-size:32px;text-align:center;letter-spacing:.03em;padding:38px 0;color:var(--green)}.note-rule{height:1px;background:#c8d1c1;margin-bottom:29px}.note-title{font-family:var(--serif);font-size:25px;line-height:1.35;letter-spacing:-.02em;margin-bottom:17px}.hero-note>p:not(.note-title):not(.note-index){font-size:14px;color:var(--muted);line-height:1.8}.note-caption{display:block;font-size:10px;color:var(--muted);line-height:1.7;margin-top:19px}.facts-strip{background:#efeee6;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.facts-inner{display:grid;grid-template-columns:1fr 1fr 1fr;padding-top:23px;padding-bottom:23px}.facts-inner>div{padding-left:35px;border-left:1px solid #cbd1c4}.facts-inner>div:first-child{padding-left:0;border-left:none}.fact-top{display:block;font-family:var(--serif);font-size:22px;margin-bottom:1px}.fact-bottom{display:block;font-size:12px;color:var(--muted)}.section{padding-top:73px;padding-bottom:67px}.section-heading{max-width:700px;margin-bottom:37px}.section-heading>p:not(.eyebrow){max-width:630px;color:var(--muted)}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:46px}.feature{border-top:1px solid var(--line);padding-top:24px}.number{font-family:var(--serif);font-size:18px;color:var(--gold);display:block;margin-bottom:20px}.feature h3{font-size:25px}.feature p{color:var(--muted);font-size:14px;line-height:1.85;margin-bottom:23px}.two-grid{display:grid;grid-template-columns:1fr 1fr;gap:27px}.split-callout{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:85px;align-items:center}.split-callout>div>p:not(.eyebrow){font-size:15px;color:var(--muted)}.announcement{padding:32px;background:var(--surface);border:1px solid var(--line);border-radius:4px}.announcement h3{margin-top:23px;font-size:26px}.pill{display:inline-block;border:1px solid #c8d2c0;padding:4px 10px;border-radius:40px;font-size:10px;letter-spacing:.055em;color:var(--green);font-weight:650;text-transform:uppercase;background:#f6f7f0;line-height:1.6}.lean-banner{margin-top:13px;margin-bottom:80px;padding:42px;background:var(--green);border-radius:4px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:40px}.lean-banner .eyebrow{color:#e6d3a9;margin-bottom:12px}.lean-banner h2{font-size:36px}.lean-banner p:not(.eyebrow){max-width:620px;color:#e3e7df;font-size:15px;margin-bottom:0}.site-footer{border-top:1px solid var(--line)}.footer-inner{width:min(1152px,calc(100% - 96px));margin:auto;display:flex;align-items:flex-start;justify-content:space-between;gap:40px;padding:39px 0 22px}.footer-brand{font-family:var(--serif);font-size:24px;text-decoration:none}.footer-inner p{font-size:12px;color:var(--muted);margin:9px 0}.footer-links{display:flex;flex-wrap:wrap;gap:15px 24px;padding-top:10px;max-width:520px;font-size:12px}.footer-links a{text-decoration:none}.footer-links a:hover{text-decoration:underline}.footer-bottom{width:min(1152px,calc(100% - 96px));margin:auto;padding:15px 0 25px;border-top:1px solid var(--line);font-size:10px;color:var(--muted);letter-spacing:.02em}.page-wrap{padding-top:64px;padding-bottom:82px}.page-heading{max-width:870px;margin-bottom:42px}.page-heading h1{font-size:clamp(3rem,5.3vw,4.8rem);line-height:1.08;letter-spacing:-.04em}.lead{font-size:19px;color:var(--muted);line-height:1.75;max-width:780px}.notice{background:var(--tint);border-left:3px solid var(--gold);padding:20px 24px;font-size:14px;line-height:1.8;margin:26px 0 37px}.notice strong{color:var(--green)}.section-small{padding-top:40px;padding-bottom:25px}.route-card{padding:35px;border:1px solid var(--line);border-radius:4px;background:var(--surface)}.route-card h2{font-size:35px;margin-top:23px}.route-card p{font-size:15px;color:var(--muted)}.library-route{padding:30px 0 0;max-width:890px}.library-route h3{font-size:25px}.library-route p{font-size:15px;color:var(--muted)}.simple-card{border:1px solid var(--line);border-radius:4px;padding:28px;background:var(--surface)}.simple-card h3{font-size:25px}.simple-card p{font-size:14px;line-height:1.85;color:var(--muted)}.simple-card p:last-child{margin-bottom:0}.prose{max-width:830px}.prose h2{font-size:31px;margin-top:40px;margin-bottom:18px}.prose h3{font-size:24px;margin-top:30px}.prose p{font-size:16px;line-height:1.9}.article-body{margin-top:40px}.article-label{font-size:12px;color:var(--muted);padding-bottom:23px;border-bottom:1px solid var(--line)}.equation{font-family:var(--serif);font-size:clamp(19px,2.6vw,26px);line-height:1.75;margin:24px 0;padding:23px 25px;background:var(--tint);border-radius:3px;overflow-x:auto}.bottom-cta{margin-top:45px;padding:34px 0 0;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:30px}.bottom-cta h2{font-size:27px;margin:0}.library-empty{background:var(--tint);border:1px solid var(--line);padding:47px;border-radius:4px}.library-empty h2{font-size:34px;margin:25px 0 18px}.library-empty p{max-width:690px;color:var(--muted)}.digest-preview{display:block;text-decoration:none;padding:32px;border:1px solid var(--line);border-radius:4px;background:var(--surface);max-width:850px}.digest-preview:hover{border-color:var(--green);background:#f5f5ee}.digest-meta{display:flex;gap:15px;align-items:center;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:25px}.digest-preview h3{font-size:32px}.digest-preview p{font-size:15px;color:var(--muted);max-width:700px}.submission-layout{display:grid;grid-template-columns:minmax(0,1fr) 295px;gap:60px}.submission-aside{padding-top:32px}.submission-aside .simple-card{margin-bottom:25px;padding:25px}.submission-aside .simple-card h3{font-size:24px}.entry-form fieldset{border:0;margin:0 0 30px;padding:24px 0 12px;min-width:0}.entry-form legend{font-family:var(--serif);font-size:26px;line-height:1.3;padding:0;max-width:100%}.entry-form legend .number{display:inline-block;margin:0 12px 0 0;font-size:20px}label{display:block;font-size:14px;font-weight:600;margin:17px 0 8px}.required{color:var(--gold)}input,select,textarea{width:100%;padding:11px 13px;background:var(--surface);color:var(--ink);border:1px solid #afb9ac;border-radius:3px;font-size:15px;line-height:1.6}textarea{resize:vertical;min-height:95px}input::placeholder,textarea::placeholder{color:#6b746d;opacity:1}select{min-height:48px}.field-hint{font-size:12px;color:var(--muted);line-height:1.75;margin-top:7px;margin-bottom:23px}.checkbox-label{display:flex;align-items:flex-start;gap:12px;font-size:13px;font-weight:400;line-height:1.8;margin-top:27px}.checkbox-label input{width:18px;height:18px;flex-shrink:0;margin-top:4px;accent-color:var(--green)}.form-error{padding:15px 19px;border:1px solid #a05944;background:#fff0e9;color:#81341d;font-size:14px}.draft-panel{padding:28px;background:var(--tint);border:1px solid var(--line);border-radius:4px;margin-top:35px}.draft-panel h2{font-size:29px}.draft-panel p{font-size:14px}.draft-panel textarea{font-size:13px;background:#fff;line-height:1.7}.email-address{overflow-wrap:anywhere}.draft-panel .actions{gap:12px}.copy-feedback{font-size:13px!important;color:var(--green);min-height:1.4em;margin-top:9px}.small-button{padding:9px 14px;border:1px solid var(--green);border-radius:3px;background:transparent;color:var(--green);font-size:13px;font-weight:550;line-height:1.6}.small-button:hover{background:var(--tint)}.prompt-block{font-size:13px}details{border:1px solid var(--line);border-radius:3px;padding:20px 24px;margin:30px 0}summary{cursor:pointer;font-weight:600;color:var(--green);font-size:14px}details[open] summary{margin-bottom:20px}[hidden]{display:none!important}
@media(max-width:1100px){.site-header nav{gap:19px}.home-hero{gap:38px}.hero-copy h1{font-size:4.5rem}.hero-note{padding:27px}.hero-copy .actions{align-items:flex-start;gap:20px}.three-grid{gap:28px}.split-callout{gap:44px}.submission-layout{gap:30px;grid-template-columns:minmax(0,1fr) 260px}.footer-inner{gap:25px}.footer-links{max-width:400px}}
@media(max-width:800px){.wrap,.header-inner,.footer-inner,.footer-bottom{width:calc(100% - 48px)}.header-inner{padding:21px 0 16px;flex-wrap:wrap;gap:19px;min-height:0}.brand{font-size:28px}.brand-sub{font-size:9px}.site-header nav{gap:21px;justify-content:space-between;width:100%;font-size:13px}.site-header nav a.nav-cta{padding:7px 13px}.home-hero{grid-template-columns:1fr 1fr;gap:24px;padding-top:46px;padding-bottom:46px}.hero-copy h1{font-size:3.35rem}.hero-lead{font-size:18px}.hero-detail{font-size:14px}.hero-note{padding:26px 22px}.math-line{font-size:25px;padding:23px 0}.note-title{font-size:22px}.hero-note .text-link{font-size:12px}.note-caption{font-size:9px}.hero-caption{font-size:11px}.hero-copy .eyebrow{font-size:9px}.facts-inner>div{padding-left:20px}.fact-top{font-size:20px}.fact-bottom{font-size:11px}.section{padding-top:47px;padding-bottom:44px}.three-grid{gap:25px}.feature h3{font-size:23px}.split-callout{gap:30px}.lean-banner{padding:30px;gap:24px;margin-bottom:50px}.lean-banner h2{font-size:30px}.lean-banner p:not(.eyebrow){font-size:13px}.lean-banner .button{font-size:12px}.footer-inner{flex-direction:column;gap:12px}.footer-links{max-width:none}.page-wrap{padding-top:45px;padding-bottom:55px}.page-heading h1{font-size:3.8rem}.lead{font-size:17px}.submission-layout{grid-template-columns:1fr}.submission-aside{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding-top:0}.route-card{padding:26px}.route-card h2{font-size:30px}.bottom-cta{align-items:flex-start;flex-direction:column}.library-empty{padding:32px}}
@media(max-width:560px){body{font-size:15px}.wrap,.header-inner,.footer-inner,.footer-bottom{width:calc(100% - 36px)}.site-header nav{gap:8px;font-size:11.5px}.site-header nav a.nav-cta{padding:7px 10px}.home-hero{grid-template-columns:1fr;padding-top:39px;padding-bottom:35px;gap:26px}.hero-copy h1{font-size:clamp(3.15rem,12vw,4.35rem)}.hero-copy .eyebrow{font-size:9px}.hero-lead{font-size:20px}.hero-detail{font-size:15px}.hero-copy .actions{gap:19px;margin-top:25px}.hero-caption{font-size:11px}.hero-note{margin-top:8px;padding:26px 24px}.math-line{font-size:31px;padding:22px 0}.note-title{font-size:25px}.note-rule{margin-bottom:21px}.hero-note .text-link{font-size:14px}.note-caption{font-size:10px}.facts-inner{grid-template-columns:1fr;gap:0;padding-top:4px;padding-bottom:4px}.facts-inner>div,.facts-inner>div:first-child{border-left:0;border-bottom:1px solid #d2d6ca;padding:15px 0;display:flex;align-items:center;justify-content:space-between;gap:16px}.facts-inner>div:last-child{border-bottom:0}.fact-top{font-size:19px;flex-shrink:0}.fact-bottom{text-align:right;font-size:11px;max-width:185px}.three-grid,.two-grid,.split-callout{grid-template-columns:1fr;gap:26px}.section-heading{margin-bottom:25px}.feature{padding-top:21px}.feature .number{margin-bottom:14px}.feature p{margin-bottom:14px}.split-callout{gap:26px}.lean-banner{display:block;padding:27px;margin-top:7px;margin-bottom:42px}.lean-banner .button{margin-top:23px;font-size:14px}.footer-inner{padding-top:30px}.footer-links{gap:13px 22px}.footer-bottom{font-size:9px}.page-heading h1{font-size:3.25rem}.page-heading{margin-bottom:29px}.lead{font-size:16px}.notice{padding:17px 18px;font-size:13px;margin-top:20px}.section-small{padding-top:25px;padding-bottom:17px}.route-card{padding:26px}.route-card h2{font-size:33px}.prose h2{font-size:27px}.prose h3{font-size:23px}.prose p{font-size:15px}.simple-card{padding:24px}.library-empty{padding:27px}.library-empty h2{font-size:29px}.digest-preview{padding:25px}.digest-preview h3{font-size:28px}.submission-aside{grid-template-columns:1fr;gap:0}.entry-form legend{font-size:24px}.draft-panel{padding:20px}.draft-panel .actions{align-items:stretch;flex-direction:column}.entry-form fieldset{padding-top:18px}.equation{padding:20px 17px}.button{font-size:13px}.desktop-break{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
@media print{body{background:#fff;color:#000}.site-header nav,.site-footer,.actions,button,.skip-link,.submission-aside{display:none!important}.site-header{border-top:0}.header-inner{min-height:70px}.wrap,.header-inner{width:100%}.page-wrap{padding:15px 0}.page-heading h1{font-size:35px}.home-hero{padding:25px 0}.notice,.simple-card,.route-card,.hero-note{break-inside:avoid}.prose{max-width:none}.section{padding:25px 0}.lean-banner{background:#fff;color:#000;border:1px solid #888}.lean-banner p:not(.eyebrow),.lean-banner .eyebrow{color:#000}h2,h3{break-after:avoid}a{color:#000}pre{white-space:pre-wrap}input,textarea,select{border:1px solid #777}}
.brand{display:inline-flex;align-items:center;gap:12px}.brand-mark{display:block;width:44px;height:44px;flex:none;border-radius:9px}.brand-wordmark{display:block}
@media(max-width:560px){.brand{gap:9px}.brand-mark{width:38px;height:38px}}
@media(max-width:560px){.site-header nav{flex-wrap:wrap;justify-content:flex-start;gap:4px 16px}}
.purpose-section{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.purpose-section .section-heading{margin-bottom:20px}.purpose-section .prose p:last-child{margin-bottom:0}
.library-categories{margin:0 0 34px}.library-categories>a{display:block;color:var(--ink);text-decoration:none}.library-categories>a:hover{border-color:var(--green);background:#f5f5ee}.library-categories h2{font-size:27px;margin:10px 0}.library-categories p{margin-bottom:18px}.library-category{scroll-margin-top:25px;border-top:1px solid var(--line)}.category-empty{background:var(--tint);border:1px solid var(--line);padding:27px 30px}.category-empty p{margin-bottom:10px;color:var(--muted)}