/* NeverTrade — original, dependency-free design. No remote fonts. */
:root{--paper:#f5f4ed;--white:#fffef9;--ink:#1c2923;--muted:#59665d;--line:#d8dbcf;--lime:#d6ef87;--lime-dark:#536b2d;--red:#a73d2d;--peach:#f0c9b4;--soft:#e9ede3;--radius:18px;--max:1200px;--sans:Arial,Helvetica,sans-serif;--serif:Georgia,'Times New Roman',serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:inherit;text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}img,svg{max-width:100%;height:auto}a,button{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #758f32;outline-offset:4px}::selection{background:var(--lime);color:var(--ink)}[hidden]{display:none!important}.container{max-width:var(--max);margin:0 auto;padding:0 30px}.narrow{max-width:820px}.section{padding:86px 0}.section-sm{padding:48px 0}.line-top{border-top:1px solid var(--line)}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.15em;text-transform:uppercase;display:flex;align-items:center;gap:10px;margin:0 0 24px}.eyebrow::before{content:'';width:7px;height:7px;background:var(--lime-dark);border-radius:50%;flex-shrink:0}.dark .eyebrow::before{background:var(--lime)}h1,h2,h3,h4,p{margin-top:0}h1,h2,h3,h4{line-height:1.1;letter-spacing:-.045em}h1{font-size:clamp(42px,6.2vw,78px);font-weight:750;margin-bottom:26px}h2{font-size:clamp(30px,3.6vw,47px);margin-bottom:20px}h3{font-size:25px;margin-bottom:14px}h4{font-size:19px}p{margin-bottom:20px}.lead{font-size:20px;line-height:1.65;color:var(--muted);max-width:660px}.small{font-size:13px;line-height:1.6}.muted{color:var(--muted)}.serif{font-family:var(--serif);font-weight:400;font-style:italic}.text-link{text-decoration:none;font-size:14px;font-weight:700;display:inline-flex;align-items:center;gap:10px}.text-link:hover{text-decoration:underline}.arrow{font-size:22px;font-weight:400;line-height:1}.actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--ink);background:var(--ink);color:var(--white);text-decoration:none;border-radius:8px;font-weight:700;font-size:14px;line-height:1.25;padding:16px 23px;min-height:48px;transition:transform .15s,background .15s}.btn:hover{background:#34483a;transform:translateY(-2px)}.btn.secondary{background:transparent;color:var(--ink);border-color:#b9c1b4}.btn.secondary:hover{background:var(--soft)}.btn.lime{background:var(--lime);color:var(--ink);border-color:var(--lime)}.btn.lime:hover{background:#e2faa1}.btn.white{background:var(--white);color:var(--ink);border-color:var(--white)}.btn.small-btn{padding:11px 16px;font-size:13px;min-height:42px}.btn.full{width:100%}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);background:transparent;border-radius:8px;flex-shrink:0}.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.skip{position:fixed;top:-100px;left:20px;z-index:1000;padding:12px 20px;background:var(--ink);color:white}.skip:focus{top:12px}.site-header{position:sticky;top:0;z-index:100;background:rgba(245,244,237,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.header-inner{min-height:86px;display:flex;align-items:center;gap:30px}.logo{display:inline-flex;gap:10px;align-items:center;text-decoration:none;font-size:25px;font-weight:800;letter-spacing:-1.2px;white-space:nowrap}.brand-mark{width:30px;height:30px;background:var(--ink);border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:var(--lime);font-size:26px;font-weight:400;letter-spacing:-4px;padding-right:4px;transform:rotate(-15deg)}.logo-dot{color:var(--lime-dark)}.nav{margin-left:auto;display:flex;align-items:center;gap:27px}.nav a{font-size:13px;text-decoration:none;font-weight:600;white-space:nowrap}.nav a:hover,.nav a[aria-current=page]{color:var(--lime-dark)}.header-end{display:flex;gap:10px;align-items:center}.support-link{font-size:12px!important;padding:9px 13px;border:1px solid #b9c1b4;border-radius:6px;white-space:nowrap}.menu-btn{display:none}.search-btn{border:0;width:34px}.hero{padding:76px 0 60px}.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:64px;align-items:center}.hero h1{font-size:clamp(60px,7.8vw,101px);line-height:.99;letter-spacing:-.072em;margin-bottom:26px}.hero h1 .serif{font-size:1.09em;position:relative;z-index:0}.hero h1 .serif:after{content:'';position:absolute;left:0;right:-12px;bottom:8px;background:var(--lime);height:20px;z-index:-1;transform:rotate(-2deg)}.hero .lead{max-width:500px;font-size:18px;margin-bottom:30px}.tiny-row{display:flex;gap:20px;flex-wrap:wrap;margin-top:25px;font-size:11px;font-weight:700;color:var(--muted)}.tiny-row span::before{content:'✓';padding-right:6px}.poster-scene{position:relative;padding:25px 16px 35px 8px}.hero-poster{background:var(--ink);color:var(--paper);padding:32px 34px 26px;border-radius:4px;transform:rotate(3deg);position:relative;box-shadow:14px 18px 0 #e4e6da;aspect-ratio:.86;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}.poster-top{display:flex;justify-content:space-between;border-bottom:1px solid #596259;padding-bottom:17px;font-size:10px;font-weight:bold;letter-spacing:1.5px}.poster-large{font-size:clamp(34px,4.8vw,60px);line-height:.97;font-weight:800;letter-spacing:-.05em;max-width:90%;z-index:2;margin:28px 0 24px}.poster-large span{color:var(--lime)}.poster-bottom{display:flex;justify-content:space-between;gap:20px;align-items:end;font-size:11px;z-index:2}.poster-bottom b{font-size:16px;letter-spacing:-.6px}.poster-orbit{width:150px;height:150px;border:1px solid #637152;border-radius:50%;position:absolute;right:-46px;bottom:86px}.poster-orbit:after,.poster-orbit:before{content:'';position:absolute;inset:15px;border:1px solid #637152;border-radius:50%}.poster-orbit:after{inset:30px}.poster-sticker{position:absolute;right:-6px;top:10px;background:var(--lime);border:1px solid var(--ink);padding:11px 14px;transform:rotate(9deg);font-size:11px;line-height:1.2;font-weight:700;box-shadow:3px 4px 0 var(--ink)}.poster-caption{font-family:var(--serif);font-style:italic;font-size:15px;position:absolute;bottom:-4px;left:26px;transform:rotate(-3deg)}.scope-note{border-top:1px solid var(--line);margin-top:57px;padding-top:24px;display:flex;gap:24px;align-items:baseline;font-size:13px;color:var(--muted)}.scope-note strong{white-space:nowrap;color:var(--ink)}.scope-note p{margin:0;max-width:925px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:34px}.section-head h2{margin-bottom:0}.section-head .lead{font-size:16px;max-width:430px;margin:0}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.card{border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:var(--white);min-width:0}.card-link{display:flex;flex-direction:column;text-decoration:none;transition:transform .2s,border-color .2s}.card-link:hover{transform:translateY(-5px);border-color:#94a37f}.card-link p{color:var(--muted);font-size:14px}.card-link .text-link{margin-top:auto}.card-number{font-family:var(--serif);font-size:15px;font-style:italic;color:var(--muted);margin-bottom:34px}.card-icon{width:50px;height:50px;border:1px solid var(--line);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:29px;margin-bottom:30px;background:var(--paper)}.card.soft{background:var(--soft)}.card.lime{background:var(--lime);border-color:var(--lime)}.card.lime p{color:#36482a}.pill{display:inline-block;border:1px solid var(--line);border-radius:30px;padding:5px 11px;font-size:10px;letter-spacing:.08em;font-weight:bold;text-transform:uppercase;line-height:1.4}.dark{background:var(--ink);color:var(--paper)}.dark .muted,.dark .lead{color:#c4cbbc}.dark .pill{border-color:#62705f}.evidence-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid #566250;margin-top:40px}.evidence-mini{padding:30px 30px 10px 0;margin-right:30px;border-right:1px solid #566250;display:flex;flex-direction:column}.evidence-mini:last-child{border:0;margin:0;padding-right:0}.stat{font-size:clamp(46px,5.6vw,74px);line-height:1;letter-spacing:-.055em;margin:6px 0 16px;font-weight:700}.dark .stat{color:var(--lime)}.evidence-mini p{font-size:15px;max-width:250px;margin-bottom:18px}.evidence-mini .source-line{margin-top:auto;color:#c4cbbc;font-size:11px;line-height:1.6}.source-line{font-size:12px;color:var(--muted);margin-bottom:0}.source-line a{overflow-wrap:anywhere}.math-preview{background:var(--white);border:1px solid var(--line);padding:34px;border-radius:var(--radius)}.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}.big-result{font-size:65px;font-weight:bold;line-height:1;letter-spacing:-.06em;overflow-wrap:anywhere}.big-result.red{color:var(--red)}.math-pair{display:grid;grid-template-columns:1fr auto 1fr;gap:24px;align-items:center;margin:30px 0}.math-pair small{display:block;font-size:12px;color:var(--muted);margin-top:8px}.math-pair>span{font-size:30px}.range-ends{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}input[type=range]{width:100%;accent-color:var(--lime-dark);cursor:pointer;min-height:32px;margin:8px 0 0}.share-preview{aspect-ratio:1.1;padding:28px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden;border-radius:10px;background:var(--lime);color:var(--ink);transition:transform .2s}.share-preview:hover{transform:rotate(-2deg)}.share-preview.ink{background:var(--ink);color:var(--lime)}.share-preview.peach{background:var(--peach)}.share-preview .stamp{font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.14em}.share-preview strong{font-size:clamp(28px,3.5vw,45px);line-height:1;letter-spacing:-.055em;display:block;margin:20px 0}.share-preview .brand{font-size:14px;letter-spacing:-.5px;font-weight:bold}.preview-link{text-decoration:none;display:block}.preview-label{display:flex;justify-content:space-between;font-size:12px;font-weight:bold;margin-top:12px}.quote-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;padding:52px;background:#e6eadd;border-radius:var(--radius)}.quote-section blockquote{font-family:var(--serif);font-size:28px;line-height:1.4;letter-spacing:-.6px;margin:0 0 26px}.quote-section .small{margin-bottom:0}.help-banner{background:var(--peach);border-radius:var(--radius);padding:38px 42px;display:flex;justify-content:space-between;gap:30px;align-items:center}.help-banner h2{font-size:29px;margin-bottom:10px}.help-banner p{font-size:14px;max-width:660px;margin:0}.site-footer{padding:55px 0 24px;border-top:1px solid var(--line);margin-top:40px}.footer-top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:38px}.footer-brand p{font-size:13px;color:var(--muted);max-width:285px;margin:18px 0}.footer-col h3{font-size:12px;letter-spacing:.06em;text-transform:uppercase;margin:5px 0 22px}.footer-col a{display:block;text-decoration:none;font-size:13px;margin-bottom:10px}.footer-col a:hover{text-decoration:underline}.footer-bottom{margin-top:35px;border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px}.footer-disclaimer{font-size:11px;color:var(--muted);max-width:1000px;margin:18px 0 0}.page-heading{padding:58px 0 42px}.page-heading h1{max-width:1000px}.page-heading .lead{max-width:750px}.breadcrumbs{font-size:11px;color:var(--muted);margin-bottom:28px}.breadcrumbs a{text-decoration:none}.page-heading .eyebrow{margin-bottom:20px}.page-subnav{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.page-subnav a{font-size:12px;padding:8px 13px;border:1px solid var(--line);border-radius:6px;text-decoration:none;background:var(--white)}.notice{padding:20px 24px;border:1px solid var(--line);border-left:3px solid var(--lime-dark);background:#eef0e6;border-radius:0 10px 10px 0;font-size:13px;line-height:1.65;margin:22px 0}.notice p:last-child{margin-bottom:0}.notice.warning{background:#fae9df;border-left-color:var(--red)}.notice strong{display:inline}.filters{display:flex;gap:9px;flex-wrap:wrap;align-items:center;margin-bottom:30px}.filter-btn{background:transparent;border:1px solid var(--line);border-radius:30px;padding:10px 17px;font-size:12px;min-height:42px}.filter-btn[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:var(--paper)}.search-field{position:relative;flex:1;min-width:220px}.search-field input{padding-left:42px}.search-field .icon{position:absolute;left:14px;top:15px;color:var(--muted)}input:not([type=range]):not([type=checkbox]):not([type=radio]),textarea,select{width:100%;border:1px solid #bdc5b7;background:var(--white);border-radius:7px;padding:12px 13px;min-height:48px;color:var(--ink);font-size:15px}textarea{resize:vertical;line-height:1.55}label,.field-label{display:block;font-size:12px;font-weight:700;margin-bottom:7px}input[type=checkbox]{width:19px;height:19px;accent-color:var(--lime-dark);flex-shrink:0}input[type=radio]{accent-color:var(--lime-dark)}.field{margin-bottom:20px}.field small{display:block;color:var(--muted);font-size:11px;margin-top:6px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.check-label{display:flex;align-items:flex-start;gap:10px;font-weight:400;font-size:13px;line-height:1.55;cursor:pointer}.check-label input{margin-top:2px}.source-card{display:flex;flex-direction:column;scroll-margin-top:110px}.source-card .card-top{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:22px}.source-card h2{font-size:27px}.source-card .source-stat{font-size:42px;font-weight:700;line-height:1.1;letter-spacing:-.05em;margin-bottom:12px}.source-card p{font-size:14px}.source-card .source-scope{font-size:11px;font-weight:700;color:var(--lime-dark);margin-bottom:16px}.source-card .limit{border-top:1px solid var(--line);padding-top:15px;font-size:12px;color:var(--muted);margin-top:auto}.source-card .actions{margin-top:6px}.filter-count{font-size:12px;color:var(--muted);margin-top:-15px;margin-bottom:24px}.empty{padding:35px;border:1px dashed #b9c1b4;border-radius:10px}.read-layout{display:grid;grid-template-columns:230px minmax(0,750px);gap:64px;align-items:start}.read-sidebar{position:sticky;top:114px;font-size:12px;max-height:calc(100dvh - 150px);overflow:auto;padding-right:10px}.toc-title{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;margin-bottom:15px}.read-sidebar a{display:block;padding:8px 0;color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line);font-size:12px}.read-sidebar a.active{color:var(--lime-dark);font-weight:bold}.read-sidebar .actions{margin-top:20px}.read-sidebar .btn{font-size:11px}.article{font-size:17px;line-height:1.85}.article h2{font-family:var(--sans);font-size:32px;line-height:1.2;margin:55px 0 23px}.article h3{font-size:23px;margin:30px 0 18px}.article p{margin-bottom:22px}.article a{overflow-wrap:anywhere}.article>p,.article .original-content>p{font-family:var(--serif)}.article .intro-letter p{font-family:var(--serif)}.article ul{padding-left:24px}.article li{padding-left:4px;margin-bottom:12px}.article [id]{scroll-margin-top:115px}.article .editor-note{font-size:12px;line-height:1.65;font-family:var(--sans);border-left:3px solid #93a478;background:#eaf0df;padding:14px 17px;margin:16px 0 26px;border-radius:0 7px 7px 0}.article.large-text{font-size:21px}.article .editor-note b{display:block;margin-bottom:4px}.original-content h2 .anchor{font-size:18px;margin-left:8px;text-decoration:none;opacity:.5}.letter-meta{font-size:12px;color:var(--muted);display:flex;gap:20px;flex-wrap:wrap;margin-top:25px}.reading-progress{height:3px;background:var(--lime-dark);width:0;position:fixed;top:86px;left:0;z-index:101;transition:width .1s}.article-action{margin-top:40px}.video-frame{aspect-ratio:16/9;background:var(--ink);color:var(--paper);position:relative;overflow:hidden;border-radius:12px}.video-frame iframe{width:100%;height:100%;border:0}.video-load{width:100%;height:100%;border:0;padding:25px;background:none;color:inherit;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:13px;position:relative}.video-load:before{content:'';position:absolute;inset:0;background-image:radial-gradient(#627158 1px,transparent 1px);background-size:17px 17px;opacity:.25}.video-load>*{position:relative}.play-circle{width:56px;height:56px;background:var(--lime);color:var(--ink);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:21px;padding-left:4px;transition:transform .2s}.video-load:hover .play-circle{transform:scale(1.1)}.video-load strong{font-size:19px;letter-spacing:-.5px;text-align:center}.video-load small{font-size:10px;color:#d1d9c8}.video-item h3{font-size:24px;margin-top:22px}.video-item .small{color:var(--muted)}.video-item .video-index{font-family:var(--serif);font-style:italic;font-size:15px}.video-meta{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:12px}.video-card{border-bottom:1px solid var(--line);padding-bottom:25px}.video-item{scroll-margin-top:110px}.original-video{margin:30px 0}.original-video figcaption{font-family:var(--sans);font-size:11px;color:var(--muted);margin-top:10px}.guide-card h3{font-size:27px}.guide-card .card-number{margin-bottom:22px}.guide-card .pill{align-self:flex-start;margin-bottom:22px}.guide-layout{display:grid;grid-template-columns:250px 1fr;gap:60px}.guide-side{border-top:1px solid var(--line);padding-top:22px}.guide-side .big-symbol{font-size:70px;font-family:var(--serif);margin-bottom:12px}.guide-side p{font-size:13px;color:var(--muted)}.guide-article h2:first-child{margin-top:0}.guide-article p{font-family:var(--sans)}details{border-bottom:1px solid var(--line);padding:21px 0}summary{font-size:17px;font-weight:700;cursor:pointer;line-height:1.45;position:relative;padding-right:35px;list-style:none}summary::-webkit-details-marker{display:none}summary::after{content:'+';position:absolute;right:2px;font-size:23px;top:-2px;font-weight:400}details[open]>summary::after{content:'−'}details>p,details>.details-body{font-size:14px;line-height:1.8;color:var(--muted);margin:16px 0 5px;max-width:850px}.glossary-grid{columns:2;column-gap:45px}.glossary-term{break-inside:avoid;border-bottom:1px solid var(--line);padding:18px 0}.glossary-term dt{font-size:17px;font-weight:700;letter-spacing:-.3px;margin-bottom:7px}.glossary-term dd{font-size:13px;color:var(--muted);margin:0}.tool-layout{display:grid;grid-template-columns:215px 1fr;gap:30px;align-items:start}.tool-nav{position:sticky;top:110px;display:flex;flex-direction:column;gap:8px}.tool-tab{border:1px solid transparent;padding:15px 16px;background:transparent;text-align:left;border-radius:9px;display:flex;gap:13px;align-items:center;font-size:13px;font-weight:700}.tool-tab .num{font-family:var(--serif);font-weight:400;font-style:italic;color:var(--muted)}.tool-tab[aria-selected=true]{background:var(--ink);color:var(--paper)}.tool-tab[aria-selected=true] .num{color:var(--lime)}.tool-panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:33px;min-width:0}.tool-panel h2{font-size:32px}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:30px}.result-panel{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:26px;display:flex;flex-direction:column;justify-content:center;min-width:0}.result-panel .big-result{font-size:clamp(32px,4.5vw,58px);margin:5px 0 12px}.result-panel h3{font-size:14px;letter-spacing:0;line-height:1.5;margin:0}.result-panel 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