@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{--ink:#09090b;--panel:#17171b;--panel2:#222228;--line:#3b3b44;--text:#f7f7f8;--muted:#b9bbc8;--lime:#bef264;--pink:#ff2bd6;--cyan:#67e8f9;--yellow:#fde047;--radius:26px;--shadow:6px 6px 0 #000;--header:112px;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:130px}body{margin:0;background:var(--ink);color:var(--text);font-family:'Space Grotesk',Arial,sans-serif;font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}body.menu-open{overflow:hidden}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button:disabled{opacity:.5;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--cyan);outline-offset:5px}button,a{touch-action:manipulation}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;top:-100px;left:12px;background:var(--lime);color:#000;padding:12px 22px;z-index:1000;font-weight:700}.skip:focus{top:10px}.wrap{width:min(1280px,calc(100% - 64px));margin-inline:auto}.narrow{max-width:850px}.site-head{position:sticky;top:0;z-index:90;padding:12px 0;background:rgba(9,9,11,.96);border-bottom:1px solid #303038;backdrop-filter:blur(18px)}.head-inner{display:flex;align-items:center;justify-content:space-between;gap:26px}.brand{width:305px;flex-shrink:0}.brand img{width:100%;max-height:86px;object-fit:contain}.desktop-nav{display:flex;align-items:center;gap:7px}.nav-direct,.nav-group>summary{font-size:13px;line-height:1.3;font-weight:700;padding:13px 11px;border-radius:50px;white-space:nowrap;list-style:none;cursor:pointer}.nav-group>summary::-webkit-details-marker{display:none}.nav-group>summary:after{content:'⌄';margin-left:7px;color:var(--lime)}.nav-group[open]>summary,.nav-direct:hover,.nav-group>summary:hover{background:#303036}.nav-group{position:relative}.dropdown{position:absolute;top:calc(100% + 16px);left:0;width:310px;background:var(--panel);border:1px solid #53535c;border-radius:20px;padding:14px;box-shadow:8px 12px 0 #000;max-height:70vh;overflow:auto}.nav-group:last-of-type .dropdown{left:auto;right:0}.dropdown p{font-size:11px;text-transform:uppercase;letter-spacing:.13em;color:var(--lime);padding:7px 10px;margin:0}.dropdown a{display:block;padding:9px 10px;border-radius:9px;font-size:13px;line-height:1.45}.dropdown a:hover{background:#303038;color:var(--lime)}.nav-contact{background:var(--lime);color:#09090b;padding:13px 17px;border-radius:30px;font-weight:700;font-size:13px}.menu-toggle{display:none;background:var(--lime);color:#000;border:0;border-radius:40px;padding:12px 20px;font-weight:700;min-height:46px}.mobile-nav{position:fixed;inset:105px 0 0;background:var(--ink);overflow:auto;padding:16px 28px 80px;z-index:89}.mobile-nav details{border-bottom:1px solid var(--line)}.mobile-nav summary{padding:18px 0;font-weight:700;font-size:19px;cursor:pointer}.mobile-nav a{display:block;padding:10px 8px;color:var(--muted);min-height:44px}.mobile-nav>a{color:#fff;font-weight:700}.mobile-nav a:hover{color:var(--lime)}
h1,h2,h3,h4,p{margin-top:0}h1,h2,.display{font-family:'Bebas Neue','Arial Narrow',Impact,sans-serif;font-weight:400;line-height:.98;letter-spacing:.008em}h1{font-size:clamp(48px,6vw,90px);margin-bottom:24px}h2{font-size:clamp(36px,4.4vw,62px);margin-bottom:22px}h3{font-size:23px;line-height:1.25;margin-bottom:12px;letter-spacing:-.03em}p{margin-bottom:20px}.eyebrow{display:flex;gap:9px;align-items:center;font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;line-height:1.6;color:var(--lime);margin-bottom:22px}.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:currentColor}.badge{display:inline-flex;align-items:center;gap:7px;padding:7px 12px;background:#2c2c32;border:1px solid #44444c;border-radius:30px;color:#eceef4;font-size:11px;font-weight:700;line-height:1.3}.badge.lime{background:var(--lime);border-color:var(--lime);color:#111}.muted{color:var(--muted)}.accent{color:var(--lime)}.lede{font-size:19px;line-height:1.65;color:#cfd0da;max-width:690px}.section{padding:80px 0}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:25px;margin-bottom:32px}.section-head h2{margin-bottom:10px}.section-head p{margin-bottom:0;max-width:680px;color:var(--muted)}.text-link{font-size:14px;font-weight:700;color:var(--lime);white-space:nowrap;padding:8px 0}.text-link:after{content:' ↗'}.buttons{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.btn{display:inline-flex;justify-content:center;align-items:center;gap:12px;min-height:50px;padding:13px 22px;border:2px solid var(--lime);background:var(--lime);color:#09090b;font-weight:700;font-size:14px;line-height:1.4;border-radius:50px;box-shadow:3px 3px 0 #000;transition:transform .15s}.btn:hover{transform:translateY(-3px)}.btn.secondary{border-color:#646471;background:transparent;color:#fff;box-shadow:none}.btn.pink{background:var(--pink);border-color:var(--pink);color:#000}.btn.small{min-height:42px;padding:9px 16px;font-size:12px}.hero{padding:52px 0 45px;position:relative;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.06fr 1fr;align-items:center;gap:45px}.hero h1{font-size:clamp(60px,7.3vw,106px);margin:0 0 25px;letter-spacing:-.012em}.hero h1 span{color:var(--lime)}.hero p{font-size:18px;max-width:565px;color:#caccd5;margin-bottom:26px}.hero-art{position:relative;border:1px solid #52535f;border-radius:34px;background:#12121a;overflow:hidden;aspect-ratio:1}.hero-art img{width:100%;height:100%;object-fit:cover}.hero-art canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:.44;mix-blend-mode:screen}.art-label{position:absolute;right:19px;bottom:22px;background:var(--lime);color:#000;border:2px solid #000;border-radius:99px;padding:9px 13px;font-size:10px;letter-spacing:.08em;font-weight:700;transform:rotate(-4deg)}.hero-note{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:25px;font-size:11px;color:#bcbec9}.hero-note strong{color:#fff}.feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:35px}.feature-stat{display:flex;align-items:center;justify-content:space-between;gap:20px;border:2px solid #000;border-radius:21px;box-shadow:4px 4px 0 #000;padding:20px 25px;color:#09090b}.feature-stat:nth-child(1){background:var(--lime)}.feature-stat:nth-child(2){background:var(--pink)}.feature-stat:nth-child(3){background:var(--cyan)}.feature-stat strong{font-size:36px;font-weight:700;line-height:1}.feature-stat span{font-size:13px;font-weight:700;line-height:1.35}.ribbon{display:flex;justify-content:center;flex-wrap:wrap;gap:22px;align-items:center;padding:14px 22px;background:var(--yellow);color:#09090b;border-block:2px solid #000;font-size:12px;font-weight:700;letter-spacing:.08em}.ribbon span{white-space:nowrap}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.card{background:var(--panel);border:1px solid #404049;border-radius:var(--radius);overflow:hidden;min-width:0;transition:border-color .2s,transform .2s}.card:hover{border-color:#898994}.card-pad{padding:27px}.card h3 a:hover{color:var(--lime)}.card p{font-size:14px;color:#c3c5ce;margin-bottom:18px}.card-image{display:block;overflow:hidden;aspect-ratio:1.3}.card-image img{width:100%;height:100%;object-fit:cover;transition:transform .4s}.card:hover .card-image img{transform:scale(1.035)}.card .meta{font-size:11px;color:#c3c5ce;display:flex;gap:10px;flex-wrap:wrap;margin:0 0 15px}.card .category{color:var(--lime);font-weight:700}.icon-tile{display:grid;place-items:center;width:55px;height:55px;font-size:29px;border-radius:17px;background:#303139;margin-bottom:28px}.color-card{border:2px solid #000;box-shadow:var(--shadow);color:#09090b;position:relative;padding:30px;border-radius:26px;display:flex;flex-direction:column;align-items:flex-start;min-height:250px}.color-card:nth-child(4n+1){background:var(--lime)}.color-card:nth-child(4n+2){background:var(--cyan)}.color-card:nth-child(4n+3){background:var(--pink)}.color-card:nth-child(4n){background:var(--yellow)}.color-card p{color:#20222b;font-size:14px}.color-card h3{font-size:26px}.color-card .icon-tile{background:rgba(0,0,0,.09);margin-bottom:22px}.color-card .arrow{font-size:23px;font-weight:700;margin-top:auto}.color-card:hover{transform:translateY(-4px)}.tabs{display:flex;gap:9px;flex-wrap:wrap;margin:24px 0}.tabs a,.filter-pill{border:1px solid #484852;border-radius:40px;padding:9px 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#474751;background:#22222a;color:var(--cyan);text-decoration:none}.sources{border-top:1px solid #42424c;margin-top:40px;padding-top:18px}.sources h2{font-size:21px}.sources ul{padding-left:19px}.sources li{font-size:13px;margin-bottom:8px}.term-hero{display:grid;grid-template-columns:1.1fr .8fr;gap:45px;align-items:center}.term-hero img{width:100%;border-radius:28px;border:1px solid #535361;max-height:470px;object-fit:cover}.term-hero .lede{font-size:20px}.topic-label{color:var(--cyan);font-weight:700;font-size:12px}.entry-neighbors{display:flex;justify-content:space-between;gap:20px;padding-top:30px;border-top:1px solid #40404a;margin-top:40px;font-size:13px}.entry-neighbors a{max-width:47%;overflow-wrap:anywhere}.tool-panel{border:1px solid #4d4d5a;background:var(--panel);border-radius:25px;padding:29px}.tool-panel h2{font-family:inherit;font-size:25px;font-weight:700;letter-spacing:-.03em}.output{padding:23px;border-radius:17px;background:#242b21;border:1px solid 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#111}.square.chosen{box-shadow:inset 0 0 0 4px #ff2bd6}.square.legal:after{content:'';width:16px;height:16px;border-radius:50%;position:absolute;background:rgba(0,0,0,.35);pointer-events:none}.square.highlight{background:#d2f097}.board-status{font-size:13px;min-height:28px;color:var(--lime);margin:12px 0}.board-help{font-size:12px;color:#b7bac8}.board-notice{padding:15px;border:1px solid #66533f;border-radius:13px;font-size:12px;background:#30261c;color:#f3d7b3;margin:16px 0}.email-display{font-size:clamp(22px,4vw,42px);font-weight:700;word-break:break-word;color:var(--lime);margin:30px 0}.index-list{columns:3;column-gap:40px;padding:0;list-style:none}.index-list li{break-inside:avoid;margin-bottom:13px;font-size:14px}.index-list a{color:#d6d9e3}.index-list a:hover{color:var(--lime)}.notice-line{font-size:11px;color:#afb2c0;margin-top:19px}.progress-bar{position:fixed;top:0;left:0;height:3px;background:var(--pink);width:0;z-index:100;pointer-events:none}.read-progress{position:absolute;height:0}.site-footer{border-top:1px solid #40404b;background:#121215;padding:60px 0 25px;margin-top:75px}.footer-top{display:flex;justify-content:space-between;gap:30px;align-items:center;margin-bottom:40px}.footer-brand{max-width:370px}.footer-brand img{width:320px;margin-bottom:12px}.footer-brand p{font-size:12px;color:#abadbb;margin:0}.footer-tagline{font-family:'Bebas Neue',Impact,sans-serif;font-size:38px;line-height:1.05;color:var(--lime);text-align:right}.footer-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:28px}.footer-col h2{font-family:inherit;font-size:11px;line-height:1.6;letter-spacing:.09em;color:var(--lime);text-transform:uppercase;font-weight:700;margin:0 0 18px}.footer-col a{display:block;font-size:11px;color:#b9bbca;padding:5px 0;line-height:1.7;overflow-wrap:anywhere}.footer-col a:hover{color:#fff}.footer-bottom{margin-top:40px;padding-top:23px;border-top:1px solid #33333c;display:flex;justify-content:space-between;align-items:flex-start;gap:25px;font-size:10px;color:#979aa9}.footer-bottom p{margin:0;max-width:730px}.footer-legal{display:flex;gap:14px;flex-wrap:wrap}.back-top{position:fixed;right:18px;bottom:18px;background:var(--lime);color:#000;width:43px;height:43px;border:2px solid #000;border-radius:50%;display:grid;place-items:center;z-index:30;box-shadow:2px 2px 0 #000;font-size:22px}
@media(min-width:1500px){.hero h1{font-size:114px}}@media(max-width:1180px){.desktop-nav{gap:1px}.nav-direct,.nav-group>summary{font-size:12px;padding:12px 7px}.brand{width:250px}.head-inner{gap:16px}.nav-contact{padding:12px}.term-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-grid{gap:24px}.hero h1{font-size:86px}}
@media(max-width:1000px){.desktop-nav{display:none}.menu-toggle{display:block}.brand{width:300px}.site-head{padding:10px 0}.brand img{height:76px}.hero h1{font-size:75px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.page-grid{grid-template-columns:minmax(0,1fr) 240px;gap:27px}.ai-panel{padding:35px;gap:30px}.term-hero{gap:28px}.prose h2{font-size:26px}.board-layout{grid-template-columns:minmax(0,1fr)}.square{font-size:45px}.board-layout .chess-board{max-width:560px}}
@media(max-width:760px){html{scroll-padding-top:105px}.wrap{width:calc(100% - 34px)}.brand{width:245px}.brand img{height:62px}.menu-toggle{padding:10px 17px;font-size:12px}.mobile-nav{top:83px}.hero{padding:31px 0}.hero-grid{grid-template-columns:minmax(0,1fr);gap:28px}.hero h1{font-size:clamp(66px,12vw,88px);max-width:560px}.hero p{font-size:16px}.hero-art{max-width:530px;justify-self:center;width:100%}.feature-strip{gap:9px;margin-top:23px}.feature-stat{padding:15px 12px;flex-direction:column;align-items:flex-start;gap:7px;border-radius:17px}.feature-stat strong{font-size:28px}.feature-stat span{font-size:10px}.section{padding:49px 0}.section-head{align-items:flex-start;flex-direction:column;gap:12px}.section-head .text-link{align-self:flex-start}.grid-3{gap:17px}.card-pad{padding:21px}.card h3{font-size:20px}.grid-2{gap:19px}.color-card{padding:24px;min-height:245px}.color-card h3{font-size:22px}.ai-panel{grid-template-columns:minmax(0,1fr);padding:29px;gap:27px}.ai-panel h2{font-size:54px}.term-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.cta{padding:27px;flex-direction:column;align-items:flex-start}.cta h2{font-size:40px}.page-grid{grid-template-columns:minmax(0,1fr)}.sidebar{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.side-box{margin:0}.page-top{padding-bottom:30px}.page-top h1{font-size:58px}.lede{font-size:17px}.term-hero{grid-template-columns:minmax(0,1fr)}.term-hero img{max-width:470px;justify-self:center}.term-hero .lede{font-size:17px}.footer-top{align-items:flex-start}.footer-tagline{font-size:29px}.footer-grid{gap:20px}.footer-bottom{flex-direction:column}.index-list{columns:2}.prose figure img{max-height:500px}.filter-bar .field{min-width:145px}.ribbon{font-size:10px;gap:15px}.ribbon span:nth-child(n+4){display:none}.footer-brand{max-width:280px}.footer-brand img{max-width:100%}.tool-panel{padding:23px}.faq summary{font-size:16px}.prose p,.prose li{font-size:15px;line-height:1.9}}
@media(max-width:430px){.brand{width:220px}.head-inner{gap:10px}.menu-toggle{padding:10px 13px}.grid-3,.grid-2{grid-template-columns:minmax(0,1fr)}.grid-4{gap:12px}.color-card{padding:20px;min-height:270px}.color-card h3{font-size:19px}.color-card p{font-size:12px}.color-card .icon-tile{width:43px;height:43px;font-size:24px}.term-card .card-pad{padding:15px}.term-card h3{font-size:17px}.term-card p{font-size:11px}.term-card .meta{font-size:10px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.footer-top{flex-direction:column}.footer-tagline{text-align:left}.sidebar{grid-template-columns:minmax(0,1fr)}.feature-stat strong{font-size:25px}.feature-stat span{font-size:9px}.hero h1{font-size:64px}.page-top h1{font-size:48px}.hero .buttons .btn{font-size:12px;padding:12px 17px}.hero .eyebrow{font-size:9px}.square{font-size:33px}.filter-bar{gap:10px}.table-shell td,.table-shell th{padding:14px 15px}.index-list{columns:1}.tool-panel .grid-2{gap:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.hero-art canvas{display:none}}
/* Assembly refinements and progressive-enhancement states. */
.mt-5{margin-top:1.25rem}.mt-6{margin-top:1.5rem}.mt-10{margin-top:2.5rem}.mt-12{margin-top:3rem}.section-lined{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.article-section{padding-top:34px}.search-field{max-width:560px}.search-results{display:grid;gap:18px}.search-result{margin:0}.search-result h2{margin-top:18px;font-size:23px}.search-result h2 a{font-size:inherit;color:var(--text);border:0;line-height:1.3}.search-result p{font-size:14px;margin:0}.sitemap-section{margin-bottom:65px}.sitemap-section h2{font-size:40px}.move-log{min-height:75px;max-height:200px;overflow:auto;border:1px solid var(--line);border-radius:12px;padding:14px;font-size:13px;color:var(--cyan);overflow-wrap:anywhere}.prose>.sources:has(ul:empty){display:none}.alphabet-block{scroll-margin-top:145px}.hero-art canvas{position:absolute;inset:0;z-index:2;pointer-events:none;width:100%;height:100%;opacity:.85}.hero-art picture{display:block;width:100%;height:100%}.hero-art{isolation:isolate}.hero-art .art-label{z-index:3}.sources a,.source-note a{text-decoration:underline;text-underline-offset:3px}.prose img{max-width:100%}.article-body>p:first-child{font-size:18px;color:#eceef6}.field textarea{resize:vertical}.tool-panel .field input,.tool-panel .field select,.tool-panel .field textarea{max-width:100%;min-width:0}.board-layout>*{min-width:0}.square .coord{pointer-events:none;color:#10140d;text-shadow:none}.square.white-piece .coord{color:#10140d}.square .coord{font-weight:700}.square>span:first-child{pointer-events:none}.term-hero>picture{min-width:0}.term-hero picture img{width:100%}.player-card h3{overflow-wrap:anywhere}.player-cell a:hover{text-decoration:underline}.mobile-nav{overscroll-behavior:contain}.brand img{color:transparent}.term-grid{align-items:stretch}.term-card .card-pad{height:auto}.term-card .card-image{display:block}.breadcrumbs{overflow-wrap:anywhere}.tabs{max-width:100%}.footer-grid .footer-col h2{min-height:22px}
@media(max-width:600px){.article-section{padding-top:20px}.sitemap-section h2{font-size:32px}.square{font-size:clamp(23px,7vw,40px)}.board-layout .tool-panel{padding:16px}.board-layout .tool-controls{gap:8px}.board-layout .btn{font-size:12px;padding:11px 15px}.square .coord{font-size:8px}.filter-bar{align-items:stretch}.hero h1{overflow-wrap:normal}.page-top h1{overflow-wrap:anywhere}.site-head .wrap{width:calc(100% - 28px)}}
@media(max-width:359px){.brand{width:184px}.menu-toggle{padding:9px 11px}.hero h1{font-size:55px}.hero .eyebrow{letter-spacing:.07em}.grid-4{grid-template-columns:minmax(0,1fr)}.color-card{min-height:225px}}
/* Long headings remain readable at small widths, even without web fonts. */
h1,h2,.display{font-family:'Bebas Neue','DejaVu Sans Condensed','Arial Narrow',Impact,sans-serif;font-weight:700;letter-spacing:-.025em}.footer-col h2{overflow-wrap:anywhere}.ai-panel h2{font-size:clamp(29px,4.4vw,62px);overflow-wrap:anywhere}.ai-panel h2 em{font-style:normal;display:inline-block;max-width:100%;overflow-wrap:anywhere}.ribbon{overflow:hidden}.footer-tagline{overflow-wrap:anywhere;max-width:100%}
@media(min-width:761px){.hero h1{font-size:clamp(55px,5.3vw,80px);line-height:1.02;letter-spacing:-.045em}}
@media(max-width:430px){.ai-panel{padding:24px}.ai-panel h2{font-size:clamp(27px,7.4vw,32px);line-height:1.1}}
@media(max-width:359px){.hero h1{font-size:50px}}