:root{--paper:#f5efe5;--ink:#34231b;--green:#75482e;--muted:#796454;--line:#d8c7b5;--gold:#e7b774;--dark:#39271f}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,Segoe UI,sans-serif}a{color:var(--green);text-underline-offset:4px}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #b68024;outline-offset:4px}.skip{position:absolute;top:-100px;background:white;padding:10px;z-index:5}.skip:focus{top:0}.wrap{max-width:1240px;margin:auto;padding:0 32px}.mast{border-top:5px solid var(--green);background:#fffaf1}.mast-inner{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:22px;padding-bottom:20px}.brand{text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:12px}.mark{font:46px Georgia,serif;line-height:1;color:var(--green)}.brand strong{font:700 24px Georgia,serif;letter-spacing:-.5px}.brand small{display:block;font-size:11px;text-transform:uppercase;letter-spacing:2.2px}.edition{font:12px/1.6 monospace;text-transform:uppercase;letter-spacing:1px;text-align:right;color:var(--muted)}nav{border-block:1px solid var(--line)}.navrow{display:flex;gap:30px;flex-wrap:wrap}nav a{text-decoration:none;color:var(--ink);padding:13px 0;border-bottom:3px solid transparent;font-size:14px}nav a[aria-current=page]{border-color:var(--green);font-weight:700}.page{display:none;padding-top:32px;padding-bottom:56px}.page.active{display:block}.eyebrow{font-size:12px;letter-spacing:2px;font-weight:700;text-transform:uppercase;color:var(--green);margin:0 0 8px}h1,h2,h3{font-family:Georgia,serif;line-height:1.15}h1{font-size:clamp(32px,4vw,48px);font-weight:400;letter-spacing:-1.4px;margin:0 0 12px}h2{font-size:29px;font-weight:400;margin:0 0 14px}h3{font-size:22px;margin:0 0 12px}.intro{color:var(--muted);max-width:760px;margin:0 0 26px;font-size:17px}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}.console{background:var(--dark);color:#eef0e7;padding:22px;border-radius:5px;box-shadow:0 8px 22px #10272318}.console-top{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:17px;font:12px/1.4 monospace;letter-spacing:1.4px;text-transform:uppercase;color:#e3cdb4}.badge{border:1px solid #94765d;padding:5px 8px;border-radius:2px;font-size:11px;white-space:nowrap}.board-layout{display:grid;grid-template-columns:minmax(220px,1fr) 185px;gap:22px}.board-frame{position:relative;padding:0 0 23px 21px;max-width:450px;width:100%;margin:auto}.board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;width:100%;border:3px solid #b98c63;overflow:hidden}.square{display:flex;align-items:center;justify-content:center;background:#eed9b6;position:relative;aspect-ratio:1;min-width:0;line-height:1}.square.dark{background:#a6744f}.piece{font-family:'DejaVu Sans','Segoe UI Symbol','Arial Unicode MS',serif;font-size:clamp(22px,3.6vw,48px);color:#352018;line-height:1}.piece.white{color:#fff5dc;text-shadow:1px 1px #4b2d1c,-1px -1px #4b2d1c,1px -1px #4b2d1c,-1px 1px #4b2d1c}.square.last{box-shadow:inset 0 0 0 4px #e3bc60}.files{position:absolute;bottom:0;left:21px;right:0;display:grid;grid-template-columns:repeat(8,1fr);text-align:center;font:12px monospace;color:#e3cdb4}.ranks{position:absolute;top:0;bottom:23px;left:0;display:grid;grid-template-rows:repeat(8,1fr);align-items:center;font:12px monospace;color:#e3cdb4}.board-notes{border-left:1px solid #795b46;padding-left:18px}.board-notes h3{font:12px/1.5 monospace;letter-spacing:1px;text-transform:uppercase;color:#e3cdb4}.player{padding:13px 0;border-bottom:1px solid #795b46}.player strong{display:block;font-size:15px}.player span{font-size:12px;color:#e3cdb4}.moves{font:14px/2 monospace;margin:20px 0}.console-foot{margin-top:18px;border-top:1px solid #795b46;padding-top:16px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}.btn{border:1px solid #bfc7b8;background:transparent;color:inherit;border-radius:3px;padding:8px 13px;font-size:14px;text-decoration:none;display:inline-block}.btn.primary{background:var(--gold);border-color:var(--gold);color:#34231b;font-weight:650}.btn.light{background:var(--green);color:white;border-color:var(--green)}.console-status{font-size:12px;color:#e3cdb4;margin:12px 0 0}.adlabel{text-transform:uppercase;font:10px/1.6 monospace;letter-spacing:1.6px;color:var(--muted);margin:0 0 6px}.ad{width:320px;max-width:100%;height:50px;border:1px dashed #b99b7b;display:flex;align-items:center;justify-content:center;background:#eadfce;color:#79604c;font:12px monospace;margin-bottom:24px}.sidecard{border-top:2px solid var(--green);padding-top:18px}.sidecard p{font-size:14px;color:var(--muted)}.tabs{display:flex;gap:4px;margin:15px 0 18px;border-bottom:1px solid var(--line)}.tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:8px 9px;font-size:13px;color:var(--muted)}.tabs button[aria-pressed=true]{color:var(--green);border-color:var(--green);font-weight:700}.think{font-size:14px;min-height:165px}.think strong{color:var(--ink)}.candidate{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:8px 0;font:14px monospace}.candidate.best{font-weight:bold;color:var(--green)}.note{font-size:12px!important;line-height:1.6;color:var(--muted)}.rule{border-top:1px solid var(--line);margin-top:34px;padding-top:24px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.card{display:block;color:var(--ink);text-decoration:none;border-top:1px solid var(--line);padding-top:20px}.card:hover h3{text-decoration:underline;text-underline-offset:5px}.card .num{font:12px monospace;color:var(--green);margin-bottom:12px;display:block}.card p{color:var(--muted);font-size:14px;margin:0}.card .link{display:block;margin-top:18px;font-size:13px;font-weight:650;color:var(--green)}.article-grid{display:grid;grid-template-columns:minmax(0,740px) 270px;gap:70px;margin-top:32px}.prose p{margin:0 0 22px}.prose h2{margin-top:32px}.pull{border-left:3px solid var(--gold);padding:12px 22px;font:24px/1.4 Georgia,serif;margin:28px 0;background:#ece0cd}.margin-note{border-top:2px solid var(--green);padding-top:18px;font-size:14px;color:var(--muted)}.margin-note h3{color:var(--ink)}.timeline{max-width:900px;margin-top:32px}.event{display:grid;grid-template-columns:110px 1fr;gap:30px;border-top:1px solid var(--line);padding:24px 0}.year{font:30px Georgia,serif;color:var(--green)}.event p{margin:8px 0;color:var(--muted)}.event h3{margin:0}.console-explain{padding:20px 0;min-height:285px}.branches{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0}.branch{padding:22px 10px;border:1px solid #648377;text-align:center;font:20px Georgia,serif}.branch small{display:block;font:12px/1.5 monospace;color:#e3cdb4;margin-top:10px}.branch.chosen{border-color:var(--gold);background:#60432b}.stage{font:14px monospace;color:var(--gold)}.level-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}.mini-board{display:grid;grid-template-columns:repeat(4,1fr);width:150px;aspect-ratio:1;transform:skewY(-12deg);border:3px solid #b98c63;box-shadow:10px 14px #071b1944}.mini-board span{background:#eed9b6;display:flex;align-items:center;justify-content:center;font:27px serif;color:#34231b}.mini-board span:nth-child(8n+2),.mini-board span:nth-child(8n+4),.mini-board span:nth-child(8n+5),.mini-board span:nth-child(8n+7){background:#a6744f}.levels{display:flex;justify-content:center;gap:24px;align-items:center;min-height:285px;flex-wrap:wrap;padding:30px 0}.levels .mini-board:nth-child(2){margin-top:40px}.levels .mini-board:nth-child(3){margin-top:80px}.source-list li{margin-bottom:20px}.source-list small{display:block;color:var(--muted)}footer{border-top:1px solid var(--line);padding:26px 0;background:#ece0cd;font-size:13px;color:var(--muted)}.footer-row{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}footer a{margin-left:20px}.draft-note{font:12px monospace;color:var(--muted);padding:16px 0;border-bottom:1px solid var(--line)}
@media(min-width:1400px){.piece{font-size:48px}}@media(max-width:1050px){.board-layout{grid-template-columns:1fr}.board-notes{display:none}.article-grid{gap:30px;grid-template-columns:1fr 240px}.piece{font-size:clamp(22px,5vw,47px)}}@media(max-width:760px){.wrap{padding-left:18px;padding-right:18px}.edition{display:none}.brand strong{font-size:22px}.navrow{gap:6px 22px}.workbench,.article-grid{grid-template-columns:1fr;gap:25px}.console{padding:16px}.cards{grid-template-columns:1fr;gap:24px}.piece{font-size:clamp(24px,7vw,48px)}.page{padding-top:24px}.ad{margin-bottom:20px}.sidecard{max-width:none}.think{min-height:100px}.article-grid{margin-top:18px}.event{grid-template-columns:80px 1fr;gap:18px}.year{font-size:24px}.levels{gap:17px}.mini-board{width:110px}.footer-row a{margin-left:0;margin-right:20px}.console-top{letter-spacing:.5px}.branches{gap:8px}.branch{font-size:18px;padding:20px 4px}}@media(prefers-reduced-motion:no-preference){button,a{transition:background-color .15s,color .15s}}

/* Wooden set palette and functional console components */
.page{display:block}.site-subnav{display:flex;gap:8px 22px;flex-wrap:wrap;padding:13px 0;border-bottom:1px solid var(--line);font-size:13px}.site-subnav a[aria-current="page"]{font-weight:750;color:var(--ink)}
.board-layout{grid-template-columns:minmax(240px,1fr) 160px}.board{border:5px solid #a17650;border-radius:2px;box-shadow:0 0 0 2px #513423,0 5px 16px #0003}.board .square{border:0;border-radius:0;padding:0;cursor:pointer;width:100%;font:inherit}.board button.square:hover{filter:brightness(1.08)}.board .square.selected{box-shadow:inset 0 0 0 4px #fff2ad}.square.last{box-shadow:inset 0 0 0 3px #dfa955}.square.legal:after{content:"";position:absolute;width:24%;height:24%;border-radius:50%;background:#2f1c18aa;pointer-events:none}.square.capture:after{width:85%;height:85%;background:none;border:4px solid #ffe4a4}.square.check{background:#b95840}.square:focus-visible{outline:3px solid #fff;outline-offset:-5px;z-index:2}.piece{font-size:clamp(26px,3.5vw,46px);pointer-events:none}.piece.white{text-shadow:1px 1px 0 #4b2d1c,-1px -1px 0 #4b2d1c,1px -1px 0 #4b2d1c,-1px 1px 0 #4b2d1c;filter:drop-shadow(1px 2px 1px #0005)}.piece.black{color:#3e2419;filter:drop-shadow(0 1px 0 #e8be8a)}
.console .note{color:#e3cdb4}.console a{color:#f5ce96}.console label{font-size:13px}.console select{background:#f8efde;color:#34231b;padding:7px;border-radius:3px;border:1px solid #b99b7b;max-width:100%}.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:12px}.status{padding:12px 0 0;color:#f4d7af;font-size:14px;min-height:38px}.moves-list{font:13px/1.85 monospace;max-height:225px;overflow:auto;margin-top:14px;scrollbar-width:thin}.moves-list div{display:grid;grid-template-columns:25px 1fr 1fr}.moves-list .recent{color:#ffda89;font-weight:700}.board-notes{min-width:0}.analysis-list{max-height:320px;overflow:auto}.candidate{font-size:13px;gap:8px}.candidate span{white-space:nowrap}.analysis-help{font-size:12px;color:var(--muted)}.breakdown{margin:0;padding:0;list-style:none}.breakdown li{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:6px 0}.progress{width:100%;accent-color:#75482e;height:8px}.ad{width:320px;height:50px;flex-shrink:0}.adlabel{font-size:11px}.callout{border-left:3px solid #ac7541;background:#eee0ca;padding:18px 22px;margin:25px 0}.callout p:last-child{margin-bottom:0}.prose{max-width:780px}.prose li{margin:8px 0}.prose h2:first-child{margin-top:0}.prose h3{margin-top:24px}.prose table{border-collapse:collapse;width:100%;font-size:14px;margin:22px 0}.prose th,.prose td{padding:10px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.table-scroll{overflow:auto}details{border-block:1px solid var(--line);padding:14px 0;margin:20px 0}summary{cursor:pointer;font-weight:650}.references{font-size:13px;border-top:1px solid var(--line);padding-top:18px;margin-top:30px}.references li{margin:8px 0}.reading-time{font:12px monospace;color:var(--muted);margin:12px 0 28px}.launch-note{background:#ead8b8;padding:10px 14px;border-radius:3px;font-size:13px;margin-bottom:22px}.promo-box{min-height:200px;display:grid;place-content:center;text-align:center;border:1px solid #957357;padding:28px;gap:10px}.promo-box .large-piece{font-size:54px;line-height:1}.feature-space{margin-top:32px}.match-results{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.match-results div{border:1px solid var(--line);padding:10px 3px;text-align:center;font-size:13px}.match-results strong{display:block}.replay-progress{width:100%;accent-color:#e7b774}.mini-board{background:#503522}.levels{perspective:800px}.levels.flat .mini-board{transform:none!important;margin-top:0!important}.level-label{font:12px monospace;text-align:center;color:#ead4b8;margin-top:12px}.levels .layer:nth-child(2){margin-top:40px}.levels .layer:nth-child(3){margin-top:80px}.promotion{background:var(--paper);color:var(--ink);border:2px solid var(--green);border-radius:6px;max-width:90%;padding:24px}.promotion::backdrop{background:#1a100dbb}.promotion button{font-size:20px}.error{color:#9b271c}noscript{display:block;padding:15px;background:#f8d6bd}.narrow{max-width:780px}.console-top .badge{white-space:normal}.reference-note{font-size:13px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
@media(max-width:1100px){.board-layout{grid-template-columns:1fr}.board-notes{display:none}.piece{font-size:clamp(24px,5.2vw,48px)}}@media(max-width:760px){.piece{font-size:clamp(24px,8vw,48px)}.ad{max-width:100%}.site-subnav{gap:8px 15px}.console-top{flex-wrap:wrap}.console{padding:15px}.match-results{grid-template-columns:repeat(3,1fr)}.levels{gap:18px}.mini-board{width:100px}.console-foot .btn{padding:8px 10px}.workbench{gap:26px}.board-layout{grid-template-columns:minmax(0,1fr)}.intro{font-size:16px}.article-grid{grid-template-columns:1fr}.levels .layer:nth-child(3){margin-top:15px}}@media(max-width:360px){.mini-board{width:85px}.console{padding:12px}.wrap{padding-inline:12px}.tabs button{padding:8px}.piece{font-size:8vw}}