/* 2pChess: starter layout from scripts/site-template. Colours come from site.json; ad slots have reserved heights */
:root{
  --bg:#f5f6f8; --surface:#ffffff; --ink:#14202f; --muted:#5d6878; --line:#e1e5eb; --soft:#eef1f5;
  --hero:#1d2a24; --hero2:#38443e; --hero-ink:#f4f6fa;
  --accent:#d9a441; --accent-ink:#ffffff; --cool:#2463c7; --adbg:#eceff3;
  --page-w:1080px;
  --display:"Manrope","Inter",ui-sans-serif,system-ui,sans-serif;
  --body:"Inter",ui-sans-serif,system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0b1422; --surface:#121e30; --ink:#e8edf4; --muted:#9aa6b8; --line:#23324a; --soft:#1a2840;
  --hero:#08111f; --hero2:#1d2a24; --cool:#7fb0ff; --adbg:#152238; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0b1422; --surface:#121e30; --ink:#e8edf4; --muted:#9aa6b8; --line:#23324a; --soft:#1a2840;
  --hero:#08111f; --hero2:#1d2a24; --cool:#7fb0ff; --adbg:#152238; color-scheme:dark}
:root[data-width="wide"]{--page-w:1340px}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.55 var(--body)}
a{color:var(--cool)}
h1,h2,h3,h4{font-family:var(--display);letter-spacing:-.02em;line-height:1.2}
.in{max-width:var(--page-w);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Masthead: the hero intro (.lede) stays on one line, no max-width */
.mast{background:radial-gradient(110% 150% at 90% 0%,var(--hero2) 0%,var(--hero) 60%);color:var(--hero-ink);padding-block:12px 64px}
.mast.slim{padding-block:12px 52px}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px}
.logo{font:800 20px/1 var(--display);color:inherit;text-decoration:none;letter-spacing:-.02em;display:flex;align-items:center;gap:9px;white-space:nowrap}
.logo svg{flex:none}
.tools{display:flex;align-items:center;gap:4px}
.tools nav{display:flex;gap:16px;font-size:14px;margin-right:10px}
.tools nav a{color:inherit;opacity:.75;text-decoration:none;white-space:nowrap}
.tools nav a:hover,.tools nav a[aria-current]{opacity:1}
.tools nav a[aria-current]{box-shadow:inset 0 -2px var(--accent)}
.tb-ico{display:grid;place-items:center;width:34px;height:34px;border-radius:8px;border:1px solid transparent;background:transparent;color:inherit;opacity:.8;cursor:pointer}
.tb-ico:hover{opacity:1;border-color:rgba(255,255,255,.3)}
.tb-ico.on{opacity:1;border-color:rgba(255,255,255,.45)}
.mast h1{font-size:clamp(26px,4vw,40px);font-weight:800;margin:8px 0 6px;text-wrap:balance}
.mast .lede{margin:0;opacity:.8;font-size:16px}
.mast .eyebrow{display:inline-flex;margin:26px 0 0;font:600 12px var(--body);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
@media (max-width:980px){.tools nav{display:none}}

main.in{display:grid;gap:20px;padding-block:0 48px;margin-top:-40px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px}
.guide h2{font-size:22px;margin:0 0 8px}
.guide h3{font-size:17px;margin:16px 0 4px}
.guide ul,.guide ol{padding-left:20px}
.guide p{margin:6px 0}
.page h1{font-size:28px;margin:0 0 10px}
.btn{font:600 15px var(--body);background:var(--accent);color:var(--accent-ink);border:0;border-radius:10px;padding:11px 20px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.tool{min-height:320px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;margin-top:10px}
.tiles a{display:grid;gap:2px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);background:var(--bg)}
.tiles a:hover{border-color:var(--accent)}
.tiles b{font-family:var(--display);font-size:15px}
.tiles span{font-size:13px;color:var(--muted)}
.ad{background:var(--adbg);border-radius:12px;display:grid;place-items:center;color:var(--muted);font-size:11px;letter-spacing:.08em;text-transform:uppercase}
.ad.leader{min-height:120px}
.disclaimer{font-size:13px;color:var(--muted);margin:0}
.guides{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13.5px;align-items:baseline}
.guides b{font-family:var(--display);margin-right:4px}
.guides a{color:var(--muted)}
footer{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}
footer a{color:var(--muted)}

/* ---------- Chess ---------- */
:root{--bl:#f0d9b5;--bd:#b58863;--lm:rgba(255,214,51,.5);--good:#2f8f4e;--bad:#c2412d}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent)}
.btn.wide{width:100%;justify-content:center}
.btn:disabled{opacity:.6;cursor:default}
.btn{color:#1d2a24}
.linkbtn{background:none;border:0;padding:0;color:var(--cool);font:inherit;font-size:13px;cursor:pointer;text-decoration:underline}
.game{display:grid;grid-template-columns:minmax(0,600px) minmax(260px,1fr);gap:22px;align-items:start;padding:16px}
@media (max-width:880px){.game{grid-template-columns:1fr;padding:10px}}
.bcol{display:grid;gap:6px;max-width:600px;width:100%;margin:0 auto}
.strip{display:flex;align-items:center;gap:10px;min-height:34px;font-size:14px}
.strip .who{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.strip.turn .who::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-right:6px;vertical-align:1px}
.strip .capt{display:flex;align-items:center;flex:1;min-width:0;overflow:hidden}
.strip .capt img{width:18px;height:18px;margin-right:-5px}
.strip .capt b{margin-left:9px;font-size:12px;color:var(--muted)}
.strip .clk{font:700 18px/1 var(--display);font-variant-numeric:tabular-nums;background:var(--soft);border-radius:8px;padding:7px 10px;min-width:72px;text-align:right}
.strip.turn .clk{background:var(--ink);color:var(--bg)}
.strip .clk.low{color:#fff;background:var(--bad)}
.board{position:relative;aspect-ratio:1;width:100%;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);border-radius:6px;overflow:hidden;user-select:none;-webkit-user-select:none;touch-action:none;box-shadow:0 2px 10px rgba(0,0,0,.18);background:var(--bd)}
.sq{position:relative;min-width:0;min-height:0}
.sq.l{background:var(--bl)}.sq.d{background:var(--bd)}
.sq.lm::before,.sq.sel::before{content:"";position:absolute;inset:0;background:var(--lm)}
.sq.sel::before{background:rgba(255,214,51,.65)}
.sq.hint::before{content:"";position:absolute;inset:0;background:rgba(36,99,199,.45)}
.sq.chk{background:radial-gradient(circle,#ff3b30 0%,rgba(231,0,0,.55) 35%,transparent 72%),var(--bl)}
.sq.d.chk{background:radial-gradient(circle,#ff3b30 0%,rgba(231,0,0,.55) 35%,transparent 72%),var(--bd)}
.sq.dot::after{content:"";position:absolute;left:35%;top:35%;width:30%;height:30%;border-radius:50%;background:rgba(20,30,20,.22);z-index:2}
.sq.cap::after{content:"";position:absolute;inset:0;border-radius:50%;box-shadow:inset 0 0 0 5px rgba(20,30,20,.25);z-index:2}
.pc{position:absolute;inset:0;width:100%;height:100%;z-index:1;pointer-events:none}
.dragpc{position:fixed;left:0;top:0;z-index:100;pointer-events:none;filter:drop-shadow(0 6px 8px rgba(0,0,0,.3))}
.cr,.cf{position:absolute;font:600 11px/1 var(--body);z-index:1;pointer-events:none}
.cr{left:3px;top:3px}.cf{right:3px;bottom:2px}
.sq.l .cr,.sq.l .cf{color:var(--bd)}.sq.d .cr,.sq.d .cf{color:var(--bl)}
.promo{position:absolute;inset:0;z-index:20;background:rgba(10,15,12,.72);display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;align-content:center;padding:10%}
.promo p{width:100%;text-align:center;color:#fff;margin:0 0 4px;font-weight:600}
.promo button{width:20%;aspect-ratio:1;border:0;border-radius:12px;background:var(--bl);cursor:pointer;padding:4px}
.promo button img{width:100%;height:100%}
.promo button.x{width:auto;aspect-ratio:auto;background:none;color:#fff;text-decoration:underline;width:100%}
.side{display:grid;gap:12px;align-content:start;min-width:0}
.side label{display:grid;gap:4px;font-size:13px;color:var(--muted)}
.side label.chk{display:flex;align-items:center;gap:6px;color:var(--ink);font-size:14px}
.side select,.join input{font:500 15px var(--body);padding:9px 10px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink)}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:end}
.row > label{flex:1;min-width:120px}
.side .row .btn{padding:10px 14px}
.tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--soft);border-radius:12px;padding:4px;gap:4px}
.tabs button{font:600 14px var(--body);border:0;border-radius:9px;padding:9px 8px;background:transparent;color:var(--muted);cursor:pointer}
.tabs button[aria-selected="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
[data-pane],[data-step]{display:grid;gap:12px}
[hidden]{display:none!important}
.or{text-align:center;color:var(--muted);font-size:13px;margin:0}
.join{display:flex;gap:8px}
.join input{flex:1;min-width:0;text-transform:uppercase;letter-spacing:.3em;font-weight:700;text-align:center}
.err{color:var(--bad);margin:0;font-size:14px}
.err:empty{display:none}
.small{font-size:13px;color:var(--muted);margin:0}
.code{font:800 44px/1 var(--display);letter-spacing:.18em;text-align:center;margin:0;color:var(--ink)}
.link{text-align:center;margin:0;font-size:14px;word-break:break-all}
.qr{width:150px;height:150px;margin:0 auto;background:#fff;border-radius:10px;padding:4px}
.qr svg{width:100%;height:100%;display:block}
.qr:empty{display:none}
.offer{background:var(--soft);border-radius:10px;padding:10px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:14px}
.status{margin:0;font-weight:600;font-size:15px;min-height:22px}
.status.done,.status[data-kind="good"]{color:var(--good)}
.status[data-kind="bad"]{color:var(--bad)}
.moves{list-style:none;margin:0;padding:6px 10px;max-height:210px;overflow:auto;background:var(--soft);border-radius:10px;font:500 14px/1.7 var(--body);font-variant-numeric:tabular-nums}
.moves li{display:grid;grid-template-columns:34px 1fr 1fr}
.moves li b{color:var(--muted);font-weight:500}
.moves li.empty{display:block;color:var(--muted)}
.lab{margin:0;font-size:13px;color:var(--muted)}
.levels{display:grid;grid-template-columns:repeat(8,1fr);gap:4px}
.levels.four{grid-template-columns:repeat(4,1fr)}
.levels button{font:700 15px var(--display);border:1px solid var(--line);border-radius:9px;padding:9px 0;background:var(--surface);color:var(--ink);cursor:pointer;display:grid;gap:1px}
.levels button small{font:500 11px var(--body);color:var(--muted)}
.levels button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#1d2a24}
.levels button[aria-pressed="true"] small{color:#1d2a24}
.pstats{display:flex;flex-wrap:wrap;gap:6px 14px;margin:0;font-size:14px}
.steps{padding-left:22px}.steps li{margin:6px 0}
.split{display:grid;grid-template-columns:minmax(0,340px) 1fr;gap:24px;align-items:start}
@media (max-width:760px){.split{grid-template-columns:1fr}}
.diag{margin:0}
.diag .board{box-shadow:none;max-width:340px}
.diag figcaption{font-size:13px;color:var(--muted);margin-top:6px}
.board.static .sq.sel::before{background:rgba(255,214,51,.65)}
.piece h2{display:flex;align-items:center;gap:8px}
.val{font:600 13px var(--body);color:var(--muted);background:var(--soft);border-radius:20px;padding:3px 10px}
.tbl{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0}
.tbl th,.tbl td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl th{color:var(--muted);font-weight:600;font-size:13px}
.mast{padding-block:12px 56px}
@media (max-width:600px){.mast{padding-block:8px 50px}.mast h1{font-size:26px;margin:4px 0}.mast .eyebrow{margin-top:12px}.mast .lede{font-size:14px}}

/* Board colours (data-board on <html>, saved in localStorage 2pc:board); brown is the default */
:root[data-board="walnut"]{--bl:#e3c16f;--bd:#8b5a2b}
:root[data-board="maple"]{--bl:#f6e7c8;--bd:#d0a26a}
:root[data-board="green"]{--bl:#ebecd0;--bd:#779556}
:root[data-board="blue"]{--bl:#dee3e6;--bd:#8ca2ad}
:root[data-board="grey"]{--bl:#e4e4e4;--bd:#9b9b9b}
.prefs{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.swatches{display:flex;gap:6px;flex:1}
.sw{width:28px;height:28px;border-radius:7px;border:2px solid var(--line);cursor:pointer;padding:0;background:linear-gradient(135deg,var(--a) 0 50%,var(--b) 50% 100%)}
.sw[aria-pressed="true"]{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent)}
.sw-brown{--a:#f0d9b5;--b:#b58863}.sw-walnut{--a:#e3c16f;--b:#8b5a2b}.sw-maple{--a:#f6e7c8;--b:#d0a26a}
.sw-green{--a:#ebecd0;--b:#779556}.sw-blue{--a:#dee3e6;--b:#8ca2ad}.sw-grey{--a:#e4e4e4;--b:#9b9b9b}