:root{--bg:#f7f7f4;--ink:#1d2027;--mut:#5b616b;--line:#d9dbd6;--acc:#2f5bd3;--accl:#e8eefc;--card:#fff;--fill:#222630}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--acc)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:9}
.wrap{max-width:960px;margin:0 auto;padding:0 14px}
.top{background:#fff;border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;height:52px}
.brand{font-weight:700;font-size:19px;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px;margin-right:auto}
.brand .bn span{color:var(--acc)}
.top nav{display:flex;gap:16px;white-space:nowrap}
.top nav a{color:var(--ink);text-decoration:none;font-size:16px}
.top nav a[aria-current]{color:var(--acc);font-weight:600}
main{padding:14px 0 40px}
h1{font-size:26px;line-height:1.2;margin:6px 0 4px}
h2{font-size:22px;margin:28px 0 8px}
h3{font-size:18px;margin:18px 0 4px}
.lead{color:var(--mut);margin:0 0 12px}
.prose{max-width:720px}
/* game */
.game{--max:38px;--cell:clamp(14px,calc((min(100vw,940px) - 30px)/(var(--n) + var(--rc)*.8)),var(--max));--clue:calc(var(--cell)*.8);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px}
.ghead{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;margin-bottom:8px}
.gtitle{font-size:19px;margin:0}
.gmeta{color:var(--mut);font-size:15px}
.tools{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.btn,.sw{font:inherit;font-size:16px;min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;gap:6px;text-decoration:none}
.btn:hover,.sw:hover{border-color:#aab}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#fff}
.palette{display:flex;gap:6px}
.sw span{display:inline-block;width:20px;height:20px;border-radius:4px;background:var(--sw);color:var(--ink);font-size:14px;line-height:20px;text-align:center}
.sw.x span{background:none;border:1px solid var(--line)}
.sw[aria-pressed=true]{border:2px solid var(--acc);background:var(--accl)}
.sep{flex:1}
.boardwrap{overflow-x:auto;min-height:calc(var(--cc)*var(--clue) + var(--rows)*var(--cell) + 4px);display:flex;justify-content:center}
.board{display:grid;user-select:none;-webkit-user-select:none;width:max-content;outline:none}
.board .cell{width:var(--cell);height:var(--cell);border-right:1px solid #c9ccd2;border-bottom:1px solid #c9ccd2;background:#fff;touch-action:none;cursor:pointer;position:relative}
.board .cell.br{border-right:2px solid #6b707a}.board .cell.bb{border-bottom:2px solid #6b707a}
.board .cell.f{background:var(--fill)}
.board .cell.x::after{content:"";position:absolute;inset:22%;background:linear-gradient(45deg,transparent 44%,#8a909a 44%,#8a909a 56%,transparent 56%),linear-gradient(-45deg,transparent 44%,#8a909a 44%,#8a909a 56%,transparent 56%)}
.board .cell.bad{box-shadow:inset 0 0 0 3px #d43c3c}
.board .cell.hint{box-shadow:inset 0 0 0 3px var(--acc)}
.board .cell.kf{outline:3px solid var(--acc);outline-offset:-3px;z-index:1}
.board .rc,.board .cc{display:flex;gap:1px;color:var(--ink);font-weight:600;font-size:calc(var(--cell)*.56);line-height:1}
.board .rc{justify-content:flex-end;align-items:center;padding-right:5px;border-bottom:1px solid #c9ccd2;border-right:2px solid #6b707a}
.board .cc{flex-direction:column;justify-content:flex-end;align-items:center;padding-bottom:4px;border-right:1px solid #c9ccd2;border-bottom:2px solid #6b707a}
.board .rc.b5{border-bottom:2px solid #6b707a}.board .cc.b5{border-right:2px solid #6b707a}
.board .rc .n{min-width:calc(var(--clue)*.9);text-align:center}
.board .cc .n{min-height:calc(var(--clue)*.95);display:flex;align-items:center}
.board .n.col{color:#fff;border-radius:3px;justify-content:center;min-width:calc(var(--clue)*.9);text-shadow:0 0 2px #0006}
.board .ok{color:#9aa0a8}.board .hl{background:var(--accl)}
.board .corner{border-right:2px solid #6b707a;border-bottom:2px solid #6b707a}
.board .cc:first-of-type{border-left:0}
.status{min-height:3.2em;margin:10px 0 0;font-size:16px;color:var(--mut)}
.won .status{color:#1c7a3e;font-weight:600}
.won .board .cell.x::after{display:none}
.won .board .cell:not(.f){background:#fff}
.help{font-size:16px;color:var(--mut);margin:12px 2px 0}
.more{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.more a{padding:10px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;text-decoration:none;color:var(--ink);font-size:16px}
.more a:hover{border-color:var(--acc)}
.plist{list-style:none;padding:0;margin:8px 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.plist a{display:block;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;text-decoration:none;color:var(--ink);font-size:16px}
.plist a small{display:block;color:var(--mut);font-size:14px}
.plist a.done::after{content:" ✓";color:#1c7a3e;font-weight:700}
.plist a.cur{border:2px solid var(--acc)}
.filters{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0}
.filters select{font:inherit;font-size:16px;min-height:44px;border:1px solid var(--line);border-radius:10px;padding:0 10px;background:#fff}
table{border-collapse:collapse}th,td{text-align:left;padding:6px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.pdfs td a{white-space:nowrap}
/* maker */
.mboard{min-height:calc(var(--rows,var(--n))*var(--cell) + 1px);min-width:calc(var(--n)*var(--cell) + 1px);display:grid;width:max-content;margin:0 auto;--cell:clamp(12px,calc((min(100vw,900px) - 40px)/var(--n)),34px);border-left:1px solid #c9ccd2;border-top:1px solid #c9ccd2}
.mboard .cell{width:var(--cell);height:var(--cell);border-right:1px solid #c9ccd2;border-bottom:1px solid #c9ccd2;background:#fff;touch-action:none;cursor:pointer}
.mboard .cell.br{border-right:2px solid #6b707a}.mboard .cell.bb{border-bottom:2px solid #6b707a}
.mboard .cell.f{background:var(--fill)}.mboard .cell.bad{box-shadow:inset 0 0 0 3px #d43c3c}
.mrow{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:0 0 12px}
.mrow label{font-size:16px}
.mrow input[type=file]{font-size:15px;max-width:100%}
.out input{width:100%;font:inherit;font-size:15px;padding:10px;border:1px solid var(--line);border-radius:10px}
/* projector */
.game.proj{position:fixed;inset:0;z-index:50;border-radius:0;border:0;overflow:auto;--max:90px;--cell:max(14px,min(calc((100vw - 40px)/(var(--n) + var(--rc)*.8)),calc((100vh - 170px)/(var(--rows) + var(--cc)*.8))));background:#fff}
.game.proj .board .cell{border-color:#000}.game.proj .board .rc,.game.proj .board .cc{color:#000;font-weight:800}
.game.proj .board .cell.f{background:#000}
.game.proj .status{font-size:22px;color:#000}
body.projon{overflow:hidden}
.game .projonly{display:none}.game.proj .projonly{display:inline-flex}
/* footer */
footer{border-top:1px solid var(--line);background:#fff;padding:24px 0 90px;font-size:15px;color:var(--mut)}
footer ul{list-style:none;padding:0;margin:0 0 12px;display:flex;flex-wrap:wrap;gap:6px 18px}
footer a{color:var(--ink)}
.cookie{position:fixed;left:12px;right:12px;bottom:12px;max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 14px;display:flex;gap:12px;align-items:center;box-shadow:0 4px 18px #0002;z-index:40}
.cookie[hidden]{display:none}.cookie p{margin:0;font-size:15px}
.btn.sm{min-height:40px}
@media(max-width:600px){h1{font-size:23px}.top nav{gap:12px}.top nav a{font-size:15px}.game{padding:8px;border-radius:10px;--cell:clamp(14px,calc((100vw - 46px)/(var(--n) + var(--rc)*.8)),var(--max))}.btn,.sw{padding:0 10px;font-size:15px}}
@media print{.top,footer,.cookie,.tools,.more,.help{display:none}.game{border:0}}