:root{font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#233d36;background:#f5f4ee;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,select{font:inherit;color:inherit}button{cursor:pointer;touch-action:manipulation;border:0;background:none;border-radius:12px}button:focus-visible,select:focus-visible{outline:3px solid #bd8c45;outline-offset:3px}main{max-width:1120px;margin:auto;padding:38px 48px}header{display:flex;align-items:center;justify-content:space-between;padding-bottom:32px;border-bottom:1px solid #dcded4}.brand{font-size:30px;text-decoration:none;color:inherit;letter-spacing:-1px}.tag,.eyebrow{font-size:11px;letter-spacing:2px;font-weight:650}.tag{color:#7b857b}.intro{display:flex;justify-content:space-between;align-items:center;margin:40px 0 34px}h1{font-family:Georgia,serif;font-weight:400;font-size:44px;letter-spacing:-1.5px;margin:12px 0}p{line-height:1.6}.intro p:last-child{color:#7b857b;margin:0}.primary{background:#294d40;color:white;padding:15px 24px}.primary span{margin-left:24px}.game{display:grid;grid-template-columns:minmax(0,560px) 1fr;gap:64px}.status{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-size:13px}.status label{color:#7b857b}select{border:0;background:transparent;font-weight:600;padding:10px}.status button{padding:10px;background:#eaece3;font-variant-numeric:tabular-nums}#board{display:grid;grid-template-columns:repeat(9,1fr);border:2px solid #42594c;border-radius:4px;overflow:hidden;background:white}.cell{aspect-ratio:1;min-width:0;padding:0;border-radius:0;border-right:1px solid #d9dfd5;border-bottom:1px solid #d9dfd5;font-size:28px;font-weight:400;color:#477965;position:relative}.cell:nth-child(3n){border-right:2px solid #42594c}.cell:nth-child(9n){border-right:0}.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid #42594c}.cell:nth-child(n+73){border-bottom:0}.cell.fixed{color:#253f35;font-weight:600}.cell.related{background:#f0f3eb}.cell.same{background:#dce8d8}.cell.selected{background:#c7dcc2;box-shadow:inset 0 0 0 2px #52764f}.cell.error{color:#b45144;background:#fbe9e3}.pencil{display:grid;grid-template-columns:repeat(3,1fr);font-size:11px;line-height:1.4;padding:4px;color:#67816e}.board-wrap{position:relative}#overlay{position:absolute;inset:0;background:#f5f4eef5;display:flex;align-items:center;justify-content:center;flex-direction:column}#overlay[hidden]{display:none}.progress{display:flex;justify-content:space-between;font-size:11px;color:#7b857b;margin-top:16px}aside{padding-top:40px}h2{font-family:Georgia,serif;font-size:30px;font-weight:400;margin:12px 0}.muted{color:#7b857b;font-size:14px}#numbers{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:28px}#numbers button{background:#e8ecdf;font-size:28px;min-height:65px}#numbers button:hover{background:#d8e2ce}.actions{display:grid;grid-template-columns:repeat(4,1fr);margin-top:24px;gap:4px}.actions button{font-size:25px;padding:10px 0}.actions span{display:block;font-size:10px;margin-top:7px}.actions button[aria-pressed=true]{background:#d8e2ce}#message{font-size:12px;min-height:40px;color:#6b786b}.how{border-top:1px solid #dcded4;margin-top:24px;padding-top:24px}.how>span{float:left;font-size:32px;margin-right:15px;color:#8c9979}.how h3{font-size:14px;font-weight:600;margin:0}.how p{font-size:12px;color:#7b857b;margin-left:42px}footer{margin-top:45px;border-top:1px solid #dcded4;padding-top:20px;display:flex;justify-content:space-between;color:#7b857b;font-size:12px}footer button{padding:8px}dialog{border:1px solid #dcded4;border-radius:20px;background:#f5f4ee;max-width:420px;padding:30px}dialog::backdrop{background:#233d3670}dialog div{display:flex;justify-content:flex-end;gap:12px;margin-top:24px}@media(max-width:850px){main{padding:24px}.game{gap:28px;grid-template-columns:minmax(0,1.3fr) minmax(220px,1fr)}h1{font-size:36px}.tag{display:none}.cell{font-size:24px}}@media(max-width:620px){main{padding:20px 16px}.intro{margin:24px 0;align-items:flex-start;gap:12px}h1{font-size:29px}.intro .primary{padding:12px;font-size:12px;white-space:nowrap}.intro .primary span{display:none}.intro p:last-child{font-size:12px}.game{display:block}aside{padding-top:24px}aside>h2,aside>.eyebrow,aside>.muted,.how{display:none}#numbers{grid-template-columns:repeat(9,1fr);gap:4px;margin:0}#numbers button{font-size:22px;min-height:48px;border-radius:7px}.actions{margin-top:14px}.cell{font-size:25px}.pencil{font-size:9px;padding:1px}.progress{font-size:10px}footer{margin-top:24px;font-size:10px}}@media(prefers-reduced-motion:no-preference){button{transition:background .15s}}


/* Compact game layout */
main{padding-top:24px;padding-bottom:24px}.status{gap:12px}.status #new{background:#294d40;color:#fff;padding:12px 18px}footer{justify-content:flex-end;margin-top:20px;padding-top:10px}aside{padding-top:0}@media(max-width:620px){.status{gap:6px;font-size:12px}.status #new{padding:12px}.status select{padding:8px 2px}}
footer{gap:16px}#history-dialog{width:min(540px,calc(100% - 32px));max-width:540px}#history-dialog #history-list{display:block;max-height:50vh;overflow:auto;margin:20px 0}#history-dialog table{width:100%;border-collapse:collapse;font-size:13px;text-align:left}#history-dialog th,#history-dialog td{padding:12px 6px;border-bottom:1px solid #dcded4}#history-dialog th{position:sticky;top:0;background:#f5f4ee}.history-note{font-size:12px;color:#6b786b}