:root{color-scheme:light;--bg:#f8fafc;--ink:#0f172a;--muted:#64748b;--blue:#2563eb;--green:#16a34a;--red:#dc2626;--line:#e2e8f0;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer}button,input,label{ -webkit-tap-highlight-color:transparent}button{touch-action:manipulation}button:focus-visible,input:focus-visible{outline:3px solid #f59e0b;outline-offset:4px}button:disabled{cursor:default}.app{max-width:1120px;margin:auto;padding:28px 32px 18px}.header{display:flex;align-items:center;justify-content:space-between;padding-bottom:24px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;font-weight:750;font-size:13px;letter-spacing:1.1px}.brand-icon{background:var(--blue);color:white;display:grid;place-items:center;width:34px;height:34px;border-radius:10px;font-size:26px}.brand-light{font-weight:450;color:var(--muted);letter-spacing:0}.age{font-size:12px;border:1px solid var(--line);border-radius:8px;padding:5px 9px;color:var(--muted)}.intro{padding:32px 0 26px}.eyebrow{font-size:10px;font-weight:750;letter-spacing:1.8px;color:var(--blue)}h1{font-size:38px;letter-spacing:-1.4px;margin:10px 0}p{line-height:1.6}.intro>p:last-child{color:var(--muted);font-size:15px;margin:0}.layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:24px;align-items:start}.play-card,.panel{background:white;border:1px solid var(--line);border-radius:20px}.play-card{padding:24px;box-shadow:0 6px 24px #0f172a03}fieldset{margin:0;padding:0;border:0;min-width:0}legend{font-size:13px;font-weight:650;margin-bottom:12px}.level-options{display:flex;gap:8px}.level-options label{position:relative;flex:1;cursor:pointer}.level-options input{position:absolute;opacity:0;width:100%;height:100%;margin:0}.level-options label span{display:flex;flex-direction:column;align-items:center;gap:3px;border:1px solid var(--line);border-radius:11px;padding:10px 4px}.level-options strong{font-size:19px}.level-options small{color:var(--muted);font-size:11px}.level-options input:checked+span{border-color:var(--blue);background:#eff6ff;color:var(--blue)}.level-options input:checked+span small{color:var(--blue)}.level-options input:focus-visible+span{outline:3px solid #f59e0b;outline-offset:3px}.dashboard{display:grid;grid-template-columns:1.5fr 1fr .65fr;align-items:center;gap:10px;padding:24px 0 18px;background:white}.metric-label{display:block;font-size:9px;font-weight:700;letter-spacing:1px;color:var(--muted)}.timer{font-size:38px;line-height:1.45;font-weight:700;letter-spacing:-1.6px;font-variant-numeric:tabular-nums}.next-wrap{text-align:center;border-left:1px solid var(--line);border-right:1px solid var(--line)}.next{display:block;font-size:34px;line-height:1.55;color:var(--blue)}.errors-wrap{text-align:center}.errors-wrap strong{display:block;font-size:26px;line-height:2}.errors-wrap.has-errors strong{color:var(--red)}.board-wrap{position:relative;isolation:isolate}.board{display:grid;grid-template-columns:repeat(var(--size,5),minmax(0,1fr));gap:8px;user-select:none;-webkit-user-select:none;touch-action:manipulation}.cell{position:relative;aspect-ratio:1;border:1px solid #dce4ee;background:#f8fafc;border-radius:11px;color:var(--ink);font-size:clamp(23px,3vw,35px);font-weight:650;transition:background .14s,transform .12s,border-color .14s}.cell:active{transform:scale(.94)}.cell.found{background:#effaf2;border-color:#bce9c8;color:#15803d}.cell.found:after{content:'✓';position:absolute;right:7px;top:3px;font-size:12px}.cell.wrong{animation:wrong .35s ease}.ready{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:12px;background:#f8fafcf5;text-align:center;padding:12px}.ready[hidden]{display:none}.ready-icon{display:grid;place-items:center;background:#eaf1ff;color:var(--blue);border-radius:15px;width:52px;height:52px;font-size:30px}.ready h2{margin:18px 0 0;font-size:22px;letter-spacing:-.5px}.ready p{color:var(--muted);font-size:13px;margin:10px 0 22px}.button{min-height:46px;border-radius:10px;border:0;padding:12px 20px;font-size:14px;font-weight:650}.primary{background:var(--blue);color:white;box-shadow:0 4px 10px #2563eb20}.primary:hover{background:#1d4ed8}.ready .button{min-width:180px;display:flex;justify-content:space-between}.secondary{border:1px solid var(--line);background:white;color:#475569}.secondary:hover{background:#f1f5f9}.progress-track{height:4px;background:#edf2f7;border-radius:4px;margin:20px 0 10px;overflow:hidden}#progress{height:100%;background:var(--green);width:0;transition:width .15s}.board-caption{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:11px;min-height:30px}#count{white-space:nowrap;font-variant-numeric:tabular-nums}.actions{display:flex;gap:10px;margin-top:6px}.actions button{flex:1}.tip{font-size:11px;color:var(--muted);text-align:center;margin:15px 0 0}.sidebar{display:grid;gap:16px}.panel{padding:23px}h2{font-size:16px;margin:0;font-weight:700}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.badge{font-size:11px;color:var(--blue);background:#eff6ff;padding:5px 9px;border-radius:6px}.record{margin:22px 0;background:#f8fafc;border-radius:12px;padding:19px}.record>strong{display:block;font-size:35px;letter-spacing:-1px;font-variant-numeric:tabular-nums;margin:6px 0}.record>span:last-child{font-size:11px;color:var(--muted)}.stats-row{display:grid;grid-template-columns:1.3fr 1fr;gap:15px}.stats-row>div+div{border-left:1px solid var(--line);padding-left:20px}.stats-row strong{display:block;font-size:22px}.stats-row span{display:block;font-size:11px;color:var(--muted);margin-top:5px}.name-label{display:block;font-size:12px;color:var(--muted);margin:20px 0 7px}#player{width:100%;height:42px;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:8px 12px;color:var(--ink)}.toggle-row{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:12px;margin-top:18px;cursor:pointer;min-height:26px}.toggle-row input{appearance:none;width:36px;height:22px;border-radius:20px;background:#cbd5e1;position:relative;flex-shrink:0;margin:0;cursor:pointer}.toggle-row input:before{content:'';position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:white;transition:transform .15s}.toggle-row input:checked{background:var(--blue)}.toggle-row input:checked:before{transform:translateX(14px)}.setting-help{font-size:10px;line-height:1.6;color:var(--muted);margin:8px 0 0}.empty{font-size:12px;color:var(--muted);padding:13px 0}.history-icon{color:var(--muted);font-size:22px}.history{list-style:none;margin:14px 0 0;padding:0}.history li{display:flex;justify-content:space-between;align-items:center;gap:10px;border-bottom:1px solid #f1f5f9;padding:11px 0;font-size:13px}.history time,.history small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.history li>div:last-child{text-align:right}.clean{color:#15803d!important}.text-button{border:0;background:transparent;color:var(--muted);font-size:11px;min-height:40px;padding:10px 0;text-decoration:underline;text-underline-offset:3px}.text-button:disabled{opacity:.4}.storage-message{font-size:11px;color:#b45309;margin:0}footer{text-align:center;color:#94a3b8;font-size:11px;padding:26px 0 8px}dialog{border:1px solid var(--line);border-radius:22px;max-width:420px;width:calc(100% - 32px);padding:30px;text-align:center;color:var(--ink)}dialog::backdrop{background:#0f172a70;backdrop-filter:blur(5px)}.result-icon{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;margin:0 auto 20px;background:#dcfce7;color:var(--green);font-size:30px}dialog h2{font-size:27px;overflow-wrap:anywhere}dialog p{color:var(--muted);font-size:13px}.result-time{display:block;font-size:48px;letter-spacing:-2px;font-variant-numeric:tabular-nums}.result-record{border-radius:12px;background:#f0fdf4;padding:15px;margin:20px 0;color:#15803d;font-size:14px}.result-record p{margin:6px 0 0}dialog .button,dialog .text-button{width:100%}@keyframes wrong{0%,100%{transform:translateX(0)}25%,75%{transform:translateX(-3px);background:#fee2e2;border-color:var(--red);color:var(--red)}50%{transform:translateX(3px)}}
@media(min-width:761px){body.playing .history-panel{opacity:.5}}
@media(max-width:760px){.app{padding:18px 18px 10px;max-width:580px}.header{padding-bottom:18px}.intro{padding:24px 0}.intro h1{font-size:32px}.layout{grid-template-columns:1fr;gap:16px}.sidebar{gap:16px}.play-card{padding:18px}.dashboard{position:sticky;top:0;z-index:2;padding:14px 0}.cell{font-size:30px}.panel{padding:20px}.ready h2{font-size:21px}}
@media(max-width:360px){.app{padding:12px}.brand{gap:8px;font-size:11px}.brand-light{font-size:10px}.intro h1{font-size:29px}.intro>p:last-child{font-size:13px}.eyebrow{font-size:8px;letter-spacing:1.3px}.play-card{padding:12px}.board{gap:5px}.cell{font-size:24px;border-radius:8px}.timer{font-size:30px}.metric-label{font-size:8px;letter-spacing:.4px}.next{font-size:30px}.button{padding:12px 10px;font-size:12px}.ready-icon{width:34px;height:34px;font-size:23px}.ready h2{margin-top:9px;font-size:18px}.ready p{font-size:11px;margin:7px 0 12px}.board-caption{font-size:10px}.tip{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}.cell.wrong{background:#fee2e2;border-color:var(--red)}}
@media(max-width:760px){
  .app{padding:12px 8px 10px;max-width:none}
  .play-card{padding:0;border:0;border-radius:0;box-shadow:none;background:transparent}
  .dashboard{background:var(--bg)}
  .board{gap:6px}
}