:root{--sgr-navy:#10243f;--sgr-paper:#f7f5ef;--sgr-white:#fff;--sgr-line:#9aa5b3;--sgr-soft:#e8edf2;--sgr-focus:#dbe8f5;--sgr-error:#b42318;--sgr-ok:#137a50}
.sgr-app{max-width:1080px;margin:0 auto;padding:clamp(20px,4vw,52px);color:var(--sgr-navy);font-family:inherit;background:var(--sgr-white);border-radius:24px;box-shadow:0 18px 55px rgba(16,35,63,.08)}
.sgr-intro{text-align:center;max-width:720px;margin:0 auto 28px}.sgr-intro h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.05;margin:.15em 0}.sgr-intro p{margin:.5em 0;color:#506174}.sgr-eyebrow{font-size:.75rem!important;font-weight:800;letter-spacing:.18em;color:var(--sgr-navy)!important}
.sgr-toolbar,.sgr-status{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap}.sgr-toolbar label{display:flex;align-items:center;gap:8px;font-weight:700}.sgr-toolbar select,.sgr-app button{min-height:44px;border:0;border-radius:12px;font:inherit;font-weight:750}.sgr-toolbar select{padding:0 38px 0 14px;border:1px solid #cad2dc;background:#fff}.sgr-app button{cursor:pointer;padding:10px 18px;background:var(--sgr-navy);color:#fff}.sgr-app button:hover{filter:brightness(1.12)}.sgr-app button:focus-visible,.sgr-cell:focus-visible{outline:3px solid #6da7d9;outline-offset:2px}.sgr-app .sgr-secondary{background:var(--sgr-paper);color:var(--sgr-navy);border:1px solid #d8dee6}.sgr-app button.active{background:var(--sgr-navy);color:#fff}
.sgr-status{margin:18px auto 14px;font-variant-numeric:tabular-nums}.sgr-status span{padding:6px 12px;background:var(--sgr-paper);border-radius:999px;font-size:.9rem;font-weight:700}
.sgr-daily-note{margin:10px auto -6px;text-align:center;color:#506174;font-size:.86rem}
.sgr-layout{display:grid;grid-template-columns:minmax(300px,600px) minmax(190px,260px);align-items:center;justify-content:center;gap:28px}.sgr-board{aspect-ratio:1;display:grid;grid-template-columns:repeat(9,minmax(0,1fr));grid-template-rows:repeat(9,minmax(0,1fr));background:var(--sgr-navy);border:4px solid var(--sgr-navy);border-radius:10px;overflow:hidden;box-shadow:0 12px 30px rgba(16,35,63,.12)}
.sgr-app .sgr-cell{position:relative!important;display:flex!important;visibility:visible!important;opacity:1!important;align-items:center!important;justify-content:center!important;width:auto!important;height:auto!important;min-width:0!important;min-height:0!important;margin:0!important;padding:0!important;border:0!important;border-radius:0!important;border-right:1px solid var(--sgr-line)!important;border-bottom:1px solid var(--sgr-line)!important;background:#fff!important;color:var(--sgr-navy)!important;font-size:clamp(1.05rem,4.4vw,2rem)!important;font-weight:650!important;font-variant-numeric:tabular-nums;line-height:1!important;cursor:pointer;box-shadow:none}.sgr-app .sgr-cell:nth-child(9n+3),.sgr-app .sgr-cell:nth-child(9n+6){border-right:3px solid var(--sgr-navy)!important}.sgr-app .sgr-cell:nth-child(n+19):nth-child(-n+27),.sgr-app .sgr-cell:nth-child(n+46):nth-child(-n+54){border-bottom:3px solid var(--sgr-navy)!important}.sgr-app .sgr-cell.given{font-weight:850!important;background:var(--sgr-paper)!important;cursor:default}.sgr-app .sgr-cell.peer{background:#f0f4f8!important}.sgr-app .sgr-cell.same{background:#e3edf7!important}.sgr-app .sgr-cell.selected{background:var(--sgr-focus)!important;box-shadow:inset 0 0 0 3px var(--sgr-navy)!important}.sgr-app .sgr-cell.error{color:var(--sgr-error)!important;background:#fff0ee!important}.sgr-app .sgr-cell.hint{color:var(--sgr-ok)!important;background:#eaf7f1!important}.sgr-notes-grid{position:absolute;inset:3px;display:grid;grid-template-columns:repeat(3,1fr);font-size:clamp(.42rem,1.4vw,.72rem);font-weight:650;color:#52657a}.sgr-note{display:flex;align-items:center;justify-content:center}
.sgr-controls{display:grid;gap:16px}.sgr-numbers{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.sgr-numbers button{aspect-ratio:1;padding:0;font-size:1.4rem}.sgr-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.sgr-actions button{padding:9px 8px;font-size:.88rem}.sgr-message{margin:24px auto 0;max-width:620px;padding:18px;text-align:center;border-radius:14px;background:#eaf7f1;color:#075b3a;font-weight:800}.sgr-result-stats{display:flex;justify-content:center;gap:8px 18px;flex-wrap:wrap;margin-top:10px}.sgr-result-stats span{white-space:nowrap}.sgr-new-record{display:block;margin-top:6px}.sgr-result-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:14px}.sgr-message .sgr-result-actions button{min-height:42px}
.sgr-app.is-complete .sgr-controls{opacity:.38;filter:saturate(.55);pointer-events:none}.sgr-app.is-complete .sgr-cell{cursor:default!important}.sgr-app button:disabled{cursor:not-allowed}
.sgr-message.sgr-message-warning{background:#fff0ee;color:var(--sgr-error)}
.sgr-start-panel{position:fixed;inset:0;z-index:99999;display:grid;place-items:center;padding:20px;background:rgba(16,35,63,.58);backdrop-filter:blur(3px)}.sgr-start-panel[hidden]{display:none}.sgr-start-card{width:min(520px,100%);padding:clamp(24px,5vw,38px);border-radius:20px;background:#fff;color:var(--sgr-navy);box-shadow:0 24px 70px rgba(0,0,0,.2);text-align:center}.sgr-start-card h2{margin:0 0 12px;font-size:clamp(1.45rem,4vw,2rem)}.sgr-start-card p{margin:0;color:#506174;line-height:1.55}.sgr-start-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:24px}.sgr-start-actions button{flex:1;min-width:180px}
@media(max-width:760px){.sgr-app{padding:18px 12px;border-radius:16px}.sgr-layout{grid-template-columns:1fr;gap:16px}.sgr-board{box-sizing:border-box;width:min(92vw,390px);max-width:100%;margin-inline:auto;justify-self:center}.sgr-controls{box-sizing:border-box;width:min(92vw,390px);max-width:100%;margin-inline:auto}.sgr-notes-grid{inset:1px;font-size:.66rem}.sgr-numbers{grid-template-columns:repeat(10,1fr);gap:8px}.sgr-numbers button{grid-column:span 2;aspect-ratio:auto;font-size:1.1rem;min-height:50px;border-radius:9px}.sgr-numbers button:nth-child(6){grid-column:2/span 2}.sgr-actions{grid-template-columns:repeat(4,1fr)}.sgr-actions button{font-size:.75rem}.sgr-toolbar button{flex:1}.sgr-toolbar label{width:100%;justify-content:center}}
@media(prefers-reduced-motion:no-preference){.sgr-cell,.sgr-app button{transition:background-color .15s,transform .12s}.sgr-app button:active{transform:scale(.97)}}
.sgr-debug{margin:14px auto 0;padding:8px 12px;max-width:720px;border:1px dashed #64748b;border-radius:8px;background:#f8fafc;color:#334155;font:600 12px/1.4 monospace;text-align:center}