.puzzle-heading{display:flex;align-items:end;justify-content:space-between;gap:30px}.info-grid{display:grid;grid-template-columns:repeat(6,1fr);margin-top:36px;border:1px solid var(--line);border-radius:14px;overflow:hidden}.info-grid div{padding:16px;border-right:1px solid var(--line)}.info-grid div:last-child{border-right:0}.info-grid dt{color:var(--muted);font-size:12px;font-weight:700}.info-grid dd{margin-top:4px;font-weight:800;font-size:14px}.puzzle-workspace{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px;align-items:start}.workspace-main{padding:30px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow)}.workspace-header{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.workspace-header h2{font-size:28px;line-height:1.3}.progress{color:var(--muted);font-size:14px;font-weight:700}.sudoku-shell{width:min(100%,610px);margin-inline:auto}.sudoku-grid{display:grid;grid-template-columns:repeat(9,1fr);border:3px solid var(--ink);background:var(--ink);aspect-ratio:1}.sudoku-cell{position:relative;display:grid;place-items:center;aspect-ratio:1;border:0;border-right:1px solid #b7c0cc;border-bottom:1px solid #b7c0cc;background:#fff;color:#1f64a7;font-weight:700;font-size:clamp(18px,3vw,30px);line-height:1}.sudoku-cell:nth-child(3n){border-right:3px solid var(--ink)}.sudoku-cell:nth-child(9n){border-right:0}.sudoku-cell:nth-child(n+19):nth-child(-n+27),.sudoku-cell:nth-child(n+46):nth-child(-n+54){border-bottom:3px solid var(--ink)}.sudoku-cell:nth-child(n+73){border-bottom:0}.sudoku-cell.is-given{background:#f4f6f8;color:var(--ink);font-weight:850;cursor:default}.sudoku-cell.is-selected{background:#d9eee8;box-shadow:inset 0 0 0 3px var(--accent);z-index:2}.sudoku-cell.is-related:not(.is-selected){background:#f0f7f5}.sudoku-cell.is-same:not(.is-selected){background:#dff0fb}.sudoku-cell.is-error{background:var(--danger-soft);color:var(--danger)}.sudoku-cell.is-error::after{content:"!";position:absolute;top:3px;right:5px;color:var(--danger);font-size:11px;font-weight:900}.sudoku-cell.is-hint{color:var(--accent);background:#effaf5}.status-message{min-height:28px;margin:18px 0 12px;color:var(--muted);text-align:center;font-size:14px}.status-message.is-error{color:var(--danger);font-weight:700}.status-message.is-success{color:var(--accent-dark);font-weight:800}.number-pad{display:grid;grid-template-columns:repeat(10,1fr);gap:7px;margin-top:14px}.number-pad button{min-height:46px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);font-weight:800}.number-pad button:hover{background:var(--accent-soft);border-color:#9bcbbb}.number-pad__erase{grid-column:auto;padding-inline:10px;font-size:13px}.control-bar{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin-top:18px}.workspace-side{padding:24px;border-radius:16px;background:var(--soft)}.workspace-side h2{font-size:22px}.workspace-side ol{margin-top:14px;padding-left:22px;color:var(--muted)}.workspace-side li+li{margin-top:8px}.toggle-row{display:flex;align-items:center;gap:10px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line);font-weight:700}.toggle-row input{width:18px;height:18px;accent-color:var(--accent)}.keyboard-note{display:grid;gap:4px;margin-top:20px;padding:14px;border-radius:10px;background:#fff;color:var(--muted);font-size:13px}.keyboard-note strong{color:var(--ink)}.content-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:42px;margin-top:78px}.content-grid .prose{margin-top:0}.solution-panel{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}.solution-panel summary{padding:18px 20px;font-weight:800;cursor:pointer}.solution-panel__content{padding:0 20px 20px;color:var(--muted)}.solution-grid{display:grid;grid-template-columns:repeat(9,1fr);margin-top:18px;border:2px solid var(--ink);aspect-ratio:1}.solution-grid span{display:grid;place-items:center;border-right:1px solid #cbd2dc;border-bottom:1px solid #cbd2dc;color:var(--ink);font-weight:700;font-size:12px}.solution-grid span:nth-child(3n){border-right:2px solid var(--ink)}.solution-grid span:nth-child(9n){border-right:0}.solution-grid span:nth-child(n+19):nth-child(-n+27),.solution-grid span:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--ink)}.solution-grid span:nth-child(n+73){border-bottom:0}.related-box{margin-top:20px;padding:22px;border-radius:14px;background:var(--soft)}.related-box h2{font-size:21px}.related-box p:not(.eyebrow){margin:10px 0;color:var(--muted)}.faq{margin-top:80px;padding-top:50px;border-top:1px solid var(--line)}.faq h2{font-size:34px}.faq details{border-bottom:1px solid var(--line)}.faq summary{padding:20px 0;font-weight:800;cursor:pointer}.faq details p{padding:0 0 20px;color:var(--muted)}
@media(max-width:980px){.info-grid{grid-template-columns:repeat(3,1fr)}.info-grid div{border-bottom:1px solid var(--line)}.info-grid div:nth-child(3n){border-right:0}.info-grid div:nth-child(n+4){border-bottom:0}.puzzle-workspace{grid-template-columns:1fr}.workspace-side{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.workspace-side h2,.workspace-side ol{grid-column:1/-1}.content-grid{grid-template-columns:1fr}}
@media(max-width:640px){.puzzle-page{padding-top:28px}.puzzle-heading{align-items:flex-start;flex-direction:column}.info-grid{grid-template-columns:repeat(2,1fr)}.info-grid div:nth-child(3n){border-right:1px solid var(--line)}.info-grid div:nth-child(2n){border-right:0}.info-grid div:nth-child(n+4){border-bottom:1px solid var(--line)}.info-grid div:nth-child(n+5){border-bottom:0}.workspace-main{padding:16px 12px}.workspace-header{align-items:flex-start;flex-direction:column;gap:4px}.sudoku-cell{font-size:clamp(17px,6vw,25px)}.number-pad{grid-template-columns:repeat(5,1fr)}.number-pad__erase{grid-column:5}.control-bar{display:grid;grid-template-columns:1fr 1fr}.workspace-side{display:block}.content-grid{margin-top:56px}}