*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none;touch-action:manipulation}#app{min-height:100%;display:flex;align-items:center;justify-content:center;padding:16px}.game{width:min(94vw,460px,calc((100dvh - 340px) / 1.2));min-width:288px;display:flex;flex-direction:column;gap:14px}.crumb{font-size:14px}.crumb a{color:var(--accent);text-decoration:none;font-weight:700}.crumb a:hover{text-decoration:underline}.topbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}.title{font-size:clamp(34px,10vw,52px);font-weight:800;line-height:1;letter-spacing:-1px}.scores{display:flex;gap:8px}.score-box{background:var(--board-bg);color:var(--accent-text);border-radius:6px;padding:6px 12px;text-align:center;min-width:64px}.score-box .label{font-size:11px;text-transform:uppercase;letter-spacing:1px;opacity:.85;font-weight:700}.score-box .value{font-size:20px;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums}.diffbar{display:flex;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:4px}.diff{flex:1;border:none;background:transparent;color:var(--text);font-size:14px;font-weight:700;padding:8px 4px;border-radius:6px;cursor:pointer;transition:background .12s ease,color .12s ease}.diff:hover{background:var(--line)}.diff.active{background:var(--accent);color:var(--accent-text)}.board{position:relative;width:100%}.sgrid{display:grid;grid-template-columns:repeat(9,1fr);width:100%;aspect-ratio:1 / 1;background:var(--board-bg);border:3px solid var(--board-bg);border-radius:10px;overflow:hidden;gap:1px}.scell{position:relative;background:var(--cell-bg);display:flex;align-items:center;justify-content:center;cursor:pointer;user-select:none;-webkit-user-select:none;font-variant-numeric:tabular-nums}.scell:nth-child(9n+3),.scell:nth-child(9n+6){margin-right:2px}.scell:nth-child(n+19):nth-child(-n+27),.scell:nth-child(n+46):nth-child(-n+54){margin-bottom:2px}.scell .val{font-size:clamp(18px,5.4vw,26px);font-weight:700;line-height:1;color:var(--accent)}.scell.has-val .val{color:var(--accent)}.scell.given{background:var(--surface);cursor:default}.scell.given .val{color:var(--text);font-weight:800}.scell.peer{background:color-mix(in srgb,var(--accent) 12%,var(--cell-bg))}.scell.given.peer{background:color-mix(in srgb,var(--accent) 12%,var(--surface))}.scell.same{background:color-mix(in srgb,var(--accent) 26%,var(--cell-bg))}.scell.same .val{font-weight:800}.scell.selected{background:color-mix(in srgb,var(--accent) 40%,var(--cell-bg))}.scell.selected .val{color:var(--accent-text)}.scell.conflict .val{color:#e8503a}.scell.conflict{background:color-mix(in srgb,#e8503a 20%,var(--cell-bg))}.scell.selected.conflict{background:color-mix(in srgb,#e8503a 42%,var(--cell-bg))}.scell.selected.conflict .val{color:#fff}.scell .notes{display:none;position:absolute;inset:6%;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);pointer-events:none}.scell.has-notes .notes{display:grid}.scell .notes i{display:flex;align-items:center;justify-content:center;font-style:normal;font-size:clamp(8px,2.1vw,11px);line-height:1;color:var(--muted);font-weight:600}.pad{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.num{aspect-ratio:1 / 1;border:1px solid var(--line);background:var(--surface);color:var(--text);font-size:clamp(20px,6vw,26px);font-weight:800;border-radius:8px;cursor:pointer;transition:filter .12s ease,background .12s ease,transform 80ms ease}.num:hover{background:var(--line)}.num:active{transform:scale(.94)}.num.erase{font-size:clamp(18px,5vw,22px)}.num.done{opacity:.32}.controls{display:flex;align-items:center;justify-content:space-between;gap:10px}.btn{background:var(--accent);color:var(--accent-text);border:none;border-radius:6px;padding:10px 16px;font-size:14px;font-weight:700;cursor:pointer;white-space:nowrap;transition:filter .12s ease}.btn:hover{filter:brightness(1.05)}.btn:active{filter:brightness(.95)}.btn.ghost{background:var(--surface);color:var(--text);border:1px solid var(--line)}.btn.ghost.active{background:var(--accent);color:var(--accent-text);border-color:transparent}.how{font-size:13px;opacity:.85;line-height:1.4}.how b{font-weight:700}.overlay{position:absolute;inset:0;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:20px;background:var(--overlay-bg);z-index:10;opacity:0;pointer-events:none;transition:opacity .2s ease}.overlay.show{opacity:1;pointer-events:auto}.overlay.show .msg{animation:solvedPop .36s ease}@keyframes solvedPop{0%{transform:scale(.6);opacity:0}60%{transform:scale(1.08);opacity:1}to{transform:scale(1);opacity:1}}.overlay .msg{font-size:clamp(28px,9vw,44px);font-weight:800;color:var(--accent)}.overlay .sub{font-size:16px;color:var(--text);opacity:.9;font-variant-numeric:tabular-nums}.overlay .actions{display:flex;gap:10px;margin-top:8px}@media(max-width:390px){.game{gap:12px}.pad{gap:6px}}