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(prefers-color-scheme:dark){.sp-root{--sp-bg:#1d1d24;--sp-page:#16161b;--sp-line:#3a3a44;--sp-line-strong:#e8e7ef;--sp-given:#e8e7ef;--sp-placed:#93abe0;--sp-cascade:#4fd07f;--sp-cand:#8e8e96;--sp-scan-bg:#20242e;--sp-blocker-bg:#46201b;--sp-blocker-fg:#e2685a;--sp-excluded-fg:#8e8e96;--sp-target-bg:#3b3418;--sp-hypo-bg:#3a2b16;--sp-hypo-fg:#e8a25c;--sp-conflict-bg:#99271a;--sp-conflict-fg:#f6dcd7;--sp-panel-bg:#26262f;--sp-text:#e8e7ef}}.sp-legend{color:var(--sp-cand);text-align:center;letter-spacing:.5px;padding:2px 0 8px;font-size:11px}.sp-badge{color:var(--sp-target-text,#1a7a3a);vertical-align:1px;border:1px solid;border-radius:8px;margin-left:6px;padding:1px 6px;font-size:11px;font-weight:600;display:inline-block}.sp-board{aspect-ratio:1;border:1.5px solid var(--sp-line-strong);background:var(--sp-bg);-webkit-user-select:none;user-select:none;grid-template-rows:repeat(9,1fr);grid-template-columns:repeat(9,1fr);display:grid}.sp-cell{border-right:.5px solid var(--sp-line);border-bottom:.5px solid var(--sp-line);font-family:var(--sp-serif);background:var(--sp-bg);justify-content:center;align-items:center;font-size:clamp(16px,5vw,24px);line-height:1;display:flex;position:relative}.sp-cell:nth-child(9n){border-right:none}.sp-cell:nth-child(n+73){border-bottom:none}.sp-cell.b-right{border-right:1.5px solid var(--sp-line-strong)}.sp-cell.b-bottom{border-bottom:1.5px solid var(--sp-line-strong)}.sp-cell.given{color:var(--sp-given);font-weight:600}.sp-cell.placed{color:var(--sp-placed);font-weight:500}.sp-cell.cascade{color:var(--sp-cascade);font-weight:500}.sp-cell.scan{background:var(--sp-scan-bg)}.sp-cell.blocker{background:var(--sp-blocker-bg);color:var(--sp-blocker-fg)}.sp-cell.target{background:var(--sp-target-bg)}.sp-cell.hypo{background:var(--sp-hypo-bg)}.sp-cell.conflict{background:var(--sp-conflict-bg)}.sp-cell.conflict .sp-cands{color:var(--sp-conflict-fg)}.sp-hypo-digit{color:var(--sp-hypo-fg);font-weight:700}.sp-excluded-mark{color:var(--sp-excluded-fg);pointer-events:none;justify-content:center;align-items:center;font-size:1.1em;font-weight:700;display:flex;position:absolute;inset:0}.sp-cands{color:var(--sp-cand);grid-template-rows:repeat(3,1fr);grid-template-columns:repeat(3,1fr);font-family:system-ui,sans-serif;font-size:clamp(7px,2vw,10px);display:grid;position:absolute;inset:1px}.sp-cands span{justify-content:center;align-items:center;display:flex}.sp-cell.pencil .sp-cands .in-pattern{color:var(--sp-hypo-fg);font-weight:700}@keyframes sp-pop{0%{transform:scale(.2)}60%{transform:scale(1.25)}to{transform:scale(1)}}.sp-pop{animation:.4s ease-out sp-pop;display:inline-block}.sp-controls{flex-wrap:wrap;align-items:center;gap:8px;padding:12px 0 8px;display:flex}.sp-controls button,.sp-controls select{border:1px solid var(--sp-line);background:var(--sp-bg);min-height:44px;color:var(--sp-text);cursor:pointer;appearance:none;border-radius:999px;padding:0 16px;font-size:14px}.sp-controls button:active{background:var(--sp-panel-bg);transform:scale(.97)}.sp-controls button:disabled{opacity:.35}.sp-progress{font-variant-numeric:tabular-nums;color:var(--sp-cand);margin-left:auto;font-size:12px}.sp-slider{width:100%;accent-color:var(--sp-given)}.sp-narration{background:var(--sp-panel-bg);border-radius:12px;margin-top:10px;padding:14px;font-size:14px;line-height:1.65}.sp-narration h4{margin:0 0 6px;font-size:15px}.sp-narration .sp-full{white-space:pre-wrap;margin-top:8px}.sp-toggle-full{color:var(--sp-placed);cursor:pointer;background:0 0;border:none;margin-top:8px;padding:6px 0;font-size:13px}:root{--paper:#f6f4ed;--card:#fdfcf8;--panel:#ece9df;--ink:#26262e;--ink-2:#5a5a64;--muted:#8e8e96;--hairline:#cbc8bd;--hairline-strong:#26262e;--line:#cbc8bd;--accent:#35508f;--user-blue:#35508f;--sel-bg:#f3e1a6;--sel-ring:#c9a227;--peer-bg:#e5eaf4;--same-bg:#cfd9ec;--hypo-fg:#c77023;--hypo-bg:#f7e3c8;--hypo-border:#c77023;--conflict-bg:#c4402f;--conflict-fg:#fbedea;--conflict-tint:#f5dcd6;--error:#c4402f;--cascade-green:#1f7a44;--serif:Georgia, "Songti SC", "STSong", serif;--sans:system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;--r-sm:8px;--r-md:12px;--r-full:999px;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}@media (prefers-color-scheme:dark){:root{--paper:#16161b;--card:#1d1d24;--panel:#26262f;--ink:#e8e7ef;--ink-2:#b3b2bd;--muted:#8e8e96;--hairline:#3a3a44;--hairline-strong:#e8e7ef;--line:#3a3a44;--accent:#93abe0;--user-blue:#93abe0;--sel-bg:#3b3418;--sel-ring:#d9b84a;--peer-bg:#20242e;--same-bg:#2b3242;--hypo-fg:#e8a25c;--hypo-bg:#3a2b16;--hypo-border:#c77023;--conflict-bg:#99271a;--conflict-fg:#f6dcd7;--conflict-tint:#46201b;--error:#e2685a;--cascade-green:#4fd07f}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{touch-action:manipulation}body{background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0}.app{max-width:430px;padding:8px 16px calc(16px + var(--safe-bottom));min-height:100dvh;margin:0 auto}button{font-family:var(--sans);color:var(--ink);cursor:pointer;background:0 0;border:none;padding:0}button:disabled{opacity:.35}.topbar{z-index:9;background:var(--paper);padding:calc(var(--safe-top) + 10px) 0 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var(--hairline);border-radius:var(--r-md);background:var(--card);text-align:left;min-height:48px;padding:14px 16px;font-size:14px;transition:transform 80ms}.home-entry:active{background:var(--panel);transform:scale(.98)}.seg{border:1px solid var(--hairline);border-radius:var(--r-full);background:var(--card);margin-bottom:16px;padding:3px;display:flex}.seg button{border-radius:var(--r-full);color:var(--muted);flex:1;min-height:40px;padding:9px 0;font-size:14px}.seg button.on{background:var(--ink);color:var(--paper)}.tier-list{flex-direction:column;gap:8px;display:flex}.tier-card{border:1px solid var(--hairline);border-radius:var(--r-md);background:var(--card);text-align:left;justify-content:space-between;align-items:center;min-height:60px;padding:14px 16px;transition:transform 80ms;display:flex}.tier-card:active{background:var(--panel);transform:scale(.98)}.tier-card .t-name{font-size:16px;font-weight:600}.tier-card .t-desc{color:var(--muted);margin-top:2px;font-size:12px}.tier-card 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var(--safe-bottom));border-radius:16px 16px 0 0;margin:0 auto;animation:.28s ease-out sheet-up;overflow:auto}@keyframes sheet-up{0%{opacity:.6;transform:translateY(40%)}to{opacity:1;transform:translateY(0)}}.sheet-grip{background:var(--hairline);border-radius:2px;width:40px;height:4px;margin:4px auto 10px}.sheet-close{width:100%;margin-top:10px}.sheet-explain{flex-direction:column;display:flex;position:relative;overflow:hidden}.sheet-grip-btn{flex-shrink:0;justify-content:center;width:100%;padding:8px 0 6px;display:flex}.sheet-grip-btn .sheet-grip{margin:0 auto}.sheet-x{width:44px;height:44px;color:var(--muted);z-index:2;justify-content:center;align-items:center;font-size:18px;display:flex;position:absolute;top:4px;right:4px}.sheet-x:active{color:var(--ink)}.sheet-explain .hint-toggle{flex-shrink:0}.sheet-explain .sp-root{flex-direction:column;flex:1;min-height:0;display:flex}.sheet-explain .sp-legend,.sheet-explain .sp-board,.sheet-explain .sp-controls,.sheet-explain 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