:root{--bg: #f4f1ea;--surface: #ffffff;--text: #2b2a27;--muted: #76726a;--border: #d9d4c8;--accent: #d85a30;--sun: #f2b705;--moon: #3b3a6b;--bad: #e0563b;--cell-empty: #efeadd;--radius: 12px;--maxw: 460px}@media (prefers-color-scheme: dark){:root{--bg: #16151a;--surface: #201f27;--text: #ece9e2;--muted: #9b978d;--border: #34323c;--cell-empty: #2a2932;--moon: #b9b7e6}}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Hiragino Kaku Gothic ProN,Noto Sans JP,sans-serif;-webkit-tap-highlight-color:transparent}#app{max-width:var(--maxw);margin:0 auto;padding:16px 16px 48px;display:flex;flex-direction:column;align-items:center;gap:14px}.head{text-align:center;margin-top:6px}.title{font-size:30px;letter-spacing:.06em;margin:0;font-weight:800}.sub{margin:4px 0 0;color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.hud{display:flex;gap:10px;width:100%;max-width:360px}.stat{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:8px 4px;text-align:center;display:flex;flex-direction:column;gap:2px}.stat .lbl{font-size:11px;color:var(--muted)}.stat span:last-child{font-size:18px;font-weight:700;font-variant-numeric:tabular-nums}.board{display:grid;grid-template-columns:repeat(var(--n, 6),1fr);grid-template-rows:repeat(var(--n, 6),1fr);gap:6px;width:100%;max-width:360px;aspect-ratio:1 / 1;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:8px;overflow:hidden}.cell{border:1px solid var(--border);border-radius:9px;background:var(--cell-empty);font-size:clamp(18px,7vw,30px);line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;padding:0;min-width:0;min-height:0;transition:transform .05s ease,background .1s ease;-webkit-user-select:none;user-select:none;touch-action:manipulation;-webkit-touch-callout:none}.cell:active{transform:scale(.92)}.cell.sun{background:color-mix(in srgb,var(--sun) 18%,var(--surface))}.cell.moon{background:color-mix(in srgb,var(--moon) 16%,var(--surface))}.cell.fixed{background:var(--surface);box-shadow:inset 0 0 0 2px var(--border);cursor:default}.cell.bad{box-shadow:inset 0 0 0 2px var(--bad)}.cell:disabled{cursor:default}.toolbar{display:flex;gap:8px;align-items:center}.link{background:none;border:none;color:var(--muted);font-size:13px;cursor:pointer;padding:4px 8px}.link:active{transform:scale(.97)}.rules{width:100%;max-width:360px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:4px 18px;font-size:13.5px;color:var(--text)}.rules ul{padding-left:18px;line-height:1.7}.rules .hint{color:var(--muted);font-size:12px}.panel{width:100%;max-width:360px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-align:center;display:flex;flex-direction:column;gap:10px}.panel h2{margin:0;font-size:22px}.win-line{margin:0;color:var(--muted);font-size:13.5px}.win-rating{margin:0;font-size:18px;letter-spacing:2px;color:var(--sun)}.next{margin:0;font-size:12px;color:var(--muted)}.btn-primary{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:12px 16px;font-size:15px;font-weight:700;cursor:pointer}.btn-primary:active{transform:scale(.98)}.btn-secondary{background:transparent;color:var(--text);border:1px solid var(--border);border-radius:10px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer}.btn-secondary:active{transform:scale(.98)}.foot{color:var(--muted);font-size:12px;margin-top:4px}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:999px;font-size:13px;box-shadow:0 4px 16px #0003;z-index:30}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;padding:16px;z-index:20}.sheet{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);width:100%;max-width:360px;max-height:82vh;display:flex;flex-direction:column;gap:10px;padding:16px}.sheet-narrow{text-align:center}.sheet-head{display:flex;justify-content:space-between;align-items:center}.sheet-head h2{margin:0;font-size:18px}.free-note{margin:0;font-size:12px;color:var(--muted)}.archive-list{overflow-y:auto;display:flex;flex-direction:column;gap:6px;-webkit-overflow-scrolling:touch}.arch-item{display:flex;justify-content:space-between;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:11px 13px;font-size:14px;color:var(--text);cursor:pointer;font-variant-numeric:tabular-nums}.arch-item.current{box-shadow:inset 0 0 0 2px var(--accent)}.arch-item.locked{color:var(--muted)}.arch-item:active{transform:scale(.99)}.premium-desc{margin:0;font-size:13.5px;color:var(--text);line-height:1.6}.premium-price{margin:2px 0 4px;font-size:18px;font-weight:800}