:root{--bg: #0f1420;--panel: #171e2e;--panel-2: #1e2740;--line: #38445f;--line-thick: #7c8db5;--text: #e8edf7;--muted: #8b98b5;--given: #cdd7ee;--entry: #5aa9ff;--accent: #3b82f6;--accent-soft: rgba(59, 130, 246, .28);--same: rgba(120, 140, 180, .16);--conflict: #ff5c6c;--radius: 12px;--font: "Segoe UI", system-ui, -apple-system, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:radial-gradient(1200px 800px at 70% -10%,#1b2440,var(--bg));color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased}.app{max-width:720px;margin:0 auto;min-height:100%;padding:18px 16px 24px;display:flex;flex-direction:column;gap:16px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.topbar h1{font-size:24px;font-weight:800;letter-spacing:-.5px;margin:0}.topbar h1 span{color:var(--accent)}.meta{display:flex;align-items:center;gap:10px}.timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:18px;color:var(--muted);min-width:58px;text-align:right}.meta select,.meta button{background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:14px;font-weight:600;cursor:pointer}.meta select:hover,.meta button:hover{border-color:var(--line-thick)}.new-game{background:var(--accent)!important;border-color:var(--accent)!important;color:#fff!important}.playfield{display:flex;flex-direction:column;gap:18px}.board-wrap{position:relative;width:100%;aspect-ratio:1 / 1;background:var(--panel);border-radius:var(--radius);padding:10px;box-shadow:0 12px 40px #00000059}.board{width:100%;height:100%;display:block;touch-action:none;-webkit-user-select:none;user-select:none}.board .selected{fill:var(--accent-soft)}.board .same-value{fill:var(--same)}.board .cursor{fill:none;stroke:var(--accent);stroke-width:3;rx:4;pointer-events:none}.board text{text-anchor:middle;dominant-baseline:central;pointer-events:none;font-family:var(--font)}.board .value{font-size:34px;font-weight:600}.board .value.given{fill:var(--given);font-weight:700}.board .value.entry{fill:var(--entry)}.board .value.conflict{fill:var(--conflict)!important}.board .corner{font-size:13px;font-weight:600;fill:var(--muted)}.board .center{font-weight:600;fill:var(--muted);letter-spacing:.5px}.board .grid-thin line{stroke:var(--line);stroke-width:1.2}.board .grid-thick line{stroke:var(--line-thick);stroke-width:2.6;stroke-linecap:round}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:#0a0e188c;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);border-radius:var(--radius);font-size:18px;font-weight:700;color:var(--muted)}.overlay.win{background:#0a0e18b8}.win-card{text-align:center;background:var(--panel-2);border:1px solid var(--line);border-radius:16px;padding:28px 40px;box-shadow:0 20px 60px #00000080}.win-title{font-size:30px;font-weight:800;color:var(--text)}.win-time{font-size:20px;color:var(--muted);margin:6px 0 18px;font-variant-numeric:tabular-nums}.win-card button{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:12px 22px;font-size:15px;font-weight:700;cursor:pointer}.controls{display:flex;flex-direction:column;gap:12px}.modes{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.mode{position:relative;background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:12px 6px;font-size:14px;font-weight:700;cursor:pointer}.mode:hover{border-color:var(--line-thick)}.mode.active{background:var(--accent);border-color:var(--accent);color:#fff}.mode .hint{display:block;font-size:10px;font-weight:600;opacity:.6;margin-top:2px}.numpad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.num{aspect-ratio:1 / 1;background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:12px;font-size:26px;font-weight:700;cursor:pointer;transition:transform .05s ease}.num:hover{border-color:var(--line-thick)}.num:active{transform:scale(.96)}.num.swatch{border-color:var(--line)}.actions{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.actions button{background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:12px;font-size:14px;font-weight:700;cursor:pointer}.actions button:hover:not(:disabled){border-color:var(--line-thick)}.actions button:disabled{opacity:.4;cursor:default}.tips{color:var(--muted);font-size:12.5px;line-height:1.7;text-align:center}kbd{background:var(--panel-2);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 6px;font-family:var(--font);font-size:11px;font-weight:700;color:var(--text)}.rule-hint{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:9px 14px;color:var(--muted);font-size:13px;font-weight:600;text-align:center}.board .thermo-line{fill:none;stroke:#7e8aa69e;stroke-width:15;stroke-linejoin:round;stroke-linecap:round}.board .thermo-bulb{fill:#7e8aa69e}.board .whisper-line{fill:none;stroke:#34d39999;stroke-width:9;stroke-linejoin:round;stroke-linecap:round}.board .arrow-line,.board .arrow-head{fill:none;stroke:#a0acc7d9;stroke-width:3;stroke-linejoin:round;stroke-linecap:round}.board .arrow-bulb{fill:none;stroke:#a0acc7d9;stroke-width:3}.board .cage-line{stroke:#bec8e0d9;stroke-width:1.6;stroke-dasharray:5 4}.board .cage-sum{fill:var(--text);font-size:13px;font-weight:800;text-anchor:start;dominant-baseline:hanging;paint-order:stroke;stroke:var(--panel);stroke-width:3px;stroke-linejoin:round}.board .kropki-black{fill:#10151f;stroke:#e8edf7;stroke-width:1.6}.board .kropki-white{fill:#e8edf7;stroke:#10151f;stroke-width:1.6}@media (min-width: 900px){.app{max-width:940px}.playfield{flex-direction:row;align-items:flex-start}.board-wrap{flex:0 0 560px;width:560px;height:560px}.controls{flex:1;padding-top:4px}.numpad .num{font-size:30px}}