:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--page-bg:#111827;--surface:#1f2937;--surface-2:#374151;--surface-3:#4b5563;--text:#f9fafb;--muted:#9ca3af;--border:#4b5563;--primary:#3b82f6;--primary-hover:#2563eb;--primary-active:#1d4ed8;--danger:#991b1b;--input-bg:#1f2937;--nurikabe-grid:#64748b;--nurikabe-strong-border:#64748b;--nurikabe-unknown-bg:#1f2937;--nurikabe-wall-bg:#05070b;--nurikabe-island-bg:#374151;--nurikabe-island-text:#f9fafb;--nurikabe-clue-bg:#374151;--nurikabe-clue-text:#f9fafb;--nurikabe-error:#991b1b;--nurikabe-error-border:#7f1d1d;--nurikabe-error-soft:#7f1d1d3d;--nurikabe-error-cell:#991b1b47}:root[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--page-bg:#fff;--surface:#f9fafb;--surface-2:#f3f4f6;--surface-3:#e5e7eb;--text:#111827;--muted:#6b7280;--border:#d1d5db;--primary:#3b82f6;--primary-hover:#2563eb;--primary-active:#1d4ed8;--danger:#b91c1c;--input-bg:#fff;--nurikabe-grid:#000;--nurikabe-strong-border:#000;--nurikabe-unknown-bg:#fff;--nurikabe-wall-bg:#111827;--nurikabe-island-bg:#f3f4f6;--nurikabe-island-text:#111827;--nurikabe-clue-bg:#f3f4f6;--nurikabe-clue-text:#111827;--nurikabe-error:#b91c1c;--nurikabe-error-border:#991b1b;--nurikabe-error-soft:#b91c1c1c;--nurikabe-error-cell:#b91c1c24}*{box-sizing:border-box}body{background:var(--page-bg);color:var(--text);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,select,input,textarea{font:inherit;color:inherit}button{background:var(--primary);color:#fff;cursor:pointer;border:1px solid #0000;border-radius:6px;min-height:40px;padding:8px 16px;font-size:.875rem;font-weight:500;transition:background .15s,border-color .15s,opacity .15s}button:hover:not(:disabled){background:var(--primary-hover)}button:active:not(:disabled){background:var(--primary-active)}button:disabled{opacity:.45;cursor:default}select,input,textarea{border:1px solid var(--border);background:var(--input-bg);color:var(--text);border-radius:6px}select,input{min-height:40px}.app{flex-direction:column;align-items:center;min-height:100vh;padding:24px 20px 48px;display:flex}.app-header{justify-content:space-between;align-items:center;gap:24px;width:min(720px,100%);margin-bottom:20px;display:flex}.app-header h1{margin:0;font-size:1.875rem;font-weight:700;line-height:2.25rem}.mode-tabs{justify-content:center;gap:8px;width:min(720px,100%);margin-bottom:28px;display:flex}.mode-tab{flex:1 1 0;max-width:220px}.mode-tab:not(.mode-tab-active){background:var(--surface-2);color:var(--text)}.mode-tab:not(.mode-tab-active):hover{background:var(--surface-3)}.mode-tab-active{background:var(--primary)}.app-view{justify-content:center;width:100%;display:flex}.app-view[hidden]{display:none}.theme-switch,.autosave-switch{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:10px;font-size:.875rem;font-weight:600;display:inline-flex}.theme-switch input,.autosave-switch input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}.switch-track{background:var(--surface-3);border-radius:9999px;flex:none;width:44px;height:24px;transition:background .15s;display:inline-block;position:relative}.switch-thumb{background:#fff;border-radius:9999px;width:18px;height:18px;transition:transform .15s;position:absolute;top:3px;left:3px;box-shadow:0 1px 2px #0000004d}.theme-switch input:checked+.switch-track,.autosave-switch input:checked+.switch-track{background:var(--primary)}.theme-switch input:checked+.switch-track .switch-thumb,.autosave-switch input:checked+.switch-track .switch-thumb{transform:translate(20px)}.generator-panel{flex-direction:column;gap:16px;width:min(560px,100%);display:flex}.generator-settings{grid-template-columns:1fr 1fr;gap:12px;display:grid}.generator-field{flex-direction:column;gap:6px;display:flex}.generator-field>span{font-size:.875rem;font-weight:600}.generator-field select,.generator-field input,.generator-field textarea{width:100%;padding:8px 12px}.generator-field textarea{resize:vertical;min-height:120px}.generator-status{color:var(--muted);margin:0;font-size:.875rem}.puzzle-solver,.nurikabe-game{flex-direction:column;align-items:center;width:100%;max-width:100%;display:flex}.nurikabe-meta{color:var(--muted);text-align:center;text-transform:capitalize;margin:0 0 16px;font-size:.875rem;font-weight:500}.nurikabe-toolbar{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-bottom:10px;display:flex}.nurikabe-toolbar-secondary{margin-bottom:16px}.nurikabe-timer-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-bottom:10px;display:flex}.nurikabe-timer{text-align:center;font-variant-numeric:tabular-nums;min-width:120px;font-size:.95rem;font-weight:700}.nurikabe-board{aspect-ratio:1;border:3px solid var(--nurikabe-strong-border);background:var(--nurikabe-grid);gap:1px;width:min(520px,100vw - 32px);display:grid}.nurikabe-cell{background:var(--nurikabe-unknown-bg);min-width:0;min-height:0;color:var(--text);-webkit-user-select:none;user-select:none;touch-action:manipulation;-webkit-touch-callout:none;border:0;border-radius:0;justify-content:center;align-items:center;padding:0;font-size:clamp(1rem,5vw,1.5rem);font-weight:700;display:flex;position:relative}.nurikabe-cell:hover:not(:disabled){filter:brightness(1.08);background:var(--nurikabe-unknown-bg)}.nurikabe-cell:disabled{opacity:1}.nurikabe-cell-wall,.nurikabe-cell-wall:hover:not(:disabled){background:var(--nurikabe-wall-bg)}.nurikabe-cell-island,.nurikabe-cell-island:hover:not(:disabled){background:var(--nurikabe-island-bg);color:var(--nurikabe-island-text)}.nurikabe-cell-island:after{content:"";opacity:.45;background:currentColor;border-radius:9999px;width:7px;height:7px}.nurikabe-cell-clue{background:var(--nurikabe-clue-bg);color:var(--nurikabe-clue-text)}.nurikabe-cell-error{z-index:2;box-shadow:inset 0 0 0 3px var(--nurikabe-error), inset 0 0 16px var(--nurikabe-error-cell)}.nurikabe-cell-error:before{content:"";border:1px solid var(--nurikabe-error-border);pointer-events:none;position:absolute;inset:4px}.nurikabe-cell-clue.nurikabe-cell-error,.nurikabe-cell-wall.nurikabe-cell-error,.nurikabe-cell-island.nurikabe-cell-error{box-shadow:inset 0 0 0 3px var(--nurikabe-error), inset 0 0 16px var(--nurikabe-error-cell)}.nurikabe-help{max-width:600px;color:var(--muted);text-align:center;margin-top:12px;font-size:.875rem;line-height:1.25rem}.nurikabe-help-touch{margin-top:4px;display:none}.nurikabe-status{text-align:center;margin:12px 0 0;font-size:.875rem;font-weight:600}.nurikabe-errors{border:1px solid var(--nurikabe-error-border);background:var(--nurikabe-error-soft);width:min(600px,100%);color:var(--text);border-radius:6px;margin:10px 0 0;padding:12px 16px 12px 34px;font-size:.875rem;line-height:1.4rem}.nurikabe-errors li+li{margin-top:4px}.puzzle-message{border:1px solid var(--border);background:var(--surface);border-radius:6px;width:min(600px,100%);margin-top:24px;padding:20px}.puzzle-message p{white-space:pre-wrap;overflow-wrap:anywhere;margin:0}@media (width<=768px),(hover:none) and (pointer:coarse){.app{padding:16px 12px 36px}.app-header{flex-direction:column;align-items:flex-start}.mode-tabs{flex-direction:column;align-items:stretch;margin-bottom:20px}.mode-tab{max-width:none}.generator-settings{grid-template-columns:1fr}.nurikabe-board{width:min(520px,100vw - 24px)}.nurikabe-help-touch{display:block}}.generated-puzzle{flex-direction:column;gap:12px;display:flex}.generated-puzzle-actions{flex-wrap:wrap;gap:8px;display:flex}.generated-puzzle-actions button{flex:1 1 0}