:root{--bg: #2b2a33;--card: #36353f;--card-border: #4a4955;--text: #f4efe6;--muted: #b9b3a8;--accent: #f2b84b;--accent-text: #2b2a33;--danger: #ff8f7a;color-scheme:dark;font-family:system-ui,-apple-system,Hiragino Sans,Yu Gothic UI,Meiryo,sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;background:var(--bg);color:var(--text)}body{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;overscroll-behavior:none}button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--card-border);background:var(--card);border-radius:12px;padding:10px 16px;min-height:44px;touch-action:manipulation}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);color:var(--accent-text);border-color:var(--accent);font-weight:700}button.link{background:none;border:none;color:var(--muted);text-decoration:underline}.start{max-width:720px;margin:0 auto;padding:24px 16px 48px;height:100%;overflow-y:auto;-webkit-overflow-scrolling:touch}.start-header{text-align:center;margin-bottom:16px}.start-header h1{margin:0;font-size:44px;letter-spacing:.08em;color:var(--accent)}.start-header p{margin:4px 0 0;color:var(--muted)}.card{background:var(--card);border:1px solid var(--card-border);border-radius:16px;padding:16px;margin-bottom:14px}.card h2{margin:0 0 12px;font-size:18px}.continue{display:flex;gap:16px;align-items:center}.continue img{width:160px;aspect-ratio:7 / 5;object-fit:cover;border-radius:8px;flex-shrink:0}.continue p{margin:0 0 10px;color:var(--muted)}.photo-picker{width:100%;aspect-ratio:7 / 5;max-height:320px;padding:0;overflow:hidden;display:flex;align-items:center;justify-content:center;border-style:dashed;border-width:2px;background:#2f2e37;color:var(--muted);font-size:18px}.photo-picker img{width:100%;height:100%;object-fit:cover}.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px}.choice{display:flex;flex-direction:column;align-items:center;gap:2px;padding:14px 10px}.choice small{color:var(--muted)}.choice.selected{border:2px solid var(--accent);background:#4a4232}.start-button{width:100%;font-size:20px;min-height:56px;margin-top:4px}.hint{margin:8px 0 0;color:var(--muted);font-size:14px}.hint.center{text-align:center}.error{color:var(--danger)}.howto{margin-top:24px;color:var(--muted);font-size:15px}.howto h2{font-size:16px;margin:0 0 6px}.howto ul{margin:0;padding-left:1.2em;line-height:1.7}.play{height:100%;display:flex;flex-direction:column}.hud{position:relative;height:52px;flex-shrink:0;display:flex;align-items:center;gap:8px;padding:4px max(8px,env(safe-area-inset-right)) 4px max(8px,env(safe-area-inset-left));border-bottom:1px solid #3d3c47}.hud-button{min-height:40px;padding:6px 14px}.hud-status{flex:1;display:flex;justify-content:center;gap:20px;font-size:16px;white-space:nowrap}.hud-status strong{color:var(--accent);font-size:20px}.hud-time{font-variant-numeric:tabular-nums}.menu-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10}.menu{position:absolute;top:50px;left:8px;z-index:11;display:flex;flex-direction:column;gap:6px;padding:8px;background:var(--card);border:1px solid var(--card-border);border-radius:14px;box-shadow:0 8px 24px #0006}.menu button{text-align:left;display:flex;flex-direction:column}.menu small{color:var(--muted);font-size:12px}.board{flex:1;min-height:0;position:relative}.board canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block;touch-action:none}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;align-items:center;justify-content:center;background:#00000073;padding:16px}.dialog{background:var(--card);border:1px solid var(--card-border);border-radius:18px;padding:24px;text-align:center;max-width:420px;width:100%}.dialog.clear h2{margin:0 0 6px;font-size:36px;color:var(--accent)}.dialog p{margin:0 0 18px;font-size:18px}.dialog-buttons{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:8px}