:root{--bg-color: #0a0e17;--panel-bg: #141a27;--cell-bg: #1a2030;--cell-hover: #c9a84c;--cell-selected: #e8b730;--text-color: #c8cdd8;--text-secondary: rgba(200, 205, 216, .55);--button-bg: #1e2640;--button-hover: #c9a84c;--button-text: #0a0e17;--border-color: #252d3f;--accent-color: #c9a84c;--link-color: #e8b730;--score-color: #f0c040;--particle-color: #c9a84c;--grid-line-color: #1a2535;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 20px;--shadow-sm: 0 1px 3px rgba(0,0,0,.2);--shadow-md: 0 4px 16px rgba(0,0,0,.25);--shadow-lg: 0 8px 40px rgba(0,0,0,.35);--shadow-canvas: 0 2px 12px rgba(0,0,0,.15);--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .35s ease;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono: "SF Mono", "Fira Code", "Consolas", monospace}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%;overflow:hidden}body{background:var(--bg-color);color:var(--text-color);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background var(--transition-normal)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--accent-color)}::selection{background:var(--accent-color);color:var(--button-text)}:focus-visible{outline:2px solid var(--accent-color);outline-offset:2px}.app-root{width:100vw;height:100vh;display:flex;flex-direction:column;overflow:hidden}.app-header{height:44px;display:flex;align-items:center;padding:0 var(--space-md);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);flex-shrink:0;z-index:10}.app-header h1{font-size:16px;font-weight:700;letter-spacing:.5px}.app-main{flex:1;display:flex;align-items:flex-start;justify-content:center;padding:var(--space-lg);gap:var(--space-lg);overflow:auto;min-height:0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:7px 16px;border:none;border-radius:var(--radius-sm);cursor:pointer;font-size:13px;font-weight:600;font-family:var(--font-sans);transition:all var(--transition-normal);-webkit-user-select:none;user-select:none;white-space:nowrap}.btn:hover{filter:brightness(1.12);transform:translateY(-1px)}.btn:active{transform:translateY(0) scale(.97)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;filter:none}.btn-primary{background:var(--accent-color);color:var(--button-text)}.btn-primary:hover{box-shadow:0 4px 12px #0003}.btn-secondary{background:var(--cell-bg);color:var(--text-color);border:1px solid var(--border-color)}.btn-secondary:hover{border-color:var(--accent-color)}.btn-sm{padding:4px 10px;font-size:12px}.card{background:var(--panel-bg);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--space-md)}.select-native{width:100%;padding:6px 28px 6px 8px;background:var(--cell-bg);color:var(--text-color);border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:13px;font-family:var(--font-sans);cursor:pointer;transition:border-color var(--transition-fast);-moz-appearance:none;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center}.select-native:focus{outline:none;border-color:var(--accent-color)}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:5px;border-radius:3px;background:var(--border-color);outline:none;cursor:pointer}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent-color);cursor:pointer;transition:transform var(--transition-fast);box-shadow:0 2px 6px #0003}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}input[type=checkbox]{accent-color:var(--accent-color);cursor:pointer}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);z-index:200;display:flex;align-items:center;justify-content:center;animation:modalFadeIn .25s ease}.modal-card{background:var(--panel-bg);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--space-xl);box-shadow:var(--shadow-lg);animation:modalSlideUp .35s ease}@keyframes modalFadeIn{0%{opacity:0}to{opacity:1}}@keyframes modalSlideUp{0%{opacity:0;transform:translateY(16px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.game-canvas{border-radius:var(--radius-md);box-shadow:0 2px 16px #0000001f;cursor:pointer;display:block;flex-shrink:0;transition:box-shadow var(--transition-normal)}.file-upload-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:7px 12px;border-radius:var(--radius-sm);font-size:13px;font-weight:600;font-family:var(--font-sans);cursor:pointer;-webkit-user-select:none;user-select:none;transition:all var(--transition-normal);position:relative}.file-upload-btn:hover{border-color:var(--accent-color)!important;transform:translateY(-1px);box-shadow:0 4px 12px #0000001f}.file-upload-btn:active{transform:translateY(0) scale(.97)}.file-upload-input{position:absolute;width:0;height:0;opacity:0;pointer-events:none}.file-upload-btn svg{flex-shrink:0;opacity:.75}@keyframes fileUploadSpin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.file-upload-spinner{animation:fileUploadSpin .8s linear infinite;flex-shrink:0}.file-upload-badge{position:absolute;top:-6px;right:-6px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--accent-color);color:var(--button-text);font-size:10px;font-weight:700;line-height:18px;text-align:center;box-shadow:0 1px 4px #0003;pointer-events:none}.section-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:1px;opacity:.45;margin-bottom:6px}