:root{--color-primary: #4f46e5;--color-primary-dark: #4338ca;--color-secondary: #06b6d4;--color-success: #10b981;--color-warning: #f59e0b;--color-error: #ef4444;--color-bg: #ffffff;--color-bg-secondary: #f3f4f6;--color-bg-tertiary: #e5e7eb;--color-text: #111827;--color-text-secondary: #6b7280;--color-text-tertiary: #9ca3af;--color-border: #d1d5db;--color-border-light: #e5e7eb;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1);--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease;--z-dropdown: 1000;--z-modal: 2000;--z-tooltip: 3000}@media (prefers-color-scheme: dark){:root{--color-bg: #111827;--color-bg-secondary: #1f2937;--color-bg-tertiary: #374151;--color-text: #f9fafb;--color-text-secondary: #d1d5db;--color-text-tertiary: #9ca3af;--color-border: #4b5563;--color-border-light: #374151}}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--color-bg);color:var(--color-text);font-size:16px;line-height:1.5}#root{min-height:100%;display:flex;flex-direction:column}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;margin-bottom:var(--spacing-md)}h1{font-size:2.25rem}h2{font-size:1.875rem}h3{font-size:1.5rem}h4{font-size:1.25rem}p{margin-bottom:var(--spacing-md)}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-dark);text-decoration:underline}button{font-family:inherit;font-size:1rem;font-weight:500;line-height:1.5;padding:var(--spacing-sm) var(--spacing-lg);border:2px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);background-color:var(--color-primary);color:#fff;box-shadow:0 2px 6px #0000001a}button:hover:not(:disabled){transform:scale(1.05);border-color:#667eea;box-shadow:0 2px 6px #0000001a}button:active:not(:disabled){transform:scale(.98);box-shadow:0 2px 6px #0000001a}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{background-color:var(--color-bg-secondary);color:var(--color-text);border:2px solid transparent;box-shadow:0 2px 6px #0000001a}button.secondary:hover:not(:disabled){transform:scale(1.05);border-color:#667eea;box-shadow:0 2px 6px #0000001a}button.secondary:active:not(:disabled){transform:scale(.98);box-shadow:0 2px 6px #0000001a}button.danger{background-color:var(--color-error)}button.danger:hover:not(:disabled){background-color:#dc2626}input,select,textarea{font-family:inherit;font-size:1rem;padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-bg);color:var(--color-text);transition:border-color var(--transition-fast)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #4f46e51a}.spinner{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-lg)}.card{background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-sm)}.game-ui-container{width:100%;height:100%;min-height:0;display:flex;align-items:stretch;overflow:hidden}.game-ui-container>*{width:100%;height:100%;flex:1}.error-message{color:var(--color-error);background-color:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius-md);padding:var(--spacing-md);margin:var(--spacing-md) 0}.success-message{color:var(--color-success);background-color:#f0fdf4;border:1px solid #bbf7d0;border-radius:var(--radius-md);padding:var(--spacing-md);margin:var(--spacing-md) 0}.loading{display:flex;justify-content:center;align-items:center;padding:var(--spacing-xl)}