.spinner{border-radius:50%;animation:1s linear infinite spin}.spinner-small{width:20px;height:20px}.spinner-medium{width:40px;height:40px}.spinner-large{width:60px;height:60px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.btn{cursor:pointer;border:1px solid #0000;border-radius:4px;justify-content:center;align-items:center;gap:8px;padding:8px 16px;font-family:monospace;font-size:14px;font-weight:700;text-decoration:none;transition:all .2s ease-in-out;display:inline-flex}.btn:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{color:#fff;background-color:#4a90e2;border-color:#4a90e2}.btn-primary:hover:not(:disabled){background-color:#357bd8;border-color:#357bd8}.btn-secondary{color:#fff;background-color:#6c757d;border-color:#6c757d}.btn-secondary:hover:not(:disabled){background-color:#5a6268;border-color:#5a6268}.btn-danger{color:#fff;background-color:#dc3545;border-color:#dc3545}.btn-danger:hover:not(:disabled){background-color:#c82333;border-color:#c82333}.btn-warning{color:#333;background-color:#ffc107;border-color:#ffc107}.btn-warning:hover:not(:disabled){background-color:#e0a800;border-color:#e0a800}.btn-info{color:#fff;background-color:#17a2b8;border-color:#17a2b8}.btn-info:hover:not(:disabled){background-color:#138496;border-color:#138496}.btn-success{color:#fff;background-color:#28a745;border-color:#28a745}.btn-success:hover:not(:disabled){background-color:#218838;border-color:#218838}.btn-small{padding:5px 10px;font-size:12px}.btn-medium{padding:8px 16px;font-size:14px}.btn-large{padding:12px 24px;font-size:16px}.game-ui-button-container .btn{width:100%;margin-top:6px}.round-btn{color:#fff;background-color:#000000d9;border:2px solid #ffffff4d;border-radius:50%;justify-content:center;align-items:center;padding:0;display:flex}.chat-close-btn{color:#fff;background:0 0;border:none;width:20px;height:20px;padding:0;font-size:1.2rem}.chat-close-btn:hover{opacity:.7}.quality-setting-button{text-align:left;width:100%;margin:4px 0;display:block}.quality-settings-toggle-button{color:#fff;background-color:#000000b3;border:1px solid #555;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;padding:0;font-size:20px;display:flex}.quality-settings-toggle-button:hover{transform:scale(1.1)}.error-boundary{color:#fff;text-align:center;background-color:#1a1a1a;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100vh;padding:20px;display:flex}.error-boundary-icon{margin-bottom:20px;font-size:48px}.error-boundary-title{margin-bottom:10px}.error-boundary-message{opacity:.7;margin-bottom:20px}