*{margin-right: auto;margin-left: auto}body{font-family: sans-serif;color: white;background: black;margin: 2em;text-align: center}button{background: white;border-color: black;border-style: solid;border-radius: 4px;cursor: pointer;transition-duration: 0.2s}.tabButton{font-size: 20px;font-weight: bold;height: 40px;margin: 0 4px;border-radius: 8px;padding: 0 12px}.optionsButton{width: 150px;height: 150px;font-size: 16px;border-radius: 8px}.upgradeButton{width: 200px;height: 100px;border-radius: 8px}.locked{color: black !important;background: white !important;border-color: black !important;cursor: not-allowed}.bought{color: black !important;background: lime !important;border-color: black !important;cursor: default}.prestigeButton{font-size: 16px;padding: 4px 8px}.challenge{width: 300px;height: 150px;border-radius: 8px}.running{color: black !important;background: white !important;border-color: black !important}.cursorDefault{cursor: default !important}.cursorPointer{cursor: pointer !important}.cursorNotAllowed{cursor: not-allowed !important}.exponentButton{background: #E0E0E0;border-color: #4980CC}.exponentButton:hover{color: white;background: #4980CC}