body { margin: 0; padding: 0; display: flex; justify-content: center; align-items: center; height: 100vh; background-color: #f0f0f0; font-family: Arial, sans-serif; } .hidden { display: none; } #menu { text-align: center; } #game-container { position: relative; width: 80vw; height: 80vh; background-color: #fff; border: 2px solid #000; display: flex; flex-direction: column; justify-content: center; align-items: center; } #game-area { position: relative; width: 100%; height: 100%; } #target, .investment-option, .consumption-option { position: absolute; width: 50px; height: 50px; background-color: red; border-radius: 50%; cursor: pointer; } #score-board { position: absolute; top: 10px; left: 10px; font-size: 24px; font-weight: bold; } #back-button { position: absolute; bottom: 10px; left: 10px; }