body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f9;
    margin: 0;
    overflow: hidden;
}

.container {
    text-align: center;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
    max-width: 400px;
    display: inline-block;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 5px;
    margin: 10px 0;
    transition: background-color 0.3s ease;
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
    opacity: 0.5;
}

#clickButton {
    font-size: 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
}

.upgrade {
    background-color: #ff9800;
    color: white;
    border: none;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
}

#bonusCoinsContainer {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 1;
}

.bonusCoin {
    position: absolute;
    background: gold;
    border-radius: 50%;
    padding: 10px;
    cursor: pointer;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
}