.upgrade-menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50%;
    max-width: 400px;
    max-height: 250px; /* Smaller height */
    background: var(--text-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    font-family: sans-serif;
    color: var(--text-color);
    z-index: 2000;
    box-shadow: 0 4px 8px rgba(0,0,0,0.5);
    overflow-y: auto; /* Enable scrolling if needed */
  }
  
  .upgrade-menu h2 {
    margin: 0 0 8px;
    font-size: 1.2em;
    text-align: center;
  }
  
  .upgrade-menu p {
    margin: 0 0 15px;
    font-size: 0.9em;
    text-align: center;
  }
  
  .upgrade-menu .upgrade-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.9em;
  }
  
  .upgrade-menu .upgrade-option span {
    flex: 1;
  }
  
  .upgrade-menu button {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 5px 8px;
    cursor: pointer;
    font-size: 0.9em;
    color: var(--text-color);
    margin: 0 5px;
    transition: background 0.2s;
  }
  
  .upgrade-menu button:hover {
    background: var(--button-hover);
  }