.controls-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    border: 2px solid #ffffff;
    border-radius: 10px;
    padding: 20px;
    color: white;
    font-family: Arial, sans-serif;
    z-index: 1000;
    max-width: 80%;
    max-height: 80vh;
    overflow-y: auto;
}

.close-button {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    padding: 5px 10px;
}

.close-button:hover {
    color: #ff4444;
}

.controls-popup h2 {
    margin-top: 0;
    margin-bottom: 15px;
}

.controls-popup p {
    margin: 10px 0;
    line-height: 1.4;
}