body, html {
        margin: 0;
        padding: 0;
        overflow: hidden;
        background-color: #000; /* Default background changed to black */
        width: 100%;
        height: 100%;
    }
    canvas {
        display: block;
        position: absolute;
        top: 0;
        left: 0;
        z-index: 0;
    }
    .controls {
        position: absolute;
        top: 40px; /* Adjusted top position to be below the toggle button */
        left: 10px;
        background-color: rgba(50, 50, 50, 0.8);
        padding: 15px;
        border-radius: 8px;
        color: white;
        font-family: sans-serif;
        z-index: 1;
        max-height: calc(100vh - 50px); /* Adjusted max-height based on new top position */
        overflow-y: auto;
        transition: transform 0.3s ease-in-out; /* Added transition for smooth hide/show */
    }
    .controls.hidden {
        /* Calculate position to move off-screen based on its width */
        transform: translateX(calc(-100% - 20px));
    }
     .top-buttons { /* Container for toggle and help buttons */
        position: absolute;
        top: 10px; /* Keep buttons at the top */
        left: 10px;
        z-index: 2; /* Ensure buttons are above canvas and controls */
        font-family: sans-serif;
     }
     .top-buttons button {
        background-color: rgba(50, 50, 50, 0.8);
        color: white;
        border: none;
        padding: 5px 10px;
        border-radius: 4px;
        cursor: pointer;
        margin-right: 5px; /* Space between buttons */
     }
    .controls label, .controls input, .controls select, .controls button {
        display: block;
        margin-bottom: 8px;
    }
    .controls input[type="range"] {
        width: 150px;
    }
    .controls input[type="number"] {
        width: 70px;
    }
    .controls h3 {
        margin-top: 0;
        margin-bottom: 10px;
        border-bottom: 1px solid #fff;
        padding-bottom: 5px;
    }
    .control-group {
        margin-bottom: 15px;
        padding: 10px;
        border: 1px solid #777;
        border-radius: 4px;
    }
    #status {
        margin-top: 10px;
        font-weight: bold;
    }

    /* Help Overlay Styles */
    .help-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.7); /* Dim background */
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 10; /* Above everything else */
        visibility: hidden; /* Hidden by default */
        opacity: 0;
        transition: opacity 0.3s ease-in-out;
    }

    .help-overlay.visible {
        visibility: visible;
        opacity: 1;
    }

    .help-content {
        background-color: rgba(50, 50, 50, 0.95);
        color: white;
        padding: 20px;
        border-radius: 8px;
        max-width: 80%;
        max-height: 80%;
        overflow-y: auto; /* Enable scrolling for content */
        position: relative;
    }

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


.copyright{text-align:center; width:100%;margin-top:20px;}
.copyright a{ color:#aaa;}