body {
    /* Matrix-style dark background */
    background-color: #000; 
    color: #0f0; /* Matrix green text */
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
    padding: 20px;
}

h1 {
    color: #0c0;
    margin-bottom: 20px;
    /* Add a subtle text shadow for a glow effect */
    text-shadow: 0 0 5px #0f0; 
}

/* Style for controls */
#controls {
    margin-bottom: 15px;
    color: #0f0;
}

button, input[type="number"] {
    padding: 5px 10px;
    margin: 0 5px;
    border: 1px solid #0f0;
    background-color: #0a01; /* Semi-transparent background */
    color: #0f0;
    font-family: 'Consolas', monospace;
}

hr {
    width: 80%;
    border-color: #050;
    margin: 15px 0;
}

/* CRITICAL STYLING FOR ASCII OUTPUT */
#ascii-output {
    /* CRITICAL: Use a fixed-width font for perfect character alignment */
    font-family: 'Consolas', 'Courier New', monospace; 
    
    /* Font size is dynamically set by JavaScript, but this is a reasonable default */
    font-size: 5px; 
    
    /* CRITICAL: Reduce line height to eliminate vertical gaps between characters */
    line-height: 0.9; 
    
    /* ESSENTIAL: Preserve whitespace and layout */
    white-space: pre; 
    
    margin: 0;
    padding: 10px;
    border: 1px solid #050;
    background-color: #000;
}