:root {
    --bg-color: #000;
    --ui-bg: rgba(0, 0, 0, 0.8);
    --text-color: #eee;
    --accent-color: #00ff00;
    --font-family: 'Courier New', Courier, monospace;
}

body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: var(--bg-color);
    font-family: var(--font-family);
    color: var(--text-color);
}

canvas {
    display: block;
    /* Removes bottom margin/scrollbar */
}

.ui-overlay {
    position: absolute;
    top: 20px;
    left: 20px;
    background: var(--ui-bg);
    padding: 20px;
    border: 1px solid #333;
    border-radius: 8px;
    backdrop-filter: blur(5px);
    max-width: 300px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    transition: opacity 0.3s;
}

.ui-overlay:hover {
    opacity: 1;
}

.ui-hidden {
    opacity: 0;
    pointer-events: none;
}

h1 {
    font-size: 1.2rem;
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    font-size: 0.8rem;
    margin-bottom: 5px;
}

input[type="range"] {
    width: 100%;
    background: transparent;
    cursor: pointer;
}

/* Upload Button Styling */
input[type="file"] {
    display: none;
}

.upload-btn {
    display: inline-block;
    padding: 8px 12px;
    background: #333;
    border: 1px solid #555;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background 0.2s, color 0.2s;
    text-align: center;
    width: 100%;
    box-sizing: border-box;
}

.upload-btn:hover {
    background: var(--accent-color);
    color: #000;
    border-color: var(--accent-color);
}

input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
}