* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    font-size: 16px;
}

/* Mobile-specific optimizations */
@media (max-width: 768px) {
    html, body {
        font-size: 14px;
        width: 100%;
        height: 100vh;
        overflow: hidden;
    }
}

/* Prevent zoom on double tap and improve touch handling */
@media (max-width: 768px) {
    * {
        touch-action: manipulation;
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    canvas {
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
    }
}