html, body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0f172a; /* Dark theme background */
    overflow: hidden; /* Prevents scrollbars on the main window */
}

/* Base CSS variables for our POS colors */
:root {
    --primary-color: #10b981;
    --surface-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: #9ca3af;
}