/* ✅ 04 — html Background (Vignette + Multi-Color Glow) */
html {
    background:
        radial-gradient(circle at 50% 50%, transparent 40%, rgba(0,0,0,.35) 100%),
        radial-gradient(circle at 10% 20%, rgba(5, 150, 105, 0.25) 0%, transparent 45%),
        radial-gradient(circle at 90% 80%, rgba(220, 38, 38, 0.20) 0%, transparent 45%),
        linear-gradient(135deg, #061224 0%, #0a192f 50%, #022c22 100%);
    background-attachment: fixed;
    min-height: 100%;
}