/* --- IMMERSIVE BACKGROUND SYSTEM --- */
.fx-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    background: 
        radial-gradient(circle at 50% 50%, rgba(212, 175, 55, 0.06) 0%, transparent 60%), 
        radial-gradient(circle at 20% 30%, rgba(239, 83, 80, 0.03) 0%, transparent 40%),  
        radial-gradient(circle at 80% 70%, rgba(38, 166, 154, 0.03) 0%, transparent 40%),  
        linear-gradient(180deg, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.6) 100%); 
}

.fx-wrapper::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background-image: 
        linear-gradient(rgba(212, 175, 55, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(212, 175, 55, 0.01) 1px, transparent 1px);
    background-size: 60px 60px;
    transform: perspective(500px) rotateX(60deg);
    animation: gridMove 30s linear infinite;
}

/* --- LOGO.PNG WATERMARK --- */
.logo-png-watermark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    pointer-events: none;
    opacity: 0.25;
    animation: logoBreathe 7s ease-in-out infinite;
}

.logo-png-watermark img {
    width: min(420px, 70vw);
    height: auto;
    filter: brightness(0.5) contrast(1.3) saturate(0.5);
}

@keyframes gridMove {
    0% { background-position: 0 0; }
    100% { background-position: 0 60px; }
}

@keyframes logoBreathe {
    0%, 100% {
        opacity: 0.25;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.38;
        transform: translate(-50%, -50%) scale(1.04);
    }
}