.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background-color: #f8f9fa;
}

.modern-gradient {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        135deg,
        rgba(230, 22, 45, 0.4) 0%,
        rgba(245, 80, 80, 0.3) 25%,
        rgba(250, 120, 110, 0.2) 50%,
        rgba(255, 140, 140, 0.3) 75%,
        rgba(255, 90, 90, 0.4) 100%
    );
    animation: gradient-flow 20s ease-in-out infinite;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
}

@keyframes rainbow-rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}