/* ===== Background Animation ===== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.dna-strand {
    position: absolute;
    width: 4px;
    height: 200px;
    background: linear-gradient(180deg, 
        transparent 0%,
        var(--accent) 20%,
        var(--gradient-end) 50%,
        var(--accent) 80%,
        transparent 100%
    );
    opacity: 0.15;
    border-radius: 2px;
    animation: floatDNA 20s ease-in-out infinite;
}

.strand-1 {
    left: 10%;
    top: -100px;
    animation-delay: 0s;
}

.strand-2 {
    left: 50%;
    top: -150px;
    animation-delay: -7s;
    height: 300px;
}

.strand-3 {
    right: 15%;
    top: -80px;
    animation-delay: -14s;
}

@keyframes floatDNA {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.1;
    }
    25% {
        opacity: 0.2;
    }
    50% {
        transform: translateY(120vh) rotate(180deg);
        opacity: 0.15;
    }
    75% {
        opacity: 0.2;
    }
}

.cell {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, 
        var(--accent-glow) 0%,
        transparent 70%
    );
    border: 1px solid rgba(167, 139, 250, 0.2);
    opacity: 0.4;
    animation: floatCell 25s ease-in-out infinite;
}

.cell-1 {
    width: 100px;
    height: 100px;
    right: 5%;
    top: 20%;
    animation-delay: 0s;
}

.cell-2 {
    width: 60px;
    height: 60px;
    left: 3%;
    top: 60%;
    animation-delay: -8s;
}

.cell-3 {
    width: 80px;
    height: 80px;
    right: 20%;
    bottom: 10%;
    animation-delay: -16s;
}

@keyframes floatCell {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -20px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 30px) scale(0.95);
    }
    75% {
        transform: translate(20px, 20px) scale(1.05);
    }
}