71 lines (63 with data), 1.6 kB

/* DNA Helix Animation */
.dna-helix {
    position: relative;
    width: 200px;
    height: 400px;
    margin: 0 auto;
    perspective: 1200px;
    transform-style: preserve-3d;
}

.base-pair {
    position: absolute;
    width: 100%;
    height: 20px;
    animation: rotate 8s linear infinite;
    transform-style: preserve-3d;
}

.base {
    position: absolute;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    text-shadow: 0 0 3px rgba(0,0,0,0.5);
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
}

.left-base {
    left: 35px;
    background: #FF0066;
    animation: pulse 3s ease-in-out infinite;
    filter: brightness(1.1);
}

.right-base {
    right: 35px;
    background: #00B7FF;
    animation: pulse 3s ease-in-out infinite;
    filter: brightness(1.1);
}

.base-connector {
    position: absolute;
    left: 50%;
    width: 90px;
    height: 3px;
    background: linear-gradient(90deg, 
        rgba(255, 0, 102, 0.8), 
        rgba(255, 255, 255, 0.3) 50%,
        rgba(0, 183, 255, 0.8)
    );
    transform: translateX(-50%);
    box-shadow: 0 0 8px rgba(0,0,0,0.15);
}

@keyframes rotate {
    0% { transform: rotateY(0deg) translateZ(20px); }
    100% { transform: rotateY(360deg) translateZ(20px); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.9; filter: brightness(1.1); }
    50% { transform: scale(1.15); opacity: 1; filter: brightness(1.3); }
    100% { transform: scale(1); opacity: 0.9; filter: brightness(1.1); }
}