.pulse-background {
    animation: pulseBg 20s infinite alternate ease-in-out;
}

@keyframes pulseBg {
    from { background-position: top left; }
    to { background-position: bottom right; }
}

.card-float {
    animation: floatUp 8s ease-in-out infinite;
}

@keyframes floatUp {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.22);
    pointer-events: none;
    transform: scale(0);
    opacity: 0.8;
}

.ripple.expand {
    animation: rippleExpand 0.75s ease-out forwards;
}

@keyframes rippleExpand {
    to {
        transform: scale(4);
        opacity: 0;
    }
}