CSS Animation Pulse Example

<!doctype html>
<title>Example</title>
<style>
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: sans-serif;
    background-color: #f0f0f0;
}

.pulse-button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.7);
    }
    
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 15px rgba(0, 123, 255, 0);
    }
    
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0);
    }
}

/* Accessibility: Disable animation for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    .pulse-button {
        animation: none;
    }
}
</style>
<button class="pulse-button">Click Me</button>