Neumorphic Button

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Neumorphic Button</title>
    <style>
        /*
         Component: Neumorphic Button
         Description: A button styled with the "soft UI" or neumorphism trend.
        */

:root {
            /* Neumorphism requires the background and element color to be the same */
            --neu-background-color: #e0e5ec;
            --neu-text-color: #4b5563; /* A soft gray for text */
            --neu-text-color-active: #007bff;
            --neu-shadow-offset: 6px;
            --neu-light-shadow-color: rgba(255, 255, 255, 0.9);
            --neu-dark-shadow-color: rgba(163, 177, 198, 0.6);
            --neu-focus-outline: #007bff;
        }

.neu-container-1 {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 250px;
            background-color: var(--neu-background-color);
        }

.neu-btn-1 {
            display: inline-block;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            
            color: var(--neu-text-color);
            background-color: var(--neu-background-color);
            
            border: none;
            border-radius: 12px;
            cursor: pointer;
            text-decoration: none;

/* Two shadows create the effect: a light one and a dark one */
            box-shadow: 
                calc(-1 * var(--neu-shadow-offset)) calc(-1 * var(--neu-shadow-offset)) calc(var(--neu-shadow-offset) * 2) var(--neu-light-shadow-color),
                var(--neu-shadow-offset) var(--neu-shadow-offset) calc(var(--neu-shadow-offset) * 2) var(--neu-dark-shadow-color);
            
            transition: box-shadow 0.15s ease, color 0.15s ease;
        }
        
        .neu-btn-1:active {
            /* 'inset' makes the shadows appear inside the button, creating the pressed effect */
            box-shadow: 
                inset calc(-1 * var(--neu-shadow-offset)) calc(-1 * var(--neu-shadow-offset)) calc(var(--neu-shadow-offset) * 2) var(--neu-light-shadow-color),
                inset var(--neu-shadow-offset) var(--neu-shadow-offset) calc(var(--neu-shadow-offset) * 2) var(--neu-dark-shadow-color);
            color: var(--neu-text-color-active);
        }
        
        .neu-btn-1:focus-visible {
            outline: 2px solid var(--neu-focus-outline);
            outline-offset: 4px;
        }
    </style>
</head>
<body>

<div class="neu-container-1">
        <button type="button" class="neu-btn-1">Toggle Setting</button>
    </div>

</body>
</html>