SOURCE

<link href="https://fonts.googleapis.com/css2?family=Orbitron:wght@600&display=swap" rel="stylesheet">

<button class="noselect"><div>Boxed</div></button>

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	height: 100vh;
	overflow: hidden;
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: #fff000;
	background-image: linear-gradient(315deg, #fff000 0%, #ed008c 74%);
}

.noselect {
  -webkit-touch-callout: none;
    -webkit-user-select: none;
     -khtml-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;
		-webkit-tap-highlight-color: transparent;
}

button {
	width: 150px;
	height: 50px;
	cursor: pointer;
	background: black;
	border: none;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 5px 0 8px 5px;
	box-shadow: -8px 8px 5px rgba(0,0,0,0.5);
	transition: 500ms;
	font-family: 'Orbitron', sans-serif;
	font-size: 16px;
}

button div {
	width: 142px;
	height: 42px;
	background: white;
	display: flex;
	align-items: center;
	justify-content: center;
}

button:before {
	height: 42px;
	width: 5px;
	border: 4px solid black;
	background: #ddd;
	content: '';
	position: absolute;
	transform: skewY(-30deg) translateX(-78px) translateY(-42px);
}

button:after {
	width: 135px;
	height: 3px;
	border: 4px solid black;
	background: #bbb;
	content: '';
	position: absolute;
	transform: skewX(-55deg) translateY(26px) translateX(32px)
}

button:focus {
	outline: none;
}

button:hover {
	transform: translateX(5px) translateY(-5px);
	box-shadow: -15px 15px 5px rgba(0,0,0,0.5);
}