css button styles

                                    <div>
    <style scoped="">
        .button-success,
        .button-error,
        .button-warning,
        .button-secondary {
            color: white;
            border-radius: 4px;
            text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
        }

        .button-success {
            background: rgb(28, 184, 65);
            /* this is a green */
        }

        .button-error {
            background: rgb(202, 60, 60);
            /* this is a maroon */
        }

        .button-warning {
            background: rgb(223, 117, 20);
            /* this is an orange */
        }

        .button-secondary {
            background: rgb(66, 184, 221);
            /* this is a light blue */
        }
    </style>
    <button class="button-success pure-button">Success Button</button>
    <button class="button-error pure-button">Error Button</button>
    <button class="button-warning pure-button">Warning Button</button>
    <button class="button-secondary pure-button">Secondary Button</button>
</div>

                                    .button {
    font-size: 16px;
    letter-spacing: 2px;
    font-weight: 400 !important;
    background-color: #e63946ff;
    color: #fff;
    padding: 23px 50px;
    margin: auto;
    text-align: center;
    display: inline-block !important;
    text-decoration: none;
    border: 0px;
    width: max-content;
    cursor: pointer;
    transition: all 0.3s 0s ease-in-out;
}

.button:hover {
    transform: scale(1.04, 1);
    background-color: rgb(216, 10, 27);
    text-decoration: none;
}

/* add extra functionality in button*/


/*button sizes*/
.btn_sm {
    padding: 17px 40px !important;
}

.btn_md {
    padding: 20px 50px !important;
}

.btn_lg {
    padding: 23px 60px !important;
}


/*make your button block level*/
.btn_block {
    width: 100% !important;
    padding: 22px 30px !important;
}

                                    .button {

	background-color: orange;
  	padding: 2px;
  	border: none;
  	opacity: 0.6;
  
}

.button:hover{
  background-color: cyan;
  opacity: 1;
}

                                    <a href="#" class="myButton">green</a>

.myButton {
	background-color:#44c767;
	border-radius:28px;
	border:1px solid #18ab29;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	font-family:Arial;
	font-size:17px;
	padding:16px 31px;
	text-decoration:none;
	text-shadow:0px 1px 0px #2f6627;
}
.myButton:hover {
	background-color:#5cbf2a;
}
.myButton:active {
	position:relative;
	top:1px;
}

                                    <button style="background-color: turquoise; border: none; border-radius: 5px; color: #333; /* Dark grey */ padding: 15px 32px">Example button</button>