style.css

.center {
    text-align: center;
}
* {
	box-sizing: border-box;
}
body {
    background-color: rgb(232, 225, 222);
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
}

.container {
	background-color: #bcb9b9;
	border: 3px solid #660033;
	border-radius: 10px;
	box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.3);
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	padding: 30px 60px;
	text-align: center;
	width: 600px;
	max-width: 100%;
}

.center p {
	color: rgb(136, 136, 136);
	letter-spacing: 0.4px;
}

.center form {
	width: 100%;
}

.center .input-area {
    background-color: #bcb9b9;
	position: relative;
	margin: 10px 0;
	height: 70px;
	width: 500px;
}

.container .h-80 {
	height: 100px;
}

.center input, .center textarea {
    position: absolute;
	display: block;
	font-family: "Poppins", sans-serif;
	font-size: 14px;
	padding: 12px;
	height: 100%;
	width: 100%;
    border: 1px solid #bcb9b9;
    border-radius: 4px;
    outline: none;
    resize: none;
}

.center .sendbtn {
    display: block;
    width: 100%;
    background: #660033;
	color: #fff;
	font-size: 18px;
	padding: 11px;
    border: none;
	border-radius: 4px;
    cursor: pointer;
}

.center .sendbtn:hover {
  background-color: #993366;
}