included are system fonts for unified look, remove if needed

pardot_sm.css

/* uses body to overwrite all other stylings without !important */

body {
	padding:  0;
	margin:  0;

	/* Use system fonts for best rendering */
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

body form.form {
    padding: 0;
    margin: 0;
}

body form.form p.required label, 
body form.form span.required label {
	background:  none;
}

body form.form p label, 
body form.form p label {
	display: block;
    width: 100%;
    text-align: left;
    background:  none;
    float:  none;
    padding: 0;
    font-weight:  bold;
    margin: 0 0 5px 0;
}

body form.form p.required label::after, 
body form.form span.required label::after {
	content:  "*";
	display: inline;
	color:  #f00;
}

body form.form select {
	height:  40px;
}

body form.form input,
body form.form input.text,
body form.form select,
body form.form textarea {
	padding: 8px 10px;
	font-size: 14px;
	width: 100%;
	border-radius: 3px;
	border: 1px solid #ddd;
}

body form.form input {
	box-sizing: border-box;
}

body form.form input[type="checkbox"],
body form.form input[type="radio"] {
	width:  auto;
}

body form.form .value span {
	display:  inline-block;
}

body form.form .value span label {
	display:  inline;
}

body form.form span.value {
	margin-left: 0;
}

body form.form p.submit {
	margin: 0;
}

body form.form p {
	padding:  0;
	margin:  15px 0;
}

body form.form p.submit input[type="submit"] {
	display: inline-block;
	margin: 0;
	width: auto;
	box-sizing: content-box;
	padding: 10px 20px;
	font-size: 18px;
	background: #503083;
	color: #fff;
	border: none;
	border-radius: 4px;
	height: auto;
	margin-top: 0;
}