style.css

/*
Theme Name: HDGeolocate
Author: Harmonic Design
Author URI: https://harmonicdesign.ca
Description: Geolocate and offer redirection lightbox
*/

/* Basic Styles */
html {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}

*,
*:before,
*:after {
	-webkit-box-sizing: inherit;
	-moz-box-sizing: inherit;
	box-sizing: inherit;
}

* {
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

html,
body {
	margin: 0;
	padding: 0;
	font-size: 16px;
	line-height: 1.6;
	color: #4a4a4a;
	font-family: sans-serif;
	background: #fefefe;
}

main {
	margin: 20vh 0;
}

.wrap {
	width: 100%;
	max-width: 800px;
	margin: 0 auto;
}

/* HDGeolocate */
#hdg_popup {
	position: fixed;
	z-index: 9999;
	width: 100%;
	height: 100vh;
	top: 0;
	left: 0;
	background-color: rgba(0, 0, 0, 0.85);
	place-items: center;
	display: none;
}

#hdg_popup.active {
	display: grid;
}

#hdg_popup_content {
	padding: 2rem;
	border: 1px solid #222;
	background-color: #fff;
}

.button {
	padding: 0.4em 1em;
	line-height: 1;
	cursor: pointer;
	text-decoration: none;
	border: 1px solid #222;
	color: #222;
}

.button:hover {
	color: crimson;
	border-color: crimson;
}