* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
	margin: 0;
    padding: 0;
	height: -webkit-fill-available;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
	background: #212121;
	margin: 0;
	padding: 0;
	height: -webkit-fill-available;
}

#main-container {
	width: 100%;
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
	min-height: -webkit-fill-available;
	align-items: center;
	justify-content: center;
}

p {
	margin: 10px 0;
}

a {
    color: #8A8A8A;
	font-size: 20px;
    text-decoration: none;
    margin: 0 20px;
    padding: 10px 20px;
    position: relative;
    overflow: hidden;
    display: inline-block;
    -moz-transition: ease-out 0.2s;
    -o-transition: ease-out 0.2s;
    -webkit-transition: ease-out 0.2s;
    transition: ease-out 0.2s;
}

a::before {
    width: 5px;
    height: 5px;
    background: transparent;
    content: "";
    position: absolute;
    right: 0;
    top: 0;
    border-right: 2px solid white;
    border-top: 2px solid white;
    -moz-transition: 0.2s;
    -o-transition: 0.2s;
    -webkit-transition: 0.2s;
    transition: 0.2s;
    opacity: 0;
}

a:hover::before {
    opacity: 1;
    right: 5px;
    top: 5px;
}

a::after {
    width: 5px;
    height: 5px;
    background: transparent;
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    border-left: 2px solid white;
    border-bottom: 2px solid white;
    -moz-transition: 0.2s;
    -o-transition: 0.2s;
    -webkit-transition: 0.2s;
    transition: 0.2s;
    opacity: 0;
}

a:hover::after {
    opacity: 1;
    left: 5px;
    bottom: 5px;
}

a:hover {
    color: white;
}

a span::before {
    width: 5px;
    height: 5px;
    background: transparent;
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    border-top: 2px solid white;
    border-left: 2px solid white;
    -moz-transition: 0.2s;
    -o-transition: 0.2s;
    -webkit-transition: 0.2s;
    transition: 0.2s;
    opacity: 0;
}

a:hover span::before {
    opacity: 1;
    left: 5px;
    top: 5px;
}

a span::after {
    width: 5px;
    height: 5px;
    background: transparent;
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    -moz-transition: 0.2s;
    -o-transition: 0.2s;
    -webkit-transition: 0.2s;
    transition: 0.2s;
    opacity: 0;
}

a:hover span::after {
    opacity: 1;
    right: 5px;
    bottom: 5px;
}