.card
	h1 3D Button with Shading (Experiment)
	div
		button.btn Default
		button.btn.btn-info Information
		button.btn.btn-success Success
		button.btn.btn-warning Warning
		button.btn.btn-error Error
		button.btn.btn-dark Dark
		//- Custom style by setting the prepared variables
		button.btn(style="--color: #ffffff; --background-color: #ff4081; --border-color: #ec407a;") Jelly beans

////////////////////////////////////////////////////////////////////////////////
// IF YOU WANT TO USE THIS STYLE, PLEASE READ THIS                            //
////////////////////////////////////////////////////////////////////////////////
// This is written in SCSS. If you would like to use the CSS, you may compile //
// the code, then use the CSS style on your own project.                      //
// Please take note that the code above the block of comment:                 //
// STYLES RELATED TO EXPERIMENT BUTTONS                                       //
// Is just for the styling of the page. These are not related to the styles   //
// of the buttons. So after compiling to CSS, you may just take the part      //
// on or below the said block of comments.                                    //
// You may also customize the colors of the buttons, or actually add a new    //
// class for the buttons, by editing the $btn-type map before compiling the   //
// source code into CSS.                                                      //
////////////////////////////////////////////////////////////////////////////////

@import url("https://fonts.googleapis.com/css?family=Open+Sans:400,400i,700");

body {
	font-family: "Open Sans", sans-serif;
	font-size: 16px;
	background-color: #e2e2e2;
	width: 100vw;
	height: 100vh;
	display: flex;
}

.card {
	background-color: #ffffff;
	width: calc(100% - 4rem);
	padding: 4rem 2rem;
	border: solid 1px #eaeaea;
	margin: auto;
	border-radius: 2.5rem;
	box-sizing: border-box;
	box-shadow: 0 1rem 2rem rgba(#000000, 0.3);
	h1 {
		text-align: center;
		padding: 0;
		margin: 0;
		margin-bottom: 2rem;
	}
	div {
		display: flex;
		align-items: center;
		justify-content: center;
		flex-wrap: wrap;
	}
}

.btn {
	margin-bottom: 0.5rem;
	margin-right: 0.5rem;
	&:last-child {
		margin-right: 0;
	}
}

@media screen and (min-width: 960px) {
	.card {
		width: calc(960px - 4rem);
	}
}

/******************************************************************************/
/* STYLES RELATED TO EXPERIMENT BUTTONS                                       */
/******************************************************************************/

$btn-padding: 0.6rem 0.9rem;
$btn-border-radius: 0.5rem;
$btn-transition-time: 64ms;

// The Map for the CSS class of the buttons
$btn-type: (
	"info": (
		"color": #ffffff,
		"background-color": #0091ea,
	),
	"success": (
		"color": #ffffff,
		"background-color": #00c853,
	),
	"warning": (
		"color": #3e2723,
		"background-color": #ffc400,
	),
	"error": (
		"color": #ffffff,
		"background-color": #d50000,
	),
	"dark": (
		"color": #ffffff,
		"background-color": #303030,
	),
);

.btn {
	--color: #000000;
	--background-color: #d8d8d8;
	--border-color: darken(#d8d8d8, 7.5%);
  color: var(--color);
	font-family: inherit;
  background-color: var(--background-color);
  padding: $btn-padding;
  border: solid 1px var(--border-color);
	outline: none;
	position: relative;
  border-radius: $btn-border-radius;
	user-select: none;
  box-shadow:
		0 0.2rem 0.4rem rgba(0, 0, 0, 0.4),
		0 -0.3rem 0.6rem rgba(0, 0, 0, 0.2) inset;
  transition: box-shadow $btn-transition-time ease-out;
	&:after {
		content: "";
		background-color: #ffffff;
		width: 75%;
		height: 12.5%;
		position: absolute;
		top: 0.15rem;
		left: 12.5%;
		border-radius: 50%;
		filter: blur(0.15rem);
		transition: opacity $btn-transition-time ease-out;
	}
	&:active {
		box-shadow:
			0 0 0 rgba(0, 0, 0, 0.4),
			0 0.4rem 1rem rgba(0, 0, 0, 0.3) inset;
		&:after {
			opacity: 0;
		}
	}
}

@each $type, $styles in $btn-type {
	.btn-#{$type} {
		@each $style, $value in $styles {
			--#{$style}: #{$value};
			@if ($style == "background-color") {
				--border-color: #{darken($value, 7.5%)};
			}
			&:active {
				@if ($style == "color") {
					--#{$style}: #{darken($value, 7.5%)};
				}
			}
		}
	}
}