* {
	box-sizing: border-box;
}

html,
body {
	padding: 0;
	margin: 0;
	height: 100%;
}

body {
	background: var(--page-background);
	color: var(--page-color);
	font-family: sans-serif;
}

h2 {
	margin: 0;
	margin-top: 1em;
	margin-bottom: 0.75em;
	font-size: 1.2em;
	font-weight: 200;
}

p {
	line-height: 1.8;
	margin-bottom: 2em;
}

a {
	color: inherit;
}

button {
	cursor: pointer;
	user-select: none;
}

.icon-button {
	background: transparent !important;
	border: 0;
	width: 3.25em;
	height: 3.25em;
	padding: 5px;
	outline: none;
}
.icon-button span {
	display: none;
}
.icon-button.menu-toggle:before {
	content: "";
	display: block;
	width: 100%;
	height: 2px;
	background: var(--page-color);
	border-radius: 1px;
	box-shadow: 0 11px 0 0 var(--page-color), 0 -11px 0 0 var(--page-color);
}

.icon-button.close:before,
.icon-button.close:after {
	content: "";
	display: block;
	width: 100%;
	height: 2px;
	background: var(--page-color);
	border-radius: 1px;
	transform-origin: center center;
}
.icon-button.close:before {
	position: relative;
	top: 1px;
	transform: rotate(45deg);
}
.icon-button.close:after {
	position: relative;
	top: -1px;
	transform: rotate(-45deg);
}

/* App layout */
#app {
	min-height: 100%;
	display: flex;
	flex-direction: column;
	height: 100%;
}

.main-view {
	display: flex;
	flex-direction: column;
	min-height: 100%;
	height: 100%;
}

.main-view header,
.main-view footer {
	flex-shrink: 0;
	text-align: center;
	display: flex;
	flex-direction: row;
	justify-content: center;
	align-items: center;
	min-height: 70px;
}

.main-view header h1 {
	font-size: 1.8rem;
	font-weight: 300;
	text-align: center;
}
.main-view header small {
	color: var(--text-color-muted);
}
.main-view main {
	flex-grow: 1;
	display: flex;
	flex-direction: column;
	justify-content: center;
}

.main-view footer {
	position: relative;
}
.main-view footer nav.menu {
	/*text-align: left;*/
	display: block !important;
	position: absolute;
	bottom: calc(100% - 10px);
	z-index: 10;
	width: 75%;
	max-width: 300px;
	transform-origin: center bottom;
	border-radius: var(--border-radius-medium);
	background: var(--page-background);
	padding: 8px;
	transform: scaleY(0);
	opacity: 0;
	transition: var(--transition-duration) ease-in-out all;
}
.main-view footer nav.menu.open {
	transform: scaleY(1);
	opacity: 1;
}
.main-view footer nav.menu ul {
	list-style-type: none;
	margin: 0;
	padding: 0;
}
.main-view footer nav.menu ul a {
	display: block;
	padding: 0.75em 1em;
	color: inherit;
	background: var(--nav-item-background);
	border-radius: var(--border-radius-small);
	text-decoration: none;
	margin-bottom: 8px;
}
.main-view footer nav.menu ul li:last-child a {
	margin-bottom: 0;
}

/* BPM circle */
#bpm-display-container {
	height: 320px;
	width: 320px;
	max-width: 70vw;
	max-height: 70vw;
	margin: 0 auto;
	border: 9px solid var(--graph-color);
	border-radius: 100%;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	margin: 0em auto 3em auto;
	cursor: pointer;
}

#bpm-display {
	text-align: center;
}

#bpm-display label {
	font-size: 1rem;
	text-transform: uppercase;
	color: var(--text-color-muted);
}

#bpm-value {
	display: block;
	font-size: 4rem;
	position: relative;
}

#bpm-value:empty:before {
	content: "–";
	color: var(--text-color-muted);
}

/* Graph */
#graph-container {
	background: var(--graph-background);
	height: 100px;
}

#graph-canvas {
	width: 100%;
	height: 100%;
	display: block;
}

/* Video, canvas and debug info */
#camera-feed,
#sampling-canvas {
	width: 100px;
	height: 100px;
}

/* Modals */
.modal {
	display: flex;
	opacity: 0;
	pointer-events: none;
	justify-content: center;
	align-items: center;
	position: absolute;
	z-index: 100;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: var(--backdrop-background);
	padding: 15px;
	transition: var(--transition-duration) ease-in-out all;
}
.modal.open {
	opacity: 1;
	pointer-events: all;
}

.modal .modal-box {
	background: var(--page-background);
	display: flex;
	flex-direction: column;
	border-radius: var(--border-radius-large);
	max-width: 500px;
	padding: 15px;
	max-height: 100%;
}
.modal .modal-box .heading {
	display: flex;
	align-items: center;
	margin-bottom: 1em;
}
.modal .modal-box .heading h1 {
	font-size: 1.5em;
	font-weight: normal;
	margin: 0;
	flex-grow: 1;
}
.modal .modal-box .content {
	overflow-y: auto;
}