$font--role-default: 'Lato', sans-serif;
$font--role-emphasis: 'Montserrat', sans-serif;

$color__text--primary: rgba(0, 0, 0, 0.87);
$color__text--secondary: rgba(0, 0, 0, 0.54);

$color__lightgray--primary: #F5F5F5;
$color__lightgray--darker: #EEEEEE;
$color__lightgray--darkest: #E0E0E0;

$color__gray--primary: #EEEEEE;
$color__gray--darker: #E0E0E0;
$color__gray--darkest: #BDBDBD;

$color__darkgray--primary: #757575;
$color__darkgray--darker: #525252;
$color__darkgray--darkest: #424242;

$color__orange--primary: #F57C00;
$color__orange--darker: #EF6C00;
$color__orange--darkest: #de621c;

$color__green--primary: rgba(76, 175, 80, 0.86);
$color__green--darker: #349238;
$color__green--darkest: #1B5E20;

$color__blue--primary: #1E88E5;
$color__blue--darker: #1565C0;
$color__blue--darkest: #0D47A1;

$color__red--primary: #e74860;
$color__red--darker: #B71C1C;

$color__lightblue--primary: #03A9F4;

@keyframes flash {
	0% {
		background-color: $color__gray--darker;
	}
	50% {
		background-color: $color__lightgray--darkest;
	}
	75% {
		background-color: $color__gray--primary;
	}
	to {
		background-color: $color__gray--darker;
	}
}

@mixin flash {
	animation-name: flash;
	animation-duration: 1s;
	animation-iteration-count: infinite;
	animation-timing-function: linear;
}

@mixin loading-overlay($background-color: #fff, $border-radius: 0.25rem) {
	width: 100%;
	height: 100%;
	position: absolute;
	background-color: $background-color;
	z-index: 1;
	top: 0;
	position: absolute;
	display: flex;
	align-items: center;
	justify-content: center;
	opacity: 0;
	pointer-events: none;
	transition: all 0.2s;
	@include user-select(none);
	cursor: default;
	border-radius: $border-radius;

	@at-root #{&}--show {
		opacity: 1;
		pointer-events: all;
	}

	@at-root #{&}__message {
		font-size: 1.5rem;
		color: #fff;
		font-style: italic;
	}
}

@mixin text($family: $font--role-default, $size: 1rem, $weight: 300) {
	font-family: $family;
	font-size: $size;
	font-weight: $weight;
}

@mixin optional-at-root($sel) {
	@at-root #{if(not &, $sel, selector-append(&, $sel))} {
		@content;
	}
}

@mixin placeholder {
	@include optional-at-root('::-webkit-input-placeholder') {
		@content;
	}

	@include optional-at-root(':-moz-placeholder') {
		@content;
	}

	@include optional-at-root('::-moz-placeholder') {
		@content;
	}

	@include optional-at-root(':-ms-input-placeholder') {
		@content;
	}
}

@mixin user-select($select) {
	@each $pre in -webkit-, -moz-, -ms-, -o- {
		#{$pre + user-select}: #{$select};
	}
	#{user-select}: #{$select};
}

.shadow_border {
	box-shadow: 0 0 0.3rem rgba(175, 175, 175, 0.25);
}
.shadow_border--hover {
	box-shadow: 0 0 0.3rem rgba(175, 175, 175, 0.25), 0 0.2rem 0.35rem rgba(175, 175, 175, 0.25);
}


.tab_button {
	padding: 0.5rem 0.75rem;
	border-radius: 3rem;
	cursor: pointer;
	transition: all 0.2s;
	margin-right: 0.5rem;
	display: inline-block;
	position: relative;
	top: -0.1rem; 

	@include user-select(none);

	&:hover {
		background-color: $color__lightgray--darker;
	}
	&:active {
		background-color: #dcdcdc;
	}

	&::after {
		content: '';
		position: absolute;
		background-color: $color__blue--primary;
		width: calc(100% - 1rem);
		left: 0.5rem;
		bottom: -0.3rem;
		height: 0.2rem;
		opacity: 0;
		transition: opacity 0.2s;
	}

	@at-root #{&}--selected {
		cursor: default;
		font-weight: bold;

		&:active, &:hover {
			background-color: transparent;
		}

		&::after {
			opacity: 1;
		}
	}
}