@import url('https://fonts.googleapis.com/css?family=Rubik+Mono+One|Roboto+Mono:400,700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800;900&display=swap');

:root {
	--color-primary: #18181a;
	--color-secondary: #75757c;
	--color-dark: #364c62;
	--color-light: #f5f5f5;
	--font-family-primary: 'Roboto Mono', monospace;
	--font-family-secondary: 'Rubik Mono One', sans-serif;
	--td: 150ms;
	--te: cubic-bezier(0.215, 0.61, 0.355, 1);
}

.nav-main {
	align-items: center;
	display: flex;
	height: 100%;
	justify-content: center;
	left: -100%;
	padding-left: 0px;
	position: fixed;
	transition:
		left 0s calc(var(--td) * 2),
		transform 0s calc(var(--td) * 2);
	width: 100%;
	z-index: 10;
}

.nav-main::before,
.nav-main::after {
	content: '';
	background-color: var(--color-primary);
	height: 50%;
	left: 0;
	position: absolute;
	transform: translateX(-110%);
	transform-origin: 0 50%;
	transition: transform calc(var(--td) * 2) var(--td) var(--te);
	width: 100%;
	z-index: -100;
}

.nav-main::before {
	top: 0;
}

.nav-main::after {
	bottom: 0;
}

.nav-main .menu__item {
	opacity: 0;
	transform: translateX(-1rem);
	transition:
		opacity var(--td) var(--te),
		transform var(--td) var(--te);
}

[id='main-navigation-toggle'] {
	opacity: 0;
	position: fixed;
	top: -100%;
	z-index: 100;
}

[id='main-navigation-toggle'] ~ label {
	cursor: pointer;
	position: fixed;
	left: 0.5rem;
	top: 0.5rem;
	z-index: 100;
}

[id='main-navigation-toggle'] ~ label span {
	display: block;
	height: 2rem;
	padding: 0.5rem;
	position: relative;
	transition: transform calc(var(--td) * 3) var(--te);
	width: 2rem;
	color: var(--color-light);
	z-index: 100;
}

[id='main-navigation-toggle'] ~ label span::before {
	transform: rotate(0) translateY(-100%);
}

[id='main-navigation-toggle'] ~ label span::after {
	transform: rotate(0) translateY(100%);
}

[id='main-navigation-toggle']:checked ~ label span {
	transform: rotate(1turn);
}

[id='main-navigation-toggle']:checked ~ label span::before {
	transform: rotate(45deg);
}

[id='main-navigation-toggle']:checked ~ label span::after {
	transform: rotate(-45deg);
}

[id='main-navigation-toggle']:checked ~ .nav-main {
	left: 0;
	transition: transform 0s;
}

[id='main-navigation-toggle']:checked ~ .nav-main::before,
[id='main-navigation-toggle']:checked ~ .nav-main::after {
	transform: translateX(0);
	transition-delay: 0s;
}

[id='main-navigation-toggle']:checked ~ .nav-main::after {
	transition-delay: calc(var(--td) / 2);
}

[id='main-navigation-toggle']:checked ~ .nav-main .menu__item {
	opacity: 1;
	transform: translateX(0);
	transition:
		opacity calc(var(--td) * 2) var(--te),
		transform calc(var(--td) * 2) var(--te);
}

[id='main-navigation-toggle']:checked ~ .nav-main .menu__item:nth-child(1) {
	transition-delay: calc(var(--td) * 2 * (1 * 0.25));
	z-index: -1;
}

[id='main-navigation-toggle']:checked ~ .nav-main .menu__item:nth-child(2) {
	transition-delay: calc(var(--td) * 2 * (2 * 0.25));
	z-index: -2;
}

[id='main-navigation-toggle']:checked ~ .nav-main .menu__item:nth-child(3) {
	transition-delay: calc(var(--td) * 2 * (3 * 0.25));
	z-index: -3;
}

[id='main-navigation-toggle']:checked ~ .nav-main .menu__item:nth-child(4) {
	transition-delay: calc(var(--td) * 2 * (4 * 0.25));
	z-index: -4;
}

[id='main-navigation-toggle']:checked ~ .nav-main .menu__item:nth-child(5) {
	transition-delay: calc(var(--td) * 2 * (5 * 0.25));
	z-index: -5;
}

.menu {
	position: relative;
	text-align: center;
	z-index: 1;
	padding-left: 0px;
}

.menu > .menu__item {
	font-family: var(--font-family-secondary);
	font-size: 10vmin;
}

.submenu {
	padding-left: 0;
	left: 0;
	opacity: 0;
	position: absolute;
	transform: translateY(-10%);
	top: 100%;
	width: 100%;
	visibility: hidden;
	z-index: 2;
}

.submenu .menu__item {
	font-family: var(--font-family-primary);
	font-size: 3.5vmin;
	width: 100%;
}

.menu__parent {
	cursor: default;
}

.submenu .menu__link {
	color: var(--color-secondary);
	text-shadow:
		1px 1px 0 var(--color-primary),
		2px 2px 0 var(--color-primary);
}

.submenu .menu__link::before,
.submenu .menu__link::after {
	display: none;
}

.menu__item {
	display: block;
	position: relative;
}

.menu__item:hover .menu__link::before,
.menu__item:hover .menu__link::after {
	animation: blink 1s var(--td) steps(1, end) forwards infinite;
	transform: translateX(calc(100% - 0.5rem));
	transition-duration: calc(var(--td) * 3);
}

.menu__item:hover .menu__link::after {
	transition-delay: calc(var(--td) / 2);
}

.menu__item:hover .submenu {
	opacity: 1;
	transform: translateY(0);
	transition:
		transform calc(var(--td) * 2) calc(var(--td) * 3) var(--te),
		opacity calc(var(--td) * 2) calc(var(--td) * 3) var(--te),
		visibility 0s calc(var(--td) * 3);
	visibility: visible;
}

.menu__link {
	color: var(--color-dark);
	display: inline-block;
	font-weight: normal;
	overflow: hidden;
	padding: 0.5rem 1rem 0.125rem;
	position: relative;
	text-decoration: none;
	transition:
		color var(--td) var(--te),
		opacity var(--td) var(--te),
		transform var(--td) var(--te);
	z-index: 1;
}

.menu__link::before,
.menu__link::after {
	content: '';
	background-color: var(--color-light);
	height: 50%;
	left: 0;
	position: absolute;
	transform: translateX(-110%);
	transform-origin: 0 50%;
	transition: transform 0s var(--te);
	width: 100%;
	z-index: -1;
}

.menu__link::before {
	top: 0;
}

.menu__link::after {
	bottom: 0;
}

.menu:not(:focus-within):not(:hover) .menu__item .menu__link {
	opacity: 1;
	transform: translate(0, 0);
}

.menu__item {
	--pull: 30%;
}

.menu__item .menu__link {
	opacity: 0.25;
	transition-duration: calc(var(--td) * 3);
	transform: translate(0, calc(var(--pull) * -1));
}

.menu__item .submenu .menu__link {
	opacity: 1;
}

.menu__item:hover > .menu__link {
	color: var(--color-secondary);
	opacity: 1;
	transform: translate(0, 0);
}

.menu__item:hover > .menu__link:hover {
	color: var(--color-light);
	transition-delay: 0s;
}

.menu__item:hover ~ .menu__item > .menu__link {
	transition-duration: calc(var(--td) * 3);
	transform: translate(0, var(--pull));
}

@keyframes blink {
	50%,
	100% {
		opacity: 0;
	}
}