*,
*::after,
*::before {
	box-sizing: border-box;
}

:root {
	font-size: 17px;
}

html, body {
	height: 100vh;
	overflow: hidden;
}

body {
	margin: 0;
	--color-text: #fff;
	--color-title: #dbb59b;
	--color-bg: #161a19;
	--color-link: #7f9993;
	--color-link-hover: #fff;
	--color-menu: #7f9993;
	--img-ratio: 1.5;
	font-weight: 300;
	color: var(--color-text);
	background: var(--color-bg);
	font-family: acumin-pro, -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

body::after {
	z-index: 1000;
	content: '';
	pointer-events: none;
	width: 100vw;
	height: 100vh;
	position: fixed;
	top: 0;
	left: 0;
	background: url(../img/shadow.png) no-repeat 100% 0%;
	background-size: cover;
	animation: move 7s infinite alternate 2s;
	transform-origin: 100% 0%;
}

@keyframes move {
	to {
		transform: scaleX(1.1);
	}
}

/* Page Loader */
.js .loading::before,
.js .loading::after {
	content: '';
	position: fixed;
	z-index: 1000;
}

.js .loading::before {
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: var(--color-bg);
}

.js .loading::after {
	top: 50%;
	left: 50%;
	width: 60px;
	height: 60px;
	margin: -30px 0 0 -30px;
	border-radius: 50%;
	opacity: 0.4;
	background: var(--color-link);
	animation: loaderAnim 0.7s linear infinite alternate forwards;

}

@keyframes loaderAnim {
	to {
		opacity: 1;
		transform: scale3d(0.5,0.5,1);
	}
}

a {
	text-decoration: none;
	color: var(--color-link);
	outline: none;
	white-space: nowrap;
	overflow: hidden;
	position: relative;
}

a::before {
	content: '';
	height: 1px;
	width: 100%;
	background: currentColor;
	position: absolute;
	top: 95%;
	transition: transform 0.3s;
	transform-origin: 0% 50%;
}

a:hover::before {
	transform: scaleX(0);
	transform-origin: 100% 50%;
}

a:hover {
	color: var(--color-link-hover);
	outline: none;
}

/* Better focus styles from https://developer.mozilla.org/en-US/docs/Web/CSS/:focus-visible */
a:focus {
	/* Provide a fallback style for browsers
	 that don't support :focus-visible */
	outline: none;
	background: lightgrey;
}

a:focus:not(:focus-visible) {
	/* Remove the focus indicator on mouse-focus for browsers
	 that do support :focus-visible */
	background: transparent;
}

a:focus-visible {
	/* Draw a very noticeable focus style for
	 keyboard-focus on browsers that do support
	 :focus-visible */
	outline: 2px solid red;
	background: transparent;
}

.oh {
	overflow: hidden;
}

.line {
	transform-origin: 0 50%;
	padding-bottom: 0.15rem;
	white-space: nowrap;
	will-change: transform;
}

.unbutton {
	background: none;
	border: 0;
	padding: 0;
	margin: 0;
	font: inherit;
}

.unbutton:focus {
	outline: none;
}

main {
	padding: 1rem;
	display: grid;
	height: 100%;
	grid-template-columns: 1fr 250px;
	grid-template-rows: 25% 25% 1fr;
	grid-template-areas: 'logo menu' '... ...' 'button-enter button-enter' 'frame frame';
}

.frame {
	grid-area: frame;
	padding-bottom: 0.5rem;
	position: relative;
	z-index: 200;
}

.frame__title {
	font-size: 1rem;
	margin: 0;
	font-weight: normal;
	position: relative;
}

.frame__links a:not(:last-child) {
	margin-right: 1rem;
}

.logo {
	margin: 0;
	font-size: 2.45rem;
	grid-area: logo;
	font-family: kudryashev-d-excontrast-sans, sans-serif;
	font-weight: 300;
	display: grid;
	justify-self: start;
	line-height: 1;
	color: var(--color-title);
}

.logo__layer {
	grid-area: 1 / 1 / 2 / 2;
	transition: all ease-out 0.5s;
}

.show .logo__layer--1 {
	opacity: 0.1;
}

.show .logo__layer--2 {
	opacity: 0.3;
	transform: translateX(50%);
}

.show .logo__layer--3 {
	transform: translateX(100%);
}

.button-menu {
	z-index: 100;
	margin: 0.5rem 1.5rem;
	grid-area: menu;
	justify-self: end;
	width: 1.65rem;
	height: 0.65rem;
	color: var(--color-menu);
	border-top: 2px solid currentColor;
	border-bottom: 2px solid currentColor;
	opacity: 0.5;
	align-self: start;
	cursor: not-allowed;
}

.intro-progress {
	grid-area: logo;
	justify-self: start;
	align-self: start;
	font-size: 10vw;
	width: 4ch;
	line-height: 0.5;
	font-weight: 400;
	color: var(--color-title);
}

.intro-image {
	position: relative;
	background-size: 100%;
	background-repeat: no-repeat;
	grid-area: 1 / 1 / -1 / -1;
	justify-self: end;
	--img-height: 260px;
	height: var(--img-height);
	width: calc( 1 / var(--img-ratio) * var(--img-height));
}

.intro-content__image .intro-image {
	--img-height: 360px;
}

.trail {
	position: relative;
	display: grid;
	place-items: center;
}

.no-js .trail {
	width: 100%;
	height: 100%;
	background-size: 100%;
}

.trail__img,
.trail__text {
	position: relative;
	will-change: transform;
	grid-area: 1 / 1 / 2 / 2;
}

.trail__img {
	width: 100%;
	height: 100%;
}

.intro-content {
	height: 100%;
	overflow: hidden;
	grid-area: 1 / 1 / -1 / -1;
	display: grid;
	grid-template-columns: 100%;
	justify-items: center;
	grid-template-rows: 4rem min-content min-content 1rem auto 1fr; 
	grid-template-areas: '...' 'title-up' 'title-down' '...' 'image' '...';
}

.intro-content__title {
	font-size: 25vh;
	font-size: clamp(1.5rem,22vh,14vw);
	line-height: 0.9;
	position: relative;
	color: var(--color-title);
	font-weight: 400;
	white-space: nowrap;
	align-self: end;
	will-change: transform;
}

.intro-content__title em {
	font-weight: 400;
	font-style: italic;
}

.intro-content__title--up {
	font-family: kudryashev-d-excontrast-sans, sans-serif;
	font-weight: 300;
	grid-area: title-up;
	align-self: end;
	opacity: 0;
}

.intro-content__title--up .trail__text {
	transform: translateY(-14vh);
}

.intro-content__title--down {
	text-transform: uppercase;
	grid-area: title-down;
	opacity: 0;
}

.intro-content__title--down .trail__text {
	transform: translateY(18vh);
}

.intro-content__image {
	grid-area: image;
	align-self: end;
}

.button-enter {
	position: relative;
	z-index: 200;
	grid-area: button-enter;
	align-self: center;
	justify-self: center;
	color: inherit;
	background: transparent;
	width: 100px;
	height: 100px;
	display: grid;
	place-items: center;
	border-radius: 50%;
	overflow: hidden;
	cursor: pointer;
	border: 1px solid currentColor;
	align-self: start;
}

.button-enter.hide {
	pointer-events: none;
}

.button-enter span {
	pointer-events: none;
	cursor: pointer;
	position: relative;
	display: block;
	width: 100%;
	height: 100%;
	display: grid;
	place-items: center;
	color: #fff;
	font-weight: 400;
	transform: translateY(1rem);
	transition: color, transform 0.3s;
}

.button-enter:hover span,
.button-enter:focus-visible span {
	color: #000;
	transform: translateY(0);
}

.button-enter::before {
	content: '';
	position: absolute;
	top: 50%;
	left: 50%;
	width: 100px;
	height: 100px;
	margin: -50px 0 0 -50px;
	background: #fff;
	transform: translateY(100%);
	transition: transform 0.3s;
}

.button-enter:hover::before,
.button-enter:focus-visible::before  {
	transform: translateY(0%);
}

.js .logo,
.js .button-menu,
.js .button-enter {
	opacity: 0;
}

.js .logo.show,
.js .button-menu.show,
.js .button-enter.show {
	transition: opacity ease-out 0.5s;
	opacity: 1;
}

.js .button-enter.show {
	transition: opacity ease-in-out 1.5s;
}

.content {
	pointer-events: none;
	height: 100%;
	grid-area: 1 / 1 / -1 / -1;
	display: grid;
	padding: 0 1rem;
	grid-template-columns: 31% 31% 31%;
	grid-column-gap: 3.5%;
	grid-template-rows: 4rem min-content min-content 2rem auto auto;
	grid-template-areas: '... ... ...'
						'content-title-up content-title-up content-title-up'
						'content-title-down content-title-down content-title-down'
						'... ... ...'
						'content-about content-about content-about'
						'content-img-1 content-img-2 content-img-3';
}

.content__title {
	position: relative;
}

.content__title .intro-content__title {
	font-size: clamp(2rem, 10vh, 8vw);
	width: min-content;
	grid-column: 1 / span 2;
}

.content__title--up {
	z-index: 1;
	grid-area: content-title-up;
	
}

.content__title--down {
	z-index: 3;
	grid-area: content-title-down;
}

.content__about {
	position: relative;
	z-index: 100;
	grid-area: content-about;
	display: flex;
	flex-direction: column;
	font-size: 1.3rem;
	line-height: 1.1;
	opacity: 0;
}

.content__about-title {
	font-style: italic;
	margin: 0 7vw 0 0;
}

.content__about p {
	margin: 0 0 1rem;
}

.content__image {
	position: relative;
	z-index: 2;
	display: flex;
	align-items: flex-end;
	margin-bottom: -20vh;
}

.content__image--1 {
	grid-area: content-img-1;
}

.content__image--2 {
	grid-area: content-img-2;
}

.content__image--3 {
	grid-area: content-img-3;
}

.content__image-inner,
.content__image .intro-image {
	background-position: 50% 0%;
	background-size: cover;
	width: 100%;
	height: 100%;
	opacity: 0;
	border-radius: 20vw 20vw 0 0;
	will-change: opacity, transform, border-radius;
}

@media screen and (min-width: 53em) {
	main {
		padding: 2.5rem 1rem 0;
		grid-column-gap: 5vw;
		grid-template-columns: 30vw 1fr 30vw;
		grid-template-rows: auto 50% 1fr auto;
		grid-template-areas: 'logo ... menu' 
							'... ... ...'
							'... button-enter ...' 
							'frame frame frame';
	}
	.intro-content {
		grid-template-rows: 32% 15% 35% 18%; 
		grid-template-areas: 'title-up' 'title-down' 'image' '...';
	}
	.intro-image {
		--img-height: 45vh;
	}

	.intro-content__image .intro-image {
		--img-height: 53vh;
	}
	.content {
		grid-template-rows: 20% 10vh 10vh auto auto;
		grid-template-areas: '... ... ...'
						'content-title-up content-about content-about'
						'content-title-down content-about content-about'
						'content-img-1 content-img-2 content-img-3';
	}
	.content__title .intro-content__title {
		grid-column: 1 / span 2;
	}
	.content__about {
		flex-direction: row;
		grid-row: 2 / span 2;
		justify-self: end;
		max-width: 440px;
	}
	.content__image-inner,
	.content__image .intro-image {
		height: 50vh;
		border-radius: 20vw 20vw 0 0;
	}
	.button-enter {
		align-self: center;
	}
	.frame {
		display: grid;
		width: 100%;
		grid-template-areas: 'title links sponsor';
		grid-template-columns: auto auto 1fr;
	}

	.frame__title {
		grid-area: title;
	}

	.frame__links {
		grid-area: links;
	}

	.frame__links {
		margin-left: 5vw;
	}
}