@import url("https://api.fontshare.com/v2/css?f[]=archivo@100,200,300,400,500,600,700,800,900&f[]=clash-display@200,300,400,500,600,700&display=swap");

:root {
	--slide-width: min(18vw, 400px); /* 變更此樹參數，可調整互動區的尺寸 */
	--slide-aspect: 2 / 3;

	--slide-transition-duration: 800ms;
	--slide-transition-easing: ease;

	--font-archivo: "Archivo", sans-serif;
	--font-clash-display: "Clash Display", sans-serif;
}

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html,
body {
	width: 100%;
	height: 100%;
}

body {
	display: grid;
	place-items: center;
	overflow: hidden;
	/* background: rgba(0, 0, 0, 0.787); */
	background: transparent;
}

button {
	border: none;
	background: none;
	cursor: pointer;
	&:focus {
		outline: none;
		border: none;
	}
}

/* ------------------------------------------------ */
/* -------------------- SLIDER -------------------- */
/* ------------------------------------------------ */

.slider {	
	width: calc(3 * var(--slide-width));   /* 設定呈現5張*/
	height: calc(2 * var(--slide-height));
	display: flex;
	align-items: center;
}

.slider--btn {
	--size: 40px;

	display: inline-flex;
	justify-content: center;
	align-items: center;
	opacity: 0.7;
	transition: opacity 250ms cubic-bezier(0.215, 0.61, 0.355, 1);
	z-index: 999;

	& svg {
		width: var(--size);
		height: var(--size);
		stroke: white;
	}

	&:hover {
		opacity: 1;
	}
}

.slides__wrapper {
	width: 100%;
	height: 100%;

	display: grid;
	place-items: center;

	& > * {
		grid-area: 1 / -1;
	}
}

.slides,
.slides--infos {
	width: 100%;
	height: 100%;

	pointer-events: none;

	display: grid;
	place-items: center;
	& > * {
		grid-area: 1 / -1;
	}
}

/* ------------------------------------------------ */
/* -------------------- SLIDE --------------------- */
/* ------------------------------------------------ */

.slide {
	--slide-tx: 0px;
	--slide-ty: 0vh;
	--padding: 0px;  /* 圖片間隔 */
	--offset: 0;

	width: var(--slide-width);	
	height: auto;
	aspect-ratio: var(--slide-aspect);
	user-select: none;
	perspective: 800px;

	transform: perspective(1000px)
		translate3d(var(--slide-tx), var(--slide-ty), var(--slide-tz, 0))
		rotateY(var(--slide-rotY)) scale(var(--slide-scale));
	transition: transform var(--slide-transition-duration)
		var(--slide-transition-easing);
}

/* 當前 slide */
.slide[data-offset="0"] {
	--slide-scale: 1.3; /* 當前圖片縮放比例 */
	--slide-tx: 0;
	--slide-rotY: 0;
	pointer-events: auto;
}

/* 左右第一層 slide */
.slide[data-offset="1"] {
	--slide-tx: calc(1 * var(--slide-width) * 1.17);
	--slide-rotY: -45deg;
}
.slide[data-offset="-1"] {
	--slide-tx: calc(-1 * var(--slide-width) * 1.17);
	--slide-rotY: 45deg;
}

/* 左右第二層 slide */

.slide[data-offset="2"] {
	--slide-tx: calc(2 * var(--slide-width) * 1.07);
	--slide-rotY: -60deg;
}
.slide[data-offset="-2"] {
	--slide-tx: calc(-2 * var(--slide-width) * 1.07);
	--slide-rotY: 60deg;
}


/* 左右第三層 slide(總共呈現7張slide,需要用到時才拿掉註解) */
/*
.slide[data-offset="3"] {
	--slide-tx: calc(3 * var(--slide-width) * 1.07);
	--slide-rotY: -75deg;
}
.slide[data-offset="-3"] {
	--slide-tx: calc(-3 * var(--slide-width) * 1.07);
	--slide-rotY: 75deg;
}
*/

/* 左右第四層 slide(總共呈現9張slide,需要用到時才拿掉註解) */
/*
.slide[data-offset="4"] {
	--slide-tx: calc(4 * var(--slide-width) * 1.07);
	--slide-rotY: -90deg;
}
.slide[data-offset="-4"] {
	--slide-tx: calc(-4 * var(--slide-width) * 1.07);
	--slide-rotY: 90deg;
}
*/


.slide:not([data-offset="0"]) {
	--slide-scale: 1;
	--slide-tz: 0;
	/* --slide-tx: calc(var(--offset) * var(--slide-width) * 1.05); */
	/* --slide-rotY: calc(var(--dir) * -45deg); */   
	pointer-events: none;
}

.slide[data-offset="0"] {
	& .slide--image {
		filter: brightness(0.9); /* 當前圖片亮度 */
	}
}

.slide:not([data-offset="0"]) {
	& .slide--image {
		filter: brightness(0.5);		
	}
}

.slide:not([data-offset="-1"],[data-offset="0"],[data-offset="1"]) {
	& .slide--image {
		display:none;		
	}
}

/*呈現5張的情況下,其餘slide image都要隱藏*/
/*
.slide:not([data-offset="-2"],[data-offset="-1"],[data-offset="0"],[data-offset="1"],[data-offset="2"]) {
	& .slide--image {
		display:none;		
	}
}
*/

/*呈現7張的情況下,其餘slide image都要隱藏*/
/*
.slide:not([data-offset="-3"],[data-offset="-2"],[data-offset="-1"],[data-offset="0"],[data-offset="1"],[data-offset="2"],[data-offset="3"]) {
	& .slide--image {
		display:none;		
	}
}
*/

/*呈現9張的情況下,其餘slide image都要隱藏*/
/*
.slide:not([data-offset="-4"],[data-offset="-3"],[data-offset="-2"],[data-offset="-1"],[data-offset="0"],[data-offset="1"],[data-offset="2"],[data-offset="3"],[data-offset="4"]) {
	& .slide--image {
		display:none;		
	}
}
*/


.slide__inner {
	--rotX: 0;
	--rotY: 0;
	--bgPosX: 0%;
	--bgPosY: 0%;

	position: relative;
	left: calc(var(--padding) / 2);
	top: calc(var(--padding) / 2);
	width: calc(100% - var(--padding));
	height: calc(100% - var(--padding));
	transform-style: preserve-3d;
	transform: rotateX(var(--rotX)) rotateY(var(--rotY));
}

.slide--image__wrapper {
	position: relative;
	width: 100%;
	height: 100%;
	overflow: hidden;
}

.slide--image {
	width: 100%;
	height: 100%;
	position: absolute;
	top: 50%;
	left: 50%;
	object-fit: cover;
	transform: translate(-50%, -50%) scale(1.2) /* 原scale參數1.2 */
		translate3d(var(--bgPosX), var(--bgPosY), 0);
	transition: filter var(--slide-transition-duration)
		var(--slide-transition-easing);
}

.slide__bg {
	position: fixed;
	inset: -20%;
	/* background-image: var(--bg);
	background-size: cover;
	background-position: center center; */

	z-index: -1;
	pointer-events: none;

	transition: opacity var(--slide-transition-duration) ease,
		transform var(--slide-transition-duration) ease;

	&::before {
		content: "";
		position: absolute;
		inset: 0;
	}

	&::before {
		/* background: rgba(0, 0, 0, 0.8); 
		backdrop-filter: blur(8px);*/
	}	

	&:not([data-offset="0"]) {
		opacity: 0;
	}

	&[data-offset="-1"] {
		transform: translateX(-10%);
	}

	&[data-offset="1"] {
		transform: translateX(10%);
	}

}

/* ------------ SLIDE INFO ---------------- */

.slide-info {
	--padding: 0px;

	position: relative;
	width: var(--slide-width);
	height: 100%;
	aspect-ratio: var(--slide-aspect);
	user-select: none;
	perspective: 800px;
	z-index: 100;
}


.slide-info[data-offset="0"] {
	& .slide-info--text span {
		opacity: 1;
		transform: translate3d(0, 0, 0);
		transition-delay: 250ms;
	}
}

.slide-info:not([data-offset="0"]) {
	& .slide-info--text span {
		opacity: 0;
		transform: translate3d(0, 100%, 0);
		transition-delay: 0ms;
	}
}



.slide-info__inner {
	position: relative;
	left: calc(var(--padding) / 2);
	top: calc(var(--padding) / 2);
	width: calc(100% - var(--padding));
	height: calc(100% - var(--padding));
	transform-style: preserve-3d;
	transform: rotateX(var(--rotX)) rotateY(var(--rotY));
}

.slide-info--text__wrapper {
	--z-offset: 45px;

	position: absolute;
	height: fit-content;
	/* left: -15%; */
	left: 0;
	bottom: 15%;
	transform: translateZ(var(--z-offset));
	z-index: 2;
	pointer-events: none;
}

.slide-info--text {
	font-family: var(--font-clash-display);
	color: #fff;
	overflow: hidden;

	& span {
		display: block;
		white-space: nowrap;
		transition: var(--slide-transition-duration) var(--slide-transition-easing);
		transition-property: opacity, transform;
	}

	&[data-title],
	&[data-subtitle] {
		font-size: min(3cqw, 2.4rem);
		font-weight: 800;
		letter-spacing: 0.2cqw;
		white-space: nowrap;
		text-transform: uppercase;
	}

	&[data-subtitle] {
		margin-left: 1cqw;
		font-size: min(2.2cqw, 1.8rem);
		font-weight: 600;
	}

	&[data-description] {
		margin-left: 1cqw;
		font-size: min(1.5cqw, 0.95rem);
		font-family: var(--font-archivo);
		font-weight: 300;
	}
}

/* ------------------------------------------------ */
/* -------------------- LOADER --------------------- */
/* ------------------------------------------------ */

.loader {
	position: fixed;
	inset: 0;

	display: grid;
	place-items: center;

	/* background: #000; */
	background: transparent;
	z-index: 1000;

	opacity: 1;
	transition: opacity 0.5s ease-out;

	.loader__text {
		font-family: var(--font-clash-display);
		font-size: clamp(2rem, 2vw, 5rem);
		font-weight: 800;
		color: #fff;
	}
}

/* ------------------------------------------- */

.support {
	position: absolute;
	right: 10px;
	bottom: 10px;
	padding: 10px;
	display: flex;
	a {
		margin: 0 10px;
		color: #fff;
		font-size: 1.8rem;
		backface-visibility: hidden;
		transition: all 150ms ease;
		&:hover {
			transform: scale(1.1);
		}
	}
}