/* ==========================================================================
   index.css — style riêng cho trang Index (Tử Điện Hắc Báo).
   Style dùng chung cho layout (reset, font, nút CTA, icon link, footer,
   fullpage-scroll...) nằm ở layout.css.
   ========================================================================== */

/* === section backgrounds & thứ tự lớp === */
#section-1 {
	z-index: 1;
	overflow: hidden;
}

#section-2 {
	z-index: 2;
	background-image: url("../images/bg_sec2.png");
	background-repeat: no-repeat;
	background-position: top center;
	background-size: cover;
}

#section-3 {
	z-index: 3;
	background-image: url("../images/bg_sec3.png");
	background-repeat: no-repeat;
	background-position: top center;
	background-size: cover;
}

#section-4 {
	z-index: 4;
	background-image: url("../images/bg_sec4.png");
	background-repeat: no-repeat;
	background-position: top center;
	background-size: cover;
}

#section-5 {
	z-index: 5;
	--vtc-color-bg-sec5: #0a0612;
	background-color: var(--vtc-color-bg-sec5);
	background-image: url("../images/bg_sec5.png");
	background-repeat: no-repeat;
	background-position: top center;
	background-size: cover;
}

/* dùng chung cho khối tiêu đề section-3 / section-4 */
.section-title {
	width: 100%;
	margin-inline: auto;
}

@media (min-width: 1280px) {
	.section-title {
		width: 65.63%;
	}
}

/* ==========================================================================
   section-1: Hero
   ========================================================================== */
.hero {
	position: relative;
}

.hero__video {
	position: absolute;
	inset: 0;
	z-index: -10;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.hero__logo {
	width: 50%;
	min-width: 120px;
	max-width: 348px;
	margin-inline: auto;
}

@media (min-width: 640px) {
	.hero__logo {
		width: 18%;
	}
}

.hero__title {
	width: 100%;
	margin-inline: auto;
	position: relative;
}

@media (min-width: 1280px) {
	.hero__title {
		width: 64.58%;
	}
}

.hero__spark {
	position: absolute;
	inset: 0;
	width: 100%;
}

.hero__desc {
	width: 100%;
	margin-inline: auto;
	position: relative;
}

@media (min-width: 1280px) {
	.hero__desc {
		width: 53.75%;
	}
}

.hero__cta {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 0.25rem;
}

@media (min-width: 640px) {
	.hero__cta {
		flex-direction: row;
		gap: 1rem;
	}
}

.hero__social {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 0.75rem;
}

.hero__social-group {
	width: fit-content;
	display: flex;
	align-items: center;
	gap: 0.75rem;
}

.hero__brand-logo {
	width: 100%;
	height: 100%;
	object-fit: contain;
}

/* === title-spark (electric flicker decor) === */
.title-spark {
	animation: title-spark-flicker 3.2s infinite;
}

@keyframes title-spark-flicker {
	0%,
	44%,
	100% {
		opacity: 1;
	}
	4% {
		opacity: 0.35;
	}
	7% {
		opacity: 0.9;
	}
	9% {
		opacity: 0.15;
	}
	13% {
		opacity: 1;
	}
	46% {
		opacity: 0.4;
	}
	49% {
		opacity: 1;
	}
	51% {
		opacity: 0.1;
	}
	55% {
		opacity: 1;
	}
	80% {
		opacity: 0.5;
	}
	83% {
		opacity: 1;
	}
}

@media (prefers-reduced-motion: reduce) {
	.title-spark {
		animation: none;
	}
}

/* ==========================================================================
   section-2: Hắc Báo - Kẻ Săn Mồi (char section)
   ========================================================================== */
.char {
	width: 100%;
	display: grid;
	place-items: center;
	gap: 1rem;
	padding-block: max(2.5rem, 6%);
	padding-inline: 1rem;
}

@media (min-width: 640px) {
	.char {
		padding-top: max(2rem, 3%);
		padding-bottom: 0;
	}
}

@media (min-width: 1280px) {
	.char {
		aspect-ratio: 1920 / 920;
	}
}

.char__grid {
	width: 100%;
	margin-inline: auto;
}

.char-section-grid {
	width: 100%;
	max-width: 1420px;
	margin-inline: auto;
	display: grid;
	grid-template-columns: 1fr;
	grid-template-areas:
		"title"
		"swiper"
		"nav";
}

.char-section-grid__title {
	grid-area: title;
	width: 100%;
	margin-inline: auto;
}

.char-title-img {
	width: 100%;
}

@media (min-width: 1280px) {
	.char-title-img {
		transform: scale(1.15);
	}
}

.char-section-grid__nav {
	grid-area: nav;
	width: 100%;
	position: relative;
	margin-inline: auto;
	padding-bottom: max(2.5rem, 6%);
}

@media (min-width: 640px) {
	.char-section-grid__nav {
		padding-bottom: max(2rem, 3%);
	}
}

@media (min-width: 768px) {
	.char-section-grid {
		grid-template-columns: 50% 50%;
		place-items: end;
		grid-template-areas:
			"swiper title"
			"swiper nav";
		align-items: stretch;
	}
}

.char-swiper {
	grid-area: swiper;
	position: relative;
	width: 100%;
	padding: 0 1.5rem;
}

/* .char-wrapper xếp chồng 2 .char-item lên đúng 1 ô lưới (grid-area: 1 / 1) để chúng
   đè lên nhau ở vị trí ban đầu, thay vì phải position:absolute + tự set kích thước. */
.char-wrapper {
	position: relative;
	display: grid;
}

.char-item {
	grid-area: 1 / 1;
	position: relative;
	display: flex;
	align-items: flex-end;
	justify-content: center;
	transform-origin: bottom;
	translate: -10% 0;
	scale: 0.9;
	transition:
		translate 0.3s ease,
		scale 0.3s ease,
		filter 0.3s ease;
	filter: grayscale(80%);
	z-index: 1;
}

/* Nhân vật đang active: dịch sang phải 15%, phóng về scale thật, bỏ hiệu ứng xám.
   Nhân vật còn lại vẫn ở trạng thái mặc định (dịch trái 10%, thu nhỏ 0.9, xám, nằm dưới).
   transform-origin: bottom để scale thu/phóng dính đáy, không làm nhân vật lơ lửng lên trên. */
.char-item.char-item--active {
	translate: 15% 0;
	scale: 1;
	filter: grayscale(0);
	z-index: 2;
}

@media (min-width: 768px) {
	.char-item {
		translate: -15% 32px;
	}
	.char-item.char-item--active {
		translate: 15% 32px;
	}
}

.char-item img {
	width: auto;
	max-width: 100%;
	height: auto;
	max-height: 32rem;
	display: block;
}

.char-tag {
	position: absolute;
	width: 30%;
	top: 5%;
	opacity: 0;
	visibility: hidden;
	transition:
		opacity 0.3s ease,
		visibility 0.3s ease;
}

@media (min-width: 768px) {
	.char-tag {
		top: 8%;
	}
}

.char-tag--1 {
	top: 12%;
	right: 0%;
}

.char-tag--2 {
	right: 0.5rem;
}

.char-item--active .char-tag {
	opacity: 1;
	visibility: visible;
}

.char-arrow {
	position: absolute;
	top: 50%;
	z-index: 3;
	width: 1.5rem;
	height: auto;
	padding: 0;
	border: 0;
	background: transparent;
	transform: translateY(-50%);
	cursor: pointer;
}

.char-arrow img {
	width: 100%;
	height: auto;
	display: block;
}

.char-arrow--prev {
	left: 0;
	transform: translateY(-50%) scaleX(-1);
}

.char-arrow--next {
	right: 0;
}

@media (min-width: 768px) {
	/* Desktop: .char-swiper (grid item) bị align-items:stretch kéo cao bằng cả hàng
	   title+nav bên cạnh -> thừa khoảng trắng phía dưới. Ghim wrapper xuống đáy để
	   nhân vật luôn sát mép dưới thay vì lơ lửng ở trên. */
	.char-swiper {
		display: flex;
		flex-direction: column;
		justify-content: flex-end;
	}

	.char-arrow {
		width: 2rem;
	}

	.char-item img {
		max-height: 48rem;
	}
}

@media (min-width: 1024px) {
	.char-item img {
		max-height: 56rem;
	}
}

/* tabs "Hồ sơ nhân vật" / "Thông tin chiến đấu" (dùng khung Bootstrap nav/tab-pane) */
.char-tabs {
	margin-inline: auto;
}

@media (min-width: 768px) {
	.char-tabs {
		max-width: 80%;
		margin-inline: auto;
	}
}

.char-tabs__nav {
	width: 75%;
	margin-inline: auto;
	position: relative;
	z-index: 2;
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 0.5rem;
	transform: translateY(35%);
}

.char-tabs__item {
	width: 45%;
	aspect-ratio: 223 / 37;
}

.char-tabs__btn {
	display: block;
	padding: 0;
	border: 0;
	background: transparent;
	cursor: pointer;
	transition: transform 0.3s ease-in-out;
}

.char-tabs__btn.active {
	transform: translateY(-0.125rem);
}

.char-tabs__icon {
	display: block;
	width: auto;
	object-fit: contain;
}

.char-tabs__content {
	width: 100%;
}

.char-tabs__panel {
	width: 100%;
	height: auto;
	display: block;
}

/* ==========================================================================
   section-3: Set vũ khí VVIP
   ========================================================================== */
.weapon-visual {
	width: 100%;
	margin-inline: auto;
	position: relative;
	/* margin-top: max(3%, 2rem); */
}

@media (min-width: 1280px) {
	.weapon-visual {
		width: 45.52%;
	}
}

/* === weapon-mirror: lật ngang ảnh súng xoay 360 độ để nòng hướng trái ở góc mặc định === */
/* scale(1.5) để ảnh súng to hơn, bù lại khoảng trống do object-contain co theo chiều cao khung */
.weapon-mirror {
	/* transform: scaleX(-1) scale(1.5); */
	overflow: hidden;
}

.weapon-visual__frame {
	width: 100%;
	aspect-ratio: 970 / 285;
}

.weapon-visual__frame-img {
	width: 100%;
	height: 100%;
	object-fit: contain;
	overflow: hidden;
}

.weapon-label {
	width: fit-content;
	position: absolute;
	z-index: 2;
	bottom: 0;
	left: 0;
	transform: translateY(50%);
}

.weapon-label__code,
.weapon-label__title {
	margin: 0;
	font-weight: 700;
	color: #d0d0d0;
	text-transform: uppercase;
}

.weapon-label__code {
	font-size: 0.875rem;
}

@media (min-width: 768px) {
	.weapon-label__code {
		font-size: 1rem;
	}
}

@media (min-width: 1024px) {
	.weapon-label__code {
		font-size: 1.25rem;
	}
}

@media (min-width: 768px) {
	.weapon-label__title {
		font-size: 1.5rem;
	}
}

@media (min-width: 1024px) {
	.weapon-label__title {
		font-size: 2.25rem;
	}
}

.weapon-feature {
	width: 100%;
	margin-inline: auto;
	position: relative;
}

@media (min-width: 1280px) {
	.weapon-feature {
		width: 45.52%;
	}
}

.feature-box {
	background-image: url("../images/img_frame_sec3.png");
	background-repeat: no-repeat;
	background-position: top center;
	background-size: 100% 100%;
	aspect-ratio: 955 / 317;
}

/* === weapon-rotate (kéo để xoay súng 360 độ) === */
.weapon-feature__rotate {
	position: absolute;
	top: 8%;
	left: 0;
	right: 0;
	width: 85%;
	max-width: 820px;
	margin-inline: auto;
	transform: translateY(0%);
}

@media (min-width: 768px) {
	.weapon-feature__rotate {
		transform: translateY(45%);
	}
}

.weapon-rotate {
	height: 32px;
	touch-action: none;
	z-index: 2;
}

.weapon-rotate:focus-visible {
	outline: none;
}

.weapon-rotate__track {
	position: absolute;
	top: 50%;
	left: 0;
	right: 0;
	height: 2px;
	background: linear-gradient(90deg, transparent, rgba(180, 152, 224, 0.65), transparent);
	transform: translateY(-50%);
	pointer-events: none;
}

.weapon-feature__handle {
	width: 14%;
	max-width: 135px;
	aspect-ratio: 1 / 1;
}

.weapon-rotate__handle {
	position: absolute;
	top: 50%;
	transform: translate(-50%, -50%);
	cursor: grab;
	touch-action: none;
	user-select: none;
	transition: filter 0.2s ease;
}

.weapon-rotate__handle img {
	width: 100%;
	height: 100%;
	pointer-events: none;
	user-select: none;
	animation: dot-process-blink 1.6s ease-in-out infinite;
}

/* Nhấp nháy nhẹ để gợi ý đây là chỗ kéo được */
@keyframes dot-process-blink {
	0%,
	100% {
		opacity: 1;
		filter: drop-shadow(0 0 4px #b498e0);
	}
	50% {
		opacity: 0.5;
		filter: drop-shadow(0 0 12px #b498e0);
	}
}

.weapon-rotate.is-dragging .weapon-rotate__handle {
	cursor: grabbing;
	filter: drop-shadow(0 0 10px #b498e0);
}

.weapon-rotate.is-dragging .weapon-rotate__handle img {
	animation-play-state: paused;
	opacity: 1;
}

.weapon-rotate:focus-visible .weapon-rotate__handle {
	filter: drop-shadow(0 0 10px #b498e0);
}

@media (prefers-reduced-motion: reduce) {
	.weapon-rotate__handle img {
		animation: none;
	}
}

.weapon-feature__detail-wrap {
	position: absolute;
	top: 37%;
	left: 0;
	right: 0;
	width: 85%;
	max-width: 820px;
	margin-inline: auto;
}

.weapon-feature__detail {
	object-fit: contain;
	width: auto;
	height: auto;
	pointer-events: none;
}

.weapon-feature__detail--custom {
	max-width: 80%;
}

.weapon-feature__detail--default {
	max-width: 30%;
}

/* === item-image / item-feat appear animation === */
.item-appear {
	animation: item-appear-fade 0.45s ease-out;
}

@keyframes item-appear-fade {
	from {
		opacity: 0;
		transform: translateY(12px) scale(0.96);
	}
	to {
		opacity: 1;
		transform: translateY(0) scale(1);
	}
}

@media (prefers-reduced-motion: reduce) {
	.item-appear {
		animation: none;
	}
}

.weapon-dots {
	width: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 1rem;
}

.weapon-dot {
	width: 32px;
	height: 48px;
	max-width: 70px;
	aspect-ratio: 1 / 1;
	cursor: pointer;
	opacity: 0.5;
	transition: all 0.3s ease-in-out;
}

@media (min-width: 768px) {
	.weapon-dot {
		width: 70px;
		height: 70px;
	}
}

.active[data-type="item-dot"],
[data-type="item-dot"]:hover {
	opacity: 1 !important;
	scale: 1.1 !important;
	filter: drop-shadow(0px 0px 10px #b498e0);
}

/* ==========================================================================
   section-4: Tính năng nổi bật
   ========================================================================== */
.feat {
	width: 100%;
	display: flex;
	flex-direction: column;
	justify-content: space-around;
	align-items: center;
	gap: 1rem;
	padding-block: max(2.5rem, 6%);
	padding-inline: 0.5rem;
}

@media (min-width: 640px) {
	.feat {
		padding-block: max(2rem, 3%);
	}
}

@media (min-width: 1280px) {
	.feat {
		height: 100vh;
	}
}

/* === feat-slider (Swiper carousel, center mode) === */
.feat-slider {
	position: relative;
	width: 90%;
	max-width: 1400px;
	margin-inline: auto;
	padding: 1rem 1.5rem;
}

.feat-item {
	padding-inline: var(--vtc-spacing-2);
	cursor: zoom-in;
}

.feat-item:focus-visible {
	outline: 2px solid var(--vtc-color-accent);
	outline-offset: 2px;
}

.feat-item img {
	width: 100%;
	height: auto;
	border-radius: var(--vtc-radius-lg);
}

/* === feat-lightbox (popup phóng to feat-item) === */
.feat-lightbox {
	position: fixed;
	inset: 0;
	z-index: 100;
	display: grid;
	place-items: center;
	padding: 2rem 1rem;
	background: rgba(4, 2, 10, 0.85);
	opacity: 0;
	visibility: hidden;
	transition:
		opacity 0.25s ease,
		visibility 0.25s ease;
}

.feat-lightbox.is-active {
	opacity: 1;
	visibility: visible;
}

.feat-lightbox__inner {
	position: relative;
	width: 100%;
	max-width: 680px;
	transform: scale(0.9);
	transition: transform 0.25s ease;
}

.feat-lightbox.is-active .feat-lightbox__inner {
	transform: scale(1);
}

.feat-lightbox__inner img {
	width: 100%;
	height: auto;
	max-height: 85vh;
	object-fit: contain;
	border-radius: var(--vtc-radius-lg);
}

.feat-lightbox__close {
	position: absolute;
	top: -2.5rem;
	right: 0;
	width: 2rem;
	height: 2rem;
	display: grid;
	place-items: center;
	border: 0;
	background: transparent;
	color: #fff;
	font-size: 1.75rem;
	line-height: 1;
	cursor: pointer;
}

@media (min-width: 768px) {
	.feat-lightbox__close {
		top: -0.5rem;
		right: -2.5rem;
	}
}

.feat-slider .swiper-slide {
	opacity: 0.6;
	transition:
		transform 0.3s ease,
		opacity 0.3s ease;
	transform: scale(0.85);
}

.feat-slider .swiper-slide.swiper-slide-active {
	opacity: 1;
	transform: scale(1);
}

.feat-slider .feat-arrow {
	position: absolute;
	top: 50%;
	z-index: 2;
	width: 1.5rem;
	height: auto;
	padding: 0;
	border: 0;
	background: transparent;
	transform: translateY(-50%);
	cursor: pointer;
}

.feat-slider .feat-arrow img {
	width: 100%;
	height: auto;
	display: block;
}

.feat-slider .feat-arrow--prev {
	left: 0;
	transform: translateY(-50%) scaleX(-1);
}

.feat-slider .feat-arrow--next {
	right: 0;
	rotate: 180deg;
	transform: translateY(50%) scaleX(-1);
}

@media (min-width: 768px) {
	.feat-slider {
		padding: 1rem 2rem;
	}

	.feat-slider .feat-arrow {
		width: 2rem;
	}
}

@media (min-width: 576px) {
	.feat-slider .swiper-slide {
		transform: scale(0.8);
	}
}

/* padding-block: chừa chỗ để slide active (scale 1.1 bên dưới) phình ra mà không bị
   .swiper (overflow:hidden mặc định) cắt mất phần trên/dưới. */
@media (min-width: 1280px) {
	.feat-slider .swiper-wrapper {
		padding-block: 1rem;
	}

	.feat-slider .swiper-slide.swiper-slide-active {
		transform: scale(1.1);
	}
}

/* ==========================================================================
   section-5: Chi tiết sự kiện
   ========================================================================== */
.detail-title {
	width: 100%;
	margin-inline: auto;
}

@media (min-width: 1280px) {
	.detail-title {
		width: 45.36%;
	}
}

.detail-content {
	width: 100%;
	margin-inline: auto;
}

@media (min-width: 1280px) {
	.detail-content {
		width: 45.04%;
	}
}

.detail-cta {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
}

.detail-cta .btn-cta {
	width: 30%;
}

/* ==========================================================================
   Thanh điều hướng nhanh cố định bên trái (chỉ hiện ở >=1280px)
   ========================================================================== */
.section-nav {
	display: none;
	position: fixed;
	top: 25%;
	left: 1rem;
	z-index: 999;
	transform: translateY(-50%);
	place-items: center;
	padding: 2rem 1rem;
	background: url("../images/bg_menu.png") no-repeat top center/100% 100%;
	aspect-ratio: 192 / 292;
}

@media (min-width: 1280px) {
	.section-nav {
		display: grid;
	}
}

.section-nav__body {
	height: 75%;
	width: 100%;
	display: grid;
	place-items: center;
}

.section-nav__item {
	width: 100%;
	background: var(--vtc-color-primary-soft);
	cursor: pointer;
	white-space: nowrap;
	text-align: center;
	padding: 0.5rem 0.75rem;
	font-size: 12px;
	color: var(--vtc-color-accent);
	transition: all 0.3s ease-in-out;
}

@media (min-width: 768px) {
	.section-nav__item {
		font-size: 1rem;
	}
}

.section-nav__item[data-state="active"] {
	color: #fff;
	font-weight: 700;
	background: var(--vtc-color-primary);
}