/* ============================================================
   motion.css - toan bo hoat hinh cua trang, gom mot cho.
   Chi hoat hinh transform/opacity de trinh duyet chay tren GPU.
   ============================================================ */

:root {
  /* Duong cong toc do: mo phong chuyen dong that, khong tuyen tinh */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1); /* bat dau nhanh, dung lai muot */
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1); /* nay nhe khi ket thuc */

  --dur-fast: 180ms;
  --dur-base: 320ms;
  --dur-slow: 560ms;
  --dur-reveal: 720ms;
}

/* ---------- 1. Xuat hien khi cuon toi ---------- */
[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 26px, 0);
  transition: opacity var(--dur-reveal) var(--ease-out), transform var(--dur-reveal) var(--ease-out);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* Bien the: truot ngang, dung cho khoi hai cot */
[data-reveal='left'] {
  transform: translate3d(-32px, 0, 0);
}
[data-reveal='right'] {
  transform: translate3d(32px, 0, 0);
}
[data-reveal='zoom'] {
  transform: scale(0.96);
}

/* ---------- 2. Anh hien dan khi tai xong ---------- */
.img-fade {
  opacity: 0;
  transition: opacity 520ms var(--ease-out);
}

.img-fade.is-loaded {
  opacity: 1;
}

/* ---------- 3. Man hinh cho ---------- */
.site-loader {
  transition: opacity 420ms var(--ease-out), visibility 420ms;
}

.site-loader__spinner {
  animation: spin 720ms cubic-bezier(0.5, 0.1, 0.4, 0.9) infinite;
}

/* ---------- 4. Hero ---------- */
.hero__slide {
  transition: opacity 900ms var(--ease-in-out), visibility 900ms;
}

/* Anh nen phong rat cham tao chieu sau (hieu ung Ken Burns) */
.hero__slide.is-active .hero__media {
  animation: heroZoom 12s var(--ease-out) forwards;
}

@keyframes heroZoom {
  from {
    transform: scale(1.08);
  }
  to {
    transform: scale(1);
  }
}

/* Chu trong hero: tung dong troi len lech nhau */
.hero__content > * {
  animation: heroRise 760ms var(--ease-out) both;
}

.hero__content > *:nth-child(1) {
  animation-delay: 60ms;
}
.hero__content > *:nth-child(2) {
  animation-delay: 150ms;
}
.hero__content > *:nth-child(3) {
  animation-delay: 240ms;
}
.hero__content > *:nth-child(4) {
  animation-delay: 330ms;
}

@keyframes heroRise {
  from {
    opacity: 0;
    transform: translate3d(0, 28px, 0);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Doi slide: chu cu mo dan roi chu moi troi len */
.hero__stage.is-swapping-out .hero__content {
  opacity: 0;
  transform: translate3d(0, -14px, 0);
  transition: opacity 240ms var(--ease-in-out), transform 240ms var(--ease-in-out);
}

.hero__stage.is-swapping-in .hero__content > * {
  animation: heroRise 620ms var(--ease-out) both;
}

/* ---------- 5. Header ---------- */
.site-header {
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}

.site-header.is-scrolled {
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
}

/* Gach chan chay tu giua ra khi tro chuot vao muc menu */
.site-nav__link {
  position: relative;
  transition: color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
  opacity: 0;
}

.site-nav__link:hover::after {
  transform: scaleX(1);
  opacity: 0.35;
}

.site-nav__link.is-active::after {
  transform: scaleX(1);
  opacity: 0;
}

/* Thanh tien do cuon trang */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  pointer-events: none;
}

.site-header.is-scrolled .scroll-progress {
  opacity: 1;
}

/* Menu di dong: truot xuong mem */
@media (max-width: 900px) {
  .site-nav {
    transition: transform 380ms var(--ease-out), opacity 300ms var(--ease-out), visibility 380ms;
    transform: translate3d(0, -14px, 0);
  }

  .site-header.is-menu-open .site-nav {
    transform: none;
  }

  .site-header.is-menu-open .site-nav__link {
    animation: heroRise 420ms var(--ease-out) both;
  }

  .site-header.is-menu-open .site-nav__link:nth-child(1) {
    animation-delay: 40ms;
  }
  .site-header.is-menu-open .site-nav__list li:nth-child(2) .site-nav__link {
    animation-delay: 80ms;
  }
  .site-header.is-menu-open .site-nav__list li:nth-child(3) .site-nav__link {
    animation-delay: 120ms;
  }
  .site-header.is-menu-open .site-nav__list li:nth-child(4) .site-nav__link {
    animation-delay: 160ms;
  }
}

/* ---------- 6. Nut ---------- */
.btn {
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-base) var(--ease-out),
    color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
  will-change: transform;
}

/* Vet sang luot qua khi tro chuot vao */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    transparent 20%,
    rgba(255, 255, 255, 0.22) 45%,
    transparent 70%
  );
  transform: translateX(-110%);
  transition: transform 620ms var(--ease-out);
  pointer-events: none;
}

.btn:hover::before {
  transform: translateX(110%);
}

.btn:hover {
  transform: translate3d(0, -2px, 0);
}

.btn:active {
  transform: translate3d(0, 0, 0) scale(0.985);
  transition-duration: 90ms;
}

.link-arrow::after {
  transition: transform var(--dur-base) var(--ease-spring);
}

.link-arrow:hover::after {
  transform: rotate(-45deg) translate(4px, 4px);
}

/* ---------- 7. The (card) ---------- */
/* Bong do dat o lop rieng: chi doi opacity nen khong bat trinh duyet ve lai bong */
.card,
.product-card,
.feature-tile {
  position: relative;
  transition: transform var(--dur-base) var(--ease-out);
  will-change: transform;
}

.card::after,
.product-card::after,
.feature-tile::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.13);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  pointer-events: none;
}

.card:hover,
.feature-tile:hover {
  transform: translate3d(0, -5px, 0);
}

.product-card:hover {
  transform: translate3d(0, -6px, 0);
}

.card:hover::after,
.product-card:hover::after,
.feature-tile:hover::after {
  opacity: 1;
}

.product-card:active {
  transform: translate3d(0, -2px, 0) scale(0.995);
  transition-duration: 110ms;
}

.product-card__media img,
.feature-tile__media img {
  transition: transform 720ms var(--ease-out);
  will-change: transform;
}

.product-card:hover .product-card__media img {
  transform: scale(1.06);
}

.feature-tile:hover .feature-tile__media img {
  transform: scale(1.05);
}

/* ---------- 8. Loc san pham ---------- */
.product-grid > * {
  transition: transform 460ms var(--ease-out), opacity 300ms var(--ease-out);
}

.product-card.is-leaving {
  opacity: 0;
  transform: scale(0.94) translate3d(0, 8px, 0);
}

.product-card.is-entering {
  animation: cardIn 480ms var(--ease-out) both;
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: scale(0.94) translate3d(0, 14px, 0);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.filter-chip {
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}

.filter-chip:active {
  transform: scale(0.96);
}

/* ---------- 9. Cua so chi tiet san pham ---------- */
.modal__backdrop {
  animation: fadeIn 260ms var(--ease-out) both;
}

.modal__dialog {
  animation: dialogIn 420ms var(--ease-spring) both;
}

.modal.is-closing .modal__backdrop {
  animation: fadeIn 200ms var(--ease-in-out) reverse both;
}

.modal.is-closing .modal__dialog {
  animation: dialogOut 200ms var(--ease-in-out) both;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes dialogIn {
  from {
    opacity: 0;
    transform: translate3d(0, 26px, 0) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes dialogOut {
  from {
    opacity: 1;
    transform: none;
  }
  to {
    opacity: 0;
    transform: translate3d(0, 14px, 0) scale(0.985);
  }
}

.gallery-strip img {
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.gallery-strip img:hover {
  transform: translate3d(0, -3px, 0);
  border-color: var(--brand);
}

/* ---------- 10. Thong ke ---------- */
.stat__value {
  font-variant-numeric: tabular-nums; /* so khong nhay ngang khi dem */
}

/* ---------- 11. O nhap lieu ---------- */
.field__control {
  transition: border-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out);
}

.field__error {
  display: block;
  opacity: 0;
  transform: translate3d(0, -4px, 0);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.field.has-error .field__error {
  opacity: 1;
  transform: none;
}

.field.has-error .field__control {
  animation: shake 420ms var(--ease-out);
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-5px);
  }
  40% {
    transform: translateX(4px);
  }
  60% {
    transform: translateX(-3px);
  }
  80% {
    transform: translateX(2px);
  }
}

.form-success {
  animation: dialogIn 520ms var(--ease-spring) both;
}

/* ---------- 12. Nut lien he noi ---------- */
.fab__toggle {
  transition: transform var(--dur-base) var(--ease-spring), background var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}

.fab__toggle:hover {
  transform: scale(1.07) translate3d(0, -2px, 0);
}

.fab__toggle:active {
  transform: scale(0.97);
  transition-duration: 100ms;
}

.fab__item {
  transition: opacity 260ms var(--ease-out), transform 320ms var(--ease-spring);
}

.fab__btn {
  transition: transform var(--dur-base) var(--ease-spring), filter var(--dur-base) var(--ease-out);
}

.fab__btn:hover {
  transform: scale(1.1) translate3d(0, -1px, 0);
}

.fab__bubble {
  transition: opacity 360ms var(--ease-out), transform 420ms var(--ease-spring);
}

.fab__pulse {
  animation: fabPulse 2.6s var(--ease-out) infinite;
}

@keyframes fabPulse {
  0% {
    transform: scale(1);
    opacity: 0.55;
  }
  70% {
    transform: scale(1.55);
    opacity: 0;
  }
  100% {
    transform: scale(1.55);
    opacity: 0;
  }
}

/* ---------- 13. Thong bao ---------- */
.toast {
  animation: toastIn 380ms var(--ease-spring) both;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translate3d(0, 18px, 0) scale(0.96);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 14. Dot dieu huong slideshow ---------- */
.hero__dot {
  transition: background var(--dur-base) var(--ease-out), width var(--dur-base) var(--ease-out);
}

.hero__dot:hover {
  background: rgba(15, 23, 42, 0.4);
}

.hero--dark .hero__dot:hover {
  background: rgba(255, 255, 255, 0.55);
}

.hero__toggle {
  transition: transform var(--dur-base) var(--ease-spring), background var(--dur-base) var(--ease-out);
}

.hero__toggle:hover {
  transform: scale(1.1);
}

/* ---------- 15. Moc thoi gian & chip ---------- */
.timeline__item {
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.timeline__item:hover {
  transform: translate3d(0, -3px, 0);
}

.cert-chip {
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.cert-chip:hover {
  transform: translate3d(0, -2px, 0);
  border-color: var(--brand);
}

.info-item {
  transition: background var(--dur-base) var(--ease-out);
}

.info-item__icon {
  transition: transform var(--dur-base) var(--ease-spring);
}

.info-item:hover .info-item__icon {
  transform: scale(1.08) rotate(-4deg);
}

/* ============================================================
   Ton trong lua chon "giam chuyen dong" cua nguoi dung.
   Tat toan bo hoat hinh nhung van giu trang dung chuc nang.
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .img-fade {
    opacity: 1;
  }

  .btn::before,
  .fab__pulse {
    display: none;
  }
}

/* ---------- 16. Nội dung vừa được làm mới từ CMS ---------- */
/* Nháy nhẹ một cái để người xem biết trang vừa cập nhật, không gây chói mắt */
body.is-refreshed main,
body.is-refreshed .site-header,
body.is-refreshed .site-footer {
  animation: contentRefreshed 700ms var(--ease-out) both;
}

@keyframes contentRefreshed {
  from {
    opacity: 0.55;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.is-refreshed main,
  body.is-refreshed .site-header,
  body.is-refreshed .site-footer {
    animation: none;
  }
}

/* ---------- 17. Khối "Hình ảnh thực tế" ---------- */
.gallery__slide {
  transition: opacity 620ms var(--ease-in-out), visibility 620ms;
}

/* Ảnh đang hiện phóng rất chậm, tạo cảm giác sống động */
.gallery__slide.is-active img {
  animation: galleryDrift 9s var(--ease-out) forwards;
}

@keyframes galleryDrift {
  from {
    transform: scale(1.06);
  }
  to {
    transform: scale(1);
  }
}

.gallery__caption {
  animation: heroRise 620ms var(--ease-out) both;
  animation-delay: 120ms;
}

.gallery__nav {
  transition: transform var(--dur-base) var(--ease-spring), background var(--dur-base) var(--ease-out);
}

.gallery__nav:hover {
  transform: scale(1.1);
  background: #fff;
}

.gallery__nav:active {
  transform: scale(0.94);
  transition-duration: 100ms;
}

.gallery__thumb {
  transition: opacity var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.gallery__thumb:hover {
  opacity: 1;
  transform: translate3d(0, -2px, 0);
}

.gallery__thumb img {
  transition: transform 520ms var(--ease-out);
}

.gallery__thumb:hover img {
  transform: scale(1.06);
}

@media (prefers-reduced-motion: reduce) {
  .gallery__slide.is-active img,
  .gallery__caption {
    animation: none;
  }
}