/* ==========================================================================
   CÁC THÀNH PHẦN GIAO DIỆN DÙNG CHUNG (COMPONENTS)
   Page Loader 2 Vòng Quỹ Đạo, Navbar Thu Nhỏ Khi Cuộn, Footer, Buttons, Cards, Modals
   ========================================================================== */

/* 0. MÀN HÌNH LOAD LOGO TRÒN (2 VÒNG QUỸ ĐẠO XOAY NGƯỢC CHIỀU SANG TRỌNG - KHÔNG CHỚP GIẬT) */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: radial-gradient(circle at 50% 45%, #FFFFFF 0%, #F2F7FF 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  will-change: opacity, visibility;
  backface-visibility: hidden;
  transform: translateZ(0);
  transition:
    opacity 320ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.page-loader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.page-loader__orb {
  position: relative;
  width: 118px;
  height: 118px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  will-change: transform;
  transition: transform 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.page-loader--hidden .page-loader__orb {
  transform: scale(0.92);
}

/* Vòng quỹ đạo xoay chính bên ngoài */
.page-loader__orb::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid rgba(11, 94, 215, 0.12);
  border-top-color: var(--color-primary);
  border-right-color: var(--color-accent);
  will-change: transform;
  animation: ltyri-orbit-spin 0.95s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
}

/* Vòng quỹ đạo nét đứt xoay ngược bên trong */
.page-loader__orb::after {
  content: '';
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  border: 2px dashed rgba(77, 163, 255, 0.38);
  will-change: transform;
  animation: ltyri-orbit-spin-reverse 2.4s linear infinite;
}

/* Khung tròn chứa Logo LT 3D đổ bóng ánh xanh cao cấp */
.page-loader__circle {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background-color: #FFFFFF;
  box-shadow:
    0 12px 30px rgba(11, 94, 215, 0.18),
    inset 0 0 0 1.5px var(--color-border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  will-change: transform;
  animation: ltyri-logo-pulse 1.8s ease-in-out infinite;
}

.page-loader__img {
  width: 86%;
  height: 86%;
  object-fit: contain;
  border-radius: 50%;
  user-select: none;
  -webkit-user-drag: none;
}

/* Thanh tiến độ ánh xanh bên dưới Logo tròn */
.page-loader__track {
  width: 108px;
  height: 3.5px;
  background-color: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
  position: relative;
}

.page-loader__bar {
  width: 45%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-pill);
  will-change: transform;
  animation: ltyri-bar-slide 1.05s ease-in-out infinite;
}

@keyframes ltyri-orbit-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes ltyri-orbit-spin-reverse {
  to {
    transform: rotate(-360deg);
  }
}

@keyframes ltyri-logo-pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes ltyri-bar-slide {
  0% {
    transform: translate3d(-100%, 0, 0);
  }
  50% {
    transform: translate3d(120%, 0, 0);
  }
  100% {
    transform: translate3d(240%, 0, 0);
  }
}

/* 1. Thanh tiến độ cuộn trang trên đỉnh */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 1100;
  pointer-events: none;
}

.scroll-progress__bar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform-origin: 0% 50%;
  transform: scaleX(0);
}

/* 2. Navbar dính trên cùng (Kính mờ, thu nhỏ gọn lại khi cuộn xuống, không biến mất) */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background-color: var(--color-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition:
    height 280ms var(--ease-out),
    background-color 280ms var(--ease-out),
    box-shadow 280ms var(--ease-out),
    border-color 280ms var(--ease-out);
}

.navbar--scrolled {
  height: 58px;
  background-color: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border-strong);
}

.navbar__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.navbar__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.navbar__logo-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  width: 158px;
  overflow: hidden;
  transition: height 280ms var(--ease-out), width 280ms var(--ease-out);
}

.navbar--scrolled .navbar__logo-wrap {
  height: 40px;
  width: 126px;
}

.navbar__logo {
  height: 100%;
  width: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.32);
  mix-blend-mode: multiply;
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.navbar__link {
  position: relative;
  padding: 0.55rem 0.95rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-navy);
  border-radius: var(--radius-sm);
  transition:
    padding 280ms var(--ease-out),
    color var(--transition-fast),
    background-color var(--transition-fast);
  white-space: nowrap;
}

.navbar--scrolled .navbar__link {
  padding: 0.4rem 0.85rem;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0.95rem;
  right: 0.95rem;
  height: 2.5px;
  background-color: var(--color-primary);
  border-radius: var(--radius-pill);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 280ms var(--ease-out);
}

.navbar__link:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
}

.navbar__link:hover::after,
.navbar__link--active::after {
  transform: scaleX(1);
  transform-origin: left center;
}

.navbar__link--active {
  color: var(--color-primary);
  font-weight: 600;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.navbar--scrolled .navbar__cta-desktop {
  min-height: 38px;
  padding: 0.45rem 1.05rem;
  font-size: var(--text-xs);
}

/* 3. Bộ chọn ngôn ngữ (Dropdown) */
.lang-switcher {
  position: relative;
}

.lang-switcher__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 42px;
  padding: 0.45rem 0.8rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition:
    min-height 280ms var(--ease-out),
    padding 280ms var(--ease-out),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.navbar--scrolled .lang-switcher__btn {
  min-height: 36px;
  padding: 0.3rem 0.7rem;
}

.lang-switcher__btn:hover {
  border-color: var(--color-primary);
}

.lang-switcher__menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 156px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  padding: var(--space-1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: 1050;
}

.lang-switcher--open .lang-switcher__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher__option {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.75rem;
  font-size: var(--text-sm);
  color: var(--color-navy);
  border-radius: var(--radius-xs);
  text-align: left;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.lang-switcher__option:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
}

.lang-switcher__option--active {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}

.navbar__toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-navy);
  background-color: var(--color-surface);
  transition: width 280ms var(--ease-out), height 280ms var(--ease-out);
}

.navbar--scrolled .navbar__toggle {
  width: 38px;
  height: 38px;
}

/* 4. Hệ thống Nút bấm (Buttons) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 46px;
  padding: 0.65rem 1.35rem;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.2;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-xs);
}

.btn--primary:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-primary);
}

.btn--secondary {
  background-color: var(--color-surface);
  color: var(--color-navy);
  border-color: var(--color-border-strong);
}

.btn--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
}

.btn--ghost {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.btn--ghost:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn--lg {
  min-height: 52px;
  padding: 0.85rem 1.75rem;
  font-size: var(--text-base);
}

.btn--full {
  width: 100%;
}

/* 5. Thẻ nội dung (Cards) */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card--interactive:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.7rem;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-pill);
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

/* 6. Biểu mẫu & Ô nhập liệu (Forms) */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: var(--space-4);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
}

.form-label__req {
  color: var(--color-danger);
  margin-left: 2px;
}

.form-control {
  width: 100%;
  min-height: 46px;
  padding: 0.65rem 0.95rem;
  font-size: var(--text-base);
  color: var(--color-navy);
  background-color: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control::placeholder {
  color: #8C9BB5;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3.5px var(--color-primary-focus);
}

.form-control--error {
  border-color: var(--color-danger);
  background-color: var(--color-danger-bg);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger);
  font-weight: 500;
  min-height: 1.1rem;
}

.form-alert {
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-4);
  display: none;
}

.form-alert--success {
  display: block;
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(15, 118, 110, 0.25);
}

/* 7. Bộ lọc Danh mục (Filter Pills) */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.filter-btn {
  min-height: 42px;
  padding: 0.5rem 1.15rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-btn--active {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-xs);
}

/* 8. Accordion (Câu hỏi thường gặp) */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.accordion__item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.accordion__item--open {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  text-align: left;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-navy);
}

.accordion__icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-base), background-color var(--transition-fast);
}

.accordion__item--open .accordion__icon {
  transform: rotate(180deg);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.accordion__content {
  height: 0;
  overflow: hidden;
}

.accordion__body {
  padding: 0 var(--space-6) var(--space-5);
  color: var(--color-text-muted);
}

/* 9. Modal & Lightbox */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 31, 68, 0.68);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: 1200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-backdrop--open {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: 100%;
  max-width: 820px;
  max-height: 90vh;
  overflow-y: auto;
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  position: relative;
}

.modal__close {
  position: sticky;
  top: var(--space-4);
  float: right;
  margin-right: var(--space-4);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-navy);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  z-index: 5;
}

.modal__close:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
}

/* Lightbox xem ảnh toàn màn hình */
.lightbox {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 31, 68, 0.92);
  backdrop-filter: blur(8px);
  z-index: 1300;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox--open {
  opacity: 1;
  visibility: visible;
}

.lightbox__stage {
  position: relative;
  max-width: 960px;
  width: 100%;
  max-height: 76vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__media {
  width: 100%;
  max-height: 74vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base);
  cursor: zoom-in;
}

.lightbox__media--zoomed {
  transform: scale(1.35);
  cursor: zoom-out;
}

.lightbox__caption {
  margin-top: var(--space-4);
  color: var(--color-text-inverse);
  text-align: center;
  font-size: var(--text-base);
}

.lightbox__controls {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  display: flex;
  gap: var(--space-2);
}

.lightbox__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.14);
  color: var(--color-text-inverse);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.lightbox__btn:hover {
  background-color: var(--color-primary);
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.16);
  color: var(--color-text-inverse);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.lightbox__nav:hover {
  background-color: var(--color-primary);
}

.lightbox__nav--prev {
  left: var(--space-5);
}

.lightbox__nav--next {
  right: var(--space-5);
}

/* 10. Cụm nút nổi (Floating Action Cluster) */
.floating-cluster {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: 990;
}

.floating-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
  position: relative;
}

.floating-btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-lg);
}

.floating-btn--phone {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.floating-btn--zalo {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.78rem;
}

.floating-btn--top {
  background-color: var(--color-navy);
  color: var(--color-text-inverse);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.floating-btn--top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.floating-btn__tooltip {
  position: absolute;
  right: calc(100% + 10px);
  background-color: var(--color-navy);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translateX(6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.floating-btn:hover .floating-btn__tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* 11. Chân trang (Footer) nền Navy #0A1F44 */
.footer {
  background-color: var(--color-navy);
  color: var(--color-text-inverse);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
  margin-top: auto;
}

.footer__brand-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #FFFFFF;
  height: 54px;
  width: 168px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.footer__logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.32);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: var(--space-10);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(220, 231, 248, 0.14);
}

.footer__desc {
  color: rgba(255, 255, 255, 0.76);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
}

.footer__heading {
  color: var(--color-text-inverse);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  color: rgba(255, 255, 255, 0.76);
  font-size: var(--text-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-accent);
}

.footer__socials {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.footer__social-link {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-text-inverse);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.footer__social-link:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.footer__bottom {
  padding-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.65);
}