/* ==========================================================================
   FILE: css/components.css
   MÔ TẢ: Giao diện các thành phần dùng chung: Preloader, Header cố định thu nhỏ
          khi cuộn, Bộ chọn ngôn ngữ, Menu Mobile toàn màn hình, Footer pháp lý,
          Nút nổi Gọi ngay/Zalo, Thẻ (Card) và Hộp thoại Modal/Lightbox.
   ========================================================================== */

/* --- 1. PRELOADER --- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: var(--z-preloader);
  background-color: var(--color-bg-warm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  transition: opacity 0.45s var(--ease-out), visibility 0.45s var(--ease-out);
}

.preloader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader__logo-wrap {
  position: relative;
  width: 96px;
  height: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preloader__ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 3px solid var(--color-accent-soft);
  border-top-color: var(--color-primary);
  border-right-color: var(--color-accent);
  animation: preloaderSpin 1.1s linear infinite;
}

.preloader__logo {
  width: 78px;
  height: 78px;
  object-fit: contain;
  border-radius: 50%;
}

.preloader__text {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  font-size: var(--text-sm);
  text-transform: uppercase;
}

@keyframes preloaderSpin {
  to { transform: rotate(360deg); }
}

/* --- 2. HEADER CỐ ĐỊNH (THU NHỎ KHI CUỘN) --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: height var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

.site-header.is-scrolled {
  height: var(--header-height-scrolled);
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.brand-logo__img {
  width: 54px;
  height: 54px;
  object-fit: contain;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  background-color: var(--color-primary);
  transition: width var(--transition-base), height var(--transition-base), transform var(--transition-fast);
}

.site-header.is-scrolled .brand-logo__img {
  width: 44px;
  height: 44px;
}

.brand-logo:hover .brand-logo__img {
  transform: scale(1.04);
}

.brand-logo__text {
  display: flex;
  flex-direction: column;
}

.brand-logo__title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(1.05rem, 1.4vw, 1.3rem);
  color: var(--color-primary);
  line-height: 1.15;
}

.brand-logo__subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

/* Điều hướng chính trên Desktop */
.main-nav {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

@media (min-width: 1024px) {
  .main-nav {
    display: flex;
  }
}

.main-nav__link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  padding-block: var(--space-2);
  transition: color var(--transition-fast);
}

.main-nav__link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2.5px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
  border-radius: 2px;
}

.main-nav__link:hover,
.main-nav__link.is-active {
  color: var(--color-primary);
}

.main-nav__link:hover::after,
.main-nav__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Khu vực hành động bên phải Header */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Bộ chọn ngôn ngữ VI | EN | 中文 */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-bg-warm);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-switcher__btn {
  min-height: 32px;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

.lang-switcher__btn.is-active {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.header-cta {
  display: none;
}

@media (min-width: 1200px) {
  .header-cta {
    display: inline-flex;
  }
}

/* Nút Hamburger mở Menu Mobile (tối thiểu 44x44px) */
.menu-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background-color: var(--color-bg-warm);
  color: var(--color-primary);
}

@media (min-width: 1024px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle__bar {
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- 3. MENU MOBILE TOÀN MÀN HÌNH --- */
.mobile-drawer {
  position: fixed;
  inset: 0;
  top: var(--header-height);
  z-index: var(--z-drawer);
  background-color: var(--color-bg);
  padding: var(--space-6) var(--container-pad);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--transition-base), visibility var(--transition-base);
  overflow-y: auto;
}

.site-header.is-scrolled ~ .mobile-drawer {
  top: var(--header-height-scrolled);
}

.mobile-drawer.is-open {
  transform: translateX(0);
  visibility: visible;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.mobile-nav__link.is-active {
  background-color: var(--color-accent-soft);
  color: var(--color-primary);
}

.mobile-drawer__footer {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* --- 4. THẺ (CARD) DÙNG CHUNG --- */
.card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-bg-warm);
}

.card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card__img {
  transform: scale(1.06);
}

.card__badges {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  z-index: 2;
}

.card__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card__title {
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.card__desc {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  flex: 1;
}

/* --- 5. BANNER CTA DÙNG CHUNG --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: clamp(2.25rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 2px solid rgba(245, 190, 26, 0.35);
}

.cta-banner::before {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 190, 26, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
}

@media (min-width: 1024px) {
  .cta-banner__inner {
    flex-direction: row;
    align-items: center;
  }
}

.cta-banner__title {
  color: #FFFFFF;
  margin-bottom: var(--space-2);
}

.cta-banner__desc {
  color: rgba(255, 251, 242, 0.9);
  font-size: var(--text-lg);
  max-width: 640px;
}

.cta-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* --- 6. FOOTER CÓ THÔNG TIN PHÁP LÝ RÕ RÀNG --- */
.site-footer {
  background-color: var(--color-primary-dark);
  color: var(--color-text-light);
  padding-top: clamp(3.5rem, 6vw, 5rem);
  border-top: 4px solid var(--color-accent);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid rgba(255, 251, 242, 0.14);
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  }
}

.footer-brand__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-brand__logo {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  object-fit: contain;
  background-color: var(--color-primary);
}

.footer-brand__name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  color: #FFFFFF;
}

.footer-brand__legal-name {
  font-size: var(--text-xs);
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.footer-col__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: #FFFFFF;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

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

.footer-links__item a {
  color: rgba(255, 251, 242, 0.84);
  font-size: var(--text-sm);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-links__item a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-legal-box {
  background-color: rgba(46, 26, 16, 0.45);
  border: 1px solid rgba(245, 190, 26, 0.35);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-size: var(--text-xs);
  line-height: 1.6;
}

.footer-legal-box p {
  margin-bottom: var(--space-2);
}

.footer-legal-box strong {
  color: var(--color-accent);
}

.site-footer__bottom {
  padding-block: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255, 251, 242, 0.75);
  text-align: center;
}

@media (min-width: 768px) {
  .site-footer__bottom {
    flex-direction: row;
    text-align: left;
  }
}

/* --- 7. NÚT NỔI GỌI NGAY & ZALO TRÊN MOBILE/TABLET --- */
.floating-cta {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: var(--z-floating);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.floating-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--text-xs);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-fast);
}

.floating-cta__btn:hover {
  transform: translateY(-3px) scale(1.03);
}

.floating-cta__btn--zalo {
  background-color: #0068FF;
  color: #FFFFFF;
}

.floating-cta__btn--call {
  background-color: var(--color-accent);
  color: var(--color-text);
  border: 2px solid var(--color-primary);
}

/* --- 8. MODAL & LIGHTBOX DÙNG CHUNG --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background-color: rgba(46, 26, 16, 0.75);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.modal-dialog {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 760px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--color-accent);
  transform: translateY(24px) scale(0.96);
  transition: transform var(--transition-base);
  position: relative;
}

.modal-backdrop.is-open .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.92);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  z-index: 5;
  box-shadow: var(--shadow-sm);
}

.modal-close:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
}