/* ============================================
   THỔ MOBI — Component Styles
   Luxury Dark Gold Design System
   ============================================ */

/* ---- HEADER ---- */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  height: var(--header-height);
  transition: box-shadow var(--transition-normal), height var(--transition-normal);
  border-bottom: 1px solid var(--color-border);
}

.header--scrolled {
  box-shadow: var(--shadow-header);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header__logo-img {
  height: 44px;
  width: auto;
  border-radius: var(--border-radius-md);
  background: transparent;
  padding: 0;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__nav-link {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.header__nav-link:hover {
  color: var(--color-primary);
}
.header__nav-link--active {
  color: var(--color-primary);
  position: relative;
}
.header__nav-link--active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

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


/* ---- HERO SECTION ---- */
.hero {
  background: linear-gradient(135deg, #0A0A0A 0%, #111111 40%, #0A0A0A 100%);
  padding: var(--space-12) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,95,191,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.hero__content {
  flex: 1;
  max-width: 560px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-bg);
  color: var(--color-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--border-radius-pill);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-4);
  color: var(--color-primary-dark);
  text-transform: uppercase;
}

.hero__title span {
  color: var(--color-danger);
}

.hero__subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.hero__cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__image {
  flex: 1;
  max-width: 480px;
  position: relative;
}

.hero__image img {
  width: 100%;
  border-radius: var(--border-radius-xl);
}

.hero__stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.hero__stat {
  text-align: center;
}

.hero__stat-number {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-danger);
}

.hero__stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ---- PROMO BANNER ---- */
.promo-banner {
  background: linear-gradient(135deg, var(--color-danger) 0%, #E53535 50%, #FF6B6B 100%);
  color: white;
  padding: var(--space-5) var(--space-6);
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: var(--space-6) auto;
  max-width: var(--container-max);
  cursor: pointer;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  box-shadow: 0 4px 15px rgba(204,27,27,0.25);
  transition: transform var(--transition-fast);
}

.promo-banner:hover {
  transform: translateY(-2px);
}

.promo-banner__text {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
}

.promo-banner__sub {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  margin-top: var(--space-1);
}

.promo-banner__arrow {
  font-size: var(--font-size-xl);
  transition: transform var(--transition-fast);
}
.promo-banner:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(204,27,27,0.35); }
.promo-banner:hover .promo-banner__arrow { transform: translateX(4px); }

/* ---- QUICK SELECT / PRODUCT CARDS ---- */
.quick-select {
  padding: var(--space-8) 0;
}

.quick-select__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
}

.product-card {
  background: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
  cursor: pointer;
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.product-card__image {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--color-bg);
  overflow: hidden;
}

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

.product-card:hover .product-card__image img {
  transform: scale(1.05);
}

.product-card__discount {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  background: var(--color-discount);
  color: white;
  padding: 2px var(--space-2);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.product-card__warranty {
  position: absolute;
  bottom: var(--space-2);
  right: var(--space-2);
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-primary);
  padding: 2px var(--space-2);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  display: flex;
  align-items: center;
  gap: 4px;
}

.product-card__body {
  padding: var(--space-4);
}

.product-card__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card__prices {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.product-card__price {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-danger);
}

.product-card__original-price {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: line-through;
}

/* ---- PROCESS SECTION ---- */
.process {
  background: var(--color-bg-white);
  padding: var(--space-12) 0;
}

.process__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  position: relative;
}

.process__step {
  text-align: center;
  position: relative;
}

.process__icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  position: relative;
}

.process__icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.process__number {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-danger);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
}

.process__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-1);
}

.process__desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Connector line between steps */
.process__step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 36px;
  left: calc(50% + 44px);
  width: calc(100% - 88px);
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-border-light));
  z-index: 0;
}

/* ---- VALUE PROPOSITIONS ---- */
.values {
  padding: var(--space-12) 0;
}

.values__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.value-card {
  background: var(--color-bg-white);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

.value-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.value-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-lg);
  background: var(--color-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.value-card__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.value-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
}

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

.value-card__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.value-card__item svg {
  width: 18px;
  height: 18px;
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ---- BRANDS SECTION ---- */
.brands {
  background: var(--color-bg-white);
  padding: var(--space-10) 0;
  text-align: center;
}

.brands__title {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-6);
}

.brands__grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  flex-wrap: wrap;
}

.brands__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  opacity: 0.6;
  transition: opacity var(--transition-fast);
  cursor: pointer;
}

.brands__item:hover {
  opacity: 1;
}

.brands__item svg,
.brands__item img {
  width: 48px;
  height: 48px;
}

.brands__item span {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- FOOTER ---- */
.footer {
  background: #060606;
  color: #AAAAAA;
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-10);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.footer__brand {
  margin-bottom: var(--space-4);
}

.footer__logo-img {
  height: 56px;
  width: auto;
  border-radius: var(--border-radius-md);
  background: transparent;
  padding: 0;
}

.footer__company {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-3);
  color: #8A8FA8;
}

.footer__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
}

.footer__info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.footer__info-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-primary);
}

.footer__heading {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: white;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.footer__link {
  font-size: var(--font-size-sm);
  color: #8A8FA8;
  transition: color var(--transition-fast);
}

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

.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

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

.footer__social-link svg {
  width: 20px;
  height: 20px;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  text-align: center;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.footer__copyright {
  font-size: var(--font-size-xs);
  color: #6B7080;
}

.footer__badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.footer__badge-img {
  height: 40px;
  opacity: 0.7;
}

/* ---- BOTTOM NAVIGATION (Mobile) ---- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background: var(--color-bg-white);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: var(--z-header);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.bottom-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-2);
  color: var(--color-text-muted);
  font-size: 10px;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  min-width: 64px;
}

.bottom-nav__item--active {
  color: var(--color-primary);
}

.bottom-nav__item svg {
  width: 24px;
  height: 24px;
}

/* ---- FAB (Floating Action Button) ---- */
.fab {
  position: fixed;
  bottom: 90px;
  right: 16px;
  z-index: var(--z-fab);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-danger);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(204, 27, 27, 0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(204, 27, 27, 0.5);
}

.fab svg {
  width: 24px;
  height: 24px;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 599px) {
  .hero__inner {
    flex-direction: column;
    text-align: center;
    padding: var(--space-6) var(--space-4);
  }

  .hero__subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__cta {
    justify-content: center;
  }

  .hero__image {
    max-width: 320px;
    margin: 0 auto;
  }

  .hero__stats {
    justify-content: center;
  }

  .process__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .process__step:not(:last-child)::after {
    display: none;
  }

  .values__grid {
    grid-template-columns: 1fr;
  }

  .quick-select__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .promo-banner {
    margin: var(--space-4) var(--space-4);
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }

  .brands__grid {
    gap: var(--space-6);
  }

  .fab {
    bottom: 80px;
    right: 10px;
  }
}

@media (min-width: 600px) and (max-width: 899px) {
  .hero__inner {
    flex-direction: column;
  }

  .process__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process__step:not(:last-child)::after {
    display: none;
  }

  .values__grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .header__inner {
    padding: 0 var(--space-8);
  }

  .hero__inner {
    padding: 0 var(--space-8);
  }

  .footer__inner {
    padding: 0 var(--space-8);
  }
}

/* ---- HEADER SEARCH ---- */
.header__search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--border-radius-pill);
  padding: var(--space-1) var(--space-3);
  color: rgba(255,255,255,0.7);
  transition: all var(--transition-fast);
  width: 200px;
}
.header__search:focus-within {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.4);
  width: 280px;
}
.header__search-input {
  background: none;
  border: none;
  color: #fff;
  font-size: var(--font-size-sm);
  width: 100%;
  outline: none;
}
.header__search-input::placeholder { color: rgba(255,255,255,0.5); }

.header__hotline svg { flex-shrink: 0; }

.header__darkmode {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: rgba(255,255,255,0.75);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.header__darkmode:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

/* ---- HERO STAT UNIT ---- */
.hero__stat {
  text-align: center;
}
.hero__stat-number {
  display: inline;
}
.hero__stat-unit {
  display: inline;
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-danger);
}
.hero__stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ---- TRUST STRIP ---- */
.trust-strip {
  background: var(--color-primary-dark);
  padding: var(--space-4) 0;
  overflow: hidden;
}
.trust-strip__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  flex-wrap: wrap;
}
.trust-strip__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: #fff;
  font-size: var(--font-size-sm);
  white-space: nowrap;
}
.trust-strip__item svg { color: var(--color-warning); flex-shrink: 0; }
.trust-strip__item strong { color: var(--color-warning); }

/* ---- SERVICE CATEGORIES ---- */
.categories { padding: var(--space-10) 0; }
.categories__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
}
.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-3);
  background: var(--color-bg-white);
  border-radius: var(--border-radius-xl);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
  text-align: center;
  cursor: pointer;
}
.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  color: var(--color-primary);
}
.category-card__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
}
.category-card__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  transition: transform var(--transition-normal);
}
.category-card:hover .category-card__icon svg { transform: scale(1.15); }
.category-card__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

/* ---- TESTIMONIALS ---- */
.testimonials {
  background: var(--color-primary-light);
}
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.testimonial-card {
  background: var(--color-bg-white);
  border-radius: var(--border-radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
  position: relative;
}
.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 12px;
  right: 20px;
  font-size: 60px;
  line-height: 1;
  color: var(--color-primary-light);
  font-family: Georgia, serif;
  pointer-events: none;
}
.testimonial-card:hover { box-shadow: var(--shadow-lg); border-color: var(--color-primary-light); }
.testimonial-card__stars {
  display: flex;
  gap: 2px;
  margin-bottom: var(--space-3);
}
.testimonial-card__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
  font-style: italic;
}
.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.testimonial-card__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
}
.testimonial-card__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}
.testimonial-card__service {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- STICKY CTA BAR (Mobile) ---- */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  z-index: var(--z-header);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
}
.sticky-cta__call {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  background: var(--color-primary-dark);
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
}
.sticky-cta__book {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-danger);
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* ---- PAGE TRANSITION ---- */
.fade-in { animation: fadeInUp 0.5s ease both; }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- DARK MODE ---- */
body.dark .header {
  background: #0D1020;
}
body.dark .process {
  background: var(--color-bg-white);
}
body.dark .brands {
  background: var(--color-bg-white);
}
body.dark .testimonials {
  background: #141828;
}
body.dark .trust-strip {
  background: #0D1020;
}
body.dark .footer {
  background: #0A0D18;
}
body.dark .header__logo-img {
  background: transparent;
  padding: 0;
}
body.dark .footer__logo-img {
  background: transparent;
}
body.dark .sticky-cta__call { background: #0D1020; }
body.dark .icon-sun { display: none !important; }
body.dark .icon-moon { display: block !important; }

/* ---- HAMBURGER MENU (Mobile) ---- */
.header__hamburger {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  z-index: calc(var(--z-modal) + 2);
}
.header__hamburger svg { width: 24px; height: 24px; }

.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: #0A0A0A;
  z-index: calc(var(--z-modal) + 1);
  padding: 80px var(--space-6) var(--space-8);
  transition: right 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.mobile-nav--open { right: 0; }
.mobile-nav__overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: var(--z-modal);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-nav__overlay--open { opacity: 1; pointer-events: auto; }
.mobile-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  color: rgba(255,255,255,0.65);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius-md);
  min-height: 44px;
  transition: all var(--transition-fast);
  transition: all var(--transition-fast);
}
.mobile-nav__link:hover { color: #fff; background: rgba(255,255,255,0.08); }
.mobile-nav__link--active {
  color: #fff;
  background: rgba(37,99,235,0.25);
  border-left: 3px solid var(--color-danger);
  padding-left: calc(var(--space-4) - 3px);
}
.mobile-nav__link svg { width: 20px; height: 20px; flex-shrink: 0; }
.mobile-nav__divider {
  height: 1px;
  background: rgba(255,255,255,0.1);
  margin: var(--space-3) 0;
}

/* ---- ZALO CHAT WIDGET ---- */
.zalo-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: var(--z-fab);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #0068FF;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,104,255,0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
  animation: zalo-pulse 2s infinite;
}
.zalo-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(0,104,255,0.5);
  color: white;
}
@keyframes zalo-pulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(0,104,255,0.4); }
  50% { box-shadow: 0 4px 24px rgba(0,104,255,0.6), 0 0 0 8px rgba(0,104,255,0.1); }
}
.zalo-fab svg { width: 28px; height: 28px; }

/* ---- BACK TO TOP ---- */
.back-to-top {
  position: fixed;
  bottom: 90px;
  right: 24px;
  z-index: var(--z-fab);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}
.back-to-top--visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
}
.back-to-top svg { width: 20px; height: 20px; }

/* ---- FAQ ACCORDION ---- */
.faq { padding: var(--space-12) 0; }
.faq__list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.faq__item {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-fast);
}
.faq__item:hover { border-color: var(--color-primary); }
.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  text-align: left;
  cursor: pointer;
  gap: var(--space-3);
}
.faq__question svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform 0.3s ease;
}
.faq__item--open .faq__question svg { transform: rotate(180deg); }
.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.faq__answer-inner {
  padding: 0 var(--space-5) var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ---- SHARE BUTTONS ---- */
.share-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.share-buttons__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}
.share-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: all var(--transition-fast);
  cursor: pointer;
}
.share-btn:hover { transform: scale(1.1); color: #fff; }
.share-btn svg { width: 18px; height: 18px; }
.share-btn--facebook { background: #1877F2; }
.share-btn--zalo { background: #0068FF; }
.share-btn--copy { background: var(--color-text-muted); }
.share-btn--copy.copied { background: var(--color-success); }

/* ---- COUNTDOWN TIMER ---- */
.product-card__countdown {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 2px var(--space-2);
  border-radius: var(--border-radius-sm);
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-heading);
  display: flex;
  align-items: center;
  gap: 4px;
}
.product-card__countdown svg { width: 12px; height: 12px; }

/* ---- LOCATION BADGE ---- */
.location-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-success);
  color: #fff;
  padding: 2px var(--space-2);
  border-radius: var(--border-radius-sm);
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
}
.location-badge svg { width: 12px; height: 12px; }
.product-card__body .location-badge { margin-bottom: var(--space-2); }

/* ---- IMAGE SKELETON LOADING ---- */
.skeleton-loading {
  background: linear-gradient(90deg, var(--color-bg) 25%, var(--color-border-light) 50%, var(--color-bg) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.2s infinite;
  border-radius: var(--border-radius-lg);
}
@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- PRELOADER ---- */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-4);
  transition: opacity 0.4s ease;
}
.preloader--hidden {
  opacity: 0;
  pointer-events: none;
}
.preloader__spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.preloader__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ---- SHRINKING HEADER ---- */
.header--shrink {
  height: 48px;
}
.header--shrink .header__logo-img {
  height: 32px;
}

/* ---- IMAGE CAROUSEL (Detail) ---- */
.detail__carousel {
  position: relative;
}
.detail__carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  z-index: 2;
  transition: all var(--transition-fast);
}
.detail__carousel-btn:hover {
  background: #fff;
  box-shadow: var(--shadow-lg);
}
.detail__carousel-btn--prev { left: var(--space-3); }
.detail__carousel-btn--next { right: var(--space-3); }
.detail__carousel-btn svg { width: 18px; height: 18px; }

/* ---- RESPONSIVE additions ---- */
@media (max-width: 599px) {
  .header__hamburger { display: flex; }
  .trust-strip__inner { gap: var(--space-4); justify-content: flex-start; flex-wrap: nowrap; animation: scrollLeft 15s linear infinite; }
  @keyframes scrollLeft {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
  }
  .categories__grid { grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
  .category-card { padding: var(--space-3) var(--space-2); }
  .category-card__icon { width: 44px; height: 44px; }
  .category-card__icon svg { width: 22px; height: 22px; }
  .category-card__label { font-size: var(--font-size-xs); }
  .testimonials__grid { grid-template-columns: 1fr; }
  .hero__stats { gap: var(--space-4); }
  .bottom-nav { display: none !important; }
  .zalo-fab { bottom: 70px; right: 16px; width: 48px; height: 48px; }
  .back-to-top { bottom: 126px; right: 16px; width: 38px; height: 38px; }
  .breadcrumb { font-size: var(--font-size-xs); overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch; }
}

@media (min-width: 600px) and (max-width: 899px) {
  .categories__grid { grid-template-columns: repeat(3, 1fr); }
  .testimonials__grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 600px) {
  .sticky-cta { display: none !important; }
}

/* ---- PAGE TRANSITION ---- */
.page-transition { animation: pageFadeIn 0.4s ease-out; }
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- TOAST NOTIFICATION ---- */
.toast-container {
  position: fixed;
  top: calc(var(--header-height) + var(--space-4));
  right: var(--space-4);
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--border-radius-lg);
  background: var(--color-bg-white);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--color-success);
  font-size: clamp(0.875rem, 2vw, 1rem);
  color: var(--color-text-primary);
  pointer-events: auto;
  animation: toastIn 0.3s ease-out;
  max-width: 400px;
}
.toast--error { border-left-color: var(--color-error); }
.toast--info { border-left-color: var(--color-primary); }
.toast__icon { flex-shrink: 0; width: 20px; height: 20px; }
.toast__icon--success { color: var(--color-success); }
.toast__icon--error { color: var(--color-error); }
.toast__icon--info { color: var(--color-primary); }
.toast__close {
  margin-left: auto;
  padding: var(--space-1);
  color: var(--color-text-muted);
  cursor: pointer;
  flex-shrink: 0;
}
.toast--out { animation: toastOut 0.3s ease-in forwards; }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(100%); }
}

/* ---- SCROLL PROGRESS BAR ---- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-danger));
  z-index: calc(var(--z-header) + 1);
  width: 0%;
  transition: width 0.1s linear;
}

/* ---- COOKIE CONSENT ---- */
.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-text-primary);
  color: #C8CCD8;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  z-index: 9997;
  transform: translateY(100%);
  transition: transform 0.4s ease;
  flex-wrap: wrap;
}
.cookie-consent--visible { transform: translateY(0); }
.cookie-consent__text {
  font-size: var(--font-size-sm);
  flex: 1;
  min-width: 200px;
}
.cookie-consent__text a { color: var(--color-primary); text-decoration: underline; }
.cookie-consent__actions { display: flex; gap: var(--space-2); flex-shrink: 0; }

/* ---- BOOKING MODAL ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay--open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--color-bg-white);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform 0.3s ease;
  position: relative;
}
.modal-overlay--open .modal { transform: scale(1) translateY(0); }
.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.modal__close:hover { background: var(--color-bg); color: var(--color-text-primary); }
.modal__close:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.modal__close svg { width: 20px; height: 20px; }
.modal__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-2);
}
.modal__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

/* ---- ANIMATED HERO BACKGROUND ---- */
.hero__shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero__shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
  background: var(--color-primary);
}
.hero__shape:nth-child(1) { width: 200px; height: 200px; top: 10%; left: 5%; animation: floatShape 8s ease-in-out infinite; }
.hero__shape:nth-child(2) { width: 150px; height: 150px; top: 60%; right: 10%; animation: floatShape 10s ease-in-out infinite reverse; }
.hero__shape:nth-child(3) { width: 100px; height: 100px; bottom: 15%; left: 30%; animation: floatShape 12s ease-in-out infinite; }
.hero__shape:nth-child(4) { width: 80px; height: 80px; top: 20%; right: 30%; animation: floatShape 9s ease-in-out infinite reverse; background: var(--color-danger); }
@keyframes floatShape {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(15px, -20px); }
  50% { transform: translate(-10px, 15px); }
  75% { transform: translate(20px, 10px); }
}

/* ---- KEYBOARD FOCUS STYLES ---- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
  outline: none;
}

/* ---- SEARCH AUTOCOMPLETE ---- */
.search-autocomplete {
  position: relative;
}
.autocomplete-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-top: none;
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 50;
  display: none;
  max-height: 300px;
  overflow-y: auto;
}
.autocomplete-dropdown--open { display: block; }
.autocomplete-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.autocomplete-item:hover,
.autocomplete-item--active { background: var(--color-primary-bg); }
.autocomplete-item__icon { color: var(--color-text-muted); flex-shrink: 0; }
.autocomplete-item__price {
  margin-left: auto;
  color: var(--color-danger);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-xs);
}

/* ---- STICKY DETAIL CTA (Mobile) ---- */
.detail-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: none;
  justify-content: space-between;
  z-index: var(--z-header);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
  background: var(--color-bg-white);
  padding: var(--space-3) var(--space-4);
  gap: var(--space-3);
  align-items: center;
}
.detail-sticky-cta__price {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-danger);
  white-space: nowrap;
}
.detail-sticky-cta__btn {
  flex: 1;
}

/* ---- BLUR-UP IMAGE LOADING ---- */
.blur-up {
  filter: blur(15px);
  transition: filter 0.5s ease;
}
.blur-up--loaded { filter: blur(0); }

/* ---- TESTIMONIALS CAROUSEL (Mobile) ---- */
@media (max-width: 599px) {
  .testimonials__grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: var(--space-4);
    padding-bottom: var(--space-4);
    scrollbar-width: none;
  }
  .testimonials__grid::-webkit-scrollbar { display: none; }
  .testimonial-card {
    flex: 0 0 85%;
    scroll-snap-align: center;
  }
  .detail-sticky-cta { display: flex; }
  .cookie-consent { padding-bottom: calc(var(--space-4) + 56px); }
}

/* ---- GRADIENT SECTION TITLES — Gold ---- */
.section__title {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-heading);
  letter-spacing: 0.03em;
}

/* ---- PRODUCT CARD HOVER LIFT ---- */
.product-card {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
@media (hover: hover) {
  .product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
  }
}

/* ---- CATEGORY CARD HOVER LIFT ---- */
.category-card {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
@media (hover: hover) {
  .category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
}

/* ---- FOOTER SKELETON ---- */
.footer--skeleton {
  padding: var(--space-8) var(--space-4);
}
.footer-skeleton__row {
  display: flex;
  gap: var(--space-8);
  max-width: var(--container-max);
  margin: 0 auto;
}
.footer-skeleton__block {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-skeleton__line {
  height: 14px;
  border-radius: var(--border-radius-sm);
  background: linear-gradient(90deg, var(--color-border-light) 25%, var(--color-bg) 50%, var(--color-border-light) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}
.footer-skeleton__line--short { width: 60%; }
.footer-skeleton__line--medium { width: 80%; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
@media (max-width: 599px) {
  .footer-skeleton__row { flex-direction: column; }
}

/* ---- POST CARD (Blog/News) ---- */
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  text-decoration: none;
  color: inherit;
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: inherit;
}
.post-card__image { aspect-ratio: 16/9; overflow: hidden; }
.post-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
.post-card:hover .post-card__image img { transform: scale(1.05); }
.post-card__body { padding: var(--space-4); flex: 1; display: flex; flex-direction: column; }
.post-card__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-transform: none;
  letter-spacing: 0;
}
.post-card__excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.post-card__meta {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Post grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
}
@media (max-width: 599px) {
  .post-grid { grid-template-columns: 1fr; }
  .post-card__image { aspect-ratio: 16/9; }
}

/* ---- POST DETAIL ---- */
/* ---- POST DETAIL — International Typography Standards ---- */
.post-detail {
  max-width: 720px; /* 65-75 chars per line for optimal readability */
  margin: 0 auto;
  padding-bottom: var(--space-8);
}
.post-detail__header { margin-bottom: var(--space-8); }
.post-detail__title {
  font-family: var(--font-primary);
  font-size: clamp(1.75rem, 4vw, 2.5rem); /* 28-40px responsive */
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  text-transform: none;
  letter-spacing: -0.02em;
  line-height: 1.2;
  word-break: keep-all;
}
.post-detail__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
}
.post-detail__meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}
.post-detail__meta a { color: var(--color-primary); }
.post-detail__image {
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-8);
  aspect-ratio: 16/9;
}
.post-detail__image img { width: 100%; height: 100%; object-fit: cover; }

/* ---- Content Typography (chuẩn quốc tế: 18px body, 1.8 line-height) ---- */
.post-detail__content {
  font-size: clamp(1.0625rem, 1.8vw, 1.125rem); /* 17-18px responsive */
  line-height: 1.8;
  color: var(--color-text-primary);
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* Heading scale: Major Third (1.25) */
.post-detail__content h2 {
  font-family: var(--font-primary);
  font-size: clamp(1.375rem, 3vw, 1.625rem); /* 22-26px */
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-top: 2.5em;
  margin-bottom: 0.75em;
  letter-spacing: -0.01em;
  line-height: 1.3;
  padding-bottom: 0.4em;
  border-bottom: 2px solid var(--color-border-light);
}
.post-detail__content h3 {
  font-family: var(--font-primary);
  font-size: clamp(1.125rem, 2.5vw, 1.375rem); /* 18-22px */
  font-weight: 600;
  color: var(--color-text-primary);
  margin-top: 2em;
  margin-bottom: 0.5em;
  line-height: 1.35;
}
.post-detail__content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

/* Paragraph spacing */
.post-detail__content p {
  margin-bottom: 1.5em;
}
.post-detail__content p + p { margin-top: 0; }

/* Lists */
.post-detail__content ul, .post-detail__content ol {
  margin-bottom: 1.5em;
  padding-left: 1.75em;
}
.post-detail__content ul { list-style: disc; }
.post-detail__content ol { list-style: decimal; }
.post-detail__content li {
  margin-bottom: 0.5em;
  line-height: 1.7;
}
.post-detail__content li::marker { color: var(--color-primary); }

/* Blockquote — editorial style */
.post-detail__content blockquote {
  margin: 2em 0;
  padding: 1.25em 1.5em;
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-bg);
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
  font-size: 0.95em;
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.post-detail__content blockquote strong { color: var(--color-text-primary); }
.post-detail__content blockquote em { color: var(--color-text-muted); font-size: 0.9em; }

/* Tables — responsive */
.post-detail__content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9375rem;
  line-height: 1.5;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.post-detail__content thead { background: var(--color-bg); }
.post-detail__content th {
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  padding: 0.75em 1em;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}
.post-detail__content td {
  padding: 0.75em 1em;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: top;
}
.post-detail__content tr:hover td { background: var(--color-primary-bg); }
.post-detail__content td:first-child { font-weight: 500; }

/* Images */
.post-detail__content img {
  border-radius: var(--border-radius-lg);
  margin: 1.5em 0;
  max-width: 100%;
  height: auto;
}

/* Links */
.post-detail__content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}
.post-detail__content a:hover { color: var(--color-primary-hover); }

/* Code */
.post-detail__content code {
  font-family: 'SF Mono', 'JetBrains Mono', monospace;
  font-size: 0.875em;
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-danger);
}
.post-detail__content pre {
  background: var(--color-text-primary);
  color: #e8edf5;
  padding: 1.25em 1.5em;
  border-radius: var(--border-radius-lg);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 1.5em 0;
}
.post-detail__content pre code { background: none; color: inherit; padding: 0; }

/* Strong / Bold emphasis */
.post-detail__content strong { font-weight: 600; color: var(--color-text-primary); }

/* Horizontal rule */
.post-detail__content hr {
  border: none;
  height: 1px;
  background: var(--color-border-light);
  margin: 2.5em 0;
}

/* Author box responsive */
.author-box { flex-wrap: wrap; }

/* Related posts */
.related-posts { margin-top: var(--space-12); }

/* Mobile adjustments */
@media (max-width: 640px) {
  .post-detail__title { font-size: 1.625rem; }
  .post-detail__content { font-size: 1rem; line-height: 1.75; }
  .post-detail__content h2 { font-size: 1.25rem; margin-top: 2em; }
  .post-detail__content h3 { font-size: 1.125rem; }
  .post-detail__content blockquote { padding: 1em; margin: 1.5em 0; }
  .post-detail__content table { font-size: 0.8125rem; }
  .post-detail__content th, .post-detail__content td { padding: 0.5em 0.75em; }
  .post-detail__meta { font-size: 0.8125rem; }
}

/* ---- BUTTON RIPPLE EFFECT ---- */
.btn { position: relative; overflow: hidden; }
.btn__ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  transform: scale(0);
  animation: btnRipple 0.6s ease-out forwards;
  pointer-events: none;
}
@keyframes btnRipple {
  to { transform: scale(4); opacity: 0; }
}

/* ---- IMAGE LIGHTBOX ---- */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: calc(var(--z-modal) + 10);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  cursor: zoom-out;
}
.lightbox-overlay--open { opacity: 1; pointer-events: auto; }
.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--border-radius-lg);
  object-fit: contain;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}
.lightbox-overlay--open img { transform: scale(1); }
.lightbox__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.15);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.15);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox__nav--prev { left: var(--space-4); }
.lightbox__nav--next { right: var(--space-4); }

/* ---- SMOOTH DARK MODE TRANSITION ---- */
body {
  transition: background-color 0.3s ease, color 0.3s ease;
}
.header, .footer, .product-card, .modal, .cookie-consent, .mobile-nav {
  transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

/* ---- IMAGE ERROR FALLBACK ---- */
.img-error-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-bg);
  color: var(--color-text-muted);
  min-height: 120px;
}

/* ---- HORIZONTAL SCROLL SNAP (Mobile Product Cards) ---- */
@media (max-width: 599px) {
  .quick-select__grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: var(--space-4);
    padding-bottom: var(--space-3);
    scrollbar-width: none;
  }
  .quick-select__grid::-webkit-scrollbar { display: none; }
  .quick-select__grid > .product-card {
    flex: 0 0 75%;
    scroll-snap-align: start;
  }
}

/* ---- TYPED TEXT CURSOR ---- */
.typed-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--color-danger);
  margin-left: 2px;
  animation: cursorBlink 0.8s infinite;
  vertical-align: text-bottom;
}
@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ---- CONTENT VISIBILITY (Performance) ---- */
.section, .related, .faq, .footer {
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}

/* ---- FORM LOADING SPINNER ---- */
.btn--loading {
  pointer-events: none;
  opacity: 0.8;
}
.btn--loading .btn__spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: var(--space-2);
  vertical-align: middle;
}

/* ---- ZALO FAB PULSE ---- */
.zalo-fab::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  animation: fabPulse 2s infinite;
  pointer-events: none;
}
@keyframes fabPulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}
.zalo-fab { position: relative; }

/* ---- PARALLAX HERO (subtle) ---- */
.hero__image { will-change: transform; }

/* ---- SCROLL REVEAL ANIMATIONS ---- */
.section { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.section--visible { opacity: 1; transform: translateY(0); }

/* ---- LOADING PULSE for skeleton ---- */
@keyframes loadingPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
.loading-pulse { animation: loadingPulse 1.5s ease-in-out infinite; }

/* ---- FOCUS RING (Accessibility) ---- */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---- SMOOTH LINK UNDERLINE ---- */
.footer__link, .breadcrumb__link {
  position: relative;
}
.footer__link::after, .breadcrumb__link::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--transition-fast);
}
.footer__link:hover::after, .breadcrumb__link:hover::after { width: 100%; }

/* ---- PRINT STYLES ---- */
@media print {
  .header, .footer, .sticky-cta, .zalo-fab, .back-to-top, .mobile-nav, .mobile-nav__overlay,
  .bottom-nav, .preloader, .hero__cta, .detail__actions { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .hero { background: #fff !important; padding: 20px 0; }
  .product-card { break-inside: avoid; box-shadow: none; border: 1px solid #ccc; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 10pt; color: #666; }
  .container { max-width: 100%; padding: 0; }
}