/* ==========================================================================
   Ghế Thông Minh ROOKY - VIETNAMESE LANDING PAGE STYLESHEET
   Design System: Kids Ergonomic Chair - Modern, Warm, Playful & Premium
   Distributor: Rồng Phương Bắc (243 Bến Vân Đồn, P. Vĩnh Hội, TP.HCM)
   ========================================================================== */

:root {
  /* Brand Colors */
  --primary-yellow: #FABA19;
  --primary-orange: #FF7B00;
  --primary-gradient: linear-gradient(135deg, #FABA19 0%, #FF7B00 100%);
  --brand-teal: #2EBDBC;
  --brand-teal-dark: #1E8F8E;
  --brand-green: #61AC58;
  --brand-magenta: #D83D76;
  --brand-blue: #4A87CB;
  --brand-navy: #1A365D;

  /* Neutral Colors */
  --color-bg: #FFFFFF;
  --color-bg-warm: #FAF6EF;
  --color-bg-subtle: #F5EFE4;
  --color-card-bg: #FFFFFF;
  --text-dark: #1E293B;
  --text-body: #475569;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --border-light: #E2E8F0;
  --border-warm: #EADBCC;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 36px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(30, 41, 59, 0.08);
  --shadow-lg: 0 16px 36px rgba(250, 186, 25, 0.16);
  --shadow-float: 0 20px 40px rgba(0, 0, 0, 0.12);

  /* Typography */
  --font-heading: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Layout */
  --max-width: 1240px;
  --header-height: 80px;
}

/* Reset & Base Setup */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text-dark);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 2;
}

.relative {
  position: relative !important;
}

.section-padding {
  position: relative;
  overflow: hidden;
  padding-top: 96px;
  padding-bottom: 96px;
}

.section-padding>.container {
  position: relative;
  z-index: 2;
}

@media (max-width: 768px) {
  .section-padding {
    padding-top: 60px;
    padding-bottom: 60px;
  }
}

.text-center {
  text-align: center;
}

.highlight-green {
  color: var(--brand-green);
}

.highlight-teal {
  color: var(--brand-teal);
}

.highlight-yellow {
  color: var(--primary-yellow);
}

.highlight-orange {
  color: var(--primary-orange);
}

/* Badges */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.badge-yellow {
  background: rgba(250, 186, 25, 0.2);
  color: #B45309;
}

.badge-teal {
  background: rgba(46, 189, 188, 0.15);
  color: #0F766E;
}

.badge-white {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-dark);
  box-shadow: var(--shadow-sm);
}

/* Section Header standard */
.section-head {
  max-width: 760px;
  margin: 0 auto 56px auto;
  text-align: center;
}

.section-title {
  font-size: 2.5rem;
  margin-top: 12px;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-body);
  font-weight: 400;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.95rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }
}

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  border: none;
  transition: transform 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.25s ease, background-color 0.25s ease;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--primary-gradient);
  color: #FFFFFF;
  box-shadow: 0 8px 20px rgba(255, 123, 0, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 12px 28px rgba(255, 123, 0, 0.45);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--text-dark);
  border: 2px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--primary-yellow);
  color: #B45309;
}

.btn-dark {
  background: var(--text-dark);
  color: #FFFFFF;
}

.btn-dark:hover {
  background: #0F172A;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.25);
}

.btn-teal {
  background: var(--brand-teal);
  color: #FFFFFF;
  box-shadow: 0 8px 20px rgba(46, 189, 188, 0.35);
}

.btn-teal:hover {
  background: var(--brand-teal-dark);
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}

.logo-group {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-group .brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.logo-group .brand-link:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.logo-group .brand-logo {
  height: 48px;
  width: auto;
  display: block;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 1.8vw, 28px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-dark);
  position: relative;
  padding: 8px 0;
  transition: color 0.25s ease;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-orange);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--primary-orange);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 3px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.header-action-divider {
  width: 1px;
  height: 24px;
  background-color: var(--border-light);
}

/* ==========================================================================
   LANGUAGE DROPDOWN SWITCHER (Globe + VN/EN + Dropdown Menu)
   Frameless design matching header background
   ========================================================================== */
.lang-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 6px 4px;
  cursor: pointer;
  color: #111827;
  font-family: var(--font-heading);
  transition: opacity 0.2s ease;
  line-height: 1;
  user-select: none;
}

.lang-dropdown-btn:hover {
  opacity: 0.8;
  background: transparent !important;
}

.lang-dropdown.open .lang-dropdown-btn {
  opacity: 1;
  background: transparent !important;
}

.lang-globe-icon {
  width: 20px;
  height: 20px;
  stroke: #111827;
  flex-shrink: 0;
}

.lang-current-code {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #111827;
}

.lang-chevron-icon {
  width: 14px;
  height: 14px;
  stroke: #111827;
  stroke-width: 2.6;
  flex-shrink: 0;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.lang-dropdown:hover .lang-chevron-icon,
.lang-dropdown.open .lang-chevron-icon {
  transform: rotate(180deg);
}

.lang-dropdown-btn:focus-visible {
  outline: 2px solid #111827;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Dropdown Menu - Seamless matching header background, no heavy borders */
.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 155px;
  background: #FFFFFF;
  border: none;
  border-radius: 8px;
  padding: 6px;
  box-shadow: 0 10px 25px -4px rgba(0, 0, 0, 0.1), 0 4px 8px -2px rgba(0, 0, 0, 0.04);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 2px;
  
  /* Smooth Fade & Slide Animation */
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

/* Invisible bridge so mouse does not lose hover across the gap */
.lang-dropdown-menu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
  display: block;
}

.lang-dropdown:hover .lang-dropdown-menu,
.lang-dropdown.open .lang-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.lang-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  color: #1E293B;
  transition: all 0.18s ease;
  user-select: none;
}

.lang-dropdown-item:hover {
  background: #F1F5F9;
  color: #0F172A;
}

.lang-dropdown-item.active {
  background: #F8FAFC;
  color: #0F172A;
  font-weight: 700;
}

.lang-flag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 15px;
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
  background-color: #E2E8F0;
}

.lang-flag-svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.lang-name {
  flex: 1;
  white-space: nowrap;
}

.hotline-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.98rem;
  color: #DC2626;
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.16);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: all 0.25s ease;
  white-space: nowrap;
}

.hotline-link:hover {
  background: rgba(220, 38, 38, 0.16);
  border-color: rgba(220, 38, 38, 0.32);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.15);
}

.header-cta-btn {
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(227, 113, 0, 0.25);
  transition: all 0.25s ease;
}

.header-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(227, 113, 0, 0.35);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dark);
  cursor: pointer;
  padding: 4px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  background-color: #FE5735;
  background-image: url("../assets/images/hero-stroke.svg"), var(--primary-gradient);
  background-size: cover, 100% 100%;
  background-position: center, center;
  background-repeat: no-repeat;
  padding-top: 48px;
  padding-bottom: 96px;
  overflow: hidden;
  color: #FFFFFF;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 2;
}

.hero-tagline {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: #FFF3C4;
  margin-bottom: 22px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.5rem;
  color: #FFFFFF;
  line-height: 1.15;
  margin-bottom: 20px;
  font-weight: 800;
}

.hero-title .title-callout {
  display: inline-block;
  background: #FFFFFF;
  color: #E37100;
  padding: 2px 16px;
  border-radius: var(--radius-lg);
  margin-top: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

html[lang="en"] .hero-title .title-callout {
  display: none !important;
}

.hero-subhead {
  font-size: 1.4rem;
  font-family: var(--font-heading);
  color: #FFFFFF;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.35;
}

.hero-description {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 36px;
  max-width: 580px;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-btn-primary {
  background: #FFFFFF;
  color: #E37100;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.hero-btn-primary:hover {
  background: #FFFBF0;
  color: #C05600;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.25);
}

.hero-btn-outline {
  background: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  border: 2px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
}

.hero-btn-outline:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: #FFFFFF;
}

.hero-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-main-chair {
  width: 100%;
  max-width: 540px;
  filter: drop-shadow(0 25px 35px rgba(0, 0, 0, 0.2));
  animation: gentleFloat 6s ease-in-out infinite;
}

@keyframes gentleFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-12px);
  }
}

/* ==================== GLOBAL DOODLE SYSTEM (MERRYFAIR CUTE ICONS) ==================== */
.doodle {
  position: absolute;
  pointer-events: none;
  user-select: none;
  z-index: 0 !important;
  transition: transform 0.3s ease;
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.08));
  opacity: 1;
}

/* Header Highlights (Icons/Sparkles accenting titles) */
.hero-title .relative,
.section-title .relative,
.highlight-orange.relative,
.highlight-green.relative {
  position: relative !important;
  display: inline-block;
  z-index: 1;
  isolation: isolate;
}

.header-highlight-left {
  position: absolute;
  left: -28px;
  top: 4px;
  width: 32px;
  height: auto;
  transform: translateY(-20%);
  pointer-events: none;
  user-select: none;
  z-index: -1 !important;
}

.header-highlight-right {
  position: absolute;
  right: -42px;
  top: 14px;
  width: 36px;
  height: auto;
  transform: translateY(-50%) rotate(5deg);
  pointer-events: none;
  user-select: none;
  z-index: -1 !important;
}

/* Hero Section Doodles */
.doodle-hero-rocket {
  top: -28px;
  left: -15px;
  width: 100px;
  animation: floatRocket 6s ease-in-out infinite;
}

.doodle-hero-sun {
  top: 1%;
  right: 1.5%;
  width: 175px;
  animation: pulseSun 5s ease-in-out infinite;
}

.doodle-hero-star {
  top: 48%;
  left: 1.2%;
  width: 85px;
  animation: spinStarSlow 8s ease-in-out infinite;
}

/* Problem Section Doodles */
.doodle-problem-mag {
  top: 10px;
  right: 1.8%;
  width: 160px;
  animation: floatGentle 7s ease-in-out infinite;
}

.doodle-problem-crayon {
  bottom: 20px;
  left: 1.2%;
  width: 130px;
  transform: rotate(-25deg);
  animation: floatGentleAlt 8s ease-in-out infinite;
}

/* Features Section Doodles */
.doodle-feature-star {
  top: 20px;
  right: 2%;
  width: 120px;
  animation: spinStarSlow 7s ease-in-out infinite;
}

.doodle-feature-puzzle {
  bottom: 20px;
  left: 1.2%;
  width: 130px;
  animation: floatGentle 8s ease-in-out infinite;
}

/* Stages Section Doodles */
.doodle-stages-sun {
  top: 10px;
  left: 1.2%;
  width: 165px;
  animation: pulseSun 6s ease-in-out infinite;
}

.doodle-stages-rocket {
  bottom: 20px;
  right: 1.8%;
  width: 130px;
  animation: floatRocket 7s ease-in-out infinite;
}

/* Customizer Section Doodles */
.doodle-customizer-hammer {
  top: 15px;
  left: 1.5%;
  width: 140px;
  animation: tiltTool 6s ease-in-out infinite;
}

.doodle-customizer-brush {
  top: 10px;
  right: 1.8%;
  width: 140px;
  animation: floatGentle 7s ease-in-out infinite;
}

/* Why-Love Section Doodles */
.doodle-whylove-star {
  top: 25px;
  left: 2%;
  width: 115px;
  animation: spinStarSlow 6s ease-in-out infinite;
}

.doodle-whylove-heart {
  bottom: 20px;
  right: 2%;
  width: 105px;
  animation: floatHeart 4s ease-in-out infinite;
}

/* Dimensions Section Doodles */
.doodle-dim-puzzle {
  top: 20px;
  right: 2%;
  width: 135px;
  animation: floatGentle 7s ease-in-out infinite;
}

.doodle-dim-crayon {
  bottom: 20px;
  left: 1.2%;
  width: 125px;
  transform: rotate(15deg);
  animation: floatGentleAlt 8s ease-in-out infinite;
}

/* Guide Section Doodles */
.doodle-guide-rocket {
  top: 15px;
  left: 1.5%;
  width: 135px;
  animation: floatRocket 7s ease-in-out infinite;
}

.doodle-guide-mag {
  bottom: 15px;
  right: 1.5%;
  width: 145px;
  animation: floatGentle 6s ease-in-out infinite;
}

/* FAQ Section Doodles */
.doodle-faq-sun {
  top: 15px;
  right: 2%;
  width: 160px;
  animation: pulseSun 5s ease-in-out infinite;
}

.doodle-faq-star {
  bottom: 20px;
  left: 1.8%;
  width: 110px;
  animation: spinStarSlow 6s ease-in-out infinite;
}

/* Showroom / Contact Section Doodles */
.doodle-showroom-heart {
  top: 20px;
  left: 2%;
  width: 110px;
  animation: floatHeart 5s ease-in-out infinite;
}

.doodle-showroom-star {
  top: 20px;
  right: 2%;
  width: 115px;
  animation: spinStarSlow 7s ease-in-out infinite;
}

/* Doodle Keyframe Animations */
@keyframes floatRocket {

  0%,
  100% {
    transform: translate(0, 0) rotate(-12deg);
  }

  50% {
    transform: translate(-6px, -12px) rotate(-6deg);
  }
}

@keyframes pulseSun {

  0%,
  100% {
    transform: scale(1) rotate(0deg);
  }

  50% {
    transform: scale(1.08) rotate(5deg);
  }
}

@keyframes spinStarSlow {

  0%,
  100% {
    transform: rotate(0deg) scale(1);
  }

  50% {
    transform: rotate(12deg) scale(1.06);
  }
}

@keyframes floatGentle {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-10px) rotate(3deg);
  }
}

@keyframes floatGentleAlt {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(8px);
  }
}

@keyframes tiltTool {

  0%,
  100% {
    transform: rotate(-10deg);
  }

  50% {
    transform: rotate(-2deg) translateY(-6px);
  }
}

/* Mobile Responsive Doodles */
@media (max-width: 768px) {
  .doodle {
    opacity: 0.75;
  }

  .doodle-hero-rocket {
    width: 70px;
    top: 3%;
    left: 1%;
  }

  .doodle-hero-sun {
    width: 95px;
    top: 1.5%;
    right: 1%;
  }

  .doodle-hero-star {
    width: 48px;
    bottom: 5%;
    left: 2%;
  }

  .doodle-problem-mag,
  .doodle-feature-star,
  .doodle-stages-sun,
  .doodle-customizer-hammer,
  .doodle-customizer-brush,
  .doodle-whylove-star,
  .doodle-dim-puzzle,
  .doodle-guide-rocket,
  .doodle-faq-sun,
  .doodle-showroom-star {
    width: 70px;
  }

  .doodle-problem-crayon,
  .doodle-feature-puzzle,
  .doodle-stages-rocket,
  .doodle-whylove-heart,
  .doodle-dim-crayon,
  .doodle-guide-mag,
  .doodle-faq-star,
  .doodle-showroom-heart {
    width: 65px;
  }

  .header-highlight-left,
  .header-highlight-right {
    width: 26px;
  }
}

/* Hero Key Metric Badges */
.hero-badges-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.hero-badge-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.hero-badge-item .badge-icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.hero-badge-item .badge-text h4 {
  color: #FFFFFF;
  font-size: 1.15rem;
  margin-bottom: 2px;
}

.hero-badge-item .badge-text p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
}

/* ==========================================================================
   SECTION: THE PROBLEM (VẤN ĐỀ VỚI GHẾ TRẺ EM)
   ========================================================================== */
.problem-section {
  background-color: var(--color-bg-warm);
  position: relative;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.problem-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-warm);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.problem-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: #F87171;
}

.problem-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: #F1F5F9;
}

.problem-card-content {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.problem-tag {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  background: #FEE2E2;
  color: #DC2626;
}

.problem-card:nth-child(1) .problem-tag {
  background: #FEE2E2;
  color: #DC2626;
}

.problem-card:nth-child(2) .problem-tag {
  background: #FEF3C7;
  color: #D97706;
}

.problem-card:nth-child(3) .problem-tag {
  background: #FCE7F3;
  color: #DB2777;
}

.problem-card:nth-child(4) .problem-tag {
  background: #EDE9FE;
  color: #7C3AED;
}

.problem-card-title {
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.problem-card-desc {
  font-size: 0.95rem;
  color: var(--text-body);
}

/* Solution Banner */
.solution-banner {
  margin-top: 56px;
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  align-items: center;
  gap: 40px;
  border: 2px solid #FDE68A;
  box-shadow: var(--shadow-md);
}

.solution-img-box {
  text-align: center;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.solution-img-box img {
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: cover;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius-lg);
}

.solution-content h3 {
  font-size: 2rem;
  color: #1E293B;
  margin-bottom: 14px;
}

.solution-content p {
  font-size: 1.05rem;
  color: var(--text-body);
  margin-bottom: 24px;
}

/* ==========================================================================
   SECTION: CORE FEATURES (TÍNH NĂNG CÔNG THÁI HỌC)
   ========================================================================== */
.features-section {
  background: #FFFFFF;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.35s ease;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-yellow);
}

.feature-card-img-wrap {
  background: #FFFDF9;
  padding: 30px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  border-bottom: 1px solid #F1F5F9;
}

.feature-card-img-wrap img {
  max-height: 200px;
  object-fit: contain;
  transition: transform 0.4s ease;
}

.feature-card:hover .feature-card-img-wrap img {
  transform: scale(1.06);
}

.feature-card-body {
  padding: 28px;
}

.feature-step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(250, 186, 25, 0.2);
  color: #B45309;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  margin-bottom: 16px;
  font-family: var(--font-heading);
}

.features-grid .feature-card:nth-child(1) .feature-step-num {
  background: #EBF5FF;
  color: #2563EB;
}

.features-grid .feature-card:nth-child(1):hover {
  border-color: #3B82F6;
  box-shadow: 0 14px 34px rgba(59, 130, 246, 0.2);
}

.features-grid .feature-card:nth-child(2) .feature-step-num {
  background: #F0FDF4;
  color: #16A34A;
}

.features-grid .feature-card:nth-child(2):hover {
  border-color: #22C55E;
  box-shadow: 0 14px 34px rgba(34, 197, 94, 0.2);
}

.features-grid .feature-card:nth-child(3) .feature-step-num {
  background: #FFF7ED;
  color: #EA580C;
}

.features-grid .feature-card:nth-child(3):hover {
  border-color: #F97316;
  box-shadow: 0 14px 34px rgba(249, 115, 22, 0.2);
}

.feature-card-title {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.feature-card-desc {
  font-size: 0.98rem;
  color: var(--text-body);
}

/* 2 Full-width Feature Spotlights */
.feature-spotlight-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 32px;
}

.feature-spotlight-card {
  background: #FAF8F5;
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  align-items: center;
  gap: 28px;
  border: 1px solid var(--border-warm);
}

.feature-spotlight-card img {
  width: 140px;
  flex-shrink: 0;
}

/* ==========================================================================
   SECTION: AGE STAGES (3 MỐC TUỔI PHÁT TRIỂN)
   ========================================================================== */
.stages-section {
  background: #FAF6EF;
}

.stages-tabs-nav {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.stage-tab-btn {
  background: #FFFFFF;
  border: 2px solid var(--border-warm);
  border-radius: var(--radius-full);
  padding: 12px 28px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.stage-tab-btn.active {
  background: var(--primary-gradient);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: 0 6px 18px rgba(255, 123, 0, 0.3);
}

.stage-tab-btn[data-stage="early"].active {
  background: linear-gradient(135deg, #FE5735 0%, #E83E1B 100%);
  box-shadow: 0 8px 24px rgba(254, 87, 53, 0.35);
}

.stage-tab-btn[data-stage="student"].active {
  background: linear-gradient(135deg, #478BC8 0%, #2E72B0 100%);
  box-shadow: 0 8px 24px rgba(71, 139, 200, 0.35);
}

.stage-tab-btn[data-stage="family"].active {
  background: linear-gradient(135deg, #5EAE59 0%, #469641 100%);
  box-shadow: 0 8px 24px rgba(94, 174, 89, 0.35);
}

.stage-tab-content {
  display: none;
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-warm);
}

.stage-tab-content.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stage-content-text {
  padding: 56px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.stage-age-pill {
  display: inline-block;
  padding: 7px 18px;
  background: #FEF3C7;
  color: #D97706;
  font-weight: 800;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  margin-bottom: 16px;
  width: fit-content;
  letter-spacing: 0.4px;
}

#stage-early .stage-age-pill {
  background: #FFEBE6;
  color: #DC2626;
  border: 1px solid #FECACA;
}

#stage-student .stage-age-pill {
  background: #EBF5FF;
  color: #2563EB;
  border: 1px solid #BFDBFE;
}

#stage-family .stage-age-pill {
  background: #F0FDF4;
  color: #16A34A;
  border: 1px solid #BBF7D0;
}

.stage-content-title {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.stage-content-desc {
  font-size: 1.05rem;
  color: var(--text-body);
  margin-bottom: 24px;
}

.stage-checklist {
  list-style: none;
  margin-bottom: 32px;
}

.stage-checklist li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 1rem;
  color: var(--text-dark);
  font-weight: 600;
}

.stage-checklist li svg {
  width: 20px;
  height: 20px;
  color: var(--brand-green);
  flex-shrink: 0;
}

.stage-content-img {
  background: #FFFDF9;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.stage-content-img img {
  max-height: 480px;
  object-fit: contain;
}

/* ==========================================================================
   SECTION: INTERACTIVE COLOR CUSTOMIZER & 3-ANGLE VIEW
   ========================================================================== */
.customizer-section {
  background: #FFFFFF;
}

.customizer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.customizer-preview-container {
  background: #FAF8F5;
  border-radius: var(--radius-xl);
  padding: 48px;
  text-align: center;
  position: relative;
  border: 1px solid var(--border-warm);
}

.customizer-chair-view {
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.customizer-chair-img {
  max-height: 400px;
  max-width: 100%;
  object-fit: contain;
  transition: opacity 0.3s ease, transform 0.3s ease;
  filter: drop-shadow(0 15px 25px rgba(0, 0, 0, 0.12));
}

/* Angle selector tabs on preview */
.angle-selector {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.angle-btn {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.angle-btn.active {
  background: var(--text-dark);
  color: #FFFFFF;
  border-color: var(--text-dark);
}

/* Customizer controls panel */
.customizer-controls {
  padding: 20px 0;
}

.customizer-controls h3 {
  font-size: 2.1rem;
  margin-bottom: 12px;
}

.customizer-controls p.subtitle {
  color: var(--text-body);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.color-picker-box {
  background: #FAF8F5;
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
  border: 1px solid var(--border-warm);
}

.color-picker-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-weight: 700;
  font-size: 1.1rem;
}

.selected-color-name {
  color: var(--primary-orange);
  font-weight: 800;
}

.color-swatches-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 6px 2px;
}

.color-swatches-row::-webkit-scrollbar {
  display: none;
}

.color-swatch-btn {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 3px solid #FFFFFF;
  outline: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, outline-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

.color-swatch-btn:hover {
  transform: scale(1.14);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
}

.color-swatch-btn.active {
  transform: scale(1.18);
  outline-color: var(--text-dark);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.26);
}

@media (max-width: 480px) {
  .color-swatches-row {
    gap: 8px;
  }

  .color-swatch-btn {
    flex: 0 0 34px;
    width: 34px;
    height: 34px;
    border-width: 2px;
  }
}

.swatch-olive {
  background-color: #8E905B;
}

.swatch-orange {
  background-color: #E26A20;
}

.swatch-blue {
  background-color: #2654BF;
}

.swatch-honey {
  background-color: #EEA213;
}

.swatch-black {
  background-color: #262626;
}

.swatch-grey {
  background-color: #637077;
}

.swatch-pink {
  background-color: #C66C70;
}

.swatch-red {
  background-color: #7E0A0D;
}

.customizer-specs-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.spec-chip {
  background: #FFFFFF;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.spec-chip strong {
  display: block;
  color: var(--text-dark);
  font-size: 0.95rem;
}

/* ==========================================================================
   SECTION: WHY PARENTS LOVE ROOKY (VÌ SAO CHA MẸ CHỌN Rooky)
   ========================================================================== */
.why-love-section {
  background-color: #FAF6E6;
  background-image: url("../assets/images/bg-parents-m.webp");
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .why-love-section {
    background-image: url("../assets/images/bg-parents-t-1280w.webp");
  }
}

@media (min-width: 1200px) {
  .why-love-section {
    background-image: url("../assets/images/bg-parents-l-1920w.webp");
  }
}

@media (min-width: 1920px) {
  .why-love-section {
    background-image: url("../assets/images/bg-parents-d-1920w.webp");
  }
}

.why-love-head {
  position: relative;
  z-index: 1;
}

.why-love-heart-doodle {
  position: absolute;
  top: -42px;
  right: calc(50% - 370px);
  width: 95px;
  height: auto;
  pointer-events: none;
  animation: floatHeart 3.5s ease-in-out infinite alternate;
  filter: drop-shadow(0 4px 10px rgba(220, 38, 38, 0.2));
}

@keyframes floatHeart {
  0% {
    transform: translateY(0) rotate(0deg) scale(1);
  }

  100% {
    transform: translateY(-6px) rotate(4deg) scale(1.05);
  }
}

.why-love-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 52px;
  position: relative;
  z-index: 1;
}

.why-love-card {
  position: relative;
  border-radius: 20px;
  padding: 44px 22px 28px 22px;
  text-align: left;
  border: none;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.07);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.why-love-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.14);
}

.why-love-card.card-blue {
  background: #478BC8;
}

.why-love-card.card-green {
  background: #5EAE59;
}

.why-love-card.card-coral {
  background: #FE5735;
}

.why-love-card.card-teal {
  background: #31BDBE;
}

.why-love-icon {
  position: absolute;
  top: -38px;
  left: 20px;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.12));
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.why-love-card:hover .why-love-icon {
  transform: translateY(-4px) scale(1.08);
}

.why-love-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.why-love-title {
  position: relative;
  z-index: 3;
  font-family: var(--font-heading);
  font-size: 1.18rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 8px;
  line-height: 1.35;
  letter-spacing: -0.2px;
}

.why-love-desc {
  position: relative;
  z-index: 3;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.55;
  margin: 0;
  font-weight: 400;
}

/* ==========================================================================
   SECTION: DIMENSIONS & TECHNICAL SPECS (KÍCH THƯỚC & THÔNG SỐ)
   ========================================================================== */
.dimensions-section {
  background: #FFFFFF;
}

.dimensions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.dimension-blueprint-wrap {
  background: #FAF8F5;
  border-radius: var(--radius-xl);
  padding: 32px;
  border: 1px solid var(--border-warm);
  text-align: center;
}

.dimension-blueprint-wrap img {
  width: 100%;
  max-height: 440px;
  object-fit: contain;
  margin: 0 auto;
}

.spec-table-wrap {
  background: #FFFFFF;
}

.spec-table-wrap h3 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.spec-table-wrap p {
  color: var(--text-body);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

.specs-data-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-data-table tr {
  border-bottom: 1px solid var(--border-light);
}

.specs-data-table tr:last-child {
  border-bottom: none;
}

.specs-data-table th,
.specs-data-table td {
  padding: 14px 16px;
  font-size: 0.98rem;
  text-align: left;
}

.specs-data-table th {
  color: var(--text-muted);
  font-weight: 600;
  width: 40%;
}

.specs-data-table td {
  color: var(--text-dark);
  font-weight: 700;
}

/* ==========================================================================
   SECTION: CERTIFICATIONS & SAFETY (CHỨNG NHẬN & AN TÂM)
   ========================================================================== */
.cert-section {
  background: #FAF6EF;
  position: relative;
  overflow: hidden;
}

.cert-carousel-wrapper {
  position: relative;
  width: 100%;
  padding: 0 54px;
  box-sizing: border-box;
}

.cert-carousel-viewport {
  overflow: hidden;
  width: 100%;
  border-radius: var(--radius-xl);
  padding: 10px 4px 20px 4px;
  margin: -10px -4px -20px -4px;
}

.cert-carousel-track {
  display: flex;
  align-items: stretch;
  gap: 24px;
  will-change: transform;
  transition: transform 0.55s cubic-bezier(0.25, 1, 0.5, 1);
}

.cert-carousel-track .cert-card {
  flex: 0 0 calc((100% - 48px) / 3);
  width: calc((100% - 48px) / 3);
  box-sizing: border-box;
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 34px 22px;
  text-align: center;
  border: 1px solid var(--border-warm);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 280px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-carousel-track .cert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.cert-logo-box {
  height: 85px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.cert-logo-box img {
  max-height: 80px;
  max-width: 160px;
  object-fit: contain;
}

.cert-carousel-track .cert-card h4 {
  font-size: 1.18rem;
  margin-bottom: 12px;
  color: var(--text-dark);
  line-height: 1.35;
  font-weight: 700;
}

.cert-carousel-track .cert-card p {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.6;
  margin: 0;
}

/* Floating Arrows at left and right */
.cert-carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 1px solid var(--border-warm);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  color: var(--text-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s ease;
  z-index: 10;
}

.cert-carousel-arrow.prev {
  left: 0;
}

.cert-carousel-arrow.next {
  right: 0;
}

.cert-carousel-arrow:hover {
  background: var(--primary-orange);
  color: #FFFFFF;
  border-color: var(--primary-orange);
  transform: translateY(-50%) scale(1.08);
  box-shadow: 0 6px 18px rgba(227, 113, 0, 0.25);
}

/* Dots */
.cert-carousel-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
}

.cert-carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #D9D2C7;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 0;
}

.cert-carousel-dot.active {
  width: 28px;
  border-radius: 5px;
  background: var(--primary-orange);
}

@media (max-width: 991px) {
  .cert-carousel-wrapper {
    padding: 0 44px;
  }
}

@media (max-width: 767px) {
  .cert-carousel-track {
    gap: 16px;
  }

  .cert-carousel-track .cert-card {
    flex: 0 0 calc((100% - 16px) / 2);
    width: calc((100% - 16px) / 2);
    padding: 28px 16px;
  }
}

@media (max-width: 539px) {
  .cert-carousel-wrapper {
    padding: 0;
  }

  .cert-carousel-arrow {
    display: none;
  }

  .cert-carousel-track .cert-card {
    flex: 0 0 100%;
    width: 100%;
  }
}

/* ==========================================================================
   SECTION: COMPARISON MATRIX (BẢNG SO SÁNH)
   ========================================================================== */
.comparison-section {
  background: #FFFFFF;
}

.comparison-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  background: #FFFFFF;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.comparison-table th,
.comparison-table td {
  padding: 20px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.comparison-table thead th {
  background: #FAF8F5;
  font-size: 1.1rem;
  font-family: var(--font-heading);
}

.comparison-table thead th.Rooky-col-head,
.comparison-table thead th.rooky-col-head,
.comparison-table thead th.Rooky-col-head {
  background: var(--primary-gradient);
  color: #FFFFFF;
  font-size: 1.3rem;
  font-weight: 800;
  text-align: center;
}

.comparison-table tbody td.Rooky-col-data,
.comparison-table tbody td.rooky-col-data,
.comparison-table tbody td.Rooky-col-data {
  background: rgba(250, 186, 25, 0.05);
  font-weight: 700;
  color: #B45309;
  text-align: center;
}

.comparison-table tbody tr:hover {
  background: #FCFBF9;
}

/* ==========================================================================
   SECTION: 3-STEP ADJUSTMENT GUIDE (HƯỚNG DẪN ĐIỀU CHỈNH)
   ========================================================================== */
.guide-section {
  background-color: #FAF6E6;
  background-image: url("../assets/images/bg-guide-m.webp");
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .guide-section {
    background-image: url("../assets/images/bg-guide-t-1280w.webp");
  }
}

@media (min-width: 1200px) {
  .guide-section {
    background-image: url("../assets/images/bg-guide-l-1920w.webp");
  }
}

@media (min-width: 1920px) {
  .guide-section {
    background-image: url("../assets/images/bg-guide-d-1920w.webp");
  }
}

.guide-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr) 1.25fr;
  gap: 22px;
  align-items: stretch;
}

/* Guide Step Cards - Vibrant Kids Palette (Green, Orange, Blue, Amber) */
.guide-step-card {
  border-radius: 24px;
  padding: 32px 24px 28px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.guide-step-card:hover {
  transform: translateY(-8px) scale(1.02);
}

.guide-step-number {
  font-size: 3.4rem;
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.guide-step-card h4 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.35;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  font-family: var(--font-heading);
}

.guide-step-card p {
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0;
}

/* Step 1: Fresh Leaf Green (Merryfair rkGreen) */
.guide-step-card.step-green {
  background: linear-gradient(155deg, #5EAE59 0%, #469641 100%);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 14px 32px rgba(94, 174, 89, 0.32);
}

.guide-step-card.step-green .guide-step-number {
  color: rgba(255, 255, 255, 0.35);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.guide-step-card.step-green h4 {
  color: #FFFFFF;
}

.guide-step-card.step-green p {
  color: rgba(255, 255, 255, 0.95);
}

.guide-step-card.step-green:hover {
  box-shadow: 0 20px 42px rgba(94, 174, 89, 0.42);
}

/* Step 2: Sunny Coral Orange (Merryfair rkOrange) */
.guide-step-card.step-orange {
  background: linear-gradient(155deg, #FE5735 0%, #E83E1B 100%);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 14px 32px rgba(254, 87, 53, 0.32);
}

.guide-step-card.step-orange .guide-step-number {
  color: rgba(255, 255, 255, 0.35);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.guide-step-card.step-orange h4 {
  color: #FFFFFF;
}

.guide-step-card.step-orange p {
  color: rgba(255, 255, 255, 0.95);
}

.guide-step-card.step-orange:hover {
  box-shadow: 0 20px 42px rgba(254, 87, 53, 0.42);
}

/* Step 3: Vibrant Ocean Blue (Merryfair rkBlue) */
.guide-step-card.step-blue {
  background: linear-gradient(155deg, #478BC8 0%, #2E72B0 100%);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 14px 32px rgba(71, 139, 200, 0.32);
}

.guide-step-card.step-blue .guide-step-number {
  color: rgba(255, 255, 255, 0.35);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.guide-step-card.step-blue h4 {
  color: #FFFFFF;
}

.guide-step-card.step-blue p {
  color: rgba(255, 255, 255, 0.95);
}

.guide-step-card.step-blue:hover {
  box-shadow: 0 20px 42px rgba(71, 139, 200, 0.42);
}

/* Step 4: Video Card - Warm Sunny Amber Frame */
.guide-video-card {
  background: linear-gradient(155deg, #FFFDF8 0%, #FFF8EA 100%);
  border: 2px solid #FCD34D;
  border-radius: 24px;
  padding: 22px;
  box-shadow: 0 14px 32px rgba(245, 158, 11, 0.22);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.guide-video-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 42px rgba(245, 158, 11, 0.32);
}

.guide-video-badge {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 7px;
  background: linear-gradient(135deg, #E11D48 0%, #BE123C 100%);
  color: #FFFFFF;
  padding: 7px 15px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 14px rgba(225, 29, 72, 0.35);
  margin-bottom: 14px;
}

.guide-video-badge svg {
  fill: #FFFFFF;
}

.guide-video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  /* 16:9 ratio */
  border-radius: 16px;
  overflow: hidden;
  background: #000000;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.guide-video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.guide-video-caption {
  font-size: 0.95rem;
  font-weight: 800;
  color: #92400E;
  text-align: center;
  margin: 14px 0 0 0;
  letter-spacing: 0.2px;
}

/* ==========================================================================
   SECTION: FAQ (CÂU HỎI THƯỜNG GẶP)
   ========================================================================== */
.faq-section {
  background: #FFFFFF;
  padding-top: 50px;
  padding-bottom: 54px;
}

.faq-section .section-head {
  margin-bottom: 26px;
}

.faq-accordion-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: 12px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  background: #FFFFFF;
}

.faq-item.active {
  border-color: var(--primary-yellow);
  box-shadow: 0 4px 14px rgba(245, 166, 35, 0.12);
}

.faq-question {
  padding: 13px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  gap: 12px;
}

.faq-question h3 {
  font-size: 1.02rem;
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.45;
  margin: 0;
}

.faq-chevron {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #F1F5F9;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease, background-color 0.3s ease;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  background: var(--primary-yellow);
  color: #FFFFFF;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 20px;
}

.faq-item.active .faq-answer {
  max-height: 1600px;
  padding: 0 20px 20px 20px;
}

.faq-answer p {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 8px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* FAQ Feature Infographic Box */
.faq-feature-img-box {
  max-width: 520px;
  margin: 14px auto 6px auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #E2E8F0;
  background: #FFFFFF;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  position: relative;
  text-align: center;
}

.faq-feature-img-link {
  display: block;
  position: relative;
  text-decoration: none;
  cursor: zoom-in;
}

.faq-feature-img-link img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.faq-feature-img-link:hover img {
  transform: scale(1.015);
}

.faq-img-zoom-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(26, 43, 76, 0.85);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  pointer-events: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: background-color 0.2s ease;
}

.faq-feature-img-link:hover .faq-img-zoom-hint {
  background: var(--primary-orange);
}

/* FAQ Steps List */
.faq-steps-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 12px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.faq-steps-list li {
  position: relative;
  padding-left: 24px;
  color: var(--text-body);
  font-size: 0.92rem;
  line-height: 1.55;
}

.faq-steps-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary-orange);
  font-weight: 800;
  font-size: 0.85rem;
}

/* FAQ Video Embed */
.faq-video-wrapper {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 10px auto 4px auto;
  padding-bottom: 56.25%;
  /* 16:9 ratio */
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000000;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.faq-video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ==========================================================================
   SECTION: SHOWROOM & CONTACT / CONSULTATION FORM
   ========================================================================== */
.contact-section {
  background: #FAF6EF;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: flex-start;
}

.contact-info-panel {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 44px;
  border: 1px solid var(--border-warm);
  box-shadow: var(--shadow-sm);
}

.contact-info-panel h3 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.distributor-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FEE2E2;
  color: #B91C1C;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}

/* Showroom Locations 2-card layout */
.showroom-locations-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.showroom-card {
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  transition: all 0.25s ease;
}

.showroom-card:hover {
  background: #FFFDF8;
  border-color: var(--primary-orange);
  box-shadow: 0 4px 12px rgba(255, 123, 0, 0.08);
}

.showroom-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.showroom-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.showroom-pin-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #FEE2E2;
  color: #DC2626;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.showroom-card-header h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0;
}

.showroom-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary-orange);
  background: #FFF7ED;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid rgba(255, 123, 0, 0.2);
  white-space: nowrap;
  flex-shrink: 0;
}

.showroom-nav-btn:hover {
  background: var(--primary-orange);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.showroom-card-address {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.5;
  margin: 0 0 0 32px;
}

/* Map Container */
.showroom-map-container {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
  margin-bottom: 20px;
  background: #E2E8F0;
}

.showroom-map-container iframe {
  display: block;
  width: 100%;
  height: 230px;
  border: 0;
}

/* Quick Contacts (Cùng 1 dòng, Bố cục hài hòa) */
.contact-quick-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 18px;
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-top: 14px;
}

.quick-info-block {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.quick-info-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.quick-info-icon.phone-icon {
  background: #FEE2E2;
  color: #DC2626;
}

.quick-info-icon.clock-icon {
  background: rgba(250, 186, 25, 0.16);
  color: #B45309;
}

.quick-info-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.quick-title {
  display: block;
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 2px;
  white-space: nowrap;
}

.quick-phone-link {
  color: #DC2626;
  font-size: 1.15rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.5px;
  line-height: 1.2;
  white-space: nowrap;
}

.quick-phone-link:hover {
  color: #B91C1C;
  text-decoration: underline;
}

.quick-desc {
  font-size: 0.85rem;
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}

.quick-info-divider {
  width: 1px;
  height: 34px;
  background: #E2E8F0;
  flex-shrink: 0;
}

/* Consultation Form */
.contact-form-panel {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 44px;
  border: 1px solid var(--border-warm);
  box-shadow: var(--shadow-md);
}

.contact-form-panel h3 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.contact-form-panel p.form-desc {
  color: var(--text-body);
  margin-bottom: 28px;
  font-size: 0.98rem;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all 0.25s ease;
  background: #FAF8F5;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-yellow);
  background: #FFFFFF;
  box-shadow: 0 0 0 4px rgba(250, 186, 25, 0.18);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-submit-btn {
  width: 100%;
  margin-top: 10px;
  padding: 16px;
  font-size: 1.1rem;
}

.form-privacy-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 14px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: #0B1120;
  color: #94A3B8;
  padding-top: 68px;
  padding-bottom: 36px;
  font-size: 0.95rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.7fr 0.75fr 1.7fr;
  gap: 32px;
  margin-bottom: 48px;
  align-items: start;
}

.footer-title {
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
  text-transform: uppercase;
  line-height: 1.35;
}

.footer-brand .footer-title {
  font-size: 1.25rem;
}

.footer-desc {
  line-height: 1.7;
  color: #94A3B8;
  margin-bottom: 18px;
  font-size: 0.925rem;
}

.footer-distributor {
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-distributor .distributor-label {
  display: block;
  font-size: 0.825rem;
  color: #94A3B8;
  font-weight: 500;
  margin-bottom: 4px;
}

.footer-distributor .distributor-name {
  display: block;
  font-size: 0.925rem;
  color: #F8FAFC;
  font-weight: 600;
  line-height: 1.45;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.footer-links-list li {
  margin: 0;
}

.footer-links-list a {
  color: #94A3B8;
  text-decoration: none;
  font-size: 0.925rem;
  display: inline-block;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-links-list a:hover {
  color: #FFFFFF;
  transform: translateX(4px);
}

.footer-contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-list .contact-item {
  display: block;
  line-height: 1.6;
  font-size: 0.925rem;
}

.footer-contact-list .contact-label {
  font-weight: 700;
  color: #E2E8F0;
  margin-right: 6px;
}

.footer-contact-list .contact-link {
  text-decoration: none;
  display: inline;
  transition: color 0.2s ease;
}

.footer-contact-list .contact-hotline {
  color: #FF7B00;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.5px;
}

.footer-contact-list .contact-hotline:hover {
  color: #FFA040;
  text-decoration: underline;
}

.footer-contact-list .contact-email {
  color: #38BDF8;
  font-size: 0.925rem;
}

.footer-contact-list .contact-email:hover {
  color: #7DD3FC;
  text-decoration: underline;
}

.footer-contact-list .contact-text {
  color: #CBD5E1;
  font-size: 0.925rem;
  line-height: 1.55;
}

.footer-contact-list .contact-address {
  white-space: nowrap;
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: #64748B;
  flex-wrap: wrap;
  gap: 16px;
  padding-right: 90px;
}

/* ==========================================================================
   FLOATING ACTION BUTTONS (CALL & ZALO/TƯ VẤN)
   ========================================================================== */
.floating-actions {
  position: fixed;
  bottom: 28px;
  right: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 99;
}

.fab-btn {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-float);
  transition: transform 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  text-decoration: none;
  position: relative;
}

.fab-btn:hover {
  transform: scale(1.1);
}

.fab-call {
  background: #DC2626;
  color: #FFFFFF;
  animation: pulseCall 2.5s infinite;
}

.fab-consult {
  background: var(--primary-gradient);
  color: #FFFFFF;
}

.fab-tooltip {
  position: absolute;
  right: 68px;
  background: var(--text-dark);
  color: #FFFFFF;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(10px);
  transition: all 0.2s ease;
  font-family: var(--font-heading);
  font-weight: 700;
}

.fab-btn:hover .fab-tooltip {
  opacity: 1;
  transform: translateX(0);
}

@keyframes pulseCall {
  0% {
    box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.6);
  }

  70% {
    box-shadow: 0 0 0 16px rgba(220, 38, 38, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(220, 38, 38, 0);
  }
}

/* ==========================================================================
   MODAL DIALOG (THÔNG BÁO / ĐĂNG KÝ THÀNH CÔNG)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 100%;
  padding: 40px;
  text-align: center;
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-overlay.active .modal-card {
  transform: translateY(0) scale(1);
}

.modal-icon-success {
  width: 72px;
  height: 72px;
  background: #DCFCE7;
  color: #16A34A;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  margin: 0 auto 20px auto;
}

/* ==========================================================================
   IMAGE LIGHTBOX MODAL (XEM ẢNH TÍNH NĂNG PHÓNG TO)
   ========================================================================== */
.image-lightbox-overlay {
  z-index: 2000;
  background: rgba(15, 23, 42, 0.88);
}

.lightbox-container {
  position: relative;
  max-width: 860px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .lightbox-container {
  transform: translateY(0) scale(1);
}

.lightbox-img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  background: #FFFFFF;
}

.lightbox-close-btn {
  position: absolute;
  top: -18px;
  right: -18px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #FFFFFF;
  color: #1E293B;
  border: none;
  font-size: 26px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
  transition: all 0.2s ease;
  z-index: 10;
}

.lightbox-close-btn:hover {
  background: var(--primary-orange);
  color: #FFFFFF;
  transform: scale(1.1);
}

@media (max-width: 768px) {
  .lightbox-close-btn {
    top: -12px;
    right: 0;
    width: 34px;
    height: 34px;
    font-size: 22px;
  }
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLETS & MOBILE)
   ========================================================================== */
@media (max-width: 1024px) {
  .nav-links {
    gap: 16px;
  }

  .nav-link {
    font-size: 0.92rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-badges-row {
    grid-template-columns: 1fr;
  }

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

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

  .solution-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .stage-tab-content.active {
    grid-template-columns: 1fr;
  }

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

  .why-love-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 52px 24px;
    margin-top: 52px;
  }

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

  .cert-cards-grid {
    grid-template-columns: 1fr;
  }

  .guide-steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    padding: 24px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-light);
  }

  .main-nav.mobile-open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 16px;
  }

  .menu-toggle {
    display: block;
  }

  .logo-group .brand-logo {
    height: 40px;
  }

  .header-actions {
    gap: 8px;
  }

  .lang-dropdown-btn {
    padding: 5px 8px;
    gap: 5px;
  }

  .lang-globe-icon {
    width: 17px;
    height: 17px;
  }

  .lang-current-code {
    font-size: 0.88rem;
  }

  .lang-chevron-icon {
    width: 12px;
    height: 12px;
  }

  .lang-dropdown-menu {
    top: calc(100% + 6px);
    min-width: 160px;
  }

  .hotline-link {
    padding: 6px 10px;
    font-size: 0.84rem;
    gap: 5px;
  }

  .header-action-divider {
    display: none;
  }

  .header-actions .btn {
    display: none;
  }

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

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

  .feature-spotlight-row {
    grid-template-columns: 1fr;
  }

  .why-love-grid {
    grid-template-columns: 1fr;
    gap: 52px;
    margin-top: 50px;
  }

  .why-love-heart-doodle {
    right: 18px;
    top: -4px;
    width: 44px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-info-panel,
  .contact-form-panel {
    padding: 28px 20px;
  }

  .guide-steps-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    padding-right: 0;
    padding-bottom: 72px;
  }

  .hero-title {
    font-size: 2.4rem;
  }

  .hero-subhead {
    font-size: 1.15rem;
  }

  .header-inner {
    gap: 8px;
  }
}

@media (max-width: 540px) {
  .container {
    padding-left: 14px;
    padding-right: 14px;
  }

  .logo-group .brand-logo {
    height: 36px;
  }

  .lang-dropdown-btn {
    padding: 4px 6px;
    gap: 4px;
  }

  .lang-globe-icon {
    width: 16px;
    height: 16px;
  }

  .lang-current-code {
    font-size: 0.82rem;
  }

  .lang-chevron-icon {
    width: 11px;
    height: 11px;
  }

  .hotline-link {
    padding: 0 !important;
    width: 34px !important;
    height: 34px !important;
    border-radius: 50% !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
  }

  .hotline-link span {
    display: none !important;
  }

  .menu-toggle {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px;
  }

  .menu-toggle svg {
    width: 24px;
    height: 24px;
  }

  .contact-quick-info {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
  }

  .quick-info-divider {
    display: none;
  }

  .why-love-heart-doodle {
    display: none;
  }

  .footer-contact-list .contact-address {
    white-space: normal;
  }
}

@media (max-width: 400px) {
  .lang-dropdown-btn {
    padding: 4px 4px;
    gap: 3px;
  }

  .lang-current-code {
    font-size: 0.78rem;
  }
}