/* ============================================
   JLPT Landing Page – Premium Dark Theme
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --clr-bg-primary: #ffffff;
  --clr-bg-secondary: #f4f5f7;
  --clr-bg-card: #ffffff;
  --clr-accent-pink: #bc002d; /* Japan Red */
  --clr-accent-purple: #8b0000; /* Darker Red */
  --clr-accent-indigo: #e60033;
  --clr-accent-sakura: #ffb7c5;
  --clr-accent-gold: #f0c040;
  --clr-text-primary: #1a1a1a;
  --clr-text-secondary: #4a4a4a;
  --clr-text-muted: #6b6b8d;
  --clr-border: rgba(0, 0, 0, 0.08);
  --clr-glass: rgba(255, 255, 255, 0.85);
  --clr-glass-border: rgba(0, 0, 0, 0.08);

  --gradient-hero: linear-gradient(135deg, #ffffff 0%, #fef5f6 40%, #fff0f2 70%, #fdeff2 100%);
  --gradient-accent: linear-gradient(135deg, #bc002d, #8b0000);
  --gradient-btn: linear-gradient(135deg, #bc002d 0%, #e60033 50%, #bc002d 100%);
  --gradient-gold: linear-gradient(135deg, #f0c040, #bc002d);

  --font-heading: 'Be Vietnam Pro', sans-serif;
  --font-body: 'Be Vietnam Pro', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.1);
  --shadow-glow-pink: 0 0 40px rgba(188, 0, 45, 0.2);
  --shadow-glow-purple: 0 0 40px rgba(139, 0, 0, 0.2);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--clr-bg-primary);
  background-image: url('images/sakura_pattern.png');
  background-repeat: repeat;
  background-size: 200px;
  background-attachment: fixed;
  color: var(--clr-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

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

ul,
ol {
  list-style: none;
}

/* ---------- Utility ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--clr-accent-sakura);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 1px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--clr-text-secondary);
  max-width: 640px;
}

.highlight {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.jp-text {
  font-family: var(--font-jp);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }

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

@keyframes float {

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

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

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: 0 0 20px rgba(233, 69, 96, 0.3);
  }

  50% {
    box-shadow: 0 0 40px rgba(233, 69, 96, 0.6), 0 0 80px rgba(233, 69, 96, 0.2);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% center;
  }

  100% {
    background-position: 200% center;
  }
}

@keyframes sakura-fall {
  0% {
    transform: translateY(-10px) rotate(0deg) translateX(0);
    opacity: 1;
  }

  100% {
    transform: translateY(100vh) rotate(720deg) translateX(100px);
    opacity: 0;
  }
}

@keyframes count-up {
  from {
    opacity: 0;
    transform: scale(0.5);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Sakura Particles ---------- */
.sakura-particle {
  position: fixed;
  top: -20px;
  width: 12px;
  height: 12px;
  background: radial-gradient(circle, var(--clr-accent-sakura), transparent);
  border-radius: 50% 0 50% 50%;
  animation: sakura-fall linear forwards;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.5;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
  padding: 10px 0;
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
}

.nav-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: var(--transition-base);
}

.nav-links a:hover {
  color: var(--clr-text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-base);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-pink);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--clr-text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('images/hero-banner.png') center/cover no-repeat;
  opacity: 0.15;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 200px;
  background: linear-gradient(to top, var(--clr-bg-primary), transparent);
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  animation: fadeInLeft 1s ease;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--clr-glass);
  border: 1px solid var(--clr-glass-border);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--clr-accent-sakura);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-badge .badge-dot {
  width: 8px;
  height: 8px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulse-glow 2s infinite;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-title .line-jp {
  display: block;
  font-family: var(--font-jp);
  font-size: 0.5em;
  color: var(--clr-accent-sakura);
  opacity: 0.7;
  margin-bottom: 8px;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--clr-text-secondary);
  margin-bottom: 36px;
  max-width: 520px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
  animation: pulse-cta 2.5s infinite;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transition: 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 10px 30px rgba(233, 69, 96, 0.6);
  filter: brightness(1.1);
}

@keyframes pulse-cta {
  0% {
    transform: scale(1);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
  }

  50% {
    transform: scale(1.03);
    box-shadow: 0 4px 25px rgba(233, 69, 96, 0.6);
  }

  100% {
    transform: scale(1);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
  }
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: transparent;
  border: 1px solid var(--clr-glass-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--clr-glass);
  border-color: var(--clr-accent-purple);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  gap: 40px;
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-visual {
  position: relative;
  animation: fadeInRight 1s ease 0.3s both;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image-wrapper img {
  width: 100%;
  border-radius: var(--radius-lg);
}

.hero-image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--clr-glass-border);
}

.hero-floating-card {
  position: absolute;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--clr-glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  animation: float 4s ease-in-out infinite;
}

.hero-floating-card.card-1 {
  top: 10%;
  right: -30px;
  animation-delay: 0s;
}

.hero-floating-card.card-2 {
  bottom: 15%;
  left: -30px;
  animation-delay: 1.5s;
}

.floating-card-label {
  font-size: 0.7rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.floating-card-value {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-accent-gold);
}

/* ============================================
   PAIN POINTS / PROBLEMS SECTION
   ============================================ */
.problems {
  padding: 120px 0;
  position: relative;
}

.problems::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -200px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.08), transparent);
  border-radius: 50%;
}

.problems-header {
  text-align: center;
  margin-bottom: 64px;
}

.problems-header .section-subtitle {
  margin: 0 auto;
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.problem-card {
  position: relative;
  padding: 36px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--gradient-accent);
  transition: var(--transition-slow);
}

.problem-card:hover {
  border-color: rgba(233, 69, 96, 0.3);
  background: rgba(233, 69, 96, 0.03);
  transform: translateY(-4px);
}

.problem-card:hover::before {
  height: 100%;
}

.problem-icon {
  width: 56px;
  height: 56px;
  background: rgba(233, 69, 96, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.problem-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--clr-text-primary);
}

.problem-card p {
  font-size: 0.95rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
}

/* ============================================
   SOLUTION SECTION
   ============================================ */
.solution {
  padding: 120px 0;
  position: relative;
  background: var(--clr-bg-secondary);
}

.solution::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--clr-accent-purple), transparent);
}

.solution .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.solution-content {
  padding-right: 20px;
}

.solution-content .section-title {
  margin-bottom: 24px;
}

.solution-description {
  font-size: 1.05rem;
  color: var(--clr-text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.solution-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.solution-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.solution-feature:hover {
  border-color: var(--clr-accent-purple);
  background: rgba(139, 92, 246, 0.05);
}

.feature-check {
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: rgba(74, 222, 128, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #4ade80;
  font-size: 1rem;
  margin-top: 2px;
}

.feature-text h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.feature-text p {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
}

.solution-visual {
  position: relative;
}

.solution-visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   LEVELS / CURRICULUM
   ============================================ */
.levels {
  padding: 120px 0;
  position: relative;
}

.levels-header {
  text-align: center;
  margin-bottom: 64px;
}

.levels-header .section-subtitle {
  margin: 0 auto;
}

.levels-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.levels-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--clr-accent-pink), var(--clr-accent-purple), var(--clr-accent-gold));
  transform: translateX(-50%);
}

.level-item {
  display: flex;
  align-items: center;
  margin-bottom: 48px;
  position: relative;
}

.level-item:nth-child(even) {
  flex-direction: row-reverse;
}

.level-marker {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 56px;
  background: var(--clr-bg-primary);
  border: 3px solid;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 800;
  z-index: 2;
  transition: var(--transition-base);
}

.level-item:nth-child(1) .level-marker {
  border-color: #4ade80;
  color: #4ade80;
}

.level-item:nth-child(2) .level-marker {
  border-color: #38bdf8;
  color: #38bdf8;
}

.level-item:nth-child(3) .level-marker {
  border-color: var(--clr-accent-purple);
  color: var(--clr-accent-purple);
}

.level-item:nth-child(4) .level-marker {
  border-color: var(--clr-accent-pink);
  color: var(--clr-accent-pink);
}

.level-item:nth-child(5) .level-marker {
  border-color: var(--clr-accent-gold);
  color: var(--clr-accent-gold);
}

.level-content {
  width: calc(50% - 52px);
  padding: 28px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.level-item:nth-child(odd) .level-content {
  margin-right: auto;
}

.level-item:nth-child(even) .level-content {
  margin-left: auto;
}

.level-content:hover {
  border-color: var(--clr-accent-purple);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-purple);
}

.level-content h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.level-content .level-duration {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--clr-accent-sakura);
  margin-bottom: 12px;
}

.level-content p {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
}

.level-content .level-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.level-topic-tag {
  padding: 4px 12px;
  background: var(--clr-glass);
  border: 1px solid var(--clr-glass-border);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--clr-text-secondary);
}

/* ============================================
   BENEFITS SECTION
   ============================================ */
.benefits {
  padding: 120px 0;
  background: var(--clr-bg-secondary);
  position: relative;
  overflow: hidden;
}

.benefits::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08), transparent);
  border-radius: 50%;
}

.benefits-header {
  text-align: center;
  margin-bottom: 64px;
}

.benefits-header .section-subtitle {
  margin: 0 auto;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.benefit-card {
  position: relative;
  padding: 40px 32px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition-base);
  overflow: hidden;
}

.benefit-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: var(--transition-slow);
}

.benefit-card:hover {
  transform: translateY(-8px);
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: var(--shadow-glow-purple);
}

.benefit-card:hover::after {
  transform: scaleX(1);
}

.benefit-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  background: var(--clr-glass);
  border: 1px solid var(--clr-glass-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  transition: var(--transition-base);
}

.benefit-card:hover .benefit-icon {
  background: rgba(139, 92, 246, 0.15);
  border-color: var(--clr-accent-purple);
  transform: scale(1.1) rotate(5deg);
}

.benefit-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.benefit-card p {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
}

/* ============================================
   TESTIMONIALS
   ============================================ */
.testimonials {
  padding: 120px 0;
  position: relative;
}

.testimonials-header {
  text-align: center;
  margin-bottom: 64px;
}

.testimonials-header .section-subtitle {
  margin: 0 auto;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  padding: 36px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 16px;
  right: 24px;
  font-size: 4rem;
  font-family: Georgia, serif;
  color: rgba(139, 92, 246, 0.15);
  line-height: 1;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--clr-accent-purple);
}

.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: var(--clr-accent-gold);
  font-size: 0.9rem;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--clr-text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.testimonial-info h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
}

.testimonial-info p {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

/* ============================================
   PRICING / CTA SECTION
   ============================================ */
.pricing {
  padding: 120px 0;
  background: var(--clr-bg-secondary);
  position: relative;
  overflow: hidden;
}

.pricing::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(233, 69, 96, 0.06), transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.06), transparent 50%);
}

.pricing-header {
  text-align: center;
  margin-bottom: 64px;
  position: relative;
}

.pricing-header .section-subtitle {
  margin: 0 auto;
}

.pricing-scarcity {
  display: inline-block;
  margin-top: 24px;
  background: rgba(188, 0, 45, 0.08);
  border: 2px solid var(--clr-accent-pink);
  color: var(--clr-accent-pink);
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.05rem;
  box-shadow: 0 4px 15px rgba(188, 0, 45, 0.1);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(233, 69, 96, 0.4);
  }

  70% {
    box-shadow: 0 0 0 10px rgba(233, 69, 96, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(233, 69, 96, 0);
  }
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
  max-width: 1050px;
  margin: 0 auto;
}

.pricing-card {
  padding: 40px 32px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition-base);
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--clr-accent-pink);
  background: linear-gradient(180deg, rgba(233, 69, 96, 0.1) 0%, rgba(10, 10, 26, 0) 100%), var(--clr-bg-card);
  transform: scale(1.08);
  box-shadow: 0 10px 40px rgba(233, 69, 96, 0.15);
}

.pricing-badge {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-btn);
  color: white;
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.5);
  white-space: nowrap;
  z-index: 10;
}

.pricing-card.featured::before {
  content: '🔥 PHỔ BIẾN NHẤT';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 20px;
  background: var(--gradient-accent);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  white-space: nowrap;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow-purple);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-8px);
}

.pricing-tier {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-levels {
  font-size: 0.85rem;
  color: var(--clr-accent-sakura);
  margin-bottom: 24px;
}

.pricing-amount {
  margin-bottom: 8px;
}

.pricing-amount .price {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pricing-amount .currency {
  font-size: 1rem;
  color: var(--clr-text-secondary);
}

.pricing-original {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  text-decoration: line-through;
  margin-bottom: 24px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  border-bottom: 1px solid var(--clr-border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li .check {
  color: #4ade80;
  font-size: 1rem;
}

.pricing-btn {
  display: block;
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-base);
}

.pricing-btn.primary {
  background: var(--gradient-accent);
  color: white;
}

.pricing-btn.secondary {
  background: var(--clr-glass);
  border: 1px solid var(--clr-glass-border);
  color: var(--clr-text-primary);
}

.pricing-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-pink);
}

/* ============================================
   FINAL CTA SECTION
   ============================================ */
.final-cta {
  padding: 120px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(233, 69, 96, 0.1), transparent 60%);
}

.final-cta .container {
  position: relative;
  z-index: 2;
}

.final-cta .section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 20px;
}

.final-cta .section-subtitle {
  margin: 0 auto 40px;
  font-size: 1.15rem;
}

.final-cta .btn-primary {
  font-size: 1.2rem;
  padding: 20px 48px;
  animation: pulse-glow 3s infinite;
}

.urgency-text {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--clr-accent-gold);
}

/* ============================================
   FAQ SECTION
   ============================================ */
.faq {
  padding: 120px 0;
  background: var(--clr-bg-secondary);
}

.faq-header {
  text-align: center;
  margin-bottom: 64px;
}

.faq-header .section-subtitle {
  margin: 0 auto;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition-base);
}

.faq-item:hover {
  border-color: var(--clr-accent-purple);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: var(--clr-bg-card);
  cursor: pointer;
  transition: var(--transition-base);
  user-select: none;
}

.faq-question:hover {
  background: rgba(139, 92, 246, 0.05);
}

.faq-question h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
}

.faq-toggle {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--clr-accent-purple);
  transition: var(--transition-base);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--clr-text-secondary);
  line-height: 1.8;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--clr-border);
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
}

.footer-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--clr-accent-sakura);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* -- Overflow protection for all screen sizes -- */
html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

.hero,
.problems,
.solution,
.levels,
.benefits,
.testimonials,
.pricing,
.final-cta,
.faq,
.footer {
  overflow: hidden;
}

/* ---- TABLET LANDSCAPE / SMALL DESKTOP (max-width: 960px) ---- */
@media (max-width: 960px) {

  /* Navbar: switch to hamburger at 960px since links don't fit */
  .nav-links {
    display: none !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 26, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--clr-border);
  }

  .nav-links.open {
    display: flex !important;
  }

  .nav-mobile-toggle {
    display: block;
  }

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

  .hero-content {
    order: 1;
  }

  .hero-visual {
    order: 0;
    max-width: 500px;
    margin: 0 auto;
  }

  .hero-description {
    margin: 0 auto 36px;
  }

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

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

  .hero-floating-card {
    display: none;
  }

  .solution .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .solution-content {
    padding-right: 0;
  }

  .solution-visual {
    order: -1;
    max-width: 500px;
    margin: 0 auto;
  }
}

/* ---- TABLET PORTRAIT (max-width: 768px) ---- */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  /* Navbar: hide links, show hamburger */
  .nav-links {
    display: none !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 26, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--clr-border);
  }

  .nav-links.open {
    display: flex !important;
  }

  .nav-mobile-toggle {
    display: block;
  }

  .nav-cta {
    padding: 8px 16px;
    font-size: 0.8rem;
  }

  /* Hero */
  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-title {
    font-size: clamp(1.8rem, 6vw, 2.6rem);
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
    padding: 14px 24px;
  }

  /* Problems */
  .problems {
    padding: 80px 0;
  }

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

  .problem-card {
    padding: 28px;
  }

  /* Solution */
  .solution {
    padding: 80px 0;
  }

  /* Levels */
  .levels {
    padding: 80px 0;
  }

  .levels-timeline::before {
    left: 24px;
  }

  .level-item,
  .level-item:nth-child(even) {
    flex-direction: row;
    padding-left: 64px;
  }

  .level-marker {
    left: 24px;
    width: 44px;
    height: 44px;
    font-size: 0.8rem;
  }

  .level-content {
    width: 100%;
  }

  .level-item:nth-child(odd) .level-content,
  .level-item:nth-child(even) .level-content {
    margin: 0;
  }

  /* Benefits / Testimonials / Pricing → 1 column */
  .benefits {
    padding: 80px 0;
  }

  .benefits-grid,
  .testimonials-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  /* Testimonials */
  .testimonials {
    padding: 80px 0;
  }

  /* Pricing */
  .pricing {
    padding: 80px 0;
  }

  /* FAQ */
  .faq {
    padding: 80px 0;
  }

  .faq-question h3 {
    font-size: 0.9rem;
  }

  /* Final CTA */
  .final-cta {
    padding: 80px 0;
  }

  .final-cta .btn-primary {
    width: 100%;
    padding: 18px 32px;
    font-size: 1rem;
  }

  /* Section spacing */
  .section-title {
    font-size: clamp(1.6rem, 5vw, 2.4rem);
  }
}

/* ---- MOBILE (max-width: 480px) ---- */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  /* Navbar compact */
  .nav-logo {
    font-size: 1.1rem;
  }

  .nav-logo .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 1rem;
  }

  .nav-cta {
    padding: 6px 12px;
    font-size: 0.75rem;
  }

  /* Hero */
  .hero {
    padding: 80px 0 40px;
  }

  .hero-title {
    font-size: clamp(1.5rem, 7vw, 2rem);
  }

  .hero-title .line-jp {
    font-size: 0.45em;
  }

  .hero-description {
    font-size: 0.95rem;
  }

  .hero-badge {
    font-size: 0.75rem;
    padding: 6px 14px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  /* Problem cards */
  .problem-card {
    padding: 24px;
  }

  .problem-icon {
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }

  /* Solution features */
  .solution-feature {
    padding: 16px;
  }

  /* Levels */
  .levels-timeline::before {
    left: 20px;
  }

  .level-item,
  .level-item:nth-child(even) {
    padding-left: 56px;
  }

  .level-marker {
    left: 20px;
    width: 36px;
    height: 36px;
    font-size: 0.7rem;
  }

  .level-content {
    padding: 20px;
  }

  .level-content h3 {
    font-size: 1rem;
  }

  .level-topic-tag {
    font-size: 0.7rem;
  }

  /* Benefits */
  .benefit-card {
    padding: 28px 20px;
  }

  .benefit-icon {
    width: 56px;
    height: 56px;
    font-size: 1.5rem;
  }

  /* Testimonials */
  .testimonial-card {
    padding: 24px;
  }

  /* Pricing */
  .pricing-card {
    padding: 32px 20px;
  }

  .pricing-amount .price {
    font-size: 2.4rem;
  }

  /* FAQ */
  .faq-question {
    padding: 16px;
  }

  .faq-question h3 {
    font-size: 0.85rem;
  }

  .faq-answer p {
    padding: 0 16px 16px;
    font-size: 0.85rem;
  }

  /* Footer */
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

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

  /* Final CTA */
  .final-cta .section-title {
    font-size: clamp(1.3rem, 5vw, 1.8rem);
  }

  .urgency-text {
    font-size: 0.8rem;
    flex-direction: column;
    gap: 4px;
  }
}

/* ============================================
   FLOATING ZALO BUTTON
   ============================================ */
.zalo-floating-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  align-items: center;
  background-color: #0068FF;
  color: #ffffff;
  border-radius: 50px;
  padding: 8px 16px 8px 8px;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(0, 104, 255, 0.4);
  z-index: 9999;
  transition: all 0.3s ease;
  gap: 12px;
}

.zalo-floating-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 104, 255, 0.6);
  color: #ffffff;
}

.zalo-icon-wrapper {
  background-color: #ffffff;
  color: #0068FF;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.zalo-icon-wrapper svg {
  width: 20px;
  height: 20px;
}

.zalo-text {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .zalo-floating-btn {
    bottom: 20px;
    right: 20px;
    padding: 6px 12px 6px 6px;
    gap: 8px;
  }
  
  .zalo-icon-wrapper {
    width: 30px;
    height: 30px;
  }
  
  .zalo-icon-wrapper svg {
    width: 16px;
    height: 16px;
  }

  .zalo-text {
    font-size: 0.85rem;
  }
}

/* Zalo Chat Window */
.zalo-chat-window {
  position: fixed;
  bottom: 90px;
  right: 30px;
  width: 350px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 5px 25px rgba(0,0,0,0.15);
  display: flex;
  flex-direction: column;
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  overflow: hidden;
}

.zalo-chat-window.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.zalo-chat-header {
  background: #0068FF;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: white;
}

.zalo-header-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.zalo-avatar {
  position: relative;
  width: 40px;
  height: 40px;
  background: white;
  border-radius: 50%;
  padding: 2px;
}

.zalo-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.zalo-online-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  background: #00E676;
  border-radius: 50%;
  border: 2px solid white;
}

.zalo-name-wrap h4 {
  font-size: 1rem;
  margin: 0;
  font-weight: 600;
}

.zalo-name-wrap p {
  font-size: 0.75rem;
  margin: 0;
  opacity: 0.8;
}

.zalo-close-btn {
  background: none;
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px;
}

.zalo-chat-body {
  padding: 20px 16px;
  background: #F4F5F7;
  height: 250px;
  overflow-y: auto;
}

.zalo-message {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-bottom: 12px;
}

.zalo-message p {
  background: white;
  padding: 12px 16px;
  border-radius: 12px;
  border-top-left-radius: 0;
  font-size: 0.95rem;
  color: #0f172a;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
  margin-bottom: 4px;
  max-width: 90%;
}

.zalo-time {
  font-size: 0.75rem;
  color: #94a3b8;
  margin-left: 4px;
}

.zalo-chat-footer {
  padding: 12px 16px;
  background: white;
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  border-top: 1px solid #e2e8f0;
}

.zalo-input-mock {
  flex: 1;
  background: #F4F5F7;
  padding: 10px 16px;
  border-radius: 20px;
  color: #94a3b8;
  font-size: 0.95rem;
}

.zalo-send-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0068FF;
}

.zalo-send-btn svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .zalo-chat-window {
    right: 20px;
    bottom: 80px;
    width: calc(100vw - 40px);
  }
}