/* 
   CANVA4TEEN Landing Page Stylesheet
   Design Theme: Modern Light Professional (Bespoke)
*/

/* --- 1. Font Definitions (Branding Fonts & Fallbacks) --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,600&family=Inter:wght@300;400;500;600;700&display=swap');

/* Font Gilroy from jsDelivr Mirror (NPM) */
@font-face {
  font-family: 'SVN-Gilroy';
  src: local('SVN-Gilroy SemiBold'), local('SVN-Gilroy-SemiBold'), local('SVN Gilroy SemiBold'),
       local('Gilroy-SemiBold'), local('Gilroy SemiBold'),
       url('https://cdn.jsdelivr.net/npm/@qpokychuk/gilroy@1.0.2/fonts/Gilroy-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'SVN-Gilroy';
  src: local('SVN-Gilroy Medium'), local('SVN-Gilroy-Medium'), local('SVN Gilroy Medium'),
       local('Gilroy-Medium'), local('Gilroy Medium'),
       url('https://cdn.jsdelivr.net/npm/@qpokychuk/gilroy@1.0.2/fonts/Gilroy-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'SVN-Gilroy';
  src: local('SVN-Gilroy Regular'), local('SVN-Gilroy-Regular'), local('SVN Gilroy Regular'),
       local('Gilroy-Regular'), local('Gilroy Regular'),
       url('https://cdn.jsdelivr.net/npm/@qpokychuk/gilroy@1.0.2/fonts/Gilroy-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* Google Sans from Fontsource Variable CDN */
@font-face {
  font-family: 'Google Sans';
  src: local('Google Sans Regular'), local('Google Sans-Regular'), local('GoogleSans-Regular'),
       url('https://cdn.jsdelivr.net/fontsource/fonts/google-sans:vf@latest/files/google-sans-latin-wght-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Google Sans';
  src: local('Google Sans Bold'), local('Google Sans-Bold'), local('GoogleSans-Bold'),
       url('https://cdn.jsdelivr.net/fontsource/fonts/google-sans:vf@latest/files/google-sans-latin-wght-normal.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* --- 2. CSS Custom Properties / Design Tokens --- */
:root {
  /* Color System for Light Mode */
  --bg-primary: #FFFFFF;       /* Pure white page background */
  --bg-secondary: #F8FAFC;     /* Slate-50 for section backgrounds */
  --bg-card: #FFFFFF;          /* Cards are white */
  --bg-card-flat: #EFF6FF;     /* Blue-50 for soft highlight boxes */
  --color-primary: #FFD600;    /* Canva4teen Vibrant Yellow */
  --color-primary-hover: #E2BE00;
  --color-brand-blue: #052F9E;  /* Royal Blue (Primary Brand Color) */
  --color-secondary: #0288D1;  /* Light Blue helper */
  --color-secondary-light: #E0F2FE;
  
  /* Neutral Text Colors */
  --color-text-primary: #0F172A;   /* Slate-900 for headings */
  --color-text-secondary: #475569; /* Slate-600 for body copy */
  --color-text-light: #64748B;
  --color-white: #FFFFFF;
  
  /* Borders & Shadows */
  --color-border: #E2E8F0;         
  --color-border-hover: #CBD5E1;   
  
  /* Signature Card Gradient (Keep for featured elements) */
  --gradient-card: linear-gradient(135deg, #052F9E 0%, #90A5FF 100%);
  
  /* Fonts */
  --font-heading: 'SVN-Gilroy', 'Gilroy', 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Google Sans', 'Inter', sans-serif;
  
  /* Spacing & Borders */
  --border-radius-sm: 12px;
  --border-radius-md: 20px;
  --border-radius-lg: 28px;
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 3. Base Reset & Typography --- */
html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  font-family: var(--font-heading);
  color: var(--color-text-primary);
  line-height: 1.25;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

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

/* --- 4. Layout Utility Classes --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 100px 0;
  position: relative;
}

.bg-alt {
  background-color: var(--bg-secondary);
}

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

.grid {
  display: grid;
}

/* Custom Card Style (Clean Light Style) */
.custom-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 36px;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
  transition: var(--transition-smooth);
}

.custom-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.1);
}

/* Section Header styling */
.section-header {
  margin-bottom: 60px;
  max-width: 750px;
}
.section-header.center {
  margin-left: auto;
  margin-right: auto;
}
.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-brand-blue);
  background: rgba(5, 47, 158, 0.06);
  padding: 6px 18px;
  border-radius: 30px;
  border: 1px solid rgba(5, 47, 158, 0.15);
  margin-bottom: 18px;
}

.section-title {
  font-size: 38px;
  font-weight: 600;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--color-text-primary);
}
.section-subtitle {
  font-size: 18px;
  color: var(--color-text-light);
}

/* --- 5. Buttons & Interactive Elements --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 16.5px;
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-brand-blue);
  box-shadow: 0 4px 12px rgba(255, 214, 0, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-brand-blue);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(5, 47, 158, 0.35);
}

.btn-secondary {
  background-color: rgba(15, 23, 42, 0.03);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: rgba(15, 23, 42, 0.06);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* --- 6. Navigation Header --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  height: 100%;
}

.brand-logos {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-hp {
  height: 110px;
  width: auto;
}

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

.brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-brand-blue);
  letter-spacing: 0.5px;
}

.brand-name span {
  color: var(--color-primary-hover);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 32px;
  margin-left: 48px;
}

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.nav-link:hover {
  color: var(--color-brand-blue);
}

.nav-cta {
  display: flex;
  align-items: center;
}

/* Hamburger mobile menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}
.menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

/* --- 7. Hero Section (Reverted back to premium 2-column Layout) --- */
.hero {
  padding-top: 150px;
  padding-bottom: 100px;
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  background-color: var(--bg-primary); /* Revert back to white background */
}

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

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(5, 47, 158, 0.04);
  border: 1px solid rgba(5, 47, 158, 0.1);
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 24px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-brand-blue);
}

.hero-tag .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #4CAF50;
  box-shadow: 0 0 6px #4CAF50;
  display: inline-block;
  animation: pulse 2s infinite;
}

.hero-title-poster {
  font-family: var(--font-heading);
  font-size: 80px;
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: 12px;
}

.hero-title-poster .blue {
  color: var(--color-brand-blue);
}

.hero-title-poster .yellow {
  color: var(--color-primary);
}

.hero-tagline-poster {
  white-space: nowrap;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-brand-blue);
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  line-height: 1.4;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 0;
  margin-top: auto;
}

.hero-benefits {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
  color: var(--color-text-primary);
  font-weight: 500;
}

.benefit-item svg {
  flex-shrink: 0;
  stroke: var(--color-brand-blue);
}

/* Poster Frame Component */
.poster-frame {
  position: relative;
  border-radius: var(--border-radius-lg);
  background-color: var(--bg-secondary);
  border: 4px solid var(--color-border);
  box-shadow: 0 10px 35px rgba(15, 23, 42, 0.1);
  padding: 8px;
}

.poster-frame img {
  border-radius: var(--border-radius-md);
  width: 100%;
  height: auto;
}

/* --- 8. Pain Points Section (Does this sound familiar?) --- */
.pain-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pain-card {
  position: relative;
  overflow: hidden;
}

.pain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: #653cd6;
}

.pain-icon {
  color: var(--color-brand-blue);
  margin-bottom: 24px;
  width: 72px;
  height: 72px;
  background-color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.05);
  margin-left: 0;
}

.pain-icon svg {
  stroke: var(--color-primary);
  stroke-width: 1.75px;
}

.pain-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-brand-blue);
}

.pain-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- 9. Target Audience Section (Được thiết kế cho) --- */
.audience-wrapper {
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.audience-left {
  position: relative;
}

.audience-title {
  font-size: 38px;
  font-weight: 600;
  margin-bottom: 20px;
}

.audience-subtitle {
  font-size: 18px;
  color: var(--color-brand-blue);
  font-family: var(--font-heading);
  margin-bottom: 24px;
  font-weight: 600;
}

.audience-checklist {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.check-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.check-icon {
  flex-shrink: 0;
  margin-top: 3px;
  stroke: var(--color-brand-blue);
}

.check-text h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-text-primary);
}

.check-text p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* Right layout: Bento callout grid */
.audience-right {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-box {
  padding: 28px;
  border-radius: var(--border-radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-border);
}

.feature-box.highlight {
  border-color: rgba(5, 47, 158, 0.15);
  background-color: rgba(5, 47, 158, 0.01);
}

.feature-box h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--color-brand-blue);
}

.feature-box p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* --- 10. Curriculum Section (Lộ trình 3 Khóa) --- */
.curriculum-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.course-card-gradient {
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--border-radius-md);
  padding: 24px 16px;
  box-shadow: 0 10px 30px rgba(5, 47, 158, 0.15);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.course-card-gradient:hover {
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(5, 47, 158, 0.25);
}

.course-badge-special {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* Custom badges on gradient card */
.course-badge-special.k1 {
  background-color: var(--color-primary);
  color: var(--color-brand-blue);
}

.course-badge-special.k2 {
  background-color: var(--color-white);
  color: var(--color-brand-blue);
}

.course-badge-special.k3 {
  background-color: var(--color-secondary-light);
  color: var(--color-secondary);
}

.course-title-gradient {
  text-transform: uppercase;
  font-size: 26px;
  letter-spacing: 0px;
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.3;
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.course-meta-gradient {
  display: flex;
  justify-content: flex-start;
  width: 100%;
  gap: 120px;
  font-size: 13.5px;
  color: #F1F5F9;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.course-body-gradient {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.course-section-gradient h5 {
  font-size: 12px;
  color: #F8FAFC;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
  font-weight: 600;
}

.course-section-gradient p {
  font-size: 14px;
  color: var(--color-white);
}

.course-section-gradient ul {
  list-style: none;
  font-size: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.course-section-gradient ul li {
  position: relative;
  padding-left: 20px;
  color: var(--color-white);
}

.course-section-gradient ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
}

/* --- 11. Schedule & Timeline Section (Lịch học) --- */
.schedule-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
}

.schedule-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}



.schedule-card:hover {
  border-color: var(--color-border-hover);
}

.schedule-header {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 16px;
}

.schedule-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.schedule-tag {
  font-size: 12px;
  font-family: var(--font-heading);
  background-color: rgba(15, 23, 42, 0.05);
  color: var(--color-text-secondary);
  padding: 4px 10px;
  border-radius: 12px;
}

.schedule-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-label {
  font-size: 12px;
  color: var(--color-text-light);
  text-transform: uppercase;
}

.info-val {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.schedule-note-box {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
}

.note-box {
  padding: 32px;
  border-radius: var(--border-radius-md);
  background-color: var(--bg-card-flat);
  border: 1px dashed rgba(5, 47, 158, 0.2);
}

.note-box h4 {
  font-size: 20px;
  color: var(--color-brand-blue);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.note-box h4 svg {
  stroke: var(--color-brand-blue);
}

.gift-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
}

.note-box p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- 12. Pricing & Countdown Section --- */
.pricing-section {
  position: relative;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

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

.countdown-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.countdown-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.countdown-timer {
  display: flex;
  gap: 16px;
}

.timer-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 90px;
  height: 90px;
  background-color: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);
}

.timer-num {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 600;
  color: var(--color-brand-blue);
  line-height: 1;
}

.timer-label {
  font-size: 11px;
  color: var(--color-text-light);
  text-transform: uppercase;
  margin-top: 4px;
  letter-spacing: 0.5px;
}

/* Biến thể A: Golden Glow Pulse (Nhấp nháy phát sáng hào quang vàng kim cho toàn bộ khung) */
.gift-box {
  display: flex;
  gap: 16px;
  background-color: rgba(255, 214, 0, 0.08);
  border: 1.5px solid rgba(255, 214, 0, 0.4);
  border-radius: var(--border-radius-md);
  padding: 24px;
  animation: giftBoxGlowPulse 2.4s ease-in-out infinite;
}

@keyframes giftBoxGlowPulse {
  0%, 100% {
    border-color: rgba(255, 214, 0, 0.35);
    box-shadow: 0 4px 15px rgba(255, 214, 0, 0.12);
  }
  50% {
    border-color: rgba(255, 214, 0, 0.9);
    box-shadow: 0 0 30px rgba(255, 200, 0, 0.45), 0 8px 25px rgba(255, 214, 0, 0.25);
  }
}

.gift-icon {
  flex-shrink: 0;
  color: var(--color-brand-blue);
}

.gift-icon svg {
  stroke: var(--color-brand-blue);
}

.gift-content h4 {
  font-size: 16px;
  color: var(--color-brand-blue);
  margin-bottom: 4px;
  font-weight: 600;
}

.gift-content p {
  font-size: 14.5px;
  color: var(--color-text-secondary);
}

/* Pricing Card Table & Interactive Effects */
.pricing-card-gradient {
  position: relative;
  background: linear-gradient(135deg, #052f9e 0%, #653cd6 100%) !important;
  color: white !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: var(--border-radius-lg);
  padding: 36px 24px;
  box-shadow: 0 10px 30px rgba(5, 47, 158, 0.15) !important;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s ease, border-color 0.35s ease !important;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.pricing-card-gradient:hover {
  transform: translateY(-10px) !important;
  border-color: rgba(255, 214, 0, 0.6) !important;
  box-shadow: 0 24px 50px rgba(5, 47, 158, 0.45), 0 0 20px rgba(255, 214, 0, 0.3) !important;
}

.pricing-card-gradient .btn {
  transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

.pricing-card-gradient .btn:hover {
  background-color: var(--color-brand-blue) !important;
  color: white !important;
  border-color: var(--color-brand-blue) !important;
  transform: scale(1.03);
  box-shadow: 0 8px 24px rgba(5, 47, 158, 0.4);
}

/* Staggered feature item reveal animation */
.pricing-features .price-feature-item {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.pricing-card-gradient.active .pricing-features .price-feature-item:nth-child(1) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.15s;
}

.pricing-card-gradient.active .pricing-features .price-feature-item:nth-child(2) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.3s;
}

.pricing-card-gradient.active .pricing-features .price-feature-item:nth-child(3) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.45s;
}

.pricing-badge {
  position: absolute;
  top: -16px;
  right: 40px;
  background: var(--color-primary);
  color: var(--color-brand-blue);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 20px;
  letter-spacing: 1px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.pricing-card-header {
  margin-bottom: 30px;
}

.pricing-name {
  font-size: 25px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.pricing-tagline {
  font-size: 14.5px;
  color: #F1F5F9;
}

.price-box {
  margin-bottom: 30px;
}

.price-type {
  font-size: 12px;
  color: #F8FAFC;
  text-transform: uppercase;
  margin-bottom: 4px;
  font-weight: 600;
}

.price-flex {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 44px;
  font-weight: 600;
  color: var(--color-white);
  line-height: 1;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.price-original {
  font-size: 18px;
  color: #E2E8F0;
  text-decoration: line-through;
  opacity: 0.85;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 40px;
}

.price-feature-item {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 15px;
  color: var(--color-white);
}

.price-feature-item svg {
  stroke: var(--color-primary);
}

/* Compare Table */
.combo-compare-box {
  margin-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 24px;
}

.compare-row {
  display: flex;
  justify-content: flex-start;
  padding: 8px 0;
  font-size: 14.5px;
  color: var(--color-white);
}

.compare-row.header {
  font-family: var(--font-heading);
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 8px;
  color: var(--color-white);
}

.compare-row span.early {
  color: var(--color-primary);
  font-weight: 600;
}

/* --- 13. Instructor Section (Giảng viên) --- */
.instructor-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.instructor-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.instructor-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--bg-secondary);
  box-shadow: 0 0 0 2px rgba(5, 47, 158, 0.15);
  margin-bottom: 24px;
  background-color: var(--bg-secondary);
  position: relative;
}

.instructor-avatar svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.instructor-name {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text-primary);
}

.instructor-title {
  font-size: 14px;
  color: var(--color-brand-blue);
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: 16px;
}

.instructor-bio {
  font-size: 14.5px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- 14. Form & Payment Section (Đăng ký) --- */
.register-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: flex-start;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.form-control {
  width: 100%;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 14px;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  transition: var(--transition-smooth);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-brand-blue);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 1px var(--color-brand-blue);
}

select.form-control option {
  background-color: #FFFFFF;
  color: var(--color-text-primary);
}

/* Payment Info Box */
.payment-card {
  padding: 40px;
  border-radius: var(--border-radius-lg);
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-border);
}

.payment-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-primary);
}

.payment-title svg {
  stroke: var(--color-brand-blue);
}

.payment-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.payment-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.payment-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.payment-label {
  font-size: 12px;
  color: var(--color-text-light);
  text-transform: uppercase;
}

.payment-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.payment-value.highlight {
  color: var(--color-brand-blue);
  font-family: var(--font-heading);
}

.payment-instructions {
  background-color: rgba(5, 47, 158, 0.03);
  border-left: 3px solid var(--color-brand-blue);
  padding: 16px;
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* --- 15. Popup Alert Component --- */
.popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.7); 
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

.popup-content {
  background-color: #FFFFFF;
  border: 1px solid var(--color-brand-blue);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  max-width: 500px;
  width: 90%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.2);
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.popup-overlay.active .popup-content {
  transform: scale(1);
}

.popup-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(5, 47, 158, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--color-brand-blue);
}

.popup-icon svg {
  stroke: var(--color-brand-blue);
}

.popup-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

.popup-msg {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 30px;
  line-height: 1.6;
}

.popup-info-box {
  text-align: left;
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-border);
  padding: 20px;
  border-radius: var(--border-radius-sm);
  margin-bottom: 24px;
  font-size: 14.5px;
  color: var(--color-text-secondary);
}

.popup-info-box p {
  color: var(--color-text-secondary);
}

.popup-info-box span.val {
  color: var(--color-text-primary);
  font-weight: 600;
}

/* --- 16. Footer --- */
footer {
  background-color: #021238; 
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
  font-size: 14px;
  color: #94A3B8;
}

.footer-content {
  display: flex;
  justify-content: flex-start;
  align-items: center;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-white);
}

.footer-logo span {
  color: var(--color-primary);
}

/* --- 17. Animations --- */
@keyframes pulse {
  0% {
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 8px rgba(76, 175, 80, 0);
  }
  100% {
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
  }
}

/* Scroll reveal classes */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.mobile-only {
  display: none;
}

/* --- 18. Responsive Media Queries --- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  .hero-title {
    font-size: 42px;
  }
  .hero-desc {
  max-width: 560px;
  text-align: left;
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-benefits {
    align-items: center;
  }
  .poster-frame {
    max-width: 500px;
    margin: 0 auto;
  }
  .pain-grid, .curriculum-grid, .instructor-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .audience-wrapper, .schedule-container, .pricing-grid, .register-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .audience-right {
    margin-top: 20px;
  }
  .audience-image-container {
    min-height: 280px;
  }
  .schedule-note-box {
    margin-top: 20px;
  }
}

@media (max-width: 768px) {
  header {
    height: 70px;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  }
  .nav-menu.active {
    display: flex;
  }
  .menu-toggle {
    display: flex;
  }
  .nav-cta {
    display: none;
  }
  
  .section-padding {
    padding: 70px 0;
  }
  .section-title, .audience-title {
    font-size: 28px;
  }
  .hero {
    padding-top: 120px;
  }
  .hero-title-poster {
    font-size: 44px;
    text-wrap: balance;
  }
  .hero-tagline-poster {
    font-size: 16px;
    white-space: normal;
    letter-spacing: 0;
    line-height: 1.4;
    text-wrap: balance;
  }
  .desktop-only {
    display: none !important;
  }
  .mobile-only {
    display: block !important;
  }
  .hero-tag {
    display: inline-block;
    text-align: center;
    line-height: 1.5;
    text-wrap: balance;
  }
  .hero-tag .dot {
    width: 10px;
    height: 10px;
    margin-right: 6px;
    vertical-align: middle;
    position: relative;
    top: -1px;
  }
  .hero-desc {
    text-align: center;
    padding: 0 10px;
    text-wrap: balance;
    line-height: 1.6;
  }
  .hero-actions {
    margin-top: 38px;
    flex-direction: row;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 12px;
  }
  .hero-actions .btn {
    padding: 12px 16px;
    font-size: 14px;
    width: auto;
    white-space: nowrap;
  }
  .pain-grid, .curriculum-grid, .instructor-grid, .schedule-container {
    grid-template-columns: 1fr;
  }
  .schedule-note-box {
    justify-content: flex-start;
    gap: 20px;
    height: auto;
  }
  .countdown-timer {
    justify-content: center;
  }
  .audience-checklist {
    padding: 24px 20px !important;
  }
  .footer-content {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  .footer-grid-new {
    display: flex !important;
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }
  .footer-grid-new > div:nth-child(2) {
    order: 1;
    justify-content: center !important;
  }
  .footer-grid-new > div:nth-child(4) {
    order: 2;
    justify-content: center !important;
    text-align: center !important;
  }
  .footer-grid-new > div:nth-child(1) {
    order: 3;
    justify-content: center !important;
    margin-top: 16px;
    margin-bottom: -16px;
  }
  .footer-grid-new > div:nth-child(3) {
    order: 4;
    justify-content: center !important;
    text-align: center !important;
  }
  .gallery-wrapper {
    overflow: hidden;
    -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
    mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
    padding: 10px 0;
  }
  .gallery-grid {
    display: flex !important;
    grid-template-columns: none !important;
    flex-wrap: nowrap;
    width: max-content;
    animation: gallery-scroll 12s ease-in-out infinite alternate;
  }
  .gallery-grid img {
    width: 260px !important;
    height: 180px !important;
    flex-shrink: 0;
  }
  .pricing-card-gradient {
    padding: 24px;
  }
  .pricing-badge {
    right: 20px;
  }
  .course-title-gradient {
    font-size: 20px;
  }
  .pricing-name {
    font-size: 22px;
    white-space: normal;
  }
  .gift-title {
    font-size: 18px !important;
    white-space: nowrap;
  }
  .footer-tagline-1 {
    font-size: 13.5px !important;
    white-space: nowrap;
    line-height: 1.4;
  }
  .footer-tagline-2 {
    font-size: 13px !important;
    line-height: 1.5;
    text-align: center;
  }
}

@keyframes gallery-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-100% + 100vw - 40px)); }
}
.hero-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: flex-start;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--color-brand-blue);
  transition: width 0.3s ease;
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

#about .section-subtitle {
  max-width: 1000px; /* Increase width to allow 1 line */
  white-space: nowrap; /* Force 1 line */
}

/* On mobile, allow wrapping to prevent horizontal scroll */
@media (max-width: 768px) {
  #about .section-subtitle {
    white-space: normal;
  }
}

.course-card-gradient {
    background: linear-gradient(135deg, var(--color-brand-blue) 0%, #031b5c 100%);
    color: white;
    border-radius: 20px;
    padding: 24px 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}
.course-card-gradient .course-title-gradient {
  text-transform: uppercase;
    color: white;
}
.course-card-gradient .course-meta-gradient {
    color: rgba(255,255,255,0.9);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.course-card-gradient .course-section-gradient h5 {
    color: var(--color-primary);
}
.course-card-gradient .course-section-gradient p,
.course-card-gradient .course-section-gradient ul,
.course-card-gradient .course-section-gradient li {
    color: rgba(255,255,255,0.9);
}

/* Fix alignment across cards */
.course-card-gradient {
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Hover effect */
.course-card-gradient:hover {
    transform: translateY(-12px) scale(1.05);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    z-index: 10;
}

.curriculum-grid:hover .course-card-gradient:not(:hover) {
    transform: scale(0.95);
    opacity: 0.7;
}

.course-card-gradient .course-title-gradient {
  text-transform: uppercase;
    display: flex;
    align-items: center;
}

.course-card-gradient .course-meta-gradient {
    align-items: flex-start;
}

.course-body-gradient {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Align sections */





/* Redesign Schedule Section */
#schedule {
    background: linear-gradient(135deg, rgba(5, 47, 158, 0.07) 0%, rgba(5, 47, 158, 0.01) 100%);
    border-top: 1px solid rgba(5, 47, 158, 0.05);
    border-bottom: 1px solid rgba(5, 47, 158, 0.05);
}

.schedule-card {
  padding: 26px;
  border-radius: 16px;
  background-color: #ffffff;
  border: 1px solid rgba(5, 47, 158, 0.08);
  box-shadow: 0 10px 24px rgba(5, 47, 158, 0.04);
  transition: all 0.3s ease;
}
.schedule-card:hover {
  transform: translateY(-4px);
  border-color: rgba(5, 47, 158, 0.2);
  box-shadow: 0 16px 32px rgba(5, 47, 158, 0.08);
}


/* Force equal height and width for instructor cards */
@media (min-width: 769px) {
  .instructor-grid {
      display: grid !important;
      grid-template-columns: repeat(3, 1fr) !important;
      align-items: stretch !important;
  }
}
.instructor-card {
    display: flex !important;
    flex-direction: column !important;
    height: 100% !important;
    min-height: 100% !important;
    box-sizing: border-box !important;
}
.instructor-bio {
    flex: 1; /* Allows the bio to fill the remaining space */
}

/* --- 19. Feedback Marquee Section --- */
.marquee-wrapper {
  overflow: hidden;
  width: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 40px 0;
  gap: 24px;
  -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
  mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.marquee-track {
  display: flex;
  width: max-content;
}

.marquee-content {
  display: flex;
  gap: 20px;
  padding-right: 20px;
}

.marquee-content.left {
  animation: marquee-left 35s linear infinite;
}

.marquee-content.right {
  animation: marquee-right 35s linear infinite;
}

.marquee-track:hover .marquee-content {
  animation-play-state: paused;
}

.m-bento-group {
  display: flex;
  gap: 20px;
}

.m-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.m-item {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(5, 47, 158, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  background-color: #fff;
  border: 1px solid rgba(5, 47, 158, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
}

.m-item:hover {
  transform: scale(1.02);
  box-shadow: 0 15px 40px rgba(5, 47, 158, 0.4), 0 0 20px var(--color-brand-blue);
  z-index: 10;
}

.m-item img {
  height: 100%;
  width: auto;
  object-fit: contain;
  display: block;
}

/* Kích thước to nhỏ khác nhau */
.m-item.large {
  height: 380px;
  width: auto;
}

.m-item.small {
  height: 180px;
  width: auto;
}

@keyframes marquee-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-100%); }
}

@keyframes marquee-right {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(0); }
}

@media (max-width: 768px) {
  .m-item.large {
    height: 260px;
    width: auto;
  }
  .m-item.small {
    height: 120px;
    width: auto;
  }
}

/* --- Hero Section Animations (Custom Combination) --- */
@keyframes fadeUpStagger {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatHero {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
  100% {
    transform: translateY(0px);
  }
}

/* Staggered text fade up */
.hero-tag {
  opacity: 0;
  animation: fadeUpStagger 0.8s ease-out 0.1s forwards;
}
.hero-title-poster {
  opacity: 0;
  animation: fadeUpStagger 0.8s ease-out 0.3s forwards;
}
.hero-tagline-poster {
  opacity: 0;
  animation: fadeUpStagger 0.8s ease-out 0.5s forwards;
}
.hero-desc {
  opacity: 0;
  animation: fadeUpStagger 0.8s ease-out 0.7s forwards;
}
.hero-actions {
  opacity: 0;
  animation: fadeUpStagger 0.8s ease-out 0.9s forwards;
}
.hero-benefits {
  opacity: 0;
  animation: fadeUpStagger 0.8s ease-out 1.1s forwards;
}

/* Floating hero image */
.poster-frame {
  animation: floatHero 6s ease-in-out infinite;
}