/* ==========================================================================
   CSS DESIGN SYSTEM - HỘI GIÁO DỤC VÀ ĐÀO TẠO TP.HCM (AET)
   Design style: Premium Glassmorphism, Modern Layout, High CRO & Animations
   ========================================================================== */

/* 1. Google Fonts & CSS Variables */
@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,500;0,700;0,900;1,400&display=swap');

:root {
  /* Colors */
  --primary-dark: #07152B;       /* Nền tiêu đề, chân trang (Xanh dương đậm tối) */
  --primary-navy: #0A2540;       /* Xanh dương đậm chủ đạo của AET */
  --primary-blue: #0F2C59;       /* Xanh dương uy tín thương hiệu */
  --primary-light: #1D4ED8;      /* Xanh dương sáng */
  --accent-red: #C59B27;         /* Vàng đồng điểm nhấn, CTA chính (Giữ tên biến để tránh sửa code CSS diện rộng) */
  --accent-orange: #E5C060;      /* Vàng kim kết hợp */
  --accent-glow: rgba(197, 155, 39, 0.4);
  
  /* Gradients */
  --grad-primary: linear-gradient(135deg, #0F2C59 0%, #07152B 100%);
  --grad-accent: linear-gradient(135deg, #C59B27 0%, #E5C060 100%);
  --grad-blue: linear-gradient(135deg, #1D4ED8 0%, #0F2C59 100%);
  --grad-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.4) 100%);
  --grad-dark-glass: linear-gradient(135deg, rgba(15, 23, 42, 0.05) 0%, rgba(15, 23, 42, 0.01) 100%);

  /* Neutrals */
  --bg-pure: #FFFFFF;
  --bg-soft: #F8FAFC;
  --bg-card: #F1F5F9;
  --text-dark: #1E293B;
  --text-muted: #64748B;
  --text-light: #F8FAFC;
  --border-light: rgba(226, 232, 240, 0.8);
  --border-glass: rgba(255, 255, 255, 0.6);

  /* Shadow & Radii */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.02);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 40px -15px rgba(15, 23, 42, 0.15);
  --shadow-glow: 0 0 20px 5px rgba(197, 155, 39, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 32px;
  --radius-full: 9999px;

  /* Font Families */
  --font-title: 'Roboto', sans-serif;
  --font-body: 'Roboto', sans-serif;
}

/* 2. Reset & Global Styles */
*, *::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(--bg-pure);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary-navy);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-soft);
}
::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* 3. Utility Classes & Layouts */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.text-center { text-align: center; }
.text-accent { color: var(--accent-red); }
.text-primary { color: var(--primary-light); }

.badge-tag {
  display: inline-block;
  padding: 6px 16px;
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  font-family: var(--font-title);
}

.section-title-wrapper {
  max-width: 700px;
  margin: 0 auto 60px auto;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--grad-accent);
  border-radius: var(--radius-full);
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Glassmorphism Card Style */
.glass-card {
  background: var(--grad-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(239, 68, 68, 0.2);
}

/* 4. Navigation Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  transition: all 0.4s ease;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  border-color: var(--border-light);
  padding: 10px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  transition: all 0.4s ease;
}

.site-header.scrolled .nav-container {
  padding: 10px 0;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  fill: var(--primary-blue);
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--primary-navy);
}

.logo-sub {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--accent-red);
  text-transform: uppercase;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-hotline {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--primary-blue);
}

.hotline-icon {
  background: rgba(30, 58, 186, 0.1);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--primary-light);
  animation: pulse 2s infinite;
}

/* 5. Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-primary {
  background: var(--grad-accent);
  color: var(--bg-pure);
  box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--primary-blue);
  color: var(--bg-pure);
  box-shadow: 0 4px 15px rgba(30, 58, 186, 0.2);
}

.btn-secondary:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(30, 58, 186, 0.3);
}

.btn-nav {
  padding: 10px 20px;
  font-size: 0.85rem;
}

/* 6. Section 1: Hero Banner */
.hero-section {
  position: relative;
  background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.08) 0%, transparent 60%),
              radial-gradient(circle at 10% 80%, rgba(239, 68, 68, 0.05) 0%, transparent 50%),
              var(--bg-soft);
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  letter-spacing: 2px;
  font-size: 0.85rem;
}

.hero-title {
  font-size: clamp(1.8rem, 3.8vw, 2.8rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--primary-navy);
  margin-bottom: 24px;
}

.hero-title span {
  display: block; /* Đẩy tên trường xuống dòng riêng biệt một cách chuyên nghiệp */
  background: var(--grad-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  padding: 4px 0;
}

.logo-icon-img {
  width: auto;
  height: 52px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.06));
}

.footer-logo-img {
  width: auto;
  height: 44px;
  object-fit: contain;
}

.hero-desc {
  font-size: 1.25rem;
  color: #334155;
  margin-bottom: 36px;
  border-left: 4px solid var(--accent-red);
  padding-left: 18px;
}

.hero-desc strong {
  color: var(--accent-red);
  font-weight: 800;
}

.hero-benefits {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 40px;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
}

.benefit-icon {
  color: #10B981;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hero-cta-wrapper {
  display: flex;
  align-items: center;
  gap: 20px;
}

.hero-cta-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
}

.hero-cta-hint strong {
  color: var(--accent-red);
}

.hero-visual {
  position: relative;
  width: 100%;
}

.visual-backdrop {
  position: absolute;
  top: 10%;
  right: -10%;
  width: 100%;
  height: 100%;
  background: var(--grad-blue);
  border-radius: 40% 60% 60% 40% / 50% 30% 70% 50%;
  filter: blur(80px);
  opacity: 0.15;
  z-index: 1;
  animation: morphBackground 12s ease-in-out infinite alternate;
}

.visual-image-wrapper {
  position: relative;
  z-index: 2;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--bg-pure);
  transform: rotate(1.5deg);
  transition: all 0.5s ease;
}

.visual-image-wrapper:hover {
  transform: rotate(0deg) scale(1.015);
}

.hero-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}

/* Floating Light Particles */
.light-particle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--grad-accent);
  border-radius: var(--radius-full);
  filter: blur(1px);
  box-shadow: 0 0 10px 4px rgba(239, 68, 68, 0.4);
  z-index: 3;
  pointer-events: none;
}

.light-particle.p1 {
  top: 10%;
  left: 20%;
  animation: floatParticle1 6s ease-in-out infinite alternate;
}

.light-particle.p2 {
  bottom: 15%;
  right: 10%;
  animation: floatParticle2 8s ease-in-out infinite alternate;
}

.light-particle.p3 {
  top: 60%;
  left: -5%;
  width: 8px;
  height: 8px;
  background: var(--primary-light);
  box-shadow: 0 0 8px 3px rgba(37, 99, 235, 0.4);
  animation: floatParticle3 7s ease-in-out infinite alternate;
}

@keyframes floatParticle1 {
  0% { transform: translateY(0) translateX(0) scale(1); opacity: 0.6; }
  100% { transform: translateY(-30px) translateX(15px) scale(1.3); opacity: 0.9; }
}

@keyframes floatParticle2 {
  0% { transform: translateY(0) translateX(0) scale(1.2); opacity: 0.5; }
  100% { transform: translateY(25px) translateX(-20px) scale(0.8); opacity: 0.8; }
}

@keyframes floatParticle3 {
  0% { transform: translateY(0) translateX(0) scale(0.9); opacity: 0.7; }
  100% { transform: translateY(-20px) translateX(-15px) scale(1.4); opacity: 0.9; }
}

.hero-stats-badge {
  position: absolute;
  bottom: 30px;
  left: -40px;
  z-index: 3;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-glass);
}

.stats-circle {
  width: 48px;
  height: 48px;
  background: var(--grad-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-pure);
  font-weight: 800;
  box-shadow: 0 4px 10px rgba(239, 68, 68, 0.2);
}

.stats-text {
  display: flex;
  flex-direction: column;
}

.stats-num {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary-navy);
}

.stats-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* 7. Section 2: 4 Nhóm Quyền Lợi Cốt Lõi Dành Cho Hội Viên */
.reasons-section {
  background-color: var(--bg-pure);
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.reason-card {
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  height: 100%;
}

.reason-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--bg-pure);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid rgba(226, 232, 240, 0.8);
  transition: all 0.3s ease;
}

.reason-card:hover .reason-icon-wrapper {
  background: var(--grad-accent);
  color: var(--bg-pure);
  transform: scale(1.1) rotate(5deg);
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

.reason-icon {
  width: 32px;
  height: 32px;
  fill: var(--primary-blue);
  transition: all 0.3s ease;
}

.reason-card:hover .reason-icon {
  fill: var(--bg-pure);
}

.reason-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  font-weight: 700;
  color: var(--primary-navy);
}

.reason-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 8. Section 3: Các Ngành Nghề Đào Tạo */
.majors-section {
  background-color: var(--bg-soft);
  position: relative;
}

.tabs-wrapper {
  max-width: 900px;
  margin: 0 auto 40px auto;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px;
  background: rgba(226, 232, 240, 0.4);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
}

.tab-btn {
  flex: 1;
  padding: 14px 20px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
  white-space: nowrap;
}

/* Các trạng thái Active của Tab Button theo màu LMS */
.tab-btn[data-tab="tab-health"].active {
  background: #10B981 !important;
  color: var(--bg-pure) !important;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}
.tab-btn[data-tab="tab-health"]:hover:not(.active) {
  color: #10B981;
  background: rgba(16, 185, 129, 0.1);
}

.tab-btn[data-tab="tab-tourism"].active {
  background: #F97316 !important;
  color: var(--bg-pure) !important;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.4);
}
.tab-btn[data-tab="tab-tourism"]:hover:not(.active) {
  color: #F97316;
  background: rgba(249, 115, 22, 0.1);
}

.tab-btn[data-tab="tab-tech"].active {
  background: #3B82F6 !important;
  color: var(--bg-pure) !important;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}
.tab-btn[data-tab="tab-tech"]:hover:not(.active) {
  color: #3B82F6;
  background: rgba(59, 130, 246, 0.1);
}

.tab-btn[data-tab="tab-languages"].active {
  background: #8B5CF6 !important;
  color: var(--bg-pure) !important;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
}
.tab-btn[data-tab="tab-languages"]:hover:not(.active) {
  color: #8B5CF6;
  background: rgba(139, 92, 246, 0.1);
}

.tab-panel {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.tab-panel.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

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

/* Thẻ ngành học Glassmorphism kết hợp màu chỉ thị của LMS */
.major-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 180px;
  border-left: 5px solid transparent;
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.major-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.major-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-light);
  text-transform: uppercase;
  transition: color 0.3s ease;
}

.major-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-navy);
}

.major-action {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-red);
  margin-top: 16px;
  transition: all 0.3s ease;
}

.major-action svg {
  transition: transform 0.3s ease;
}

/* Cấu hình chi tiết hiệu ứng hover cho từng khối ngành */
/* 1. Sức khỏe & Sắc đẹp - Emerald Green */
.major-card.cat-health {
  border-left-color: #10B981;
}
.major-card.cat-health .major-tag {
  color: rgba(16, 185, 129, 0.8);
}
.major-card.cat-health:hover {
  border-color: rgba(16, 185, 129, 0.35);
  border-left-color: #10B981;
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.12), var(--shadow-sm);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(16, 185, 129, 0.03));
  transform: translateY(-5px);
}
.major-card.cat-health .major-action {
  color: #10B981;
}

/* 2. Dịch vụ & Du lịch - Coral Sunset Orange */
.major-card.cat-tourism {
  border-left-color: #F97316;
}
.major-card.cat-tourism .major-tag {
  color: rgba(249, 115, 22, 0.8);
}
.major-card.cat-tourism:hover {
  border-color: rgba(249, 115, 22, 0.35);
  border-left-color: #F97316;
  box-shadow: 0 10px 30px rgba(249, 115, 22, 0.12), var(--shadow-sm);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(249, 115, 22, 0.03));
  transform: translateY(-5px);
}
.major-card.cat-tourism .major-action {
  color: #F97316;
}

/* 3. Kinh tế & Công nghệ - Electric Tech Blue */
.major-card.cat-tech {
  border-left-color: #3B82F6;
}
.major-card.cat-tech .major-tag {
  color: rgba(59, 130, 246, 0.8);
}
.major-card.cat-tech:hover {
  border-color: rgba(59, 130, 246, 0.35);
  border-left-color: #3B82F6;
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.12), var(--shadow-sm);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(59, 130, 246, 0.03));
  transform: translateY(-5px);
}
.major-card.cat-tech .major-action {
  color: #3B82F6;
}

/* 4. Ngôn ngữ học - Royal Violet Purple */
.major-card.cat-languages {
  border-left-color: #8B5CF6;
}
.major-card.cat-languages .major-tag {
  color: rgba(139, 92, 246, 0.8);
}
.major-card.cat-languages:hover {
  border-color: rgba(139, 92, 246, 0.35);
  border-left-color: #8B5CF6;
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.12), var(--shadow-sm);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(139, 92, 246, 0.03));
  transform: translateY(-5px);
}
.major-card.cat-languages .major-action {
  color: #8B5CF6;
}

.major-card:hover .major-action {
  transform: translateX(5px);
}

.major-card:hover .major-action svg {
  transform: translateX(4px);
}

/* 9. Section 4: Học Phí & Chính Sách Ưu Đãi */
.pricing-section {
  background-color: var(--bg-pure);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.price-card {
  padding: 36px 24px;
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.price-card.popular {
  border-color: rgba(239, 68, 68, 0.3);
  background: linear-gradient(to bottom, #FFFFFF, #FFF7ED);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-accent);
  color: var(--bg-pure);
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.price-card-header {
  margin-bottom: 20px;
}

.price-card-type {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.price-amount {
  font-size: clamp(1.2rem, 1.6vw, 1.6rem);
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1.2;
  margin: 10px 0;
}

.price-amount span {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  display: block;
  margin-top: 4px;
}

.price-card-body {
  margin-bottom: 24px;
}

.price-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-dark);
  text-align: left;
  max-width: 290px;
  margin: 0 auto;
}

.price-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

.price-features li svg {
  color: #10B981;
  flex-shrink: 0;
  margin-top: 3px;
}

.price-note-box {
  background: rgba(30, 58, 186, 0.03);
  border: 1px dashed rgba(30, 58, 186, 0.2);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  max-width: 800px;
  margin: 0 auto 60px auto;
}

.price-note-box svg {
  color: var(--primary-light);
  flex-shrink: 0;
}

.price-note-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary-blue);
}

/* Scholarship Tickets */
.scholarship-title-wrapper {
  text-align: center;
  margin-bottom: 40px;
}

.scholarship-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: 10px;
}

.countdown-box {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: var(--primary-navy);
  color: var(--bg-pure);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  margin-bottom: 40px;
  box-shadow: var(--shadow-md);
}

.countdown-label {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.8);
}

.countdown-timer {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-title);
  font-weight: 800;
}

.timer-num {
  color: var(--accent-red);
}

.tickets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.ticket-card {
  background: var(--bg-pure);
  border: 1px solid rgba(226, 232, 240, 0.6);
  border-radius: var(--radius-md);
  position: relative;
  padding: 32px 28px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  /* CSS mask circular notch styling on left/right borders */
  background-image: 
    radial-gradient(circle at 0% 50%, transparent 12px, #fff 13px), 
    radial-gradient(circle at 100% 50%, transparent 12px, #fff 13px);
  background-position: left, right;
  background-size: 51% 100%;
  background-repeat: no-repeat;
  transition: all 0.3s ease;
}

.ticket-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-red);
}

/* Dotted separating line across the ticket notches */
.ticket-card::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 12px;
  right: 12px;
  height: 1px;
  border-top: 2px dashed rgba(203, 213, 225, 0.8);
  transform: translateY(-50%);
  z-index: 1;
}

.ticket-top {
  padding-bottom: 24px;
  min-height: 110px;
}

.ticket-bottom {
  padding-top: 24px;
  min-height: 110px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.ticket-badge {
  position: absolute;
  top: 15px;
  right: 15px;
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.ticket-badge.danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  animation: pulse 1.5s infinite;
}

.ticket-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--accent-red);
  margin-bottom: 6px;
}

.ticket-subtitle {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.ticket-desc {
  font-size: 0.95rem;
  color: var(--text-dark);
  font-weight: 500;
}

.ticket-btn-action {
  align-self: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-blue);
  text-decoration: underline;
  cursor: pointer;
  margin-top: 10px;
}

.ticket-btn-action:hover {
  color: var(--accent-red);
}

/* 10. Section 5: Chương Trình Du Học Nghề & Định Cư */
.study-abroad-section {
  background-color: var(--primary-navy);
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}

.study-abroad-section .section-title {
  color: var(--text-light);
}

.study-abroad-section .section-desc {
  color: #94A3B8;
}

.map-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.6;
  z-index: 1;
}

.abroad-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.abroad-card {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.4s ease;
}

.abroad-card:hover {
  transform: translateY(-8px);
  background: rgba(30, 41, 59, 0.95);
  border-color: var(--accent-red);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.country-flag-box {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px auto;
  border-radius: var(--radius-full);
  border: 3px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-pure);
  transition: all 0.3s ease;
}

.abroad-card:hover .country-flag-box {
  transform: scale(1.1);
  border-color: var(--accent-red);
}

.country-flag-box svg {
  width: 50px;
  height: 50px;
}

.country-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-light);
  margin-bottom: 8px;
}

.abroad-highlight {
  color: var(--accent-orange);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
}

.abroad-details {
  list-style: none;
  font-size: 0.9rem;
  color: #94A3B8;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* 11. Section 6: Form Đăng Ký & Footer */
.signup-section {
  background: radial-gradient(circle at 10% 20%, rgba(30, 58, 186, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 90% 80%, rgba(239, 68, 68, 0.03) 0%, transparent 50%),
              var(--bg-soft);
}

.signup-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 1024px) {
  .signup-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

.zalo-chatbot-card {
  padding: 40px 32px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.zalo-chatbot-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: var(--grad-blue);
}

.zalo-chatbot-header {
  text-align: center;
  margin-bottom: 24px;
}

.zalo-chatbot-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: 8px;
}

.zalo-chatbot-school-vi {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary-blue);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.zalo-chatbot-school-en {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  font-style: italic;
}

.zalo-flyer-wrapper {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  margin-bottom: 20px;
  transition: all 0.4s ease;
  position: relative;
}

.zalo-flyer-wrapper:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(30, 58, 186, 0.2);
}

.zalo-flyer-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.4s ease;
}

.zalo-chatbot-footer-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
  font-weight: 500;
}

.signup-wrapper {
  width: 100%;
  padding: 40px 32px;
  border: 1px solid rgba(226, 232, 240, 0.8);
  position: relative;
  overflow: hidden;
  height: 100%;
}

.signup-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: var(--grad-accent);
}

.signup-header {
  text-align: center;
  margin-bottom: 36px;
}

.signup-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: 12px;
}

.signup-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid #CBD5E1;
  background-color: var(--bg-pure);
  border-radius: var(--radius-sm);
  color: var(--text-dark);
  font-family: var(--font-body);
  font-weight: 500;
  transition: all 0.3s ease;
}

.form-input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
  background-size: 16px;
  padding-right: 48px;
}

.btn-submit {
  width: 100%;
  padding: 16px;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 10px;
  animation: heartbeat 2.5s infinite;
}

/* Site Footer */
.site-footer {
  background-color: var(--primary-dark);
  color: #94A3B8;
  padding: 80px 0 30px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr;
  gap: 60px;
  margin-bottom: 50px;
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-light);
}

.footer-logo .logo-icon {
  fill: var(--text-light);
}

.footer-logo .logo-title {
  color: var(--text-light);
}

.footer-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--accent-red);
  border-radius: var(--radius-full);
}

.footer-about {
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-contacts {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 0.9rem;
}

.footer-contacts li {
  display: flex;
  gap: 12px;
}

.footer-contacts svg {
  color: var(--accent-red);
  flex-shrink: 0;
  margin-top: 4px;
}

.footer-contacts a:hover {
  color: var(--text-light);
}

.footer-map {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-socials {
  display: flex;
  gap: 14px;
}

.social-link {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
}

.social-link:hover {
  background: var(--accent-red);
  transform: translateY(-3px);
}

/* 12. Floating Widgets & Responsive Styles */
.sticky-float-widget {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.float-btn {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-pure);
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  cursor: pointer;
  transition: all 0.3s ease;
}

.zalo-float-wrapper {
  position: relative;
  display: inline-block;
}

.float-btn-zalo {
  background: #0068FF;
}

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

.zalo-qr-tooltip {
  position: absolute;
  right: 70px;
  bottom: 0;
  width: 180px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15);
  padding: 16px;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translateX(15px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  z-index: 1000;
}

.zalo-qr-tooltip::after {
  content: '';
  position: absolute;
  right: -6px;
  bottom: 22px;
  width: 12px;
  height: 12px;
  background: rgba(255, 255, 255, 0.98);
  border-right: 1px solid var(--border-light);
  border-top: 1px solid var(--border-light);
  transform: rotate(45deg);
}

.zalo-float-wrapper:hover .zalo-qr-tooltip {
  opacity: 1;
  pointer-events: all;
  transform: translateX(0) scale(1);
}

.zalo-qr-header {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.zalo-qr-tooltip-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(226, 232, 240, 0.8);
  margin-bottom: 6px;
}

.zalo-qr-footer {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-blue);
}

.float-btn-call {
  background: #10B981;
  animation: pulse 2s infinite;
}

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

/* Định vị cụm nút nổi Zalo & Gọi Hotline bên góc dưới - TRÁI */
.float-left-widgets {
  right: auto !important;
  left: 30px !important;
}

/* Điều chỉnh Tooltip QR Zalo hiển thị sang TRÊN - PHẢI */
.zalo-qr-tooltip-right {
  right: auto !important;
  left: 70px !important;
  transform: translateX(-15px) scale(0.95) !important;
}

.zalo-float-wrapper:hover .zalo-qr-tooltip-right {
  opacity: 1 !important;
  pointer-events: all !important;
  transform: translateX(0) scale(1) !important;
}

.zalo-qr-tooltip-right::after {
  right: auto !important;
  left: -6px !important;
  border-right: none !important;
  border-top: none !important;
  border-left: 1px solid var(--border-light) !important;
  border-bottom: 1px solid var(--border-light) !important;
}

/* Định vị nút VỀ ĐẦU TRANG (Back to Top) bên góc dưới - PHẢI */
.float-top-wrapper {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transform: translateY(15px);
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.float-top-wrapper.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.float-btn-top {
  background: var(--primary-navy);
}

.float-btn-top:hover {
  background: var(--primary-blue);
  transform: translateY(-3px);
}

/* Sticky Bottom Bar for Mobile Only */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 -4px 10px rgba(0,0,0,0.05);
  padding: 10px 16px;
  z-index: 999;
  border-top: 1px solid var(--border-light);
}

.mobile-sticky-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 12px;
}

.mobile-btn-call {
  border: 1px solid #10B981;
  color: #10B981;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 12px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.mobile-btn-reg {
  background: var(--grad-accent);
  color: var(--bg-pure);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 12px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* Registration Success Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
}

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

.success-modal {
  background: var(--bg-pure);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 480px;
  padding: 40px;
  text-align: center;
  position: relative;
  transform: scale(0.9);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .success-modal {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-icon {
  width: 72px;
  height: 72px;
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}

.modal-title {
  font-size: 1.6rem;
  color: var(--primary-navy);
  margin-bottom: 12px;
}

.modal-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* ==========================================================================
   13. ANIMATIONS
   ========================================================================== */
@keyframes pulse {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4); }
  70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(37, 99, 235, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

@keyframes heartbeat {
  0% { transform: scale(1); }
  14% { transform: scale(1.03); }
  28% { transform: scale(1); }
  42% { transform: scale(1.03); }
  70% { transform: scale(1); }
}

@keyframes morphBackground {
  0% { border-radius: 40% 60% 60% 40% / 50% 30% 70% 50%; }
  100% { border-radius: 60% 40% 40% 60% / 30% 60% 40% 70%; }
}

/* ==========================================================================
   14. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1200px) {
  .hero-title { font-size: 2.8rem; }
  .hero-img { height: 420px; }
  .reasons-grid { gap: 20px; }
}

@media (max-width: 1024px) {
  .section-padding { padding: 80px 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 600px; margin: 0 auto; }
  .hero-stats-badge { left: -10px; }
  .reasons-grid { grid-template-columns: repeat(2, 1fr); }
  .majors-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .abroad-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.2fr 1fr; gap: 40px; }
  .footer-column:last-child { grid-column: span 2; }
  .footer-map { height: 220px; }
}

@media (max-width: 768px) {
  .site-header { padding: 5px 0; }
  .nav-right { display: none; } /* Hide desktop nav right */
  .hero-title { font-size: 2.3rem; }
  .hero-cta-wrapper { flex-direction: column; align-items: flex-start; gap: 14px; }
  .hero-cta-wrapper .btn { width: 100%; }
  .section-title { font-size: 2rem; }
  .tabs-wrapper { flex-wrap: nowrap; overflow-x: auto; border-radius: 12px; padding: 4px; }
  .tab-btn { font-size: 0.8rem; padding: 10px 14px; }
  .tickets-grid { grid-template-columns: 1fr; gap: 20px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .signup-wrapper { padding: 32px 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-column:last-child { grid-column: span 1; }
  .footer-bottom { flex-direction: column; gap: 14px; text-align: center; }
  .sticky-float-widget { display: none; } /* Hide floating widgets on mobile */
  .mobile-sticky-bar { display: block; } /* Show sticky bar on mobile */
  body { padding-bottom: 60px; } /* Prevent sticky bar covering content */
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.9rem; }
  .reasons-grid { grid-template-columns: 1fr; }
  .majors-grid { grid-template-columns: 1fr; }
  .major-card { height: auto; min-height: 140px; }
  .abroad-grid { grid-template-columns: 1fr; }
}