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

:root {
  --primary-color: #1a5276;

  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --secondary: #7c3aed;
  --accent: #06b6d4;
  --text-dark: #1e293b;
  --text-medium: #475569;
  --text-light: #64748b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius: 14px;
  --transition: all 0.3s ease;
  --gradient-hero: radial-gradient(
      1200px 600px at 10% 10%,
      rgba(59, 130, 246, 0.12),
      transparent 60%
    ),
    radial-gradient(
      900px 500px at 90% 20%,
      rgba(124, 58, 237, 0.1),
      transparent 60%
    );
  --gradient-card: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.9),
    rgba(255, 255, 255, 0.96)
  );
  --gradient-text: linear-gradient(90deg, #2563eb, #06b6d4 40%, #7c3aed);
}

html,
body {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  color: var(--text-dark);
  background: radial-gradient(
      800px 400px at -10% -10%,
      rgba(37, 99, 235, 0.08),
      transparent 60%
    ),
    radial-gradient(
      800px 400px at 110% -10%,
      rgba(6, 182, 212, 0.07),
      transparent 60%
    ),
    var(--bg-light);
  line-height: 1.6;
}

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

/* Header */
header {
  padding: 18px 0;
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
}

.brand img {
  height: 42px;
  width: auto;
}

nav ul {
  list-style: none;
  display: flex;
}

nav a {
  color: var(--text-medium);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

nav a:hover {
  color: var(--primary);
}

nav a:after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary);
  transition: var(--transition);
}
nav a:hover:after {
  width: 100%;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-dark);
  transition: var(--transition);
}
.menu-toggle:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
}
.menu-toggle:hover {
  background-color: #f1f5f9;
}

.cta-link {
  padding: 10px 20px;
  background-color: var(--primary);
  color: white;
  border-radius: var(--radius);
  font-weight: 500;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.cta-link:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}


.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: clamp(520px, 78vh, 760px);
}
.hero:before {
  content: "";
  position: absolute;
  inset: 0 -10% auto -10%;
  height: 220px;
  background: radial-gradient(
    70% 60% at 50% -10%,
    rgba(37, 99, 235, 0.12),
    transparent 60%
  );
  pointer-events: none;
}
.hero-content h1 {
  font-family: "Playfair Display", serif;
  font-size: 3.25rem;
  line-height: 1.2;
  margin-bottom: 24px;
}
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 14px;
  border: 1px solid rgba(37, 99, 235, 0.18);
}
.hero-content p {
  font-size: 1.125rem;
  margin-bottom: 32px;
  max-width: 90%;
}
.hero-actions {
  display: flex;
  gap: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
}
.btn-primary {
  background-color: var(--primary);
  color: #fff;
  border: none;
}
.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px) scale(1.01);
  box-shadow: var(--shadow-lg);
}
.btn-secondary {
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-secondary:hover {
  background-color: rgba(37, 99, 235, 0.05);
  transform: translateY(-2px);
}
.hero-visual {
  border-radius: calc(var(--radius) + 6px);
  overflow: hidden;
  box-shadow: 0 20px 45px -20px rgba(37, 99, 235, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.6),
    rgba(255, 255, 255, 0.9)
  );
  height: 60%;
}
a {
  text-decoration: none;
}
.hero-visual video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  object-fit: cover;
  transition: var(--transition);
}

.hero-visual:hover video {
  transform: scale(1.02);
}
button {
  border: none;
  background-color: transparent;
  border-radius: 15px !important;
  height: 50px;
}
nav {
  display: flex;
  justify-content: space-between;
}
/* Media gallery */
.media-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.media-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 3;
}
.media-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.media-card:hover img {
  transform: scale(1.03);
}
.section-image {
  width: 100%;
  max-width: 900px;
  height: auto;
  display: block;
  margin: 24px auto 0;
  border-radius: var(--radius);
  box-shadow: 0 12px 30px -12px rgba(15, 23, 42, 0.25);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #fff;
  border: none;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 200;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Sections */
section {
  padding: 80px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-title {
  font-family: "Playfair Display", serif;
  font-size: 2.25rem;
  margin-bottom: 16px;
  color: var(--text-dark);
}
.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-medium);
  max-width: 700px;
  margin: 0 auto;
}

/* Split section */
.split-section .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}
.split-section .text-col .section-header {
  text-align: left;
  margin-bottom: 24px;
}
.split-section .text-col {
  max-width: 680px;
}
.split-section.reverse .text-col {
  order: 2;
}
.split-section.reverse .media-col {
  order: 1;
}
.split-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 20px 45px -20px rgba(37, 99, 235, 0.25);
  background: #fff;
}
.split-media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* Problem Solution */
.problem-solution {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.problem-card,
.solution-card {
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--gradient-card);
  border: 1px solid rgba(148, 163, 184, 0.25);
  transition: var(--transition);
}
.problem-card:hover,
.solution-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.problem-card {
  border-top: 4px solid #ef4444;
}
.solution-card {
  border-top: 4px solid var(--accent);
}
.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.card-header i {
  font-size: 1.5rem;
}
.problem-card .card-header i {
  color: #ef4444;
}
.solution-card .card-header i {
  color: var(--accent);
}
.card-title {
  font-size: 1.25rem;
  font-weight: 600;
}
.card-content {
  color: var(--text-medium);
  text-align: justify;
  text-justify: inter-word;
}

/* Benefits */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.benefit-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px 20px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.benefit-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}

.benefit-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #2563eb; /* xanh dương chính */
  background: #e0ecff; /* nền nhạt */
  transition: all 0.3s ease;
}

.benefit-card:hover .benefit-icon {
  background: #2563eb;
  color: #fff;
}

.benefit-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #1e293b;
}

.benefit-description {
  font-size: 14px;
  color: #475569;
  line-height: 1.6;
}
/* 🎨 Màu icon cho từng ô */
.benefit-card:nth-child(1) .benefit-icon {
  color: #2196f3;
} /* xanh dương */
.benefit-card:nth-child(2) .benefit-icon {
  color: #ff9800;
} /* cam */
.benefit-card:nth-child(3) .benefit-icon {
  color: #4caf50;
} /* xanh lá */
.benefit-card:nth-child(4) .benefit-icon {
  color: #9c27b0;
} /* tím */

/* 🌈 Hiệu ứng đổi màu nền nhẹ khi hover */
.benefit-card:nth-child(1):hover {
  background: #e3f2fd;
}
.benefit-card:nth-child(2):hover {
  background: #fff3e0;
}
.benefit-card:nth-child(3):hover {
  background: #e8f5e9;
}
.benefit-card:nth-child(4):hover {
  background: #f3e5f5;
}
/* Steps */
#quy-trinh {
  text-align: center;
  background: #f9fafc;
  padding: 60px 20px;
  font-family: "Inter", sans-serif;
}

#quy-trinh h2 {
  font-size: 32px;
  font-weight: 700;
  color: #1e2a5a;
}

#quy-trinh p {
  color: #555;
  margin-bottom: 40px;
  font-style: italic;
}

.steps {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 50px;
}

.row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.step {
  background: #fff;
  width: 200px;
  padding: 25px 15px;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.step:hover {
  transform: translateY(-8px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.icon {
  font-size: 30px;
}

.number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 10px auto;
  font-size: 18px;
  white-space: nowrap;
}

/* màu cho từng bước */
.color1 .number,
.color1 .icon {
  color: #2196f3;
}
.color2 .number,
.color2 .icon {
  color: #4caf50;
}
.color3 .number,
.color3 .icon {
  color: #ff9800;
}
.color4 .number,
.color4 .icon {
  color: #9c27b0;
}
.color5 .number,
.color5 .icon {
  color: #e91e63;
}
.color6 .number,
.color6 .icon {
  color: #00bcd4;
}
.color7 .number,
.color7 .icon {
  color: #795548;
}

.step h3 {
  font-size: 18px;
  color: #1e2a5a;
  margin-bottom: 8px;
}

.step p {
  font-size: 14px;
  color: #666;
}

/* bố cục kim tự tháp ngược */
.row.bottom {
  margin-top: -20px;
}

/* Modules */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 20px;
}

.module-card {
  position: relative;
  border-radius: 20px;
  background: #fff;
  border: 1px solid rgba(148, 163, 184, 0.15);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.module-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.module-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.module-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.module-card:hover .module-image img {
  transform: scale(1.1);
}

.module-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.module-card:hover .module-overlay {
  opacity: 1;
}

.module-content {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.module-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  transition: all 0.3s ease;
  position: relative;
  z-index: 2;
}

.module-school .module-icon {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.module-ebook .module-icon {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  box-shadow: 0 8px 20px rgba(240, 147, 251, 0.3);
}

.module-standard .module-icon {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  box-shadow: 0 8px 20px rgba(79, 172, 254, 0.3);
}

.module-icon i {
  font-size: 1.5rem;
  color: #fff;
}

.module-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
  text-align: center;
  line-height: 1.3;
}

.module-description {
  color: var(--text-medium);
  margin-bottom: 20px;
  text-align: center;
  line-height: 1.6;
  flex: 1;
}

.module-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: auto;
}

.feature-tag {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(37, 99, 235, 0.2);
  transition: all 0.3s ease;
}

.module-school .feature-tag {
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  border-color: rgba(102, 126, 234, 0.2);
}

.module-ebook .feature-tag {
  background: rgba(240, 147, 251, 0.1);
  color: #f093fb;
  border-color: rgba(240, 147, 251, 0.2);
}

.module-standard .feature-tag {
  background: rgba(79, 172, 254, 0.1);
  color: #4facfe;
  border-color: rgba(79, 172, 254, 0.2);
}

.module-card:hover .feature-tag {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Module specific hover effects */
.module-school:hover {
  border-color: rgba(102, 126, 234, 0.3);
}

.module-ebook:hover {
  border-color: rgba(240, 147, 251, 0.3);
}

.module-standard:hover {
  border-color: rgba(79, 172, 254, 0.3);
}

/* Users */
.users-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 20px;
}

.user-card {
  position: relative;
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(148, 163, 184, 0.15);
}

.user-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.user-avatar {
  position: relative;
  height: 120px;
  overflow: hidden;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.user-card:hover .user-avatar img {
  transform: scale(1.1);
}

.user-badge {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 2;
}

.user-education .user-badge {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.user-principal .user-badge {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.user-teacher .user-badge {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.user-student .user-badge {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.user-badge i {
  font-size: 1.1rem;
  color: #fff;
}

.user-content {
  padding: 32px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  text-align: center;
}

.user-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
  line-height: 1.3;
}

.user-description {
  color: var(--text-medium);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
  flex: 1;
}

.user-benefits {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.05);
  transition: all 0.3s ease;
  font-size: 0.85rem;
  font-weight: 500;
}

.user-education .benefit-item {
  background: rgba(102, 126, 234, 0.05);
  color: #667eea;
}

.user-principal .benefit-item {
  background: rgba(240, 147, 251, 0.05);
  color: #f093fb;
}

.user-teacher .benefit-item {
  background: rgba(79, 172, 254, 0.05);
  color: #4facfe;
}

.user-student .benefit-item {
  background: rgba(67, 233, 123, 0.05);
  color: #43e97b;
}

.benefit-item i {
  font-size: 0.9rem;
  width: 16px;
  text-align: center;
}

.user-card:hover .benefit-item {
  transform: translateX(4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* User card specific hover effects */
.user-education:hover {
  border-color: rgba(102, 126, 234, 0.3);
}

.user-principal:hover {
  border-color: rgba(240, 147, 251, 0.3);
}

.user-teacher:hover {
  border-color: rgba(79, 172, 254, 0.3);
}

.user-student:hover {
  border-color: rgba(67, 233, 123, 0.3);
}

/* CTA */
.cta-section {
  text-align: center;
  padding: 60px 0;
  background-color: var(--primary);
  color: white;
  border-radius: var(--radius);
}
.cta-title {
  font-family: "Playfair Display", serif;
  font-size: 2.25rem;
  margin-bottom: 16px;
}
.cta-description {
  font-size: 1.125rem;
  margin-bottom: 32px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.9;
}
.btn-white {
  background-color: white;
  color: var(--primary);
  border: none;
}
.btn-white:hover {
  background-color: #f1f5f9;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Footer */

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}
.footer-links a {
  color: #cbd5e1;
  transition: var(--transition);
}
.footer-links a:hover {
  color: #fff;
}

/* Responsive */
@media (max-width: 1200px) {
  .modules-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  .module-card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    margin: 0 auto;
  }
}
@media (max-width: 1024px) {
  .benefits-grid,
  .users-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .steps-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .split-section .container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .user-avatar {
    height: 100px;
  }
  .user-content {
    padding: 28px 20px 20px;
  }
}
@media (max-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    min-height: unset;
  }
  .hero-content h1 {
    font-size: 2.25rem;
  }
  .problem-solution {
    grid-template-columns: 1fr;
  }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
  nav ul {
    position: absolute;
    top: 72px;
    right: 24px;
    left: 24px;
    flex-direction: column;
    gap: 12px;
    background: rgba(255, 255, 255, 0.98);
    padding: 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
  }
  nav[aria-expanded="true"] ul {
    display: flex;
  }
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
  .modules-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .module-card:last-child {
    grid-column: 1;
    max-width: 100%;
    margin: 0;
  }
  .module-image {
    height: 180px;
  }
  .module-content {
    padding: 20px;
  }
  .module-title {
    font-size: 1.1rem;
  }
  .module-features {
    gap: 6px;
  }
  .feature-tag {
    font-size: 0.75rem;
    padding: 4px 10px;
  }
}
@media (max-width: 640px) {
  .benefits-grid,
  .users-grid,
  .steps-container {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .hero-content h1 {
    font-size: 1.875rem;
  }
  .user-avatar {
    height: 80px;
  }
  .user-content {
    padding: 24px 16px 16px;
  }
  .user-title {
    font-size: 1.1rem;
  }
  .user-description {
    font-size: 0.9rem;
  }
  .benefit-item {
    font-size: 0.8rem;
    padding: 6px 10px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

/* Screen-reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Nếu muốn thêm pattern chấm mờ */
#loi-ich {
  background: linear-gradient(135deg, #e3f0ff 0%, #cfd9f5 100%),
    url("https://www.transparenttextures.com/patterns/cubes.png");
  background-size: cover;
  padding: 60px 0;
  border-radius: 12px;
}

/* Phan-he section styling */
#phan-he {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

#phan-he::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(37, 99, 235, 0.03) 0%,
    transparent 70%
  );
  animation: float 20s ease-in-out infinite;
  pointer-events: none;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
}

/* Module card entrance animation */
.module-card {
  opacity: 0;
  transform: translateY(30px);
  animation: slideInUp 0.6s ease-out forwards;
}

.module-card:nth-child(1) {
  animation-delay: 0.1s;
}
.module-card:nth-child(2) {
  animation-delay: 0.2s;
}
.module-card:nth-child(3) {
  animation-delay: 0.3s;
}

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

/* Pulse effect for module icons */
.module-icon::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  border-radius: 16px;
  background: inherit;
  opacity: 0.3;
  transform: translate(-50%, -50%) scale(1);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.3;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 0.1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.3;
  }
}

/* Users section styling */
#nguoi-dung {
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

#nguoi-dung::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -30%;
  width: 60%;
  height: 60%;
  background: radial-gradient(
    circle,
    rgba(6, 182, 212, 0.05) 0%,
    transparent 70%
  );
  animation: float 25s ease-in-out infinite reverse;
  pointer-events: none;
}

/* User card entrance animation */
.user-card {
  opacity: 0;
  transform: translateY(40px);
  animation: slideInUp 0.8s ease-out forwards;
}

.user-card:nth-child(1) {
  animation-delay: 0.1s;
}
.user-card:nth-child(2) {
  animation-delay: 0.2s;
}
.user-card:nth-child(3) {
  animation-delay: 0.3s;
}
.user-card:nth-child(4) {
  animation-delay: 0.4s;
}

/* User badge pulse effect */
.user-badge::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: inherit;
  opacity: 0.3;
  transform: translate(-50%, -50%) scale(1);
  animation: badgePulse 3s infinite;
}
img {
  object-fit: contain;
  height: 100%;
}
nav {
    background-color: #389740;
    padding: 10px 0;
}

.nav-menu {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

.nav-menu a {
  color: white;
  font-weight: 500;
  padding: 5px 0;
  position: relative;
}

.nav-menu a:hover::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--accent-color);
}

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
}

.dropdown-toggle i {
  font-size: 12px;
  transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-toggle i {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: white;
  min-width: 250px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  border-radius: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  padding: 10px 0;
  margin-top: 10px;
  display: flex;
  flex-direction: column;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--dark-color);
  font-weight: 500;
  transition: all 0.3s ease;
  border-radius: 0;
  position: relative;
}

.dropdown-menu a:hover {
  background-color: var(--light-color);
  color: var(--primary-color);
  padding-left: 25px;
}

.dropdown-menu a:hover::after {
  display: none;
}

.dropdown-menu a i {
  color: var(--primary-color);
  width: 16px;
  text-align: center;
  font-size: 14px;
}
@keyframes badgePulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.3;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.3);
    opacity: 0.1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.3;
  }
}

/* Benefit item stagger animation */
.benefit-item {
  opacity: 0;
  transform: translateX(-20px);
  animation: slideInLeft 0.6s ease-out forwards;
}

.user-card:hover .benefit-item:nth-child(1) {
  animation-delay: 0.1s;
}
.user-card:hover .benefit-item:nth-child(2) {
  animation-delay: 0.2s;
}
.user-card:hover .benefit-item:nth-child(3) {
  animation-delay: 0.3s;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}


.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    font-family: var(--serif-font);
}

.footer-section p {
    margin-bottom: 20px;
    color: #ccc;
}

.footer-section ul li {
    margin-bottom: 10px;
}

    .footer-section ul li a {
        color: #ccc;
        transition: color 0.3s;
    }

        .footer-section ul li a:hover {
            color: white;
        }
.social-icons {
    display: flex;
    gap: 15px;
}

    .social-icons a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background-color: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
        transition: background-color 0.3s;
    }

        .social-icons a:hover {
            background-color: var(--accent-color);
        }

.newsletter input {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: none;
    border-radius: 4px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #ccc;
    background: linear-gradient(180deg, #0f172a, #0b1220);
}

/* Footer contact block */
.footer-contact {
    padding-top: 15px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
}

.footer-contact-item {
    color: #ddd;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

    .footer-contact-item i {
        width: 18px;
        color: var(--accent-color);
    }

footer {
    background: linear-gradient(180deg, #0f172a, #0b1220);
    color: white;
    padding: 60px 0 20px;
}
.category-nav .category-trigger:before {
    position: absolute;
    content: "\f078";
    font-size: 12px;
    right: 0;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    height: 100%;
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    top: 0;
    margin-right: 0;
}
@media (max-width: 768px) {
    .header-bottom-page-v2 {
        display: none;
    }
    .mobile-header .site-brand {
        padding: 0px 0 0px 0;
    }

    .mobile-header img {
        max-width: 100%;
        height: auto;
    }
}