:root {
  --primary-color: #017439;
  --secondary-color: #FFFFFF;
  --text-dark: #333333;
  --text-light: #ffffff;
  --button-register-bg: #C30808;
  --button-login-bg: #C30808;
  --button-text-yellow: #FFFF00;
  --border-light: #e0e0e0;
  --background-light: #f9f9f9;
}

.page-download {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--text-dark); /* Default text color for light background */
  background-color: var(--secondary-color); /* Body background is white */
}

.page-download__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.page-download__section-title {
  font-size: 36px;
  font-weight: bold;
  color: var(--primary-color);
  text-align: center;
  margin-bottom: 40px;
  position: relative;
  padding-bottom: 15px;
}

.page-download__section-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

.page-download__section-title--white {
  color: var(--text-light);
}

.page-download__section-title--white::after {
  background-color: var(--text-light);
}

.page-download__text-block {
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: 20px;
  text-align: center;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-download__text-block--white {
  color: var(--text-light);
}

/* Hero Section */
.page-download__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  padding-top: var(--header-offset, 120px); /* Fixed header spacing */
  background: linear-gradient(135deg, var(--primary-color) 0%, #000000 100%); /* Darker gradient for hero */
}

.page-download__hero-container {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
}

.page-download__hero-image {
  width: 100%;
  margin-bottom: 30px;
}

.page-download__hero-image img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.page-download__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
}

.page-download__hero-content h1 {
  font-size: 48px;
  margin-bottom: 20px;
  line-height: 1.2;
  color: var(--text-light);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-download__hero-content p {
  font-size: 20px;
  margin-bottom: 30px;
  color: var(--text-light);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.page-download__cta-button {
  display: inline-block;
  padding: 18px 45px;
  text-decoration: none;
  border-radius: 8px;
  font-size: 20px;
  font-weight: bold;
  margin: 10px;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-download__btn-primary {
  background: var(--button-register-bg); /* Use specific register color */
  color: var(--button-text-yellow); /* Use specific button text color */
  border: 2px solid var(--button-register-bg);
}

.page-download__btn-primary:hover {
  background: #a80707; /* Slightly darker red */
  border-color: #a80707;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.page-download__btn-secondary {
  background: var(--primary-color); /* Primary color for secondary button */
  color: var(--text-light);
  border: 2px solid var(--primary-color);
}

.page-download__btn-secondary:hover {
  background: #005a2e; /* Slightly darker green */
  border-color: #005a2e;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* Intro Section */
.page-download__intro-section {
  padding: 60px 0;
  background-color: var(--secondary-color); /* Light background */
}

.page-download__feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.page-download__feature-item {
  background: var(--background-light);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-download__feature-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-download__feature-item img {
  
  
  object-fit: contain;
  margin-bottom: 20px;
}

.page-download__feature-item h3 {
  font-size: 22px;
  color: var(--primary-color);
  margin-bottom: 15px;
}

/* Guide Section */
.page-download__guide-section {
  padding: 60px 0;
  background-color: var(--primary-color); /* Dark background */
  color: var(--text-light);
}

.page-download__step-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.page-download__step-item {
  background: rgba(255, 255, 255, 0.1);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-download__step-icon {
  width: 60px;
  height: 60px;
  background: var(--text-light);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.page-download__step-item h3 {
  font-size: 24px;
  color: var(--text-light);
  margin-bottom: 15px;
}

.page-download__step-item p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 20px;
}

.page-download__step-item img {
  width: 100%;
  height: auto;
  max-width: 400px; /* Constrain image width within step */
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.page-download__cta-area {
  text-align: center;
  margin-top: 50px;
}

/* Features Section */
.page-download__features-section {
  padding: 60px 0;
  background-color: var(--background-light); /* Light background */
}

.page-download__grid {
  display: grid;
  gap: 30px;
  margin-top: 50px;
}

.page-download__grid--2-col {
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

.page-download__feature-card {
  background: var(--secondary-color);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-download__feature-card img {
  width: 100%;
  height: auto;
  max-width: 600px; /* Max width for feature card images */
  border-radius: 8px;
  margin-bottom: 25px;
  object-fit: cover;
}

.page-download__feature-card h3 {
  font-size: 24px;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-download__feature-card p {
  font-size: 16px;
  color: var(--text-dark);
}

/* Safety Section */
.page-download__safety-section {
  padding: 60px 0;
  background-color: var(--primary-color); /* Dark background */
  color: var(--text-light);
}

.page-download__safety-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.page-download__safety-item {
  background: rgba(255, 255, 255, 0.1);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-download__safety-item img {
  
  
  object-fit: contain;
  margin-bottom: 20px;
}

.page-download__safety-item h3 {
  font-size: 22px;
  color: var(--text-light);
  margin-bottom: 15px;
}

.page-download__safety-item p {
  color: rgba(255, 255, 255, 0.9);
}

/* FAQ Section */
.page-download__faq-section {
  padding: 60px 0;
  background-color: var(--secondary-color); /* Light background */
}

.page-download__faq-list {
  max-width: 900px;
  margin: 50px auto 0 auto;
}

/* FAQ容器样式 */
.page-download__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

/* FAQ默认状态 - 答案隐藏 */
.page-download__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
  padding: 0 25px;
  opacity: 0;
  color: var(--text-dark);
}

/* FAQ展开状态 - 🚨 使用!important và đủ lớn max-height để đảm bảo mở rộng */
.page-download__faq-item.active .page-download__faq-answer {
  max-height: 2000px !important; /* 🚨 Sử dụng!important để đảm bảo ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
  padding: 20px 25px !important;
  opacity: 1;
  background: var(--background-light);
  border-radius: 0 0 8px 8px;
}

/* Question style */
.page-download__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  background: var(--secondary-color);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-download__faq-item.active .page-download__faq-question {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom-color: transparent;
}

.page-download__faq-question:hover {
  background: var(--background-light);
  border-color: #d0d0d0;
}

.page-download__faq-question:active {
  background: #eeeeee;
}

/* Question title style */
.page-download__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--primary-color);
  pointer-events: none; /* Prevent h3 from blocking click event */
}

/* Toggle icon */
.page-download__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  line-height: 1;
  color: var(--primary-color);
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
  margin-left: 20px;
  pointer-events: none; /* Prevent icon from blocking click event */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.page-download__faq-item.active .page-download__faq-toggle {
  transform: rotate(45deg); /* Use rotation for minus sign */
  color: var(--button-register-bg); /* Red for active toggle */
}

/* Final CTA Section */
.page-download__final-cta-section {
  padding: 60px 20px;
  background: linear-gradient(90deg, #000000 0%, var(--primary-color) 100%);
  color: var(--text-light);
  text-align: center;
}

.page-download__cta-buttons {
  display: flex;
  flex-wrap: wrap; /* Allow wrapping for multiple buttons */
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
  .page-download__hero-content h1 {
    font-size: 42px;
  }
  .page-download__hero-content p {
    font-size: 18px;
  }
  .page-download__cta-button {
    padding: 16px 40px;
    font-size: 18px;
  }
  .page-download__section-title {
    font-size: 32px;
  }
  .page-download__grid--2-col {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
}

@media (max-width: 768px) {
  .page-download__hero-section {
    padding-top: var(--header-offset, 120px) !important; /* Mobile fixed header spacing */
    padding-bottom: 40px;
  }
  .page-download__hero-content h1 {
    font-size: 32px;
    margin-bottom: 15px;
  }
  .page-download__hero-content p {
    font-size: 16px;
    margin-bottom: 20px;
  }
  .page-download__cta-button {
    padding: 14px 30px;
    font-size: 16px;
    width: 100% !important; /* Force full width for buttons */
    max-width: 300px !important; /* Max width for individual buttons on mobile */
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }
  .page-download__cta-buttons {
    flex-direction: column; /* Stack buttons vertically on mobile */
    align-items: center;
    gap: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-download__container {
    padding: 30px 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-download__section-title {
    font-size: 28px;
    margin-bottom: 30px;
  }

  .page-download__text-block {
    font-size: 15px;
    text-align: left; /* Align text left for better readability on mobile */
  }

  /* Images responsive styles */
  .page-download img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block;
  }
  
  .page-download__section,
  .page-download__card,
  .page-download__container,
  .page-download__hero-section,
  .page-download__intro-section,
  .page-download__guide-section,
  .page-download__features-section,
  .page-download__safety-section,
  .page-download__faq-section,
  .page-download__final-cta-section {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-download__feature-grid,
  .page-download__step-grid,
  .page-download__grid--2-col,
  .page-download__safety-grid {
    grid-template-columns: 1fr; /* Single column on mobile */
  }

  .page-download__feature-item img,
  .page-download__safety-item img {
    
    
  }

  .page-download__faq-question {
    padding: 15px 20px;
  }

  .page-download__faq-question h3 {
    font-size: 16px;
  }

  .page-download__faq-toggle {
    font-size: 24px;
    width: 28px;
    height: 28px;
  }

  .page-download__faq-item.active .page-download__faq-answer {
    padding: 15px 20px !important;
  }
}

@media (max-width: 480px) {
  .page-download__hero-content h1 {
    font-size: 28px;
  }
  .page-download__hero-content p {
    font-size: 15px;
  }
  .page-download__section-title {
    font-size: 24px;
  }
  .page-download__cta-button {
    font-size: 15px;
    padding: 12px 25px;
  }
}