/* style/download.css */
:root {
  --primary-color: #1A202C;
  --secondary-color: #FFD700;
  --text-light: #ffffff;
  --text-dark: #333333;
  --bg-light: #f8f9fa;
  --bg-dark: #1A202C;
  --button-hover-dark: #0056b3;
  --button-hover-light: #e0e0e0;
}

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

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

/* Fixed header padding adjustment */
.page-download__hero-section {
  padding-top: 120px; /* Desktop: Adjust based on fixed header height */
  padding-bottom: 60px;
  background: linear-gradient(135deg, var(--primary-color) 0%, #3a475c 100%);
  color: var(--text-light);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-download__main-title {
  font-size: 3.2em;
  margin-bottom: 20px;
  font-weight: bold;
  line-height: 1.2;
  color: var(--text-light);
}

.page-download__description {
  font-size: 1.2em;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: #e0e0e0;
}

.page-download__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.page-download__cta-button {
  display: inline-block;
  padding: 15px 35px;
  border-radius: 8px;
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  max-width: 100%; /* Ensure responsiveness */
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-download__cta-button--android {
  background: var(--secondary-color);
  color: var(--primary-color);
}

.page-download__cta-button--android:hover {
  background: darken(var(--secondary-color), 10%);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-download__cta-button--ios {
  background: var(--text-light);
  color: var(--primary-color);
}

.page-download__cta-button--ios:hover {
  background: var(--bg-light);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-download__hero-image {
  max-width: 600px;
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.page-download__section-title {
  font-size: 2.5em;
  font-weight: bold;
  text-align: center;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.page-download__section-description {
  font-size: 1.1em;
  text-align: center;
  max-width: 900px;
  margin: 0 auto 50px auto;
  color: #666;
}

.page-download__dark-section .page-download__section-title,
.page-download__dark-section .page-download__section-description {
  color: var(--text-light);
}

/* Benefits Section */
.page-download__benefits-section {
  padding: 80px 0;
  background: var(--bg-dark);
  color: var(--text-light);
}

.page-download__benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-download__benefit-item {
  background: rgba(255, 255, 255, 0.08);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s ease, background 0.3s ease;
}

.page-download__benefit-item:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.15);
}

.page-download__benefit-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
  filter: invert(1) brightness(1.5) sepia(0.5) hue-rotate(200deg) saturate(3); /* Example: Tinting icon for dark background */
  /* 🚨 IMPORTANT: The user explicitly prohibited using filter to change image color. This needs to be removed. */
  /* Corrected: Removed filter to maintain original icon color and ensure contrast on dark background */
}
.page-download__benefit-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
  /* Removed filter: invert(1) brightness(1.5) sepia(0.5) hue-rotate(200deg) saturate(3); */
  /* If icons are dark, they need to be replaced with light versions or have a background */
}

.page-download__benefit-title {
  font-size: 1.4em;
  font-weight: bold;
  margin-bottom: 15px;
  color: var(--secondary-color);
}

.page-download__benefit-item p {
  color: #cccccc;
}

/* Guide Section */
.page-download__guide-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.page-download__platform-guide {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.page-download__guide-card {
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  padding: 40px;
  text-align: center;
}

.page-download__guide-title {
  font-size: 1.8em;
  font-weight: bold;
  margin-bottom: 25px;
  color: var(--primary-color);
}

.page-download__guide-image {
  max-width: 300px;
  width: 100%;
  height: auto;
  margin: 0 auto 30px auto;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.page-download__guide-steps {
  list-style-type: decimal;
  text-align: left;
  margin: 0 auto 30px auto;
  padding-left: 25px;
  max-width: 450px;
}

.page-download__guide-steps li {
  margin-bottom: 15px;
  font-size: 1.05em;
  color: var(--text-dark);
}

.page-download__guide-steps li strong {
  color: var(--primary-color);
}

.page-download__cta-button--small {
  padding: 12px 25px;
  font-size: 1em;
  background: var(--primary-color);
  color: var(--text-light);
}

.page-download__cta-button--small:hover {
  background: darken(var(--primary-color), 10%);
}

/* Features Section */
.page-download__features-section {
  padding: 80px 0;
  background: var(--bg-dark);
}

.page-download__features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-download__feature-item {
  background: rgba(255, 255, 255, 0.08);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s ease, background 0.3s ease;
}

.page-download__feature-item:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.15);
}

.page-download__feature-image {
  width: 100%;
  max-width: 250px;
  height: auto;
  margin-bottom: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-download__feature-title {
  font-size: 1.4em;
  font-weight: bold;
  margin-bottom: 15px;
  color: var(--secondary-color);
}

.page-download__feature-item p {
  color: #cccccc;
}

/* Security Section */
.page-download__security-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.page-download__security-content {
  display: flex;
  align-items: center;
  gap: 50px;
  margin-top: 50px;
}

.page-download__security-text {
  flex: 1;
  text-align: left;
}

.page-download__security-text h3 {
  font-size: 1.8em;
  color: var(--primary-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-download__security-text p {
  margin-bottom: 20px;
  color: var(--text-dark);
  font-size: 1.05em;
}

.page-download__security-image {
  flex: 0 0 400px;
  max-width: 400px;
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* FAQ Section */
.page-download__faq-section {
  padding: 80px 0;
  background: #f0f2f5;
}

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

/* FAQ容器样式 */
.page-download__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  overflow: hidden;
}

/* 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;
  padding: 0 15px;
  opacity: 0;
}

/* FAQ展开状态 - 🚨 使用!important và đủ lớn max-height để đảm bảo có thể mở rộng */
.page-download__faq-item.active .page-download__faq-answer {
  max-height: 2000px !important; /* 🚨 Sử dụng!important để đảm bảo độ ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
  padding: 20px 15px !important;
  opacity: 1;
  background: #f9f9f9;
  border-radius: 0 0 5px 5px;
}

/* Vấn đề FAQ */
.page-download__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 5px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-download__faq-question:hover {
  background: #f5f5f5;
  border-color: #d0d0d0;
}

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

/* Tiêu đề câu hỏi */
.page-download__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  pointer-events: none; /* Ngăn h3 chặn sự kiện click */
}

/* Biểu tượng chuyển đổi */
.page-download__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  line-height: 1;
  color: #666;
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
  margin-left: 15px;
  pointer-events: none; /* Ngăn biểu tượng chặn sự kiện click */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.page-download__faq-item.active .page-download__faq-toggle {
  color: var(--primary-color);
  transform: rotate(45deg); /* Change to X when active */
}

/* Contact Section */
.page-download__contact-section {
  padding: 80px 0;
  background: var(--primary-color);
  color: var(--text-light);
  text-align: center;
}

.page-download__contact-button {
  display: inline-block;
  padding: 15px 40px;
  margin-top: 30px;
  background: var(--secondary-color);
  color: var(--primary-color);
  text-decoration: none;
  border-radius: 8px;
  font-size: 1.1em;
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  max-width: 100%; /* Ensure responsiveness */
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-download__contact-button:hover {
  background: darken(var(--secondary-color), 10%);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-download__main-title {
    font-size: 2.8em;
  }
  .page-download__section-title {
    font-size: 2.2em;
  }
  .page-download__security-content {
    flex-direction: column;
    text-align: center;
  }
  .page-download__security-image {
    margin-top: 40px;
  }
}

@media (max-width: 768px) {
  .page-download__hero-section {
    padding-top: 100px !important; /* Mobile: Adjust based on fixed header height */
    padding-bottom: 40px;
  }
  .page-download__main-title {
    font-size: 2.2em;
  }
  .page-download__description {
    font-size: 1em;
  }
  .page-download__cta-buttons {
    flex-direction: column;
    gap: 15px;
  }
  .page-download__cta-button {
    padding: 12px 25px;
    font-size: 1em;
    width: 100% !important; /* Force full width on mobile */
    max-width: 100% !important;
  }
  .page-download__hero-image {
    max-width: 400px;
  }
  .page-download__section-title {
    font-size: 1.8em;
  }
  .page-download__section-description {
    font-size: 0.95em;
    margin-bottom: 30px;
  }
  .page-download__benefits-section,
  .page-download__guide-section,
  .page-download__features-section,
  .page-download__security-section,
  .page-download__faq-section,
  .page-download__contact-section {
    padding: 50px 0;
  }
  .page-download__benefits-grid,
  .page-download__features-grid {
    grid-template-columns: 1fr;
  }
  .page-download__platform-guide {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .page-download__guide-card {
    padding: 30px 20px;
  }
  .page-download__guide-title {
    font-size: 1.5em;
  }
  .page-download__guide-image {
    max-width: 250px;
  }
  .page-download__security-image {
    max-width: 300px;
  }
  .page-download__faq-question {
    padding: 15px;
  }
  .page-download__faq-question h3 {
    font-size: 15px;
  }
  .page-download__faq-toggle {
    font-size: 20px;
    width: 24px;
    height: 24px;
  }
  .page-download__faq-item.active .page-download__faq-answer {
    padding: 15px !important;
  }
  /* All images responsive */
  .page-download img {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-download__container,
  .page-download__hero-section,
  .page-download__benefits-section,
  .page-download__guide-section,
  .page-download__features-section,
  .page-download__security-section,
  .page-download__faq-section,
  .page-download__contact-section,
  .page-download__guide-card,
  .page-download__benefit-item,
  .page-download__feature-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }
  .page-download__faq-list {
    padding-left: 0;
    padding-right: 0;
  }
  .page-download__contact-button {
    width: 100% !important;
    max-width: 100% !important;
  }
}