:root {
  --primary-color: #017439; /* tj77 primary green */
  --secondary-color: #FFFFFF; /* tj77 auxiliary white */
  --btn-register-login-bg: #C30808; /* Custom for register/login buttons */
  --btn-register-login-text: #FFFF00; /* Custom for register/login button text */
  --background-color-body: #0a0a0a; /* From shared.css, dark */
  --text-color-on-dark: #ffffff;
  --text-color-on-light: #333333;
  --header-offset: 120px; /* Default value, will be overridden by shared.css */
}

/* Base styles for the page content, considering dark body background */
.page-index {
  background-color: var(--background-color-body);
  color: var(--text-color-on-dark);
  font-family: Arial, sans-serif;
  line-height: 1.6;
  padding-bottom: 60px; /* General padding for the bottom */
  overflow-x: hidden; /* Prevent horizontal scroll */
}

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

/* Video Section */
.page-index__video-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  padding-top: var(--header-offset, 120px); /* Ensure space below fixed header */
  background-color: #0a0a0a; /* Match body background for seamless transition */
}

.page-index__video-container {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.page-index__video-link {
  display: block;
  text-decoration: none;
  position: relative;
  width: 100%;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-radius: 8px; /* Apply border-radius here to affect the whole clickable area */
  overflow: hidden; /* Ensure rounded corners for video */
}

.page-index__video-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-index__video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.page-index__video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 8px;
  object-fit: cover;
  pointer-events: none; /* Prevent video controls from interfering with link click */
  background-color: #000; /* Fallback for video area */
}

.page-index__video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
}

.page-index__video-link:hover .page-index__video-overlay {
  opacity: 1;
}

.page-index__video-click-hint {
  color: #ffffff;
  font-size: 18px;
  font-weight: bold;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  padding: 10px 20px;
  background: rgba(1, 116, 57, 0.8); /* Use primary color with transparency */
  border-radius: 5px;
  white-space: nowrap;
}

.page-index__video-cta {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 30px;
}

.page-index__play-now-button {
  display: inline-block;
  padding: 15px 40px;
  background: var(--btn-register-login-bg); /* Custom red for Play Now */
  color: var(--btn-register-login-text); /* Custom yellow for Play Now text */
  text-decoration: none;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  min-width: 180px; /* Ensure button is not too small */
}

.page-index__play-now-button:hover {
  background: #a10707; /* Darken on hover */
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* H1 Title + Activity Promotion Buttons */
.page-index__title-section {
  text-align: center;
  padding: 80px 20px;
  background-color: var(--primary-color); /* Use primary color as background */
  color: var(--secondary-color); /* White text on primary background */
}

.page-index__title-container {
  max-width: 900px;
  margin: 0 auto;
}

.page-index__main-title {
  font-size: 42px;
  margin-bottom: 20px;
  line-height: 1.2;
  color: var(--secondary-color); /* White text */
}

.page-index__title-description {
  font-size: 18px;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--secondary-color); /* White text */
}

.page-index__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.page-index__cta-button {
  display: inline-block;
  padding: 15px 30px;
  text-decoration: none;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  transition: all 0.3s ease;
  min-width: 180px;
  text-align: center;
  box-sizing: border-box;
}

.page-index__btn-primary {
  background: var(--btn-register-login-bg); /* Red for primary CTA */
  color: var(--btn-register-login-text); /* Yellow for primary CTA text */
  border: 2px solid var(--btn-register-login-bg);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-index__btn-primary:hover {
  background: #a10707;
  border-color: #a10707;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.page-index__btn-secondary {
  background: var(--secondary-color); /* White for secondary CTA */
  color: var(--primary-color); /* Green text on white */
  border: 2px solid var(--primary-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.page-index__btn-secondary:hover {
  background: #f0f0f0;
  border-color: #005a2e; /* Darken primary color */
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

/* Brand Introduction */
.page-index__brand-section {
  padding: 80px 20px;
  background-color: var(--background-color-body); /* Dark background */
  color: var(--text-color-on-dark); /* White text */
}

.page-index__brand-container {
  max-width: 1200px;
  margin: 0 auto;
}

.page-index__brand-title {
  font-size: 36px;
  text-align: center;
  margin-bottom: 50px;
  color: var(--primary-color); /* Primary green for title */
}

.page-index__brand-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.page-index__brand-item {
  background-color: rgba(255, 255, 255, 0.05); /* Slightly lighter card on dark background */
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-index__brand-item-title {
  font-size: 24px;
  color: var(--primary-color); /* Primary green for item titles */
  margin-bottom: 15px;
}

.page-index__brand-item p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-color-on-dark);
}

.page-index__brand-features-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-index__brand-features-list li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
  color: var(--text-color-on-dark);
}

.page-index__brand-features-list li::before {
  content: '✓';
  color: var(--btn-register-login-text); /* Yellow checkmark */
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* FAQ Section */
.page-index__faq-section {
  padding: 80px 20px;
  background-color: #1a1a1a; /* A slightly different dark background for contrast */
  color: var(--text-color-on-dark);
}

.page-index__faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.page-index__faq-main-title {
  font-size: 36px;
  text-align: center;
  margin-bottom: 50px;
  color: var(--primary-color); /* Primary green for title */
}

/* details as FAQ card */
details.page-index__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05); /* Lighter card on dark background */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

details.page-index__faq-item summary.page-index__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--text-color-on-dark);
}

details.page-index__faq-item summary.page-index__faq-question::-webkit-details-marker {
  display: none;
}

details.page-index__faq-item summary.page-index__faq-question:hover {
  background: rgba(255, 255, 255, 0.1);
}

.page-index__faq-qtext {
  flex: 1;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--text-color-on-dark); /* White text */
}

.page-index__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color); /* Primary green for toggle icon */
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}

details.page-index__faq-item .page-index__faq-answer {
  padding: 0 25px 20px;
  background: rgba(255, 255, 255, 0.03); /* Even lighter background for answer */
  border-radius: 0 0 8px 8px;
  color: var(--text-color-on-dark);
}

.page-index__faq-answer p {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-color-on-dark);
}

/* Blog List Display */
.page-index__blog-section {
  padding: 80px 20px;
  background-color: var(--background-color-body); /* Dark background */
  color: var(--text-color-on-dark);
}

.page-index__blog-container {
  max-width: 1200px;
  margin: 0 auto;
}

.page-index__blog-title {
  font-size: 36px;
  text-align: center;
  margin-bottom: 50px;
  color: var(--primary-color); /* Primary green for title */
}

.page-index__blog-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.page-index__blog-item {
  background-color: rgba(255, 255, 255, 0.05); /* Lighter card on dark background */
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-index__blog-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.page-index__blog-item-image {
  width: 100%;
  height: 250px; /* Fixed height for consistency */
  object-fit: cover;
  display: block;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.page-index__blog-item-content {
  padding: 20px;
}

.page-index__blog-link {
  text-decoration: none;
  color: inherit;
}

.page-index__blog-item-title {
  font-size: 20px;
  color: var(--primary-color); /* Primary green for blog titles */
  margin-top: 0;
  margin-bottom: 10px;
  line-height: 1.4;
  transition: color 0.3s ease;
}

.page-index__blog-link:hover .page-index__blog-item-title {
  color: var(--btn-register-login-text); /* Yellow on hover */
}

.page-index__blog-item-excerpt {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 15px;
  line-height: 1.6;
}

.page-index__blog-item-date {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  display: block;
}

.page-index__view-all-button-container {
    text-align: center;
    margin-top: 50px;
}

/* Reusing btn-secondary for "Xem Tất Cả Tin Tức" button */
.page-index__view-all-button {
  display: inline-block;
  padding: 12px 25px;
  text-decoration: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  transition: all 0.3s ease;
  min-width: 150px;
  text-align: center;
  box-sizing: border-box;
  background: var(--secondary-color); /* White */
  color: var(--primary-color); /* Green text */
  border: 2px solid var(--primary-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-index__view-all-button:hover {
  background: #f0f0f0;
  border-color: #005a2e;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-index__main-title {
    font-size: 38px;
  }
  .page-index__title-description {
    font-size: 17px;
  }
  .page-index__brand-title, .page-index__faq-main-title, .page-index__blog-title {
    font-size: 32px;
  }
  .page-index__blog-item-image {
    height: 200px;
  }
}

@media (max-width: 768px) {
  .page-index {
    font-size: 16px;
    line-height: 1.6;
  }
  
  /* General padding for sections on mobile */
  .page-index__video-section,
  .page-index__title-section,
  .page-index__brand-section,
  .page-index__faq-section,
  .page-index__blog-section {
    padding: 40px 15px !important; /* Important for mobile override */
    padding-top: var(--header-offset, 120px) !important; /* Header offset on video section */
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important; /* Prevent horizontal scroll */
  }

  /* Video Section Mobile */
  .page-index__video-container,
  .page-index__video-link,
  .page-index__video-wrapper,
  .page-index__video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important; /* Ensure video scales */
    box-sizing: border-box !important;
    overflow: hidden !important;
  }

  .page-index__video-wrapper {
    padding-bottom: 56.25% !important; /* Maintain aspect ratio */
  }

  .page-index__video-click-hint {
    font-size: 14px !important;
    padding: 8px 16px !important;
  }
  
  .page-index__video-cta {
    margin-top: 20px;
    padding: 0 15px; /* Add padding to container */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .page-index__play-now-button {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 25px !important;
    font-size: 16px !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* H1 Title Section Mobile */
  .page-index__main-title {
    font-size: 28px;
    margin-bottom: 15px;
  }
  .page-index__title-description {
    font-size: 15px;
    margin-bottom: 30px;
  }
  .page-index__cta-buttons {
    flex-direction: column;
    gap: 15px;
  }
  .page-index__cta-button {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 20px !important;
    font-size: 16px !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* Brand Section Mobile */
  .page-index__brand-title, .page-index__faq-main-title, .page-index__blog-title {
    font-size: 28px;
    margin-bottom: 30px;
  }
  .page-index__brand-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .page-index__brand-item-title {
    font-size: 22px;
  }
  .page-index__brand-item p, .page-index__brand-features-list li {
    font-size: 15px;
  }

  /* FAQ Section Mobile */
  details.page-index__faq-item summary.page-index__faq-question {
    padding: 15px 20px;
  }
  .page-index__faq-qtext {
    font-size: 16px;
  }
  details.page-index__faq-item .page-index__faq-answer {
    padding: 0 20px 15px;
  }
  .page-index__faq-answer p {
    font-size: 15px;
  }

  /* Blog Section Mobile */
  .page-index__blog-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-index__blog-item-image {
    height: 180px;
  }
  .page-index__blog-item-title {
    font-size: 18px;
  }
  .page-index__blog-item-excerpt {
    font-size: 14px;
  }
  .page-index__view-all-button-container {
    margin-top: 30px;
    padding: 0 15px; /* Add padding to container */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
  .page-index__view-all-button {
    width: 100% !important;
    max-width: 100% !important;
    padding: 10px 20px !important;
    font-size: 15px !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }
}