:root {
  --page-download-bg: #08160F;
  --page-download-card-bg: #11271B;
  --page-download-text-main: #F2FFF6;
  --page-download-text-secondary: #A7D9B8;
  --page-download-border: #2E7A4E;
  --page-download-btn-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --page-download-glow: #57E38D;
  --page-download-gold: #F2C14E;
  --page-download-divider: #1E3A2A;
  --page-download-deep-green: #0A4B2C;
}

.page-download {
  background-color: var(--page-download-bg);
  color: var(--page-download-text-main); /* Dark background, so light text */
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

/* Base content area styling */
.page-download__content-area {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  box-sizing: border-box;
}

/* Headings */
.page-download h1,
.page-download h2,
.page-download h3 {
  color: var(--page-download-text-main);
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-download__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem); /* Using clamp for H1 font-size */
  font-weight: bold;
  text-align: center;
  margin-bottom: 25px;
  color: var(--page-download-text-main);
}

.page-download__section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: bold;
  text-align: center;
  margin-bottom: 30px;
  color: var(--page-download-text-main);
}

.page-download__guide-title,
.page-download__feature-title,
.page-download__feature-heading,
.page-download__requirement-heading {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--page-download-text-main);
  margin-bottom: 15px;
}

/* Paragraphs and lists */
.page-download p {
  margin-bottom: 15px;
  color: var(--page-download-text-secondary);
}

.page-download ul,
.page-download ol {
  list-style-position: inside;
  margin-bottom: 15px;
  padding-left: 20px;
  color: var(--page-download-text-secondary);
}

.page-download li {
  margin-bottom: 8px;
  color: var(--page-download-text-secondary);
}

/* Links */
.page-download a {
  color: var(--page-download-glow);
  text-decoration: none;
}

.page-download a:hover {
  text-decoration: underline;
}

/* Buttons */
.page-download__btn-primary,
.page-download__btn-secondary,
.page-download a[class*="button"],
.page-download a[class*="btn"] {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  box-sizing: border-box;
  white-space: normal; /* Allow text to wrap */
  word-wrap: break-word; /* Ensure long words break */
  max-width: 100%; /* Ensure button doesn't overflow */
}

.page-download__btn-primary {
  background: var(--page-download-btn-gradient);
  color: var(--page-download-text-main); /* Light text on gradient button */
  border: none;
}

.page-download__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(42, 209, 111, 0.4);
}

.page-download__btn-secondary {
  background: transparent;
  color: var(--page-download-glow); /* Light text for secondary button */
  border: 2px solid var(--page-download-glow);
}

.page-download__btn-secondary:hover {
  background: var(--page-download-glow);
  color: var(--page-download-bg); /* Dark text on hover */
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(87, 227, 141, 0.2);
}

.page-download__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
  flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
  width: 100%; /* Ensure container takes full width */
  max-width: 100%; /* Ensure container doesn't overflow */
  box-sizing: border-box;
  overflow: hidden;
}

.page-download__cta-center {
  text-align: center;
  margin-top: 30px;
}

/* Images */
.page-download img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 20px auto;
  border-radius: 8px;
  /* No filter properties to change color */
}

.page-download__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}

.page-download__hero-image {
  width: 100%;
  object-fit: cover;
  border-radius: 0; /* Hero image usually full width, no border-radius */
  margin: 0; /* Remove default margin */
}

.page-download__content-image {
  border: 1px solid var(--page-download-border);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-download__step-image {
  margin: 15px auto;
  border: 1px solid var(--page-download-border);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

/* Sections */
.page-download__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column; /* Image above text */
  align-items: center;
  padding: 10px 0 60px 0; /* Small top padding, larger bottom padding */
  background-color: var(--page-download-deep-green); /* Example background for hero */
}

.page-download__hero-content {
  max-width: 900px;
  margin: 30px auto 0 auto; /* Margin top to separate from image */
  padding: 0 20px;
  text-align: center;
}

.page-download__why-download,
.page-download__how-to-download,
.page-download__app-features,
.page-download__system-requirements,
.page-download__faq-section,
.page-download__cta-final {
  padding: 60px 0;
  border-top: 1px solid var(--page-download-divider);
}

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

.page-download__feature-card {
  background-color: var(--page-download-card-bg); /* Dark card background */
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  text-align: center;
  border: 1px solid var(--page-download-border);
}

.page-download__feature-card p {
  color: var(--page-download-text-secondary);
}

/* Download steps */
.page-download__download-steps {
  display: flex;
  flex-direction: column;
  gap: 50px;
  margin-top: 40px;
}

.page-download__platform-guide {
  background-color: var(--page-download-card-bg);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--page-download-border);
}

.page-download__step-list {
  list-style-type: decimal;
  padding-left: 25px;
  margin-top: 20px;
}

.page-download__step-item {
  margin-bottom: 25px;
  line-height: 1.8;
  color: var(--page-download-text-main);
}

.page-download__step-item strong {
  color: var(--page-download-glow);
  font-size: 1.1em;
}

/* App features list */
.page-download__features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.page-download__feature-item {
  background-color: var(--page-download-card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--page-download-border);
}

/* System requirements */
.page-download__requirements-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.page-download__requirement-item {
  background-color: var(--page-download-card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--page-download-border);
}

.page-download__requirement-item ul {
  padding-left: 20px;
  list-style-type: disc;
}

/* FAQ section */
.page-download__faq-list {
  margin-top: 30px;
}

.page-download__faq-item {
  background-color: var(--page-download-card-bg);
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--page-download-border);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.page-download__faq-item summary {
  list-style: none; /* Hide default marker */
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1.1em;
  color: var(--page-download-text-main);
  background-color: var(--page-download-card-bg);
}

.page-download__faq-item summary::-webkit-details-marker {
  display: none; /* Hide default marker for webkit browsers */
}

.page-download__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.page-download__faq-qtext {
  flex-grow: 1;
  color: var(--page-download-text-main);
}

.page-download__faq-toggle {
  font-size: 1.5em;
  margin-left: 15px;
  color: var(--page-download-glow);
}

.page-download__faq-item[open] .page-download__faq-toggle {
  content: '−'; /* Change to minus when open */
}

.page-download__faq-answer {
  padding: 0 25px 20px 25px;
  color: var(--page-download-text-secondary);
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .page-download__hero-content {
    margin-top: 20px;
  }
}

@media (max-width: 768px) {
  .page-download__hero-section {
    padding: 10px 0 40px 0; /* Adjust padding for mobile */
  }

  .page-download__main-title {
    font-size: 2.2rem;
  }

  .page-download__section-title {
    font-size: 1.8rem;
  }

  .page-download__guide-title,
  .page-download__feature-title,
  .page-download__feature-heading,
  .page-download__requirement-heading {
    font-size: 1.3rem;
  }

  .page-download__content-area {
    padding: 30px 15px; /* Add side padding */
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Images responsive */
  .page-download img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  /* Videos responsive (if any, though none currently in HTML) */
  .page-download video,
  .page-download__video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  
  .page-download__video-section,
  .page-download__video-container,
  .page-download__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }
  
  .page-download__video-section {
    padding-top: 10px !important; /* body đã xử lý --header-offset */
  }

  /* Buttons responsive */
  .page-download__cta-buttons {
    flex-direction: column; /* Stack buttons vertically */
    gap: 15px;
    padding: 0 15px; /* Add side padding to container */
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-download__btn-primary,
  .page-download__btn-secondary,
  .page-download a[class*="button"],
  .page-download a[class*="btn"] {
    width: 100% !important; /* Full width for buttons */
    max-width: 100% !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-download__feature-grid,
  .page-download__features-list,
  .page-download__requirements-list {
    grid-template-columns: 1fr; /* Single column layout */
    gap: 20px;
  }

  .page-download__platform-guide {
    padding: 25px;
  }

  .page-download__faq-item summary {
    padding: 15px 20px;
    font-size: 1em;
  }

  .page-download__faq-answer {
    padding: 0 20px 15px 20px;
  }
}

@media (max-width: 480px) {
  .page-download__main-title {
    font-size: 1.8rem;
  }
  .page-download__section-title {
    font-size: 1.5rem;
  }
  .page-download__cta-buttons {
    gap: 10px;
  }
}