/* Base Styles for Khuyến Mãi Page */
.page-khuyen-mai {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: #333333; /* Default text color for light background */
  background-color: #FFFFFF; /* Default body background is white */
}

.page-khuyen-mai__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 15px;
  box-sizing: border-box;
}

.page-khuyen-mai__section {
  padding: 40px 0;
  margin-bottom: 20px;
}

.page-khuyen-mai__section-title {
  font-size: 36px;
  font-weight: 700;
  color: #017439;
  text-align: center;
  margin-bottom: 30px;
  line-height: 1.2;
}

.page-khuyen-mai__section-title--light {
  color: #FFFFFF;
}

.page-khuyen-mai__text-block {
  font-size: 17px;
  line-height: 1.7;
  text-align: justify;
  margin-bottom: 20px;
}

.page-khuyen-mai__text-block--light {
  color: #f0f0f0;
}

.page-khuyen-mai__dark-bg {
  background-color: #017439;
  color: #FFFFFF;
}

.page-khuyen-mai__light-bg {
  background-color: #FFFFFF;
  color: #333333;
}

/* Hero Section */
.page-khuyen-mai__hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-top: 10px; /* Rely on body padding for header offset, use small top padding here */
  padding-bottom: 40px;
  overflow: hidden;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  max-height: 600px; /* Limit height for desktop */
  overflow: hidden;
  position: relative;
}

.page-khuyen-mai__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* Cover for desktop, will change to contain for mobile */
  display: block;
}

.page-khuyen-mai__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 20px 15px;
  max-width: 900px;
  margin-top: 20px;
}

.page-khuyen-mai__main-title {
  font-size: clamp(30px, 4.5vw, 52px); /* Responsive font size */
  font-weight: 800;
  color: #FFFF00; /* Custom color for H1 */
  margin-bottom: 15px;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

.page-khuyen-mai__subtitle {
  font-size: 19px;
  color: #f0f0f0;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Buttons */
.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  text-align: center;
  white-space: normal; /* Allow text to wrap */
  word-wrap: break-word; /* Allow long words to break */
  box-sizing: border-box;
}

.page-khuyen-mai__btn-primary {
  background-color: #C30808; /* Custom color for Register/Login */
  color: #FFFF00; /* Custom font color for Register/Login */
  border: 2px solid #C30808;
}

.page-khuyen-mai__btn-primary:hover {
  background-color: #e02020;
  border-color: #e02020;
}

.page-khuyen-mai__btn-secondary {
  background-color: #FFFFFF;
  color: #017439;
  border: 2px solid #017439;
}

.page-khuyen-mai__btn-secondary:hover {
  background-color: #f0f0f0;
  color: #005a2e;
}

.page-khuyen-mai__cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 30px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.page-khuyen-mai__btn-primary--large,
.page-khuyen-mai__btn-secondary--large {
  min-width: 220px;
  padding: 16px 35px;
  font-size: 20px;
}

/* Grid Layouts */
.page-khuyen-mai__grid {
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

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

.page-khuyen-mai__grid--3-col {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Card Styles */
.page-khuyen-mai__card {
  background-color: #ffffff;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: #333333;
}

.page-khuyen-mai__card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.page-khuyen-mai__card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
}

.page-khuyen-mai__card--promo img {
  height: 300px;
}

.page-khuyen-mai__card-title {
  font-size: 22px;
  font-weight: 700;
  color: #017439;
  margin: 20px 15px 10px;
  line-height: 1.3;
}

.page-khuyen-mai__card-description {
  font-size: 16px;
  color: #555555;
  padding: 0 15px 20px;
  flex-grow: 1;
}

.page-khuyen-mai__card--promo .page-khuyen-mai__btn-secondary {
  margin: 0 20px 20px;
}

/* Ordered List */
.page-khuyen-mai__ordered-list {
  list-style: decimal;
  padding-left: 25px;
  margin-bottom: 20px;
  font-size: 17px;
  line-height: 1.8;
}

.page-khuyen-mai__ordered-list li {
  margin-bottom: 10px;
  color: #f0f0f0;
}

.page-khuyen-mai__ordered-list li strong {
  color: #FFFF00;
}

/* Article Body for long text */
.page-khuyen-mai__article-body {
  max-width: 900px; /* Constrain width for readability */
  margin: 0 auto;
  padding: 30px 15px;
}

.page-khuyen-mai__article-body p {
  margin-bottom: 1.5em;
}

.page-khuyen-mai__article-body a {
  color: #017439;
  text-decoration: underline;
}

.page-khuyen-mai__article-body a:hover {
  color: #005a2e;
}

/* Call to Action Section */
.page-khuyen-mai__cta-section {
  padding: 60px 0;
  text-align: center;
}

.page-khuyen-mai__cta-content {
  max-width: 900px;
  margin: 0 auto;
}

.page-khuyen-mai__cta-title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-khuyen-mai__cta-title--light {
  color: #FFFF00; /* Custom color for CTA H2 */
}

.page-khuyen-mai__cta-description {
  font-size: 19px;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-khuyen-mai__cta-description--light {
  color: #f0f0f0;
}

/* FAQ Section */
details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid #e0e0e0;
  overflow: hidden;
  background: #fff;
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question::-webkit-details-marker {
  display: none;
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question:hover {
  background: #f5f5f5;
}
.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: #333333;
}
.page-khuyen-mai__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: #666;
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
  padding: 0 20px 20px;
  background: #f9f9f9;
  border-radius: 0 0 5px 5px;
  color: #555555;
}

/* Universal image responsive styles */
.page-khuyen-mai img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --- Responsive Styles --- */

/* @media (max-width: 1024px) for general adjustments */
@media (max-width: 1024px) {
  .page-khuyen-mai__section-title {
    font-size: 32px;
  }
  .page-khuyen-mai__main-title {
    font-size: clamp(28px, 4vw, 48px);
  }
  .page-khuyen-mai__subtitle {
    font-size: 18px;
  }
  .page-khuyen-mai__cta-title {
    font-size: 36px;
  }
  .page-khuyen-mai__cta-description {
    font-size: 18px;
  }
  .page-khuyen-mai__grid--2-col {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
  .page-khuyen-mai__grid--3-col {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

/* @media (max-width: 849px) for hero image contain */
@media (max-width: 849px) {
  .page-khuyen-mai__hero-image img {
    object-fit: contain !important; /* Prevent cropping on smaller screens */
    aspect-ratio: unset !important;
    height: auto !important;
    max-height: 400px; /* Adjust max height for mobile */
  }
}

/* @media (max-width: 768px) for mobile-specific styles */
@media (max-width: 768px) {
  .page-khuyen-mai__container,
  .page-khuyen-mai__section,
  .page-khuyen-mai__card,
  .page-khuyen-mai__cta-content,
  .page-khuyen-mai__faq-list {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  /* HERO 主图区域 */
  .page-khuyen-mai__hero-section {
    padding-top: 10px; /* Small top padding, body handles header offset */
    padding-bottom: 20px;
  }
  .page-khuyen-mai__hero-content {
    margin-top: 10px;
  }
  .page-khuyen-mai__main-title {
    font-size: clamp(26px, 8vw, 38px); /* Further adjust for smaller screens */
    margin-bottom: 10px;
  }
  .page-khuyen-mai__subtitle {
    font-size: 16px;
    margin-bottom: 20px;
  }

  /* Grid Layouts for mobile */
  .page-khuyen-mai__grid--2-col,
  .page-khuyen-mai__grid--3-col {
    grid-template-columns: 1fr; /* Single column on mobile */
    gap: 20px;
  }
  .page-khuyen-mai__card img {
    height: 200px; /* Adjust card image height for mobile */
  }
  .page-khuyen-mai__card--promo img {
    height: 250px;
  }
  .page-khuyen-mai__card-title {
    font-size: 20px;
    margin: 15px 10px 8px;
  }
  .page-khuyen-mai__card-description {
    font-size: 15px;
    padding: 0 10px 15px;
  }

  /* Buttons and Button Containers */
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .page-khuyen-mai a[class*="button"],
  .page-khuyen-mai a[class*="btn"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-khuyen-mai__cta-buttons,
  .page-khuyen-mai__button-group,
  .page-khuyen-mai__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-direction: column !important; /* Stack buttons vertically on mobile */
    gap: 10px;
  }
  .page-khuyen-mai__btn-primary--large,
  .page-khuyen-mai__btn-secondary--large {
    min-width: unset; /* Remove min-width for full flexibility */
  }

  /* Article Body for long text */
  .page-khuyen-mai__article-body {
    padding: 20px 15px;
  }

  /* CTA Section */
  .page-khuyen-mai__cta-section {
    padding: 40px 0;
  }
  .page-khuyen-mai__cta-title {
    font-size: 30px;
  }
  .page-khuyen-mai__cta-description {
    font-size: 16px;
  }

  /* FAQ Section */
  details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question { padding: 15px; }
  .page-khuyen-mai__faq-qtext { font-size: 15px; }
  .page-khuyen-mai__faq-toggle { font-size: 20px; width: 24px; margin-left: 10px; }
  details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer { padding: 0 15px 15px; }

  /* Universal image responsive styles (important for all images) */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  /* Section titles */
  .page-khuyen-mai__section-title {
    font-size: 28px;
    margin-bottom: 20px;
  }
  .page-khuyen-mai__text-block {
    font-size: 16px;
  }
  .page-khuyen-mai__ordered-list {
    font-size: 16px;
    padding-left: 20px;
  }
}