:root {
  --primary-color: #C61F1F;
  --secondary-color: #E53030;
  --button-gradient: linear-gradient(180deg, #FFB04A 0%, #D86A14 100%);
  --card-bg: #2A1212;
  --body-bg: #140C0C; /* Assuming body background is dark from shared.css */
  --text-main: #FFF1E8;
  --border-color: #6A1E1E;
  --gold-color: #F3C54D;
  --deep-red: #7E0D0D;
}

.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-main); /* Default text color for the page, assuming dark body background */
  background-color: var(--body-bg);
}

.page-khuyen-mai__container {
  max-width: 1170px;
  margin: 0 auto;
  padding: 40px 16px;
  box-sizing: border-box;
}

.page-khuyen-mai__section-title {
  font-size: 2.5em;
  color: var(--gold-color);
  text-align: center;
  margin-bottom: 20px;
  font-weight: bold;
  line-height: 1.2;
}

.page-khuyen-mai__section-description {
  font-size: 1.1em;
  color: var(--text-main);
  text-align: center;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section */
.page-khuyen-mai__hero-section {
  padding-top: 10px; /* Small top padding, relying on body for header offset */
  padding-bottom: 60px;
  background-color: var(--deep-red);
  position: relative;
  overflow: hidden;
}

.page-khuyen-mai__hero-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 40px;
  max-width: 1170px;
  margin: 0 auto;
  padding: 40px 16px;
}

.page-khuyen-mai__hero-content {
  flex: 1 1 50%;
  min-width: 300px;
  text-align: left;
  color: var(--text-main);
}

.page-khuyen-mai__hero-title {
  font-size: clamp(2em, 4vw, 3.2em);
  color: var(--gold-color);
  margin-bottom: 20px;
  font-weight: bold;
  line-height: 1.2;
}

.page-khuyen-mai__hero-description {
  font-size: 1.15em;
  margin-bottom: 30px;
  color: var(--text-main);
}

.page-khuyen-mai__hero-cta-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-block;
  text-align: center;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
  background: var(--button-gradient);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.page-khuyen-mai__btn-secondary {
  background: #ffffff;
  color: var(--deep-red);
  border: 2px solid var(--deep-red);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__btn-secondary:hover {
  background: var(--deep-red);
  color: #ffffff;
  transform: translateY(-2px);
}

.page-khuyen-mai__hero-image {
  flex: 1 1 40%;
  min-width: 300px;
  text-align: center;
}

.page-khuyen-mai__hero-side-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* Intro Section */
.page-khuyen-mai__intro-section {
  background-color: var(--body-bg);
  padding: 60px 0;
}

.page-khuyen-mai__icon-boxes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-khuyen-mai__icon-box {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__icon-box-media {
  width: 200px;
  height: 200px;
  aspect-ratio: 1 / 1;
  margin: 0 auto 20px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--gold-color);
}

.page-khuyen-mai__icon-box-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.page-khuyen-mai__icon-box-title {
  font-size: 1.5em;
  color: var(--gold-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-khuyen-mai__icon-box-text {
  color: var(--text-main);
  font-size: 0.95em;
}

/* Promo Section */
.page-khuyen-mai__promo-section {
  background-color: var(--body-bg);
  padding: 60px 0;
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
}

.page-khuyen-mai__promo-link-wrapper {
  text-decoration: none;
  color: inherit;
  display: block;
  height: 100%;
}

.page-khuyen-mai__promo-image {
  width: 100%;
  height: 250px; /* Fixed height for consistency */
  object-fit: cover;
  display: block;
}

.page-khuyen-mai__promo-content {
  padding: 25px;
}

.page-khuyen-mai__promo-title {
  font-size: 1.4em;
  color: var(--gold-color);
  margin-bottom: 10px;
  font-weight: bold;
  line-height: 1.3;
}

.page-khuyen-mai__promo-text {
  font-size: 0.95em;
  color: var(--text-main);
  margin-bottom: 15px;
}

.page-khuyen-mai__promo-date {
  font-size: 0.85em;
  color: #aaa;
  display: block;
  margin-bottom: 15px;
}

.page-khuyen-mai__btn-view-detail {
  display: inline-block;
  background: var(--button-gradient);
  color: #ffffff;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 0.9em;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.3s ease;
}

.page-khuyen-mai__btn-view-detail:hover {
  opacity: 0.9;
}

/* CTA Section */
.page-khuyen-mai__cta-section {
  background-color: var(--deep-red);
  padding: 80px 0;
  text-align: center;
}

.page-khuyen-mai__cta-section .page-khuyen-mai__section-title {
  color: var(--gold-color);
}

.page-khuyen-mai__cta-section .page-khuyen-mai__section-description {
  color: var(--text-main);
  margin-bottom: 30px;
}

/* FAQ Section */
.page-khuyen-mai__faq-section {
  background-color: var(--body-bg);
  padding: 60px 0;
}

.page-khuyen-mai__faq-list {
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-khuyen-mai__faq-item {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  font-size: 1.2em;
  font-weight: bold;
  color: var(--gold-color);
  cursor: pointer;
  list-style: none; /* Hide default marker */
}

.page-khuyen-mai__faq-question::-webkit-details-marker {
  display: none; /* Hide default marker for webkit */
}

.page-khuyen-mai__faq-qtext {
  flex-grow: 1;
}

.page-khuyen-mai__faq-toggle {
  font-size: 1.5em;
  margin-left: 15px;
  color: var(--gold-color);
}

.page-khuyen-mai__faq-answer {
  padding: 0 25px 20px;
  font-size: 1em;
  color: var(--text-main);
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-container {
    flex-direction: column;
    text-align: center;
  }

  .page-khuyen-mai__hero-content {
    text-align: center;
  }

  .page-khuyen-mai__hero-cta-buttons {
    justify-content: center;
  }

  .page-khuyen-mai__hero-image {
    order: -1; /* Move image above text on smaller screens */
  }
}

@media (max-width: 768px) {
  /* HERO Section */
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }

  .page-khuyen-mai__hero-container {
    padding: 20px 15px;
    gap: 20px;
  }

  .page-khuyen-mai__hero-title {
    font-size: 2.2em;
  }

  .page-khuyen-mai__hero-description {
    font-size: 1em;
  }

  .page-khuyen-mai__hero-cta-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
    padding: 12px 20px;
    font-size: 1em;
  }

  /* General content sections */
  .page-khuyen-mai__container,
  .page-khuyen-mai__section {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-khuyen-mai__section-title {
    font-size: 2em;
    margin-bottom: 15px;
  }

  .page-khuyen-mai__section-description {
    font-size: 0.95em;
    margin-bottom: 30px;
  }

  /* Module 1 - Intro Section */
  .page-khuyen-mai__intro-section {
    padding: 40px 0;
  }

  .page-khuyen-mai__icon-boxes {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-khuyen-mai__icon-box-media {
    width: 180px;
    height: 180px;
    margin-bottom: 15px;
  }

  .page-khuyen-mai__icon-box-title {
    font-size: 1.3em;
  }

  /* Promo Section */
  .page-khuyen-mai__promo-section {
    padding: 40px 0;
  }

  .page-khuyen-mai__promo-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-khuyen-mai__promo-image {
    height: 200px; /* Adjust height for mobile */
  }

  .page-khuyen-mai__promo-title {
    font-size: 1.2em;
  }

  .page-khuyen-mai__promo-text,
  .page-khuyen-mai__promo-date {
    font-size: 0.9em;
  }

  .page-khuyen-mai__btn-view-detail {
    padding: 8px 15px;
    font-size: 0.85em;
  }

  /* CTA Section */
  .page-khuyen-mai__cta-section {
    padding: 60px 0;
  }

  /* FAQ Section */
  .page-khuyen-mai__faq-section {
    padding: 40px 0;
  }

  .page-khuyen-mai__faq-question {
    padding: 15px 20px;
    font-size: 1.1em;
  }

  .page-khuyen-mai__faq-answer {
    padding: 0 20px 15px;
    font-size: 0.95em;
  }

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

  /* Specific exception for circular images in intro section */
  .page-khuyen-mai__icon-box-media img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
  }

  /* Button and button container responsive styles */
  .page-khuyen-mai__hero-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-wrap: wrap !important;
    gap: 10px;
    flex-direction: column !important; /* Ensure vertical stacking for multiple buttons */
  }
}