:root {
  --button-gradient: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  --card-bg-color: #D32F2F;
  --main-bg-color: #B71C1C;
  --text-main-color: #FFF5E1;
  --border-color: #F2B544;
  --glow-color: #FFCC66;
  --gold-color: #F4D34D;
  --deep-red-color: #7A0E0E;
  --primary-color: #C91F17;
  --secondary-color: #E53935;
}

.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-main-color);
  background-color: var(--main-bg-color);
}

.page-khuyen-mai__hero-section {
  padding-top: 10px; /* Small top padding, not var(--header-offset) */
  padding-bottom: 40px;
  background-color: var(--main-bg-color);
  color: var(--text-main-color);
}

.page-khuyen-mai__hero-container {
  max-width: 1170px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
  gap: 24px;
}

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

.page-khuyen-mai__main-title {
  font-size: clamp(2.2em, 4vw, 3.5em); /* Using clamp for H1 */
  font-weight: bold;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--gold-color);
}

.page-khuyen-mai__intro-description {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: var(--text-main-color);
}

.page-khuyen-mai__hero-image {
  flex: 1 1 40%;
  min-width: 250px;
  text-align: center;
}

.page-khuyen-mai__hero-side-image {
  max-width: 600px;
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 0 20px var(--glow-color);
}

.page-khuyen-mai__cta-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary,
.page-khuyen-mai__btn-details {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  white-space: normal;
  word-wrap: break-word;
  box-sizing: border-box;
  max-width: 100%;
}

.page-khuyen-mai__btn-primary {
  background: var(--button-gradient);
  color: #000; /* Dark text for contrast on gold gradient */
  border: 2px solid var(--border-color);
}

.page-khuyen-mai__btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 216, 106, 0.4);
}

.page-khuyen-mai__btn-secondary {
  background-color: transparent;
  color: var(--text-main-color);
  border: 2px solid var(--border-color);
}

.page-khuyen-mai__btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 255, 255, 0.1);
}

.page-khuyen-mai__btn-details {
  background: var(--button-gradient);
  color: #000;
  border: 2px solid var(--border-color);
  font-size: 0.9em;
  padding: 8px 15px;
}

.page-khuyen-mai__btn-details:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

/* General content area */
.page-khuyen-mai__content-area {
  max-width: 1170px;
  margin: 0 auto;
  padding: 40px 16px;
  color: var(--text-main-color);
}

.page-khuyen-mai__section-title {
  font-size: clamp(1.8em, 3.5vw, 2.8em);
  font-weight: bold;
  text-align: center;
  margin-bottom: 20px;
  color: var(--gold-color);
}

.page-khuyen-mai__section-description {
  font-size: 1.1em;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px auto;
  color: var(--text-main-color);
}

/* Promo List Section */
.page-khuyen-mai__promo-list-section {
  background-color: var(--deep-red-color);
  padding: 60px 0;
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--card-bg-color);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  color: var(--text-main-color);
  border: 1px solid var(--border-color);
}

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

.page-khuyen-mai__promo-card-title {
  font-size: 1.5em;
  font-weight: bold;
  padding: 15px 20px 10px;
  color: var(--gold-color);
}

.page-khuyen-mai__promo-card-text {
  padding: 0 20px 20px;
  flex-grow: 1;
  font-size: 0.95em;
}

.page-khuyen-mai__promo-card .page-khuyen-mai__btn-details {
  margin: 0 20px 20px;
  text-align: center;
}

/* Benefits Section */
.page-khuyen-mai__benefits-section {
  background-color: var(--main-bg-color);
  padding: 60px 0;
}

.page-khuyen-mai__benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  text-align: center;
}

.page-khuyen-mai__benefit-item {
  background-color: var(--card-bg-color);
  border-radius: 10px;
  padding: 30px 20px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  color: var(--text-main-color);
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__benefit-icon {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 20px;
  border: 3px solid var(--border-color);
  box-shadow: 0 0 10px var(--glow-color);
  display: block;
}

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

.page-khuyen-mai__benefit-text {
  font-size: 0.95em;
}

/* CTA Section */
.page-khuyen-mai__cta-section {
  background-color: var(--deep-red-color);
  padding: 60px 0;
  text-align: center;
}

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

.page-khuyen-mai__dark-section .page-khuyen-mai__section-description {
  color: var(--text-main-color);
}

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

.page-khuyen-mai__faq-items {
  max-width: 800px;
  margin: 0 auto;
}

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

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  font-size: 1.1em;
  font-weight: bold;
  cursor: pointer;
  background-color: var(--deep-red-color);
  color: var(--gold-color);
  list-style: none; /* Hide default marker for details summary */
}

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

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

.page-khuyen-mai__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  margin-left: 10px;
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
  content: "−"; /* Change toggle on open */
}

.page-khuyen-mai__faq-answer {
  padding: 15px 20px;
  font-size: 0.95em;
  color: var(--text-main-color);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.page-khuyen-mai__faq-answer p {
  margin: 0;
}

/* General image styling for content area */
.page-khuyen-mai img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Responsive styles for 1024px */
@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__cta-buttons {
    justify-content: center;
  }
}

/* Responsive styles for 768px (Mobile) */
@media (max-width: 768px) {
  /* HERO Section */
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
  }
  .page-khuyen-mai__main-title {
    font-size: 2.2em;
  }
  .page-khuyen-mai__intro-description {
    font-size: 1em;
  }
  .page-khuyen-mai__hero-container {
    padding: 20px 15px;
  }
  .page-khuyen-mai__hero-image {
    order: -1;
  }

  /* Promo List Section */
  .page-khuyen-mai__promo-list-section {
    padding: 40px 0;
  }
  .page-khuyen-mai__promo-cards {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-khuyen-mai__promo-card-image {
    height: 200px !important; /* Adjust height for mobile */
  }
  .page-khuyen-mai__promo-card-title {
    font-size: 1.3em;
  }
  .page-khuyen-mai__promo-card-text {
    font-size: 0.9em;
  }

  /* Benefits Section */
  .page-khuyen-mai__benefits-section {
    padding: 40px 0;
  }
  .page-khuyen-mai__benefits-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-khuyen-mai__benefit-icon {
    width: 120px !important;
    height: 120px !important;
  }
  .page-khuyen-mai__benefit-title {
    font-size: 1.2em;
  }
  .page-khuyen-mai__benefit-text {
    font-size: 0.9em;
  }

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

  /* FAQ Section */
  .page-khuyen-mai__faq-section {
    padding: 40px 0;
  }
  .page-khuyen-mai__faq-question {
    font-size: 1em;
    padding: 12px 15px;
  }
  .page-khuyen-mai__faq-answer {
    font-size: 0.85em;
    padding: 12px 15px;
  }

  /* General Images */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  
  /* All containers with images */
  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__benefit-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* General containers for mobile */
  .page-khuyen-mai__content-area,
  .page-khuyen-mai__hero-container,
  .page-khuyen-mai__promo-cards,
  .page-khuyen-mai__benefits-grid,
  .page-khuyen-mai__faq-items {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  /* Buttons for mobile */
  .page-khuyen-mai__cta-buttons {
    flex-direction: column;
    gap: 10px;
  }
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .page-khuyen-mai__btn-details {
    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;
    text-align: center;
  }
}