.page-khuyen-mai {
  --primary-color: #C61F1F;
  --secondary-color: #E53030;
  --text-main-color: #FFF1E8;
  --card-bg-color: #2A1212;
  --body-bg-color: #140C0C;
  --button-gradient: linear-gradient(180deg, #FFB04A 0%, #D86A14 100%);
  --gold-color: #F3C54D;
  --deep-red-color: #7E0D0D;
  --border-color: #6A1E1E;

  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-main-color); /* Default text color for the page */
  background-color: var(--body-bg-color); /* This will be overridden by shared.css body background if it exists */
}

.page-khuyen-mai__hero-section {
  padding-top: 10px; /* Small top padding, assuming body handles --header-offset */
  background-color: var(--body-bg-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-khuyen-mai__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover; /* Ensures image covers the area, might crop edges */
}

.page-khuyen-mai__hero-content {
  padding: 40px 20px;
  max-width: 900px;
  margin: 0 auto;
  color: var(--text-main-color);
  z-index: 1;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.2em, 4vw, 3.2em); /* Responsive font size for H1 */
  font-weight: 700;
  color: var(--gold-color);
  margin-bottom: 15px;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-khuyen-mai__intro-text {
  font-size: 1.1em;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-main-color);
}

.page-khuyen-mai__cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  transition: all 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
  text-align: center;
}

.page-khuyen-mai__btn-primary {
  background: var(--button-gradient);
  color: #ffffff; /* Ensures contrast on gradient button */
  border: 2px solid transparent;
}

.page-khuyen-mai__btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 176, 74, 0.4);
}

.page-khuyen-mai__btn-secondary {
  background: var(--card-bg-color);
  color: var(--gold-color);
  border: 2px solid var(--gold-color);
}

.page-khuyen-mai__btn-secondary:hover {
  background: var(--gold-color);
  color: var(--card-bg-color);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(243, 197, 77, 0.3);
}

.page-khuyen-mai__section {
  padding: 60px 0;
  background-color: var(--body-bg-color);
  color: var(--text-main-color);
}

.page-khuyen-mai__section--gradient {
  background-image: linear-gradient(to bottom, var(--body-bg-color), var(--deep-red-color));
}

.page-khuyen-mai__dark-section {
  background-color: var(--deep-red-color);
  color: var(--text-main-color);
}

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

.page-khuyen-mai__section-title {
  font-size: 2.5em;
  font-weight: 700;
  color: var(--gold-color);
  text-align: center;
  margin-bottom: 40px;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__text-block {
  font-size: 1.1em;
  margin-bottom: 20px;
  text-align: justify;
  color: var(--text-main-color);
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--card-bg-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  text-align: center;
  padding-bottom: 25px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__promo-image {
  width: 100%;
  height: 200px; /* Fixed height for consistency */
  object-fit: cover;
  display: block;
  margin-bottom: 20px;
}

.page-khuyen-mai__promo-title {
  font-size: 1.6em;
  font-weight: 600;
  color: var(--gold-color);
  margin-bottom: 15px;
  padding: 0 15px;
}

.page-khuyen-mai__promo-description {
  font-size: 0.95em;
  color: var(--text-main-color);
  padding: 0 15px;
  margin-bottom: 25px;
  flex-grow: 1;
  text-align: left;
}

.page-khuyen-mai__promo-card .page-khuyen-mai__btn-primary {
  margin: 0 15px;
  padding: 12px 20px;
  font-size: 1em;
}

.page-khuyen-mai__guide-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-khuyen-mai__step-item {
  background-color: var(--card-bg-color);
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  padding: 30px;
  text-align: center;
  position: relative;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-khuyen-mai__step-number {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary-color);
  color: #ffffff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.8em;
  font-weight: bold;
  border: 3px solid var(--gold-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

.page-khuyen-mai__step-title {
  font-size: 1.8em;
  font-weight: 600;
  color: var(--gold-color);
  margin-top: 20px;
  margin-bottom: 15px;
}

.page-khuyen-mai__step-image {
  width: 100%;
  max-width: 300px;
  height: 200px;
  object-fit: contain;
  margin-bottom: 20px;
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.05);
  padding: 10px;
  box-sizing: border-box;
}

.page-khuyen-mai__step-description {
  font-size: 0.95em;
  color: var(--text-main-color);
  margin-bottom: 25px;
  text-align: left;
  flex-grow: 1;
}

.page-khuyen-mai__step-item .page-khuyen-mai__btn-secondary {
  padding: 12px 20px;
  font-size: 1em;
}

.page-khuyen-mai__content-image {
  width: 100%;
  max-width: 800px;
  height: auto;
  display: block;
  margin: 30px auto;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  object-fit: cover;
}

.page-khuyen-mai__terms-list {
  list-style: none;
  padding: 0;
  margin-top: 30px;
}

.page-khuyen-mai__terms-item {
  background-color: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 15px;
  font-size: 1em;
  color: var(--text-main-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__terms-item strong {
  color: var(--gold-color);
}

.page-khuyen-mai__faq-list {
  margin-top: 40px;
}

.page-khuyen-mai__faq-item {
  background-color: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  color: var(--text-main-color);
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  cursor: pointer;
  font-size: 1.1em;
  font-weight: 600;
  color: var(--gold-color);
  list-style: none; /* For details/summary */
}

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

.page-khuyen-mai__faq-toggle {
  font-size: 1.5em;
  font-weight: bold;
  color: var(--gold-color);
  margin-left: 10px;
}

.page-khuyen-mai__faq-answer {
  padding: 0 20px 20px 20px;
  font-size: 0.95em;
  color: var(--text-main-color);
}

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

.page-khuyen-mai__cta-section {
  text-align: center;
  padding-bottom: 80px;
}

/* --- Responsive Styles --- */
/* Generic image responsiveness */
.page-khuyen-mai img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* All containers for mobile */
.page-khuyen-mai__section,
.page-khuyen-mai__container,
.page-khuyen-mai__promo-grid,
.page-khuyen-mai__guide-steps,
.page-khuyen-mai__faq-list {
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

@media (max-width: 1024px) {
  .page-khuyen-mai__section-title {
    font-size: 2em;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(2em, 5vw, 2.8em);
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__guide-steps {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai {
    font-size: 16px;
    line-height: 1.6;
  }

  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
  }

  .page-khuyen-mai__hero-image {
    object-fit: contain; /* Ensure full image is visible, no cropping */
    aspect-ratio: unset;
    max-height: none;
  }

  .page-khuyen-mai__hero-content {
    padding: 30px 15px;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(1.8em, 7vw, 2.5em) !important;
  }

  .page-khuyen-mai__intro-text {
    font-size: 1em;
  }

  .page-khuyen-mai__cta-buttons {
    flex-direction: column;
    gap: 15px;
    padding: 0 15px;
  }

  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary {
    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__section {
    padding: 40px 0;
  }

  .page-khuyen-mai__container {
    padding: 0 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__section-title {
    font-size: 1.8em;
    margin-bottom: 30px;
  }

  .page-khuyen-mai__text-block {
    font-size: 0.95em;
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__guide-steps {
    grid-template-columns: 1fr; /* Single column layout for cards/steps */
    gap: 20px;
  }

  .page-khuyen-mai__promo-image {
    height: 180px;
  }

  .page-khuyen-mai__promo-title,
  .page-khuyen-mai__step-title {
    font-size: 1.4em;
  }

  .page-khuyen-mai__promo-description,
  .page-khuyen-mai__step-description {
    font-size: 0.9em;
  }

  .page-khuyen-mai__step-number {
    width: 40px;
    height: 40px;
    font-size: 1.5em;
    top: -15px;
    border-width: 2px;
  }

  .page-khuyen-mai__step-image {
    height: 150px;
    padding: 5px;
  }

  .page-khuyen-mai__content-image {
    margin: 20px auto;
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-khuyen-mai__terms-item {
    padding: 15px;
    font-size: 0.9em;
  }

  .page-khuyen-mai__faq-question {
    padding: 15px;
    font-size: 1em;
  }

  .page-khuyen-mai__faq-answer {
    padding: 0 15px 15px 15px;
    font-size: 0.9em;
  }

  /* General image responsiveness for all images */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  /* All containers for mobile */
  .page-khuyen-mai__section,
  .page-khuyen-mai__card,
  .page-khuyen-mai__container,
  .page-khuyen-mai__cta-buttons,
  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__guide-steps,
  .page-khuyen-mai__faq-list {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow-x: hidden;
  }
}