/* Base styles for the Khuyến Mãi page */
.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #F3F8FF; /* Text Main */
  background-color: #08162B; /* Deep Navy - Body BG */
}

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

/* Hero Section */
.page-khuyen-mai__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 10px; /* Small top padding, not --header-offset */
  padding-bottom: 60px;
  overflow: hidden;
}

.page-khuyen-mai__hero-image-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: brightness(0.6);
}

.page-khuyen-mai__hero-content {
  position: absolute;
  z-index: 1;
  max-width: 900px;
  padding: 20px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.4); /* Dark overlay for text readability */
  border-radius: 10px;
}

.page-khuyen-mai__hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: #F3F8FF;
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-khuyen-mai__hero-description {
  font-size: 1.25rem;
  color: #AFC4E8;
  margin-bottom: 30px;
}

.page-khuyen-mai__cta-button {
  display: inline-block;
  padding: 15px 30px;
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%); /* Button */
  color: #ffffff;
  text-decoration: none;
  border-radius: 50px;
  font-weight: bold;
  font-size: 1.1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

/* General Section Styles */
.page-khuyen-mai__intro-section,
.page-khuyen-mai__promo-types-section,
.page-khuyen-mai__terms-section,
.page-khuyen-mai__guide-section,
.page-khuyen-mai__faq-section,
.page-khuyen-mai__conclusion-section {
  padding: 60px 0;
}

.page-khuyen-mai__section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: #F2C14E; /* Gold */
  text-align: center;
  margin-bottom: 40px;
  font-weight: 700;
}

.page-khuyen-mai__text-block {
  font-size: 1.1rem;
  color: #AFC4E8;
  margin-bottom: 20px;
  text-align: justify;
}

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

.page-khuyen-mai__promo-card {
  background: #10233F; /* Card BG */
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
  border: 1px solid #244D84; /* Border */
}

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

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

.page-khuyen-mai__card-content {
  padding: 25px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: calc(100% - 250px); /* Adjust height based on image */
}

.page-khuyen-mai__card-title {
  font-size: 1.5rem;
  color: #F3F8FF;
  margin-bottom: 15px;
  font-weight: 600;
  line-height: 1.3;
}

.page-khuyen-mai__card-description {
  font-size: 1rem;
  color: #AFC4E8;
  margin-bottom: 20px;
  flex-grow: 1;
}

.page-khuyen-mai__card-button {
  display: inline-block;
  padding: 12px 25px;
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%); /* Button */
  color: #ffffff;
  text-decoration: none;
  border-radius: 30px;
  font-weight: bold;
  font-size: 0.95rem;
  text-align: center;
  transition: background 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__card-button:hover {
  background: linear-gradient(180deg, #1144A6 0%, #2B73F6 100%);
}

/* Terms & Guide Sections */
.page-khuyen-mai__terms-list,
.page-khuyen-mai__guide-list {
  list-style: none;
  padding: 0;
  margin-bottom: 30px;
}

.page-khuyen-mai__terms-item,
.page-khuyen-mai__guide-item {
  background: #10233F; /* Card BG */
  border: 1px solid #244D84; /* Border */
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 15px;
  font-size: 1.05rem;
  color: #AFC4E8;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__terms-item strong,
.page-khuyen-mai__guide-item strong {
  color: #F3F8FF;
}

.page-khuyen-mai__text-link {
  color: #4FA8FF; /* Glow */
  text-decoration: none;
  font-weight: bold;
}

.page-khuyen-mai__text-link:hover {
  text-decoration: underline;
}

.page-khuyen-mai__guide-cta-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.page-khuyen-mai__cta-button--primary {
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%); /* Button */
}

.page-khuyen-mai__cta-button--secondary {
  background: #1D5FD1; /* Auxiliary */
  border: 2px solid #1D5FD1;
}

.page-khuyen-mai__cta-button--secondary:hover {
  background: transparent;
  border-color: #4FA8FF;
  color: #4FA8FF;
}

.page-khuyen-mai__cta-button--gold {
  background: #F2C14E; /* Gold */
  color: #08162B;
  box-shadow: 0 5px 15px rgba(242, 193, 78, 0.4);
}

.page-khuyen-mai__cta-button--gold:hover {
  background: #e0b03e;
  box-shadow: 0 8px 20px rgba(242, 193, 78, 0.6);
}

/* FAQ Section */
details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid #244D84; /* Border */
  overflow: hidden;
  background: #10233F; /* Card BG */
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
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: rgba(36, 77, 132, 0.5); /* Lighter Border color on hover */
}
.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: #F3F8FF;
}
.page-khuyen-mai__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: #F2C14E; /* Gold */
  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: rgba(16, 35, 63, 0.8); /* Slightly lighter than Card BG */
  border-radius: 0 0 5px 5px;
  color: #AFC4E8;
}

/* Conclusion Section */
.page-khuyen-mai__conclusion-section .page-khuyen-mai__cta-button {
  margin-top: 30px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-title {
    font-size: clamp(2rem, 4vw, 3rem);
  }
  .page-khuyen-mai__hero-description {
    font-size: 1.1rem;
  }
  .page-khuyen-mai__section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  }
  .page-khuyen-mai__text-block {
    font-size: 1rem;
  }
  .page-khuyen-mai__promo-image {
    height: 200px;
  }
  .page-khuyen-mai__card-content {
    height: calc(100% - 200px);
  }
  .page-khuyen-mai__card-title {
    font-size: 1.3rem;
  }
  .page-khuyen-mai__card-description {
    font-size: 0.95rem;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }
  .page-khuyen-mai__hero-content {
    width: 90%;
    padding: 15px;
  }
  .page-khuyen-mai__hero-title {
    font-size: clamp(1.8rem, 6vw, 2.5rem) !important;
    margin-bottom: 15px;
  }
  .page-khuyen-mai__hero-description {
    font-size: 1rem !important;
    margin-bottom: 20px;
  }
  .page-khuyen-mai__cta-button {
    padding: 12px 20px !important;
    font-size: 1rem !important;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-khuyen-mai__intro-section,
  .page-khuyen-mai__promo-types-section,
  .page-khuyen-mai__terms-section,
  .page-khuyen-mai__guide-section,
  .page-khuyen-mai__faq-section,
  .page-khuyen-mai__conclusion-section {
    padding: 40px 0 !important;
  }
  .page-khuyen-mai__container {
    padding: 0 15px !important;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(1.5rem, 5vw, 2rem) !important;
    margin-bottom: 30px;
  }
  .page-khuyen-mai__text-block {
    font-size: 0.95rem !important;
  }

  .page-khuyen-mai__promo-grid {
    grid-template-columns: 1fr !important;
    gap: 20px;
  }
  .page-khuyen-mai__promo-image {
    height: 180px !important;
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__card-content {
    height: auto !important;
    padding: 20px;
  }
  .page-khuyen-mai__card-title {
    font-size: 1.2rem !important;
  }
  .page-khuyen-mai__card-description {
    font-size: 0.9rem !important;
  }
  .page-khuyen-mai__card-button {
    padding: 10px 20px !important;
    font-size: 0.9rem !important;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-khuyen-mai__terms-item,
  .page-khuyen-mai__guide-item {
    padding: 15px !important;
    font-size: 0.95rem !important;
  }
  .page-khuyen-mai__guide-cta-group {
    flex-direction: column !important;
    gap: 15px !important;
    margin-top: 30px;
  }
  .page-khuyen-mai__guide-cta-group .page-khuyen-mai__cta-button {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px !important;
    padding-right: 15px !important;
  }

  details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
    padding: 15px !important;
  }
  .page-khuyen-mai__faq-qtext {
    font-size: 1rem !important;
  }
  .page-khuyen-mai__faq-toggle {
    font-size: 20px !important;
    width: 24px !important;
    height: 24px !important;
    margin-left: 10px !important;
  }
  details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
    padding: 0 15px 15px !important;
  }

  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__section,
  .page-khuyen-mai__card,
  .page-khuyen-mai__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
}