.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #F3F8FF; /* Text Main */
  background-color: var(--color-deep-navy); /* Body background from shared.css */
}

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

/* HERO Section */
.page-khuyen-mai__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #F3F8FF;
  padding-top: 10px; /* Small top padding, body handles --header-offset */
  padding-bottom: 40px;
  overflow: hidden;
}

.page-khuyen-mai__hero-image-wrapper {
  position: relative;
  width: 100%;
  height: 500px; /* Default height */
  margin-bottom: 20px;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover; /* Default cover for desktop */
  display: block;
}

.page-khuyen-mai__hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 20px;
}

.page-khuyen-mai__hero-title {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 15px;
  line-height: 1.2;
  color: #F3F8FF;
}

.page-khuyen-mai__hero-description {
  font-size: 1.15rem;
  margin-bottom: 30px;
  color: #AFC4E8; /* Text Secondary */
}

.page-khuyen-mai__cta-button {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__cta-button--primary {
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  color: #ffffff;
  border: none;
}

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

.page-khuyen-mai__cta-button--secondary {
  background: #10233F; /* Card BG */
  color: #F3F8FF; /* Text Main */
  border: 1px solid #244D84; /* Border */
}

.page-khuyen-mai__cta-button--secondary:hover {
  background: #1B3357; /* Divider */
  transform: translateY(-2px);
}

.page-khuyen-mai__cta-button--small {
  padding: 10px 20px;
  font-size: 1rem;
}

/* General Sections */
.page-khuyen-mai__introduction-section,
.page-khuyen-mai__how-to-claim-section,
.page-khuyen-mai__why-choose-section,
.page-khuyen-mai__conclusion-section {
  padding: 60px 0;
  text-align: center;
}

.page-khuyen-mai__dark-section {
  background-color: #08162B; /* Deep Navy */
  color: #F3F8FF;
}

.page-khuyen-mai__section-title {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 40px;
  color: #F3F8FF; /* Text Main */
}

.page-khuyen-mai__section-title--dark-text {
  color: #F3F8FF; /* Text Main for light backgrounds */
}

.page-khuyen-mai__text-block {
  max-width: 900px;
  margin: 0 auto 20px;
  font-size: 1.05rem;
  color: #AFC4E8; /* Text Secondary */
}

/* Promotion Categories */
.page-khuyen-mai__promotion-categories,
.page-khuyen-mai__tips-section,
.page-khuyen-mai__faq-section {
  padding: 60px 0;
}

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

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

.page-khuyen-mai__card {
  background-color: #10233F; /* Card BG */
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  text-align: left;
  display: flex;
  flex-direction: column;
  color: #F3F8FF;
  border: 1px solid #244D84; /* Border */
}

.page-khuyen-mai__light-bg {
  background-color: #08162B; /* Deep Navy for consistency with dark theme */
  color: #F3F8FF;
  border: 1px solid #244D84;
}

.page-khuyen-mai__card-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.page-khuyen-mai__card-content {
  padding: 25px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.page-khuyen-mai__card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #F2C14E; /* Gold */
}

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

/* How to Claim Steps */
.page-khuyen-mai__steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-khuyen-mai__step-item {
  background-color: #10233F; /* Card BG */
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
  border: 1px solid #244D84; /* Border */
}

.page-khuyen-mai__step-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0 auto 20px;
  box-shadow: 0 0 15px #4FA8FF; /* Glow */
}

.page-khuyen-mai__step-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #F2C14E; /* Gold */
}

.page-khuyen-mai__step-description {
  font-size: 0.95rem;
  color: #AFC4E8; /* Text Secondary */
  margin-bottom: 20px;
}

/* Why Choose Section */
.page-khuyen-mai__reason-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-khuyen-mai__reason-item {
  background-color: #10233F; /* Card BG */
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
  border: 1px solid #244D84; /* Border */
}

.page-khuyen-mai__reason-icon {
  width: 60px;
  height: 60px;
  margin-bottom: 20px;
  display: block;
  margin-left: auto;
  margin-right: auto;
  object-fit: contain; /* Ensure icons are not cropped */
  max-width: 100%;
  height: auto;
}

.page-khuyen-mai__reason-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: #F2C14E; /* Gold */
}

.page-khuyen-mai__reason-description {
  font-size: 0.95rem;
  color: #AFC4E8; /* Text Secondary */
}

/* FAQ Section */
.page-khuyen-mai__faq-list {
  margin-top: 30px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 12px;
  border: 1px solid #244D84; /* Border */
  overflow: hidden;
  background: #10233F; /* Card BG */
  color: #F3F8FF;
}

details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  font-weight: 600;
  font-size: 1.1rem;
  color: #F2C14E; /* Gold */
}

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: #1B3357; /* Divider */
}

.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: #F2C14E; /* Gold */
}

.page-khuyen-mai__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: #4FA8FF; /* Glow */
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}

details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
  padding: 0 25px 25px;
  background: #08162B; /* Deep Navy */
  border-radius: 0 0 12px 12px;
  color: #AFC4E8; /* Text Secondary */
  font-size: 1rem;
}

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

/* Conclusion Section - uses dark-section styles */

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-image-wrapper {
    height: 400px;
  }
  .page-khuyen-mai__hero-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }
  .page-khuyen-mai__hero-description {
    font-size: 1rem;
  }
  .page-khuyen-mai__grid-layout--two-cols {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
  .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__faq-qtext {
    font-size: 1rem;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai__container {
    padding: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* HERO Section */
  .page-khuyen-mai__hero-section {
    padding-top: 10px;
    padding-bottom: 30px;
  }
  .page-khuyen-mai__hero-image-wrapper {
    height: 250px;
  }
  .page-khuyen-mai__hero-image {
    object-fit: contain !important; /* HERO main image object-fit:contain */
    aspect-ratio: unset !important;
  }
  .page-khuyen-mai__hero-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    margin-bottom: 10px;
  }
  .page-khuyen-mai__hero-description {
    font-size: 0.95rem;
    margin-bottom: 20px;
  }
  .page-khuyen-mai__cta-button {
    padding: 12px 20px;
    font-size: 1rem;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* General Sections */
  .page-khuyen-mai__introduction-section,
  .page-khuyen-mai__how-to-claim-section,
  .page-khuyen-mai__why-choose-section,
  .page-khuyen-mai__conclusion-section,
  .page-khuyen-mai__promotion-categories,
  .page-khuyen-mai__tips-section,
  .page-khuyen-mai__faq-section {
    padding: 40px 0;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(1.5rem, 6vw, 2.2rem);
    margin-bottom: 25px;
  }
  .page-khuyen-mai__text-block {
    font-size: 0.9rem;
  }

  /* Grid Layouts */
  .page-khuyen-mai__grid-layout,
  .page-khuyen-mai__grid-layout--two-cols,
  .page-khuyen-mai__steps-grid,
  .page-khuyen-mai__reason-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 20px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow-x: hidden; /* Prevent horizontal scroll */
  }

  /* Cards */
  .page-khuyen-mai__card {
    margin: 0 auto;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-khuyen-mai__card-image {
    height: 180px;
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__card-content {
    padding: 20px;
  }
  .page-khuyen-mai__card-title {
    font-size: 1.3rem;
  }
  .page-khuyen-mai__card-description {
    font-size: 0.9rem;
  }

  /* Steps & Reasons */
  .page-khuyen-mai__step-item,
  .page-khuyen-mai__reason-item {
    padding: 25px;
  }
  .page-khuyen-mai__step-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    margin-bottom: 15px;
  }
  .page-khuyen-mai__step-title {
    font-size: 1.2rem;
  }
  .page-khuyen-mai__step-description {
    font-size: 0.85rem;
  }
  .page-khuyen-mai__reason-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 15px;
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__reason-title {
    font-size: 1.1rem;
  }

  /* FAQ */
  details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
    padding: 15px;
  }
  .page-khuyen-mai__faq-qtext {
    font-size: 0.95rem;
  }
  .page-khuyen-mai__faq-toggle {
    font-size: 20px;
    width: 24px;
    height: 24px;
  }
  details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
    padding: 0 15px 15px;
    font-size: 0.9rem;
  }

  /* All images */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  /* Buttons in containers */
  .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: 0;
    padding-right: 0;
    flex-wrap: wrap !important;
    gap: 10px;
    display: flex;
    flex-direction: column; /* Ensure vertical stacking for groups */
  }
}