.page-khuyen-mai {
  --primary-color: #113B7A;
  --secondary-color: #1D5FD1;
  --text-main-color: #F3F8FF;
  --text-secondary-color: #AFC4E8;
  --card-bg-color: #10233F;
  --border-color: #244D84;
  --glow-color: #4FA8FF;
  --gold-color: #F2C14E;
  --divider-color: #1B3357;
  --deep-navy-color: #08162B;
  --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);

  color: var(--text-main-color); /* Body background is dark, so text is light */
  background-color: var(--deep-navy-color); /* Inherited from shared.css body, for local context */
}

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

.page-khuyen-mai__section {
  padding: 60px 0;
  position: relative;
  z-index: 1;
}

.page-khuyen-mai__section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: var(--gold-color);
  line-height: 1.2;
  text-shadow: 0 0 10px rgba(79, 168, 255, 0.5);
}

.page-khuyen-mai__paragraph {
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 20px;
  text-align: justify;
  color: var(--text-secondary-color);
}

.page-khuyen-mai__highlight {
  color: var(--gold-color);
  font-weight: 600;
}

.page-khuyen-mai__inline-link {
  color: var(--glow-color);
  text-decoration: none;
  font-weight: 600;
}

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

/* Hero Section */
.page-khuyen-mai__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 500px;
  padding-top: 10px; /* Small top padding, relying on body for header offset */
  padding-bottom: 60px;
  overflow: hidden;
  background-color: var(--primary-color);
}

.page-khuyen-mai__hero-image-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.5);
}

.page-khuyen-mai__hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  padding: 20px;
}

.page-khuyen-mai__main-title {
  font-size: clamp(36px, 6vw, 60px);
  font-weight: 800;
  color: var(--gold-color);
  margin-bottom: 20px;
  line-height: 1.1;
  text-shadow: 0 0 15px rgba(79, 168, 255, 0.7);
}

.page-khuyen-mai__intro-text {
  font-size: clamp(18px, 2.5vw, 24px);
  color: var(--text-main-color);
  margin-bottom: 40px;
  line-height: 1.6;
}

.page-khuyen-mai__cta-button {
  display: inline-block;
  padding: 16px 32px;
  background: var(--button-gradient);
  color: var(--text-main-color);
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  border: none;
  cursor: pointer;
  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);
}

.page-khuyen-mai__cta-button--large {
  padding: 20px 40px;
  font-size: 24px;
  margin-top: 30px;
}

/* Promo Types Section */
.page-khuyen-mai__section--promo-types {
  background-color: var(--deep-navy-color);
}

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

.page-khuyen-mai__promo-card {
  background: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: var(--text-secondary-color);
  height: 100%;
  box-sizing: border-box;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__card-image {
  width: 100%;
  max-width: 400px;
  height: 250px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 25px;
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__card-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--gold-color);
  margin-bottom: 15px;
  line-height: 1.3;
}

.page-khuyen-mai__card-text {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 25px;
  flex-grow: 1;
}

.page-khuyen-mai__card-link-text {
  color: var(--glow-color);
  text-decoration: none;
  font-weight: 600;
}

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

.page-khuyen-mai__card-button {
  display: inline-block;
  padding: 12px 25px;
  background: var(--button-gradient);
  color: var(--text-main-color);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 6px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__card-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

/* Terms Section */
.page-khuyen-mai__section--terms {
  background-color: var(--deep-navy-color);
  border-top: 1px solid var(--divider-color);
}

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

.page-khuyen-mai__terms-item {
  background: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px 25px;
  margin-bottom: 15px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.page-khuyen-mai__terms-item strong {
  color: var(--gold-color);
  font-weight: 700;
}

/* How to Join Section */
.page-khuyen-mai__section--how-to-join {
  background-color: var(--deep-navy-color);
  border-top: 1px solid var(--divider-color);
}

.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-card {
  background: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-secondary-color);
  height: 100%;
  box-sizing: border-box;
}

.page-khuyen-mai__step-icon {
  width: 60px;
  height: 60px;
  background: var(--button-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main-color);
  margin-bottom: 20px;
  box-shadow: 0 0 15px rgba(43, 115, 246, 0.5);
}

.page-khuyen-mai__step-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--gold-color);
  margin-bottom: 15px;
}

.page-khuyen-mai__step-text {
  font-size: 16px;
  line-height: 1.7;
}

.page-khuyen-mai__cta-wrapper {
  text-align: center;
  margin-top: 50px;
}

/* Benefits Section */
.page-khuyen-mai__section--benefits {
  background-color: var(--deep-navy-color);
  border-top: 1px solid var(--divider-color);
}

.page-khuyen-mai__benefits-list {
  list-style: none;
  padding: 0;
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-khuyen-mai__benefits-item {
  display: flex;
  align-items: flex-start;
  background: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
  color: var(--text-secondary-color);
}

.page-khuyen-mai__benefits-icon {
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 8px;
  margin-right: 25px;
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__benefits-content {
  flex-grow: 1;
}

.page-khuyen-mai__benefits-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--gold-color);
  margin-top: 0;
  margin-bottom: 10px;
}

.page-khuyen-mai__benefits-text {
  font-size: 16px;
  line-height: 1.7;
}

/* FAQ Section */
.page-khuyen-mai__section--faq {
  background-color: var(--deep-navy-color);
  border-top: 1px solid var(--divider-color);
}

.page-khuyen-mai__faq-list {
  max-width: 900px;
  margin: 0 auto;
  margin-top: 40px;
}

details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  background: var(--card-bg-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--text-main-color);
}

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(29, 95, 209, 0.1);
}

.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--gold-color);
}

.page-khuyen-mai__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  color: var(--glow-color);
  flex-shrink: 0;
  margin-left: 15px;
  width: 30px;
  text-align: center;
}

details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
  padding: 0 25px 25px;
  background: var(--deep-navy-color);
  border-radius: 0 0 10px 10px;
  color: var(--text-secondary-color);
  font-size: 16px;
  line-height: 1.7;
}

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

/* Conclusion Section */
.page-khuyen-mai__section--conclusion {
  background-color: var(--primary-color);
  border-top: 1px solid var(--divider-color);
  text-align: center;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-content {
    max-width: 700px;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(32px, 5vw, 50px);
  }

  .page-khuyen-mai__intro-text {
    font-size: clamp(16px, 2vw, 20px);
  }

  .page-khuyen-mai__cta-button {
    font-size: 18px;
    padding: 14px 28px;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(26px, 3.5vw, 38px);
  }

  .page-khuyen-mai__paragraph {
    font-size: 16px;
  }

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

  .page-khuyen-mai__card-title {
    font-size: 22px;
  }

  .page-khuyen-mai__card-text {
    font-size: 15px;
  }

  .page-khuyen-mai__step-card {
    padding: 25px;
  }

  .page-khuyen-mai__step-title {
    font-size: 20px;
  }

  .page-khuyen-mai__benefits-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .page-khuyen-mai__benefits-icon {
    margin-right: 0;
    margin-bottom: 20px;
  }

  .page-khuyen-mai__benefits-title {
    font-size: 20px;
  }

  .page-khuyen-mai__faq-qtext {
    font-size: 17px;
  }

  .page-khuyen-mai__faq-answer {
    font-size: 15px;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai__container {
    padding: 0 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__section {
    padding: 40px 0 !important;
  }

  .page-khuyen-mai__hero-section {
    padding-top: 10px !important; /* Keep small top padding */
    padding-bottom: 40px !important;
    min-height: 400px !important;
  }

  .page-khuyen-mai__hero-image {
    object-fit: contain !important; /* Prevent cropping on mobile */
    aspect-ratio: unset !important;
    position: relative !important; /* Adjust for contain */
    filter: brightness(0.6) !important; /* Slightly brighter for text contrast */
  }

  .page-khuyen-mai__hero-image-wrapper {
    position: relative !important;
    height: 200px !important; /* Adjust height for contain */
    margin-bottom: 20px;
  }

  .page-khuyen-mai__hero-content {
    padding: 0 !important;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(28px, 8vw, 40px) !important;
    margin-bottom: 15px !important;
  }

  .page-khuyen-mai__intro-text {
    font-size: clamp(15px, 3.5vw, 18px) !important;
    margin-bottom: 30px !important;
  }

  .page-khuyen-mai__cta-button,
  .page-khuyen-mai__card-button,
  .page-khuyen-mai a[class*="button"],
  .page-khuyen-mai a[class*="btn"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding: 12px 20px !important;
    font-size: 16px !important;
  }

  .page-khuyen-mai__cta-button--large {
    padding: 16px 30px !important;
    font-size: 20px !important;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(22px, 6vw, 30px) !important;
    margin-bottom: 30px !important;
  }

  .page-khuyen-mai__paragraph {
    font-size: 15px !important;
  }

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

  .page-khuyen-mai__promo-card {
    padding: 20px !important;
  }

  .page-khuyen-mai__card-image {
    height: 200px !important;
    margin-bottom: 20px !important;
  }

  .page-khuyen-mai__card-title {
    font-size: 20px !important;
    margin-bottom: 10px !important;
  }

  .page-khuyen-mai__card-text {
    font-size: 14px !important;
  }

  .page-khuyen-mai__terms-item {
    padding: 15px 20px !important;
    font-size: 15px !important;
  }

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

  .page-khuyen-mai__step-card {
    padding: 20px !important;
  }

  .page-khuyen-mai__step-icon {
    width: 50px !important;
    height: 50px !important;
    font-size: 24px !important;
    margin-bottom: 15px !important;
  }

  .page-khuyen-mai__step-title {
    font-size: 18px !important;
  }

  .page-khuyen-mai__step-text {
    font-size: 14px !important;
  }

  .page-khuyen-mai__benefits-list {
    margin-top: 30px !important;
    gap: 20px !important;
  }

  .page-khuyen-mai__benefits-item {
    padding: 20px !important;
  }

  .page-khuyen-mai__benefits-icon {
    width: 80px !important;
    height: 80px !important;
    margin-bottom: 15px !important;
  }

  .page-khuyen-mai__benefits-title {
    font-size: 18px !important;
  }

  .page-khuyen-mai__benefits-text {
    font-size: 14px !important;
  }

  details.page-khuyen-mai__faq-item {
    margin-bottom: 10px !important;
    border-radius: 8px !important;
  }

  details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
    padding: 15px 20px !important;
  }

  .page-khuyen-mai__faq-qtext {
    font-size: 16px !important;
  }

  .page-khuyen-mai__faq-toggle {
    font-size: 24px !important;
    width: 25px !important;
  }

  details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
    padding: 0 20px 20px !important;
    font-size: 14px !important;
  }

  /* General image and container rules for mobile */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  .page-khuyen-mai__section,
  .page-khuyen-mai__card,
  .page-khuyen-mai__container,
  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__step-card,
  .page-khuyen-mai__benefits-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .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: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
    display: flex;
    flex-direction: column; /* Ensure vertical stacking for multiple buttons */
  }
}