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

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

.page-khuyen-mai__hero-section {
  padding-top: 10px; /* Rely on body padding for header offset, add small top padding */
  padding-bottom: 40px;
  text-align: center;
  background-color: var(--color-bg-main);
  position: relative;
  overflow: hidden;
}

.page-khuyen-mai__hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 20px;
  line-height: 1.2;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

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

.page-khuyen-mai__cta-group {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  min-width: 180px;
  box-sizing: border-box;
}

.page-khuyen-mai__btn-primary {
  background: var(--btn-gradient);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 15px rgba(255, 176, 74, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 176, 74, 0.6);
}

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

.page-khuyen-mai__btn-secondary:hover {
  background-color: rgba(243, 197, 77, 0.1);
  color: var(--color-gold);
  transform: translateY(-2px);
}

.page-khuyen-mai__section {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  background-color: var(--color-bg-main);
}

.page-khuyen-mai__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--color-gold);
  margin-bottom: 25px;
  font-weight: 700;
  line-height: 1.3;
}

.page-khuyen-mai__section-intro {
  font-size: 1.05rem;
  color: var(--color-text-main);
  max-width: 800px;
  margin: 0 auto 40px auto;
  line-height: 1.7;
}

.page-khuyen-mai__promo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-khuyen-mai__promo-card {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  text-align: left;
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--color-border);
}

.page-khuyen-mai__card-img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--color-border);
}

.page-khuyen-mai__promo-card h3 {
  font-size: 1.5rem;
  color: var(--color-gold);
  padding: 20px 25px 10px;
  font-weight: 600;
  line-height: 1.4;
}

.page-khuyen-mai__promo-card p {
  font-size: 0.95rem;
  color: var(--color-text-main);
  padding: 0 25px 20px;
  flex-grow: 1;
  line-height: 1.6;
}

.page-khuyen-mai__promo-card .page-khuyen-mai__btn-primary {
  margin: 0 25px 25px;
  width: calc(100% - 50px);
  max-width: none;
}

.page-khuyen-mai__how-to-claim {
  background-color: var(--color-bg-main);
}

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

.page-khuyen-mai__step-item {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-khuyen-mai__step-number {
  width: 60px;
  height: 60px;
  background: var(--btn-gradient);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
  box-shadow: 0 3px 10px rgba(255, 176, 74, 0.3);
}

.page-khuyen-mai__step-title {
  font-size: 1.4rem;
  color: var(--color-gold);
  margin-bottom: 15px;
  font-weight: 600;
  line-height: 1.3;
}

.page-khuyen-mai__step-text {
  font-size: 1rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.page-khuyen-mai__step-text a {
  color: var(--color-gold);
  text-decoration: none;
  font-weight: 600;
}

.page-khuyen-mai__step-text a:hover {
  text-decoration: underline;
}

.page-khuyen-mai__cta-bottom {
  margin-top: 50px;
  display: flex;
  justify-content: center;
}

.page-khuyen-mai__terms-conditions {
  background-color: var(--color-deep-red);
  color: #ffffff;
  padding: 80px 20px;
}

.page-khuyen-mai__terms-conditions .page-khuyen-mai__section-title,
.page-khuyen-mai__terms-conditions .page-khuyen-mai__section-intro {
  color: #ffffff;
}

.page-khuyen-mai__terms-list {
  list-style: none;
  padding: 0;
  max-width: 900px;
  margin: 40px auto 0 auto;
  text-align: left;
}

.page-khuyen-mai__terms-list li {
  background-color: rgba(255, 255, 255, 0.08);
  margin-bottom: 15px;
  padding: 15px 20px;
  border-radius: 8px;
  font-size: 1rem;
  line-height: 1.7;
  border-left: 4px solid var(--color-gold);
}

.page-khuyen-mai__terms-conditions .page-khuyen-mai__btn-secondary {
  border-color: #ffffff;
  color: #ffffff;
  margin-top: 30px;
}

.page-khuyen-mai__terms-conditions .page-khuyen-mai__btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.page-khuyen-mai__why-choose {
  background-color: var(--color-bg-main);
}

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

.page-khuyen-mai__feature-item {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-khuyen-mai__feature-icon {
  width: 100px;
  height: 100px;
  object-fit: contain;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 5px rgba(243, 197, 77, 0.5));
}

.page-khuyen-mai__feature-title {
  font-size: 1.3rem;
  color: var(--color-gold);
  margin-bottom: 10px;
  font-weight: 600;
  line-height: 1.3;
}

.page-khuyen-mai__feature-text {
  font-size: 0.95rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.page-khuyen-mai__final-cta {
  padding-bottom: 80px;
  background-color: var(--color-bg-main);
}

/* --- Responsive Styles --- */

/* Desktop/Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-section {
    padding-bottom: 30px;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }

  .page-khuyen-mai__description {
    font-size: 1rem;
  }

  .page-khuyen-mai__section {
    padding: 50px 20px;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(1.6rem, 3.8vw, 2.5rem);
  }

  .page-khuyen-mai__section-intro {
    font-size: 1rem;
    margin-bottom: 30px;
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-list,
  .page-khuyen-mai__feature-grid {
    gap: 25px;
  }

  .page-khuyen-mai__card-img {
    height: 220px;
  }

  .page-khuyen-mai__promo-card h3 {
    font-size: 1.3rem;
    padding: 18px 20px 8px;
  }

  .page-khuyen-mai__promo-card p {
    font-size: 0.9rem;
    padding: 0 20px 18px;
  }

  .page-khuyen-mai__promo-card .page-khuyen-mai__btn-primary {
    margin: 0 20px 20px;
    width: calc(100% - 40px);
  }

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

  .page-khuyen-mai__step-number {
    width: 55px;
    height: 55px;
    font-size: 1.8rem;
    margin-bottom: 18px;
  }

  .page-khuyen-mai__step-title {
    font-size: 1.3rem;
  }

  .page-khuyen-mai__step-text {
    font-size: 0.95rem;
  }

  .page-khuyen-mai__terms-list li {
    padding: 12px 18px;
    font-size: 0.95rem;
  }

  .page-khuyen-mai__feature-item {
    padding: 25px;
  }

  .page-khuyen-mai__feature-icon {
    width: 90px;
    height: 90px;
  }

  .page-khuyen-mai__feature-title {
    font-size: 1.2rem;
  }

  .page-khuyen-mai__feature-text {
    font-size: 0.9rem;
  }

  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary {
    padding: 12px 25px;
    font-size: 1rem;
    min-width: 160px;
  }
}

/* Mobile (max-width: 768px) - MUST INCLUDE ALL MANDATORY BLOCKS */
@media (max-width: 768px) {
  /* 1. Top section title + CTAs */
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
    padding-bottom: 25px;
    padding-left: 15px;
    padding-right: 15px;
  }

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

  .page-khuyen-mai__main-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    margin-bottom: 15px;
  }

  .page-khuyen-mai__description {
    font-size: 0.95rem;
    margin-bottom: 25px;
  }

  .page-khuyen-mai__cta-group {
    flex-direction: column;
    gap: 10px;
  }

  /* 4. Buttons and button containers */
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .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-left: 15px;
    padding-right: 15px;
    min-width: unset;
  }

  .page-khuyen-mai__cta-bottom {
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-khuyen-mai__cta-bottom .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__cta-bottom .page-khuyen-mai__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
  }

  /* 2. Single column long text containers */
  .page-khuyen-mai__section {
    padding: 40px 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: 20px;
  }

  .page-khuyen-mai__section-intro {
    font-size: 0.9rem;
    margin-bottom: 25px;
    padding: 0 5px;
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-list,
  .page-khuyen-mai__feature-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-khuyen-mai__promo-card {
    margin-left: 5px;
    margin-right: 5px;
  }

  /* 3. Generic images and figure */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block;
  }

  .page-khuyen-mai__card-img {
    
  }

  .page-khuyen-mai__promo-card h3 {
    font-size: 1.2rem;
    padding: 15px 20px 8px;
  }

  .page-khuyen-mai__promo-card p {
    font-size: 0.85rem;
    padding: 0 20px 15px;
  }

  .page-khuyen-mai__promo-card .page-khuyen-mai__btn-primary {
    margin: 0 20px 20px;
    width: calc(100% - 40px);
  }

  .page-khuyen-mai__step-item {
    padding: 20px;
  }

  .page-khuyen-mai__step-number {
    width: 50px;
    height: 50px;
    font-size: 1.6rem;
    margin-bottom: 15px;
  }

  .page-khuyen-mai__step-title {
    font-size: 1.2rem;
  }

  .page-khuyen-mai__step-text {
    font-size: 0.9rem;
  }

  .page-khuyen-mai__terms-conditions {
    padding: 50px 15px;
  }

  .page-khuyen-mai__terms-list {
    margin-top: 25px;
  }

  .page-khuyen-mai__terms-list li {
    padding: 10px 15px;
    font-size: 0.9rem;
  }

  .page-khuyen-mai__feature-item {
    padding: 20px;
  }

  .page-khuyen-mai__feature-icon {
    width: 80px;
    height: 80px;
  }

  .page-khuyen-mai__feature-title {
    font-size: 1.1rem;
  }

  .page-khuyen-mai__feature-text {
    font-size: 0.85rem;
  }

  .page-khuyen-mai__final-cta {
    padding-bottom: 50px;
  }

  /* Ensure content containers are correctly sized on mobile */
  .page-khuyen-mai__section,
  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__step-item,
  .page-khuyen-mai__feature-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
}