/* style/khuyen-mai.css */
:root {
  --primary-color: #E53935;
  --secondary-color: #FF5A4F;
  --text-main-color: #333333;
  --card-bg-color: #FFFFFF;
  --background-page-color: #F5F7FA;
  --border-color: #E0E0E0;
  --button-gradient: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%);
}

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

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

.page-khuyen-mai__hero-image-wrapper {
  width: 100%;
  max-height: 500px;
  overflow: hidden;
  position: relative;
  z-index: 0;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: brightness(0.7); /* Slightly dim the image for text contrast */
}

.page-khuyen-mai__hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 900px;
  padding: 20px;
  z-index: 1;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 15px;
  line-height: 1.2;
  color: #ffffff;
}

.page-khuyen-mai__hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: #f0f0f0;
}

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

.page-khuyen-mai__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
  background: var(--button-gradient);
  color: #ffffff;
  border: 2px solid var(--secondary-color);
}

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

.page-khuyen-mai__btn-secondary {
  background: #ffffff;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.page-khuyen-mai__btn-secondary:hover {
  background: var(--primary-color);
  color: #ffffff;
  transform: translateY(-2px);
}

.page-khuyen-mai__btn-small {
  padding: 8px 18px;
  font-size: 0.9rem;
  border-radius: 6px;
}

.page-khuyen-mai__article-wrap {
  max-width: 1150px;
  margin: 0 auto;
  padding: 40px 20px;
  background-color: var(--background-page-color);
  color: var(--text-main-color);
}

.page-khuyen-mai__content-area {
  background-color: var(--card-bg-color);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.page-khuyen-mai__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--primary-color);
  margin-top: 40px;
  margin-bottom: 25px;
  text-align: center;
}

.page-khuyen-mai h3 {
  font-size: clamp(1.4rem, 2.8vw, 1.8rem);
  font-weight: 600;
  color: var(--text-main-color);
  margin-top: 30px;
  margin-bottom: 15px;
}

.page-khuyen-mai p {
  margin-bottom: 15px;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-main-color);
}

.page-khuyen-mai__list {
  list-style: disc;
  margin-left: 25px;
  margin-bottom: 20px;
  color: var(--text-main-color);
}

.page-khuyen-mai__list li {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.page-khuyen-mai__figure {
  margin: 30px auto;
  text-align: center;
  max-width: 680px;
}

.page-khuyen-mai__image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
}

.page-khuyen-mai__figcaption {
  font-size: 0.9rem;
  color: #666;
  margin-top: 10px;
}

.page-khuyen-mai__promo-grid,
.page-khuyen-mai__steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-top: 30px;
  margin-bottom: 40px;
}

.page-khuyen-mai__card {
  background-color: var(--card-bg-color);
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  padding: 25px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.page-khuyen-mai__promo-card .page-khuyen-mai__card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 15px;
}

.page-khuyen-mai__promo-card .page-khuyen-mai__card-title {
  font-size: 1.4rem;
  color: var(--primary-color);
  margin-top: 0;
}

.page-khuyen-mai__promo-card .page-khuyen-mai__card-text {
  font-size: 0.95rem;
  color: var(--text-main-color);
  flex-grow: 1;
  margin-bottom: 20px;
}

.page-khuyen-mai__step-card .page-khuyen-mai__step-title {
  font-size: 1.3rem;
  color: var(--primary-color);
  margin-top: 0;
  margin-bottom: 10px;
}

.page-khuyen-mai__step-card .page-khuyen-mai__step-text {
  font-size: 0.95rem;
  color: var(--text-main-color);
  flex-grow: 1;
  margin-bottom: 20px;
}

.page-khuyen-mai__dark-bg {
  background-color: var(--primary-color);
  color: #ffffff;
}

.page-khuyen-mai__dark-bg h3,
.page-khuyen-mai__dark-bg p,
.page-khuyen-mai__dark-bg li {
  color: #ffffff;
}

.page-khuyen-mai__light-bg {
  background-color: var(--card-bg-color);
  color: var(--text-main-color);
}

.page-khuyen-mai__warning-box {
  background-color: #fff3cd; /* Light warning yellow */
  border: 1px solid #ffeeba;
  color: #856404;
  padding: 20px;
  border-radius: 8px;
  margin-top: 30px;
  margin-bottom: 40px;
  text-align: center;
}

.page-khuyen-mai__warning-title {
  color: #856404;
  margin-top: 0;
}

.page-khuyen-mai__warning-text {
  color: #856404;
  margin-bottom: 20px;
}

.page-khuyen-mai__faq-list {
  margin-top: 30px;
}

.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.page-khuyen-mai__faq-item.page-khuyen-mai__dark-bg .page-khuyen-mai__faq-question {
  background-color: var(--primary-color);
  color: #ffffff;
}

.page-khuyen-mai__faq-item.page-khuyen-mai__light-bg .page-khuyen-mai__faq-question {
  background-color: var(--card-bg-color);
  color: var(--text-main-color);
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--border-color);
  list-style: none; /* For details/summary */
}

.page-khuyen-mai__faq-question::-webkit-details-marker {
  display: none;
}

.page-khuyen-mai__faq-toggle {
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 0.3s ease;
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
  transform: rotate(45deg);
}

.page-khuyen-mai__faq-answer {
  padding: 15px 25px 20px;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-main-color);
  background-color: var(--card-bg-color);
}

.page-khuyen-mai__faq-item.page-khuyen-mai__dark-bg .page-khuyen-mai__faq-answer {
  background-color: var(--primary-color);
  color: #ffffff;
}

.page-khuyen-mai__final-cta-buttons {
  margin-top: 50px;
  margin-bottom: 20px;
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-content {
    padding: 15px;
  }

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

  .page-khuyen-mai__hero-description {
    font-size: clamp(0.95rem, 2.2vw, 1.15rem);
  }

  .page-khuyen-mai__article-wrap {
    padding: 30px 15px;
  }

  .page-khuyen-mai__content-area {
    padding: 25px;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(1.6rem, 3.8vw, 2.2rem);
    margin-top: 30px;
    margin-bottom: 20px;
  }

  .page-khuyen-mai h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    margin-top: 25px;
    margin-bottom: 12px;
  }

  .page-khuyen-mai p,
  .page-khuyen-mai__list li {
    font-size: 1rem;
  }

  .page-khuyen-mai__btn {
    padding: 10px 20px;
    font-size: 0.95rem;
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-grid {
    gap: 20px;
  }

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

  .page-khuyen-mai__promo-card .page-khuyen-mai__card-title {
    font-size: 1.3rem;
  }

  .page-khuyen-mai__faq-question {
    font-size: 1rem;
    padding: 15px 20px;
  }

  .page-khuyen-mai__faq-answer {
    padding: 12px 20px 15px;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important; /* Ensure small top padding */
    padding-bottom: 30px;
  }

  .page-khuyen-mai__hero-content {
    top: auto;
    bottom: 0;
    transform: translate(-50%, 0%);
    width: 100%;
    padding: 20px 15px;
    position: relative; /* Change to relative to avoid overlay issues in some mobile views */
    background: rgba(0, 0, 0, 0.6); /* Add background for text readability */
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
  }

  .page-khuyen-mai__hero-image-wrapper {
    max-height: 300px;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    margin-bottom: 10px;
  }

  .page-khuyen-mai__hero-description {
    font-size: clamp(0.9rem, 3.5vw, 1.1rem);
    margin-bottom: 20px;
  }

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

  .page-khuyen-mai__btn,
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .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-left: 15px;
    padding-right: 15px;
  }

  .page-khuyen-mai__article-wrap {
    padding: 20px 15px !important;
  }

  .page-khuyen-mai__content-area {
    padding: 20px !important;
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-top: 25px;
    margin-bottom: 15px;
  }

  .page-khuyen-mai h3 {
    font-size: clamp(1.1rem, 4.5vw, 1.4rem);
    margin-top: 20px;
    margin-bottom: 10px;
  }

  .page-khuyen-mai p,
  .page-khuyen-mai__list li,
  .page-khuyen-mai__figcaption,
  .page-khuyen-mai__promo-card .page-khuyen-mai__card-text,
  .page-khuyen-mai__step-card .page-khuyen-mai__step-text,
  .page-khuyen-mai__faq-answer {
    font-size: 0.95rem !important;
    line-height: 1.6 !important;
  }

  .page-khuyen-mai__list {
    margin-left: 20px;
  }

  .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,
  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-grid,
  .page-khuyen-mai__faq-list {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 0px;
    padding-right: 0px;
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .page-khuyen-mai__promo-card .page-khuyen-mai__card-image {
    height: 160px;
  }

  .page-khuyen-mai__promo-card .page-khuyen-mai__card-title {
    font-size: 1.2rem;
  }

  .page-khuyen-mai__faq-question {
    font-size: 0.95rem;
    padding: 15px 15px;
  }

  .page-khuyen-mai__faq-answer {
    padding: 12px 15px 15px;
  }

  .page-khuyen-mai__warning-box {
    padding: 15px;
  }

  .page-khuyen-mai__cta-buttons {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 0px;
    padding-right: 0px;
    flex-wrap: wrap !important;
    gap: 10px;
  }
}