/* style/khuyen-mai.css */
.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333333; /* Dark text for light body background */
  background-color: #FFFFFF;
}

.page-khuyen-mai__hero-section {
  position: relative;
  padding-top: 10px; /* Small top padding, body handles header offset */
  padding-bottom: 40px;
  background-color: #f0f0f0; /* Light background for hero section */
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.page-khuyen-mai__hero-image-wrapper {
  width: 100%;
  max-height: 500px; /* Limit height for hero image */
  overflow: hidden;
  margin-bottom: 20px;
}

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

.page-khuyen-mai__hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  color: #017439;
  margin-bottom: 15px;
  font-weight: bold;
  line-height: 1.2;
}

.page-khuyen-mai__lead-text {
  font-size: 1.15rem;
  margin-bottom: 30px;
  color: #555555;
}

.page-khuyen-mai__cta-group {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 20px;
}

.page-khuyen-mai__cta-group--center {
  justify-content: center;
  margin-top: 30px;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
  text-align: center;
}

.page-khuyen-mai__btn-primary {
  background-color: #C30808; /* Use #C30808 for primary action (Register/Login) */
  color: #FFFF00; /* Use #FFFF00 for text on primary button */
  border: 2px solid #C30808;
}

.page-khuyen-mai__btn-primary:hover {
  background-color: #a00606;
  border-color: #a00606;
}

.page-khuyen-mai__btn-secondary {
  background-color: #017439;
  color: #FFFFFF;
  border: 2px solid #017439;
}

.page-khuyen-mai__btn-secondary:hover {
  background-color: #005a2d;
  border-color: #005a2d;
}

.page-khuyen-mai__btn-small {
  padding: 10px 20px;
  font-size: 0.9em;
  border-radius: 6px;
}

.page-khuyen-mai__section {
  padding: 40px 0;
  margin-bottom: 20px;
}

.page-khuyen-mai__article-wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-khuyen-mai__title {
  font-size: 2.2rem;
  color: #017439;
  margin-bottom: 25px;
  text-align: center;
  font-weight: bold;
}

.page-khuyen-mai__subtitle {
  font-size: 1.6rem;
  color: #017439;
  margin-top: 30px;
  margin-bottom: 15px;
  font-weight: bold;
}

.page-khuyen-mai__subtitle--white {
  color: #FFFFFF;
}

.page-khuyen-mai__text-block {
  font-size: 1.05rem;
  margin-bottom: 15px;
  line-height: 1.7;
  color: #333333;
}

.page-khuyen-mai__text-block--white {
  color: #f0f0f0;
}

.page-khuyen-mai__list {
  list-style: disc inside;
  margin-left: 20px;
  margin-bottom: 20px;
  color: #333333;
}

.page-khuyen-mai__list-item {
  margin-bottom: 8px;
}

.page-khuyen-mai__promo-box {
  border-radius: 12px;
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.page-khuyen-mai__dark-bg {
  background-color: #017439;
  color: #FFFFFF;
}

.page-khuyen-mai__light-bg {
  background-color: #FFFFFF;
  color: #333333;
}

.page-khuyen-mai__figure {
  margin: 25px 0;
  text-align: center;
}

.page-khuyen-mai__image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-khuyen-mai__figcaption {
  font-size: 0.9em;
  color: #777777;
  margin-top: 10px;
}

.page-khuyen-mai__figcaption--white {
  color: #cccccc;
}

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

.page-khuyen-mai__step-card {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  padding: 25px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

.page-khuyen-mai__step-title {
  font-size: 1.4rem;
  color: #017439;
  margin-bottom: 15px;
  font-weight: bold;
}

.page-khuyen-mai__step-description {
  font-size: 1rem;
  color: #555555;
  margin-bottom: 20px;
  flex-grow: 1;
}

.page-khuyen-mai__faq-section {
  margin-top: 40px;
  margin-bottom: 40px;
}

.page-khuyen-mai__faq-item {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  margin-bottom: 15px;
  padding: 20px;
}

.page-khuyen-mai__faq-question {
  font-size: 1.2rem;
  color: #017439;
  font-weight: bold;
  margin-bottom: 10px;
}

.page-khuyen-mai__faq-answer {
  font-size: 1rem;
  color: #555555;
  line-height: 1.6;
}

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

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
  .page-khuyen-mai__article-wrap {
    padding: 0 15px;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(2rem, 4.5vw, 2.8rem);
  }

  .page-khuyen-mai__lead-text {
    font-size: 1.1rem;
  }

  .page-khuyen-mai__title {
    font-size: 2rem;
  }

  .page-khuyen-mai__subtitle {
    font-size: 1.5rem;
  }

  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary {
    padding: 12px 25px;
  }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
  /* 1. Top section (title + CTAs) */
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important; /* Ensure small top padding */
    padding-bottom: 30px;
  }

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

  .page-khuyen-mai__hero-content {
    padding: 0 15px;
  }

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

  .page-khuyen-mai__lead-text {
    font-size: 1rem;
    margin-bottom: 20px;
  }

  .page-khuyen-mai__cta-group {
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
  }

  /* 4. Buttons and button containers */
  .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__cta-group,
  .page-khuyen-mai__button-group,
  .page-khuyen-mai__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 0px;
    padding-right: 0px;
    flex-wrap: wrap !important;
    gap: 10px;
  }

  /* 2. Single-column long text container */
  .page-khuyen-mai__article-wrap,
  .page-khuyen-mai__section,
  .page-khuyen-mai__promo-box,
  .page-khuyen-mai__step-card,
  .page-khuyen-mai__faq-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-khuyen-mai__title {
    font-size: 1.8rem;
    margin-bottom: 20px;
  }

  .page-khuyen-mai__subtitle {
    font-size: 1.3rem;
    margin-top: 25px;
  }

  .page-khuyen-mai__text-block,
  .page-khuyen-mai__list-item,
  .page-khuyen-mai__figcaption,
  .page-khuyen-mai__step-description,
  .page-khuyen-mai__faq-answer {
    font-size: 0.95rem;
  }

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

  .page-khuyen-mai__figure {
    margin: 15px 0;
  }

  .page-khuyen-mai__promo-box {
    padding: 20px;
    margin-bottom: 20px;
  }

  .page-khuyen-mai__step-by-step {
    grid-template-columns: 1fr;
    gap: 15px;
    margin-top: 20px;
    margin-bottom: 20px;
  }

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

  .page-khuyen-mai__step-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
  }

  /* 5. Registration tutorial and FAQ block (FAQ is simplified to H3/P, no JS accordion) */
  .page-khuyen-mai__faq-section {
    margin-top: 20px;
    margin-bottom: 20px;
  }

  .page-khuyen-mai__faq-item {
    padding: 15px;
    margin-bottom: 10px;
  }

  .page-khuyen-mai__faq-question {
    font-size: 1.1rem;
    margin-bottom: 8px;
  }
}