/* style/khuyen-mai.css */

:root {
  --primary-color: #017439;
  --secondary-color: #FFFFFF;
  --text-dark: #333333;
  --text-light: #ffffff;
  --button-register-bg: #C30808;
  --button-login-bg: #C30808;
  --button-register-text: #FFFF00;
  --button-login-text: #FFFF00;
  --border-light: #e0e0e0;
}

.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--secondary-color); /* Assuming shared.css sets body background to var(--secondary-color) which is white */
}

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

.page-khuyen-mai__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}

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

.page-khuyen-mai__hero-content {
  width: 100%;
  max-width: 1150px;
  padding: 40px 20px;
  box-sizing: border-box;
  background: var(--secondary-color); /* Light background for text block */
  color: var(--text-dark);
  border-radius: 8px;
  margin-top: -80px; /* Overlap slightly for visual effect, but not over image */
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.page-khuyen-mai__main-title {
  font-size: clamp(2em, 4vw, 3.2em);
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-color);
  line-height: 1.2;
}

.page-khuyen-mai__intro-text {
  font-size: 1.1em;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

.page-khuyen-mai__btn {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease, transform 0.2s 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: var(--button-register-bg);
  color: var(--button-register-text);
  border: 2px solid var(--button-register-bg);
}

.page-khuyen-mai__btn-primary:hover {
  background-color: #a30606;
  transform: translateY(-2px);
}

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

.page-khuyen-mai__btn-secondary:hover {
  background-color: var(--button-login-bg);
  color: var(--button-login-text);
  transform: translateY(-2px);
}

.page-khuyen-mai__btn-contact {
  background-color: var(--primary-color);
  color: var(--text-light);
  border: 2px solid var(--primary-color);
}

.page-khuyen-mai__btn-contact:hover {
  background-color: #005a2d;
  transform: translateY(-2px);
}

.page-khuyen-mai__btn--small {
  padding: 8px 18px;
  font-size: 0.9em;
}

.page-khuyen-mai__btn--large {
  padding: 15px 35px;
  font-size: 1.1em;
}

.page-khuyen-mai__section {
  padding: 60px 0;
  text-align: center;
}

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

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

.page-khuyen-mai__container {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-khuyen-mai__section-title {
  font-size: clamp(1.8em, 3.5vw, 2.8em);
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.page-khuyen-mai__section-title--white {
  color: var(--text-light);
}

.page-khuyen-mai__section-description {
  font-size: 1.05em;
  margin-bottom: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-khuyen-mai__section-description--white {
  color: rgba(255, 255, 255, 0.9);
}

.page-khuyen-mai__promo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.page-khuyen-mai__promo-card {
  background-color: var(--secondary-color);
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  padding: 25px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px solid var(--border-light);
}

.page-khuyen-mai__promo-image {
  width: 100%;
  height: auto;
  max-height: 250px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  display: block;
}

.page-khuyen-mai__promo-card-title {
  font-size: 1.5em;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-khuyen-mai__promo-card-text {
  font-size: 0.95em;
  color: var(--text-dark);
  margin-bottom: 25px;
  flex-grow: 1;
}

.page-khuyen-mai__sub-title {
  font-size: clamp(1.4em, 2.5vw, 2em);
  font-weight: 600;
  color: var(--primary-color);
  margin-top: 40px;
  margin-bottom: 20px;
}

.page-khuyen-mai__text-block {
  font-size: 1em;
  margin-bottom: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  text-align: justify;
}

.page-khuyen-mai__list {
  list-style: disc inside;
  text-align: left;
  max-width: 900px;
  margin: 0 auto 40px;
  padding-left: 20px;
}

.page-khuyen-mai__list li {
  margin-bottom: 10px;
  font-size: 1em;
  color: var(--text-dark);
}

.page-khuyen-mai__list li strong {
  color: var(--primary-color);
}

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

.page-khuyen-mai__step-item {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 25px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-light);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.page-khuyen-mai__step-image {
  width: 100%;
  height: auto;
  max-height: 180px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  display: block;
}

.page-khuyen-mai__step-title {
  font-size: 1.4em;
  font-weight: 600;
  color: var(--button-register-text); /* Yellowish color for titles on dark background */
  margin-bottom: 15px;
}

.page-khuyen-mai__step-text {
  font-size: 0.95em;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
  flex-grow: 1;
}

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

.page-khuyen-mai__info-card {
  background-color: var(--secondary-color);
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  padding: 25px;
  text-align: left;
  border: 1px solid var(--border-light);
}

.page-khuyen-mai__info-card-title {
  font-size: 1.4em;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-khuyen-mai__info-card-text {
  font-size: 0.95em;
  color: var(--text-dark);
}

.page-khuyen-mai__faq-section {
  text-align: left;
}

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

.page-khuyen-mai__faq-item {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  color: var(--text-light);
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-size: 1.1em;
  font-weight: 600;
  cursor: pointer;
  background-color: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--button-register-text); /* Yellowish color for FAQ questions */
  list-style: none; /* For details/summary */
}

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

.page-khuyen-mai__faq-question:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.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: 0.95em;
  color: rgba(255, 255, 255, 0.8);
}

.page-khuyen-mai__faq-answer p {
  margin-bottom: 10px;
}

.page-khuyen-mai__faq-answer .page-khuyen-mai__btn {
  margin-top: 15px;
}

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

.page-khuyen-mai__reason-card {
  background-color: var(--secondary-color);
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  padding: 25px;
  text-align: center;
  border: 1px solid var(--border-light);
}

.page-khuyen-mai__reason-title {
  font-size: 1.4em;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-khuyen-mai__reason-text {
  font-size: 0.95em;
  color: var(--text-dark);
}

.page-khuyen-mai__cta-banner {
  padding: 80px 0;
  background-color: var(--primary-color);
  color: var(--text-light);
  text-align: center;
  overflow: hidden;
}

.page-khuyen-mai__cta-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}

.page-khuyen-mai__cta-image {
  width: 100%;
  max-width: 800px; /* Limit image width in banner */
  height: auto;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
  display: block;
}

.page-khuyen-mai__cta-content {
  max-width: 900px;
}

.page-khuyen-mai__cta-title {
  font-size: clamp(2em, 4vw, 3em);
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--button-register-text); /* Yellowish color for CTA title */
}

.page-khuyen-mai__cta-description {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.9);
}

.page-khuyen-mai__copyright {
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
  color: var(--text-dark);
  background-color: var(--secondary-color);
  border-top: 1px solid var(--border-light);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
  .page-khuyen-mai {
    font-size: 16px;
    line-height: 1.6;
  }

  /* 1. 顶区标题 + 双 CTA */
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important; /* Ensure small top padding */
  }

  .page-khuyen-mai__hero-content {
    padding: 30px 15px;
    margin-top: -50px; /* Adjust overlap for mobile */
  }

  .page-khuyen-mai__main-title {
    font-size: 2.2em;
  }

  .page-khuyen-mai__intro-text {
    font-size: 1em;
  }

  .page-khuyen-mai__top-cta {
    flex-direction: column;
    gap: 10px;
  }

  .page-khuyen-mai__btn {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 15px;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* 2. 单栏长文容器 */
  .page-khuyen-mai__container {
    padding-left: 15px;
    padding-right: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__section-title {
    font-size: 2em;
  }

  .page-khuyen-mai__section-description {
    font-size: 0.95em;
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__info-cards,
  .page-khuyen-mai__reasons-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__info-card,
  .page-khuyen-mai__reason-card {
    padding: 20px;
  }

  .page-khuyen-mai__sub-title {
    font-size: 1.5em;
  }

  .page-khuyen-mai__text-block,
  .page-khuyen-mai__list li,
  .page-khuyen-mai__info-card-text,
  .page-khuyen-mai__reason-text {
    font-size: 0.9em;
    text-align: left;
  }

  .page-khuyen-mai__list {
    padding-left: 15px;
  }
}