.page-mahjong {
  font-family: 'Arial', sans-serif;
  color: #f8f9fa; /* Light text for dark body background */
  background-color: var(--primary-color); /* Inherits from shared.css, assuming dark */
  line-height: 1.6;
  padding-top: 10px; /* Ensure content is not hidden by fixed header */
}

.page-mahjong__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  box-sizing: border-box;
}

.page-mahjong__section-title {
  font-size: 36px;
  color: #FFD700; /* Gold highlight */
  text-align: center;
  margin-bottom: 40px;
  font-weight: 700;
}

.page-mahjong__section-title .highlight {
  color: #ffffff;
}

.page-mahjong__text-block {
  font-size: 18px;
  margin-bottom: 20px;
  text-align: justify;
  color: #e0e0e0;
}

.page-mahjong__text-block--center {
  text-align: center;
}

.page-mahjong__hero-banner {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  padding: 80px 20px;
  background: linear-gradient(90deg, #0A192F 0%, #1A2F4A 100%);
  color: #ffffff;
  gap: 40px;
}

.page-mahjong__hero-content {
  flex: 1;
  max-width: 600px;
}

.page-mahjong__hero-title {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
  color: #ffffff;
}

.page-mahjong__hero-title .highlight {
  color: #FFD700;
}

.page-mahjong__hero-description {
  font-size: 20px;
  margin-bottom: 30px;
  color: #e0e0e0;
}

.page-mahjong__hero-description .highlight {
  color: #FFD700;
  font-weight: bold;
}

.page-mahjong__hero-actions {
  display: flex;
  gap: 20px;
}

.page-mahjong__btn {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
}

.page-mahjong__btn--primary {
  background-color: #FFD700;
  color: #0A192F;
}

.page-mahjong__btn--primary:hover {
  background-color: #e6c200;
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.page-mahjong__btn--secondary {
  background-color: transparent;
  color: #FFD700;
  border-color: #FFD700;
}

.page-mahjong__btn--secondary:hover {
  background-color: #FFD700;
  color: #0A192F;
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.page-mahjong__hero-image-wrapper {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 600px;
}

.page-mahjong__hero-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  display: block;
}

.page-mahjong__introduction {
  background-color: var(--primary-color);
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__rules {
  background-color: #0A192F;
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__features {
  background-color: var(--primary-color);
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__guide {
  background-color: #0A192F;
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__strategies {
  background-color: var(--primary-color);
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__promotions {
  background-color: #0A192F;
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__faq {
  background-color: var(--primary-color);
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__contact {
  background-color: #0A192F;
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-mahjong__dark-section {
  background-color: #0A192F;
  color: #ffffff;
}

.page-mahjong__light-section {
  background-color: var(--primary-color);
  color: #f8f9fa;
}

.page-mahjong__dark-bg-card {
  background-color: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(255, 215, 0, 0.3);
}

.page-mahjong__light-bg-card {
  background-color: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border: 1px solid rgba(255, 215, 0, 0.3);
}

.page-mahjong__card {
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-mahjong__card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.page-mahjong__card-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 15px;
  color: #FFD700;
}

.page-mahjong__card-image {
  max-width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  border: 2px solid #FFD700;
  display: block;
}

.page-mahjong__grid-2-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.page-mahjong__grid-3-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.page-mahjong__list {
  list-style: none;
  padding: 0;
  text-align: left;
  width: 100%;
}

.page-mahjong__list li {
  margin-bottom: 10px;
  font-size: 17px;
  color: #e0e0e0;
  position: relative;
  padding-left: 25px;
}

.page-mahjong__list li::before {
  content: '▪';
  color: #FFD700;
  position: absolute;
  left: 0;
  font-weight: bold;
}

.page-mahjong__cta-section {
  text-align: center;
  margin-top: 50px;
  padding: 30px;
  background-color: rgba(255, 215, 0, 0.1);
  border-radius: 12px;
  border: 1px solid rgba(255, 215, 0, 0.3);
}

.page-mahjong__cta-text {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 25px;
  color: #ffffff;
}

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

.page-mahjong__step-card {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  position: relative;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-mahjong__step-number {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #FFD700;
  color: #0A192F;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  border: 3px solid #0A192F;
}

.page-mahjong__step-card .page-mahjong__card-title {
  margin-top: 20px;
  font-size: 22px;
}

.page-mahjong__strategy-card .page-mahjong__card-image {
  height: 200px;
}

.page-mahjong__promo-list {
  list-style: none;
  padding: 0;
  max-width: 800px;
  margin: 0 auto 40px auto;
}

.page-mahjong__promo-list li {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 215, 0, 0.2);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  font-size: 18px;
  color: #e0e0e0;
}

.page-mahjong__promo-list li img.page-mahjong__list-icon {
  width: 60px;
  height: 60px;
  margin-right: 20px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #FFD700;
  flex-shrink: 0;
}

/* FAQ容器样式 */
.page-mahjong__faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.page-mahjong__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 215, 0, 0.2);
}

/* FAQ默认状态 - 答案隐藏 */
.page-mahjong__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
  padding: 0 20px;
  opacity: 0;
  color: #cccccc;
}

/* FAQ展开状态 - 🚨 Sử dụng!important và đủ lớn max-height để đảm bảo có thể mở rộng */
.page-mahjong__faq-item.active .page-mahjong__faq-answer {
  max-height: 2000px !important; /* 🚨 Sử dụng!important để đảm bảo ưu tiên, giá trị đủ lớn để chứa bất kỳ nội dung nào */
  padding: 20px !important;
  opacity: 1;
  background: rgba(255, 215, 0, 0.08);
  border-top: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: 0 0 8px 8px;
}

/* Vấn đề kiểu dáng */
.page-mahjong__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
  color: #ffffff;
}

.page-mahjong__faq-question:hover {
  background: rgba(255, 255, 255, 0.15);
}

.page-mahjong__faq-question:active {
  background: rgba(255, 255, 255, 0.2);
}

/* Vấn đề tiêu đề kiểu dáng */
.page-mahjong__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  pointer-events: none; /* Ngăn chặn thẻ h3 chặn sự kiện nhấp chuột */
  color: #FFD700;
}

.page-mahjong__faq-question h3 .highlight {
  color: #ffffff;
}

/* Chuyển đổi biểu tượng */
.page-mahjong__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  line-height: 1;
  color: #FFD700;
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
  margin-left: 15px;
  pointer-events: none; /* Ngăn chặn biểu tượng chặn sự kiện nhấp chuột */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.page-mahjong__faq-item.active .page-mahjong__faq-toggle {
  color: #ffffff;
  transform: rotate(45deg);
}

.page-mahjong__contact-info {
  text-align: center;
  margin-top: 30px;
  margin-bottom: 40px;
  font-size: 18px;
  color: #e0e0e0;
}

.page-mahjong__contact-info p {
  margin-bottom: 10px;
}

.page-mahjong a {
  color: #FFD700;
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-mahjong a:hover {
  color: #e6c200;
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-mahjong__hero-banner {
    flex-direction: column;
    text-align: center;
    padding: 60px 20px;
  }

  .page-mahjong__hero-content {
    max-width: 100%;
    margin-bottom: 40px;
  }

  .page-mahjong__hero-image-wrapper {
    max-width: 100%;
  }

  .page-mahjong__hero-title {
    font-size: 42px;
  }

  .page-mahjong__hero-description {
    font-size: 18px;
  }

  .page-mahjong__hero-actions {
    justify-content: center;
  }

  .page-mahjong__section-title {
    font-size: 32px;
  }

  .page-mahjong__text-block {
    font-size: 17px;
  }

  .page-mahjong__grid-2-cols,
  .page-mahjong__grid-3-cols,
  .page-mahjong__steps-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .page-mahjong {
    font-size: 16px;
    line-height: 1.6;
    padding-top: 10px;
  }

  .page-mahjong__container {
    padding: 30px 15px;
  }

  .page-mahjong__hero-banner {
    padding: 40px 15px;
  }

  .page-mahjong__hero-title {
    font-size: 32px;
  }

  .page-mahjong__hero-description {
    font-size: 16px;
  }

  .page-mahjong__hero-actions {
    flex-direction: column;
    gap: 15px;
  }

  .page-mahjong__btn {
    padding: 12px 25px;
    font-size: 16px;
  }

  .page-mahjong__section-title {
    font-size: 28px;
    margin-bottom: 30px;
  }

  .page-mahjong__text-block {
    font-size: 16px;
  }

  .page-mahjong__card {
    padding: 25px;
  }

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

  .page-mahjong__card-image {
    height: 180px;
  }

  .page-mahjong__step-number {
    width: 45px;
    height: 45px;
    font-size: 24px;
    top: -15px;
  }

  .page-mahjong__step-card .page-mahjong__card-title {
    margin-top: 15px;
    font-size: 20px;
  }

  .page-mahjong__promo-list li {
    font-size: 16px;
    padding: 15px;
  }

  .page-mahjong__promo-list li img.page-mahjong__list-icon {
    width: 50px;
    height: 50px;
    margin-right: 15px;
  }

  .page-mahjong__faq-question {
    padding: 15px;
    flex-wrap: wrap;
  }
  
  .page-mahjong__faq-question h3 {
    font-size: 16px;
    margin-bottom: 0;
    width: calc(100% - 40px);
  }
  
  .page-mahjong__faq-toggle {
    margin-left: 10px;
    width: 28px;
    height: 28px;
    font-size: 24px;
  }
  
  .page-mahjong__faq-answer {
    padding: 0 15px;
  }
  
  .page-mahjong__faq-item.active .page-mahjong__faq-answer {
    padding: 15px !important;
  }

  .page-mahjong__contact-info {
    font-size: 16px;
  }

  /* Tất cả hình ảnh phải thích ứng với thiết bị di động */
  .page-mahjong img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    box-sizing: border-box !important;
  }
  
  .page-mahjong__section,
  .page-mahjong__card,
  .page-mahjong__container,
  .page-mahjong__hero-banner,
  .page-mahjong__introduction,
  .page-mahjong__rules,
  .page-mahjong__features,
  .page-mahjong__guide,
  .page-mahjong__strategies,
  .page-mahjong__promotions,
  .page-mahjong__faq,
  .page-mahjong__contact {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
}