/* style/blog.css */
/* body đã padding-top: var(--header-offset) từ shared.css, không lặp lại ở đây */

:root {
  --primary-color: #26A9E0;
  --secondary-color: #FFFFFF;
  --login-button-color: #EA7C07;
  --text-dark: #333333;
  --text-light: #ffffff;
  --background-light: #ffffff;
  --background-dark: #1a1a1a; /* Giả định var(--black-color) là màu tối */
  --card-background-dark: rgba(255, 255, 255, 0.1);
}

.page-blog {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-light); /* Toàn bộ trang dùng chữ sáng vì body nền tối */
  background-color: var(--background-dark); /* Kế thừa từ body, nhưng đặt rõ để đảm bảo */
}

.page-blog__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Hero Section */
.page-blog__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 0; /* body đã xử lý padding-top cho header */
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, #26A9E0, #1a7bbd);
}

.page-blog__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
  margin-bottom: 30px;
}

.page-blog__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.page-blog__hero-content {
  z-index: 1;
  max-width: 900px;
  padding: 0 20px;
  color: var(--text-light);
}

.page-blog__main-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 700;
  margin-bottom: 15px;
  line-height: 1.2;
  color: var(--secondary-color);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.page-blog__hero-description {
  font-size: 1.15rem;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.9);
}

.page-blog__cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.page-blog__btn-primary,
.page-blog__btn-secondary {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-blog__btn-primary {
  background-color: var(--login-button-color); /* Màu đăng nhập */
  color: var(--secondary-color);
  border: 2px solid var(--login-button-color);
}

.page-blog__btn-primary:hover {
  background-color: darken(var(--login-button-color), 10%);
  border-color: darken(var(--login-button-color), 10%);
  transform: translateY(-2px);
}

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

.page-blog__btn-secondary:hover {
  background-color: var(--secondary-color);
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* General Section Styles */
.page-blog__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 15px;
  text-align: center;
  line-height: 1.3;
}

.page-blog__section-subtitle {
  font-size: 1.1rem;
  text-align: center;
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.7);
}

.page-blog__introduction-section {
  padding: 80px 0;
  background-color: var(--background-light);
  color: var(--text-dark);
}

.page-blog__introduction-section .page-blog__section-title {
  color: var(--primary-color);
}

.page-blog__introduction-section .page-blog__paragraph {
  font-size: 1.05rem;
  margin-bottom: 20px;
  text-align: justify;
}

.page-blog__featured-posts {
  padding: 80px 0;
  background-color: var(--background-dark);
  color: var(--text-light);
}

.page-blog__featured-posts .page-blog__section-title {
  color: var(--secondary-color);
}

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

.page-blog__post-card {
  display: flex;
  flex-direction: column;
  background: var(--card-background-dark);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: var(--text-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.page-blog__post-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.page-blog__post-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.page-blog__card-content {
  padding: 25px;
  flex-grow: 1;
}

.page-blog__card-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--secondary-color);
  line-height: 1.4;
}

.page-blog__card-meta {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 15px;
}

.page-blog__card-excerpt {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
}

.page-blog__read-more-btn {
  display: inline-block;
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 2px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.page-blog__read-more-btn:hover {
  color: var(--login-button-color);
  border-color: var(--login-button-color);
}

.page-blog__view-all-button-wrapper {
  text-align: center;
}

.page-blog__categories-section {
  padding: 80px 0;
  background-color: var(--background-light);
  color: var(--text-dark);
}

.page-blog__categories-section .page-blog__section-title {
  color: var(--primary-color);
}

.page-blog__categories-section .page-blog__section-subtitle {
  color: var(--text-dark);
}

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

.page-blog__category-card {
  background: var(--secondary-color);
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: var(--text-dark);
}

.page-blog__category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.page-blog__category-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--primary-color);
}

.page-blog__category-description {
  font-size: 1rem;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.page-blog__category-link {
  display: inline-block;
  color: var(--login-button-color);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--login-button-color);
  padding-bottom: 2px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.page-blog__category-link:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.page-blog__cta-section {
  padding: 80px 0;
  background: linear-gradient(90deg, #1a7bbd, #26A9E0);
  text-align: center;
  color: var(--text-light);
}

.page-blog__cta-content {
  max-width: 800px;
}

.page-blog__cta-section .page-blog__section-title {
  color: var(--secondary-color);
}

.page-blog__cta-section .page-blog__paragraph {
  font-size: 1.1rem;
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.9);
}

/* FAQ Section */
.page-blog__faq-section {
  padding: 80px 0;
  background-color: var(--background-light);
  color: var(--text-dark);
}

.page-blog__faq-section .page-blog__section-title {
  color: var(--primary-color);
}

.page-blog__faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.page-blog__faq-item {
  background: var(--secondary-color);
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.page-blog__faq-item summary {
  list-style: none;
}

.page-blog__faq-item summary::-webkit-details-marker {
  display: none;
}

.page-blog__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary-color);
  cursor: pointer;
  background-color: #f9f9f9;
  border-bottom: 1px solid #e0e0e0;
}

.page-blog__faq-question:hover {
  background-color: #f0f0f0;
}

.page-blog__faq-toggle {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--login-button-color);
  margin-left: 15px;
}

.page-blog__faq-item[open] .page-blog__faq-toggle {
  content: '−';
}

.page-blog__faq-answer {
  padding: 20px 25px;
  font-size: 1rem;
  color: var(--text-dark);
  background-color: var(--secondary-color);
  border-top: 1px solid #e0e0e0;
}

.page-blog__faq-answer p {
  margin-bottom: 0;
}

.highlight-keyword {
  color: var(--login-button-color);
  font-weight: 600;
}

/* Responsive Styles */
@media (max-width: 992px) {
  .page-blog__main-title {
    font-size: clamp(2rem, 5vw, 2.8rem);
  }
  .page-blog__hero-description {
    font-size: 1.05rem;
  }
  .page-blog__section-title {
    font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  }
  .page-blog__post-image {
    height: 180px;
  }
  .page-blog__card-title {
    font-size: 1.25rem;
  }
  .page-blog__category-title {
    font-size: 1.3rem;
  }
}

@media (max-width: 768px) {
  .page-blog {
    font-size: 16px;
    line-height: 1.6;
  }
  .page-blog__hero-section,
  .page-blog__introduction-section,
  .page-blog__featured-posts,
  .page-blog__categories-section,
  .page-blog__cta-section,
  .page-blog__faq-section {
    padding: 40px 0;
  }
  .page-blog__container {
    padding: 0 15px;
  }
  .page-blog__hero-content {
    padding: 0 15px;
  }
  .page-blog__cta-buttons {
    flex-direction: column;
    gap: 15px;
    padding: 0 15px;
  }
  .page-blog__btn-primary,
  .page-blog__btn-secondary {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 20px;
    font-size: 1rem;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-blog img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  
  .page-blog__section,
  .page-blog__card,
  .page-blog__container,
  .page-blog__hero-image-wrapper,
  .page-blog__cta-buttons,
  .page-blog__post-grid,
  .page-blog__category-grid,
  .page-blog__faq-list {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }
  .page-blog__post-image {
    height: 160px;
  }
  .page-blog__card-content {
    padding: 15px;
  }
  .page-blog__card-title {
    font-size: 1.1rem;
  }
  .page-blog__faq-question {
    font-size: 1rem;
    padding: 15px 20px;
  }
  .page-blog__faq-answer {
    padding: 15px 20px;
  }
}

@media (max-width: 480px) {
  .page-blog__main-title {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
  }
  .page-blog__hero-description {
    font-size: 0.95rem;
  }
  .page-blog__section-title {
    font-size: clamp(1.4rem, 5.5vw, 2rem);
  }
  .page-blog__btn-primary,
  .page-blog__btn-secondary {
    font-size: 0.95rem;
    padding: 10px 15px;
  }
  .page-blog__post-card {
    margin: 0 15px;
  }
  .page-blog__category-card {
    padding: 20px;
  }
  .page-blog__category-title {
    font-size: 1.2rem;
  }
}