/* style/blog.css */
:root {
  --primary-color: #2F6BFF;
  --secondary-color: #6FA3FF;
  --button-gradient: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
  --card-bg: #FFFFFF;
  --background-color: #F4F7FB;
  --text-main-color: #1F2D3D;
  --text-dark-color: #000000;
  --border-color: #D6E2FF;
  --glow-color: #A5C4FF;
}

.page-blog {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-main-color); /* Default text color for light background */
  background-color: var(--background-color);
}

.page-blog__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0 60px 0; /* body handles top padding, this is for visual spacing */
  background-color: var(--primary-color);
  color: #ffffff;
  text-align: center;
}

.page-blog__hero-image-wrapper {
  width: 100%;
  overflow: hidden;
  position: relative;
  height: 0;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
}

.page-blog__hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-blog__hero-content {
  position: relative;
  z-index: 10;
  max-width: 900px;
  padding: 40px 20px;
}

.page-blog__main-title {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #ffffff;
}

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

.page-blog__hero-actions {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-blog__btn-primary,
.page-blog__btn-secondary {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  box-sizing: border-box;
}

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

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

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

.page-blog__btn-secondary:hover {
  background-color: var(--primary-color);
  color: #ffffff;
}

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

.page-blog__section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-dark-color);
  text-align: center;
  margin-bottom: 40px;
}

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

.page-blog__article-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.page-blog__article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

.page-blog__article-content {
  padding: 25px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.page-blog__article-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.3;
}

.page-blog__article-title a {
  color: var(--text-dark-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-blog__article-title a:hover {
  color: var(--primary-color);
}

.page-blog__article-meta {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 15px;
}

.page-blog__article-excerpt {
  font-size: 1rem;
  color: var(--text-main-color);
  margin-bottom: 20px;
  flex-grow: 1;
}

.page-blog__read-more {
  display: inline-block;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.page-blog__read-more:hover {
  text-decoration: underline;
}

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

.page-blog__featured-article {
  background-color: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  padding: 40px;
  margin-top: 40px;
}

.page-blog__content-block h3 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-dark-color);
  margin-top: 30px;
  margin-bottom: 15px;
}

.page-blog__content-block h4 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-dark-color);
  margin-top: 25px;
  margin-bottom: 10px;
}

.page-blog__content-block p {
  margin-bottom: 20px;
  color: var(--text-main-color);
  font-size: 1.05rem;
  line-height: 1.7;
}

.page-blog__list,
.page-blog__ordered-list {
  margin-bottom: 20px;
  padding-left: 25px;
  color: var(--text-main-color);
}

.page-blog__list li,
.page-blog__ordered-list li {
  margin-bottom: 10px;
  font-size: 1.05rem;
  color: var(--text-main-color);
}

.page-blog__content-image {
  width: 100%;
  height: auto;
  display: block;
  margin: 30px auto;
  border-radius: 8px;
  max-width: 800px; /* Recommended content image size */
}

.page-blog__cta-wrapper {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 40px;
  flex-wrap: wrap;
}

.page-blog__faq-section {
  margin-top: 60px;
}

.page-blog__faq-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.page-blog__faq-item {
  background-color: var(--card-bg);
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.page-blog__faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dark-color);
  transition: background-color 0.3s ease;
}

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

.page-blog__faq-item summary:hover {
  background-color: #f9f9f9;
}

.page-blog__faq-toggle {
  font-size: 1.5rem;
  line-height: 1;
  margin-left: 15px;
  color: var(--primary-color);
}

.page-blog__faq-answer {
  padding: 0 25px 20px 25px;
  font-size: 1.05rem;
  color: var(--text-main-color);
  line-height: 1.7;
}

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

/* Desktop (>= 1024px) */
@media (min-width: 1024px) {
  .page-blog__hero-section {
    padding-bottom: 80px;
  }
}

/* Tablet (769px - 1023px) */
@media (max-width: 1023px) {
  .page-blog__hero-content {
    padding: 30px 20px;
  }

  .page-blog__main-title {
    font-size: clamp(2rem, 5vw, 3rem);
  }

  .page-blog__hero-description {
    font-size: 1.05rem;
  }

  .page-blog__section-title {
    font-size: 2rem;
  }

  .page-blog__article-title {
    font-size: 1.3rem;
  }

  .page-blog__content-block h3 {
    font-size: 1.6rem;
  }

  .page-blog__faq-item summary {
    font-size: 1.1rem;
  }

  .page-blog__faq-answer {
    font-size: 1rem;
  }
}

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

  .page-blog__hero-section {
    padding: 10px 15px 40px 15px;
  }

  .page-blog__main-title {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
    margin-bottom: 15px;
  }

  .page-blog__hero-description {
    font-size: 1rem;
    margin-bottom: 25px;
  }

  .page-blog__hero-actions,
  .page-blog__cta-wrapper {
    flex-direction: column;
    gap: 10px;
    width: 100%;
  }

  .page-blog__btn-primary,
  .page-blog__btn-secondary,
  .page-blog a[class*="button"],
  .page-blog 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: 12px 20px;
  }

  .page-blog__container {
    padding: 20px 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-blog__section-title {
    font-size: 1.8rem;
    margin-bottom: 30px;
  }

  .page-blog__articles-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-blog__article-card {
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  }

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

  .page-blog__article-content {
    padding: 20px;
  }

  .page-blog__article-title {
    font-size: 1.2rem;
  }

  .page-blog__article-meta,
  .page-blog__article-excerpt {
    font-size: 0.95rem;
  }

  .page-blog__featured-article {
    padding: 30px 20px;
  }

  .page-blog__content-block h3 {
    font-size: 1.4rem;
  }

  .page-blog__content-block h4 {
    font-size: 1.2rem;
  }

  .page-blog__content-block p,
  .page-blog__list li,
  .page-blog__ordered-list li {
    font-size: 1rem;
  }

  .page-blog__content-image {
    margin: 20px auto;
  }

  .page-blog__faq-item summary {
    padding: 15px 20px;
    font-size: 1rem;
  }

  .page-blog__faq-answer {
    padding: 0 20px 15px 20px;
    font-size: 0.95rem;
  }

  /* Video Responsive Styles (even if no video on this page, as per requirements) */
  .page-blog video,
  .page-blog__video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  .page-blog__video-section,
  .page-blog__video-container,
  .page-blog__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }

  .page-blog__video-section {
    padding-top: 10px !important; /* body đã đảm nhận --header-offset, đây là khoảng cách nhỏ */
  }

  .page-blog__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Image Responsive Styles */
  .page-blog img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-blog__section,
  .page-blog__card,
  .page-blog__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
}