/* CSS cho trang Blog */

/* Biến màu sắc */
:root {
  --color-primary: #C91F17;
  --color-secondary: #E53935;
  --color-card-bg: #D32F2F;
  --color-background-main: #B71C1C;
  --color-text-light: #FFF5E1;
  --color-border-gold: #F2B544;
  --color-glow: #FFCC66;
  --color-gold: #F4D34D;
  --color-deep-red: #7A0E0E;
  --color-button-gradient: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  --color-text-dark: #333333;
}

.page-blog {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--color-text-dark); /* Mặc định chữ tối trên nền sáng */
  background-color: var(--color-background-main); /* Nền chính của trang */
}

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

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

/* HERO Section */
.page-blog__hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: 10px; /* Chỉ 10px padding-top, không dùng var(--header-offset) */
  background-color: var(--color-background-main);
  color: var(--color-text-light);
  position: relative;
  overflow: hidden;
}

.page-blog__hero-image {
  width: 100%;
  max-height: 600px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-blog__hero-image img {
  width: 100%;
  height: auto;
  object-fit: cover; /* Đảm bảo ảnh cover toàn bộ */
  display: block;
}

.page-blog__hero-content {
  position: relative;
  padding: 40px 20px;
  max-width: 900px;
  z-index: 1;
}

.page-blog__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
  color: var(--color-text-light);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-blog__intro-text {
  font-size: 1.15rem;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--color-text-light);
}

.page-blog__cta-button {
  display: inline-block;
  background: var(--color-button-gradient);
  color: var(--color-deep-red);
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-blog__cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  opacity: 0.9;
}

.page-blog__cta-button--secondary {
  background: var(--color-deep-red);
  color: var(--color-text-light);
  border: 1px solid var(--color-border-gold);
}

.page-blog__cta-button--secondary:hover {
  background: var(--color-secondary);
}

/* Latest Blog Posts */
.page-blog__latest-posts {
  background-color: var(--color-background-main);
  color: var(--color-text-light);
}

.page-blog__section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: var(--color-text-light);
}

.page-blog__section-title--light {
  color: var(--color-text-light);
}

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

.page-blog__post-card {
  background-color: var(--color-card-bg);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: var(--color-text-light);
}

.page-blog__post-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

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

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

.page-blog__post-date {
  font-size: 0.9rem;
  color: var(--color-gold);
  margin-bottom: 10px;
  display: block;
}

.page-blog__card-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 15px;
  line-height: 1.4;
}

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

.page-blog__card-title a:hover {
  color: var(--color-gold);
}

.page-blog__card-snippet {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.page-blog__read-more:hover {
  color: var(--color-glow);
}

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

/* In-depth Guides & Strategies, Why Choose 99vin */
.page-blog__guides-strategies, .page-blog__why-99vin {
  background-color: var(--color-background-main);
  color: var(--color-text-light);
}

.page-blog__article-body p {
  margin-bottom: 1.5em;
  font-size: 1.05rem;
  color: var(--color-text-light);
}

.page-blog__sub-title {
  font-size: 1.8rem;
  font-weight: 600;
  margin-top: 35px;
  margin-bottom: 20px;
  color: var(--color-gold);
}

.page-blog__sub-title--light {
  color: var(--color-gold);
}

.page-blog__text-light {
  color: var(--color-text-light);
}

/* FAQ Section */
.page-blog__faq-section {
  background-color: var(--color-background-main);
  color: var(--color-text-light);
}

.page-blog__faq-list {
  margin-top: 30px;
}

details.page-blog__faq-item {
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--color-border-gold);
  overflow: hidden;
  background: var(--color-card-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

details.page-blog__faq-item summary.page-blog__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--color-text-light);
}

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

details.page-blog__faq-item summary.page-blog__faq-question:hover {
  background: var(--color-deep-red);
}

.page-blog__faq-qtext {
  flex: 1;
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--color-text-light);
}

.page-blog__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  color: var(--color-gold);
  flex-shrink: 0;
  margin-left: 15px;
  width: 30px;
  text-align: center;
  transition: transform 0.3s ease;
}

details[open] .page-blog__faq-toggle {
  transform: rotate(45deg);
}

details.page-blog__faq-item .page-blog__faq-answer {
  padding: 0 25px 20px;
  background: var(--color-deep-red);
  border-radius: 0 0 10px 10px;
  color: var(--color-text-light);
  font-size: 1rem;
}

.page-blog__faq-answer p {
  margin-bottom: 0;
  color: var(--color-text-light);
}

/* Global image styles */
.page-blog img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Mobile responsive styles */
@media (max-width: 1024px) {
  .page-blog__container {
    padding: 0 15px;
  }
  .page-blog__main-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }
  .page-blog__intro-text {
    font-size: 1.05rem;
  }
  .page-blog__section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  }
  .page-blog__sub-title {
    font-size: 1.6rem;
  }
  .page-blog__post-card img {
    
  }
  .page-blog__card-title {
    font-size: 1.2rem;
  }
  .page-blog__faq-qtext {
    font-size: 1.05rem;
  }
}

@media (max-width: 768px) {
  /* HERO Main Image */
  .page-blog__hero-section {
    padding-top: 10px; /* Force 10px padding-top */
  }
  .page-blog__hero-image img {
    object-fit: contain !important; /* Prevent cropping */
    aspect-ratio: unset !important; /* Allow natural aspect ratio */
    width: 100% !important;
    height: auto !important;
  }
  .page-blog__hero-content {
    padding: 30px 15px;
  }
  .page-blog__main-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    margin-bottom: 15px;
  }
  .page-blog__intro-text {
    font-size: 1rem;
    margin-bottom: 25px;
  }
  
  /* Blog Post Grid */
  .page-blog__post-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-blog__post-card img {
    height: 200px;
  }
  .page-blog__card-title {
    font-size: 1.1rem;
  }
  .page-blog__card-snippet {
    font-size: 0.95rem;
  }

  /* Decorative Main Title + Long text SEO Area */
  .page-blog__section-title {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
    margin-bottom: 30px;
    text-align: center;
  }
  .page-blog__sub-title {
    font-size: 1.4rem;
    margin-top: 25px;
    margin-bottom: 15px;
  }
  .page-blog__article-body p {
    font-size: 1rem;
    text-align: left;
  }
  .page-blog__article-body, .page-blog__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px !important;
    padding-right: 15px !important;
    overflow-x: hidden;
  }

  /* General Images and Containers */
  .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;
    overflow-x: hidden; /* Ensure no horizontal scroll */
  }

  /* Buttons and Button Containers */
  .page-blog__cta-button,
  .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 15px !important;
    font-size: 1rem !important;
  }
  .page-blog__cta-buttons,
  .page-blog__button-group,
  .page-blog__btn-container,
  .page-blog__view-all-button-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden;
    display: flex;
    flex-direction: column; /* Stack buttons vertically */
    gap: 15px;
  }

  /* FAQ Section */
  details.page-blog__faq-item summary.page-blog__faq-question {
    padding: 15px 20px;
  }
  .page-blog__faq-qtext {
    font-size: 1rem;
  }
  .page-blog__faq-toggle {
    font-size: 24px;
    width: 24px;
  }
  details.page-blog__faq-item .page-blog__faq-answer {
    padding: 0 20px 15px;
  }
  .page-blog__faq-answer p {
    font-size: 0.95rem;
  }
}

/* Color Contrast Adjustments */
/* Assuming default body background is light or transparent, main text is dark */
.page-blog {
  color: var(--color-text-light); /* Main page text on dark background */
  background-color: var(--color-background-main);
}

.page-blog__dark-section {
  background-color: var(--color-background-main);
  color: var(--color-text-light);
}

.page-blog__card {
  background-color: var(--color-card-bg);
  color: var(--color-text-light);
}

.page-blog__cta-button {
  background: var(--color-button-gradient);
  color: var(--color-deep-red); /* Deep red text on gold button for contrast */
}

.page-blog__cta-button--secondary {
  background: var(--color-deep-red);
  color: var(--color-text-light);
  border: 1px solid var(--color-border-gold);
}

.page-blog__cta-button:hover {
  opacity: 0.9;
}

/* Ensure all text within sections is readable */
.page-blog__section p, .page-blog__section li {
  color: var(--color-text-light);
}

/* Specific titles for light text on dark background */
.page-blog__section-title--light, .page-blog__sub-title--light, .page-blog__text-light {
  color: var(--color-text-light);
}

/* Fallback for general text if no specific background */
.page-blog__article-body {
  background-color: var(--color-background-main);
  color: var(--color-text-light);
}

/* Ensure links within text are visible */
.page-blog__article-body a {
  color: var(--color-gold);
  text-decoration: underline;
}

.page-blog__article-body a:hover {
  color: var(--color-glow);
}

/* No CSS filter on images */
.page-blog img {
  filter: none; /* Ensure no filter is applied */
}