/*
 * article-style.css — BS. Tăng Đức Cương
 * Enqueue trong functions.php:
 *   wp_enqueue_style('bc-article', get_template_directory_uri() . '/css/article-style.css', [], '1.0');
 *
 * Mobile-first: base = mobile, media query mở rộng lên desktop
 */

/* ================================================
   DESIGN TOKENS
   ================================================ */
:root {
  --bc-primary:       #048996;
  --bc-primary-dark:  #036570;
  --bc-primary-darker:#024A52;
  --bc-primary-light: #E8F8FA;
  --bc-accent:        #BFECF7;
  --bc-accent-soft:   #E8F8FA;

  --bc-dark:          #000F15;
  --bc-dark-2:        #1A2C33;
  --bc-gray-text:     #4A5C63;
  --bc-gray-light:    #788890;
  --bc-gray-bg:       #F5F8FA;
  --bc-border:        #E1E8EB;
  --bc-soft-bg:       #F0F8FA;

  --bc-radius-sm:     8px;
  --bc-radius:        12px;
  --bc-radius-lg:     16px;

  --bc-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ================================================
   RESET + BASE (chỉ scope trong bc- classes)
   ================================================ */
.bc-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ================================================
   BREADCRUMB
   ================================================ */
.bc-breadcrumb {
  background: #fff;
  border-bottom: 1px solid var(--bc-border);
  padding: 10px 0;
  font-size: 15px;
  color: var(--bc-gray-light);
  line-height: 1.4;
}
.bc-breadcrumb a {
  color: var(--bc-gray-text);
  text-decoration: none;
}
.bc-breadcrumb a:hover { color: var(--bc-primary); }
.bc-breadcrumb strong { color: var(--bc-dark); }
.bc-sep { margin: 0 6px; color: var(--bc-border); }

/* ================================================
   ARTICLE LAYOUT — Mobile: single column
   ================================================ */
.bc-article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 24px 0 48px;
}

/* ================================================
   MAIN CONTENT
   ================================================ */
.bc-article-main { min-width: 0; } /* prevent grid blowout */

/* H1 */
.bc-article-h1 {
  font-family: var(--bc-font);
  font-size: clamp(22px, 5vw, 38px);
  font-weight: 800;
  color: var(--bc-dark);
  line-height: 1.2;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

/* Meta row */
.bc-article-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 12px;
  color: var(--bc-gray-light);
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--bc-border);
}

/* Author box */
.bc-author-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bc-soft-bg);
  border-radius: var(--bc-radius);
  margin-bottom: 20px;
}
.bc-author-avatar {
  width: 60px;
  height: 60px;
  border-radius: 15px;
  background: linear-gradient(135deg, var(--bc-accent) 0%, var(--bc-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
  overflow: hidden;
}
.bc-author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.bc-author-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--bc-dark);
  font-family: var(--bc-font);
}
.bc-author-bio {
  font-size: 16px;
  color: var(--bc-gray-light);
  margin-top: 2px;
}

/* Featured image */
.bc-article-hero-img {
  border-radius: var(--bc-radius-lg);
  overflow: hidden;
  margin-bottom: 22px;
  background: linear-gradient(135deg, var(--bc-accent) 0%, var(--bc-primary) 100%);
  aspect-ratio: 16/9;
}
.bc-article-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.bc-article-hero-img figcaption {
  font-size: 11px;
  color: var(--bc-gray-light);
  text-align: center;
  padding: 6px 12px;
  background: #fff;
}

/* Summary box */
.bc-summary-box {
  background: var(--bc-accent-soft);
  border-left: 4px solid var(--bc-primary);
  border-radius: 0 var(--bc-radius) var(--bc-radius) 0;
  padding: 16px 20px;
  margin-bottom: 28px;
}
.bc-summary-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--bc-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
  font-family: var(--bc-font);
}
.bc-summary-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.bc-summary-list li {
  padding: 4px 0 4px 22px;
  position: relative;
  font-size: 14px;
  color: var(--bc-dark);
  line-height: 1.6;
  font-family: var(--bc-font);
}
.bc-summary-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--bc-primary);
  font-weight: 700;
}

/* ================================================
   ARTICLE BODY — style cho WordPress the_content()
   ================================================ */
.bc-article-body {
  font-family: var(--bc-font);
  font-size: 16px;
  color: var(--bc-gray-text);
  line-height: 1.8;
}

/* Headings trong bài */
.bc-article-body h2 {
  font-size: clamp(18px, 4vw, 24px);
  font-weight: 700;
  color: var(--bc-dark);
  margin: 32px 0 14px;
  letter-spacing: -0.3px;
  line-height: 1.3;
  font-family: var(--bc-font);
}
.bc-article-body h3 {
  font-size: clamp(16px, 3.5vw, 20px);
  font-weight: 700;
  color: var(--bc-dark-2);
  margin: 24px 0 10px;
  font-family: var(--bc-font);
}
.bc-article-body h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--bc-dark);
  margin: 20px 0 8px;
}

/* Paragraph */
.bc-article-body p {
  margin-bottom: 14px;
  font-size: 16px;
}

/* Inline strong trong p */
.bc-article-body strong { color: var(--bc-dark); font-weight: 700; }

/* Lists */
.bc-article-body ul,
.bc-article-body ol {
  padding-left: 22px;
  margin-bottom: 16px;
}
.bc-article-body li {
  margin-bottom: 6px;
  line-height: 1.7;
}

/* Blockquote → callout-quote style */
.bc-article-body blockquote {
  background: var(--bc-accent-soft);
  border-left: 4px solid var(--bc-primary);
  padding: 18px 22px;
  margin: 24px 0;
  border-radius: 0 var(--bc-radius) var(--bc-radius) 0;
  font-size: 16px;
  font-style: italic;
  color: var(--bc-dark);
  line-height: 1.6;
}
.bc-article-body blockquote cite {
  display: block;
  font-size: 12px;
  color: var(--bc-primary);
  font-weight: 600;
  margin-top: 10px;
  font-style: normal;
}

/* Images trong bài */
.bc-article-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--bc-radius);
  display: block;
  margin: 16px auto;
}
.bc-article-body figure { margin: 20px 0; }
.bc-article-body figcaption {
  font-size: 12px;
  color: var(--bc-gray-light);
  text-align: center;
  margin-top: 6px;
}

/* Tables */
.bc-article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
  overflow-x: auto;
  display: block;
}
.bc-article-body th {
  background: var(--bc-primary);
  color: #fff;
  padding: 10px 14px;
  text-align: left;
  font-weight: 700;
}
.bc-article-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--bc-border);
  vertical-align: top;
}
.bc-article-body tr:nth-child(even) td { background: var(--bc-soft-bg); }

/* ================================================
   SHORTCODE BLOCKS (khai báo trong functions.php)
   ================================================ */

/* [bc_callout] — blockquote bác sĩ */
.bc-callout-quote {
  background: var(--bc-accent-soft);
  border-left: 4px solid var(--bc-primary);
  padding: 20px 22px;
  margin: 24px 0;
  border-radius: 0 var(--bc-radius) var(--bc-radius) 0;
  font-size: 16px;
  font-style: italic;
  color: var(--bc-dark);
  line-height: 1.6;
}
.bc-callout-by {
  font-size: 13px;
  color: var(--bc-primary);
  font-weight: 600;
  margin-top: 10px;
  font-style: normal;
}

/* [bc_video] — video embed block */
.bc-video-embed {
  background: var(--bc-dark-2);
  border-radius: var(--bc-radius-lg);
  padding: 16px 18px;
  margin: 22px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s;
}
.bc-video-embed:hover { opacity: 0.9; }
.bc-video-embed-play {
  width: 44px;
  height: 44px;
  background: var(--bc-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(4,137,150,0.4);
}
.bc-video-embed-info { flex: 1; }
.bc-video-embed-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
  font-family: var(--bc-font);
}
.bc-video-embed-meta { font-size: 15px; color: rgba(255,255,255,0.6); }

/* [bc_cta] — inline CTA banner */
.bc-inline-cta {
  background: var(--bc-primary);
  color: #fff;
  padding: 22px 20px;
  border-radius: var(--bc-radius-lg);
  margin: 24px 0;
  text-align: center;
}
.bc-inline-cta strong {
  display: block;
  font-size: 16px;
  margin-bottom: 6px;
  font-family: var(--bc-font);
  color: #fff;
}
.bc-inline-cta p {
  font-size: 13px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 14px;
  line-height: 1.5;
}
.bc-inline-cta-btn {
  background: #fff;
  color: var(--bc-primary);
  padding: 10px 22px;
  border-radius: var(--bc-radius-sm);
  font-size: 13px;
  font-weight: 700;
  display: inline-block;
  text-decoration: none;
  font-family: var(--bc-font);
  transition: background 0.2s;
}
.bc-inline-cta-btn:hover { background: var(--bc-accent-soft); }

/* [bc_faq] — mini FAQ */
.bc-faq-mini {
  background: var(--bc-soft-bg);
  border-radius: var(--bc-radius-lg);
  padding: 20px;
  margin: 24px 0;
}
.bc-faq-mini-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--bc-dark);
  font-family: var(--bc-font);
}
.bc-faq-mini-item {
  border-bottom: 1px solid var(--bc-border);
}
.bc-faq-mini-item:last-child { border: none; }
.bc-faq-mini-q {
  padding: 12px 0;
  font-size: 14px;
  color: var(--bc-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-family: var(--bc-font);
  list-style: none;
  user-select: none;
}
.bc-faq-mini-q::-webkit-details-marker { display: none; }
.bc-faq-mini-q::after {
  content: '+';
  color: var(--bc-primary);
  font-size: 20px;
  font-weight: 300;
  flex-shrink: 0;
  transition: transform 0.2s;
}
details[open] .bc-faq-mini-q::after { transform: rotate(45deg); }
.bc-faq-mini-answer {
  font-size: 14px;
  color: var(--bc-gray-text);
  line-height: 1.7;
  padding-bottom: 14px;
  padding-right: 28px;
}

/* Related articles */
.bc-related-articles {
  background: var(--bc-gray-bg);
  border-radius: var(--bc-radius-lg);
  padding: 20px;
  margin-top: 28px;
}
.bc-related-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--bc-dark);
  font-family: var(--bc-font);
}
.bc-related-item {
  display: block;
  padding: 9px 0;
  font-size: 14px;
  color: var(--bc-primary);
  border-bottom: 1px solid var(--bc-border);
  text-decoration: none;
  font-weight: 500;
  font-family: var(--bc-font);
  transition: color 0.15s;
}
.bc-related-item:last-child { border: none; }
.bc-related-item:hover { color: var(--bc-primary-dark); }

/* Comments wrap */
.bc-comments-wrap {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--bc-border);
}

/* ================================================
   SIDEBAR — mobile: hiển thị sau main
   ================================================ */
.bc-article-sidebar > * + * { margin-top: 16px; }

.bc-sidebar-box {
  background: #fff;
  border: 1px solid var(--bc-border);
  border-radius: var(--bc-radius);
  padding: 16px;
}
.bc-sidebar-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--bc-gray-light);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  font-family: var(--bc-font);
}

/* TOC */
.bc-toc-nav { display: flex; flex-direction: column; }
.bc-toc-item {
  padding: 6px 0 6px 12px;
  font-size: 13px;
  color: var(--bc-gray-text);
  border-left: 2px solid transparent;
  text-decoration: none;
  display: block;
  transition: all 0.15s;
  font-family: var(--bc-font);
  line-height: 1.4;
}
.bc-toc-item:hover { color: var(--bc-primary); }
.bc-toc-item.is-active {
  color: var(--bc-primary);
  border-left-color: var(--bc-primary);
  font-weight: 600;
}
.bc-toc-item--h3 { padding-left: 24px; font-size: 12px; }

/* Hot articles */
.bc-hot-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 9px 0;
  text-decoration: none;
  border-bottom: 1px solid var(--bc-border);
}
.bc-hot-item:last-child { border: none; }
.bc-hot-num {
  color: var(--bc-primary);
  font-weight: 700;
  font-size: 14px;
  min-width: 18px;
  flex-shrink: 0;
  font-family: var(--bc-font);
}
.bc-hot-text {
  font-size: 13px;
  color: var(--bc-dark);
  line-height: 1.4;
  font-family: var(--bc-font);
  transition: color 0.15s;
}
.bc-hot-item:hover .bc-hot-text { color: var(--bc-primary); }

/* Sidebar CTA */
.bc-sidebar-cta {
  background: var(--bc-primary);
  color: #fff;
  padding: 20px;
  border-radius: var(--bc-radius);
  text-align: center;
}
.bc-sidebar-cta-icon { font-size: 28px; margin-bottom: 8px; }
.bc-sidebar-cta-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
  font-family: var(--bc-font);
}
.bc-sidebar-cta-sub {
  font-size: 12px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 14px;
  line-height: 1.4;
}
.bc-sidebar-cta-btn {
  background: #fff;
  color: var(--bc-primary);
  padding: 9px 18px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  display: inline-block;
  text-decoration: none;
  font-family: var(--bc-font);
  transition: background 0.2s;
}
.bc-sidebar-cta-btn:hover { background: var(--bc-accent-soft); }

/* ================================================
   TOC STICKY — chỉ sticky trên tablet+ 
   ================================================ */
@media (min-width: 1024px) {
  .bc-sidebar-toc {
    position: sticky;
    top: 80px; /* adjust theo header height */
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--bc-border) transparent;
  }
}

/* ================================================
   TABLET (≥ 768px) — layout 2 cột
   ================================================ */
@media (min-width: 768px) {
  .bc-container { padding: 0 24px; }

  .bc-article-layout {
    grid-template-columns: 1fr 260px;
    gap: 32px;
    padding: 32px 0 64px;
  }

  .bc-summary-box { padding: 18px 22px; }

  .bc-article-body h2 { margin: 36px 0 16px; }

  .bc-inline-cta { padding: 24px; }
  .bc-inline-cta strong { font-size: 17px; }

  .bc-video-embed { padding: 18px 22px; }
}

/* ================================================
   DESKTOP (≥ 1024px)
   ================================================ */
@media (min-width: 1024px) {
  .bc-container { padding: 0 32px; }

  .bc-article-layout {
    grid-template-columns: 1fr 280px;
    gap: 40px;
  }

  .bc-article-h1 { font-size: 38px; }
  .bc-article-meta-row { font-size: 13px; gap: 18px; }

  .bc-author-box { padding: 16px 20px; gap: 40px; }
  .bc-author-avatar { width: 230px; height: 230px; }

  .bc-summary-box { padding: 20px 24px; }
  .bc-summary-list li { font-size: 14px; }
}

/* ================================================
   MOBILE SMALL (≤ 380px)
   ================================================ */
@media (max-width: 380px) {
  .bc-article-h1 { font-size: 20px; }
  .bc-article-body { font-size: 15px; }
  .bc-article-body p { font-size: 15px; }
  .bc-inline-cta strong { font-size: 15px; }
}

/* ================================================
   ACCESSIBILITY
   ================================================ */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

:focus-visible {
  outline: 2px solid var(--bc-primary);
  outline-offset: 2px;
  border-radius: 2px;
}