/* ==========================================================================
   CyberGuard - Technical Article Reading CSS
   Design: Security Brief Article Layout
   ========================================================================== */

.article-page {
  background-color: var(--bg-page);
}

.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

/* Breadcrumbs */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb a {
  color: var(--brand-cyan);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--border-dark);
}

/* Article Header */
.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
}

.doc-classification {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--brand-cyan);
  background: var(--bg-highlight);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.article-title {
  font-size: 2.25rem;
  line-height: 1.3;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

.article-meta-bar span strong {
  color: var(--text-main);
}

/* Lead In Summary Box */
.article-lead {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--brand-cyan);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 36px;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-main);
}

/* Table of Contents */
.toc-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin-bottom: 40px;
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-list a {
  font-size: 0.9375rem;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toc-list a:hover {
  color: var(--brand-cyan);
  transform: translateX(4px);
}

.toc-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--brand-cyan);
  font-weight: 600;
}

/* Article Typography */
.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #24333A;
}

.article-content h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
  margin: 48px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.article-content h2 .h2-badge {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--brand-cyan);
  background: var(--bg-highlight);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 28px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
  margin: 16px 0 24px 24px;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 8px;
}

/* Callout Alert Boxes */
.callout {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--brand-cyan);
  padding: 18px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 28px 0;
  font-size: 0.95rem;
  line-height: 1.7;
}

.callout.warning {
  border-left-color: #D9822B;
  background: #FFFDF8;
}

.callout.info {
  border-left-color: var(--brand-cyan);
  background: #F8FCFD;
}

.callout-title {
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
}

/* Technical Tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.brief-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.90625rem;
  text-align: left;
}

.brief-table th {
  background: var(--bg-alt);
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

.brief-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: top;
}

.brief-table tr:last-child td {
  border-bottom: none;
}

.brief-table tr:hover td {
  background-color: #FAFCFA;
}

/* Code & Template Blocks */
pre.code-block {
  background: #131E23;
  color: #E2ECEF;
  padding: 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.84375rem;
  line-height: 1.6;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid #23343C;
  position: relative;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-alt);
  color: var(--brand-cyan);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

pre.code-block code {
  background: none;
  border: none;
  color: inherit;
  padding: 0;
}

/* Copy button for template */
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #23343C;
  color: #A0B3BC;
  border: 1px solid #374E5A;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.copy-btn:hover {
  background: var(--brand-cyan);
  color: #FFFFFF;
}

/* Article FAQ block */
.article-faq {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 28px 24px;
  margin: 40px 0;
}

.article-faq h3 {
  font-size: 1.35rem;
  margin-top: 0;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.article-faq-item {
  margin-bottom: 20px;
}

.article-faq-item:last-child {
  margin-bottom: 0;
}

.article-faq-item h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.article-faq-item p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Article Conclusion */
.article-conclusion {
  background: var(--bg-highlight);
  border: 1px solid #D5E4E6;
  border-radius: var(--radius-sm);
  padding: 24px;
  margin: 40px 0 28px;
}

.article-conclusion h3 {
  font-size: 1.25rem;
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--text-main);
}

/* User Registration CTA Action */
.article-reg-box {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 32px 0 36px;
  text-align: center;
}

.btn-user-register {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--brand-cyan);
  color: #FFFFFF !important;
  font-size: 1.0625rem;
  font-weight: 700;
  padding: 12px 36px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: 0 2px 10px rgba(8, 127, 140, 0.22);
  transition: all var(--transition);
  letter-spacing: 0.5px;
}

.btn-user-register:hover {
  background: var(--brand-cyan-dark);
  color: #FFFFFF !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(8, 127, 140, 0.32);
}

.btn-user-register .btn-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2.2;
}

/* Article Footer Bar */
.article-footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 2px solid var(--border-color);
  padding-top: 24px;
  margin-top: 48px;
}

/* Responsive */
@media (max-width: 768px) {
  .btn-user-register {
    width: 100%;
    padding: 12px 20px;
  }
  .article-title {
    font-size: 1.75rem;
  }
  .article-content {
    font-size: 1rem;
  }
  .article-container {
    padding: 20px 14px 60px;
  }
}

/* Accessibility: Support prefers-reduced-motion for Core Web Vitals & Crawlers */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}