/* ===================================================================
   SORENTIX EDITORIAL BLOG DESIGN SYSTEM
   Theme: Obsidian Deep Tech / Sovereign GRC
   Typography: Outfit (Headings) + Inter (Body)
   =================================================================== */

:root {
  --bg-main: #050816;
  --bg-card: rgba(15, 23, 42, 0.65);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(59, 130, 246, 0.3);
  
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-cyan: #06b6d4;
  --color-emerald: #10b981;
  --color-amber: #f59e0b;
  --color-rose: #f43f5e;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --max-w-content: 840px;
  --max-w-page: 1200px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
    linear-gradient(rgba(59, 130, 246, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #334155;
}

/* ===================================================================
   READING PROGRESS BAR
   =================================================================== */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-cyan));
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* ===================================================================
   NAVIGATION & HEADER
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(5, 8, 22, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color 0.2s ease;
}

.header-container {
  max-width: var(--max-w-page);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-symbol {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  color: #ffffff;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #60a5fa;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-cta {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff !important;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.5);
}

/* ===================================================================
   HERO / SEARCH SECTION
   =================================================================== */
.hero-section {
  max-width: var(--max-w-page);
  margin: 3rem auto 2rem auto;
  padding: 0 1.5rem;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  font-size: 0.8rem;
  font-weight: 600;
  color: #93c5fd;
  margin-bottom: 1.5rem;
}

.hero-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-emerald);
  box-shadow: 0 0 8px var(--color-emerald);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 30%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  max-width: 680px;
  margin: 0 auto 2rem auto;
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.6;
}

.search-container {
  max-width: 580px;
  margin: 0 auto 2.5rem auto;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 1rem 1.25rem 1rem 3rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 18px;
  height: 18px;
  pointer-events: none;
}

.category-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.filter-btn {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.45rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover, .filter-btn.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--color-primary);
  color: #ffffff;
}

/* ===================================================================
   ARTICLES GRID (HOMEPAGE)
   =================================================================== */
.articles-section {
  max-width: var(--max-w-page);
  margin: 0 auto 5rem auto;
  padding: 0 1.5rem;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.75rem;
}

.article-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(59, 130, 246, 0.1);
}

.card-top {
  margin-bottom: 1rem;
}

.card-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.card-category-badge {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: #93c5fd;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.article-card:hover .card-title {
  color: #93c5fd;
}

.card-excerpt {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card-author {
  font-weight: 500;
}

.read-link {
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* ===================================================================
   SINGLE POST LAYOUT
   =================================================================== */
.post-layout {
  max-width: var(--max-w-content);
  margin: 2.5rem auto 6rem auto;
  padding: 0 1.5rem;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb-nav a:hover {
  color: var(--color-primary);
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.post-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 2rem;
}

.post-category-tag {
  display: inline-block;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
  padding: 0.3rem 0.8rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.post-main-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
  color: #ffffff;
}

.post-subtitle {
  font-size: 1.2rem;
  color: #94a3b8;
  line-height: 1.55;
  margin-bottom: 1.75rem;
}

.post-meta-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.meta-highlight {
  color: var(--text-primary);
  font-weight: 500;
}

/* Executive Summary Box */
.executive-summary-box {
  background: rgba(30, 58, 138, 0.2);
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-left: 4px solid var(--color-primary);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0 2.5rem 0;
}

.summary-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #93c5fd;
  margin-bottom: 0.75rem;
}

.executive-summary-box p {
  color: #e2e8f0;
  font-size: 1rem;
  line-height: 1.65;
}

/* Key Takeaways Box */
.takeaways-box {
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 12px;
  padding: 1.75rem;
  margin: 2rem 0 2.5rem 0;
}

.takeaways-header {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: #6ee7b7;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.takeaways-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.takeaways-list li {
  position: relative;
  padding-left: 1.5rem;
  color: #cbd5e1;
  font-size: 0.95rem;
  line-height: 1.55;
}

.takeaways-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-emerald);
  font-weight: bold;
}

/* Article Body Typography */
.article-body {
  color: #cbd5e1;
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-body .lead {
  font-size: 1.2rem;
  line-height: 1.65;
  color: #e2e8f0;
  margin-bottom: 1.75rem;
  font-weight: 400;
}

.article-body h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin: 3rem 0 1.25rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-body h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  color: #f1f5f9;
  margin: 2rem 0 0.85rem 0;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body ul, .article-body ol {
  margin: 1.25rem 0 1.75rem 1.5rem;
}

.article-body li {
  margin-bottom: 0.6rem;
}

.article-body blockquote {
  background: rgba(15, 23, 42, 0.6);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 10px 10px 0;
  padding: 1.25rem 1.75rem;
  margin: 2rem 0;
  font-style: italic;
  color: #e2e8f0;
  font-size: 1.05rem;
}

.article-body blockquote cite {
  display: block;
  margin-top: 0.75rem;
  font-style: normal;
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Callout Box */
.callout-box {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0;
}

.callout-box h4 {
  font-family: var(--font-heading);
  color: #60a5fa;
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

/* Comparison Tables */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2.25rem 0;
  font-size: 0.95rem;
  background: rgba(15, 23, 42, 0.4);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.comparison-table th {
  background: rgba(30, 41, 59, 0.7);
  padding: 0.9rem 1.2rem;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 600;
  color: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table td {
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: #cbd5e1;
  vertical-align: top;
}

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

/* Comparison Grids / Theme Grids */
.comparison-grid, .theme-grid, .pillar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.comparison-card, .theme-card, .pillar-card {
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.5rem;
}

.comparison-card h3, .theme-card h3, .pillar-card h3 {
  margin-top: 0;
}

.badge-notice {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 0.75rem;
  margin-top: 1rem;
}

/* Numbered Steps */
.numbered-steps {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 2rem 0;
}

.step-item {
  display: flex;
  gap: 1.25rem;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.25rem;
}

.step-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-body h4 {
  font-family: var(--font-heading);
  color: #f8fafc;
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.step-body p {
  margin-bottom: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Timeline box */
.timeline-box {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}

.timeline-entry {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.timeline-badge {
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

.timeline-badge.urgent {
  background: rgba(244, 63, 94, 0.15);
  border: 1px solid rgba(244, 63, 94, 0.35);
  color: #fda4af;
}

.timeline-badge.warning {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fde68a;
}

.timeline-badge.info {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #93c5fd;
}

/* Status Badges */
.badge-urgent, .badge-warning, .badge-info, .badge-success {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-urgent { background: rgba(244, 63, 94, 0.2); color: #f43f5e; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }
.badge-info { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.badge-success { background: rgba(16, 185, 129, 0.2); color: #10b981; }

/* ===================================================================
   LEAD GENERATION CTA
   =================================================================== */
.lead-cta-card {
  background: radial-gradient(ellipse 100% 120% at 50% 0%, rgba(37, 99, 235, 0.25), rgba(15, 23, 42, 0.8));
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  text-align: center;
  margin: 3.5rem 0 2rem 0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(37, 99, 235, 0.15);
}

.lead-cta-card h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.lead-cta-card p {
  max-width: 600px;
  margin: 0 auto 1.75rem auto;
  color: #cbd5e1;
  font-size: 1.05rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 1.85rem;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
}

/* ===================================================================
   FOOTER
   =================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: rgba(5, 8, 22, 0.95);
  padding: 4rem 1.5rem 2rem 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: var(--max-w-page);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.75rem;
  max-width: 380px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #ffffff;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  max-width: var(--max-w-page);
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .header-container {
    padding: 0.75rem 1rem;
  }
  .nav-links {
    gap: 0.75rem;
  }
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}