/* ==========================================================================
   Astra Chronicle | The Frontier AI Journal & Developer Lab (chatgpt6astra.store)
   Design System: World-Class Frontier AI Research, Dark Glassmorphism & Editorial
   Typography: Newsreader (Editorial Serif) + Plus Jakarta Sans + JetBrains Mono
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,400;1,6..72,600&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Ultra-Premium Dark Tech Theme */
  --bg-page: #080a10;
  --bg-surface: #0f131f;
  --bg-elevated: #161c2c;
  --bg-highlight: #1e263c;
  --bg-card: #101524;
  --bg-card-hover: #171d32;

  /* Glassmorphism & Frosted Layers */
  --glass-bg: rgba(15, 19, 31, 0.75);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-hover: rgba(255, 255, 255, 0.12);

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.13);
  --border-strong: rgba(255, 255, 255, 0.22);
  --border-glow: rgba(99, 102, 241, 0.35);

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;
  --text-light: #e2e8f0;

  /* Editorial Accents */
  --accent-primary: #6366f1;       /* Electric Indigo */
  --accent-primary-hover: #4f46e5;
  --accent-primary-light: #818cf8;
  --accent-cyan: #06b6d4;          /* Cyber Cyan */
  --accent-emerald: #10b981;       /* Verified Green */
  --accent-emerald-bg: rgba(16, 185, 129, 0.1);
  --accent-breaking: #f43f5e;      /* Alert Rose */
  --accent-amber: #f59e0b;         /* Warm Amber */

  /* Typography */
  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, monospace;

  /* Wide Layout Dimensions */
  --max-width: 1380px;
  --max-content: 920px;
  --max-wide-content: 1100px;
  
  /* Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Global Reset & Base Setup
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg-page);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 90% 20%, rgba(6, 182, 212, 0.08), transparent);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Modern Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: #080a10;
}
::-webkit-scrollbar-thumb {
  background: #1e263c;
  border-radius: 5px;
  border: 2px solid #080a10;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

code, pre, kbd {
  font-family: var(--font-mono);
}

/* Container Utility */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(16px, 3.5vw, 40px);
}

.container-reading {
  width: 100%;
  max-width: var(--max-content);
  margin-inline: auto;
  padding-inline: clamp(16px, 2.5vw, 32px);
}

/* ==========================================================================
   Top Announcement & Meta Bar
   ========================================================================== */
.top-meta-bar {
  background: rgba(7, 8, 14, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  padding-block: 10px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.top-meta-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.trending-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: var(--text-light);
}

.breaking-badge {
  background: linear-gradient(135deg, var(--accent-breaking), #e11d48);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  box-shadow: 0 0 12px rgba(244, 63, 94, 0.4);
}

.breaking-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  animation: pulse-dot 1.5s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ==========================================================================
   Main Masthead / Header
   ========================================================================== */
.main-masthead {
  padding-block: 32px 24px;
  border-bottom: 1px solid var(--border-subtle);
  text-align: center;
  background: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08), transparent 70%);
}

.masthead-date {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: 600;
}

.journal-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.journal-title a {
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.journal-title a:hover {
  filter: drop-shadow(0 0 16px rgba(99, 102, 241, 0.35));
}

.journal-tagline {
  font-size: clamp(0.85rem, 1.4vw, 1.02rem);
  color: var(--text-secondary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
  max-width: 840px;
  margin-inline: auto;
}

/* ==========================================================================
   Editorial Navigation Bar (Sticky Glassmorphic)
   ========================================================================== */
.editorial-nav, .primary-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(8, 10, 16, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-row, .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  position: relative;
}

.nav-brand-mini {
  display: none;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 28px);
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-link, .nav-links a {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-block: 16px;
  position: relative;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-link:hover, .nav-links a:hover {
  color: #fff;
}

.nav-link.active, .nav-links a.active {
  color: #fff;
  font-weight: 700;
}

.nav-link.active::after, .nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));
  box-shadow: 0 0 8px var(--accent-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-subscribe-btn {
  background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
  color: #ffffff !important;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
  white-space: nowrap;
  transition: var(--transition);
}

.nav-subscribe-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.55);
  background: linear-gradient(135deg, #7174fa, #4338ca);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  color: var(--text-primary);
  font-size: 1.4rem;
  padding: 6px 10px;
  cursor: pointer;
  transition: var(--transition);
}

.mobile-toggle:hover {
  background: var(--bg-highlight);
  border-color: var(--accent-primary);
}

/* ==========================================================================
   Breadcrumb Component
   ========================================================================== */
.breadcrumb-nav {
  padding-block: 16px 8px;
  font-size: 0.85rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-weight: 500;
}

.breadcrumb-link {
  color: var(--text-secondary);
}

.breadcrumb-link:hover {
  color: var(--accent-primary-light);
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--border-strong);
}

.breadcrumb-current {
  color: var(--text-light);
  font-weight: 600;
}

/* ==========================================================================
   Callouts, Badges, & Highlights
   ========================================================================== */
.editorial-callout {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(6, 182, 212, 0.04));
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-left: 4px solid var(--accent-emerald);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  margin-block: 28px;
  box-shadow: var(--shadow-sm);
}

.editorial-callout.alert-warning {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(239, 68, 68, 0.04));
  border-color: rgba(245, 158, 11, 0.25);
  border-left-color: var(--accent-amber);
}

.editorial-callout.alert-indigo {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(129, 140, 248, 0.04));
  border-color: rgba(99, 102, 241, 0.25);
  border-left-color: var(--accent-primary);
}

.category-tag, .story-kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary-light);
  margin-bottom: 10px;
}

.category-tag.emerald, .story-kicker.emerald {
  color: var(--accent-emerald);
}

.category-tag.cyan {
  color: var(--accent-cyan);
}

.badge-verified {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ==========================================================================
   Editorial Layout: Hero Cover Story + Trending Sidebar (Wide Screen)
   ========================================================================== */
.editorial-layout {
  display: grid;
  grid-template-columns: 1.85fr 1fr;
  gap: clamp(24px, 3.5vw, 48px);
  padding-block: 28px 48px;
  align-items: start;
}

.lead-story {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(22px, 3vw, 36px);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.lead-story:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.lead-headline {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 3.2vw, 2.75rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.lead-headline a {
  color: var(--text-primary);
}

.lead-headline a:hover {
  color: var(--accent-primary-light);
}

.lead-deck {
  font-size: clamp(1rem, 1.2vw, 1.12rem);
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 22px;
}

.lead-image-box {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-medium);
  margin-bottom: 20px;
  background: #000;
  position: relative;
}

.lead-image-box img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.lead-image-box:hover img {
  transform: scale(1.02);
}

.byline-row {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.84rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.byline-author {
  font-weight: 600;
  color: var(--text-light);
}

/* Trending Sidebar */
.trending-sidebar, .sidebar-column {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(20px, 2.5vw, 30px);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.sidebar-header {
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  padding-bottom: 14px;
  border-bottom: 2px solid var(--accent-primary);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.trending-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.trending-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.trending-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.trending-item:hover {
  transform: translateX(4px);
}

.trending-num {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--border-strong);
  line-height: 1;
  min-width: 28px;
}

.trending-content h3, .trending-content h4 {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
}

.trending-content h3 a:hover, .trending-content h4 a:hover {
  color: var(--accent-primary-light);
}

.trending-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Editorial Feed & Article Cards (Wide Grid)
   ========================================================================== */
.section-headline {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 2.5vw, 2.3rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.5vw, 32px);
  margin-bottom: 60px;
}

.editorial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(18px, 2vw, 26px);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.editorial-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.card-image-box {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  overflow: hidden;
  margin-bottom: 18px;
}

.card-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.editorial-card:hover .card-image-box img {
  transform: scale(1.04);
}

.card-category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent-primary-light);
  margin-bottom: 8px;
}

.card-title {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 1.4vw, 1.35rem);
  font-weight: 700;
  line-height: 1.32;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-title a:hover {
  color: var(--accent-primary-light);
}

.card-excerpt {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   Benchmark Empirical Data Table (Clean & Modern)
   ========================================================================== */
.table-editorial-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-block: 32px;
  box-shadow: var(--shadow-sm);
}

.editorial-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  text-align: left;
}

.editorial-table th {
  background: #0a0d16;
  padding: 16px 20px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-medium);
  white-space: nowrap;
}

.editorial-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

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

.editorial-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
}

.editorial-table strong {
  color: var(--text-primary);
}

/* ==========================================================================
   Academic Research & Article Reading Layout
   ========================================================================== */
.article-reading-container {
  width: 100%;
  max-width: var(--max-wide-content);
  margin-inline: auto;
  padding-block: 28px 80px;
  padding-inline: clamp(16px, 3vw, 36px);
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-top: 12px;
  margin-bottom: 18px;
}

.article-subhead {
  font-size: clamp(1.1rem, 1.3vw, 1.26rem);
  color: var(--text-secondary);
  line-height: 1.62;
  margin-bottom: 22px;
}

/* Paper Abstract Box */
.paper-abstract {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(15, 19, 31, 0.95));
  border: 1px solid var(--border-medium);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-sm);
  padding: clamp(20px, 2.5vw, 30px);
  margin-bottom: 40px;
  font-size: 1rem;
  line-height: 1.75;
  color: #cbd5e1;
  box-shadow: var(--shadow-sm);
}

.paper-abstract strong {
  color: #fff;
  font-size: 0.95rem;
  display: block;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-sans);
}

/* Table of Contents */
.toc-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 24px 28px;
  margin-bottom: 44px;
  font-size: 0.94rem;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-link {
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.toc-link:hover {
  color: var(--accent-primary-light);
  transform: translateX(6px);
}

/* Research Paper Prose */
.article-prose {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.88;
  color: #cbd5e1;
}

.article-prose p {
  margin-bottom: 28px;
}

.article-prose h2 {
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 2.2vw, 1.85rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 52px;
  margin-bottom: 20px;
  letter-spacing: -0.015em;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 10px;
}

.article-prose h3 {
  font-family: var(--font-sans);
  font-size: clamp(1.2rem, 1.6vw, 1.4rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 36px;
  margin-bottom: 16px;
}

.article-prose blockquote {
  border-left: 3px solid var(--accent-primary);
  padding-left: 26px;
  margin-block: 36px;
  font-style: italic;
  color: #e2e8f0;
  background: rgba(99, 102, 241, 0.04);
  padding-block: 14px;
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.article-prose ul, .article-prose ol {
  margin-bottom: 30px;
  padding-left: 32px;
}

.article-prose li {
  margin-bottom: 12px;
}

.article-prose code, code {
  background: rgba(255, 255, 255, 0.08);
  color: #a5b4fc;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: var(--font-mono);
}

pre, .math-formula-box {
  background: #06080e !important;
  border: 1px solid var(--border-medium) !important;
  border-radius: var(--radius-sm) !important;
  padding: 22px 26px !important;
  margin-block: 32px;
  font-family: var(--font-mono);
  font-size: 0.94rem;
  color: #e2e8f0;
  overflow-x: auto;
  line-height: 1.65;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6);
}

/* Academic References List */
.academic-ref-list {
  list-style: decimal;
  padding-left: 26px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 26px;
}

.academic-ref-list li {
  margin-bottom: 14px;
}

.academic-ref-list a {
  color: var(--accent-primary-light);
  text-decoration: underline;
}

/* Author Profile Box */
.author-profile-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(22px, 3vw, 32px);
  margin-top: 56px;
  display: flex;
  gap: 24px;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.author-profile-avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.4rem;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

/* ==========================================================================
   Interactive Tools & Calculator Styles
   ========================================================================== */
.tool-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(24px, 3.5vw, 40px);
  margin-bottom: 40px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-control, select, input[type="text"], input[type="number"], input[type="email"], textarea {
  width: 100%;
  padding: 12px 16px;
  background: #07090f;
  color: #fff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  font-size: 0.96rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-control:focus, select:focus, input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
  background: #0a0e18;
}

.form-range {
  width: 100%;
  accent-color: var(--accent-primary);
  cursor: pointer;
  height: 6px;
  background: #1e263c;
  border-radius: 4px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: #05060a;
  border-top: 1px solid var(--border-subtle);
  padding-block: 56px 36px;
  font-size: 0.9rem;
}

.footer-top-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: clamp(24px, 3.5vw, 48px);
  margin-bottom: 48px;
}

.footer-about-col p {
  color: var(--text-secondary);
  margin-top: 14px;
  font-size: 0.92rem;
  line-height: 1.68;
  max-width: 380px;
}

.footer-col-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.footer-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link-list a {
  color: var(--text-secondary);
}

.footer-link-list a:hover {
  color: var(--accent-primary-light);
  transform: translateX(4px);
}

.footer-disclaimer-notice {
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
  text-align: center;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  border-left: 4px solid var(--accent-emerald);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: toast-slide 0.3s ease;
}

@keyframes toast-slide {
  from { transform: translateX(50px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   Responsive Adaptations & Breakpoints
   ========================================================================== */
@media (max-width: 1200px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .editorial-layout {
    grid-template-columns: 1.4fr 1fr;
    gap: 28px;
  }
}

@media (max-width: 960px) {
  .editorial-layout {
    grid-template-columns: 1fr;
  }
  .trending-sidebar {
    margin-top: 20px;
  }
  .footer-top-row {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  
  /* Mobile Navigation Drawer */
  .mobile-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 58px;
    left: 0;
    right: 0;
    width: 100%;
    background: #090c14;
    border-bottom: 1px solid var(--border-medium);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px;
    gap: 4px;
    z-index: 1005;
    max-height: 80vh;
    overflow-y: auto;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-link, .nav-links a {
    padding: 12px 14px;
    width: 100%;
    border-radius: var(--radius-xs);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }
  .nav-link:hover, .nav-links a:hover,
  .nav-link.active, .nav-links a.active {
    background: var(--bg-highlight);
  }
  .nav-link.active::after, .nav-links a.active::after {
    display: none;
  }
}

@media (max-width: 640px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .footer-top-row {
    grid-template-columns: 1fr;
  }
  .journal-title {
    font-size: 2.2rem;
  }
  .lead-story {
    padding: 18px;
  }
  .top-meta-wrapper {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}