/* ==========================================================================
   NEXUSGID.COM — OFFICIAL NEXUS MARKET DARK CRIMSON DESIGN SYSTEM
   Exact Colors Extracted from Nexus Interface:
   Ambient Glow: #7A2228 / #3B181B | Base: #141215
   Card Surface: #242126 | Insets: #19171C | Accent Red: #FB5350
   Typography: IBM Plex Serif (Headlines) + DM Sans (Body) + Space Mono (Code)
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400..700;1,9..40,400..700&family=IBM+Plex+Serif:ital,wght@0,600;0,700;1,400&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap");

:root {
  /* Exact Colors from Nexus Interface */
  --bg-primary: #141215;
  --bg-surface: #242126;
  --bg-elevated: #2C292E;
  --bg-inset: #19171C;

  --text-primary: #F3F2F4;
  --text-secondary: #A5A1A8;
  --text-tertiary: #767279;
  --text-inverse: #141215;

  /* Official Nexus Red Accent */
  --accent-primary: #C93B39;
  --accent-hover: #D94543;
  --accent-muted: rgba(201, 59, 57, 0.12);
  --accent-subtle: rgba(201, 59, 57, 0.05);

  --cat-market: #FB5350;
  --cat-guide: #3D8B8B;
  --cat-learn: #A580E2;
  --cat-forum: #5A8F5A;

  --color-success: #4ADE80;
  --color-warning: #F59E0B;
  --color-danger: #FB5350;
  --color-info: #60A5FA;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(201, 59, 57, 0.25);

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.06);

  --font-sans: "DM Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: "IBM Plex Serif", Georgia, Cambria, "Times New Roman", serif;
  --font-mono: "Space Mono", "Courier New", monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;

  --container-default: 1120px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-card: 16px;

  --duration-fast: 0.15s;
  --duration-normal: 0.25s;
  --ease-default: cubic-bezier(0.25, 0.1, 0.25, 1);

  --z-nav: 100;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  /* Nexus Ambient Crimson Radial Glow */
  background-image: 
    radial-gradient(ellipse 950px 550px at 12% 14%, rgba(120, 36, 40, 0.45) 0%, rgba(59, 24, 27, 0.22) 45%, transparent 75%),
    radial-gradient(ellipse 600px 450px at 90% 80%, rgba(65, 22, 26, 0.16) 0%, transparent 65%);
  background-attachment: fixed;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

a:hover {
  color: var(--accent-primary);
}

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

.container {
  width: 100%;
  max-width: var(--container-default);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ==========================================================================
   TOP NOTICE BAR
   ========================================================================== */
.notice-bar {
  background: rgba(18, 16, 20, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  padding: 7px 0;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.notice-content {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  text-align: center;
  flex-wrap: wrap;
}

.notice-badge {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: var(--accent-muted);
  color: var(--accent-primary);
  border: 1px solid rgba(251, 83, 80, 0.3);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(24, 21, 26, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 0 rgba(251, 83, 80, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  gap: var(--space-md);
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-brand-logo {
  height: 38px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: all var(--duration-fast) var(--ease-default);
}

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

.nav-link.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 7px 15px;
  background: var(--accent-primary);
  color: #ffffff !important;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-default);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.nav-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ==========================================================================
   BREADCRUMBS
   ========================================================================== */
.breadcrumbs {
  padding: var(--space-lg) 0 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.breadcrumb-link:hover {
  color: var(--accent-primary);
}

.breadcrumb-sep {
  color: var(--text-tertiary);
}

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

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  padding: var(--space-xl) 0 var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-label::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-primary);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.1rem, 3.8vw, 3rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  background: linear-gradient(180deg, #FFFFFF 0%, rgba(243, 242, 244, 0.8) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  max-width: 860px;
  margin-bottom: var(--space-sm);
}

.hero-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin-top: var(--space-sm);
  line-height: 1.6;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-tertiary);
  margin-top: var(--space-md);
}

/* TorWiki Badges in Nexus Palette */
.badge-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: var(--space-md) 0 var(--space-lg);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
}

.badge--secure {
  border-color: rgba(74, 222, 128, 0.4);
  color: var(--color-success);
  background: rgba(74, 222, 128, 0.06);
}

.badge--cur-b {
  border-color: rgba(242, 104, 34, 0.4);
  color: #f26822;
  background: rgba(242, 104, 34, 0.06);
} /* XMR */

.badge--cur-a {
  border-color: rgba(247, 147, 26, 0.4);
  color: #f7931a;
  background: rgba(247, 147, 26, 0.06);
} /* BTC */

.badge--enc {
  border-color: rgba(251, 83, 80, 0.4);
  color: var(--accent-primary);
  background: rgba(251, 83, 80, 0.06);
} /* PGP */

.badge--2fa {
  border-color: rgba(61, 139, 139, 0.4);
  color: var(--cat-guide);
  background: rgba(61, 139, 139, 0.06);
} /* 2FA */

/* Edition stamp */
.edition-stamp {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-sm) 0;
  margin-top: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.verified-stamp {
  color: var(--color-success);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
}

.verified-stamp::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--color-success);
}

.curated-label {
  color: var(--text-tertiary);
}

/* ==========================================================================
   HERO BAR (Onion Link Bar)
   ========================================================================== */
.hero-bar {
  background: var(--bg-inset);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-md) 0;
}

.hero-bar-inner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
}

.hero-bar-label {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-primary);
  padding: 6px 10px;
  border: 1px solid rgba(251, 83, 80, 0.3);
  border-radius: var(--radius-sm);
  background: rgba(251, 83, 80, 0.08);
  margin-top: 2px;
}

.hero-bar-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.hero-bar-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
}

.hero-bar-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-tertiary);
  width: 20px;
}

.hero-bar-addr {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-primary);
  word-break: break-all;
  flex: 1;
  user-select: all;
}

.hero-bar-addr:hover {
  color: var(--accent-primary);
}

.btn-copy {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-default);
  white-space: nowrap;
}

.btn-copy:hover {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text-primary);
  background: #2B2830;
}

.btn-copy.copied {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #ffffff;
}

/* ==========================================================================
   2-COLUMN ARTICLE LAYOUT WITH STICKY TOC
   ========================================================================== */
.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  max-width: var(--container-default);
  margin: 0 auto;
  padding: var(--space-xl) 0 var(--space-3xl);
}

.article-layout--with-toc {
  grid-template-columns: 1fr 260px;
}

.article-body {
  min-width: 0;
}

.toc-sidebar {
  position: sticky;
  top: 80px;
  height: fit-content;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  background: rgba(36, 33, 38, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-sm);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-link {
  display: block;
  padding: 4px 0;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  text-decoration: none;
  line-height: 1.45;
  border-left: 2px solid transparent;
  padding-left: 8px;
  transition: all var(--duration-fast) var(--ease-default);
}

.toc-link:hover, .toc-link.active {
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
}

/* ==========================================================================
   SPEC & MIRROR DATA TABLE
   ========================================================================== */
.data-table-wrap {
  margin: var(--space-lg) 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--bg-surface);
  box-shadow: var(--shadow-card);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table thead {
  background: var(--bg-inset);
}

.data-table th {
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border-default);
}

.data-table td {
  padding: 14px 18px;
  font-size: 0.9375rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.5;
}

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

.data-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}

.status-dot--active {
  background: var(--color-success);
  box-shadow: 0 0 6px rgba(74, 222, 128, 0.6);
}

/* ==========================================================================
   CALLOUT BOX & DIRECT ANSWER
   ========================================================================== */
.callout-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-left: 3px solid var(--accent-primary);
  padding: var(--space-lg);
  border-radius: var(--radius-card);
  margin: var(--space-lg) 0;
  box-shadow: var(--shadow-card);
}

.callout-title {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-title svg {
  color: var(--accent-primary);
}

.callout-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   PROSE / EDITORIAL STYLES
   ========================================================================== */
.prose {
  color: var(--text-secondary);
  font-size: 0.975rem;
  line-height: 1.75;
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-2xl) 0 var(--space-md);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
  letter-spacing: -0.015em;
}

.prose h3 {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin: var(--space-xl) 0 var(--space-sm);
}

.prose p {
  margin-bottom: var(--space-md);
}

.prose ul, .prose ol {
  margin: 0 0 var(--space-lg) 20px;
}

.prose li {
  margin-bottom: 6px;
}

.prose strong {
  color: #ffffff;
}

.prose blockquote {
  border-left: 2px solid var(--accent-primary);
  background: rgba(251, 83, 80, 0.05);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-primary);
}

.prose pre {
  background: var(--bg-inset);
  border: 1px solid var(--border-default);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--space-md) 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #fca5a5;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-inset);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  color: #fca5a5;
}

.hub-link {
  color: var(--accent-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.hub-link:hover {
  color: var(--accent-hover);
}

/* ==========================================================================
   FEATURE CARDS GRID (TorWiki Guide Cards)
   ========================================================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.guide-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast) var(--ease-default);
}

.guide-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.guide-card-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--accent-muted);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.guide-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.guide-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   FAQ ACCORDIONS
   ========================================================================== */
.faq-wrap {
  margin: var(--space-lg) 0;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-item.open {
  border-color: var(--border-default);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.faq-arrow {
  color: var(--accent-primary);
  transition: transform var(--duration-fast) var(--ease-default);
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 18px 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ==========================================================================
   CTA HUB BLOCK
   ========================================================================== */
.cta-hub-block {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: var(--space-xl) var(--space-lg);
  border-radius: var(--radius-card);
  text-align: center;
  margin: var(--space-2xl) 0;
  box-shadow: var(--shadow-card);
}

.cta-title {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.cta-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto var(--space-lg);
}

.cta-btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-primary);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-default);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-default);
}

.btn-secondary:hover {
  background: var(--bg-surface);
  border-color: var(--border-strong);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-2xl) 0 var(--space-lg);
  font-size: 0.8125rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-desc {
  color: var(--text-secondary);
  margin-top: 10px;
  max-width: 320px;
  line-height: 1.55;
  font-size: 0.8125rem;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 6px;
}

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

.footer-link:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 960px) {
  .article-layout--with-toc {
    grid-template-columns: 1fr;
  }
  .toc-sidebar {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .hero-bar-inner {
    flex-direction: column;
    gap: var(--space-sm);
  }
  .hero-bar-row {
    flex-wrap: wrap;
  }
  .nav-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 10px 0;
  }
  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    gap: 14px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Screenshot Visual Frame */
.screenshot-frame {
  margin: var(--space-xl) 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  box-shadow: var(--shadow-card);
  transition: border-color var(--duration-fast) var(--ease-default);
}

.screenshot-frame:hover {
  border-color: var(--border-strong);
}

.screenshot-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-bottom: 1px solid var(--border-subtle);
}

.screenshot-frame figcaption {
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-inset);
  line-height: 1.5;
}