/* ==========================================================================
   Emad Jumaah — Systems Architect & AI Research Portal
   Modern Glassmorphic Dark/Light Engineering Design System
   ========================================================================== */

:root,
[data-theme="light"] {
  --bg-canvas: #f8fafc;
  --bg-surface: #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-glass: rgba(248, 250, 252, 0.88);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #475569;
  --text-faint: #64748b;

  --accent-primary: #059669;
  --accent-primary-hover: #047857;
  --accent-cyan: #0284c7;
  --accent-amber: #d97706;
  --accent-violet: #6d28d9;

  --border-subtle: #e2e8f0;
  --border-strong: #94a3b8;
  --border-accent: rgba(5, 150, 105, 0.38);

  --shadow-card: 0 8px 24px -8px rgba(15, 23, 42, 0.07), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 12px 28px -8px rgba(5, 150, 105, 0.14);
}

[data-theme="dark"] {
  --bg-canvas: #080c14;
  --bg-surface: #0e1524;
  --bg-elevated: rgba(18, 26, 43, 0.82);
  --bg-card-hover: rgba(24, 35, 58, 0.95);
  --bg-subtle: rgba(15, 23, 42, 0.65);
  --bg-glass: rgba(8, 12, 20, 0.84);

  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-faint: #64748b;

  --accent-primary: #10b981;
  --accent-primary-hover: #34d399;
  --accent-cyan: #38bdf8;
  --accent-amber: #f59e0b;
  --accent-violet: #a78bfa;

  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(56, 189, 248, 0.35);
  --border-accent: rgba(16, 185, 129, 0.4);

  --shadow-card: 0 12px 32px -12px rgba(0, 0, 0, 0.6), inset 0 1px 0 0 rgba(255, 255, 255, 0.06);
  --shadow-glow: 0 0 36px -8px rgba(16, 185, 129, 0.22);
}

:root {
  --header-h: 4.25rem;
  --anchor-offset: 6rem;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-display-ar: 'Readex Pro', 'IBM Plex Sans Arabic', system-ui, sans-serif;
  --font-sans-ar: 'IBM Plex Sans Arabic', system-ui, sans-serif;
  --font-serif-ar: 'Amiri', Georgia, serif;
  --font-sans-en: 'Inter', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--anchor-offset);
  scroll-padding-block-start: var(--anchor-offset);
  -webkit-text-size-adjust: 100%;
}

[id],
section[id],
article[id],
div[id],
h1[id],
h2[id],
h3[id],
:target {
  scroll-margin-top: var(--anchor-offset);
  scroll-margin-block-start: var(--anchor-offset);
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans-ar);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color 0.2s ease, color 0.2s ease;
}

html[lang="en"] body {
  font-family: var(--font-sans-en);
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

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

.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 3.5vw, 2.5rem);
}

/* Sticky Glass Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-glyph {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: #041014;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  direction: ltr;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(16, 185, 129, 0.3);
}

.brand-glyph-sm {
  width: 1.9rem;
  height: 1.9rem;
  font-size: 0.78rem;
}

.brand-meta {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  font-family: var(--font-display-ar);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-primary);
}

html[lang="en"] .brand-name {
  font-family: var(--font-sans-en);
  letter-spacing: -0.01em;
}

.brand-role {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-link {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--accent-primary);
  background: rgba(16, 185, 129, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.md-pill {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 0.28rem 0.55rem;
  border-radius: var(--radius-sm);
}

.md-pill:hover {
  background: rgba(56, 189, 248, 0.2);
}

.theme-toggle {
  width: 2.15rem;
  height: 2.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }

.lang-switch {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.lang-switch:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Architect Hero & Telemetry Strip */
.hero-section {
  position: relative;
  padding-block: clamp(2.25rem, 5vw, 4rem) clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border-subtle);
  background-image:
    radial-gradient(circle at 80% 15%, rgba(16, 185, 129, 0.10), transparent 40%),
    radial-gradient(circle at 15% 80%, rgba(56, 189, 248, 0.08), transparent 40%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr;
  gap: clamp(1.75rem, 3.5vw, 3rem);
  align-items: center;
}

.architect-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.32rem 0.8rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border-accent);
  margin-bottom: 1.15rem;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 8px var(--accent-primary);
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--accent-primary);
  letter-spacing: 0.03em;
}

.hero-title {
  font-family: var(--font-display-ar);
  font-size: clamp(1.75rem, 3.2vw, 2.65rem);
  font-weight: 700;
  line-height: 1.32;
  margin-bottom: 1.1rem;
  color: var(--text-primary);
}

html[lang="en"] .hero-title {
  font-family: var(--font-sans-en);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.text-gradient {
  background: linear-gradient(125deg, var(--accent-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: clamp(1rem, 1.2vw, 1.12rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  max-width: 62ch;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  color: #04120e;
  font-weight: 600;
  font-size: 0.9rem;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.88rem;
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.spotlight-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.spotlight-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
}

.spotlight-img-wrap {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #05080f;
}

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

.spotlight-card:hover .spotlight-img {
  transform: scale(1.02);
}

.spotlight-body {
  padding: 1.1rem 1.2rem;
}

.spotlight-title {
  font-family: var(--font-display-ar);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.45rem;
}

html[lang="en"] .spotlight-title {
  font-family: var(--font-sans-en);
}

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

.spotlight-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.9rem;
}

.spotlight-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

.btn-ghost-sm {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.ext-pill {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}

.ext-pill:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.telemetry-bar {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
}

.telemetry-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.telemetry-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.telemetry-val {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-primary);
  direction: ltr;
  text-align: start;
}

.telemetry-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Section Scaffolding & Pills */
.section-block {
  padding-block: clamp(3rem, 5.5vw, 4.75rem);
  border-bottom: 1px solid var(--border-subtle);
}

.section-alt {
  background: var(--bg-surface);
}

.section-head {
  margin-bottom: 2rem;
}

.section-head-split {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.section-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
  letter-spacing: 0.04em;
  margin-bottom: 0.45rem;
}

.section-title {
  font-family: var(--font-display-ar);
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

html[lang="en"] .section-title {
  font-family: var(--font-sans-en);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 0.96rem;
  color: var(--text-muted);
  max-width: 74ch;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.73rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.badge-published {
  background: rgba(16, 185, 129, 0.14);
  color: var(--accent-primary);
  border: 1px solid rgba(16, 185, 129, 0.32);
}

.badge-submitted {
  background: rgba(245, 158, 11, 0.14);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.32);
}

.meta-mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
}

.sys-code {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.24);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

/* Interactive 3-Tier Systems Atlas Tabs */
.atlas-tablist {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  margin-bottom: 1.5rem;
  background: var(--bg-surface);
  padding: 0.45rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.atlas-tab-btn {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: start;
}

.atlas-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.06);
}

.atlas-tab-btn[aria-selected="true"] {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.tab-code {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-primary);
  display: block;
}

.tab-label {
  flex: 1;
}

.tab-count {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-primary);
}

.tier-banner {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-inline-start: 3px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.tier-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.tier-heading {
  font-family: var(--font-display-ar);
  font-size: 1.15rem;
  margin-block: 0.15rem 0.25rem;
}

html[lang="en"] .tier-heading {
  font-family: var(--font-sans-en);
}

.tier-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.sys-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

.sys-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

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

.sys-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.sys-id-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.sys-badge {
  font-size: 0.73rem;
  color: var(--text-muted);
  font-weight: 500;
}

.sys-metric {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--accent-primary);
  background: rgba(16, 185, 129, 0.1);
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
}

.sys-title {
  font-family: var(--font-display-ar);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.38;
  color: var(--text-primary);
}

html[lang="en"] .sys-title {
  font-family: var(--font-sans-en);
}

.sys-summary {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.sys-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.spec-chip {
  font-family: var(--font-mono);
  font-size: 0.71rem;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.sys-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.65rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.83rem;
  font-weight: 600;
}

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

.sys-link-primary:hover {
  text-decoration: underline;
}

.sys-link-ext {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent-cyan);
}

/* Quintet Numbered Architectural Ledger */
.quintet-ledger {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.quintet-row {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
  display: grid;
  grid-template-columns: 3.25rem 1fr auto;
  align-items: center;
  gap: 1.25rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.quintet-row:hover {
  border-color: var(--accent-primary);
  transform: translateX(-2px);
}

html[lang="en"] .quintet-row:hover {
  transform: translateX(2px);
}

.quintet-num {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid var(--border-accent);
  height: 3.1rem;
  width: 3.1rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.quintet-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.35rem;
}

.quintet-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag-chip {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.12rem 0.5rem;
  border-radius: 4px;
}

.quintet-title {
  font-family: var(--font-display-ar);
  font-size: 1.14rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

html[lang="en"] .quintet-title {
  font-family: var(--font-sans-en);
}

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

.quintet-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.quintet-row:hover .btn-ghost {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Systems Lab Monographs Grid & Filter Bar */
.lab-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.filter-pill {
  appearance: none;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.42rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-pill:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.filter-pill.is-active {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  color: #041019;
}

.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

.lab-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.lab-card[hidden] {
  display: none !important;
}

.lab-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.lab-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.lab-card-title {
  font-family: var(--font-display-ar);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.42;
}

html[lang="en"] .lab-card-title {
  font-family: var(--font-sans-en);
}

.lab-card-title a:hover {
  color: var(--accent-cyan);
}

.lab-card-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lab-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--border-subtle);
}

.lab-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
}

.lab-read-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}

/* Architectural Principles */
.architect-bio {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 75ch;
  margin-bottom: 1.5rem;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.principle-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: inline-block;
  margin-bottom: 0.4rem;
}

.principle-box h3 {
  font-family: var(--font-display-ar);
  font-size: 1.02rem;
  margin-bottom: 0.45rem;
}

html[lang="en"] .principle-box h3 {
  font-family: var(--font-sans-en);
}

.principle-box p {
  font-size: 0.87rem;
  color: var(--text-secondary);
}

/* Article Reading Page & Coming Soon Preview Card */
.reading-progress {
  position: fixed;
  top: 0;
  inset-inline-start: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));
  z-index: 200;
}

.article-page-main {
  padding-block: 2.25rem 4rem;
}

.article-hero {
  max-width: 840px;
  margin-inline: auto;
  margin-bottom: 1.75rem;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}

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

.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.article-h1 {
  font-family: var(--font-display-ar);
  font-size: clamp(1.65rem, 3.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1.32;
  margin-bottom: 0.9rem;
}

html[lang="en"] .article-h1 {
  font-family: var(--font-sans-en);
  line-height: 1.22;
}

.article-standfirst {
  font-size: clamp(1rem, 1.25vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.25rem;
  padding-inline-start: 1rem;
  border-inline-start: 3px solid var(--accent-primary);
}

.article-byline-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-block: 0.9rem;
  border-block: 1px solid var(--border-subtle);
  margin-bottom: 0.9rem;
}

.byline-author {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.byline-name {
  font-weight: 700;
  font-size: 0.92rem;
}

.byline-role {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.byline-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn-secondary-sm,
.btn-primary-sm {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.42rem 0.85rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
}

.btn-secondary-sm {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.btn-secondary-sm:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-primary-sm {
  background: var(--accent-primary);
  color: #04120e;
}

.article-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.article-cover {
  max-width: 840px;
  margin-inline: auto;
  margin-bottom: 2.25rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
}

.article-cover-img {
  width: 100%;
  max-height: 440px;
  object-fit: cover;
}

.article-content-grid {
  display: grid;
  grid-template-columns: 250px minmax(0, 740px);
  gap: 2.5rem;
  justify-content: center;
  align-items: start;
}

.article-content-single {
  max-width: 760px;
  margin-inline: auto;
}

.article-sidebar {
  position: sticky;
  top: var(--anchor-offset);
}

.toc-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 0.65rem;
  text-transform: uppercase;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.toc-link {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: block;
}

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

.toc-actions {
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.toc-md-btn,
.toc-top-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-cyan);
}

.article-prose {
  font-size: clamp(1.04rem, 1.15vw, 1.14rem);
  line-height: 1.92;
  color: var(--text-primary);
}

html[lang="en"] .article-prose {
  line-height: 1.8;
}

.article-prose p {
  margin-bottom: 1.35rem;
  color: var(--text-secondary);
}

.article-prose strong {
  color: var(--text-primary);
  font-weight: 700;
}

.coming-soon-card {
  margin-top: 2rem;
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(16, 185, 129, 0.08), rgba(56, 189, 248, 0.06));
  border: 1px solid var(--border-accent);
  box-shadow: var(--shadow-card);
}

.coming-soon-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 0.85rem;
}

.coming-soon-title {
  font-family: var(--font-display-ar);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.55rem;
}

html[lang="en"] .coming-soon-title {
  font-family: var(--font-sans-en);
}

.coming-soon-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.coming-soon-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.section-heading {
  font-family: var(--font-display-ar);
  font-size: 1.38rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2.4rem;
  margin-bottom: 0.9rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

html[lang="en"] .section-heading {
  font-family: var(--font-sans-en);
}

.heading-anchor {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-primary);
  opacity: 0.5;
}

.section-heading:hover .heading-anchor {
  opacity: 1;
}

.article-list {
  margin-bottom: 1.4rem;
  padding-inline-start: 1.35rem;
  color: var(--text-secondary);
}

.article-list li {
  margin-bottom: 0.55rem;
}

.inline-code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  padding: 0.12rem 0.4rem;
  border-radius: 4px;
}

.ext-link {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.author-signoff {
  margin-top: 2rem;
  padding: 1.1rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-inline-start: 3px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.references-box {
  margin-top: 2.25rem;
  padding: 1.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.references-title {
  font-family: var(--font-display-ar);
  font-size: 1.1rem;
  margin-bottom: 0.85rem;
  color: var(--accent-primary);
}

.references-content {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.article-pager {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.pager-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.pager-card:hover {
  border-color: var(--accent-primary);
}

.pager-dir {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-primary);
}

.pager-title {
  font-size: 0.92rem;
  line-height: 1.4;
}

/* Footer */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding-block: 2.75rem 1.75rem;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-brand-row {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
}

.footer-brand {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.footer-col-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

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

.footer-bottom {
  padding-top: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.78rem;
}

.footer-mono {
  font-family: var(--font-mono);
  color: var(--text-faint);
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .telemetry-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  .atlas-tablist {
    grid-template-columns: 1fr;
  }
  .principles-grid {
    grid-template-columns: 1fr;
  }
  .article-content-grid {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .main-nav {
    display: none;
  }
  .quintet-row {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  .article-pager {
    grid-template-columns: 1fr;
  }
}