/* Thin White Lies — Scientific Observatory & Artistic Inquiry Design System */
:root {
  --bg-void: #05060b;
  --bg-surface: #0b0d18;
  --bg-card: rgba(16, 19, 36, 0.78);
  --bg-glass: rgba(13, 16, 31, 0.84);
  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-accent: rgba(56, 189, 248, 0.38);
  --border-violet: rgba(168, 85, 247, 0.42);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-cyan: #38bdf8;
  --accent-violet: #a855f7;
  --accent-amber: #f59e0b;
  --accent-emerald: #10b981;
  --font-serif: "Charter", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", Consolas, monospace;
  --max-w: 1220px;
  --reading-w: 780px;
}

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

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

body {
  min-height: 100vh;
  background-color: var(--bg-void);
  background-image:
    radial-gradient(circle at 15% 12%, rgba(126, 34, 206, 0.16) 0%, transparent 42%),
    radial-gradient(circle at 85% 22%, rgba(56, 189, 248, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 50% 85%, rgba(245, 158, 11, 0.07) 0%, transparent 45%),
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  overflow-x: hidden;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #7dd3fc;
}

/* Sticky Observatory Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 6, 11, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  color: var(--text-primary);
}

.brand-emblem {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  box-shadow: 0 0 18px rgba(168, 85, 247, 0.45);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.brand-link:hover .brand-emblem {
  transform: scale(1.05);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.65);
}

.brand-title {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.brand-subtitle {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(56, 189, 248, 0.1);
}

.nav-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.38);
  color: #34d399;
}

/* Hero Section */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4.5rem 1.5rem 3.5rem;
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.09);
  border: 1px solid var(--border-accent);
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4.2vw, 3.6rem);
  line-height: 1.14;
  font-weight: 700;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 55%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 1.85rem;
  max-width: 64ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: linear-gradient(135deg, #0284c7 0%, #7e22ce 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.96rem;
  padding: 0.85rem 1.55rem;
  border-radius: 10px;
  border: 1px solid rgba(56, 189, 248, 0.45);
  box-shadow: 0 10px 28px -8px rgba(56, 189, 248, 0.45);
  cursor: pointer;
}

.btn-primary:hover {
  color: #ffffff;
  filter: brightness(1.12);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: rgba(15, 23, 42, 0.75);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.85rem 1.4rem;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
}

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

.telemetry-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.telemetry-item {
  background: rgba(15, 23, 42, 0.48);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.8rem 1rem;
}

.telemetry-val {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-amber);
}

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

/* Visual Showcase Card */
.hero-visual-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-violet);
  border-radius: 18px;
  padding: 1.25rem;
  box-shadow: 0 24px 60px -15px rgba(0, 0, 0, 0.75), 0 0 40px rgba(126, 34, 206, 0.18);
}

.hero-visual-card img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

.visual-caption {
  margin-top: 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Section Layout */
.section-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

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

.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  margin-bottom: 0.5rem;
}

/* Interactive Rust/WASM Simulator Panel */
.lab-panel {
  background: linear-gradient(145deg, rgba(14, 18, 38, 0.92), rgba(9, 11, 24, 0.95));
  border: 1px solid var(--border-accent);
  border-radius: 18px;
  padding: 2rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  margin-bottom: 3rem;
}

.lab-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
  margin-top: 1.25rem;
}

.slider-group {
  margin-bottom: 1.25rem;
}

.slider-group label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

.readout-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
}

.readout-box {
  background: rgba(5, 6, 11, 0.78);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.95rem;
}

.readout-box .k {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

.readout-box .v {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-top: 0.2rem;
}

/* Socratic Featured Article Layout */
.article-shell {
  max-width: var(--reading-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.question-callout {
  background: linear-gradient(135deg, rgba(126, 34, 206, 0.16), rgba(2, 132, 199, 0.12));
  border-left: 4px solid var(--accent-cyan);
  border-radius: 0 14px 14px 0;
  padding: 1.5rem 1.75rem;
  margin: 2rem 0;
}

.question-callout .q-tag {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-amber);
  display: block;
  margin-bottom: 0.4rem;
}

.question-callout p {
  font-family: var(--font-serif);
  font-size: 1.32rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.45;
}

.article-body h2 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  margin: 2.6rem 0 1rem;
  color: #f1f5f9;
}

.article-body h3 {
  font-family: var(--font-sans);
  font-size: 1.22rem;
  color: var(--accent-cyan);
  margin: 1.9rem 0 0.75rem;
}

.article-body p {
  font-size: 1.09rem;
  color: var(--text-secondary);
  margin-bottom: 1.35rem;
  line-height: 1.8;
}

.fact-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.5rem;
  margin: 1.85rem 0;
}

.fact-box h4 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-emerald);
  margin-bottom: 0.75rem;
}

.equation-block {
  font-family: var(--font-mono);
  font-size: 1rem;
  background: #05060b;
  border: 1px solid var(--border-violet);
  color: #fde68a;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  margin: 1.25rem 0;
  overflow-x: auto;
}

.diagram-figure {
  margin: 2.2rem 0;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1rem;
}

.diagram-figure img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
}

.diagram-figure figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

/* Cookie Consent Banner & Native <dialog> Modal */
.cookie-banner {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(94vw, 880px);
  background: rgba(9, 11, 22, 0.96);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border-accent);
  border-radius: 16px;
  padding: 1.35rem 1.6rem;
  z-index: 900;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.85);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}

.cookie-banner[hidden] {
  display: none !important;
}

.cookie-text {
  flex: 1 1 420px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.cookie-text strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.25rem;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.btn-sm {
  font-size: 0.82rem;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  background: #13172b;
  color: var(--text-primary);
}

.btn-sm.accept {
  background: var(--accent-cyan);
  color: #05060b;
  border-color: var(--accent-cyan);
}

dialog.privacy-modal {
  margin: auto;
  width: min(92vw, 560px);
  background: #0b0e1d;
  color: var(--text-primary);
  border: 1px solid var(--border-violet);
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.9);
}

dialog.privacy-modal::backdrop {
  background: rgba(3, 4, 9, 0.78);
  backdrop-filter: blur(6px);
}

.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: #040509;
  padding: 3rem 1.5rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  color: var(--text-muted);
  font-size: 0.86rem;
}

@media (max-width: 860px) {
  .hero, .lab-grid {
    grid-template-columns: 1fr;
  }
  .telemetry-strip {
    grid-template-columns: 1fr;
  }
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-links {
    flex-wrap: wrap;
    gap: 0.65rem;
  }
}