/* ===================================================
   DEPOSITION INTELLIGENCE BRIEFING — Site Styles
   CLASSIFICATION: UNRESTRICTED // FOUO
   AI · STRATEGY · TESTIMONY
   SKRIBE.AI // INTELLIGENCE DIVISION
   =================================================== */

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

:root {
  --bg-primary: #060A14;
  --bg-secondary: #080E1C;
  --bg-card: #0C1424;
  --bg-card-hover: #101C32;
  --bg-prompt: #080E1C;
  --border-color: #152036;
  --border-accent: #1E3A6E;
  --accent-blue: #4A7BF7;
  --accent-bright: #6B9AFF;
  --accent-glow: rgba(74, 123, 247, 0.10);
  --accent-green: #22C55E;
  --text-white: #E8ECF2;
  --text-light: #D0D8E4;
  --text-muted: #8899AD;
  --text-dim: #5A6D82;
  --skribe-blue: #4A7BF7;
  --success: #22C55E;
  --warning: #F59E0B;
  --danger: #EF4444;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --font-tactical: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --max-width: 1200px;
  --content-width: 820px;
  --radius: 2px;
  --radius-lg: 3px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; font-size: 17px; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-light);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  /* Tactical grid background */
  background-image:
    linear-gradient(rgba(74, 123, 247, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 123, 247, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* Scanline overlay — subtle CRT / HUD effect */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

a { color: var(--accent-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-bright); }
img { max-width: 100%; height: auto; }

/* --- Typography --- */
h1, h2, h3, h4, h5 { font-family: var(--font-heading); color: var(--text-white); line-height: 1.25; font-weight: 700; }
h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

/* Tactical/monospaced utility class */
.tactical {
  font-family: var(--font-tactical);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* --- Classification Banner (top of pages) --- */
.classification-banner {
  background: rgba(74, 123, 247, 0.06);
  border-bottom: 1px solid var(--border-color);
  padding: 0.3rem 2rem;
  text-align: center;
  font-family: var(--font-tactical);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* --- Status Indicator (blinking dot) --- */
.status-live {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-green);
}
.status-live::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50% { opacity: 0.6; box-shadow: 0 0 0 4px rgba(34, 197, 94, 0); }
}

/* --- Layout --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }
.content-container { max-width: var(--content-width); margin: 0 auto; padding: 0 2rem; }

/* --- Navigation --- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(6, 10, 20, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 2rem;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-tactical);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.nav-seal {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 6px rgba(74, 123, 247, 0.25));
  transition: filter var(--transition), transform var(--transition);
}
.nav-brand:hover .nav-seal {
  filter: drop-shadow(0 0 12px rgba(74, 123, 247, 0.45));
  transform: scale(1.05);
}
.nav-brand .brand-accent {
  color: var(--accent-blue);
  font-size: 1rem;
  font-weight: 800;
  text-shadow: 0 0 20px rgba(74, 123, 247, 0.3);
}
.nav-brand .brand-divider { color: var(--text-dim); font-weight: 400; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a {
  color: var(--text-dim);
  font-family: var(--font-tactical);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-white); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 0; right: 0;
  height: 2px;
  background: var(--accent-blue);
  box-shadow: 0 0 8px rgba(74, 123, 247, 0.5);
}
.nav-cta {
  background: var(--accent-blue) !important;
  color: #fff !important;
  padding: 0.4rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  transition: background var(--transition), transform var(--transition);
}
.nav-cta:hover { background: var(--accent-bright) !important; transform: translateY(-1px); }

/* Mobile nav toggle */
.nav-toggle { display: none; background: none; border: none; color: var(--text-white); font-size: 1.5rem; cursor: pointer; }

/* --- Hero Section --- */
.hero {
  padding: 5rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}
/* Radial glow */
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(74, 123, 247, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
  pointer-events: none;
}
/* Giant "DIB" watermark */
.hero::after {
  content: 'DIB';
  position: absolute;
  right: -2%;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-heading);
  font-size: 22rem;
  font-weight: 900;
  color: rgba(74, 123, 247, 0.035);
  letter-spacing: -0.05em;
  pointer-events: none;
  line-height: 1;
}
/* Corner brackets — tactical HUD frame */
.hero-frame-tl, .hero-frame-tr, .hero-frame-bl, .hero-frame-br {
  position: absolute;
  width: 30px; height: 30px;
  z-index: 2;
}
.hero-frame-tl { top: 20px; left: 20px; border-top: 2px solid var(--border-accent); border-left: 2px solid var(--border-accent); }
.hero-frame-tr { top: 20px; right: 20px; border-top: 2px solid var(--border-accent); border-right: 2px solid var(--border-accent); }
.hero-frame-bl { bottom: 20px; left: 20px; border-bottom: 2px solid var(--border-accent); border-left: 2px solid var(--border-accent); }
.hero-frame-br { bottom: 20px; right: 20px; border-bottom: 2px solid var(--border-accent); border-right: 2px solid var(--border-accent); }

/* Hero Seal */
.hero-seal {
  width: 180px;
  height: 180px;
  margin: 0 auto 2rem;
  position: relative;
  z-index: 1;
  animation: seal-fade-in 1.2s ease-out;
  filter: drop-shadow(0 0 30px rgba(74, 123, 247, 0.2));
}
.hero-seal svg {
  width: 100%;
  height: 100%;
}
@keyframes seal-fade-in {
  0% { opacity: 0; transform: scale(0.85); }
  100% { opacity: 1; transform: scale(1); }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--accent-blue);
  font-family: var(--font-tactical);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}
.hero-eyebrow .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--accent-blue); box-shadow: 0 0 6px rgba(74, 123, 247, 0.6); }
.hero h1 {
  font-size: 3.25rem;
  max-width: 800px;
  margin: 0 auto 1.25rem;
  color: var(--text-white);
  font-weight: 800;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}
.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-family: var(--font-tactical);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--accent-blue);
  color: #fff;
  box-shadow: 0 2px 12px rgba(74, 123, 247, 0.25), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-primary:hover {
  background: var(--accent-bright);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(74, 123, 247, 0.4), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-secondary {
  background: transparent;
  color: var(--text-white);
  border: 1px solid var(--border-accent);
}
.btn-secondary:hover {
  background: rgba(74, 123, 247, 0.06);
  color: var(--text-white);
  border-color: var(--accent-blue);
}

/* --- Section --- */
.section { padding: 5rem 2rem; }
.section-dark { background: var(--bg-secondary); background-image: none; }
.section-blue {
  background: linear-gradient(180deg, rgba(74, 123, 247, 0.05) 0%, rgba(74, 123, 247, 0.02) 100%);
  border-top: 1px solid rgba(74, 123, 247, 0.1);
  border-bottom: 1px solid rgba(74, 123, 247, 0.1);
}
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-header h2 { margin-bottom: 1rem; }
.section-header p { color: var(--text-muted); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }

/* --- Intel Section Label (used before feature groups) --- */
.intel-label {
  font-family: var(--font-tactical);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  padding-left: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.intel-label::before {
  content: '';
  width: 12px; height: 1px;
  background: var(--accent-blue);
}

/* --- Feature Grid --- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-blue);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
  position: relative;
}
.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  border-left-color: var(--accent-bright);
}
/* Corner tick marks on cards */
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 12px; height: 12px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.feature-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}
.feature-icon svg {
  width: 22px; height: 22px;
  stroke: var(--accent-blue);
  stroke-width: 1.5;
  fill: none;
}
.feature-card h3 {
  font-family: var(--font-tactical);
  font-size: 0.82rem;
  margin-bottom: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.feature-card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

/* --- Chapter Cards (Guide Landing) --- */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
}
.chapter-card {
  display: flex;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-blue);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
}
.chapter-card:hover {
  background: var(--bg-card-hover);
  border-left-color: var(--accent-bright);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}
.chapter-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 10px; height: 10px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.chapter-number {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: var(--radius);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-tactical);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--accent-blue);
  letter-spacing: 0.05em;
}
.chapter-info h3 { font-size: 1rem; margin-bottom: 0.35rem; color: var(--text-white); }
.chapter-info .chapter-label {
  font-family: var(--font-tactical);
  font-size: 0.62rem;
  color: var(--accent-blue);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}
.chapter-info p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.5; }

/* --- Prompt Blocks (Chapter Pages) --- */
.prompt-block {
  background: var(--bg-prompt);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-blue);
  border-radius: var(--radius);
  margin: 1.5rem 0;
  position: relative;
  overflow: hidden;
}
/* Diagonal stripes on prompt header (classified document feel) */
.prompt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--border-color);
  background:
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 10px,
      rgba(74, 123, 247, 0.02) 10px,
      rgba(74, 123, 247, 0.02) 20px
    ),
    rgba(74, 123, 247, 0.04);
}
.prompt-label {
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent-blue);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  font-family: var(--font-tactical);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.copy-btn:hover { border-color: var(--accent-blue); color: var(--accent-blue); background: var(--accent-glow); }
.copy-btn.copied { border-color: var(--success); color: var(--success); }
.prompt-content {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-light);
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* --- Chapter Layout with Sidebar --- */
.chapter-layout {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem 0 0.5rem;
  align-items: start;
}
.chapter-sidebar {
  position: sticky;
  top: 5rem;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  padding: 1.25rem 0;
  border-right: 1px solid var(--border-color);
}
.chapter-sidebar-label {
  font-family: var(--font-tactical);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 0 0.75rem 0.75rem;
  margin-bottom: 0.25rem;
}
.chapter-sidebar a {
  display: block;
  padding: 0.45rem 0.75rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all 0.15s;
}
.chapter-sidebar a:hover {
  color: var(--text-light);
  border-left-color: var(--border-accent);
  background: rgba(74, 123, 247, 0.03);
}
.chapter-sidebar a.active {
  color: var(--accent-blue);
  border-left-color: var(--accent-blue);
  background: rgba(74, 123, 247, 0.06);
}
.chapter-sidebar::-webkit-scrollbar { width: 3px; }
.chapter-sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
.chapter-main { min-width: 0; }

/* When chapter layout is active, override content-container width constraint */
.content-container:has(.chapter-layout),
.content-container.has-chapter-layout {
  max-width: 1400px;
  padding: 0;
}

@media (max-width: 900px) {
  .chapter-layout {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }
  .chapter-sidebar {
    display: none;
  }
}

/* --- Chapter Section Alternating Backgrounds --- */
.chapter-section {
  padding: 2rem 0;
  margin: 0 -2rem;
  padding-left: 2rem;
  padding-right: 2rem;
}
.chapter-section:first-child { padding-top: 0; }
.chapter-section-blue {
  background: linear-gradient(180deg, rgba(74, 123, 247, 0.04) 0%, rgba(74, 123, 247, 0.015) 100%);
  border-top: 1px solid rgba(74, 123, 247, 0.08);
  border-bottom: 1px solid rgba(74, 123, 247, 0.08);
}

/* --- Chapter Content Styles --- */
.chapter-page { padding: 3rem 2rem 5rem; }
.chapter-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 2rem;
}
.chapter-breadcrumb a { color: var(--text-muted); }
.chapter-breadcrumb a:hover { color: var(--accent-blue); }
.chapter-breadcrumb .sep { color: var(--text-dim); }

.chapter-title-block {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-blue);
  padding-left: 1.5rem;
  position: relative;
}
.chapter-title-block::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 16px; height: 16px;
  border-top: 2px solid var(--border-accent);
  border-right: 2px solid var(--border-accent);
}
.chapter-title-block .chapter-num {
  display: inline-block;
  font-family: var(--font-tactical);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--accent-blue);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.chapter-title-block h1 { font-size: 2.1rem; margin-bottom: 0.75rem; }
.chapter-title-block .chapter-desc { font-size: 1.05rem; color: var(--text-muted); }

.chapter-body h2 {
  font-size: 1.5rem;
  margin: 3rem 0 1.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}
.chapter-body h2:first-child { border-top: none; padding-top: 0; margin-top: 0; }
.chapter-body h3 { font-size: 1.2rem; margin: 2rem 0 1rem; color: var(--accent-bright); }
.chapter-body h4 {
  font-size: 0.88rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--text-light);
  font-family: var(--font-tactical);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}
.chapter-body p { margin-bottom: 1rem; color: var(--text-light); }
.chapter-body ul, .chapter-body ol { margin: 0.75rem 0 1.25rem 1.5rem; color: var(--text-light); }
.chapter-body li { margin-bottom: 0.5rem; }
.chapter-body strong { color: var(--text-white); }

.chapter-body .callout {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  position: relative;
}
.chapter-body .callout::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 8px; height: 8px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.chapter-body .callout-warning {
  border-left: 3px solid var(--warning);
}
.chapter-body .callout-info {
  border-left: 3px solid var(--accent-blue);
}
.chapter-body .callout-title {
  font-family: var(--font-tactical);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Chapter nav (prev/next) */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}
.chapter-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: all var(--transition);
  max-width: 45%;
}
.chapter-nav a:hover { border-color: var(--accent-blue); background: var(--bg-card-hover); }
.chapter-nav .nav-label {
  font-family: var(--font-tactical);
  font-size: 0.6rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.chapter-nav .nav-title { font-size: 0.92rem; color: var(--text-white); font-weight: 600; }
.chapter-nav .next { text-align: right; margin-left: auto; }

/* --- Archive Cards --- */
.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.25rem;
  max-width: var(--max-width);
  margin: 0 auto;
}
.archive-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-blue);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
}
.archive-card:hover {
  border-left-color: var(--accent-bright);
  background: var(--bg-card-hover);
}
.archive-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 10px; height: 10px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.archive-card-header {
  padding: 1.5rem 1.5rem 0;
}
.archive-date {
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  color: var(--accent-blue);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.archive-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.archive-card-body {
  padding: 0.75rem 1.5rem 1.5rem;
}
.archive-preview {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 1rem;
}
.archive-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 1rem; }
.archive-tag {
  font-family: var(--font-tactical);
  font-size: 0.58rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  background: var(--accent-glow);
  color: var(--accent-blue);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.archive-lock {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: rgba(74, 123, 247, 0.03);
  font-family: var(--font-tactical);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}
.archive-lock a { font-weight: 600; color: var(--accent-blue); }

/* --- Email Signup Form --- */
.signup-form {
  display: flex;
  gap: 0.75rem;
  max-width: 500px;
  margin: 0 auto;
}
.signup-form input {
  flex: 1;
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-white);
  font-family: var(--font-tactical);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  outline: none;
  transition: border-color var(--transition);
}
.signup-form input::placeholder { color: var(--text-dim); }
.signup-form input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 2px var(--accent-glow), 0 0 12px rgba(74, 123, 247, 0.15); }

.signup-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-top: 3px solid var(--accent-blue);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  max-width: 660px;
  margin: 3rem auto;
  position: relative;
}
.signup-banner::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 14px; height: 14px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.signup-banner h2 { margin-bottom: 0.75rem; font-size: 1.5rem; }
.signup-banner p { color: var(--text-muted); margin-bottom: 1.5rem; font-size: 0.95rem; }

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 2rem 2rem;
  text-align: center;
  background: var(--bg-primary);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-tactical);
  font-weight: 600;
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.footer-seal {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  opacity: 0.6;
}
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  color: var(--text-dim);
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.footer-links a:hover { color: var(--accent-blue); }
.footer-copy { font-size: 0.65rem; color: var(--text-dim); font-family: var(--font-tactical); letter-spacing: 0.04em; }

/* --- Stats Row --- */
.stats-row {
  display: flex;
  justify-content: center;
  gap: 4rem;
  padding: 2rem 0;
}
.stat { text-align: center; }
.stat-number {
  font-family: var(--font-tactical);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-blue);
  display: block;
  letter-spacing: -0.02em;
  text-shadow: 0 0 30px rgba(74, 123, 247, 0.2);
}
.stat-label {
  font-family: var(--font-tactical);
  font-size: 0.62rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* --- Horizontal rule divider (intelligence briefing style) --- */
.section-divider {
  text-align: center;
  padding: 2rem 0;
  position: relative;
}
.section-divider::before {
  content: '';
  position: absolute;
  left: 0; right: 0;
  top: 50%;
  height: 1px;
  background: var(--border-color);
}
.section-divider span {
  position: relative;
  font-family: var(--font-tactical);
  background: var(--bg-primary);
  padding: 0 1.5rem;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

/* --- Intel CTA Banner (top banner across guide pages) --- */
.intel-banner {
  background:
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 10px,
      rgba(74, 123, 247, 0.03) 10px,
      rgba(74, 123, 247, 0.03) 20px
    ),
    linear-gradient(135deg, rgba(74, 123, 247, 0.08) 0%, rgba(74, 123, 247, 0.02) 100%);
  border-top: 1px solid var(--border-accent);
  border-bottom: 1px solid var(--border-accent);
  padding: 1rem 2rem;
}
.intel-banner-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.intel-banner-label {
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}
.intel-banner-text {
  color: var(--text-light);
  font-size: 0.92rem;
  margin: 0;
}

/* --- Tool Recommendation Banner (chapter pages) --- */
.tool-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  position: relative;
}
.tool-banner::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 8px; height: 8px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.tool-banner-icon { font-size: 1.4rem; flex-shrink: 0; }
.tool-banner-label {
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}
.tool-banner-text {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.6;
  margin: 0;
}

/* --- NITA Callout (chapter pages) --- */
.nita-callout {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-blue);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
  position: relative;
}
.nita-callout::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 8px; height: 8px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.nita-callout-title {
  font-family: var(--font-tactical);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

/* --- Scenario / War Story Box --- */
.scenario-box {
  background: linear-gradient(135deg, rgba(74, 123, 247, 0.06) 0%, rgba(74, 123, 247, 0.02) 100%);
  border: 1px solid rgba(74, 123, 247, 0.18);
  border-left: 3px solid var(--accent-blue);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 1rem;
  position: relative;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-light);
}
.scenario-box::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 10px; height: 10px;
  border-top: 1px solid rgba(74, 123, 247, 0.25);
  border-right: 1px solid rgba(74, 123, 247, 0.25);
}
.scenario-label {
  font-family: var(--font-tactical);
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.scenario-box p { margin: 0.5rem 0 0; }
.scenario-box p:first-of-type { margin-top: 0; }

/* --- Advocacy Principle Callout --- */
.principle-callout {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--warning);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 0.75rem 0 1.25rem;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-muted);
  position: relative;
}
.principle-callout::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 6px; height: 6px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.principle-label {
  font-family: var(--font-tactical);
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--warning);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

/* --- Prompt Quick-Jump Index --- */
.prompt-index {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  position: relative;
}
.prompt-index::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 8px; height: 8px;
  border-top: 1px solid var(--border-accent);
  border-right: 1px solid var(--border-accent);
}
.prompt-index-label {
  font-family: var(--font-tactical);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.prompt-index-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.prompt-index-grid a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.65rem;
  background: var(--bg-prompt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-family: var(--font-tactical);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
}
.prompt-index-grid a:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: var(--accent-glow);
}
.prompt-index-grid a .pi-num {
  color: var(--accent-blue);
  font-weight: 700;
}

/* --- Pro Tip Box --- */
.pro-tip {
  background: rgba(34, 197, 94, 0.06);
  border: 1px solid rgba(34, 197, 94, 0.15);
  border-left: 3px solid var(--success);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0 1.5rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-muted);
}
.pro-tip-label {
  font-family: var(--font-tactical);
  font-size: 0.58rem;
  font-weight: 700;
  color: var(--success);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

/* --- Responsive: Tablet (iPad) --- */
@media (max-width: 900px) {
  /* Force inline grid overrides to single/two column */
  [style*="grid-template-columns: repeat(3"] {
    grid-template-columns: 1fr 1fr !important;
  }
  [style*="grid-template-columns:repeat(3"] {
    grid-template-columns: 1fr 1fr !important;
  }

  /* Hero seal: smaller on tablet */
  .hero-seal { max-width: 240px; }

  /* Prompt index grid: 3 columns on tablet */
  .prompt-index-grid {
    grid-template-columns: repeat(3, 1fr) !important;
  }

  /* Chapter page content tighter */
  .chapter-page { padding: 2rem 1.5rem 4rem; }
  .chapter-section { margin: 0 -1.5rem; padding-left: 1.5rem; padding-right: 1.5rem; }

  /* Workflow steps */
  .workflow-steps { gap: 1rem; }
}

/* --- Responsive: Mobile (iPhone) --- */
@media (max-width: 768px) {
  body::after { display: none; } /* Remove scanlines on mobile for perf */

  /* Nav */
  .nav { padding: 0 1rem; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 52px;
    left: 0; right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    gap: 1rem;
    z-index: 200;
  }
  .nav-links.open a.active::after { display: none; }
  .nav-toggle { display: block; }
  .nav-brand span:not(.brand-accent):not(.brand-divider) { display: none; }

  /* Hero */
  .hero { padding: 3rem 1.25rem 2.5rem; }
  .hero h1 { font-size: 2rem; }
  .hero::after { font-size: 10rem; right: -10%; }
  .hero-subtitle { font-size: 0.95rem; }
  .hero-seal { max-width: 180px; margin-bottom: 1rem; }
  .hero-frame-tl, .hero-frame-tr, .hero-frame-bl, .hero-frame-br { display: none; }
  .hero-actions { flex-direction: column; gap: 0.75rem; align-items: stretch; }
  .hero-actions .btn { justify-content: center; text-align: center; }
  .hero-eyebrow { flex-wrap: wrap; justify-content: center; }

  /* Classification banner */
  .classification-banner { font-size: 0.45rem; letter-spacing: 0.12em; padding: 0.25rem 0.75rem; }

  /* Typography */
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }
  h3 { font-size: 1.15rem; }

  /* Force ALL inline grids to single column on mobile */
  [style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }
  .feature-grid, .chapter-grid, .archive-grid {
    grid-template-columns: 1fr !important;
  }

  /* Stats row */
  .stats-row { gap: 1.5rem; flex-wrap: wrap; }
  .stat { min-width: 0; }

  /* Cards */
  .feature-card { padding: 1.5rem !important; }

  /* Chapter nav */
  .chapter-nav { flex-direction: column; }
  .chapter-nav a { max-width: 100%; }

  /* Signup */
  .signup-form { flex-direction: column; }
  .signup-form input, .signup-form button { width: 100%; }
  .signup-banner { padding: 2rem 1.25rem !important; }
  .intel-banner-inner { justify-content: center; text-align: center; }

  /* Prompt blocks */
  .prompt-block { padding: 1.25rem; }
  .prompt-content { font-size: 0.82rem; }
  .prompt-header { flex-direction: column; gap: 0.5rem; }

  /* Prompt index grid: 2 columns */
  .prompt-index-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.4rem !important;
  }
  .prompt-index { padding: 1rem; }

  /* Scenario & principle boxes */
  .scenario-box, .principle-callout { padding: 1.25rem; margin: 1.5rem 0; }

  /* Chapter pages */
  .chapter-page { padding: 1.5rem 1rem 3rem; }
  .chapter-title-block { padding-left: 1rem; }
  .chapter-section { margin: 0 -1rem; padding-left: 1rem; padding-right: 1rem; }

  /* Tool banner */
  .tool-banner { padding: 1rem; }
  .tool-banner-inner { flex-direction: column; gap: 0.75rem; text-align: center; }

  /* Tables */
  table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }

  /* Workflow selector */
  .workflow-grid { grid-template-columns: 1fr !important; }
  .workflow-btn { font-size: 0.8rem; padding: 0.75rem; }
}

/* --- Responsive: Small phones --- */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.5rem; }
  .hero::after { display: none; }
  .container, .content-container { padding: 0 0.75rem; }
  .section { padding: 2.5rem 0.75rem; }

  /* Single column prompt index */
  .prompt-index-grid {
    grid-template-columns: 1fr !important;
  }

  /* Smaller stat numbers */
  .stat-number { font-size: 2rem; }

  /* Chapter breadcrumb wrapping */
  .chapter-breadcrumb { flex-wrap: wrap; }
}

/* --- Touch device improvements --- */
@media (hover: none) and (pointer: coarse) {
  /* Larger tap targets */
  .nav-links a { padding: 0.5rem 0; }
  .prompt-index-grid a { min-height: 44px; display: flex; align-items: center; justify-content: center; }
  .btn { min-height: 44px; }
  .chapter-sidebar a { padding: 0.6rem 0.75rem; }
}