/* ============================================
   COGNOSCIENT — STYLESHEET
   Aesthetic: Dark Tech / App-Matched Blue-Cyan
   Palette pulled from the Cognoscient desktop app UI
   Fonts: Cinzel (display) + Lora (body) + Space Mono (code/labels)
   ============================================ */

/* ── CSS VARIABLES ── */
:root {
  --ink: #080a0f;
  --paper: #e8edf5;
  --midnight: #0d0f16;
  --deep: #111420;
  --surface: #171b28;
  --surface2: #1e2333;
  --border: rgba(56, 189, 248, 0.12);
  --border-bright: rgba(56, 189, 248, 0.35);

  /* Primary accent — cyan/blue matching the app */
  --gold: #38bdf8;          /* was gold, now app-cyan */
  --gold-light: #7dd3fc;
  --gold-pale: rgba(56, 189, 248, 0.08);
  --gold-glow: rgba(56, 189, 248, 0.22);

  /* Secondary accent — purple matching app logo gradient */
  --teal: #a78bfa;          /* was teal, now app-purple */
  --teal-dark: #7c3aed;
  --teal-pale: rgba(167, 139, 250, 0.1);
  --teal-glow: rgba(167, 139, 250, 0.2);

  /* Tertiary — keep a warm note for variety */
  --amber: #f472b6;         /* soft pink accent */
  --crimson: #ef4444;
  --muted: #6b7a99;
  --light: #c2cce8;

  --ks-green: #2bde73;
  --ks-green-dark: #05ce78;
  --ks-glow: rgba(43, 222, 115, 0.2);

  /* App blue used in borders, checkboxes, active states */
  --app-blue: #1e90ff;
  --app-blue-pale: rgba(30, 144, 255, 0.1);
  --app-blue-glow: rgba(30, 144, 255, 0.25);

  --font-display: 'Cinzel', serif;
  --font-body: 'Lora', serif;
  --font-mono: 'Space Mono', monospace;

  --radius: 4px;
  --radius-lg: 8px;
  --transition: 0.25s ease;
  --shadow: 0 4px 32px rgba(0,0,0,0.6);
  --shadow-cyan: 0 0 40px rgba(56, 189, 248, 0.12);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--midnight);
  color: var(--light);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--gold); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--gold-light); }

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface2);
  padding: 2px 6px;
  border-radius: var(--radius);
  color: var(--teal);
}

img { max-width: 100%; }

/* ── CONTAINERS ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── NAVIGATION ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}

.nav.scrolled {
  background: rgba(10, 11, 13, 0.98);
  border-bottom-color: var(--border-bright);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* nav-logo is now image-based — see BRAND ASSET STYLES section below */

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--gold);
  background: var(--gold-pale);
}

.nav-ks {
  color: var(--ks-green) !important;
  border: 1px solid rgba(43, 222, 115, 0.3);
  margin-left: 0.5rem;
}

.nav-ks:hover {
  background: var(--ks-glow) !important;
  border-color: var(--ks-green) !important;
}

/* ── DEMO DROPDOWN ── */
.nav-demo-wrapper {
  position: relative;
  margin-left: 0.25rem;
}

.nav-demo {
  color: var(--gold) !important;
  border: 1px solid var(--border-bright);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  user-select: none;
}

/* The small chevron caret */
.nav-demo-caret {
  display: inline-block;
  font-size: 0.55rem;
  opacity: 0.7;
  transition: transform 0.2s ease;
  line-height: 1;
}

.nav-demo-wrapper:hover .nav-demo,
.nav-demo-wrapper.open .nav-demo {
  background: var(--gold-pale) !important;
  border-color: var(--gold) !important;
  color: var(--gold) !important;
}

.nav-demo-wrapper:hover .nav-demo-caret,
.nav-demo-wrapper.open .nav-demo-caret {
  transform: rotate(180deg);
}

/* Dropdown panel */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 220px;
  background: rgba(13, 15, 22, 0.98);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 48px rgba(0,0,0,0.7), 0 0 0 1px rgba(56,189,248,0.05);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  z-index: 200;
  /* Invisible bridge so mouse can travel from button to panel */
  margin-top: 0;
}

/* Invisible hover bridge between button and dropdown */
.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0; right: 0;
  height: 10px;
}

.nav-demo-wrapper:hover .nav-dropdown,
.nav-demo-wrapper.open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Divider label inside dropdown */
.nav-dropdown-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.35rem 0.6rem 0.5rem;
  opacity: 0.6;
}

/* Each item in the dropdown */
.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--light);
  transition: all 0.15s ease;
  text-decoration: none;
  border: 1px solid transparent;
}

.nav-dropdown-item:hover {
  background: var(--gold-pale);
  border-color: rgba(56,189,248,0.2);
  color: var(--gold);
}

.nav-dropdown-item-icon {
  font-size: 1rem;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

.nav-dropdown-item-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.nav-dropdown-item-name {
  color: inherit;
  line-height: 1;
}

.nav-dropdown-item-sub {
  font-size: 0.58rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  line-height: 1;
  transition: color 0.15s ease;
}

.nav-dropdown-item:hover .nav-dropdown-item-sub {
  color: rgba(56,189,248,0.6);
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 0.4rem 0.5rem;
}

/* Mobile: show dropdown as stacked links below the main demo link */
@media (max-width: 768px) {
  .nav-demo-wrapper {
    width: 100%;
    margin-left: 0;
  }

  .nav-demo {
    width: 100%;
    justify-content: space-between;
  }

  .nav-dropdown {
    position: static;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    box-shadow: none;
    border: none;
    border-top: 1px solid var(--border);
    border-radius: 0;
    background: transparent;
    backdrop-filter: none;
    padding: 0.25rem 0 0.25rem 1rem;
    display: none;
  }

  .nav-demo-wrapper.open .nav-dropdown {
    display: block;
  }

  .nav-dropdown::before { display: none; }
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--gold);
  font-size: 1.4rem;
  cursor: pointer;
}

/* Logo color rules removed — logos are now image assets (see BRAND ASSET STYLES) */

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 60px 2rem 140px;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,175,100,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,175,100,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 80%);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: orbDrift 20s ease-in-out infinite;
}

.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #1e40af 0%, #0ea5e9 40%, transparent 70%);
  top: -200px; left: -150px;
  animation-delay: 0s;
  opacity: 0.28;
}
.orb-2 {
  width: 450px; height: 450px;
  background: radial-gradient(circle, #7c3aed 0%, #a78bfa 40%, transparent 70%);
  bottom: -100px; right: -100px;
  animation-delay: -7s;
  opacity: 0.22;
}
.orb-3 {
  width: 320px; height: 320px;
  background: radial-gradient(circle, #0284c7 0%, #38bdf8 40%, transparent 70%);
  top: 40%; left: 60%;
  animation-delay: -14s;
  opacity: 0.15;
}

@keyframes orbDrift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 30px) scale(0.95); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-publisher {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
}

.hero-publisher-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  opacity: 0.72;
  transition: opacity 0.2s ease;
}

.hero-publisher-link:hover { opacity: 1; }

.hero-publisher-logo {
  height: 65px;
  width: auto;
  object-fit: contain;
  mix-blend-mode: screen;
  filter: brightness(0.9) saturate(0.7);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s ease both;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 900;
  letter-spacing: 0.05em;
  line-height: 1;
  margin-bottom: 1rem;
  animation: fadeUp 0.8s 0.1s ease both;
}

.hero-etymology {
  font-family: var(--font-body);
  font-style: italic;
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s 0.2s ease both;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--light);
  margin-bottom: 2.5rem;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeUp 0.8s 0.3s ease both;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  animation: fadeUp 0.8s 0.4s ease both;
}

.hero-platforms {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.5s ease both;
}

.platform-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 20px;
}

.platform-tag.coming { opacity: 0.6; font-style: italic; }

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--gold);
  opacity: 0.4;
  font-size: 1.5rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── BUTTONS ── */
.btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.8rem 2rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
  font-weight: 700;
}
.btn-primary:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  box-shadow: 0 0 30px var(--gold-glow);
  color: var(--ink);
  transform: translateY(-2px);
}

.btn-ks {
  background: var(--ks-green) !important;
  color: var(--ink) !important;
  border-color: var(--ks-green) !important;
}
.btn-ks:hover {
  background: #22d468 !important;
  box-shadow: 0 0 30px var(--ks-glow) !important;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--light);
  border-color: var(--border-bright);
}
.btn-ghost:hover {
  background: var(--surface);
  border-color: var(--gold);
  color: var(--gold);
}

.btn-outline {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold);
}
.btn-outline:hover {
  background: var(--gold-pale);
  box-shadow: var(--shadow-gold);
}

.btn-icon { font-size: 1rem; }

/* ── KICKSTARTER BAND ── */
.ks-band {
  background: linear-gradient(135deg, rgba(43, 222, 115, 0.08), rgba(43, 222, 115, 0.03));
  border-top: 1px solid rgba(43, 222, 115, 0.3);
  border-bottom: 1px solid rgba(43, 222, 115, 0.3);
  padding: 3rem 2rem;
}

.ks-band-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
}

.ks-badge {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  background: var(--ks-green);
  color: var(--ink);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  white-space: nowrap;
}

.ks-band h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--ks-green);
  margin-bottom: 0.5rem;
}

.ks-band p {
  color: var(--light);
  font-size: 0.95rem;
  max-width: 600px;
}

.btn-ks-big {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  background: var(--ks-green);
  color: var(--ink) !important;
  border: none;
  padding: 1rem 2rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-ks-big:hover {
  background: #22d468;
  box-shadow: 0 0 40px var(--ks-glow);
  transform: translateY(-2px);
}

.ks-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 400;
  opacity: 0.7;
  letter-spacing: 0.05em;
}

/* ── SECTIONS ── */
.section {
  padding: 6rem 0;
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  color: var(--paper);
  line-height: 1.2;
  margin-bottom: 2rem;
}

.section-cta {
  text-align: center;
  margin-top: 3rem;
}

/* ── TWO COL ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.col-text p {
  color: var(--light);
  margin-bottom: 1.25rem;
}

.link-arrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.founder-quote {
  background: var(--surface);
  border-left: 3px solid var(--gold);
  padding: 2rem;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  font-style: italic;
  color: var(--light);
  position: relative;
}

.founder-quote::before {
  content: '"';
  position: absolute;
  top: -0.5rem;
  left: 1.5rem;
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--gold);
  opacity: 0.3;
  line-height: 1;
}

.founder-quote cite {
  display: block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-style: normal;
  letter-spacing: 0.1em;
  color: var(--gold);
  opacity: 0.8;
}

.founder-quote-large {
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ── FEATURE GRID ── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-card-hero {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: start;
  background: linear-gradient(135deg, var(--surface2), var(--surface));
  border-color: var(--border-bright);
}

.feature-card-hero h3 {
  grid-column: 2;
}

.feature-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

.feature-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  grid-column: 1 / -1;
}

.feature-tags span {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  background: var(--gold-pale);
  color: var(--gold);
  border: 1px solid var(--border-bright);
  padding: 3px 8px;
  border-radius: 20px;
}

/* ── EDITIONS ── */
.editions-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.edition-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
}

.edition-highlight {
  border-color: var(--gold);
  background: linear-gradient(145deg, var(--surface2), var(--surface));
  box-shadow: var(--shadow-gold);
}

.edition-tier {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.edition-price {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 1rem;
}

.edition-card p { font-size: 0.9rem; color: var(--muted); }

/* ── FOR GRID ── */
.for-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.for-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition);
}

.for-item:hover { border-color: var(--border-bright); }

.for-icon { font-size: 2rem; margin-bottom: 0.75rem; }

.for-item h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.for-item p { font-size: 0.85rem; color: var(--muted); }

/* ── VISION PILLS ── */
.vision-intro { color: var(--light); max-width: 700px; margin-bottom: 2rem; }

.vision-pills {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  background: var(--teal-pale);
  color: var(--teal);
  border: 1px solid rgba(78, 205, 196, 0.3);
  padding: 6px 14px;
  border-radius: 20px;
}

/* ── KS BOTTOM CTA ── */
.section-ks-bottom {
  background: linear-gradient(180deg, var(--deep), var(--midnight));
}

.ks-bottom-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.ks-bottom-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--paper);
  margin-bottom: 1rem;
}

.ks-bottom-inner p {
  color: var(--muted);
  margin-bottom: 2rem;
  font-size: 1rem;
}

/* ── FOOTER ── */
.footer {
  background: var(--ink);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.08em;
}

.footer-brand p {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-top: 0.25rem;
}

.footer-nav {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--gold); }

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: rgba(120, 130, 153, 0.5);
}
.footer-copy a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-copy a:hover { color: rgba(120, 130, 153, 0.85); }

/* ── PAGE HEADERS ── */
.page-header {
  padding: 160px 0 80px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.page-header-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  color: var(--gold);
  margin-bottom: 1rem;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 600px;
}

/* ── FEATURE DETAIL SECTIONS ── */
.feature-detail {
  max-width: 900px;
}

.feature-detail-header {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.fd-icon {
  font-size: 3rem;
  line-height: 1;
}

.fd-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.25rem;
}

.feature-detail h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--paper);
}

.feature-lead {
  font-size: 1.1rem;
  color: var(--light);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.feature-detail-body p {
  color: var(--muted);
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.fd-col h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 1rem;
}

.fd-col p { color: var(--muted); line-height: 1.8; }

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.feature-list li {
  color: var(--muted);
  font-size: 0.9rem;
  padding-left: 1.2rem;
  position: relative;
}

.feature-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--gold);
}

.detail-callout {
  background: var(--surface);
  border: 1px solid var(--border-bright);
  border-left: 3px solid var(--gold);
  padding: 2rem;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin-bottom: 2.5rem;
}

.detail-callout h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.detail-callout p { color: var(--light); line-height: 1.8; margin-bottom: 0.75rem; }

/* ── QUIZ MODES ── */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.mode-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.mode-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.mode-card p { font-size: 0.85rem; color: var(--muted); }

/* ── FLASHCARD PROGRESSION ── */
.modes-progression {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.mode-step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.mode-num {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--gold);
  background: var(--gold-pale);
  border: 1px solid var(--border-bright);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mode-info strong {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--paper);
  display: block;
  margin-bottom: 0.25rem;
}

.mode-info p { font-size: 0.85rem; color: var(--muted); }

/* ── PROVIDER ROW ── */
.provider-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1rem 0 1.5rem;
}

.provider-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  background: var(--teal-pale);
  color: var(--teal);
  border: 1px solid rgba(78, 205, 196, 0.3);
  padding: 5px 12px;
  border-radius: 4px;
}

/* ── FORMAT GRID ── */
.format-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.format-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.format-card-open { border-color: rgba(78, 205, 196, 0.3); }

.format-ext {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--gold);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.format-card h3 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--paper);
  margin-bottom: 0.75rem;
}

.format-card p { font-size: 0.85rem; color: var(--muted); line-height: 1.7; }

/* ── TIMELINE ── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  padding-left: 3rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 1rem;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--gold), var(--teal), transparent);
  opacity: 0.3;
}

.timeline-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  position: relative;
}

.timeline-marker {
  position: absolute;
  left: -2.5rem;
  top: 0.25rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--surface);
  border: 2px solid var(--border-bright);
  color: var(--gold);
}

.timeline-ready .timeline-marker {
  background: var(--gold-pale);
  border-color: var(--gold);
  color: var(--gold);
}

.timeline-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  flex: 1;
}

.timeline-status {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
}

.status-done { background: rgba(200,175,100,0.15); color: var(--gold); }
.status-near { background: rgba(78,205,196,0.15); color: var(--teal); }
.status-planned { background: rgba(244,162,97,0.15); color: var(--amber); }

.timeline-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--paper);
  margin-bottom: 0.75rem;
}

.timeline-content p { color: var(--muted); font-size: 0.9rem; line-height: 1.7; }

/* ── VISION DETAIL BOX ── */
.vision-detail-box {
  background: var(--surface2);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.vision-detail-box h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--gold);
  margin-bottom: 1rem;
}

.sub-tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.sub-tier {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.sub-tier-highlight { border-color: var(--gold); }

.sub-name {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--paper);
  margin-bottom: 0.25rem;
}

.sub-price {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--gold);
  margin-bottom: 0.25rem;
}

.sub-desc { font-size: 0.75rem; color: var(--muted); }

/* ── BADGE GRID ── */
.badge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.badge-item p { font-size: 0.8rem; color: var(--muted); margin-top: 0.5rem; }

.badge-name {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
}

.badge-official-pub { background: rgba(200,175,100,0.2); color: var(--gold); border: 1px solid rgba(200,175,100,0.4); }
.badge-official-auth { background: rgba(78,205,196,0.2); color: var(--teal); border: 1px solid rgba(78,205,196,0.4); }
.badge-institution { background: rgba(244,162,97,0.2); color: var(--amber); border: 1px solid rgba(244,162,97,0.4); }
.badge-educator { background: rgba(100,180,200,0.15); color: #64b4c8; border: 1px solid rgba(100,180,200,0.3); }
.badge-community { background: rgba(130,140,170,0.15); color: #8a8fa8; border: 1px solid rgba(130,140,170,0.3); }

/* ── CREDIT BUNDLES ── */
.credit-bundles {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.credit-bundle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all var(--transition);
}

.credit-bundle:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
}

.credit-bundle-highlight {
  border-color: var(--gold);
  background: var(--surface2);
}

.bundle-name {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.bundle-price {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--gold);
  margin-bottom: 0.25rem;
}

.bundle-credits {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--teal);
}

/* ── INSTITUTION GRID ── */
.institution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.institution-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.institution-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--paper);
  margin-bottom: 0.5rem;
}

.institution-stat {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--teal);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.institution-card p { color: var(--muted); font-size: 0.9rem; line-height: 1.7; margin-bottom: 0.75rem; }

.institution-value {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--gold);
  background: var(--gold-pale);
  border: 1px solid var(--border-bright);
  padding: 8px 12px;
  border-radius: var(--radius);
  margin-top: 1rem;
}

/* ── PRICING CARDS ── */
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
}

.pricing-card-highlight {
  border-color: var(--gold);
  background: linear-gradient(160deg, var(--surface2) 0%, var(--surface) 100%);
  box-shadow: var(--shadow-gold);
}

.pricing-tier-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--teal);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.pricing-popular {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  background: var(--gold);
  color: var(--ink);
  padding: 3px 10px;
  border-radius: 20px;
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}

.pricing-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--paper);
  margin-bottom: 0.25rem;
}

.pricing-price {
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 1.25rem;
}

.pricing-desc {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.pricing-features li {
  font-size: 0.85rem;
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.5;
}

.feat-yes { color: var(--light); }
.feat-yes::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-size: 0.75rem;
}

.feat-no { color: rgba(120, 130, 153, 0.4); }
.feat-no::before {
  content: '—';
  position: absolute;
  left: 0;
  color: rgba(120, 130, 153, 0.3);
  font-size: 0.75rem;
}

.pricing-note {
  font-size: 0.75rem;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.pricing-btn { width: 100%; justify-content: center; }

/* ── DISCOUNT TABLE ── */
.discount-table-wrap { margin-top: 2rem; overflow-x: auto; }

.discount-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.discount-table th {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface);
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.discount-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--light);
}

.discount-table tr:hover td { background: var(--surface); }

.table-row-special td {
  color: var(--gold);
  font-style: italic;
}

.table-note {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
}

/* ── MARKET STATS ── */
.market-callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-top: 3rem;
}

.market-callout h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--paper);
  margin-bottom: 1.5rem;
}

.market-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.market-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.market-label {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}

/* ── POLICY GRID ── */
.policy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.policy-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
}

.policy-icon {
  font-size: 2rem;
  font-family: var(--font-display);
  color: var(--gold);
  margin-bottom: 1rem;
}

.policy-card h3 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--paper);
  margin-bottom: 0.75rem;
}

.policy-card p { font-size: 0.85rem; color: var(--muted); line-height: 1.7; }

/* ── ABOUT PAGE ── */
.about-intro {
  max-width: 800px;
}

.about-intro p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.background-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.background-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.bg-icon { font-size: 2rem; margin-bottom: 0.75rem; }

.background-item h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.background-item p { font-size: 0.9rem; color: var(--muted); line-height: 1.7; margin-bottom: 0.5rem; }

.about-highlight-block {
  max-width: 850px;
}

.about-highlight-block h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--paper);
  margin-bottom: 1.5rem;
}

.about-highlight-block p {
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.credential-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.credential-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  background: var(--surface);
  color: var(--gold);
  border: 1px solid var(--border-bright);
  padding: 4px 10px;
  border-radius: 4px;
}

.fine-print {
  font-size: 0.78rem !important;
  font-style: italic;
  color: rgba(120, 130, 153, 0.6) !important;
  line-height: 1.6 !important;
  margin-top: 0.75rem;
}

/* ── MOBILE NAV ── */
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--ink); padding: 1rem; flex-direction: column; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }

  .hero-cta-group { flex-direction: column; align-items: center; }

  .ks-band-inner { grid-template-columns: 1fr; text-align: center; }
  .ks-badge { display: inline-block; }

  .two-col { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card-hero { grid-template-columns: 1fr; }
  .editions-row { grid-template-columns: 1fr; }
  .for-grid { grid-template-columns: 1fr 1fr; }
  .feature-detail-grid { grid-template-columns: 1fr; }
  .mode-grid { grid-template-columns: 1fr; }
  .format-grid { grid-template-columns: 1fr; }
  .sub-tiers { grid-template-columns: 1fr; }
  .badge-grid { grid-template-columns: 1fr; }
  .credit-bundles { grid-template-columns: 1fr 1fr; }
  .institution-grid { grid-template-columns: 1fr; }
  .pricing-cards { grid-template-columns: 1fr; }
  .market-stats { grid-template-columns: 1fr 1fr; }
  .policy-grid { grid-template-columns: 1fr; }
  .background-grid { grid-template-columns: 1fr; }
  .timeline { padding-left: 2rem; }
}

@media (max-width: 480px) {
  .for-grid { grid-template-columns: 1fr; }
  .credit-bundles { grid-template-columns: 1fr; }
  .market-stats { grid-template-columns: 1fr; }
}

/* ============================================================
   DEMO PAGES — styles for demo-hub.html, demo-quiz.html,
   demo-flashcard.html, demo-coach.html
   ============================================================ */

/* ── DEMO HUB — landing for the three engines ── */
.demo-hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.demo-engine-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}

.demo-engine-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.5), 0 0 0 1px rgba(56,189,248,0.1);
}

.demo-card-preview {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Quiz preview gradient */
.demo-card-preview.quiz-preview {
  background: linear-gradient(135deg, #0d1f3c 0%, #0a1628 50%, #111827 100%);
}

/* Flashcard preview gradient */
.demo-card-preview.flash-preview {
  background: linear-gradient(135deg, #1a0d3c 0%, #120a28 50%, #1a1127 100%);
}

/* Coach preview gradient */
.demo-card-preview.coach-preview {
  background: linear-gradient(135deg, #0d2020 0%, #0a1a1a 50%, #111820 100%);
}

/* Decorative UI sketch inside each card preview */
.preview-sketch {
  width: 85%;
  border-radius: 6px;
  border: 1px solid rgba(56,189,248,0.2);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}

.preview-sketch-bar {
  height: 28px;
  background: rgba(30,35,51,0.95);
  border-bottom: 1px solid rgba(56,189,248,0.15);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
}

.ps-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
}
.ps-dot.red   { background: #ef4444; }
.ps-dot.amber { background: #f59e0b; }
.ps-dot.green { background: #22c55e; }

.ps-title {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-left: auto;
  margin-right: auto;
}

.preview-sketch-body {
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(15,18,28,0.9);
}

.ps-row {
  height: 8px;
  border-radius: 3px;
  background: rgba(56,189,248,0.12);
}
.ps-row.short { width: 55%; }
.ps-row.medium { width: 75%; }
.ps-row.full { width: 100%; }
.ps-row.accent { background: rgba(56,189,248,0.28); width: 40%; }
.ps-row.purple { background: rgba(167,139,250,0.22); width: 60%; }

.ps-checkbox-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ps-checkbox {
  width: 10px; height: 10px;
  border-radius: 2px;
  border: 1px solid rgba(30,144,255,0.5);
  flex-shrink: 0;
}
.ps-checkbox.checked {
  background: #1e90ff;
  border-color: #1e90ff;
}

.ps-label {
  height: 7px;
  border-radius: 3px;
  background: rgba(194,204,232,0.15);
  flex: 1;
}

.ps-btn {
  height: 20px;
  border-radius: 4px;
  background: linear-gradient(90deg, #1e40af, #0ea5e9);
  margin-top: 4px;
  width: 100%;
  opacity: 0.85;
}

/* Flashcard sketch specific */
.ps-card-face {
  height: 50px;
  border-radius: 4px;
  border: 1px solid rgba(167,139,250,0.3);
  background: rgba(124,58,237,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 4px 0;
}

.ps-card-text {
  width: 60%;
  height: 7px;
  border-radius: 3px;
  background: rgba(167,139,250,0.25);
}

/* Coach sketch specific */
.ps-chat-bubble {
  border-radius: 8px;
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ps-chat-bubble.user {
  background: rgba(56,189,248,0.12);
  margin-left: 15%;
  border-bottom-right-radius: 2px;
}
.ps-chat-bubble.ai {
  background: rgba(167,139,250,0.1);
  margin-right: 15%;
  border-bottom-left-radius: 2px;
}
.ps-chat-line {
  height: 6px;
  border-radius: 3px;
  background: currentColor;
  opacity: 0.3;
}
.ps-chat-bubble.user .ps-chat-line { color: #38bdf8; }
.ps-chat-bubble.ai .ps-chat-line { color: #a78bfa; }

.demo-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.demo-card-engine-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.demo-engine-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--paper);
  margin-bottom: 0.75rem;
}

.demo-engine-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1.5rem;
}

.demo-card-features {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
}

.demo-card-features span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--light);
  padding-left: 1.1rem;
  position: relative;
  opacity: 0.8;
}

.demo-card-features span::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--gold);
}

.btn-demo {
  background: linear-gradient(90deg, #1e3a8a, #0369a1);
  color: #e0f2fe !important;
  border: 1px solid rgba(56,189,248,0.3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  transition: all 0.25s ease;
  display: block;
  width: 100%;
}

.btn-demo:hover {
  background: linear-gradient(90deg, #1d4ed8, #0284c7);
  border-color: rgba(56,189,248,0.6);
  box-shadow: 0 0 24px rgba(56,189,248,0.2);
  color: #fff !important;
}

/* Coming-soon card variant */
.demo-engine-card.coming-soon {
  opacity: 0.65;
  pointer-events: none;
}

.demo-coming-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  background: rgba(167,139,250,0.2);
  color: var(--teal);
  border: 1px solid rgba(167,139,250,0.35);
  padding: 3px 8px;
  border-radius: 20px;
}

/* Dataset picker info panel */
.demo-picker-info {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 1.5rem 2rem;
  margin-top: 3rem;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.demo-picker-info .dpi-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.demo-picker-info h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--gold);
  margin-bottom: 0.35rem;
}

.demo-picker-info p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── DEMO FRAME PAGES (quiz / flashcard / coach) ── */
.demo-page-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - 64px);
  margin-top: 64px;
}

/* Left sidebar — dataset picker */
.demo-sidebar {
  background: var(--deep);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
}

.demo-sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.demo-sidebar-header h2 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--paper);
  margin-bottom: 0.25rem;
}

.demo-sidebar-header p {
  font-size: 0.72rem;
  color: var(--muted);
}

.demo-sidebar-section {
  padding: 1rem 1.5rem 0.5rem;
}

.demo-sidebar-section-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.dataset-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 1rem;
}

.dataset-item {
  border-radius: var(--radius);
  padding: 0.65rem 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.dataset-item:hover {
  background: var(--surface);
  border-color: var(--border);
}

.dataset-item.active {
  background: var(--app-blue-pale);
  border-color: rgba(30,144,255,0.4);
}

.dataset-item-name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--light);
  line-height: 1.3;
}

.dataset-item.active .dataset-item-name {
  color: #7dd3fc;
}

.dataset-item-meta {
  font-size: 0.65rem;
  color: var(--muted);
}

.dataset-item-tag {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  padding: 1px 6px;
  border-radius: 10px;
  display: inline-block;
  margin-top: 0.2rem;
}

.tag-security { background: rgba(239,68,68,0.15); color: #fca5a5; }
.tag-business { background: rgba(34,197,94,0.12); color: #86efac; }
.tag-it       { background: rgba(56,189,248,0.12); color: #7dd3fc; }
.tag-history  { background: rgba(251,191,36,0.12); color: #fde68a; }
.tag-science  { background: rgba(167,139,250,0.12); color: #c4b5fd; }
.tag-language { background: rgba(244,114,182,0.12); color: #f9a8d4; }

/* Sidebar engine switcher */
.demo-engine-switcher {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.demo-engine-switcher-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.engine-switch-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.engine-switch-btn:hover {
  background: var(--surface);
  border-color: var(--border);
  color: var(--light);
}

.engine-switch-btn.current {
  background: var(--app-blue-pale);
  border-color: rgba(30,144,255,0.35);
  color: #7dd3fc;
}

.engine-switch-icon { font-size: 1rem; }

/* Right content — the demo frame area */
.demo-frame-area {
  display: flex;
  flex-direction: column;
  background: var(--midnight);
}

.demo-frame-topbar {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--deep);
  flex-shrink: 0;
}

.demo-frame-topbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.demo-frame-engine-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--paper);
}

.demo-frame-engine-badge {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--app-blue-pale);
  color: var(--gold);
  border: 1px solid rgba(56,189,248,0.25);
  padding: 3px 10px;
  border-radius: 20px;
}

.demo-dataset-indicator {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
}

.demo-dataset-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ks-green);
  box-shadow: 0 0 6px var(--ks-green);
}

/* The iframe / placeholder frame itself */
.demo-frame-container {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.demo-frame-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 4rem 2rem;
  min-height: 560px;
  position: relative;
  overflow: hidden;
}

/* Blueprint grid pattern */
.demo-frame-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56,189,248,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.demo-placeholder-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 540px;
}

.demo-placeholder-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  opacity: 0.7;
  display: block;
}

.demo-placeholder-inner h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--paper);
  margin-bottom: 0.75rem;
}

.demo-placeholder-inner p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

/* Pulsing ring animation for placeholder */
.demo-pulse-ring {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 2px solid rgba(56,189,248,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  position: relative;
  animation: pulseRing 3s ease-in-out infinite;
}

.demo-pulse-ring::before,
.demo-pulse-ring::after {
  content: '';
  position: absolute;
  inset: -15px;
  border-radius: 50%;
  border: 1px solid rgba(56,189,248,0.15);
  animation: pulseRing 3s ease-in-out infinite;
}

.demo-pulse-ring::after {
  inset: -30px;
  animation-delay: 0.5s;
}

@keyframes pulseRing {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.05); }
}

.demo-placeholder-iframe-note {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: rgba(107, 122, 153, 0.6);
  border: 1px dashed rgba(56,189,248,0.15);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  margin-top: 1rem;
  text-align: left;
  line-height: 1.6;
}

/* The actual iframe that will slot in when ready */
.demo-iframe {
  width: 100%;
  flex: 1;
  min-height: 600px;
  border: none;
  display: block;
}

/* Dataset info strip below the frame */
.demo-dataset-strip {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.demo-dataset-strip-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.demo-dataset-strip-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--paper);
}

.demo-dataset-strip-desc {
  font-size: 0.75rem;
  color: var(--muted);
}

.demo-dataset-strip-stats {
  display: flex;
  gap: 1.5rem;
}

.strip-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
}

.strip-stat-value {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gold);
}

.strip-stat-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ── DEMO HUB RESPONSIVE ── */
@media (max-width: 960px) {
  .demo-hub-grid { grid-template-columns: 1fr; max-width: 500px; margin-left: auto; margin-right: auto; }
  .demo-page-layout { grid-template-columns: 1fr; }
  .demo-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 360px;
    overflow-y: auto;
  }
  .demo-engine-switcher { flex-direction: row; flex-wrap: wrap; gap: 0.5rem; }
}

@media (max-width: 600px) {
  .demo-frame-topbar { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .demo-dataset-strip { flex-direction: column; align-items: flex-start; }
  .demo-dataset-strip-stats { gap: 1rem; }
}

/* ============================================================
   BRAND ASSET STYLES
   ============================================================ */

/* ── NAV LOGO — favicon + name wordmark ── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
  /* Establish stacking context so screen blend composites against the nav bg,
     not the page content behind the translucent nav */
  isolation: isolate;
}

.nav-logo-icon {
  height: 28px;
  width: 28px;
  object-fit: contain;
  flex-shrink: 0;
  /* favicon has proper alpha from the ICO format — no blend needed */
}

.nav-logo-name {
  height: 18px;
  width: auto;
  object-fit: contain;
  /* JPEG with black bg — screen blend removes black reliably on dark backgrounds */
  mix-blend-mode: screen;
  filter: brightness(1.15) contrast(1.1);
  flex-shrink: 0;
}

/* ── HERO LOGO — full stacked cgnt.png ── */
.hero-logo-wrap {
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s 0.1s ease both;
}

.hero-logo-img {
  mix-blend-mode: screen;
  height: clamp(220px, 28vw, 340px);
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 0 60px rgba(100, 80, 220, 0.35))
          drop-shadow(0 0 30px rgba(56, 189, 248, 0.2));
}

/* ── FOOTER BRAND ── */
.footer-brand-logos {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  /* Isolate so screen blend composites against --ink (#080a0f), not page content */
  isolation: isolate;
}

.footer-cgnt-mark {
  height: 22px;
  width: auto;
  object-fit: contain;
  mix-blend-mode: screen;
  filter: brightness(1.05) contrast(1.05);
}

.footer-brand-sep {
  color: var(--muted);
  opacity: 0.4;
  font-size: 1.1rem;
  line-height: 1;
}

.footer-tw-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  opacity: 1;
  transition: opacity 0.2s ease;
}
.footer-tw-link:hover { opacity: 0.85; }

.footer-tw-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
  mix-blend-mode: screen;
  filter: brightness(0.85) saturate(0.75);
  opacity: 0.8;
  transition: opacity 0.2s ease, filter 0.2s ease;
}

.footer-tw-logo:hover {
  opacity: 1;
  filter: brightness(1) saturate(1);
}

.footer-brand p {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-top: 0.5rem;
  opacity: 0.6;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-logo-name {
    height: 15px;
  }
  .nav-logo-icon {
    height: 24px;
    width: 24px;
  }
  .hero-logo-img {
    height: clamp(160px, 55vw, 260px);
  }
}