/* ============================================
   /learnai/kids — LearnAI4Kids visual language
   Warmer paper, bigger type, bolder interactions.
   Depends on learnai-fonts.css (self-hosted).
   ============================================ */

:root {
  --lk-paper: #fdf8ec;
  --lk-paper-deep: #f4ecd7;
  --lk-paper-rule: #e8dcb8;
  --lk-ink: #1a1a1a;
  --lk-ink-soft: #3a3a3a;
  --lk-ink-fade: #7a7a7a;
  --lk-ink-faintest: #c8beaa;

  /* Room accents — warmer, more colorful than adult site */
  --lk-r1: #d88a0a;  /* ochre */
  --lk-r2: #c64545;  /* crimson */
  --lk-r3: #4a8a5f;  /* sage */
  --lk-r4: #3872b8;  /* blue */
  --lk-r5: #b8821e;  /* gold */

  --lk-accent: var(--lk-r1);
  --lk-accent-soft: rgba(216, 138, 10, 0.12);

  --lk-display: 'Fraunces', 'Times New Roman', Georgia, serif;
  --lk-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --lk-mono: 'JetBrains Mono', 'Courier New', monospace;
}

/* Per-room accent overrides */
body[data-accent="1"]  { --lk-accent: var(--lk-r1); --lk-accent-soft: rgba(216,138,10,0.12); }
body[data-accent="2"]  { --lk-accent: var(--lk-r2); --lk-accent-soft: rgba(198,69,69,0.12); }
body[data-accent="3"]  { --lk-accent: var(--lk-r3); --lk-accent-soft: rgba(74,138,95,0.12); }
body[data-accent="4"]  { --lk-accent: var(--lk-r4); --lk-accent-soft: rgba(56,114,184,0.12); }
body[data-accent="5"]  { --lk-accent: var(--lk-r5); --lk-accent-soft: rgba(184,130,30,0.12); }

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

.lk-page {
  background: var(--lk-paper);
  color: var(--lk-ink);
  font-family: var(--lk-body);
  font-size: 18px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--lk-accent); text-decoration: none; transition: color 0.15s; }
a:hover { text-decoration: underline; }

/* ============================================
   Top nav
   ============================================ */

.lk-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(253, 248, 236, 0.94);
  backdrop-filter: blur(10px) saturate(1.2);
  border-bottom: 2px solid var(--lk-paper-rule);
}

.lk-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.lk-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--lk-display);
  font-weight: 500;
  font-size: 1.2rem;
  color: var(--lk-ink);
  letter-spacing: -0.01em;
  text-decoration: none;
}
.lk-brand:hover { text-decoration: none; }

.lk-brand-mark {
  width: 38px;
  height: 38px;
  color: var(--lk-accent);
  flex-shrink: 0;
}
.lk-brand-mark svg { width: 100%; height: 100%; display: block; }

.lk-brand-sub {
  color: var(--lk-ink-fade);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  font-weight: 500;
  font-family: var(--lk-body);
  margin-left: 0.2rem;
}

.lk-nav-links {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  font-size: 0.95rem;
  align-items: center;
  flex-wrap: wrap;
}
.lk-nav-links a {
  color: var(--lk-ink-soft);
  font-weight: 500;
}
.lk-nav-links a:hover, .lk-nav-links a.active {
  color: var(--lk-ink);
  text-decoration: none;
}
.lk-nav-links a.lk-back {
  color: var(--lk-ink-fade);
  font-size: 0.85rem;
}

/* ============================================
   Containers
   ============================================ */

.lk-wrap { max-width: 860px; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }
.lk-wrap-wide { max-width: 1100px; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }

/* ============================================
   Hero illustration banner (above hero text)
   ============================================ */

.lk-hero-img {
  margin: 1.5rem 0 0;
  border-radius: 18px;
  overflow: hidden;
  border: 2px solid var(--lk-paper-rule);
  background: var(--lk-paper-deep);
  box-shadow: 0 22px 60px -32px rgba(60, 40, 0, 0.22);
  aspect-ratio: 16 / 9;
  display: block;
}
.lk-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ============================================
   Hero
   ============================================ */

.lk-hero { padding: 3.5rem 0 2rem; text-align: left; }

.lk-hero-eyebrow {
  display: inline-block;
  font-family: var(--lk-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lk-accent);
  margin-bottom: 1rem;
}

.lk-hero h1 {
  font-family: var(--lk-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--lk-ink);
  margin-bottom: 1.2rem;
}
.lk-hero h1 em {
  font-style: italic;
  color: var(--lk-accent);
}

.lk-hero .lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--lk-ink-soft);
  max-width: 620px;
  margin-bottom: 1.5rem;
}

/* ============================================
   Age picker cards (landing)
   ============================================ */

.lk-agepicker {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 2rem 0 3rem;
}

@media (max-width: 720px) {
  .lk-agepicker { grid-template-columns: 1fr; }
}

.lk-age-card {
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 16px;
  padding: 1.6rem 1.5rem;
  text-decoration: none;
  color: var(--lk-ink);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  cursor: pointer;
}
.lk-age-card:hover {
  transform: translateY(-3px);
  border-color: var(--lk-accent);
  box-shadow: 0 15px 40px -20px rgba(0,0,0,0.2);
  text-decoration: none;
}

.lk-age-icon {
  width: 56px;
  height: 56px;
  color: var(--lk-accent);
  margin-bottom: 0.2rem;
}

.lk-age-label {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  font-weight: 600;
}

.lk-age-title {
  font-family: var(--lk-display);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--lk-ink);
  line-height: 1.2;
}

.lk-age-desc {
  font-size: 0.94rem;
  color: var(--lk-ink-soft);
  line-height: 1.5;
}

/* ============================================
   Room preview cards
   ============================================ */

.lk-rooms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.9rem;
  margin: 2rem 0;
}

.lk-room-card {
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 14px;
  padding: 1.4rem 1.3rem;
  text-decoration: none;
  color: var(--lk-ink);
  transition: transform 0.15s, box-shadow 0.15s;
  display: block;
  position: relative;
}
.lk-room-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -18px rgba(0,0,0,0.2);
  text-decoration: none;
}
.lk-room-card[data-disabled] {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}
.lk-room-card[data-disabled]::after {
  content: 'Coming soon';
  position: absolute;
  top: 0.7rem;
  right: 0.8rem;
  font-family: var(--lk-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  background: var(--lk-paper-deep);
  padding: 0.25rem 0.5rem;
  border-radius: 10px;
}

.lk-room-num {
  font-family: var(--lk-display);
  font-weight: 400;
  font-size: 2rem;
  color: var(--lk-room-accent, var(--lk-accent));
  line-height: 1;
  margin-bottom: 0.3rem;
  letter-spacing: -0.02em;
}
.lk-room-card[data-room="1"] { --lk-room-accent: var(--lk-r1); }
.lk-room-card[data-room="2"] { --lk-room-accent: var(--lk-r2); }
.lk-room-card[data-room="3"] { --lk-room-accent: var(--lk-r3); }
.lk-room-card[data-room="4"] { --lk-room-accent: var(--lk-r4); }
.lk-room-card[data-room="5"] { --lk-room-accent: var(--lk-r5); }

.lk-room-title {
  font-family: var(--lk-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--lk-ink);
  margin-bottom: 0.4rem;
  line-height: 1.2;
}
.lk-room-desc {
  font-size: 0.9rem;
  color: var(--lk-ink-soft);
  line-height: 1.5;
}

/* ============================================
   Exhibit scaffold (the shared pattern)
   ============================================ */

.lk-exhibit {
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 18px;
  padding: 0;
  margin: 2rem 0;
  overflow: hidden;
  box-shadow: 0 20px 50px -30px rgba(0,0,0,0.15);
}

.lk-exhibit-head {
  padding: 1.6rem 1.8rem 1.2rem;
  background: linear-gradient(180deg, var(--lk-accent-soft) 0%, transparent 100%);
  border-bottom: 2px solid var(--lk-paper-rule);
}
.lk-exhibit-head:has(.lk-exhibit-illus) {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.2rem;
  align-items: center;
}
.lk-exhibit-head-text { min-width: 0; }
.lk-exhibit-illus {
  width: 140px;
  height: 140px;
  flex-shrink: 0;
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  box-shadow: 0 12px 30px -18px rgba(60, 40, 0, 0.25);
}
.lk-exhibit-illus img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
@media (max-width: 600px) {
  .lk-exhibit-head { grid-template-columns: auto 1fr; gap: 0.9rem; }
  .lk-exhibit-illus { width: 88px; height: 88px; border-radius: 10px; }
}

.lk-exhibit-num {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lk-accent);
  margin-bottom: 0.5rem;
}

.lk-exhibit-title {
  font-family: var(--lk-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  line-height: 1.15;
  color: var(--lk-ink);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}
.lk-exhibit-title em { font-style: italic; color: var(--lk-accent); }

.lk-exhibit-sub {
  font-size: 1rem;
  color: var(--lk-ink-soft);
  line-height: 1.55;
  max-width: 54ch;
}

.lk-exhibit-body { padding: 1.8rem 1.8rem 1.4rem; }

.lk-exhibit-footer {
  padding: 1.2rem 1.8rem 1.6rem;
  background: var(--lk-paper-deep);
  border-top: 2px solid var(--lk-paper-rule);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.lk-parent-note {
  font-size: 0.88rem;
  color: var(--lk-ink-soft);
  line-height: 1.55;
  border-left: 3px solid var(--lk-accent);
  padding: 0.5rem 0.9rem;
  background: #fff;
  border-radius: 0 6px 6px 0;
}
/* Inline-bold by default for any <strong> inside the parent note. */
.lk-parent-note strong { font-weight: 700; }
/* Only the LEADING <strong> ("For your grown-up") becomes the eyebrow label. */
.lk-parent-note > strong:first-of-type {
  display: block;
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lk-accent);
  margin-bottom: 0.3rem;
}

.lk-ai4k12 {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--lk-ink-fade);
}
.lk-ai4k12 strong {
  color: var(--lk-accent);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

/* ============================================
   Buttons — big and friendly
   ============================================ */

.lk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.6rem;
  min-height: 56px;
  border: 2px solid var(--lk-accent);
  background: var(--lk-accent);
  color: #fff;
  border-radius: 12px;
  font-family: var(--lk-body);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s, box-shadow 0.15s, background 0.15s;
}
.lk-btn:hover {
  text-decoration: none;
  background: #fff;
  color: var(--lk-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -10px var(--lk-accent);
}
.lk-btn:active { transform: translateY(0); }

.lk-btn-secondary {
  background: #fff;
  color: var(--lk-ink);
  border-color: var(--lk-paper-rule);
}
.lk-btn-secondary:hover {
  border-color: var(--lk-accent);
  color: var(--lk-accent);
  background: #fff;
}

.lk-btn-big {
  font-size: 1.15rem;
  padding: 1.1rem 2rem;
  min-height: 64px;
  font-family: var(--lk-display);
  font-weight: 500;
  letter-spacing: -0.01em;
}

/* Pulses to draw attention to the next-action button. JS toggles data-next. */
.lk-btn[data-next] {
  animation: btn-next-pulse 1.8s ease-in-out infinite;
}
@keyframes btn-next-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 var(--lk-accent-soft), 0 4px 12px -6px var(--lk-accent);
    transform: translateY(0);
  }
  50% {
    box-shadow: 0 0 0 8px transparent, 0 8px 18px -8px var(--lk-accent);
    transform: translateY(-1px);
  }
}
.lk-btn[data-next]:hover { animation: none; }

/* "X of 3 tried" mini progress label */
.lk-progress-hint {
  font-family: var(--lk-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  text-align: center;
  margin: 0.5rem 0 0.4rem;
  font-weight: 600;
}
.lk-progress-hint strong {
  color: var(--lk-accent);
  font-weight: 700;
}

/* ============================================
   Exhibit 1 — Word bubble picker
   ============================================ */

.lk-sentence {
  font-family: var(--lk-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 4.5vw, 2.1rem);
  line-height: 1.45;
  color: var(--lk-ink);
  text-align: center;
  padding: 1.5rem 1rem;
  min-height: 4rem;
  background: var(--lk-paper);
  border-radius: 12px;
  margin-bottom: 1.3rem;
  position: relative;
}

.lk-sentence .blank {
  display: inline-block;
  min-width: 2rem;
  border-bottom: 3px dashed var(--lk-accent);
  padding: 0 0.4rem;
  color: var(--lk-accent);
  font-style: italic;
}

.lk-sentence .new-word {
  display: inline-block;
  animation: word-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  color: var(--lk-accent);
  font-weight: 600;
}
@keyframes word-pop {
  from { transform: scale(0.5); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.lk-bubble-label {
  text-align: center;
  color: var(--lk-ink-soft);
  font-size: 0.95rem;
  margin-bottom: 0.8rem;
}

.lk-bubbles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: center;
  padding: 0.5rem;
  min-height: 7rem;
  align-items: center;
}

.lk-bubble {
  padding: 0.8rem 1.3rem;
  border-radius: 999px;
  border: 2px solid var(--lk-paper-rule);
  background: #fff;
  font-family: var(--lk-body);
  font-weight: 600;
  color: var(--lk-ink);
  cursor: pointer;
  transition: transform 0.15s, background 0.15s, border-color 0.15s;
  position: relative;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.lk-bubble:hover {
  transform: scale(1.05);
  border-color: var(--lk-accent);
  background: var(--lk-accent-soft);
}
.lk-bubble .pct {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  color: var(--lk-ink-fade);
  font-weight: 500;
}
.lk-bubble[data-size="1"] { font-size: 1.4rem; padding: 1rem 1.6rem; border-width: 3px; }
.lk-bubble[data-size="2"] { font-size: 1.15rem; padding: 0.85rem 1.4rem; }
.lk-bubble[data-size="3"] { font-size: 1rem; padding: 0.75rem 1.2rem; }
.lk-bubble[data-size="4"] { font-size: 0.92rem; padding: 0.65rem 1rem; }

.lk-exhibit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: center;
  margin-top: 1.2rem;
}

.lk-step-count {
  text-align: center;
  font-family: var(--lk-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--lk-ink-fade);
  text-transform: uppercase;
  margin-top: 0.8rem;
}

.lk-insight {
  display: none;
  margin-top: 1.6rem;
  padding: 1.4rem 1.5rem;
  background: var(--lk-accent-soft);
  border: 2px dashed var(--lk-accent);
  border-radius: 12px;
  animation: insight-reveal 0.5s ease;
}
.lk-insight.visible { display: block; }
@keyframes insight-reveal {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}
.lk-insight-eyebrow {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lk-accent);
  margin-bottom: 0.5rem;
  font-weight: 700;
}
.lk-insight-text {
  font-family: var(--lk-display);
  font-size: 1.25rem;
  line-height: 1.35;
  color: var(--lk-ink);
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.lk-insight p {
  font-size: 0.95rem;
  color: var(--lk-ink-soft);
  line-height: 1.55;
}

/* ============================================
   Exhibit 2 — Two brains
   ============================================ */

.lk-brains {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
  align-items: stretch;
}

@media (max-width: 560px) {
  .lk-brains { grid-template-columns: 1fr; }
  .lk-brains-vs { display: none; }
}

.lk-brain {
  background: var(--lk-paper);
  border: 2px solid var(--lk-paper-rule);
  border-radius: 14px;
  padding: 1.3rem 1.3rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  min-height: 220px;
}
.lk-brain-robot { border-color: #4a7ba8; }
.lk-brain-human { border-color: var(--lk-r3); }

.lk-brain-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto;
  color: inherit;
}
.lk-brain-robot .lk-brain-icon { color: #4a7ba8; }
.lk-brain-human .lk-brain-icon { color: var(--lk-r3); }

.lk-brain-label {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  font-weight: 600;
}

.lk-brain-answer {
  font-family: var(--lk-display);
  font-size: 1.15rem;
  line-height: 1.35;
  color: var(--lk-ink);
  font-weight: 500;
  min-height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  font-style: italic;
}

.lk-brain-meta {
  font-size: 0.78rem;
  color: var(--lk-ink-fade);
  font-style: italic;
}

.lk-brains-vs {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--lk-display);
  font-weight: 400;
  font-size: 1.6rem;
  color: var(--lk-ink-fade);
}

.lk-question {
  background: var(--lk-accent-soft);
  border-left: 4px solid var(--lk-accent);
  padding: 1rem 1.2rem;
  border-radius: 0 10px 10px 0;
  margin: 1rem 0;
}
.lk-question-label {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lk-accent);
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.lk-question-text {
  font-family: var(--lk-display);
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--lk-ink);
  font-weight: 500;
}

.lk-verdict {
  display: none;
  text-align: center;
  padding: 0.9rem 1.2rem;
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 10px;
  margin-top: 0.8rem;
}
.lk-verdict.visible { display: block; animation: insight-reveal 0.4s ease; }
.lk-verdict-badge {
  display: inline-block;
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.lk-verdict-badge[data-verdict="tie"] { background: #e7dfc4; color: #8a6e1a; }
.lk-verdict-badge[data-verdict="human"] { background: rgba(74,138,95,0.16); color: #2d5f3c; }
.lk-verdict-badge[data-verdict="robot"] { background: rgba(74,123,168,0.16); color: #2c5880; }
.lk-verdict p {
  font-size: 0.95rem;
  color: var(--lk-ink-soft);
  line-height: 1.55;
}

/* ============================================
   Room nav (per-room top bar showing all 5 rooms)
   ============================================ */

.lk-roomnav {
  position: sticky;
  top: 65px;
  z-index: 49;
  background: rgba(253, 248, 236, 0.94);
  backdrop-filter: blur(10px) saturate(1.2);
  border-bottom: 1.5px solid var(--lk-paper-rule);
}
.lk-roomnav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  gap: 0.4rem;
  padding: 0.55rem 1.5rem;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.lk-roomnav-inner::-webkit-scrollbar { display: none; }

.lk-roomnav-label {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  font-weight: 700;
  flex-shrink: 0;
  margin-right: 0.3rem;
}

.lk-roomnav-chip {
  flex-shrink: 0;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-family: var(--lk-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--lk-ink-soft);
  border: 1.5px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.15s;
  letter-spacing: 0.02em;
}
.lk-roomnav-chip:hover {
  background: var(--lk-paper-deep);
  text-decoration: none;
  color: var(--lk-ink);
  transform: translateY(-1px);
}
.lk-roomnav-chip[data-current] {
  background: var(--lk-accent);
  color: #fff;
  font-weight: 800;
  pointer-events: none;
}
.lk-roomnav-chip[data-current]:hover {
  background: var(--lk-accent);
  color: #fff;
  transform: none;
}

@media (max-width: 600px) {
  .lk-roomnav-inner { padding: 0.5rem 1rem; gap: 0.3rem; }
  .lk-roomnav-label { display: none; }
  .lk-roomnav-chip { padding: 0.35rem 0.6rem; font-size: 0.74rem; }
}

/* ============================================
   Room board — compact horizontal tiles
   Image left, text right. 2-col desktop, 1-col mobile.
   ============================================ */

.lk-roomboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin: 1.2rem 0 2rem;
}
@media (max-width: 720px) {
  .lk-roomboard { grid-template-columns: 1fr; }
}

.lk-roomboard-card {
  display: grid;
  grid-template-columns: 130px 1fr;
  align-items: stretch;
  background: #fff;
  border: 2.5px solid var(--lk-paper-rule);
  border-radius: 14px;
  text-decoration: none;
  color: var(--lk-ink);
  overflow: hidden;
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
  position: relative;
  min-height: 130px;
}

.lk-roomboard-card[data-room="1"] { border-color: rgba(216, 138, 10, 0.5); }
.lk-roomboard-card[data-room="2"] { border-color: rgba(198, 69, 69, 0.5); }
.lk-roomboard-card[data-room="3"] { border-color: rgba(74, 138, 95, 0.5); }
.lk-roomboard-card[data-room="4"] { border-color: rgba(56, 114, 184, 0.5); }
.lk-roomboard-card[data-room="5"] { border-color: rgba(184, 130, 30, 0.5); }

.lk-roomboard-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -16px rgba(60, 40, 0, 0.28);
  text-decoration: none;
}
.lk-roomboard-card[data-room="1"]:hover { border-color: var(--lk-r1); }
.lk-roomboard-card[data-room="2"]:hover { border-color: var(--lk-r2); }
.lk-roomboard-card[data-room="3"]:hover { border-color: var(--lk-r3); }
.lk-roomboard-card[data-room="4"]:hover { border-color: var(--lk-r4); }
.lk-roomboard-card[data-room="5"]:hover { border-color: var(--lk-r5); }

.lk-roomboard-card[data-disabled] { cursor: default; pointer-events: none; }
.lk-roomboard-card[data-disabled] .lk-roomboard-illus img {
  filter: grayscale(0.5) brightness(0.96);
  opacity: 0.7;
}
.lk-roomboard-card[data-disabled]::after {
  content: 'Coming soon';
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  z-index: 2;
  font-family: var(--lk-mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--lk-ink-soft);
  background: rgba(255, 248, 232, 0.96);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--lk-paper-rule);
}

.lk-roomboard-illus {
  position: relative;
  width: 130px;
  height: 100%;
  background: var(--lk-paper-deep);
  overflow: hidden;
  border-right: 2px solid var(--lk-paper-rule);
}
.lk-roomboard-illus img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.lk-roomboard-num {
  position: absolute;
  top: 0.4rem;
  left: 0.55rem;
  z-index: 2;
  font-family: var(--lk-display);
  font-weight: 600;
  font-size: 1.4rem;
  line-height: 1;
  color: #fff;
  text-shadow: 0 2px 10px rgba(40, 25, 0, 0.6);
  letter-spacing: -0.02em;
}

.lk-roomboard-body {
  padding: 0.9rem 1.1rem 0.95rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}
.lk-roomboard-title {
  font-family: var(--lk-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--lk-ink);
  margin-bottom: 0.25rem;
  line-height: 1.2;
  letter-spacing: -0.005em;
}
.lk-roomboard-card[data-room="1"] .lk-roomboard-title { color: var(--lk-r1); }
.lk-roomboard-card[data-room="2"] .lk-roomboard-title { color: var(--lk-r2); }
.lk-roomboard-card[data-room="3"] .lk-roomboard-title { color: var(--lk-r3); }
.lk-roomboard-card[data-room="4"] .lk-roomboard-title { color: var(--lk-r4); }
.lk-roomboard-card[data-room="5"] .lk-roomboard-title { color: var(--lk-r5); }

.lk-roomboard-desc {
  font-size: 0.84rem;
  color: var(--lk-ink-soft);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 600px) {
  .lk-roomboard-card { grid-template-columns: 110px 1fr; min-height: 110px; }
  .lk-roomboard-illus { width: 110px; }
  .lk-roomboard-num { font-size: 1.2rem; top: 0.35rem; left: 0.45rem; }
  .lk-roomboard-title { font-size: 1rem; }
  .lk-roomboard-desc { font-size: 0.8rem; -webkit-line-clamp: 2; }
}

/* ============================================
   Room 2 — shared "AI answer" panels
   ============================================ */

.lk-answer-card {
  background: var(--lk-paper);
  border: 2px solid var(--lk-paper-rule);
  border-radius: 14px;
  padding: 1.1rem 1.3rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 110px;
}
.lk-answer-card-label {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.lk-answer-card-label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4a7ba8;
}
.lk-answer-card-text {
  font-family: var(--lk-display);
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--lk-ink);
  font-weight: 500;
  font-style: italic;
}
.lk-answer-card-meta {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  color: var(--lk-ink-fade);
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}
.lk-answer-card[data-state="empty"] { opacity: 0.55; }
.lk-answer-card[data-state="empty"] .lk-answer-card-text {
  color: var(--lk-ink-fade);
  font-style: italic;
  font-size: 0.92rem;
}
.lk-answer-card[data-correctness="wrong"] {
  border-color: var(--lk-r2);
  background: rgba(198, 69, 69, 0.05);
}
.lk-answer-card[data-correctness="right"] {
  border-color: var(--lk-r3);
  background: rgba(74, 138, 95, 0.05);
}

/* ============================================
   Exhibit 2.1 — Confident-Liar Slot Machine
   ============================================ */

.lk-slot-question {
  background: var(--lk-accent-soft);
  border-left: 4px solid var(--lk-accent);
  padding: 1rem 1.2rem;
  border-radius: 0 10px 10px 0;
  margin-bottom: 1.3rem;
}
.lk-slot-question-label {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lk-accent);
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.lk-slot-question-text {
  font-family: var(--lk-display);
  font-size: 1.15rem;
  line-height: 1.35;
  color: var(--lk-ink);
  font-weight: 500;
}
.lk-slot-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  margin-bottom: 1rem;
}
@media (max-width: 600px) {
  .lk-slot-row { grid-template-columns: 1fr; }
}
.lk-slot-correct-line {
  font-family: var(--lk-mono);
  font-size: 0.78rem;
  color: var(--lk-ink-fade);
  text-align: center;
  letter-spacing: 0.05em;
  margin-top: 0.6rem;
  display: none;
}
.lk-slot-correct-line.visible { display: block; }
.lk-slot-correct-line strong { color: var(--lk-r3); font-weight: 700; }

/* ============================================
   Exhibit 2.3 — Strawberry test (tokens)
   ============================================ */

.lk-token-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  padding: 1.2rem 0.8rem;
  background: var(--lk-paper);
  border-radius: 12px;
  margin: 1.1rem 0;
  min-height: 4rem;
  align-items: center;
}
.lk-token {
  display: inline-block;
  padding: 0.65rem 1rem;
  background: #fff;
  border: 2px solid var(--lk-r2);
  border-radius: 10px;
  font-family: var(--lk-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--lk-r2);
  letter-spacing: 0.02em;
  animation: token-pop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes token-pop {
  from { transform: translateY(8px) scale(0.85); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}
.lk-token-eyebrow {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  text-align: center;
  margin-bottom: 0.4rem;
  font-weight: 700;
}
.lk-strawberry-word {
  font-family: var(--lk-display);
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 500;
  text-align: center;
  color: var(--lk-r2);
  letter-spacing: 0.01em;
  padding: 1rem;
  background: var(--lk-paper);
  border-radius: 12px;
  margin: 1rem 0;
}
.lk-count-input-row {
  display: flex;
  gap: 0.7rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin: 1rem 0;
}
.lk-count-input {
  width: 70px;
  height: 56px;
  text-align: center;
  font-family: var(--lk-display);
  font-size: 1.5rem;
  font-weight: 600;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 12px;
  background: #fff;
  color: var(--lk-ink);
}
.lk-count-input:focus {
  outline: none;
  border-color: var(--lk-accent);
}
.lk-count-feedback {
  font-family: var(--lk-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-align: center;
  margin-top: 0.4rem;
  color: var(--lk-ink-fade);
  min-height: 1.2rem;
}
.lk-count-feedback[data-feedback="right"] { color: var(--lk-r3); font-weight: 700; }
.lk-count-feedback[data-feedback="wrong"] { color: var(--lk-r2); font-weight: 700; }

/* ============================================
   Exhibit 2.4 — Yes Mirror
   ============================================ */

.lk-claims {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
}
.lk-claim-btn {
  text-align: left;
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 12px;
  padding: 0.9rem 1.1rem;
  font-family: var(--lk-display);
  font-size: 1rem;
  font-weight: 500;
  font-style: italic;
  color: var(--lk-ink);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  line-height: 1.4;
}
.lk-claim-btn:hover {
  border-color: var(--lk-accent);
  background: var(--lk-accent-soft);
}
.lk-claim-btn[data-selected="true"] {
  border-color: var(--lk-accent);
  background: var(--lk-accent-soft);
}

/* ============================================
   Room 3 — Bad vs Good Prompt (side-by-side)
   ============================================ */

.lk-prompt-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin: 1rem 0;
}
@media (max-width: 600px) {
  .lk-prompt-pair { grid-template-columns: 1fr; }
}
.lk-prompt-col {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.lk-prompt-label {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  text-align: center;
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
}
.lk-prompt-label[data-tone="bad"] {
  background: rgba(198, 69, 69, 0.12);
  color: var(--lk-r2);
}
.lk-prompt-label[data-tone="good"] {
  background: rgba(74, 138, 95, 0.14);
  color: var(--lk-r3);
}
.lk-prompt-bubble {
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  font-family: var(--lk-display);
  font-size: 0.95rem;
  font-style: italic;
  line-height: 1.45;
  color: var(--lk-ink);
}
.lk-prompt-col[data-tone="bad"] .lk-prompt-bubble { border-color: rgba(198, 69, 69, 0.4); }
.lk-prompt-col[data-tone="good"] .lk-prompt-bubble { border-color: rgba(74, 138, 95, 0.45); }

/* ============================================
   Room 4 — Spot the AI Tells card grid
   ============================================ */

.lk-tells-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
  margin: 1.1rem 0;
}
.lk-tell-card {
  background: var(--lk-paper);
  border: 2px solid var(--lk-paper-rule);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
  text-align: left;
  font-family: inherit;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.lk-tell-card:hover {
  border-color: var(--lk-accent);
  background: #fff;
  transform: translateY(-2px);
}
.lk-tell-card-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 8px;
  border: 1.5px solid var(--lk-paper-rule);
  background: var(--lk-paper);
  margin-bottom: 0.5rem;
  display: block;
}
.lk-tell-num {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lk-accent);
  font-weight: 700;
}
.lk-tell-name {
  font-family: var(--lk-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--lk-ink);
  line-height: 1.25;
}
.lk-tell-hint {
  font-family: var(--lk-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  margin-top: 0.15rem;
}
.lk-tell-card:hover .lk-tell-hint { color: var(--lk-accent); }

/* ============================================
   Modal / Lightbox — used by Spot-the-Tells
   ============================================ */

.lk-modal {
  position: fixed;
  inset: 0;
  background: rgba(20, 15, 5, 0.72);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  animation: lk-modal-fade 0.18s ease;
}
.lk-modal.visible { display: flex; }
@keyframes lk-modal-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lk-modal-card {
  background: #fff;
  border-radius: 16px;
  max-width: 560px;
  width: 100%;
  max-height: 92vh;
  overflow-y: auto;
  position: relative;
  display: flex;
  flex-direction: column;
  animation: lk-modal-pop 0.22s cubic-bezier(0.34, 1.4, 0.64, 1);
}
@keyframes lk-modal-pop {
  from { transform: translateY(8px) scale(0.98); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}
.lk-modal-close {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  border: 2px solid var(--lk-paper-rule);
  cursor: pointer;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--lk-ink);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  padding: 0 0 2px;
}
.lk-modal-close:hover {
  background: #fff;
  border-color: var(--lk-accent);
  color: var(--lk-accent);
}
.lk-modal-image-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--lk-paper);
  border-radius: 16px 16px 0 0;
  overflow: hidden;
}
.lk-modal-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.lk-modal-hotspot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.lk-modal-hotspot.visible { opacity: 1; }
.lk-modal-hotspot circle {
  fill: none;
  stroke: #ff6b35;
  stroke-width: 0.8;
  filter: drop-shadow(0 0 1.5px rgba(0,0,0,0.55));
  animation: lk-hotspot-pulse 1.6s ease-in-out infinite;
}
@keyframes lk-hotspot-pulse {
  0%, 100% { stroke-width: 0.8; opacity: 1; }
  50% { stroke-width: 1.4; opacity: 0.65; }
}
.lk-modal-show-btn {
  display: block;
  margin: 0.9rem auto 0.2rem;
  padding: 0.6rem 1.2rem;
  background: var(--lk-accent);
  border: none;
  color: #fff;
  border-radius: 999px;
  font-family: var(--lk-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.lk-modal-show-btn:hover { background: var(--lk-ink); }
.lk-modal-show-btn[data-revealed] { background: var(--lk-paper-deep); color: var(--lk-ink); border: 1.5px solid var(--lk-paper-rule); }
.lk-modal-body {
  padding: 1.4rem 1.5rem 0.5rem;
}
.lk-modal-eyebrow {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lk-accent);
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.lk-modal-title {
  font-family: var(--lk-display);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--lk-ink);
  line-height: 1.2;
  margin-bottom: 0.7rem;
  letter-spacing: -0.01em;
}
.lk-modal-detail {
  font-size: 0.95rem;
  color: var(--lk-ink-soft);
  line-height: 1.55;
}
.lk-modal-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.6rem;
  padding: 0.9rem 1.5rem 1.4rem;
  align-items: center;
}
.lk-modal-nav-btn {
  padding: 0.7rem 0.5rem;
  background: var(--lk-paper-deep);
  border: 2px solid var(--lk-paper-rule);
  border-radius: 10px;
  font-family: var(--lk-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--lk-ink);
  transition: border-color 0.15s, color 0.15s;
}
.lk-modal-nav-btn:hover:not(:disabled) {
  border-color: var(--lk-accent);
  color: var(--lk-accent);
}
.lk-modal-nav-btn:disabled { opacity: 0.35; cursor: default; }
.lk-modal-counter {
  font-family: var(--lk-mono);
  font-size: 0.74rem;
  color: var(--lk-ink-fade);
  letter-spacing: 0.12em;
  text-align: center;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .lk-modal { padding: 0; align-items: stretch; }
  .lk-modal-card { max-height: 100vh; border-radius: 0; }
  .lk-modal-image { border-radius: 0; }
  .lk-modal-title { font-size: 1.2rem; }
  .lk-modal-nav-btn { font-size: 0.82rem; padding: 0.6rem 0.4rem; }
}

/* ============================================
   Room 4 — What AI Can't Know (4-card flip set)
   ============================================ */

.lk-private-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.8rem;
  margin: 1.1rem 0;
}
.lk-private-card {
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
  text-align: left;
  font-family: inherit;
  width: 100%;
}
.lk-private-card:hover {
  transform: translateY(-2px);
  border-color: var(--lk-accent);
}
.lk-private-card[data-flipped] {
  background: var(--lk-accent-soft);
  border-color: var(--lk-accent);
}
.lk-private-q {
  font-family: var(--lk-display);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--lk-ink);
  line-height: 1.3;
  margin-bottom: 0.4rem;
}
.lk-private-a {
  display: none;
  font-size: 0.88rem;
  color: var(--lk-ink-soft);
  line-height: 1.5;
}
.lk-private-card[data-flipped] .lk-private-a { display: block; }
.lk-private-card[data-flipped] .lk-private-prompt { display: none; }
.lk-private-prompt {
  font-family: var(--lk-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
}

/* ============================================
   Room 4 — Cheat-O-Meter
   ============================================ */

.lk-cheat-question {
  background: var(--lk-paper);
  border-left: 4px solid var(--lk-accent);
  padding: 1rem 1.2rem;
  border-radius: 0 10px 10px 0;
  margin-bottom: 1.1rem;
  font-family: var(--lk-display);
  font-size: 1.1rem;
  font-style: italic;
  line-height: 1.4;
  color: var(--lk-ink);
}
.lk-cheat-zones {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.7rem;
  margin-bottom: 1rem;
}
@media (max-width: 540px) {
  .lk-cheat-zones { grid-template-columns: 1fr; }
}
.lk-cheat-zone {
  padding: 0.95rem 0.6rem;
  border-radius: 12px;
  border: 2.5px solid;
  background: #fff;
  font-family: var(--lk-display);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}
.lk-cheat-zone:hover { transform: translateY(-2px); }
.lk-cheat-zone[data-zone="green"] { border-color: var(--lk-r3); color: #2d5f3c; }
.lk-cheat-zone[data-zone="green"]:hover { background: rgba(74,138,95,0.1); }
.lk-cheat-zone[data-zone="yellow"] { border-color: #b08a1a; color: #806410; }
.lk-cheat-zone[data-zone="yellow"]:hover { background: rgba(184,130,30,0.12); }
.lk-cheat-zone[data-zone="red"] { border-color: var(--lk-r2); color: #8a3030; }
.lk-cheat-zone[data-zone="red"]:hover { background: rgba(198,69,69,0.1); }
.lk-cheat-emoji {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-block;
}
.lk-cheat-zone[data-zone="green"] .lk-cheat-emoji { background: var(--lk-r3); }
.lk-cheat-zone[data-zone="yellow"] .lk-cheat-emoji { background: #d8a322; }
.lk-cheat-zone[data-zone="red"] .lk-cheat-emoji { background: var(--lk-r2); }
.lk-cheat-feedback {
  display: none;
  background: var(--lk-paper-deep);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  margin-top: 0.4rem;
  margin-bottom: 0.8rem;
}
.lk-cheat-feedback.visible { display: block; animation: insight-reveal 0.3s ease; }
.lk-cheat-feedback-badge {
  display: inline-block;
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 0.25rem 0.55rem;
  border-radius: 5px;
  margin-bottom: 0.4rem;
}
.lk-cheat-feedback-badge[data-zone="green"] { background: rgba(74,138,95,0.16); color: #2d5f3c; }
.lk-cheat-feedback-badge[data-zone="yellow"] { background: rgba(184,130,30,0.18); color: #806410; }
.lk-cheat-feedback-badge[data-zone="red"] { background: rgba(198,69,69,0.16); color: #8a3030; }
.lk-cheat-feedback p {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--lk-ink-soft);
}
.lk-cheat-progress {
  text-align: center;
  font-family: var(--lk-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--lk-ink-fade);
  text-transform: uppercase;
  margin: 0.6rem 0 1rem;
}

/* ============================================
   Resource block — used in the Robot Pet insight
   for "if you need someone to talk to" links
   ============================================ */

.lk-resources {
  margin-top: 1rem;
  padding: 0.95rem 1.1rem;
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 12px;
}
.lk-resources-eyebrow {
  font-family: var(--lk-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--lk-accent);
  margin-bottom: 0.4rem;
}
.lk-resources-title {
  font-family: var(--lk-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--lk-ink);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}
.lk-resources ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.4rem;
}
.lk-resources li {
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--lk-ink-soft);
  padding-left: 1.1rem;
  position: relative;
}
.lk-resources li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--lk-accent);
  font-weight: 700;
}
.lk-resources strong { color: var(--lk-ink); font-weight: 700; }

/* ============================================
   Room 4 — Robot Pet (parasocial reveal)
   ============================================ */

.lk-pet-stage {
  background: var(--lk-paper);
  border: 2px solid var(--lk-paper-rule);
  border-radius: 14px;
  padding: 1.4rem 1.2rem;
  text-align: center;
  margin-bottom: 1rem;
}
.lk-pet-bubble {
  background: #fff;
  border: 2px solid var(--lk-accent);
  border-radius: 14px;
  padding: 0.9rem 1.1rem;
  font-family: var(--lk-display);
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.4;
  color: var(--lk-ink);
  max-width: 320px;
  margin: 0 auto 0.7rem;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lk-pet-mood {
  font-family: var(--lk-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  font-weight: 700;
}
.lk-pet-rules {
  display: none;
  background: rgba(56, 114, 184, 0.06);
  border: 2px dashed var(--lk-accent);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  margin-top: 0.8rem;
}
.lk-pet-rules.visible { display: block; animation: insight-reveal 0.4s ease; }
.lk-pet-rules h4 {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lk-accent);
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.lk-pet-rules ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}
.lk-pet-rules li {
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--lk-ink-soft);
  padding-left: 1.1rem;
  position: relative;
}
.lk-pet-rules li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--lk-accent);
  font-weight: 700;
}

/* ============================================
   Room 5 — Super-Questions card (printable)
   ============================================ */

.lk-superq-card {
  background: linear-gradient(135deg, #fff 0%, var(--lk-paper) 100%);
  border: 3px dashed var(--lk-accent);
  border-radius: 16px;
  padding: 2rem 1.6rem;
  text-align: center;
  margin: 1.2rem 0;
}
.lk-superq-eyebrow {
  font-family: var(--lk-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lk-accent);
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.lk-superq-title {
  font-family: var(--lk-display);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--lk-ink);
  margin-bottom: 1.4rem;
  letter-spacing: -0.01em;
}
.lk-superq-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  text-align: left;
  max-width: 420px;
  margin: 0 auto;
}
.lk-superq-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  align-items: start;
  padding: 0.6rem 0;
  border-bottom: 1.5px dotted var(--lk-paper-rule);
}
.lk-superq-item:last-child { border-bottom: none; }
.lk-superq-num {
  font-family: var(--lk-display);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--lk-accent);
  line-height: 1;
}
.lk-superq-q {
  font-family: var(--lk-display);
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.35;
  color: var(--lk-ink);
}
.lk-superq-q strong {
  display: block;
  font-style: normal;
  font-size: 0.78rem;
  font-family: var(--lk-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--lk-ink-fade);
  font-weight: 600;
  margin-top: 0.2rem;
}

/* Print-the-card mode: when JS adds .lk-printing-superq to <body>,
   hide everything except the super-questions card. */
@media print {
  body.lk-printing-superq * { visibility: hidden; }
  body.lk-printing-superq .lk-superq-card,
  body.lk-printing-superq .lk-superq-card * { visibility: visible; }
  body.lk-printing-superq .lk-superq-card {
    position: absolute;
    top: 1cm;
    left: 1cm;
    right: 1cm;
    margin: 0;
    border: 3px solid #1a1a1a;
    box-shadow: none;
    background: #fff;
    page-break-inside: avoid;
  }
  body.lk-printing-superq { background: #fff; }
}

/* ============================================
   Room 5 — Try-with-grown-up activities
   ============================================ */

.lk-activity {
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 14px;
  padding: 1.1rem 1.3rem;
  margin-bottom: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.lk-activity-eyebrow {
  font-family: var(--lk-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lk-accent);
  font-weight: 700;
}
.lk-activity-title {
  font-family: var(--lk-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--lk-ink);
  line-height: 1.3;
}
.lk-activity-body {
  font-size: 0.94rem;
  color: var(--lk-ink-soft);
  line-height: 1.55;
}

/* ============================================
   Parents page
   ============================================ */

.lk-parents-card {
  background: #fff;
  border: 2px solid var(--lk-paper-rule);
  border-radius: 14px;
  padding: 1.5rem 1.6rem;
  margin-bottom: 1.2rem;
}
.lk-parents-card h3 {
  font-family: var(--lk-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--lk-ink);
  margin-bottom: 0.5rem;
}
.lk-parents-card p {
  font-size: 1rem;
  color: var(--lk-ink-soft);
  line-height: 1.6;
}

/* ============================================
   Footer
   ============================================ */

.lk-footer {
  border-top: 2px solid var(--lk-paper-rule);
  padding: 2rem 1.5rem;
  margin-top: 4rem;
  text-align: center;
  color: var(--lk-ink-fade);
  font-size: 0.88rem;
}
.lk-footer a { color: var(--lk-ink-soft); font-weight: 500; }
.lk-footer a:hover { color: var(--lk-ink); }

/* ============================================
   Mobile polish
   ============================================ */

@media (max-width: 600px) {
  .lk-page { font-size: 17px; }
  .lk-wrap, .lk-wrap-wide { padding: 1.8rem 1.1rem 3rem; }
  .lk-hero { padding: 2.2rem 0 1.5rem; }
  .lk-hero h1 { font-size: 1.9rem; }
  .lk-hero .lede { font-size: 1.05rem; }

  .lk-nav-inner { padding: 0.7rem 1rem; gap: 0.7rem; flex-wrap: wrap; }
  .lk-brand { font-size: 1rem; }
  .lk-brand-sub { display: none; }
  .lk-brand-mark { width: 32px; height: 32px; }
  .lk-nav-links { gap: 0.9rem; font-size: 0.85rem; }

  .lk-exhibit-head { padding: 1.2rem 1.3rem 0.9rem; }
  .lk-exhibit-body { padding: 1.3rem 1.3rem 1rem; }
  .lk-exhibit-footer { padding: 1rem 1.3rem 1.3rem; }
  .lk-exhibit-title { font-size: 1.35rem; }

  .lk-sentence { font-size: 1.3rem; padding: 1.2rem 0.8rem; }
  .lk-bubble { padding: 0.7rem 1.1rem; font-size: 0.95rem; }
  .lk-bubble[data-size="1"] { font-size: 1.15rem; padding: 0.85rem 1.35rem; }

  .lk-btn { min-height: 52px; padding: 0.8rem 1.3rem; font-size: 0.95rem; }
  .lk-btn-big { font-size: 1.05rem; padding: 0.95rem 1.6rem; min-height: 56px; }
}

/* =========================
   Strawberry walk-through (kids exhibit 03)
   ========================= */
.lk-straw-walk {
  margin: 0.9rem 0 0.4rem;
  padding: 0.9rem 1rem 0.7rem;
  background: var(--lk-paper-deep, #fff8e7);
  border-radius: 10px;
  border: 1px dashed var(--lk-ink-faintest, #e2cda5);
}
.lk-straw-walk-step {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-size: 1rem;
  line-height: 1.55;
  margin-bottom: 0.45rem;
}
.lk-straw-walk-tag {
  display: inline-block;
  font-family: var(--lk-display, Georgia, serif);
  font-weight: 700;
  font-size: 1.1rem;
  background: var(--lk-accent, #c25e00);
  color: white;
  padding: 0.18rem 0.55rem;
  border-radius: 4px;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}
.lk-straw-walk-letters {
  display: inline-block;
  font-family: var(--lk-mono, ui-monospace, "SF Mono", Menlo, monospace);
  font-size: 0.85rem;
  color: var(--lk-ink-soft, #6b5d3f);
  margin-left: 0.4rem;
}
.lk-straw-walk-add {
  margin-top: 0.55rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--lk-ink-faintest, #e2cda5);
  font-size: 1.05rem;
  text-align: center;
  color: var(--lk-ink, #2a1f06);
}

/* Spoiler reveal (tap-to-see) */
.lk-straw-spoiler {
  position: relative;
  display: inline-block;
  cursor: pointer;
  user-select: none;
  vertical-align: baseline;
  margin-left: 0.3rem;
}
.lk-straw-spoiler-cover {
  display: inline-block;
  background: var(--lk-accent, #c25e00);
  color: white;
  padding: 0.12rem 0.5rem;
  border-radius: 4px;
  font-size: 0.82rem;
  font-family: var(--lk-mono, ui-monospace, "SF Mono", Menlo, monospace);
  letter-spacing: 0.04em;
}
.lk-straw-spoiler-ans {
  display: none;
  background: var(--lk-paper-deep, #fff8e7);
  border: 1px solid var(--lk-accent, #c25e00);
  color: var(--lk-ink, #2a1f06);
  padding: 0.12rem 0.5rem;
  border-radius: 4px;
  font-size: 0.92rem;
  font-weight: 600;
}
.lk-straw-spoiler.revealed .lk-straw-spoiler-cover { display: none; }
.lk-straw-spoiler.revealed .lk-straw-spoiler-ans { display: inline-block; }
.lk-straw-spoiler:hover .lk-straw-spoiler-cover {
  background: var(--lk-accent-soft, #d97706);
}
.lk-straw-spoiler:focus { outline: 2px solid var(--lk-accent, #c25e00); outline-offset: 2px; border-radius: 4px; }