:root {
  --bg: #0b1020;
  --bg-soft: #11182b;
  --panel: #151e34;
  --panel-light: #1c2944;
  --line: #2a3957;
  --text: #f4f7fb;
  --muted: #9aa9c4;
  --coral: #ff7f6e;
  --coral-soft: #ffb0a5;
  --mint: #6ee7c8;
  --yellow: #ffd166;
  --accent: hsl(36 80% 52%);
  --danger: #ff8d8d;
  --shadow: 0 22px 55px rgba(0, 0, 0, .24);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: radial-gradient(circle at 78% 0%, #1c2945 0, var(--bg) 38rem), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: inherit; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }

.skip-link {
  position: absolute; left: 1rem; top: -5rem; z-index: 20;
  padding: .7rem 1rem; border-radius: .7rem; background: var(--yellow); color: #16120a; font-weight: 800;
}
.skip-link:focus { top: 1rem; }

.app-shell { display: grid; grid-template-columns: 290px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; padding: 1.5rem 1.1rem;
  background: rgba(11, 16, 32, .86); border-right: 1px solid var(--line); backdrop-filter: blur(16px); z-index: 5;
}
.brand { display: flex; gap: .7rem; align-items: center; text-decoration: none; margin: .2rem .5rem 2rem; }
.brand-mark { display: grid; place-items: center; width: 2.7rem; height: 2.7rem; border-radius: .85rem; background: var(--coral); color: #291416; font-size: 1.45rem; box-shadow: 0 8px 24px rgba(255,127,110,.22); }
.brand strong { display: block; font-size: 1rem; letter-spacing: -.02em; }
.brand small { display: block; color: var(--muted); font-size: .7rem; }
.sidebar-label { margin: 0 .65rem .65rem; color: var(--muted); font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.progress-summary { padding: .85rem; margin-bottom: 1.2rem; border: 1px solid var(--line); border-radius: 1rem; background: rgba(21,30,52,.72); }
.progress-summary-row { display:flex; justify-content:space-between; gap: .5rem; font-size: .78rem; color: var(--muted); }
.progress-summary strong { color: var(--text); }
.progress-track { height: .38rem; margin-top: .7rem; overflow: hidden; border-radius: 99px; background: #263552; }
.progress-fill { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--coral), var(--yellow)); transition: width .35s ease; }
.nav-list { display: grid; gap: .3rem; }
.nav-link { display: grid; grid-template-columns: 1.9rem 1fr auto; align-items: center; gap: .55rem; min-height: 3.3rem; padding: .55rem .65rem; border: 1px solid transparent; border-radius: .8rem; text-decoration: none; color: var(--muted); transition: .2s ease; }
.nav-link:hover { color: var(--text); background: rgba(28,41,68,.7); }
.nav-link[aria-current="page"] { color: var(--text); border-color: #445b83; background: var(--panel-light); }
.nav-number { display:grid; place-items:center; width: 1.8rem; height: 1.8rem; border: 1px solid var(--line); border-radius: .55rem; font-size: .75rem; font-weight: 800; }
.nav-link.completed .nav-number { color: #071d18; border-color: var(--mint); background: var(--mint); }
.nav-title { display: block; font-size: .8rem; font-weight: 700; line-height: 1.25; }
.nav-meta { display:block; margin-top: .13rem; font-size: .67rem; color: var(--muted); }
.nav-state { color: var(--muted); font-size: .9rem; }
.nav-link.completed .nav-state { color: var(--mint); }
.sidebar-footer { position: absolute; left: 1.1rem; right: 1.1rem; bottom: 1.25rem; padding: .75rem .7rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .7rem; }

main { min-width: 0; padding: 0 3.5rem 5rem; }
.topbar { display: flex; justify-content: space-between; align-items: center; max-width: 1120px; margin: 0 auto; padding: 1.5rem 0 1rem; color: var(--muted); font-size: .78rem; }
.eyebrow { display: inline-flex; align-items: center; gap: .45rem; color: var(--coral-soft); font-size: .72rem; font-weight: 850; letter-spacing: .11em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: .45rem; height: .45rem; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 .25rem rgba(255,127,110,.15); }
.content { max-width: 1120px; margin: 0 auto; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 820px; margin-bottom: 1.2rem; font-size: clamp(2.6rem, 6vw, 5.4rem); letter-spacing: -.07em; line-height: .98; }
h2 { margin-bottom: .8rem; font-size: clamp(1.55rem, 3vw, 2.3rem); letter-spacing: -.045em; line-height: 1.1; }
h3 { margin-bottom: .45rem; font-size: 1.1rem; letter-spacing: -.02em; }
.lead { max-width: 670px; color: var(--muted); font-size: 1.06rem; }
.hero { padding: 4rem 0 3.2rem; }
.hero-grid { display:grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr); gap: 3rem; align-items: end; }
.hero-aside { position: relative; min-height: 225px; padding: 1.4rem; border: 1px solid #3c4e74; border-radius: 1.5rem; background: linear-gradient(150deg, #1a2845, #11182b 75%); box-shadow: var(--shadow); overflow: hidden; }
.hero-aside::before, .hero-aside::after { content: ""; position:absolute; border: 1px solid rgba(110,231,200,.25); border-radius: 50%; }
.hero-aside::before { width: 240px; height: 240px; right: -85px; top: -75px; }
.hero-aside::after { width: 155px; height: 155px; right: -42px; top: -32px; }
.hero-aside > * { position: relative; z-index: 1; }
.hero-aside .orb { display:grid; place-items:center; width: 4.1rem; height: 4.1rem; margin-bottom: 1.1rem; border-radius: 1.25rem; background: var(--mint); color: #09231e; font-size: 2rem; }
.hero-aside p { max-width: 250px; color: var(--muted); font-size: .88rem; }
.cta-row { display:flex; flex-wrap:wrap; gap: .8rem; margin-top: 1.8rem; }
.button { display:inline-flex; align-items:center; justify-content:center; gap:.5rem; min-height: 2.75rem; padding: .65rem 1rem; border: 1px solid transparent; border-radius: .7rem; background: var(--coral); color: #2b1317; font-weight: 850; text-decoration:none; transition: .2s ease; }
.button:hover { transform: translateY(-2px); filter: brightness(1.08); }
.button.secondary { border-color: var(--line); background: var(--panel); color: var(--text); }
.button.ghost { min-height: 2.2rem; padding: .4rem .7rem; border-color: var(--line); background: transparent; color: var(--muted); font-size: .78rem; }
.button.mint { background: var(--mint); color: #08251f; }

.section { padding: 3.5rem 0 0; }
.section-heading { display:flex; justify-content:space-between; align-items:end; gap: 1.5rem; margin-bottom: 1.3rem; }
.section-heading p { max-width: 480px; margin-bottom: 0; color: var(--muted); font-size: .9rem; }
.roadmap { position: relative; display:grid; gap: 1rem; }
.roadmap::before { content:""; position:absolute; left: 1.55rem; top: 2.2rem; bottom: 2.2rem; width: 1px; background: linear-gradient(var(--coral), var(--line) 40%, var(--mint)); }
.module-card { position:relative; display:grid; grid-template-columns: 3.2rem minmax(0,1fr) auto; align-items:center; gap: 1rem; padding: 1.2rem 1.35rem 1.2rem .75rem; border: 1px solid var(--line); border-radius: 1.1rem; background: rgba(21,30,52,.82); text-decoration:none; transition:.2s ease; }
.module-card:hover { transform: translateX(4px); border-color: #506a97; background: var(--panel-light); }
.module-index { position:relative; z-index:1; display:grid; place-items:center; width: 2.1rem; height: 2.1rem; margin-left: .5rem; border: 1px solid #60769e; border-radius: .65rem; background: var(--bg-soft); color: var(--coral-soft); font-size: .8rem; font-weight: 900; }
.module-card.completed .module-index { border-color: var(--mint); background: var(--mint); color: #07221c; }
.module-card h3 { margin:0; }
.module-card p { margin: .25rem 0 0; color: var(--muted); font-size: .82rem; }
.module-arrow { color: var(--muted); font-size: 1.3rem; }
.tag-row { display:flex; flex-wrap:wrap; gap: .4rem; margin-top: .65rem; }
.tag { display:inline-flex; padding:.25rem .5rem; border-radius:99px; background:#223351; color:var(--muted); font-size:.68rem; font-weight:700; }

.stats-grid { display:grid; grid-template-columns: repeat(3,1fr); gap: .9rem; margin: 1.5rem 0; }
.stat { padding: 1.1rem; border:1px solid var(--line); border-radius: 1rem; background: rgba(17,24,43,.65); }
.stat strong { display:block; color:var(--coral-soft); font-size: 1.7rem; letter-spacing:-.05em; }
.stat span { color: var(--muted); font-size:.75rem; }

.lesson-header { display:grid; grid-template-columns: minmax(0,1fr) 290px; gap: 2rem; align-items:end; padding: 3.2rem 0 2rem; border-bottom: 1px solid var(--line); }
.lesson-header h1 { font-size: clamp(2.4rem, 5vw, 4.6rem); }
.lesson-kicker { display:flex; justify-content:space-between; align-items:center; gap:1rem; margin-bottom:1rem; color:var(--muted); font-size:.8rem; }
.lesson-progress { padding:1rem; border:1px solid var(--line); border-radius:1rem; background:rgba(21,30,52,.7); }
.lesson-progress strong { display:block; margin-bottom:.55rem; font-size:.78rem; }
.lesson-progress small { display:block; margin-top:.5rem; color:var(--muted); }
.lesson-body { max-width: 850px; padding: 2.3rem 0; }
.lesson-body > section { margin-bottom: 3rem; }
.lesson-body p, .lesson-body li { color: #c6d0e2; }
.lesson-body p { max-width: 740px; }
.lesson-body ul { padding-left:1.2rem; }
.callout { margin: 1.3rem 0; padding: 1.1rem 1.2rem; border-left: 3px solid var(--mint); border-radius: 0 .8rem .8rem 0; background: rgba(110,231,200,.08); }
.callout strong { color:var(--mint); }
.two-col { display:grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.three-col { display:grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1rem; }
.info-card { padding: 1.1rem; border:1px solid var(--line); border-radius:1rem; background:rgba(21,30,52,.72); }
.info-card .icon { display:grid; place-items:center; width:2.25rem; height:2.25rem; margin-bottom:.8rem; border-radius:.7rem; background:#253755; color:var(--mint); font-size:1.2rem; }
.info-card p { margin-bottom:0; font-size:.86rem; }
.before-after { display:grid; grid-template-columns:1fr auto 1fr; gap:.7rem; align-items:center; }
.example-box { padding:1rem; border:1px solid var(--line); border-radius:.9rem; background:#10172a; }
.example-box.bad { border-color:rgba(255,141,141,.4); }
.example-box.good { border-color:rgba(110,231,200,.4); }
.example-box small { display:block; margin-bottom:.5rem; color:var(--muted); font-size:.68rem; font-weight:800; letter-spacing:.1em; text-transform:uppercase; }
.example-box p { margin:0; color:var(--text); font-size:.9rem; }
.arrow-divider { color:var(--coral); font-size:1.5rem; }
.steps { display:grid; gap:.7rem; counter-reset: steps; }
.step { display:grid; grid-template-columns:2.3rem 1fr; gap:.8rem; align-items:start; counter-increment:steps; }
.step::before { content:counter(steps); display:grid; place-items:center; width:2rem; height:2rem; border-radius:.6rem; background:var(--coral); color:#2b1317; font-weight:900; }
.step p { margin:0; }
.exercise { padding:1.4rem; border:1px solid #3c4e74; border-radius:1.2rem; background:linear-gradient(145deg, rgba(28,41,68,.92), rgba(17,24,43,.88)); }
.exercise-title { display:flex; gap:.7rem; align-items:center; margin-bottom:.7rem; }
.exercise-title .icon { margin:0; background:var(--yellow); color:#2b230d; }
.exercise h3 { margin:0; }
.checklist { display:grid; gap:.65rem; margin:1rem 0; }
.check-item { display:flex; align-items:flex-start; gap:.7rem; padding:.7rem; border:1px solid var(--line); border-radius:.75rem; background:rgba(11,16,32,.45); color:#c6d0e2; font-size:.86rem; }
.check-item input { flex:0 0 auto; width:1.1rem; height:1.1rem; margin-top:.2rem; accent-color:var(--mint); }
.check-item:has(input:checked) { border-color:rgba(110,231,200,.45); color:var(--muted); text-decoration:line-through; }

.quiz-form { display:grid; gap:1.1rem; padding:1.35rem; border:1px solid var(--line); border-radius:1.1rem; background:rgba(21,30,52,.72); }
.question { padding-bottom:1rem; border-bottom:1px solid var(--line); transition:.2s ease; }
.question.question-right { padding-left:.85rem; border-left:3px solid var(--mint); }
.question.question-wrong { padding-left:.85rem; border-left:3px solid var(--danger); }
.question:last-of-type { padding-bottom:0; border-bottom:0; }
.question legend { max-width:700px; margin-bottom:.7rem; color:var(--text); font-weight:760; }
.option { display:flex; gap:.65rem; align-items:flex-start; margin:.45rem 0; padding:.6rem .7rem; border:1px solid transparent; border-radius:.65rem; color:#c6d0e2; font-size:.86rem; }
.option:hover { border-color:var(--line); background:rgba(28,41,68,.55); }
.option input { margin-top:.28rem; accent-color:var(--coral); }
.quiz-result { min-height:1.3rem; margin:0; color:var(--muted); font-size:.85rem; }
.quiz-result.success { color:var(--mint); }
.quiz-result.retry { color:var(--yellow); }

textarea, input[type="text"] { width:100%; padding:.8rem .9rem; border:1px solid #405375; border-radius:.7rem; outline:none; background:#0d1425; color:var(--text); resize:vertical; }
textarea { min-height: 120px; }
textarea::placeholder, input::placeholder { color:#687896; }
label.field-label { display:block; margin-bottom:.45rem; color:var(--muted); font-size:.76rem; font-weight:800; }
select { width:100%; padding:.7rem .9rem; border:1px solid #405375; border-radius:.7rem; outline:none; background:#0d1425; color:var(--text); }
.feedback { min-height:1.2rem; margin-top:.55rem; color:var(--mint); font-size:.78rem; }

.tool-card { display:grid; grid-template-columns:3rem 1fr; gap:.8rem; padding:1.1rem; border:1px solid var(--line); border-radius:1rem; background:rgba(21,30,52,.72); }
.tool-logo { display:grid; place-items:center; width:2.6rem; height:2.6rem; border-radius:.8rem; color:#07131b; font-weight:900; }
.tool-logo.chatgpt { background:#7ee9c8; }
.tool-logo.claude { background:#f6b889; }
.tool-logo.gemini { background:#a9b7ff; }
.tool-logo.copilot { background:#e6a9ff; }
.tool-card p { margin:0; font-size:.82rem; }
.warning { padding:1rem; border:1px solid rgba(255,209,102,.45); border-radius:.9rem; background:rgba(255,209,102,.08); }
.warning strong { color:var(--yellow); }
.danger { border-color:rgba(255,141,141,.45); background:rgba(255,141,141,.08); }
.danger strong { color:var(--danger); }

.lesson-footer { display:flex; justify-content:space-between; gap:1rem; align-items:center; padding-top:1.5rem; border-top:1px solid var(--line); }
.complete-button.is-complete { background:var(--mint); color:#09231e; }
.back-link { color:var(--muted); font-size:.8rem; text-decoration:none; }
.back-link:hover { color:var(--text); }
.download-area { display:grid; gap:.75rem; }
.saved-note { color:var(--mint); font-size:.78rem; }

@media (max-width: 900px) {
  .app-shell { display:block; }
  .sidebar { position:relative; height:auto; padding:1rem; border-right:0; border-bottom:1px solid var(--line); }
  .brand { margin:0 0 1rem; }
  .progress-summary { margin-bottom:.8rem; }
  .nav-list { grid-template-columns:repeat(6,minmax(100px,1fr)); overflow-x:auto; padding-bottom:.35rem; }
  .nav-link { grid-template-columns:1.7rem 1fr; min-width:140px; }
  .nav-link .nav-state { display:none; }
  .nav-number { width:1.6rem; height:1.6rem; }
  .sidebar-footer { position:static; margin-top:.6rem; padding-top:.6rem; }
  main { padding:0 1.25rem 4rem; }
  .hero { padding-top:2.5rem; }
  .hero-grid, .lesson-header { grid-template-columns:1fr; gap:1.5rem; }
  .hero-aside { min-height:180px; }
  .lesson-header { padding-top:2rem; }
}
@media (max-width: 620px) {
  h1 { font-size:clamp(2.3rem, 13vw, 3.7rem); }
  .topbar { padding-top:1rem; }
  .topbar .topbar-note { display:none; }
  .stats-grid, .two-col, .three-col, .before-after { grid-template-columns:1fr; }
  .arrow-divider { transform:rotate(90deg); text-align:center; }
  .module-card { grid-template-columns:2.6rem minmax(0,1fr); padding-right:.85rem; }
  .module-arrow { display:none; }
  .section-heading { display:block; }
  .section-heading p { margin-top:.5rem; }
  .lesson-footer { align-items:stretch; flex-direction:column; }
  .lesson-footer .button { width:100%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior:auto !important; transition:none !important; animation:none !important; }
}

/* Interactive lesson moments */
.lesson-picker { display:flex; align-items:center; gap:.55rem; color:var(--muted); font-size:.78rem; font-weight:800; }
.lesson-picker select, .interactive-controls select { min-height:2.35rem; padding:.45rem 2rem .45rem .7rem; border:1px solid #405375; border-radius:.65rem; background:var(--panel); color:var(--text); font:inherit; font-size:.78rem; }
.interactive-card { margin:1.5rem 0 3rem; padding:1.4rem; border:1px solid #3c4e74; border-radius:1.2rem; background:linear-gradient(145deg,rgba(28,41,68,.92),rgba(17,24,43,.88)); box-shadow:0 16px 38px rgba(0,0,0,.14); }
.interactive-card > :last-child { margin-bottom:0; }
.interactive-card .section-heading { margin-bottom:1.1rem; }
.interactive-card .section-heading h2 { margin-bottom:.45rem; }
.interactive-controls { display:flex; flex-wrap:wrap; align-items:end; gap:1rem; margin-bottom:1.2rem; }
.interactive-controls label { display:grid; gap:.4rem; color:var(--muted); font-size:.76rem; font-weight:800; }
.interactive-note { max-width:40rem; margin:0; color:var(--muted); font-size:.86rem; }
.interactive-result { transition:opacity .2s ease,transform .2s ease; }
.interactive-result.is-changing { opacity:.35; transform:translateY(.25rem); }
.abstraction-demo { display:grid; grid-template-columns:minmax(170px,.7fr) minmax(160px,.8fr) minmax(0,1.5fr); gap:1rem; align-items:center; }
.person-orb { display:grid; place-items:center; min-height:9rem; padding:1rem; border:1px solid rgba(255,127,110,.45); border-radius:1rem; background:radial-gradient(circle at 50% 35%,rgba(255,127,110,.25),transparent 60%),#10172a; text-align:center; }
.person-orb .avatar { display:grid; place-items:center; width:3.4rem; height:3.4rem; margin-bottom:.55rem; border-radius:50%; background:var(--coral); color:#2b1317; font-size:1.7rem; }
.person-orb strong, .abstraction-filter strong { display:block; font-size:.86rem; }
.person-orb small, .abstraction-filter small { color:var(--muted); font-size:.72rem; }
.abstraction-filter { position:relative; display:grid; place-items:center; min-height:7rem; padding:1rem; border:1px dashed rgba(255,209,102,.55); border-radius:1rem; background:rgba(255,209,102,.06); text-align:center; }
.abstraction-filter::before, .abstraction-filter::after { content:""; position:absolute; width:.65rem; height:.65rem; border:2px solid var(--yellow); border-radius:50%; animation:orbit 2.4s ease-in-out infinite; }
.abstraction-filter::before { top:1rem; left:1rem; }
.abstraction-filter::after { right:1rem; bottom:1rem; animation-delay:-1.2s; }
.abstraction-filter .filter-icon { margin-bottom:.35rem; color:var(--yellow); font-size:1.4rem; }
@keyframes orbit { 50% { transform:translate(8px,-6px) scale(1.25); opacity:.5; } }
.perspective-result { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:.8rem; }
.perspective-panel { padding:1rem; border:1px solid var(--line); border-radius:.85rem; background:rgba(11,16,32,.48); }
.perspective-panel h3 { margin-bottom:.4rem; font-size:.9rem; }
.perspective-panel ul { margin:0; padding-left:1.15rem; color:#c6d0e2; font-size:.82rem; }
.perspective-panel.focus h3 { color:var(--mint); }
.perspective-panel.hidden h3 { color:var(--coral-soft); }
.example-tabs { display:flex; flex-wrap:wrap; gap:.5rem; }
.example-tab { padding:.5rem .9rem; border:1px solid var(--line); border-radius:99px; background:var(--panel); color:var(--muted); font-size:.78rem; font-weight:800; transition:.2s ease; }
.example-tab:hover { color:var(--text); border-color:#506a97; }
.example-tab[aria-pressed="true"] { border-color:var(--coral); background:var(--coral); color:#2b1317; }
.compare-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:1rem; margin-top:1rem; }
.compare-panel { padding:1rem; border:1px solid var(--line); border-radius:.9rem; background:#10172a; }
.compare-panel.weak { border-color:rgba(255,141,141,.4); }
.compare-panel.strong { border-color:rgba(110,231,200,.4); }
.compare-panel small { display:block; margin-bottom:.6rem; color:var(--muted); font-size:.68rem; font-weight:800; letter-spacing:.1em; text-transform:uppercase; }
.compare-panel p { margin:0 0 .8rem; color:var(--text); font-size:.9rem; }
.compare-tags { display:flex; flex-wrap:wrap; gap:.35rem; }
.compare-tag { padding:.25rem .55rem; border-radius:99px; background:#223351; color:var(--muted); font-size:.68rem; font-weight:700; }
.compare-panel.strong .compare-tag { background:rgba(110,231,200,.15); color:var(--mint); }
.comparison-result { display:grid; grid-template-columns:auto 1fr; gap:.85rem; align-items:start; margin-top:1rem; padding:1rem; border:1px solid rgba(110,231,200,.35); border-radius:.85rem; background:rgba(110,231,200,.06); }
.recommendation-badge { display:grid; place-items:center; min-width:3.5rem; min-height:3.5rem; border-radius:.9rem; background:var(--mint); color:#08251f; font-size:.78rem; font-weight:900; }
.comparison-result h3 { margin-bottom:.25rem; }
.comparison-result p { margin:0; font-size:.84rem; }
.tool-card.is-recommended { border-color:var(--mint); box-shadow:0 0 0 2px rgba(110,231,200,.12); transform:translateY(-2px); }
.hallucination-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:.8rem; }
.hallucination-card { display:flex; flex-direction:column; gap:.8rem; padding:1rem; border:1px solid var(--line); border-radius:.9rem; background:#10172a; transition:.2s ease; }
.hallucination-card p { flex:1; margin:0; color:var(--text); font-size:.83rem; }
.hallucination-card.is-correct { border-color:var(--mint); background:rgba(110,231,200,.1); }
.hallucination-card.is-wrong { border-color:var(--danger); background:rgba(255,141,141,.1); }
.hallucination-card button { width:100%; min-height:2.35rem; padding:.45rem; border:1px solid var(--line); border-radius:.6rem; background:transparent; color:var(--muted); font-size:.76rem; font-weight:800; }
.hallucination-card.is-correct button { border-color:var(--mint); color:var(--mint); }
.hallucination-card.is-wrong button { border-color:var(--danger); color:var(--danger); }
.confidence-control { margin-top:1.2rem; padding:1rem; border:1px solid var(--line); border-radius:.9rem; background:rgba(11,16,32,.42); }
.confidence-control label { display:flex; justify-content:space-between; gap:1rem; color:var(--muted); font-size:.8rem; font-weight:800; }
.confidence-control input[type=range] { width:100%; margin:1rem 0 .5rem; accent-color:var(--yellow); }
.confidence-readout { margin:0; color:var(--yellow); font-size:.84rem; }
.confidence-control[data-level=low] .confidence-readout { color:var(--mint); }
.confidence-control[data-level=high] .confidence-readout { color:var(--danger); }
.wizard-grid { display:grid; grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr); gap:1rem; }
.wizard-form { display:grid; gap:.9rem; padding:1rem; border:1px solid var(--line); border-radius:.9rem; background:rgba(11,16,32,.42); }
.wizard-field-row { display:grid; gap:.4rem; }
.wizard-preview { min-height:15rem; padding:1.15rem; border:1px solid rgba(110,231,200,.38); border-radius:.9rem; background:#0b191a; }
.wizard-preview small { display:block; margin-bottom:.6rem; color:#719c91; font-size:.68rem; font-weight:800; letter-spacing:.1em; text-transform:uppercase; }
.wizard-preview p { margin:0; color:#d4f8ee; font-size:.9rem; white-space:pre-wrap; }
@media (max-width:900px) {
  .abstraction-demo, .wizard-grid { grid-template-columns:1fr; }
  .abstraction-filter { min-height:5rem; }
}
@media (max-width:620px) {
  .lesson-picker span { display:none; }
  .interactive-card { padding:1rem; }
  .perspective-result, .compare-grid, .hallucination-grid { grid-template-columns:1fr; }
}

/* Reference-inspired navigation, stages and reveal motion */
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.site-nav { display:flex; align-items:center; gap:.8rem; max-width:1120px; margin:0 auto; padding:1rem 0 .2rem; }
.site-nav-brand { display:inline-flex; align-items:center; gap:.55rem; margin-right:auto; text-decoration:none; font-size:.82rem; }
.site-nav-brand .brand-mark { width:2rem; height:2rem; border-radius:.6rem; font-size:1rem; }
.site-search { flex:0 1 14rem; }
.site-search input { min-height:2.25rem; padding:.45rem .7rem; font-size:.76rem; }
.lessons-menu { position:relative; z-index:10; }
.lessons-menu summary { display:flex; align-items:center; gap:.35rem; padding:.48rem .7rem; border:1px solid var(--line); border-radius:.65rem; color:var(--text); cursor:pointer; font-size:.78rem; font-weight:800; list-style:none; }
.lessons-menu summary::-webkit-details-marker { display:none; }
.lessons-menu nav { position:absolute; right:0; top:calc(100% + .45rem); display:grid; min-width:12rem; padding:.4rem; border:1px solid var(--line); border-radius:.75rem; background:var(--panel); box-shadow:var(--shadow); }
.lessons-menu nav a { padding:.55rem .65rem; border-radius:.45rem; color:var(--muted); text-decoration:none; font-size:.75rem; }
.lessons-menu nav a:hover, .lessons-menu nav a:focus-visible { background:var(--panel-light); color:var(--text); }
.presentation-link { color:var(--muted); font-size:.74rem; text-decoration:none; white-space:nowrap; }
.presentation-link:hover { color:var(--mint); }
.wrap { width:min(100% - 2rem, 850px); margin-inline:auto; }
.wrap.wide { width:min(100% - 2rem, 1120px); }
.reveal { opacity:0; transform:translateY(1.25rem); transition:opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity:1; transform:none; }
.stage-shell { margin-top:1rem; padding:1rem; border:1px solid rgba(255,209,102,.25); border-radius:1rem; background:rgba(11,16,32,.44); }
.city-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:.5rem; }
.city-tile { min-height:3.2rem; padding:.55rem; border:1px solid #304362; border-radius:.65rem; background:#121d32; color:#71809b; font-size:.72rem; transition:opacity .3s ease, transform .3s ease, color .3s ease, border-color .3s ease, background .3s ease; }
.city-tile:hover, .city-tile:focus-visible { transform:translateY(-2px); border-color:var(--yellow); }
.city-tile.is-lit { border-color:var(--mint); background:rgba(110,231,200,.18); color:var(--mint); box-shadow:0 0 1rem rgba(110,231,200,.12); }
.city-tile.is-dim { opacity:.42; }
.city-grid-caption { margin:.8rem 0 0; color:var(--muted); font-size:.75rem; text-align:center; }
.city-state { font-weight:800; }
.city-state.stays { color:var(--mint); }
.city-state.goes { color:var(--coral-soft); }
@media (max-width:900px) { .site-nav { flex-wrap:wrap; } .site-search { order:3; flex-basis:100%; } }
@media (max-width:620px) { .site-nav-brand strong, .presentation-link { display:none; } .site-nav { gap:.5rem; } .city-grid { grid-template-columns:repeat(2,1fr); } }
@media (prefers-reduced-motion:reduce) { .reveal { opacity:1; transform:none; } }