/* ============================================================
   BMI Physical AI — V2 platform components (extends app.css)
   ============================================================ */

/* ---------- brand lockup (BMI logo + Physical AI dept) ---------- */
.brand-lock { display:flex; align-items:center; gap:13px; }
.bmi-logo { height:40px; width:auto; display:block; border-radius:5px; }
.brand-div { width:1px; height:26px; background:var(--line); display:inline-block; flex:0 0 auto; }
.brand-dept { font-family:var(--font-display); font-weight:600; font-size:18px; letter-spacing:.01em; color:var(--ink); transition:color .2s; white-space:nowrap; display:inline-flex; align-items:center; gap:8px; }
.pai-navmark { width:21px; height:23px; flex:0 0 auto; }
.brand-dept:hover { color:var(--gold,#CFAA5B); }
footer .brand-lock .brand-dept { font-size:16px; }
.theme-btn { font-family:var(--font-mono); font-size:11px; letter-spacing:.04em; color:var(--ink-dim);
  background:transparent; border:1px solid var(--line); border-radius:6px; padding:6px 10px; cursor:pointer;
  transition:border-color .2s, color .2s; white-space:nowrap; }
.theme-btn:hover { border-color:var(--cyan); color:var(--ink); }

/* pillar page heroes sit tight under the sticky nav */
.pillar-hero { padding-top: 64px; }
.pillar-hero .sec-head { max-width: 70ch; }

/* ---------- home: ecosystem grid ---------- */
.eco-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:20px; margin-top:42px; }
.eco-grid.eco-3 { grid-template-columns:repeat(3,1fr); }
.eco-grid.eco-4 { grid-template-columns:repeat(4,1fr); }
@media (max-width:1000px){ .eco-grid.eco-3 { grid-template-columns:1fr; max-width:560px; margin-left:auto; margin-right:auto; } }
@media (max-width:1080px){ .eco-grid.eco-4 { grid-template-columns:repeat(2,1fr); } }
@media (max-width:600px){ .eco-grid.eco-4 { grid-template-columns:1fr; } }
.eco-card { display:flex; flex-direction:column; border:1px solid var(--line-soft); border-radius:16px;
  overflow:hidden; background:var(--panel); transition:border-color .25s, transform .25s, box-shadow .25s; }
.eco-card:hover { border-color:var(--cyan); transform:translateY(-4px); box-shadow:0 18px 50px rgba(0,0,0,.35); }
.eco-media { position:relative; aspect-ratio:16/9; overflow:hidden; }
.eco-media img { width:100%; height:100%; object-fit:cover; transition:transform .6s var(--ease); }
.eco-card:hover .eco-media img { transform:scale(1.05); }
.eco-media::after { content:""; position:absolute; inset:0; background:linear-gradient(180deg,transparent 40%,rgba(10,22,40,.7)); }
.eco-tag { position:absolute; top:12px; left:13px; z-index:2; font-size:10.5px; letter-spacing:.12em;
  color:var(--cyan); border:1px solid rgba(207,170,91,.4); border-radius:5px; padding:3px 8px; background:rgba(10,22,40,.55); }
.eco-body { padding:22px; display:flex; flex-direction:column; gap:8px; flex:1; }
.eco-body h3 { font-size:22px; }
.eco-body p { color:var(--ink-dim); font-size:15px; flex:1; }
.eco-go { color:var(--amber); font-size:12px; letter-spacing:.08em; margin-top:6px; }
.eng-tech { display:inline-block; align-self:flex-start; color:var(--cyan); font-size:11px; letter-spacing:.07em;
  border:1px solid rgba(207,170,91,.35); border-radius:5px; padding:3px 8px; margin-top:2px; background:rgba(207,170,91,.06); }

/* ---------- twin: interactive stage ---------- */
.twin-stage { position:relative; margin-top:42px; border:1px solid var(--line); border-radius:16px;
  overflow:hidden; aspect-ratio:16/9; background:#0B1A30; }
.trace-stage { position:relative; margin-top:34px; border:1px solid var(--line); border-radius:16px;
  overflow:hidden; min-height:320px; background:radial-gradient(120% 120% at 50% 0%, #13294B, #0B1A30); }
.atlas-stage { position:relative; margin-top:34px; border:1px solid var(--line); border-radius:16px;
  overflow:hidden; min-height:680px; background:var(--panel); }
.twin-poster { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; opacity:.7; }
.twin-stage::after { content:""; position:absolute; inset:0; background:radial-gradient(120% 120% at 50% 0%,transparent,rgba(10,22,40,.6)); }
.twin-overlay { position:absolute; inset:0; z-index:2; display:flex; flex-direction:column; align-items:center;
  justify-content:center; gap:16px; text-align:center; }
.twin-badge { color:var(--cyan); border:1px solid rgba(207,170,91,.4); border-radius:5px; padding:4px 10px;
  font-size:10.5px; letter-spacing:.14em; background:rgba(10,22,40,.5); }
.twin-launch { font-size:14px; padding:13px 24px; }
.twin-hint { color:var(--ink-faint); font-size:11px; letter-spacing:.04em; }
.twin-stage.axon-loading .twin-overlay::after { content:"Loading renderer…"; color:var(--cyan); font-family:var(--font-mono); font-size:12px; }
canvas.axon-canvas { position:absolute; inset:0; width:100%; height:100%; display:block; z-index:3; cursor:grab; }
canvas.axon-canvas:active { cursor:grabbing; }
.twin-hud2 { position:absolute; z-index:4; left:14px; bottom:14px; right:14px; display:flex; align-items:center;
  gap:8px; flex-wrap:wrap; pointer-events:none; }
.twin-hud2 .twin-ctl, .twin-hud2 .twin-fps { pointer-events:auto; }
.twin-fps { color:var(--cyan); font-size:11px; letter-spacing:.06em; background:rgba(10,22,40,.6);
  border:1px solid var(--line); border-radius:6px; padding:6px 10px; margin-right:auto; }
.twin-ctl { font-family:var(--font-mono); font-size:11.5px; letter-spacing:.03em; color:var(--ink);
  background:rgba(10,22,40,.65); border:1px solid var(--line); border-radius:6px; padding:7px 12px;
  cursor:pointer; transition:border-color .2s, color .2s; backdrop-filter:blur(6px); }
.twin-ctl:hover { border-color:var(--cyan); color:var(--cyan); }
.twin-stats { position:absolute; z-index:4; top:14px; left:14px; display:flex; gap:8px; flex-wrap:wrap; }
.twin-stat { display:inline-flex; align-items:baseline; gap:5px; font-size:10.5px; letter-spacing:.08em;
  color:var(--ink-dim); background:rgba(10,22,40,.62); border:1px solid var(--line); border-radius:6px;
  padding:5px 9px; backdrop-filter:blur(6px); }
.twin-stat b { font-family:var(--font-display); font-size:13px; color:var(--ink); letter-spacing:0; }
.twin-stat.live b { color:var(--good); }
.twin-stat.warn b { color:var(--amber); }

/* ---------- education: course catalog ---------- */
.course-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:40px; }
.course-card { display:flex; flex-direction:column; border:1px solid var(--line-soft); border-radius:14px;
  overflow:hidden; background:var(--panel); transition:border-color .25s, transform .25s; }
.course-card:hover { border-color:var(--line); transform:translateY(-3px); }
.course-media { position:relative; aspect-ratio:16/9; overflow:hidden; }
.course-media img { width:100%; height:100%; object-fit:cover; }
.course-media::after { content:""; position:absolute; inset:0; background:linear-gradient(180deg,transparent 45%,rgba(10,22,40,.65)); }
.course-code { position:absolute; top:10px; left:11px; z-index:2; font-size:10px; letter-spacing:.1em;
  color:var(--cyan); border:1px solid rgba(207,170,91,.4); border-radius:4px; padding:2px 7px; background:rgba(10,22,40,.55); }
.course-done { position:absolute; top:10px; right:11px; z-index:2; font-size:10px; letter-spacing:.08em;
  color:var(--good); border:1px solid rgba(95,208,138,.5); border-radius:4px; padding:2px 7px; background:rgba(10,22,40,.55); }
.course-body { padding:20px; display:flex; flex-direction:column; gap:10px; flex:1; }
.course-meta { display:flex; gap:8px; font-size:11px; letter-spacing:.06em; color:var(--ink-faint); }
.course-body h3 { font-size:18px; }
.course-body p { color:var(--ink-dim); font-size:14px; flex:1; }
.progress-track { height:5px; border-radius:3px; background:var(--line-soft); overflow:hidden; }
.progress-fill { height:100%; background:linear-gradient(90deg,var(--cyan),var(--amber)); border-radius:3px; transition:width .8s var(--ease); }
.course-cta { align-self:flex-start; font-size:12.5px; padding:9px 16px; }

/* ---------- research: publications ---------- */
.paper-list { margin-top:38px; border:1px solid var(--line-soft); border-radius:14px; overflow:hidden; background:var(--panel); }
.paper-row { display:grid; grid-template-columns:90px 1fr auto; gap:18px; align-items:center;
  padding:18px 22px; border-bottom:1px solid var(--line-soft); transition:background .2s; }
.paper-row:last-child { border-bottom:0; }
.paper-row:hover { background:var(--panel2); }
.paper-date { color:var(--amber); font-size:12px; }
.paper-main { display:flex; flex-direction:column; gap:3px; }
.paper-title { font-family:var(--font-display); font-weight:600; color:var(--ink); font-size:15.5px; }
.paper-authors { color:var(--ink-dim); font-size:13px; }
.paper-venue { color:var(--ink-faint); font-size:11.5px; letter-spacing:.06em; }

/* ---------- intelligence: console ---------- */
.intel-stage { position:relative; margin-top:34px; border:1px solid var(--line); border-radius:16px;
  overflow:hidden; aspect-ratio:21/9; background:#0B1A30; }
.intel-bg { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; opacity:.5; }
.intel-stage::after { content:""; position:absolute; inset:0;
  background:linear-gradient(180deg,rgba(10,22,40,.5),transparent 35%,rgba(10,22,40,.75)); }
.intel-hud { position:absolute; top:14px; left:16px; right:16px; z-index:2; display:flex; justify-content:space-between; }
.hud-tag { color:var(--amber); font-size:10.5px; letter-spacing:.14em; text-shadow:0 1px 6px #000; }
.hud-coord { color:var(--cyan); font-size:10.5px; letter-spacing:.1em; text-shadow:0 1px 6px #000; }
.intel-metrics { position:absolute; left:16px; bottom:16px; z-index:2; display:flex; gap:10px 26px; flex-wrap:wrap; }
.metric { display:flex; flex-direction:column; }
.metric .metric-val { font-family:var(--font-display); font-size:26px; font-weight:600; color:var(--ink); }
.metric .metric-val.cy { color:var(--cyan); } .metric .metric-val.am { color:var(--amber); }
.metric span.mono { font-size:10.5px; letter-spacing:.06em; color:var(--ink-dim); }
.intel-launch { position:absolute; right:16px; bottom:16px; z-index:2; display:flex; flex-direction:column; align-items:flex-end; gap:6px; }
.intel-cols { display:grid; grid-template-columns:1.2fr 1fr; gap:34px; }
.feed { margin-top:22px; border:1px solid var(--line-soft); border-radius:14px; background:var(--panel); overflow:hidden; }
.feed-row { display:grid; grid-template-columns:10px 52px 1fr; gap:12px; align-items:center; padding:14px 18px; border-bottom:1px solid var(--line-soft); }
.feed-row:last-child { border-bottom:0; }
.feed-dot { width:8px; height:8px; border-radius:50%; }
.feed-dot.cyan { background:var(--cyan); box-shadow:0 0 8px var(--cyan); }
.feed-dot.amber { background:var(--amber); box-shadow:0 0 8px var(--amber); }
.feed-time { font-size:11.5px; color:var(--ink-faint); }
.feed-txt { font-size:14px; color:var(--ink-dim); }
.layer-list { margin-top:22px; display:flex; flex-direction:column; gap:14px; }
.layer { display:grid; grid-template-columns:64px 1fr; gap:16px; align-items:center; padding:18px;
  border:1px solid var(--line-soft); border-radius:12px; background:var(--panel); }
.layer-k { font-size:13px; letter-spacing:.1em; color:var(--cyan); font-weight:500; }
.layer:nth-child(3) .layer-k { color:var(--amber); }
.layer h3 { font-size:17px; margin-bottom:5px; } .layer p { font-size:14px; color:var(--ink-dim); }

/* ---------- toast ---------- */
.axon-toast { position:fixed; left:50%; bottom:26px; transform:translateX(-50%) translateY(20px);
  z-index:120; background:var(--panel2); border:1px solid var(--cyan); color:var(--ink);
  font-family:var(--font-mono); font-size:12.5px; padding:11px 18px; border-radius:9px;
  box-shadow:0 10px 30px rgba(0,0,0,.4); opacity:0; pointer-events:none; transition:opacity .25s, transform .25s; }
.axon-toast.show { opacity:1; transform:translateX(-50%) translateY(0); }

/* ---------- responsive ---------- */
@media (max-width:900px){
  .eco-grid { grid-template-columns:1fr; }
  .course-grid { grid-template-columns:repeat(2,1fr); }
  .intel-cols { grid-template-columns:1fr; gap:24px; }
  .intel-stage { aspect-ratio:16/10; }
}
@media (max-width:560px){
  .course-grid { grid-template-columns:1fr; }
  .paper-row { grid-template-columns:1fr; gap:6px; }
  .intel-metrics { gap:8px 18px; }
}

/* ===== EDUCATION / notebook =====
   Pyodide-powered in-browser Python notebook (island "notebook"). */

/* Mount container — dark instrument panel with cyan/amber accents. */
.edu-stage { position:relative; margin-top:34px; min-height:320px;
  border:1px solid var(--line); border-radius:16px; background:var(--panel);
  overflow:hidden; }
/* Loading shimmer hint while Pyodide boots. */
.edu-stage.axon-loading { border-color:rgba(207,170,91,.4);
  box-shadow:0 0 0 1px rgba(207,170,91,.12) inset; }

/* SSR placeholder (poster + launch button), shown until the island mounts. */
.edu-poster { display:flex; flex-direction:column; align-items:center;
  justify-content:center; gap:14px; text-align:center; min-height:320px;
  padding:40px 24px;
  background:radial-gradient(120% 120% at 50% 0%, rgba(207,170,91,.06), transparent 60%); }
.edu-badge { color:var(--cyan); border:1px solid rgba(207,170,91,.4);
  border-radius:5px; padding:4px 10px; font-size:10.5px; letter-spacing:.16em; }
.edu-poster-title { font-size:22px; color:var(--ink); margin:4px 0 0; }
.edu-poster-desc { color:var(--ink-dim); font-size:14px; max-width:52ch; margin:0; }
.edu-launch { font-size:14px; padding:13px 24px; margin-top:4px; }
.edu-hint { color:var(--ink-faint); font-size:11px; letter-spacing:.04em; }

/* Live notebook shell (built by notebook.js after mount). */
.nb-wrap { display:flex; flex-direction:column; gap:18px; padding:24px; }
.nb-head { display:flex; flex-direction:column; gap:8px;
  border-bottom:1px solid var(--line-soft); padding-bottom:16px; }
.nb-eyebrow { color:var(--cyan); font-size:10.5px; letter-spacing:.16em; }
.nb-title { font-size:20px; color:var(--ink); margin:0; }
.nb-intro { color:var(--ink-dim); font-size:14px; max-width:70ch; margin:0; line-height:1.55; }

/* Toolbar (run-all, reset, status). */
.nb-toolbar { display:flex; flex-wrap:wrap; align-items:center; gap:12px; }
.nb-status { color:var(--ink-faint); font-size:11.5px; letter-spacing:.04em;
  margin-left:auto; }
.nb-status-err { color:var(--amber); }

/* Generic small control button (run-all, reset). */
.nb-ctl { font-family:var(--font-mono); font-size:11.5px; letter-spacing:.03em;
  color:var(--ink-dim); background:rgba(10,22,40,.65); border:1px solid var(--line);
  border-radius:6px; padding:8px 14px; cursor:pointer;
  transition:border-color .2s, color .2s; }
.nb-ctl:hover { border-color:var(--cyan); color:var(--cyan); }

/* Run buttons — cyan-accented action. */
.nb-run { font-family:var(--font-mono); font-size:11.5px; letter-spacing:.03em;
  color:var(--cyan); background:rgba(207,170,91,.10);
  border:1px solid rgba(207,170,91,.45); border-radius:6px; padding:7px 14px;
  cursor:pointer; transition:background .2s, border-color .2s, color .2s; }
.nb-run:hover { background:rgba(207,170,91,.20); border-color:var(--cyan); }
.nb-run:disabled { opacity:.55; cursor:default; }
.nb-run-all { color:var(--bg); background:var(--cyan); border-color:var(--cyan);
  font-weight:500; }
.nb-run-all:hover { background:#5ad9ec; }

/* Cell stack. */
.nb-cells { display:flex; flex-direction:column; gap:16px; }
.nb-cell { border:1px solid var(--line-soft); border-radius:12px;
  background:var(--bg2); overflow:hidden; transition:border-color .2s; }
.nb-cell:focus-within { border-color:rgba(207,170,91,.5); }
.nb-cell-bar { display:flex; align-items:center; justify-content:space-between;
  gap:12px; padding:10px 14px; border-bottom:1px solid var(--line-soft);
  background:rgba(10,22,40,.45); }
.nb-cell-label { color:var(--amber); font-size:11px; letter-spacing:.08em; }

/* Editable code area — monospace, dark, cyan caret. */
.nb-code { display:block; width:100%; box-sizing:border-box; resize:vertical;
  min-height:64px; padding:14px 16px; border:0; outline:none;
  font-family:var(--font-mono); font-size:13px; line-height:1.55;
  color:var(--ink); background:#0a1424; caret-color:var(--cyan);
  tab-size:4; white-space:pre; overflow-x:auto; }
.nb-code::selection { background:rgba(207,170,91,.28); }

/* Output area. */
.nb-out { margin:0; padding:14px 16px; border-top:1px solid var(--line-soft);
  font-family:var(--font-mono); font-size:12.5px; line-height:1.5;
  white-space:pre; overflow-x:auto; color:var(--ink-dim);
  background:rgba(10,22,40,.55); }
.nb-out-ok { color:#7fe6c4; border-top-color:rgba(127,230,196,.25); }
.nb-out-pending { color:var(--ink-faint); font-style:italic; }
.nb-err { color:var(--amber); border-top-color:rgba(238,174,74,.35);
  background:rgba(238,174,74,.06); }

@media (max-width:560px){
  .nb-wrap { padding:16px; }
  .nb-code { font-size:12px; }
}

/* ============================================================================
   Education — course catalog links, course pages, 7-phase lesson pages.
   Appended for the Physical AI course integration. Uses brand tokens.
   ============================================================================ */

/* Catalog cards as links */
a.course-link { text-decoration: none; color: inherit; display: block; transition: transform .18s var(--ease), border-color .18s var(--ease); }
a.course-link:hover { transform: translateY(-3px); border-color: var(--gold); }
.course-go { display: inline-block; margin-top: 10px; color: var(--gold); font-size: 12px; letter-spacing: .04em; }

/* Course landing hero */
.course-hero-title { font-family: var(--font-display); font-size: clamp(28px, 5vw, 48px); line-height: 1.05; margin: 6px 0 10px; }
.course-hero-lede { color: var(--ink-dim); max-width: 60ch; font-size: 17px; }
.course-hero-meta { margin: 14px 0 22px; color: var(--ink-faint); }
.course-hero-meta span { margin-right: 8px; }
.course-start { margin-right: 14px; }
.nav-back { color: var(--ink-faint); text-decoration: none; }
.nav-back:hover { color: var(--gold); }

/* Module + lesson list on course page */
.module-block { border-top: 1px solid var(--line); padding: 26px 0; }
.module-head { margin-bottom: 14px; }
.module-num { color: var(--gold); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.module-head h2 { font-size: 22px; margin: 4px 0 4px; }
.module-obj { color: var(--ink-dim); max-width: 64ch; }
.lesson-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.lesson-row { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 14px;
  padding: 12px 16px; border: 1px solid var(--line-soft); border-radius: 10px;
  background: var(--panel); text-decoration: none; color: inherit; transition: border-color .15s var(--ease), background .15s var(--ease); }
.lesson-row:hover { border-color: var(--gold); background: var(--panel2); }
.lesson-level { color: var(--gold); font-size: 12px; }
.lesson-row-title { font-weight: 600; }
.lesson-row-obj { grid-column: 2; color: var(--ink-faint); font-size: 13px; }
.lesson-go { color: var(--ink-faint); }

/* Lesson page */
.lesson-top { padding-top: 30px; }
.crumbs { color: var(--ink-faint); font-size: 12px; margin-bottom: 10px; }
.crumbs a { color: var(--ink-dim); text-decoration: none; }
.crumbs a:hover { color: var(--gold); }
.lesson-title { font-family: var(--font-display); font-size: clamp(24px, 4vw, 38px); line-height: 1.08; margin: 6px 0 8px; }
.lesson-obj { color: var(--ink-dim); max-width: 64ch; font-size: 16px; }

/* Phase blocks (the 7-phase cycle) */
.phase { border-top: 1px solid var(--line); }
.phase-head { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 12px; }
.phase-num { flex: 0 0 auto; width: 34px; height: 34px; display: grid; place-items: center;
  border: 1px solid var(--gold); border-radius: 8px; color: var(--gold); font-size: 13px; }
.phase-label { display: block; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink); }
.phase-sub { color: var(--ink-faint); font-size: 13px; margin: 2px 0 0; }
.phase-body { max-width: 70ch; }
.prose { color: var(--ink-dim); line-height: 1.65; }
.prose h2, .prose h3, .prose h4 { color: var(--ink); margin: 18px 0 8px; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose code { font-family: var(--font-mono); font-size: .92em; background: var(--panel2);
  padding: .12em .4em; border-radius: 4px; color: var(--ink); }
.prose pre { background: var(--panel2); border: 1px solid var(--line-soft); border-radius: 8px;
  padding: 12px 14px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; }
.prose table { border-collapse: collapse; margin: 12px 0; font-size: 14px; }
.prose th, .prose td { border: 1px solid var(--line-soft); padding: 6px 10px; text-align: left; }
.prose strong { color: var(--ink); }

.stage-note { color: var(--ink-faint); font-size: 12.5px; margin-top: 12px; border-left: 2px solid var(--gold); padding-left: 10px; }

/* Feedback / autograder contract */
.pass-line { color: var(--ink-dim); margin-bottom: 10px; }
.pass-tag { color: var(--good, #36d399); border: 1px solid var(--good, #36d399); border-radius: 4px; padding: .1em .5em; font-size: 11px; letter-spacing: .1em; }
.fb-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.fb-list li { font-size: 12.5px; color: var(--ink-faint); border-left: 2px solid var(--line); padding: 4px 0 4px 10px; }
.retrieve-list { color: var(--ink-dim); padding-left: 22px; }
.retrieve-list li { margin: 4px 0; }
.gate { border: 1px solid var(--gold); border-radius: 10px; padding: 12px 16px; background: var(--panel); }

/* Lesson prev/next */
.lesson-nav { border-top: 1px solid var(--line); }
.lesson-nav-in { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.lnav { display: grid; gap: 3px; padding: 14px 18px; border: 1px solid var(--line-soft); border-radius: 10px;
  background: var(--panel); text-decoration: none; color: inherit; min-width: 220px; transition: border-color .15s var(--ease); }
.lnav:hover { border-color: var(--gold); }
.lnav.next { text-align: right; }
.lnav .mono { color: var(--gold); font-size: 12px; }
.lnav-t { color: var(--ink); font-size: 14px; }

@media (max-width: 640px) {
  .lesson-row { grid-template-columns: 40px 1fr; }
  .lesson-go { display: none; }
  .lesson-row-obj { grid-column: 1 / -1; }
}

/* ---------- Intelligence: full-bleed workspace ---------- */
/* The page IS the tool: no marketing chrome, no page scroll — the app owns the viewport. */
body.intel-page { overflow: hidden; }
body.intel-page #progress { display: none; }
body.intel-page main#top { padding: 0; margin: 0; }
body.intel-page footer { display: none; }
.intel-app {
  position: relative; width: 100%;
  height: calc(100vh - 64px);   /* viewport minus the sticky 64px nav */
  min-height: 520px; overflow: hidden; background: var(--panel);
}
.intel-boot {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px; background: var(--bg);
}
.intel-boot-badge {
  font-size: 11px; letter-spacing: .22em; color: var(--cyan);
  border: 1px solid var(--line); border-radius: 6px; padding: 6px 12px;
}
.intel-boot-msg { font-size: 12px; letter-spacing: .06em; color: var(--ink-faint); }
.intel-app.axon-mounted .intel-boot { display: none; }

/* ---------- Digital Twin: research-page lab CTA ---------- */
.twinlab-cta { display:block; margin-top:38px; text-decoration:none; border:1px solid var(--line);
  border-radius:16px; overflow:hidden; background:
    linear-gradient(120% 120% at 80% 0%, color-mix(in srgb, var(--cyan) 12%, transparent), transparent),
    var(--panel); transition:border-color .25s, transform .25s, box-shadow .25s; }
.twinlab-cta:hover { border-color:var(--cyan); transform:translateY(-3px); box-shadow:0 18px 50px rgba(0,0,0,.30); }
.twinlab-cta-body { padding:26px 28px; display:flex; flex-direction:column; gap:9px; }
.twinlab-cta-badge { font-size:10px; letter-spacing:.14em; color:var(--cyan); }
.twinlab-cta-body h3 { font-size:24px; color:var(--ink); }
.twinlab-cta-body p { color:var(--ink-dim); font-size:15px; max-width:64ch; }
.twinlab-cta-go { margin-top:8px; color:var(--amber); font-size:13px; letter-spacing:.04em; }

/* ============ Overview — scrollytelling ============ */
.ov{position:relative}
.ov-scene{min-height:100vh;display:flex;align-items:center;padding:96px 24px;position:relative;scroll-margin-top:64px}
.ov-inner{max-width:var(--maxw);margin:0 auto;width:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.ov-inner.ov-col{grid-template-columns:minmax(0,1fr)}
.ov-inner>*{min-width:0}
.ov-figure>*{max-width:100%;height:auto}
.ov-eg-code{overflow-x:auto;max-width:100%}
.ov-reverse .ov-figure{order:-1}
.ov-copy{max-width:560px}
.ov-copy.ov-center{margin:0 auto;text-align:center}
.ov-step{color:var(--gold);letter-spacing:.22em;font-size:12px;display:block;margin-bottom:18px;opacity:.85}
.ov-copy h2{font-family:var(--font-display);font-size:clamp(28px,3.4vw,44px);line-height:1.08;letter-spacing:-.02em}
.ov-copy p{color:var(--ink-dim);font-size:17px;line-height:1.65;margin-top:16px}
.ov-copy p b{color:var(--ink);font-weight:600}
.ov-aside{color:var(--gold)!important;font-style:italic;opacity:.9}
/* entrance */
.ov-scene .ov-copy,.ov-scene .ov-figure,.ov-scene .ov-eg-grid,.ov-scene .ov-cta-cards{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.ov-scene.in-view .ov-copy{opacity:1;transform:none}
.ov-scene.in-view .ov-figure{opacity:1;transform:none;transition-delay:.12s}
.ov-scene.in-view .ov-eg-grid,.ov-scene.in-view .ov-cta-cards{opacity:1;transform:none;transition-delay:.1s}
/* scene 1 hook */
.ov-hook{overflow:hidden;justify-content:flex-start}
.ov-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5;z-index:0}
.ov-bg-scrim{position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,var(--bg) 6%,rgba(11,16,36,.72) 46%,rgba(11,16,36,.22))}
.ov-hook-copy{position:relative;z-index:2;max-width:680px;margin-left:max(24px,calc((100vw - var(--maxw))/2))}
.ov-hook-copy h1{font-family:var(--font-display);font-size:clamp(40px,6vw,76px);line-height:1.02;letter-spacing:-.03em}
.ov-hook-copy .lit{color:var(--gold)}
.ov-hook-copy p{color:var(--ink-dim);font-size:clamp(16px,1.5vw,20px);line-height:1.6;margin-top:22px;max-width:560px}
.ov-scrollcue{display:inline-block;margin-top:34px;color:var(--gold);letter-spacing:.2em;animation:ovcue 1.8s ease-in-out infinite}

/* About: cinematic video hero */
.about-hero{position:relative;overflow:hidden;min-height:clamp(420px,58vh,620px);display:flex;align-items:flex-end;border-bottom:1px solid var(--line)}
.about-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.about-hero-scrim{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(8,12,28,.32),rgba(8,12,28,.55) 55%,rgba(8,12,28,.92))}
.about-hero-copy{position:relative;z-index:2;padding:80px 0 54px}
.about-hero-copy .eyebrow{color:var(--gold)}
.about-hero-copy h1{font-family:var(--font-display);font-size:clamp(34px,5vw,60px);line-height:1.04;letter-spacing:-.02em;color:#fff;margin:14px 0 0;max-width:20ch}
.about-hero-copy p{color:rgba(255,255,255,.85);font-size:clamp(15px,1.4vw,19px);line-height:1.6;margin-top:20px;max-width:62ch}
@media (prefers-reduced-motion:reduce){ .about-hero-vid{display:none} }
@keyframes ovcue{0%,100%{transform:translateY(0);opacity:.6}50%{transform:translateY(6px);opacity:1}}
/* figures */
.ov-figure{display:flex;align-items:center;justify-content:center;position:relative}
.fig-loop,.fig-mat{width:100%;max-width:420px;height:auto}
.loop-node circle{fill:var(--panel);stroke:var(--gold);stroke-width:1.5}
.loop-node text{fill:var(--ink);font-family:var(--font-mono);font-size:13px;text-anchor:middle;letter-spacing:.08em}
.fig-mat .craft-wire{fill:none;stroke:var(--gold);stroke-width:1.8;opacity:.4;stroke-dasharray:4 5}
.fig-mat .craft-solid{fill:var(--amber-soft);stroke:var(--gold);stroke-width:1.8}
.ov-matlabels{position:absolute;bottom:-2px;left:0;right:0;display:flex;justify-content:space-between;padding:0 6%;color:var(--gold);font-size:11px;letter-spacing:.14em;opacity:.85}
/* scene 4 engines */
.ov-eg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:720px;margin:36px auto 0}
.ov-eg{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:22px 18px;text-align:center;display:flex;flex-direction:column;gap:8px;transition:border-color .3s,transform .3s}
.ov-scene.in-view .ov-eg{animation:ovpop .6s var(--ease) both}
.ov-eg:nth-child(1){animation-delay:.05s}.ov-eg:nth-child(2){animation-delay:.12s}.ov-eg:nth-child(3){animation-delay:.19s}
.ov-eg:nth-child(4){animation-delay:.26s}.ov-eg:nth-child(5){animation-delay:.33s}.ov-eg:nth-child(6){animation-delay:.4s}
@keyframes ovpop{from{opacity:0;transform:translateY(18px) scale(.96)}to{opacity:1;transform:none}}
.ov-eg:hover{border-color:var(--gold);transform:translateY(-3px)}
.ov-eg-code{color:var(--gold);font-size:12px;letter-spacing:.1em}
.ov-eg-name{font-family:var(--font-display);font-size:20px}
.ov-eglink{display:block;text-align:center;margin-top:28px;color:var(--gold);letter-spacing:.06em}
/* scene 5 cta */
.ov-cta-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:820px;margin:36px auto 0}
.ov-cta-cards.ov-cta-4{grid-template-columns:repeat(4,1fr);max-width:1040px}
.ov-cta-card{border:1px solid var(--line);border-radius:14px;background:var(--panel);padding:26px;text-align:left;transition:border-color .3s,transform .3s}
.ov-cta-card:hover{border-color:var(--gold);transform:translateY(-4px)}
.ov-cta-k{color:var(--gold);font-size:11px;letter-spacing:.14em}
.ov-cta-card h3{font-family:var(--font-display);font-size:23px;margin:10px 0 6px}
.ov-cta-card p{color:var(--ink-dim);font-size:14px}
/* progress rail */
.ov-rail{position:fixed;right:26px;top:50%;transform:translateY(-50%);z-index:30;display:flex;flex-direction:column;gap:14px}
.ov-dot{width:11px;height:11px;border-radius:50%;border:1.5px solid var(--line);background:transparent;cursor:pointer;padding:0;transition:all .3s}
.ov-dot:hover{border-color:var(--gold)}
.ov-dot.active{background:var(--gold);border-color:var(--gold);transform:scale(1.25);box-shadow:0 0 0 4px var(--cyan-soft)}
@media (max-width:860px){
  .ov-inner{grid-template-columns:minmax(0,1fr);gap:30px}
  .ov-reverse .ov-figure{order:0}
  .ov-eg-grid,.ov-cta-cards,.ov-cta-cards.ov-cta-4{grid-template-columns:repeat(2,minmax(0,1fr));max-width:560px}
  .ov-rail{right:12px}
}
@media (max-width:560px){
  .ov-eg-grid,.ov-cta-cards,.ov-cta-cards.ov-cta-4{grid-template-columns:minmax(0,1fr)}
  .ov-scene{padding:72px 18px}
}
@media (prefers-reduced-motion:reduce){
  .ov-scene .ov-copy,.ov-scene .ov-figure,.ov-scene .ov-eg-grid,.ov-scene .ov-cta-cards{opacity:1;transform:none;transition:none}
  .ov-scene.in-view .ov-eg{animation:none}
  .ov-scrollcue{animation:none}
}
/* center the closing CTA scene's heading + lede (cards/buttons already centered) */
.ov-cta .ov-inner{text-align:center}
.ov-cta .ov-inner > p{max-width:660px;margin-left:auto;margin-right:auto}
/* ============ lesson concept figures (figures.rs) ============ */
.stage-fig{margin:22px 0 6px;padding:24px;border:1px solid var(--line-soft);border-radius:14px;
  background:radial-gradient(120% 120% at 50% 0%,var(--panel2),var(--panel));text-align:center}
.stage-fig .figsvg{width:100%;max-width:480px;height:auto;display:block;margin:0 auto}
.stage-fig .fig-loop{max-width:300px}
.figlbl{font-family:var(--font-mono);font-size:11px;letter-spacing:.04em}
.stage-fig figcaption{margin-top:14px;color:var(--ink-dim);font-size:12.5px;letter-spacing:.02em}
.fig-pulse{animation:figpulse 1.8s ease-in-out infinite;transform-origin:center}
@keyframes figpulse{0%,100%{opacity:1}50%{opacity:.5}}
@media (prefers-reduced-motion:reduce){.fig-pulse{animation:none}}
.figtok rect{fill:var(--panel2);stroke:var(--gold);stroke-width:1.4}
.figtok text{fill:var(--ink);font-family:var(--font-mono);font-size:11px;text-anchor:middle}
/* Overview hook B-roll: video sits over the still; reduced-motion shows the still */
@media (prefers-reduced-motion:reduce){ .ov-bgvid{display:none} }

/* ============ Lesson lab — full-viewport workspace ============ */
body.lesson-lab { overflow: hidden; }
body.lesson-lab #progress, body.lesson-lab footer { display: none; }
.lab-shell { display: grid; grid-template-columns: 384px minmax(0,1fr); height: calc(100vh - 64px); }
.lab-rail { overflow-y: auto; border-right: 1px solid var(--line); background: var(--bg2); display: flex; flex-direction: column; }
.lab-rail-head { padding: 20px 22px 16px; border-bottom: 1px solid var(--line-soft); }
.lab-rail .crumbs { font-size: 11px; color: var(--ink-faint); margin-bottom: 12px; display: block; }
.lab-rail .crumbs a:hover { color: var(--gold); }
.lab-kind { display: inline-block; font-size: 10px; letter-spacing: .12em; color: var(--gold); border: 1px solid var(--line); border-radius: 5px; padding: 3px 8px; margin-bottom: 12px; }
.lab-title { font-family: var(--font-display); font-size: 22px; line-height: 1.15; }
.lab-obj { color: var(--ink-dim); font-size: 13.5px; margin-top: 8px; line-height: 1.55; }
.lab-steps { flex: 1 0 auto; }
.lab-step { border-bottom: 1px solid var(--line-soft); }
.lab-step > summary { cursor: pointer; list-style: none; padding: 13px 22px; display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-size: 14.5px; color: var(--ink); user-select: none; transition: background .15s; }
.lab-step > summary::-webkit-details-marker { display: none; }
.lab-step > summary::after { content: "+"; margin-left: auto; color: var(--ink-faint); font-family: var(--font-mono); }
.lab-step[open] > summary::after { content: "–"; }
.lab-step > summary:hover { background: var(--panel); }
.lab-step[open] > summary { color: var(--gold); }
.lab-step-n { font-size: 11px; color: var(--gold); border: 1px solid var(--line); border-radius: 4px; padding: 2px 6px; }
.lab-step-body { padding: 2px 22px 18px; color: var(--ink-dim); font-size: 13.5px; line-height: 1.62; }
.lab-step-body.prose :is(h1,h2,h3,h4) { font-size: 14px; color: var(--ink); margin: 12px 0 6px; }
.lab-step-body :is(code) { font-family: var(--font-mono); font-size: 12px; background: var(--panel); padding: 1px 5px; border-radius: 4px; }
.lab-step-body pre { background: #0b0f1a; border: 1px solid var(--line); border-radius: 7px; padding: 10px; overflow: auto; font-size: 12px; }
.lab-step-body pre code { background: none; padding: 0; }
.lab-step-body ul, .lab-step-body ol { padding-left: 18px; }
.lab-step-body .stage-fig { margin: 14px 0 0; padding: 14px; }
.lab-step-body .pass-line { color: var(--ink); font-size: 13px; }
.lab-step-body .pass-tag { color: var(--good); font-size: 10px; border: 1px solid rgba(95,208,138,.4); border-radius: 4px; padding: 2px 6px; }
.lab-step-body .fb-list, .lab-step-body .retrieve-list { margin-top: 8px; }
.lab-rail-nav { display: flex; justify-content: space-between; gap: 10px; padding: 13px 22px; border-top: 1px solid var(--line); position: sticky; bottom: 0; background: var(--bg2); }
.lab-rail-nav .lnav { font-size: 12px; color: var(--ink-dim); max-width: 48%; min-width: 0; overflow-wrap: anywhere; line-height: 1.3; }
.lab-rail-nav .lnav.next { text-align: right; }
.lab-rail-nav .lnav:hover { color: var(--gold); }
.lab-main { position: relative; overflow: hidden; background: radial-gradient(130% 130% at 50% -10%, #11193a, #080d1c); display: flex; }
.lab-stage { flex: 1; min-width: 0; display: flex; position: relative; }
.lab-stage > * { flex: 1; min-width: 0; height: 100%; }
.lab-poster { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 14px; padding: 30px; z-index: 2; }
.lab-poster-title { font-family: var(--font-display); font-size: 26px; }
.lab-poster-desc { color: var(--ink-dim); max-width: 52ch; line-height: 1.6; }
.lab-io { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; max-width: 62ch; margin: 4px 0 2px; background: var(--line-soft); border: 1px solid var(--line-soft); border-radius: 9px; overflow: hidden; text-align: left; }
.lab-io-col { background: var(--bg2); padding: 11px 13px; }
.lab-io-fixed { opacity: .82; }
.lab-io-t { display: block; font-size: 9.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--gold); margin-bottom: 4px; }
.lab-io-fixed .lab-io-t { color: var(--ink-faint); }
.lab-io-col p { margin: 0; font-size: 12px; line-height: 1.4; color: var(--ink-dim); }
@media (max-width: 560px) { .lab-io { grid-template-columns: 1fr; } }
.lab-launch { font-size: 15px; padding: 13px 26px; }
@media (max-width: 900px) {
  body.lesson-lab { overflow: auto; }
  .lab-shell { grid-template-columns: 1fr; height: auto; }
  .lab-rail { border-right: 0; border-bottom: 1px solid var(--line); max-height: none; }
  .lab-main { height: 80vh; }
  .lab-rail-nav { position: static; }
}

/* ============ islands fill the lab workspace ============ */
body.lesson-lab .lab-stage > div:not(.rv3):not(.dv3):not(.rs3):not(.bk3) { height: 100%; width: 100%; display: flex; flex-direction: column; gap: 0; background: #0a0f20; min-width: 0; }
/* the islands' own headers are redundant — the rail carries the title */
body.lesson-lab :is(.cad-eyebrow,.cad-title,.cad-intro,.rs-eyebrow,.rs-title,.rs-intro,.fc-eyebrow,.fc-title,.fc-intro,.bk-eyebrow,.bk-title,.bk-intro,.rv-head,.dv-head,.nb-head) { display: none; }
/* stage row fills as: big viewport | editor+controls */
body.lesson-lab :is(.cad-stage,.rs-stage,.dv-stage,.fc-stage,.bk-stage) { flex: 1 1 auto !important; min-height: 0; display: grid !important; grid-template-columns: 1fr minmax(300px, 38%); gap: 0 !important; flex-wrap: nowrap !important; }
/* three.js / Blockly viewports stretch to fill their cell */
body.lesson-lab :is(.cad-view,.bk-ws) { width: 100% !important; height: 100% !important; max-width: none !important; border: 0 !important; border-radius: 0 !important; flex: none !important; }
/* 2-D sim canvases scale to fit their cell, crisp + centred */
body.lesson-lab :is(.rs-canvas,.dv-canvas,.fc-canvas) { max-width: 100% !important; max-height: 100% !important; width: auto !important; height: auto !important; place-self: center; border-radius: 8px; }
/* editor/controls column fills height; the code editor grows */
body.lesson-lab :is(.cad-side,.rs-side,.dv-side,.fc-side,.bk-right) { min-width: 0 !important; height: 100%; border-left: 1px solid var(--line); padding: 12px !important; background: var(--bg2); display: flex; flex-direction: column; gap: 8px; overflow: auto; }
body.lesson-lab :is(.cad-code,.rs-code,.dv-code,.fc-code) { flex: 1 1 auto !important; min-height: 120px !important; max-height: none !important; resize: none !important; border-radius: 6px; }
body.lesson-lab :is(.cad-out,.rs-out,.dv-out,.fc-out,.bk-code) { flex: 0 0 auto; max-height: 30% !important; }
@media (max-width: 900px) {
  body.lesson-lab :is(.cad-stage,.rs-stage,.dv-stage,.fc-stage,.bk-stage) { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
}

body.lesson-lab .cad-view canvas { width:100% !important; height:100% !important; display:block; }

/* notebook + blockly fill the lab workspace */
body.lesson-lab .nb-wrap { height: 100%; overflow-y: auto; padding: 20px 24px; background: #0a0f20; }
body.lesson-lab .nb-cell { max-width: 980px; margin: 0 auto 14px; }
body.lesson-lab .nb-code { min-height: 130px; }
body.lesson-lab .bk-canvas { width: 100% !important; height: auto !important; max-width: 260px; align-self: center; border-radius: 8px; }
body.lesson-lab .bk-code { flex: 0 0 auto; }

/* The lab is a coding IDE — always dark, regardless of the site theme, so the
   islands' editors/canvases (built with dark colours) stay readable in light
   mode. Scoped to .lab-shell so the top nav still follows the site theme. */
.lab-shell {
  color-scheme: dark;
  --bg:#0B1024; --bg2:#0E1430; --panel:#121A3A; --panel2:#172145;
  --line:#2A3560; --line-soft:#1E2750;
  --ink:#EEF1F8; --ink-dim:#9AA6C6; --ink-faint:#67729A;
  --cyan:#CFAA5B; --cyan-soft:rgba(207,170,91,.13);
  --amber:#E3C77E; --amber-soft:rgba(227,199,126,.14);
  --gold:#CFAA5B; --good:#5FD08A; --btn-ink:#0B1024;
  /* re-anchor inherited text/bg to the dark tokens so descendants without an
     explicit color (e.g. the rail prose) don't inherit the site theme's ink */
  color: var(--ink);
  background: var(--bg);
}
.lab-shell .lab-step-body, .lab-shell .lab-obj { color: var(--ink-dim); }
.lab-shell .lab-step > summary, .lab-shell .lab-title, .lab-shell .lab-step-body :is(h1,h2,h3,h4,b,strong) { color: var(--ink); }

/* code notebook cells: stable height (no per-keystroke jump), internal scroll +
   drag-resize; capped output so long results don't reflow the page */
body.lesson-lab .nb-code { resize: vertical; overflow-y: auto; }
body.lesson-lab .nb-out { max-height: 300px; overflow: auto; }

/* factory: the production line is landscape — stack the sim over the editor in
   the lab (uses the tall pane better than a side-by-side that left whitespace) */
body.lesson-lab .fc-stage { grid-template-columns: 1fr !important; grid-template-rows: minmax(0,1.15fr) minmax(0,1fr) !important; }
body.lesson-lab .fc-side { border-left: 0 !important; border-top: 1px solid var(--line); }

/* ---------- XR · dedicated immersive WebXR experience ---------- */
body.xr-page { overflow: hidden; }
body.xr-page #progress, body.xr-page footer { display: none; }
body.xr-page main#top { padding: 0; margin: 0; }
.xr-app { position: relative; width: 100%; height: calc(100vh - 64px); min-height: 520px; overflow: hidden; background: #070b18; color-scheme: dark; }
.xr-boot { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; background: #070b18; z-index: 3; }
.xr-boot-badge { font-size: 11px; letter-spacing: .22em; color: #CFAA5B; border: 1px solid #2A3560; border-radius: 6px; padding: 6px 12px; }
.xr-boot-msg { font-size: 12px; letter-spacing: .06em; color: #67729A; }
.xr-app.axon-mounted .xr-boot { display: none; }
.xr-host { position: absolute; inset: 0; }
.xr-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: grab; touch-action: none; }
.xr-canvas:active { cursor: grabbing; }
.xr-ui { position: absolute; inset: 0; pointer-events: none; z-index: 2; }
.xr-badge { position: absolute; top: 16px; left: 18px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .22em; color: #CFAA5B; border: 1px solid rgba(207,170,91,.35); border-radius: 6px; padding: 6px 12px; background: rgba(7,11,24,.6); }
.xr-label { position: absolute; top: 14px; left: 50%; transform: translateX(-50%); max-width: 80%; font-size: 12.5px; letter-spacing: .03em; color: #EEF1F8; background: rgba(7,11,24,.85); border: 1px solid rgba(207,170,91,.4); border-radius: 8px; padding: 8px 14px; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.xr-controls { position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 9px; pointer-events: auto; }
.xr-enter { font-family: var(--font-mono); font-size: 13px; letter-spacing: .05em; cursor: pointer; padding: 13px 28px; border-radius: 8px; border: 1px solid #E3C77E; color: #0B1024; background: #E3C77E; transition: transform .15s, box-shadow .2s; }
.xr-enter:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 8px 26px rgba(227,199,126,.32); }
.xr-enter:disabled { opacity: .65; cursor: default; }
.xr-enter--off { background: transparent; color: #9AA6C6; border-color: #2A3560; }
.xr-hint { font-size: 11px; letter-spacing: .08em; color: #8893b5; background: rgba(7,11,24,.5); padding: 4px 11px; border-radius: 5px; }

/* ---------- The Lab — gallery of runnable benches (/labs) ---------- */
.lab-gal-readout { display:flex; gap:8px 16px; flex-wrap:wrap; margin-top:18px; font-size:12.5px;
  letter-spacing:.04em; color:var(--ink-faint); align-items:baseline; }
.lab-gal-readout b { color:var(--cyan); font-family:var(--font-display); font-size:15px; margin-right:4px; }
.lab-gal-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:30px; }
@media (max-width:980px){ .lab-gal-grid { grid-template-columns:repeat(2,1fr); } }
@media (max-width:620px){ .lab-gal-grid { grid-template-columns:1fr; } }
.lab-tile { display:flex; flex-direction:column; border:1px solid var(--line-soft); border-radius:14px;
  overflow:hidden; background:var(--panel); transition:border-color .2s var(--ease-ui,ease),
  transform .2s var(--ease-ui,ease), box-shadow .25s; }
.lab-tile:hover { border-color:var(--kind,var(--cyan)); transform:translateY(-3px); box-shadow:0 14px 40px rgba(0,0,0,.3); }
/* kind header is always navy so the accent colours read in light + dark */
.lab-tile-top { position:relative; height:92px; display:flex; align-items:center; justify-content:space-between;
  padding:0 16px; border-bottom:1px solid var(--line-soft);
  background:linear-gradient(135deg, color-mix(in oklab, var(--kind,#CFAA5B) 24%, #0e1430), #0c1226); }
.lab-glyph { width:44px; height:44px; color:var(--kind,#CFAA5B); flex:0 0 auto; }
.lab-kind-badge { font-size:9.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--kind,#CFAA5B);
  border:1px solid color-mix(in oklab, var(--kind,#CFAA5B) 45%, transparent); border-radius:5px;
  padding:4px 8px; background:rgba(7,11,24,.4); white-space:nowrap; }
.lab-tile-body { padding:15px 18px 18px; display:flex; flex-direction:column; gap:7px; flex:1; }
.lab-tile-meta { font-size:10px; letter-spacing:.09em; color:var(--ink-faint); text-transform:uppercase; }
.lab-tile-body h3 { font-size:16.5px; line-height:1.22; }
.lab-tile-body p { font-size:13px; color:var(--ink-dim); flex:1; line-height:1.45; }
.lab-run { margin-top:8px; font-size:11.5px; letter-spacing:.05em; color:var(--amber);
  transition:transform .2s var(--ease-ui,ease); }
.lab-tile:hover .lab-run { transform:translateX(3px); }
/* kind tints — the --kind prop drives glyph, badge, hover border, header wash */
.lab-tile.k-sim { --kind:#CFAA5B; }
.lab-tile.k-cad { --kind:#C792EA; }
.lab-tile.k-fw  { --kind:#FF8A8A; }
.lab-tile.k-vis { --kind:#6FA8FF; }
.lab-tile.k-fac { --kind:#5FD08A; }
.lab-tile.k-py  { --kind:#E3C77E; }

/* ---------- Progress dashboard (/progress) ---------- */
.pg-boot { color:var(--ink-faint); font-family:var(--font-mono); font-size:12px; padding:30px 0; }
.pg-stats { display:grid; grid-template-columns:repeat(5,1fr); gap:14px; margin-bottom:8px; }
@media (max-width:760px){ .pg-stats { grid-template-columns:repeat(2,1fr); } }
.pg-stat { border:1px solid var(--line-soft); border-radius:12px; padding:16px 18px; background:var(--panel); display:flex; flex-direction:column; gap:4px; }
.pg-stat b { font-family:var(--font-display); font-size:29px; font-weight:600; color:var(--ink); letter-spacing:-.01em; font-variant-numeric:tabular-nums; }
.pg-stat span { font-family:var(--font-mono); font-size:10px; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-faint); }
.pg-stat.pg-gold b { color:var(--cyan); } .pg-stat.pg-streak b { color:var(--amber); }

.pg-due { border:1px solid var(--line-soft); border-radius:14px; padding:20px 22px; margin:26px 0 34px; background:var(--panel); }
.pg-due-on { border-color:rgba(207,170,91,.5); background:linear-gradient(180deg, rgba(207,170,91,.07), var(--panel)); }
.pg-due-head { font-size:12px; letter-spacing:.05em; color:var(--cyan); margin-bottom:6px; }
.pg-due-sub { font-size:13px; color:var(--ink-dim); }
.pg-due-list { display:flex; flex-direction:column; gap:8px; margin-top:14px; }
.pg-due-item { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:11px 14px; border:1px solid var(--line-soft); border-radius:9px; background:var(--bg2); transition:border-color .15s var(--ease-ui,ease); }
.pg-due-item:hover { border-color:var(--cyan); }
.pg-due-title { font-size:14px; color:var(--ink); }
.pg-due-go { font-size:11px; color:var(--amber); white-space:nowrap; }

.pg-course { font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-faint); margin:26px 0 14px; }
.pg-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(228px,1fr)); gap:12px; }
.pg-skill { display:flex; flex-direction:column; gap:7px; padding:14px 15px; border:1px solid var(--line-soft); border-radius:11px; background:var(--panel); transition:border-color .15s var(--ease-ui,ease), transform .15s var(--ease-ui,ease); }
.pg-skill:hover { border-color:var(--line); transform:translateY(-2px); }
.pg-skill-kind { font-size:9px; letter-spacing:.09em; text-transform:uppercase; color:var(--ink-faint); }
.pg-skill-title { font-size:14px; color:var(--ink); line-height:1.25; flex:1; }
.pg-bar { height:5px; border-radius:3px; background:var(--line-soft); overflow:hidden; margin-top:2px; }
.pg-bar i { display:block; height:100%; border-radius:3px; background:linear-gradient(90deg,var(--cyan),var(--amber)); }
.pg-skill-tier { font-size:10px; letter-spacing:.05em; color:var(--ink-faint); }
.pg-skill.t0 { opacity:.6; }
.pg-skill.t2 .pg-skill-tier { color:#6FA8FF; }
.pg-skill.t3 .pg-skill-tier { color:var(--amber); }
.pg-skill.t4 { border-color:rgba(207,170,91,.5); }
.pg-skill.t4 .pg-skill-tier { color:var(--cyan); }
.pg-skill-due { border-color:rgba(207,170,91,.6) !important; }
.pg-skill-due .pg-skill-tier { color:var(--cyan) !important; }

/* ---------- tuner — linked-slider intuition widget (lesson Model step) ---------- */
.tuner { margin:14px 0 4px; border:1px solid var(--line); border-radius:10px; padding:12px; background:var(--bg2); }
.tuner-head { font-size:10px; letter-spacing:.08em; text-transform:uppercase; color:var(--cyan); margin-bottom:8px; }
.tuner-cv { width:100%; height:168px; display:block; border-radius:6px; border:1px solid var(--line-soft); }
.tuner-ctl { display:flex; align-items:center; gap:10px; margin-top:9px; }
.tuner-ctl label { font-family:var(--font-mono); font-size:11px; color:var(--ink-dim); width:62px; flex:0 0 auto; }
.tuner-ctl label b { color:var(--cyan); font-variant-numeric:tabular-nums; }
.tuner-ctl input[type=range] { flex:1; accent-color:var(--cyan); cursor:pointer; }
.tuner-read { display:flex; gap:18px; margin-top:10px; font-size:10.5px; color:var(--ink-faint); letter-spacing:.04em; }
.tuner-read b { color:var(--ink); font-variant-numeric:tabular-nums; }
.tuner-note { color:var(--cyan); }

/* reading tools — lesson Summarize + Translate (in the lab rail) */
.rt { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-top:14px; }
.rt-btn { font-family:var(--font-mono); font-size:11px; letter-spacing:.03em; color:var(--cyan); background:transparent; border:1px solid var(--line); border-radius:7px; padding:6px 11px; cursor:pointer; transition:border-color .15s, color .15s; }
.rt-btn:hover { border-color:var(--cyan); }
.rt-lang { display:inline-flex; align-items:center; gap:6px; border:1px solid var(--line); border-radius:7px; padding:3px 8px 3px 10px; }
.rt-globe { font-size:12px; }
.rt-sel { background:transparent; border:0; color:var(--ink-dim); font-family:var(--font-mono); font-size:11px; cursor:pointer; outline:none; }
.rt-sel option { background:var(--panel); color:var(--ink); }
.rt-out { width:100%; margin-top:10px; border:1px solid var(--line-soft); border-radius:9px; background:var(--bg2); padding:12px 14px; font-size:13px; color:var(--ink-dim); }
.rt-out.rt-loading { color:var(--ink-faint); font-family:var(--font-mono); font-size:12px; }
.rt-out-head { display:flex; justify-content:space-between; align-items:center; font-size:10px; letter-spacing:.08em; text-transform:uppercase; color:var(--cyan); margin-bottom:8px; }
.rt-x { background:none; border:0; color:var(--ink-faint); font-size:16px; line-height:1; cursor:pointer; }
.rt-x:hover { color:var(--ink); }
.rt-list { margin:0; padding-left:18px; display:flex; flex-direction:column; gap:6px; }
.rt-list li { color:var(--ink); font-size:13px; line-height:1.4; }
.rt-note { color:var(--ink-faint); font-size:12px; }

/* ── Perception "machine vision" voxel-occupancy hero ───────────────────── */
.occ-hero { position:relative; overflow:hidden; min-height:clamp(420px, 64vh, 660px);
  display:flex; align-items:flex-end; border-bottom:1px solid var(--line);
  background:radial-gradient(130% 105% at 50% 12%, #122c4a 0%, #0a1626 55%, #060d18 100%); }
.occ-stage { position:absolute; inset:0; z-index:1; }
canvas.occ-canvas { width:100% !important; height:100% !important; display:block; cursor:grab; }
canvas.occ-canvas:active { cursor:grabbing; }
/* bottom-up legibility scrim (lets pointer drags pass through to the canvas) */
.occ-hero::after { content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:linear-gradient(to top, rgba(7,14,26,.86) 0%, rgba(7,14,26,.5) 38%, rgba(7,14,26,0) 76%); }
.occ-hero-inner { position:relative; z-index:2; width:100%;
  padding-top:clamp(64px,12vh,120px); padding-bottom:clamp(30px,6vh,60px); }
/* the voxel field is always dark — force light text regardless of color theme */
.occ-hero-inner, .occ-hero-inner p { color:#c8d6ec; }
.occ-hero-inner h1 { color:#fff; }
.occ-hero-inner .kicker { color:#9fb6e6; }
.occ-hero-inner .group-back a { color:#9fb6e6; }
.occ-hero-inner .group-back a:hover { color:#cfe0ff; }
.occ-tag { display:inline-block; margin-top:18px; color:#e3c77e; font-size:11px; letter-spacing:.08em; }
.occ-fallback { background:radial-gradient(130% 105% at 50% 12%, #163358 0%, #0a1626 60%, #060d18 100%); }
@media (max-width: 640px){ .occ-hero { min-height:clamp(360px, 56vh, 480px); } }

/* raw-camera ↔ occupancy view toggle (created by occupancy.js) */
.occ-toggle { position:absolute; top:18px; right:18px; z-index:3; display:flex; gap:2px;
  background:rgba(8,16,30,.55); border:1px solid rgba(159,182,230,.22); border-radius:999px;
  padding:3px; backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px); }
.occ-toggle button { background:none; border:0; color:#9fb6e6; font-size:11px; letter-spacing:.03em;
  padding:6px 13px; border-radius:999px; cursor:pointer; transition:color .2s, background .2s; white-space:nowrap; }
.occ-toggle button:hover { color:#cfe0ff; }
.occ-toggle button.on { background:rgba(207,170,91,.16); color:#e3c77e; }
@media (max-width:640px){ .occ-toggle { top:14px; right:14px; } .occ-toggle button { padding:5px 9px; font-size:10px; } }

/* ── Digital Twin · the Determinism Case (claims tree + coverage map) ──────── */
.dc-case { position:relative; display:grid; grid-template-columns:minmax(210px,.82fr) 1.18fr; margin-top:6px;
  border:1px solid var(--line); border-radius:14px; overflow:hidden; background:rgba(127,147,180,.05); }
.dc-radio { position:absolute; width:1px; height:1px; opacity:0; pointer-events:none; }
.dc-claims { display:flex; flex-direction:column; border-right:1px solid var(--line); }
.dc-claim { display:flex; align-items:center; gap:10px; padding:15px 17px; cursor:pointer;
  border-bottom:1px solid var(--line); transition:background .2s; }
.dc-claim:last-child { border-bottom:0; }
.dc-claim:hover { background:rgba(127,147,180,.07); }
.dc-claim-t { flex:1; font-weight:550; font-size:14px; color:var(--ink); }
.dc-dot { width:9px; height:9px; border-radius:50%; flex:0 0 auto; }
.dc-dot.dc-established { background:#4caf80; } .dc-dot.dc-progressing { background:#d4a93f; } .dc-dot.dc-frontier { background:#8593ad; }
.dc-status { font-size:9px; letter-spacing:.08em; text-transform:uppercase; opacity:.92; }
.dc-status.dc-established { color:#4caf80; } .dc-status.dc-progressing { color:#c39a3a; } .dc-status.dc-frontier { color:#8593ad; }
.dc-detail { position:relative; padding:22px 24px; min-height:248px; }
.dc-panel { display:none; }
.dc-statement { font-size:16px; line-height:1.5; margin:0 0 16px; color:var(--ink); }
.dc-branch { margin-top:14px; padding-left:15px; border-left:2px solid var(--line); }
.dc-branch-k { display:block; font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--cyan,#5fb6d4); margin-bottom:6px; }
.dc-branch ul { margin:0; padding-left:16px; }
.dc-branch li { font-size:13px; line-height:1.55; color:var(--ink-dim); margin-bottom:5px; }
#dc-0:checked ~ .dc-detail .dc-panel-0, #dc-1:checked ~ .dc-detail .dc-panel-1,
#dc-2:checked ~ .dc-detail .dc-panel-2, #dc-3:checked ~ .dc-detail .dc-panel-3 { display:block; }
#dc-0:checked ~ .dc-claims label[for="dc-0"], #dc-1:checked ~ .dc-claims label[for="dc-1"],
#dc-2:checked ~ .dc-claims label[for="dc-2"], #dc-3:checked ~ .dc-claims label[for="dc-3"] {
  background:rgba(227,199,126,.1); box-shadow:inset 3px 0 0 #e3c77e; }
.dc-radio:focus-visible ~ .dc-claims label { outline:2px solid var(--cyan,#5fb6d4); outline-offset:-2px; }
.dc-cov { margin-top:24px; }
.dc-cov-head { display:flex; align-items:baseline; justify-content:space-between; gap:16px; margin-bottom:12px; flex-wrap:wrap; }
.dc-cov-head h3 { margin:0; font-size:16px; }
.dc-legend { display:flex; gap:14px; font-size:10px; color:var(--ink-dim); }
.dc-legend > span { display:inline-flex; align-items:center; gap:6px; }
.dc-grid { display:grid; grid-template-columns:minmax(116px,1.5fr) repeat(4,1fr); gap:4px; }
.dc-cell { padding:9px 8px; font-size:12px; display:flex; align-items:center; justify-content:center; border-radius:6px; }
.dc-corner { color:var(--ink-faint,#7f93b4); font-size:8.5px; letter-spacing:.04em; justify-content:flex-start; }
.dc-colh { color:var(--ink-dim); font-size:9px; letter-spacing:.05em; text-transform:uppercase; }
.dc-rowh { background:rgba(127,147,180,.05); justify-content:flex-start; color:var(--ink); font-size:12.5px; }
.dc-c { font-weight:700; font-size:13px; cursor:default; }
.dc-c.dc-established { background:rgba(76,175,128,.15); color:#4caf80; }
.dc-c.dc-progressing { background:rgba(207,159,58,.15); color:#cf9f3a; }
.dc-c.dc-frontier { background:rgba(127,147,180,.07); color:#7e8ca6; }
.dc-c:hover { outline:1px solid rgba(127,147,180,.35); }
.dc-cov-note { margin-top:12px; font-size:12px; color:var(--ink-dim); }
@media (max-width:720px){
  .dc-case { grid-template-columns:1fr; }
  .dc-claims { border-right:0; border-bottom:1px solid var(--line); }
  .dc-detail { min-height:0; }
  .dc-grid { grid-template-columns:minmax(80px,1.3fr) repeat(4,1fr); gap:3px; }
  .dc-colh { font-size:7.5px; } .dc-cell { padding:7px 4px; }
}