/* ===== Data Visualization Study App - redesigned UI ===== */
/* Cohesive LIGHT theme by default; body.theme-dark for dark.
   Charts use --c-* chart-chrome vars (light panel + dark axes in light,
   dark panel + light axes in dark) so they blend with the page. */
:root{
  --bg:#f4f7fc; --bg2:#eef3fa; --panel:#ffffff; --panel2:#f1f5fb;
  --ink:#1c2734; --text:#37475a; --muted:#6b7a8c; --line:#e4eaf2;
  --strong:#111b27; --head:#2a4d86;
  --accent:#4361ee; --accent-soft:#eaeefe; --accent2:#0d9488; --gold:#b7791f; --pink:#db2777; --on-accent:#fff;
  --hover:rgba(67,97,238,.07); --zebra:rgba(20,40,80,.028);
  /* chart chrome (light) */
  --c-surface:#f7faff; --c-panel:#eef3fb; --c-axis:#758598; --c-ink:#33445a; --c-grid:#e3eaf4; --c-stripe:#e3ecf7;
  --radius:16px;
  --sb:clamp(192px, 15.5vw, 234px);   /* fluid sidebar width */
  --shadow:0 1px 2px rgba(16,30,54,.04), 0 10px 26px rgba(16,30,54,.07);
  --shadow-sm:0 1px 2px rgba(16,30,54,.05);
}
body.theme-dark{
  --bg:#0b1622; --bg2:#0f1f2e; --panel:#13283b; --panel2:#16304a;
  --ink:#eef5fb; --text:#cfe0ee; --muted:#90a8bd; --line:#23425e;
  --strong:#ffffff; --head:#bcd6f5;
  --accent:#6c8cff; --accent-soft:rgba(108,140,255,.16); --accent2:#2dd4bf; --gold:#ffd166; --pink:#ff5d8f;
  --hover:rgba(108,140,255,.12); --zebra:rgba(255,255,255,.025);
  --c-surface:#0f1f2e; --c-panel:#13283b; --c-axis:#9bb8cc; --c-ink:#e7f0f7; --c-grid:#33506a; --c-stripe:#1d3b57;
  --shadow:0 8px 28px rgba(0,0,0,.35); --shadow-sm:0 2px 8px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
/* fluid root font: scales the whole UI with the viewport so it stays
   proportionate across Mac/Windows and different display-scaling settings */
html{font-size:clamp(12.5px, 0.62vw + 7.4px, 15.5px); -webkit-text-size-adjust:100%; text-size-adjust:100%}
html,body{margin:0;min-height:100%}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:1rem; line-height:1.6;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  min-height:100vh;
}
a{color:var(--accent); text-decoration:none}
::selection{background:var(--accent-soft)}

/* ---- sidebar (floating, always-visible) ---- */
.sidebar{
  width:var(--sb); background:var(--panel);
  border:1px solid var(--line); border-radius:16px; padding:16px 14px;
  position:fixed; top:14px; left:14px; bottom:14px; overflow-y:auto;
  box-shadow:var(--shadow); z-index:50;
}
.brand{display:flex;align-items:center;gap:11px;padding:4px 6px 16px;border-bottom:1px solid var(--line);margin-bottom:14px}
.brand .logo{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:transparent;box-shadow:none}
.brand .logo img{width:100%;height:100%;display:block;object-fit:contain}
.brand b{font-size:15px;letter-spacing:-.2px;color:var(--strong)}
.brand small{display:block;color:var(--muted);font-size:11px;margin-top:1px}
#nav{display:flex;flex-direction:column;gap:2px}
#nav a{color:var(--text);padding:9px 12px;border-radius:10px;font-weight:500;font-size:14px;display:flex;align-items:center;transition:background .12s,color .12s}
#nav a:hover{background:var(--hover);color:var(--ink)}
#nav a.active{background:var(--accent-soft);color:var(--accent);font-weight:650}
.side-foot{margin-top:18px;padding:12px 6px 6px;color:var(--muted);font-size:11px;border-top:1px solid var(--line)}
.theme-btn{width:100%;margin-bottom:12px;background:var(--panel2);color:var(--text);border:1px solid var(--line);padding:9px 10px;border-radius:10px;font-weight:600;font-size:13px;cursor:pointer;transition:.12s}
.theme-btn:hover{border-color:var(--accent);color:var(--accent)}

/* ---- main ---- */
main{margin-left:calc(var(--sb) + 30px);min-width:0;padding:clamp(22px,2.4vw,34px) clamp(18px,3vw,44px) 90px;max-width:1020px}
h1{font-size:2rem;margin:0 0 8px;letter-spacing:-.7px;color:var(--strong);font-weight:800;line-height:1.15}
h2{font-size:1.3rem;margin:30px 0 12px;color:var(--strong);font-weight:700;letter-spacing:-.3px}
h3{margin:0 0 6px;color:var(--strong);font-weight:650}
.sub{color:var(--muted);font-size:1rem;margin:0 0 8px;line-height:1.5}
.badge{display:inline-block;background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:700;padding:4px 10px;border-radius:20px;letter-spacing:.3px;margin-bottom:10px}
.section-title{border-left:3px solid var(--accent);padding-left:11px}

/* hero - soft accent banner (light) */
.hero{padding:30px 32px;border-radius:var(--radius);background:linear-gradient(135deg,var(--accent-soft),var(--panel) 70%);box-shadow:var(--shadow);border:1px solid var(--line);margin-bottom:26px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(67,97,238,.12),transparent 70%)}
.hero h1{color:var(--strong);position:relative}
.hero .sub{color:var(--text);max-width:680px;position:relative}
.exam-banner{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);margin:-10px 0 22px}
.exam-banner div{background:var(--panel);padding:14px 16px;min-width:0}
.exam-banner span{display:block;color:var(--muted);font-size:10px;font-weight:800;letter-spacing:.7px;text-transform:uppercase;margin-bottom:4px}
.exam-banner b{display:block;font-size:13px;line-height:1.35}
.source-note{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px;margin-top:20px}

/* cards */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-sm)}
.grid{display:grid;gap:16px}
.cards-grid{grid-template-columns:repeat(auto-fit,minmax(232px,1fr))}
.lecture-card{transition:transform .16s,box-shadow .16s,border-color .16s;position:relative}
.lecture-card:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:var(--shadow)}
.lecture-card h3{font-size:17px}
.lecture-card p{color:var(--muted);font-size:13px;margin:6px 0 10px}
.card-link{color:var(--accent);font-weight:700;font-size:13px}
.stat-grid{grid-template-columns:repeat(auto-fit,minmax(145px,1fr));margin-bottom:16px}
.stat-card{display:flex;flex-direction:column;gap:3px;transition:.15s}
.stat-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.stat-card strong{font-size:30px;line-height:1;color:var(--accent)}
.stat-card span{font-size:12px;color:var(--muted)}
.steps{grid-template-columns:repeat(auto-fit,minmax(212px,1fr))}
.steps .card{position:relative;padding-top:36px}
.step-n{position:absolute;top:14px;left:16px;width:26px;height:26px;border-radius:8px;background:var(--accent);color:#fff;font-weight:800;display:grid;place-items:center;font-size:13px}
.steps b{display:block;margin-bottom:4px;color:var(--strong)}
.steps p{color:var(--muted);font-size:13px;margin:0}
.big-list{padding-left:20px}
.big-list li{margin:8px 0}

/* page head + chapter */
.page-head{margin-bottom:20px}
.lecture-jump{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.lecture-jump a{font-size:12px;background:var(--panel);border:1px solid var(--line);padding:5px 11px;border-radius:20px;color:var(--muted);transition:.12s}
.lecture-jump a:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.lec-section{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin-bottom:18px;box-shadow:var(--shadow-sm);scroll-margin-top:20px}
.lec-section h2{margin-top:0;color:var(--head)}
ul.pts{margin:0;padding-left:20px}
ul.pts li{margin:8px 0}
b{color:var(--strong);font-weight:650}
.callout{margin-top:14px;padding:12px 15px;border-radius:12px;font-size:14px}
.callout.key{background:rgba(183,121,31,.1);border:1px solid rgba(183,121,31,.32)}
.callout.tip{background:rgba(13,148,136,.09);border:1px solid rgba(13,148,136,.3)}
.page-foot{margin-top:10px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}

/* demos - blend with page (light surface in light mode) */
.demo-box{margin-top:16px;background:var(--c-surface);border:1px solid var(--line);border-radius:13px;padding:16px;position:relative;box-shadow:var(--shadow-sm)}
.demo-tag{position:absolute;top:-9px;left:16px;background:var(--accent);color:#fff;font-size:10px;font-weight:700;padding:3px 9px;border-radius:8px;letter-spacing:.4px;box-shadow:var(--shadow-sm)}
.demo-note{color:var(--muted);font-size:12.5px;margin:12px 0 0;line-height:1.5}
.demo-controls{display:flex;flex-wrap:wrap;gap:9px;align-items:center;margin-bottom:13px}
.demo-controls label{color:var(--muted);font-size:13px;display:flex;align-items:center;gap:8px}
.demo-output{margin-top:11px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-size:13.5px;min-height:20px;color:var(--text)}
.preatt-grid{display:flex;flex-wrap:wrap;gap:2px 6px;font-family:ui-monospace,Menlo,monospace;font-size:15px;color:var(--ink);max-width:560px}
.preatt-grid span{width:14px;text-align:center}
.spark-row{display:flex;align-items:center;gap:8px;margin:6px 0;font-size:14px;color:var(--muted)}
.spark-tag{font-size:10px;font-weight:800;padding:2px 6px;border-radius:5px}
.spark-tag.good{background:rgba(13,148,136,.16);color:var(--accent2)}
.spark-tag.bad{background:rgba(219,39,119,.16);color:var(--pink)}

/* buttons / pills */
.btn{background:var(--accent);color:#fff;border:none;padding:9px 16px;border-radius:10px;font-weight:650;font-size:14px;cursor:pointer;box-shadow:var(--shadow-sm);transition:.12s}
.btn:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn:disabled{opacity:.45;cursor:default;filter:none;transform:none}
.btn-ghost{background:var(--panel);color:var(--text);border:1px solid var(--line);box-shadow:none}
.btn-ghost:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.chip{font-size:13px;padding:6px 12px}
.pill{display:inline-block;background:var(--accent-soft);border:1px solid transparent;color:var(--accent);border-radius:20px;padding:3px 10px;font-size:12px;margin:2px;font-weight:650}

/* lab */
.lab-grid{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.lab-card h3{font-size:16px;color:var(--head)}
.lab-sub{color:var(--muted);font-size:13px;margin:2px 0 0}

/* quiz */
.quiz-filters{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.shuffle-lbl{color:var(--muted);font-size:13px;display:flex;gap:6px;align-items:center;margin-left:6px}
.quiz-card .quiz-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;margin-bottom:8px}
.quiz-q{font-size:1.25rem;margin:4px 0 16px;color:var(--strong);font-weight:700;line-height:1.4}
.quiz-opts{display:flex;flex-direction:column;gap:9px}
.opt{text-align:left;background:var(--panel);border:1px solid var(--line);color:var(--text);padding:12px 15px;border-radius:11px;cursor:pointer;font-size:14.5px;transition:.12s}
.opt:hover:not(:disabled){border-color:var(--accent);background:var(--accent-soft)}
.opt.correct{background:rgba(13,148,136,.14);border-color:var(--accent2);color:var(--strong)}
.opt.wrong{background:rgba(219,39,119,.12);border-color:var(--pink);color:var(--strong)}
.quiz-exp{margin-top:14px;font-size:14px;color:var(--text);max-height:0;overflow:hidden;transition:.2s}
.quiz-exp.show{max-height:320px;padding:13px 15px;background:var(--panel2);border:1px solid var(--line);border-radius:11px}
.quiz-nav{margin-top:16px;text-align:right}
.quiz-done{text-align:center;padding:36px}
.quiz-done h2{font-size:34px}
.type-pill{background:var(--panel2);color:var(--muted);border-color:var(--line)}
.result-ring{width:112px;height:112px;border-radius:50%;display:grid;place-items:center;margin:0 auto 8px;background:conic-gradient(var(--accent) 0 var(--score),var(--panel2) var(--score));border:8px solid var(--accent-soft);font-size:27px;font-weight:800;color:var(--strong)}
.result-table{max-width:440px;margin:18px auto;text-align:left}
.result-table td:first-child{width:45%}
.quiz-done .page-foot{justify-content:center}
.opt:focus-visible,.btn:focus-visible,#nav a:focus-visible,.flashcard:focus-visible{outline:3px solid rgba(67,97,238,.35);outline-offset:2px}

/* flashcards (accent-gradient faces in both themes) */
.fc-stage{display:flex;flex-direction:column;align-items:center;margin-top:10px}
.flashcard{width:min(560px,92%);height:264px;perspective:1300px;cursor:pointer}
.fc-inner{position:relative;width:100%;height:100%;transition:transform .55s cubic-bezier(.4,.2,.2,1);transform-style:preserve-3d}
.flashcard.flipped .fc-inner{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:18px;border:1px solid transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:26px;text-align:center;box-shadow:var(--shadow);color:#fff}
.fc-front{background:linear-gradient(135deg,#4361ee,#5b6cf0)}
.fc-back{background:linear-gradient(135deg,#0d9488,#0ea5a4);transform:rotateY(180deg)}
.fc-label{font-size:11px;letter-spacing:2px;color:rgba(255,255,255,.8);font-weight:800;margin-bottom:14px}
.fc-text{font-size:24px;font-weight:750;color:#fff}
.fc-text.small{font-size:17px;font-weight:500;line-height:1.55;color:rgba(255,255,255,.96)}
.fc-hint{position:absolute;bottom:14px;font-size:11px;color:rgba(255,255,255,.7)}
.fc-controls{display:flex;gap:10px;margin-top:18px}
.fc-count{margin-top:12px;color:var(--muted);font-size:13px}

/* exam */
.exam-list{display:flex;flex-direction:column;gap:10px}
.exam-item{padding:0;overflow:hidden;transition:border-color .12s}
.exam-item:hover{border-color:var(--accent)}
.exam-q{padding:15px 18px;cursor:pointer;font-weight:600;display:flex;align-items:center;gap:8px;color:var(--strong)}
.exam-toggle{margin-left:auto;color:var(--accent);font-size:20px;font-weight:800}
.exam-a{max-height:0;overflow:hidden;transition:.25s;padding:0 18px;color:var(--text);font-size:14px;line-height:1.65}
.exam-item.open .exam-a{max-height:520px;padding:0 18px 16px}

/* cheat */
.cheat-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.cheat h3{color:var(--accent);border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:8px}
.cheat ul{margin:0;padding-left:18px}
.cheat li{margin:6px 0;font-size:13.5px}

/* rich content blocks */
.blk-p{margin:9px 0;color:var(--text)}
.blk-note{color:var(--muted);font-size:12.5px;font-style:italic;margin:8px 0;border-left:2px solid var(--line);padding-left:11px}
.sec-n{color:var(--accent);font-weight:800;margin-right:8px;font-variant-numeric:tabular-nums}

/* tables */
.table-wrap{overflow-x:auto;margin:13px 0;border-radius:12px;border:1px solid var(--line)}
table.dv-table{border-collapse:collapse;width:100%;font-size:13.5px}
.dv-table th{text-align:left;background:var(--panel2);color:var(--head);padding:9px 12px;border-bottom:1px solid var(--line);font-weight:700;white-space:nowrap}
.dv-table td{padding:8px 12px;border-top:1px solid var(--line);vertical-align:top;color:var(--text)}
.dv-table td:first-child{font-weight:650;color:var(--strong);white-space:nowrap}
.dv-table tbody tr:nth-child(even){background:var(--zebra)}
.dv-table tbody tr:hover{background:var(--hover)}

/* definition boxes */
.defbox{margin:13px 0;border-radius:12px;padding:13px 16px;border:1px solid var(--line);border-left-width:3px}
.def-label{display:inline-block;font-size:10px;font-weight:800;letter-spacing:1px;text-transform:uppercase;padding:3px 9px;border-radius:8px;margin-bottom:8px;color:#fff}
.def-body{font-size:14px;line-height:1.6;color:var(--text)}
.defbox.def-def{background:rgba(67,97,238,.07);border-color:rgba(67,97,238,.35);border-left-color:#4361ee}
.def-def .def-label{background:#4361ee}
.defbox.def-key{background:rgba(183,121,31,.1);border-color:rgba(183,121,31,.32);border-left-color:#b7791f}
.def-key .def-label{background:#b7791f}
.defbox.def-rule{background:rgba(13,148,136,.08);border-color:rgba(13,148,136,.32);border-left-color:#0d9488}
.def-rule .def-label{background:#0d9488}
.defbox.def-ex{background:rgba(124,92,208,.09);border-color:rgba(124,92,208,.34);border-left-color:#7c5cd0}
.def-ex .def-label{background:#7c5cd0}
.defbox.def-formula{background:var(--panel2);border-left-color:#64748b}
.def-formula .def-label{background:#64748b}
.def-formula .def-body{font-family:ui-monospace,Menlo,monospace;font-size:13.5px}
.defbox.def-summary{background:linear-gradient(120deg,rgba(67,97,238,.1),rgba(13,148,136,.07));border-color:var(--accent);border-left-color:var(--accent)}
.def-summary .def-label{background:var(--accent)}

/* code blocks */
.code-block{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:13px 15px;overflow-x:auto;font-size:12.5px;line-height:1.5;margin:12px 0;font-family:ui-monospace,Menlo,monospace}

/* datatypes demo buttons */
.dt-prompt{font-size:15px;margin-bottom:10px;color:var(--text)}
.dt-count{color:var(--muted);font-size:12px}
button.btn.correct{background:var(--accent2);border-color:var(--accent2);color:#fff}
button.btn.wrong{background:var(--pink);border-color:var(--pink);color:#fff}

/* famous-viz gallery */
.fv-stage{display:flex;flex-direction:column;gap:8px}
.fv-img{width:100%;max-height:360px;object-fit:contain;background:#fbf7ee;border-radius:10px;border:1px solid var(--line)}
.fv-cap{font-size:13px;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:11px 13px;line-height:1.55}
.fv-why{margin:9px 0 0;font-size:12px;line-height:1.45;color:var(--muted);border-left:3px solid color-mix(in srgb,var(--accent) 45%, transparent);padding:8px 10px;background:color-mix(in srgb,var(--accent2) 10%, transparent);border-radius:0 8px 8px 0}
.fv-why span{display:inline;font-weight:700;color:var(--strong);margin-right:6px}
.fv-thumbs{display:flex;gap:7px;flex-wrap:wrap;margin-top:8px}
.fv-thumb{width:68px;height:48px;object-fit:cover;border-radius:7px;border:2px solid transparent;cursor:pointer;opacity:.55;background:#fbf7ee;transition:.15s}
.fv-thumb:hover{opacity:1}
.fv-thumb.active{border-color:var(--accent);opacity:1}
.fv-thumb:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.fv-thumb-img{width:100%;height:100%;object-fit:cover;border-radius:5px;display:block}
.section-figure-gallery{margin:18px 0 0}
.section-figure-gallery h3{margin:0 0 8px;font-size:.95rem;color:var(--head)}
.section-figure-gallery .fv-stage{max-width:100%}
.section-figure-gallery .fv-cap{min-height:38px}
.section-figure-gallery .fv-cap:empty{display:none}

/* figure (inline annotated image) */
.fig{margin:14px 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}
.fig-img{display:block;width:100%;max-height:440px;object-fit:contain;background:#fbf7ee}
.fig-cap{font-size:12.5px;color:var(--muted);padding:10px 13px;line-height:1.55}
.fig-credit{color:var(--accent2);font-style:italic}

/* visual variables grid */
.vv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(122px,1fr));gap:8px}
.vv-card{background:var(--c-panel);border:1px solid var(--line);border-radius:9px;padding:7px 7px 3px}
.vv-h{font-size:11px;color:var(--head);margin-bottom:2px;display:flex;justify-content:space-between;align-items:center;gap:4px}
.vv-tag{font-size:8px;padding:1px 5px;border-radius:8px;font-weight:700;letter-spacing:.5px}
.vv-tag.q{background:rgba(67,97,238,.18);color:var(--accent)}
.vv-tag.c{background:rgba(183,121,31,.2);color:var(--gold)}

/* colour-scale families */
.cs-row{margin:11px 0}
.cs-name{font-weight:700;color:var(--head);font-size:13px;margin-bottom:4px}
.cs-use{font-size:12px;color:var(--muted);margin-top:4px;line-height:1.5}

/* flow diagrams */
.flow{display:flex;flex-wrap:wrap;align-items:stretch;gap:7px;margin:13px 0}
.flow-col{flex-direction:column;align-items:flex-start}
.flow-step{background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:9px 14px;display:flex;flex-direction:column;min-width:98px;box-shadow:var(--shadow-sm)}
.flow-step b{color:var(--strong);font-size:13.5px}
.flow-step span{color:var(--muted);font-size:11px;margin-top:2px}
.flow-arrow{display:flex;align-items:center;color:var(--accent);font-weight:800;font-size:18px}
.flow-col .flow-arrow{padding-left:36px;font-size:15px}

/* chart-type reference zoo */
.zoo-group{margin:10px 0 5px;font-size:11.5px;font-weight:800;letter-spacing:.6px;color:var(--accent);text-transform:uppercase}
.zoo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-bottom:10px}
.zoo-card{background:var(--c-panel);border:1px solid var(--line);border-radius:10px;padding:9px}
.zoo-name{font-size:12.5px;font-weight:700;color:var(--ink)}
.zoo-use{font-size:10.5px;color:var(--muted);margin-top:1px;line-height:1.35}

/* svg text default */
svg text{font-family:inherit}

/* ---- embedded visual learning system ---- */
.visual-shell{margin:18px 0 4px;border:1px solid var(--line);border-radius:14px;background:var(--c-surface);overflow:hidden;box-shadow:var(--shadow-sm)}
.visual-head{display:flex;align-items:center;gap:10px;padding:9px 13px;border-bottom:1px solid var(--line);background:var(--panel2)}
.visual-head span{font-size:9px;letter-spacing:1px;font-weight:800;color:var(--accent)}
.visual-head b{font-size:12px;color:var(--strong)}
.visual-stage{padding:18px;min-height:150px;color:var(--text);position:relative;width:100%;box-sizing:border-box;max-width:100%;overflow:hidden}
.visual-stage button{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:7px 10px;cursor:pointer;transition:.16s}
.visual-stage button:hover,.visual-stage button.active,.visual-stage button[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft);color:var(--strong)}
.visual-stage small{display:block;color:var(--muted);font-size:10.5px;line-height:1.35}
.d3-timeline-chart{width:100%}
.d3-timeline-chart svg{display:block;max-width:100%}
.visual-detail{min-height:38px;margin-top:13px;padding:9px 12px;border-left:3px solid var(--accent);background:var(--panel);color:var(--text);font-size:12px;border-radius:0 8px 8px 0}
.visual-index{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin:0 0 22px}
.visual-index a{display:flex;align-items:center;gap:8px;padding:9px 12px;background:var(--panel);border:1px solid var(--line);border-radius:10px;font-size:12px;color:var(--text)}
.visual-index a:hover{border-color:var(--accent);color:var(--accent)}
.visual-lab-section{scroll-margin-top:18px;margin:0 0 26px}
.visual-lab-section>h2{display:flex;align-items:center;gap:9px;margin-bottom:8px}

/* W7 timeline visuals */
.task-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:22px}
.task-strip span{padding:9px 11px;background:var(--panel);border-left:3px solid var(--accent);border-radius:8px}.task-strip b{font-size:12px}.task-strip small{margin-top:2px}
.timeline-main{height:clamp(150px,28vw,180px);position:relative;margin:6px clamp(4px,2vw,24px) 0}
.time-axis{position:absolute;left:0;right:0;top:50%;border-top:2px solid var(--c-axis)}
.time-axis i{position:absolute;transform:translateX(-50%);top:8px;font-size:10px;color:var(--muted);font-style:normal}.time-axis i::before{content:"";position:absolute;left:50%;top:-11px;height:7px;border-left:1px solid var(--c-axis)}
.event-point{position:absolute;top:50%;transform:translate(-50%,-50%);padding:0!important;border:0!important;background:transparent!important;text-align:center}.event-point>span{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--accent);color:var(--on-accent);font-weight:800}.event-point small{white-space:nowrap;margin-top:5px}
.event-interval{position:absolute;top:8px;height:27px;padding:3px 8px!important;background:color-mix(in srgb,var(--accent2) 22%,var(--panel))!important;border-color:var(--accent2)!important;font-size:10px;white-space:nowrap;overflow:hidden}.event-interval.lower{top:78%;background:color-mix(in srgb,var(--gold) 22%,var(--panel))!important;border-color:var(--gold)!important}
.format-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}.format-grid>div,.map-type-grid>div,.encoding-grid>div,.contrast-grid>div{padding:11px;background:var(--panel);border:1px solid var(--line);border-radius:10px;text-align:center}.format-grid b{font-size:11px}.mini-horizontal,.mini-points{height:52px;margin:8px;position:relative;border-top:2px solid var(--c-axis);top:23px}.mini-horizontal i,.mini-points i{position:absolute;top:-6px;width:11px;height:11px;border-radius:50%;background:var(--accent)}.mini-horizontal i:nth-child(1),.mini-points i:nth-child(1){left:5%}.mini-horizontal i:nth-child(2),.mini-points i:nth-child(2){left:45%}.mini-horizontal i:nth-child(3),.mini-points i:nth-child(3){left:87%}.mini-vertical{height:62px;width:2px;background:var(--c-axis);position:relative;margin:8px auto}.mini-vertical i{position:absolute;left:-5px;width:11px;height:11px;border-radius:50%;background:var(--accent)}.mini-vertical i:nth-child(1){top:0}.mini-vertical i:nth-child(2){top:25px}.mini-vertical i:nth-child(3){top:50px}.mini-intervals{height:62px;margin:8px;display:flex;flex-direction:column;gap:6px;justify-content:center}.mini-intervals i{height:8px;background:var(--accent);border-radius:5px}.mini-intervals i:nth-child(2){width:55%;margin-left:28%}.mini-intervals i:nth-child(3){width:38%;margin-left:55%}
.spacing-compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}.spacing-compare>div{padding:12px;background:var(--panel);border-radius:10px}.spacing-line{height:52px;border-top:2px solid var(--c-axis);margin:25px 8px 0;position:relative}.spacing-line i{position:absolute;top:-22px;transform:translateX(-50%);font-size:10px;font-style:normal}.spacing-line i::after{content:"";display:block;height:12px;border-left:2px solid var(--accent);margin:4px auto}.spacing-line.honest i:nth-child(1){left:0}.spacing-line.honest i:nth-child(2){left:33%}.spacing-line.honest i:nth-child(3){left:66%}.spacing-line.honest i:nth-child(4){left:100%}.spacing-line.warped i:nth-child(1){left:0}.spacing-line.warped i:nth-child(2){left:10%}.spacing-line.warped i:nth-child(3){left:76%}.spacing-line.warped i:nth-child(4){left:100%}.encoding-key{display:flex;flex-wrap:wrap;gap:14px;margin-top:12px;font-size:11px}.encoding-key span{display:flex;align-items:center;gap:5px}.swatch{width:10px;height:10px;border-radius:3px}.category-a{background:var(--accent)}.category-b{background:var(--accent2)}
.matrix{height:clamp(200px,40vw,230px);position:relative;margin:6px clamp(10px,2.5vw,34px) 22px;border-left:2px solid var(--c-axis);border-bottom:2px solid var(--c-axis);background-image:linear-gradient(var(--c-grid) 1px,transparent 1px),linear-gradient(90deg,var(--c-grid) 1px,transparent 1px);background-size:25% 25%}.matrix button{position:absolute;transform:translate(-50%,-50%);font-size:11px}.matrix .mx-y{position:absolute;left:-35px;top:0;font-size:10px;color:var(--muted);writing-mode:vertical-rl;transform:rotate(180deg)}.matrix .mx-x{position:absolute;right:0;bottom:-24px;font-size:10px;color:var(--muted)}
.vflow{display:flex;align-items:stretch;gap:6px;flex-wrap:wrap}.vf-step{flex:1;min-width:0;display:flex;flex-direction:column;align-items:flex-start;text-align:left}.vf-step b{font-size:11px}.vf-arrow{display:grid;place-items:center;color:var(--accent);font-weight:800}.architecture-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:14px}.architecture-grid>div{padding:13px;background:var(--panel);border-radius:10px}.stack-flow{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:12px 0}.stack-flow span{padding:6px 8px;border:1px solid var(--line);border-radius:7px;background:var(--panel2);font-size:10px}.stack-flow i{color:var(--accent);font-style:normal}.interaction-controls,.mode-tabs,.accuracy-buttons{display:flex;gap:7px;flex-wrap:wrap}.event-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.event-row button{display:flex;align-items:center;gap:6px}.event-row .dot{width:10px;height:10px;border-radius:50%}

/* W8 and W9 map visuals */
.gis-system{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;align-items:center}
.gis-system .big-arrow{justify-self:center}
.gis-core{display:grid;grid-template-columns:1fr 1fr;gap:5px;padding:14px;border:2px solid var(--accent);border-radius:16px;text-align:center;aspect-ratio:1.5;align-content:center;background:var(--accent-soft)}.gis-core b{grid-column:1/-1}.gis-core span{font-size:10px}
.geo-data,.map-output{padding:12px;background:var(--panel);border-radius:10px;text-align:center}.big-arrow{font-size:24px;color:var(--accent)}
.schematic-map{height:105px;position:relative;overflow:hidden;border:1px solid var(--line);background:var(--panel2);border-radius:8px;margin:8px 0}.schematic-map .land{position:absolute;background:color-mix(in srgb,var(--accent2) 25%,var(--panel));border:1px solid color-mix(in srgb,var(--accent2) 55%,var(--line))}.land-a{left:10%;top:18%;width:37%;height:45%;clip-path:polygon(10% 0,100% 15%,83% 100%,0 75%)}.land-b{right:7%;top:8%;width:39%;height:38%;clip-path:polygon(20% 0,100% 18%,76% 100%,0 78%)}.land-c{right:17%;bottom:8%;width:30%;height:31%;clip-path:polygon(5% 20%,87% 0,100% 90%,18% 100%)}.river{position:absolute;left:49%;top:0;height:110%;border-left:4px solid color-mix(in srgb,var(--accent) 55%,var(--panel));transform:rotate(12deg)}.road{position:absolute;left:5%;right:5%;top:60%;border-top:2px dashed var(--gold);transform:rotate(-8deg)}.city{position:absolute;width:8px;height:8px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 3px color-mix(in srgb,var(--pink) 20%,transparent)}.city.c1{left:25%;top:35%}.city.c2{right:22%;bottom:24%}.schematic-map.thematic .road,.schematic-map.thematic .river{opacity:.18}.schematic-map.thematic .land-b{background:color-mix(in srgb,var(--accent) 62%,var(--panel))}.schematic-map.thematic .land-a{background:color-mix(in srgb,var(--accent) 28%,var(--panel))}.schematic-map.thematic .land-c{background:color-mix(in srgb,var(--accent) 45%,var(--panel))}
.map-type-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.time-map-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:14px}.time-map-row>span{display:flex;align-items:center;gap:4px;font-size:10px}.time-map{width:40px;height:30px;background:var(--panel2);border:1px solid var(--line);border-radius:4px;position:relative}.time-map::after{content:"";position:absolute;width:12px;height:12px;border-radius:50%;background:var(--accent);left:8px;top:9px}.time-map.t2::after{width:17px;height:17px}.time-map.t3::after{width:21px;height:21px}.time-map.animated::after{transform:translateX(13px)}
.anatomy-layout{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1.3fr));gap:16px}.anatomy-map{height:clamp(160px,30vw,220px);border:6px solid var(--c-axis);background:var(--panel2);position:relative;display:grid;place-items:center}.focus-shape{width:48%;height:48%;display:grid;place-items:center;text-align:center;background:var(--accent);color:var(--on-accent);clip-path:polygon(10% 8%,90% 0,100% 74%,61% 100%,0 77%);font-weight:800}.ground-label{position:absolute;left:10px;top:8px;font-size:10px;color:var(--muted)}.frame-label{position:absolute;right:4px;bottom:-24px;font-size:10px;color:var(--muted)}.anatomy-key{display:flex;flex-direction:column;gap:9px;justify-content:center}.anatomy-key span{display:grid;grid-template-columns:16px auto;gap:0 8px;font-size:11px}.anatomy-key i{grid-row:1/3;width:16px;height:16px}.key-figure{background:var(--accent)}.key-ground{background:var(--panel2);border:1px solid var(--line)}.key-frame{border:4px solid var(--c-axis)}
.annotated-map{height:clamp(180px,40vw,285px);position:relative;padding:clamp(16px,3vw,33px) clamp(18px,8vw,80px) clamp(26px,6vw,45px) clamp(12px,2.5vw,18px);background:var(--panel);border:1px solid var(--line)}.annotated-map .schematic-map{height:100%;margin:0}.map-title-label{position:absolute;left:18px;top:8px;font-weight:700;color:var(--strong)}.legend-box{position:absolute;right:10px;top:48px;padding:7px;background:var(--panel2);border:1px solid var(--line);font-size:9px}.north-arrow{position:absolute;right:12px;top:9px;text-align:center;font-size:10px}.scale-bar{position:absolute;bottom:12px;left:24px;font-size:9px}.cm-scale,.scale-bar{padding-bottom:3px;border-bottom:3px solid var(--strong)}.place-label{position:absolute;font-size:9px;background:var(--panel);padding:1px 4px}.place-label.p1{left:27%;top:44%}.place-label.p2{right:28%;bottom:29%}.element-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin-top:9px}.element-strip span{font-size:9px;padding:5px;background:var(--panel2);text-align:center}
.range-label{display:flex;align-items:center;gap:10px;font-size:11px}.range-label input{flex:1}.hierarchy-map{height:clamp(160px,35vw,205px);position:relative;margin-top:12px}.hierarchy-map>.schematic-map{height:100%;opacity:.45}.theme-layer{position:absolute;left:32%;top:35%;padding:14px;background:var(--accent);color:var(--on-accent);font-weight:800;border-radius:50%;opacity:var(--focus-opacity);transform:scale(var(--focus-scale))}.support-layer{position:absolute;right:12%;bottom:15%;font-size:10px;color:var(--muted)}
.variable-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.variable-grid>div{padding:9px;background:var(--panel);border-radius:8px}.variable-grid b{font-size:10px}.variable-grid span{height:45px;display:flex;align-items:center;justify-content:center;gap:9px}.variable-grid i{display:block}.sizes i{border-radius:50%;background:var(--accent)}.sizes i:nth-child(1){width:8px;height:8px}.sizes i:nth-child(2){width:17px;height:17px}.sizes i:nth-child(3){width:28px;height:28px}.values i{width:28px;height:28px;background:var(--accent)}.values i:nth-child(1){opacity:.2}.values i:nth-child(2){opacity:.55}.textures i{width:28px;height:28px;background:repeating-linear-gradient(45deg,var(--accent) 0 2px,transparent 2px 6px)}.textures i:nth-child(2){background-size:5px 5px}.textures i:nth-child(3){background-size:2px 2px}.hues i{width:24px;height:24px;border-radius:4px}.hues i:nth-child(1){background:var(--accent)}.hues i:nth-child(2){background:var(--accent2)}.hues i:nth-child(3){background:var(--gold)}.orient i{width:3px;height:30px;background:var(--accent)}.orient i:nth-child(1){transform:rotate(0)}.orient i:nth-child(2){transform:rotate(45deg)}.orient i:nth-child(3){transform:rotate(90deg)}.shapes i{width:24px;height:24px;background:var(--accent)}.shapes i:nth-child(1){border-radius:50%}.shapes i:nth-child(2){clip-path:polygon(50% 0,100% 100%,0 100%)}.shapes i:nth-child(3){transform:rotate(45deg) scale(.7)}
.encoding-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.encoding-grid>div{display:flex;flex-direction:column;justify-content:space-between}.qual-symbols,.prop-symbols,.choro-ramp{min-height:80px;display:flex;align-items:center;justify-content:center;gap:8px;margin:8px 0}.qual-symbols i{display:grid;place-items:center;width:35px;height:35px;border-radius:50%;font-style:normal;color:var(--on-accent)}.qual-symbols i:nth-child(1){background:var(--accent)}.qual-symbols i:nth-child(2){background:var(--accent2);border-radius:4px}.qual-symbols i:nth-child(3){background:var(--gold);clip-path:polygon(50% 0,100% 100%,0 100%)}.prop-symbols i{display:grid;place-items:center;border-radius:50%;background:color-mix(in srgb,var(--accent) 25%,var(--panel));border:2px solid var(--accent);font-style:normal;font-size:8px}.prop-symbols i:nth-child(1){width:24px;height:24px}.prop-symbols i:nth-child(2){width:42px;height:42px}.prop-symbols i:nth-child(3){width:66px;height:66px}.choro-ramp{gap:2px}.choro-ramp i{height:58px;flex:1;display:grid;place-items:center;font-size:8px;font-style:normal;background:var(--accent);color:var(--on-accent)}.choro-ramp i:nth-child(1){opacity:.2}.choro-ramp i:nth-child(2){opacity:.4}.choro-ramp i:nth-child(3){opacity:.65}
.cosmetic-layout{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1.4fr));gap:12px}
.cosmetic-map{height:clamp(190px,35vw,240px);position:relative;padding:clamp(14px,3.5vw,30px) clamp(18px,7vw,76px) clamp(24px,6vw,50px) 12px;background:var(--panel);border:4px solid var(--c-axis)}.cosmetic-map .schematic-map{height:100%;margin:0}.cm-title{position:absolute;left:12px;top:6px;font-weight:700;font-size:11px}.cm-north{position:absolute;right:18px;top:8px}.cm-legend{position:absolute;right:8px;top:55px;font-size:9px}.cm-scale{position:absolute;left:20px;bottom:20px;font-size:8px}.cm-meta{position:absolute;right:7px;bottom:6px;font-size:7px;text-align:right}.checklist{display:grid;grid-template-columns:1fr 1fr;gap:6px;align-content:center}.checklist button{font-size:9px;text-align:left}.checklist button[aria-pressed="false"]{opacity:.45;text-decoration:line-through}
.contrast-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.weak-map,.strong-map{height:170px;position:relative}.weak-map .schematic-map,.strong-map .schematic-map{height:100%}.weak-map>span:not(.schematic-map){position:absolute;font-weight:800;color:var(--pink)}.weak-map>span:nth-of-type(1){left:8%;top:22%}.weak-map>span:nth-of-type(2){right:12%;top:47%}.weak-map>span:nth-of-type(3){left:25%;bottom:12%}.primary-mark{position:absolute;left:30%;top:34%;padding:12px;background:var(--accent);color:var(--on-accent);font-weight:800;border-radius:50%}.secondary-mark{position:absolute;right:13%;bottom:15%;color:var(--muted);font-size:9px}
.mode-stage{height:clamp(150px,30vw,190px);position:relative;margin-top:10px}.mode-stage .schematic-map{height:100%}.mode-dot{position:absolute;left:28%;top:38%;width:30px;height:30px;border-radius:50%;background:var(--accent);transition:transform .5s}.mode-stage.dynamic .mode-dot{transform:translate(clamp(8px,48%,150px),40px) scale(1.35)}.mode-stage.filtered .mode-dot{background:var(--accent2);transform:translate(clamp(4px,28%,90px),5px)}.mode-action{margin-top:9px}.json-tree{display:flex;flex-direction:column;align-items:flex-start;background:var(--panel2);padding:12px;border-radius:10px;font-family:ui-monospace,Menlo,monospace;font-size:11px}.json-tree button{border:0;background:transparent;padding:4px 6px;text-align:left}.json-tree .indent{margin-left:18px}.json-tree .indent2{margin-left:38px}.json-tree .indent3{margin-left:60px}
.projection-flow{display:grid;grid-template-columns:minmax(110px,120px) minmax(130px,150px) minmax(0,1fr);gap:14px;align-items:center}
.globe{width:112px;height:112px;border:2px solid var(--accent);border-radius:50%;position:relative;overflow:hidden;background:radial-gradient(circle at 35% 30%,var(--accent-soft),var(--panel2))}
.globe::before,.globe::after,.globe i{content:"";position:absolute;border:1px solid color-mix(in srgb,var(--accent) 45%,transparent);border-radius:50%}
.globe::before{inset:18px -18px}
.globe::after{inset:-18px 20px}
.globe i:nth-child(1){left:0;right:0;top:33%;height:1px}
.globe i:nth-child(2){left:0;right:0;top:66%;height:1px}
.globe i:nth-child(3){top:0;bottom:0;left:50%;width:1px}
.projection-arrow{text-align:center}
.projection-arrow b{font-size:10px}
.projection-arrow i{display:block;font-size:28px;color:var(--accent);font-style:normal}
.flat-map{text-align:center}
.world-map svg,.workflow-map svg{display:block;width:100%;height:auto}
.world-map .country,.workflow-map .country{fill:var(--panel2);stroke:var(--c-axis);stroke-width:.35}
.world-map .malaysia,.workflow-map .malaysia{fill:var(--accent);stroke:var(--strong);stroke-width:1}
.map-fallback{padding:14px;background:var(--panel2);color:var(--muted);font-size:11px}
.workflow-map{width:100%;max-width:100%;margin:8px auto 0;aspect-ratio:2.8/1;overflow:hidden}
.workflow-layout{
  display:flex;
  flex-direction:column;
  gap:12px;
  width:min(var(--content-max-width, 100%), 100%);
  margin-left:auto;
  margin-right:auto;
}
.workflow-flow-root{
  width:100%;
  max-width:100%;
  position:relative;
  margin:0;
  padding:0;
  box-sizing:border-box;
  isolation:isolate;
  aspect-ratio:2.6/1;
  overflow:hidden;
}
.workflow-flow{
  width:100%;
  height:100%;
  position:relative;
  display:block;
  max-width:100%;
  max-height:100%;
  min-height:0;
  overflow:hidden;
  box-sizing:border-box;
}
.workflow-flow-svg{width:100%;height:100%;display:block}
.workflow-flow-node{transition:fill .2s,opacity .2s}
.workflow-flow-node:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 70%, white);outline-offset:2px}
.workflow-node-card{fill:var(--panel2);stroke:var(--line);stroke-width:1.2}
.workflow-node-title{fill:var(--strong);font-size:11px;font-weight:700;text-anchor:middle}
.workflow-node-sub{fill:var(--muted);font-size:9px;text-anchor:middle}
.workflow-flow-link{fill:none;stroke:var(--accent);stroke-width:3;opacity:.75;shape-rendering:geometricPrecision;vector-effect:non-scaling-stroke}
.workflow-flow-link marker{fill:var(--accent)}
.workflow-flow-node .workflow-node-card,.workflow-flow-node .workflow-node-title,.workflow-flow-node .workflow-node-sub{cursor:pointer}
.workflow-flow-node .workflow-node-card{transition:all .2s ease}
.workflow-flow-node:hover .workflow-node-card{fill:color-mix(in srgb,var(--accent) 16%, var(--panel2))}
.workflow-flow-node[aria-pressed="true"] .workflow-node-card{fill:var(--accent-soft);stroke:var(--accent);stroke-width:1.4}
.workflow-flow-node[aria-pressed="true"] .workflow-node-title{fill:var(--accent)}


/* W10 evaluation visuals */
.cycle-flow{display:flex;align-items:stretch;justify-content:center;gap:5px;position:relative;padding-bottom:32px}.cycle-flow span{flex:1;padding:9px;background:var(--panel);border-top:3px solid var(--accent);text-align:center;border-radius:7px}.cycle-flow i{display:grid;place-items:center;color:var(--accent);font-style:normal}.cycle-flow .cycle-back{position:absolute;right:3%;bottom:0;width:94%;height:25px;border-bottom:2px solid var(--accent);font-size:22px;display:block;text-align:left}
.nested-stack{display:flex;flex-direction:column;align-items:center;gap:5px}.nested-stack button{width:calc(100% - var(--depth)*12%);display:flex;justify-content:space-between;align-items:center;text-align:left;border-left:5px solid color-mix(in srgb,var(--accent) calc(100% - var(--depth)*18%),var(--accent2))}.nested-stack small{display:inline}.threat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.threat-grid>div{display:flex;flex-direction:column;padding:10px;background:var(--panel);border-top:3px solid var(--accent);border-radius:8px}.threat-grid b{font-size:10px}.threat-grid span{font-size:11px;margin-top:7px}.threat-grid i{color:var(--accent);font-style:normal}.threat-grid small{margin-top:auto}
.criteria-venn{display:flex;justify-content:center;align-items:center;min-height:230px;position:relative}.criterion{width:175px;height:175px;border-radius:50%;display:flex;flex-direction:column;align-items:center;padding-top:38px;background:color-mix(in srgb,var(--accent) 24%,transparent);border:2px solid var(--accent);text-align:center}.criterion.engaging{margin-left:-45px;background:color-mix(in srgb,var(--accent2) 24%,transparent);border-color:var(--accent2)}.criterion.clear{margin-left:-45px;background:color-mix(in srgb,var(--gold) 24%,transparent);border-color:var(--gold)}.quality-center{position:absolute;left:50%;top:53%;transform:translate(-50%,-50%);text-align:center;font-size:10px;font-weight:800;color:var(--strong)}.criteria-cases{display:flex;justify-content:center;gap:10px}.criteria-cases span{padding:7px 10px;background:var(--panel);font-size:9px;text-align:center}
.measure-axis{padding:16px 30px 48px;position:relative}.measure-axis>div{height:8px;background:linear-gradient(90deg,var(--accent2),var(--gold),var(--pink));position:relative;border-radius:8px;margin-top:22px}.measure-axis .easy,.measure-axis .hard{position:absolute;top:0;font-size:9px;color:var(--muted)}.measure-axis .easy{left:30px}.measure-axis .hard{right:30px}.measure-axis i{position:absolute;top:-8px;transform:translateX(-50%);width:64px;text-align:center;font-style:normal}.measure-axis i::before{content:"";display:block;width:18px;height:18px;border-radius:50%;background:var(--panel);border:4px solid var(--accent);margin:auto}.measure-axis i b{display:block;font-size:9px}.equation-cards{display:flex;align-items:center;justify-content:center;gap:12px}.equation-cards span{padding:10px;background:var(--panel);border-radius:8px;font-size:10px}.equation-cards i{font-style:normal;font-size:22px;color:var(--pink)}
.test-simulator>label{display:flex;align-items:center;gap:10px;font-size:10px}.test-simulator>label input{flex:1}.test-quadrant{height:235px;position:relative;margin-top:12px;border-left:2px solid var(--c-axis);border-bottom:2px solid var(--c-axis);background:linear-gradient(90deg,transparent 49.8%,var(--c-grid) 50%,transparent 50.2%),linear-gradient(transparent 49.8%,var(--c-grid) 50%,transparent 50.2%)}.test-quadrant span{position:absolute;font-size:9px;color:var(--muted)}.q-fast-good{left:8px;top:8px}.q-slow-good{right:8px;top:8px;text-align:right}.q-fast-bad{left:8px;bottom:8px}.q-slow-bad{right:8px;bottom:8px;text-align:right}.test-point{position:absolute;width:18px;height:18px;border-radius:50%;background:var(--accent);border:4px solid var(--panel);box-shadow:0 0 0 2px var(--accent);transform:translate(-50%,-50%);transition:.2s}.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.case-grid>div{padding:13px;background:var(--panel);border-top:4px solid var(--accent);border-radius:9px}.case-grid>div+div{border-top-color:var(--accent2)}.case-flow{display:flex;flex-direction:column;gap:3px;margin:10px 0}.case-flow span{padding:5px;background:var(--panel2);border-radius:5px;font-size:10px}.case-flow i{text-align:center;color:var(--accent);font-style:normal;transform:rotate(90deg)}

@media (prefers-reduced-motion:reduce){.visual-stage *{transition:none!important}}

/* exam countdown chip in sidebar */
.exam-chip{display:block;width:100%;text-align:left;margin:0 0 14px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;border-radius:12px;padding:10px 13px;cursor:pointer;box-shadow:var(--shadow-sm);transition:transform .12s}
.exam-chip:hover{transform:translateY(-1px);filter:brightness(1.05)}
.exam-chip .ec-top{font-size:10px;font-weight:800;letter-spacing:.5px;opacity:.9;text-transform:uppercase}
.exam-chip .ec-time{font-size:16px;font-weight:800;margin-top:2px;font-variant-numeric:tabular-nums}
.exam-chip .ec-loc{font-size:10.5px;opacity:.92;margin-top:2px}

/* hype welcome overlay */
.hype-overlay{position:fixed;inset:0;z-index:1000;display:grid;place-items:center;padding:20px;background:rgba(12,20,36,.55);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);animation:hypeFade .4s ease}
.hype-overlay.closing{animation:hypeOut .4s ease forwards}
.hype-flash{position:fixed;inset:0;background:#fff;pointer-events:none;animation:hypeFlash .75s ease-out forwards}
.hype-card{position:relative;max-width:470px;width:100%;background:linear-gradient(160deg,#16304a,#0b1a29);color:#fff;border:1px solid rgba(255,255,255,.12);border-radius:22px;padding:32px 28px;text-align:center;box-shadow:0 30px 90px rgba(0,0,0,.55);animation:hypePop .5s cubic-bezier(.2,.85,.25,1)}
.hype-kicker{font-size:12px;font-weight:800;letter-spacing:2px;color:#ffd166}
.hype-title{font-size:46px;font-weight:900;letter-spacing:-1px;margin:6px 0 2px;line-height:1;background:linear-gradient(90deg,#fff,#9fd6ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hype-sub{color:#cfe0ee;font-size:15px}
.hype-meta{margin:13px 0 2px;font-size:14.5px;color:#fff;font-weight:600}
.hype-countdown{display:flex;justify-content:center;gap:8px;margin:18px 0 6px}
.cd-box{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:10px 6px;min-width:64px}
.cd-num{font-size:30px;font-weight:900;font-variant-numeric:tabular-nums;line-height:1;color:#fff}
.cd-lbl{font-size:10px;letter-spacing:1px;color:#9fb6cc;margin-top:6px;text-transform:uppercase}
.hype-line{color:#cdd9e6;font-size:14px;line-height:1.65;margin:12px 6px 22px}
.hype-go{background:linear-gradient(135deg,#ff7b00,#ff006e);color:#fff;border:none;font-size:21px;font-weight:900;letter-spacing:.5px;padding:16px 34px;border-radius:14px;cursor:pointer;box-shadow:0 12px 34px rgba(255,0,110,.45);animation:hypePulse 1.5s ease-in-out infinite}
.hype-go:hover{filter:brightness(1.08);transform:scale(1.03)}
.hype-skip{display:block;margin:14px auto 0;background:none;border:none;color:#8fb0c6;font-size:12px;cursor:pointer}
.hype-skip:hover{color:#fff}
@keyframes hypeFade{from{opacity:0}to{opacity:1}}
@keyframes hypeOut{to{opacity:0;visibility:hidden}}
@keyframes hypeFlash{0%{opacity:.9}100%{opacity:0}}
@keyframes hypePop{from{opacity:0;transform:scale(.9) translateY(12px)}to{opacity:1;transform:none}}
@keyframes hypePulse{0%,100%{transform:scale(1)}50%{transform:scale(1.045)}}

@media (max-width:760px){
  .sidebar{position:static;width:auto;margin:10px 10px 0;bottom:auto;border-radius:14px;display:flex;flex-direction:column}
  #nav{flex-direction:row;flex-wrap:wrap}
  main{margin-left:0;padding:22px 18px 60px}
  .hype-title{font-size:38px}
  .cd-box{min-width:54px}
  .exam-banner{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:0}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .quiz-card .quiz-meta{gap:10px;align-items:flex-start}
  .format-grid,.threat-grid{grid-template-columns:repeat(2,1fr)}
  .vflow{flex-wrap:wrap}.vf-step{min-width:120px}.vf-arrow{display:none}
  .gis-system{grid-template-columns:1fr 1fr}.gis-system .big-arrow{display:none}
  .projection-flow{grid-template-columns:100px 110px 1fr}.globe{width:92px;height:92px}
  .anatomy-layout,.cosmetic-layout{grid-template-columns:1fr}
  .mode-stage.dynamic .mode-dot{transform:translate(0px,40px) scale(1.24)}
  .mode-stage.filtered .mode-dot{transform:translate(0,5px)}
  .criterion{width:145px;height:145px}.criteria-venn{min-height:195px}
}
@media (max-width:430px){
  .exam-banner{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .flashcard{width:100%;height:290px}
  .fc-text{font-size:21px}
  .visual-stage{padding:13px}
  .task-strip,.spacing-compare,.architecture-grid,.map-type-grid,.anatomy-layout,.encoding-grid,.cosmetic-layout,.contrast-grid,.case-grid{grid-template-columns:1fr}
  .format-grid,.variable-grid,.threat-grid{grid-template-columns:1fr 1fr}
  .projection-flow{grid-template-columns:1fr;text-align:center}.globe{margin:auto}.projection-arrow i{transform:rotate(90deg)}
  .element-strip{grid-template-columns:1fr 1fr}
  .criteria-venn{transform:scale(.78);margin:-20px -60px}.criteria-cases{flex-direction:column}
  .cycle-flow{flex-wrap:wrap}.cycle-flow span{min-width:115px}.cycle-flow i:not(.cycle-back){display:none}
  .nested-stack button{width:100%}
}
@media print{
  .sidebar{display:none}
  body{background:#fff;color:#000}
  .card,.cheat,.lec-section{break-inside:avoid;box-shadow:none;border:1px solid #ccc;background:#fff;color:#000}
  .cheat h3{color:#000}
  .btn,.theme-btn{display:none}
}

/* ========================================================================== */
/* Premium learning product shell                                             */
/* ========================================================================== */
:root{
  --bg:#f4f6f3;--bg2:#eaf0ef;--panel:#ffffff;--panel2:#eef3f4;
  --ink:#102131;--text:#344657;--muted:#526274;--line:#d8e1e5;
  --strong:#07131f;--head:#173c5d;--accent:#3659e3;--accent-soft:#e8edff;
  --accent2:#0b8f83;--gold:#8a5a12;--pink:#bf2f61;--on-accent:#fff;
  --hover:rgba(54,89,227,.075);--zebra:rgba(15,41,64,.025);
  --c-surface:#f7fafb;--c-panel:#eef3f6;--c-axis:#617486;--c-ink:#253c51;--c-grid:#dfe8ed;--c-stripe:#dce7ed;
  --radius:14px;--sb:264px;
  --shadow:0 20px 55px rgba(26,49,68,.09);--shadow-sm:0 6px 20px rgba(26,49,68,.065);
}
body.theme-dark{
  --bg:#07121d;--bg2:#0b1a28;--panel:#0e2130;--panel2:#132a3b;
  --ink:#eff7fb;--text:#d1e0ea;--muted:#9db2c0;--line:#244052;
  --strong:#fff;--head:#c4e0ef;--accent:#7892ff;--accent-soft:rgba(120,146,255,.16);
  --accent2:#38c8b4;--gold:#ffd477;--pink:#ff7aa5;--hover:rgba(120,146,255,.12);--zebra:rgba(255,255,255,.025);
  --c-surface:#0a1a27;--c-panel:#11283a;--c-axis:#9eb8c8;--c-ink:#edf7fb;--c-grid:#29485d;--c-stripe:#1a394e;
  --shadow:0 24px 65px rgba(0,0,0,.35);--shadow-sm:0 8px 24px rgba(0,0,0,.25);
}
html{font-size:16px;scroll-behavior:auto}
body{font-family:-apple-system,BlinkMacSystemFont,"Avenir Next","Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:1rem;line-height:1.58;letter-spacing:-.005em;overflow-x:hidden}
button,input,select{font:inherit}
a,button,input{touch-action:manipulation}
:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 72%,white);outline-offset:3px}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.skip-link{position:fixed;z-index:3000;left:16px;top:12px;padding:12px 16px;background:var(--strong);color:var(--panel);border-radius:10px;transform:translateY(-160%)}
.skip-link:focus{transform:none}

.sidebar{width:var(--sb);top:0;bottom:0;left:0;border:0;border-right:1px solid var(--line);border-radius:0;padding:24px 18px 18px;box-shadow:none;background:color-mix(in srgb,var(--panel) 96%,transparent);backdrop-filter:blur(20px);display:flex;flex-direction:column}
.brand{padding:0 5px 20px;margin:0 0 18px;gap:12px;border-bottom:0;color:var(--text)}
.brand:hover{color:var(--text)}
.brand .logo{width:42px;height:42px;border-radius:12px;background:transparent;box-shadow:none}
.brand .logo img{width:100%;height:100%}
.brand b{font-size:15px;letter-spacing:-.35px}.brand small{font-size:10px;letter-spacing:.4px;text-transform:uppercase}
.exam-chip{cursor:default;text-align:left;margin:0 0 20px;padding:13px 14px;background:var(--accent-soft);color:var(--text);border:1px solid color-mix(in srgb,var(--accent) 24%,var(--line));box-shadow:none}
.exam-chip:hover{transform:none;filter:none}
.exam-chip>span{display:block;color:var(--accent);font-size:9px;font-weight:800;letter-spacing:1px;text-transform:uppercase}
.exam-chip>b{display:block;color:var(--strong);font-size:17px;line-height:1.3;margin:3px 0}.exam-chip>small{color:var(--muted);font-size:10.5px}
#nav{display:block;overflow-y:auto;padding-right:16px;scrollbar-gutter:stable}
.nav-group{margin-bottom:18px}.nav-group h2{margin:0 0 6px;padding:0 10px;color:var(--muted);font-size:9px;text-transform:uppercase;letter-spacing:1.3px;font-weight:800}
#nav a{min-height:42px;padding:8px 10px;gap:10px;border-radius:9px;font-size:12.5px;line-height:1.25}
#nav a.active{background:var(--accent-soft);box-shadow:inset 3px 0 0 var(--accent)}
.nav-icon{display:grid;place-items:center;flex:0 0 25px;height:25px;border:1px solid var(--line);border-radius:7px;font-size:9px;font-weight:800;color:var(--muted);background:var(--panel)}
.nav-icon--img{padding:0;border-color:transparent;background:transparent}
.nav-icon--img img{width:16px;height:16px;display:block;object-fit:contain}
#nav a.active .nav-icon{border-color:transparent;background:var(--accent);color:#fff}
.side-foot{margin-top:auto;padding:15px 4px 0;font-size:11px}.side-foot p{margin:0}.theme-btn{min-height:42px;margin-bottom:7px;text-align:left;padding:8px 12px;font-size:12px;background:transparent}
.mobile-header,.mobile-nav,.menu-scrim{display:none}

main{margin-left:var(--sb);padding:42px clamp(28px,4vw,70px) 110px;max-width:none;width:calc(100% - var(--sb));min-height:100vh}
main>*{width:min(1180px,100%);margin-left:auto;margin-right:auto}

.premium-head,
.page-head,
.section-heading,
.surface,
.lec-section,
.summary-band,
.cheat,
.source-grid>section,
.visual-lab-section,
.assessment-shell,
.lesson-stream,
.history-list,
.result-page,
.surface > * {
  max-width:var(--content-max-width, min(1180px, 100%));
}

.summary-band{
  width:100%;
  margin-left:0;
  margin-right:0;
}
h1{font-size:clamp(2.35rem,4vw,4.6rem);line-height:.98;letter-spacing:-.058em;font-weight:760}
h2{letter-spacing:-.035em}.eyebrow{display:block;color:var(--accent);font-size:.68rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase}
.premium-head{max-width:var(--content-max-width, min(1180px, 100%));margin:0 auto 34px}.premium-head h1{margin:9px 0 13px;font-size:clamp(2.4rem,4.5vw,4.4rem)}.premium-head>p{max-width:720px;color:var(--muted);font-size:1.05rem;margin:0}
.premium-head .eyebrow{margin-bottom:0.55rem}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:11px;font-size:.88rem;font-weight:750;letter-spacing:-.01em;cursor:pointer;transition:transform .18s ease,background .18s ease,border-color .18s ease,color .18s ease;box-shadow:none}
.btn:hover{transform:translateY(-2px)}.btn:disabled{transform:none;opacity:.45}
.btn-primary{background:var(--strong);color:#fff;border:1px solid var(--strong)}body.theme-dark .btn-primary{background:var(--accent);border-color:var(--accent)}
.btn-quiet{background:transparent;color:var(--text);border:1px solid var(--line)}.btn-quiet:hover{background:var(--panel);border-color:var(--accent);color:var(--accent)}
.btn-large{min-height:56px;padding:15px 26px;font-size:1rem}.text-action{display:inline-flex;align-items:center;gap:8px;border:0;background:transparent;color:var(--accent);font-weight:750;cursor:pointer;padding:6px 0}

.command-hero{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(290px,.55fr);min-height:470px;overflow:hidden;background:var(--strong);border-radius:24px;color:#fff;margin-bottom:0;box-shadow:var(--shadow)}
.hero-copy{padding:clamp(36px,6vw,76px);position:relative;background-image:radial-gradient(circle at 75% 10%,rgba(120,146,255,.22),transparent 35%),linear-gradient(125deg,transparent 55%,rgba(56,200,180,.08))}
.hero-copy::after{content:"";position:absolute;right:8%;bottom:8%;width:180px;height:180px;border:1px solid rgba(255,255,255,.08);border-radius:50%;box-shadow:0 0 0 38px rgba(255,255,255,.025),0 0 0 76px rgba(255,255,255,.015)}
.hero-copy .eyebrow{color:#9fb1ff}.hero-copy h1{position:relative;z-index:1;max-width:790px;color:#fff;margin:14px 0 24px}.hero-copy>p{position:relative;z-index:1;max-width:700px;color:#cad8e2;font-size:1.08rem}
.hero-actions{position:relative;z-index:1;display:flex;gap:10px;flex-wrap:wrap;margin:28px 0}.hero-copy .btn-primary{background:#fff;border-color:#fff;color:#0b1b29}.hero-copy .btn-quiet{border-color:rgba(255,255,255,.24);color:#fff}.hero-copy .btn-quiet:hover{background:rgba(255,255,255,.08)}
.evidence-line{position:relative;z-index:1;color:#9eb0bc;font-size:.75rem}.evidence-line b{color:#fff}.evidence-line span{padding:0 7px}
.next-action-panel{padding:clamp(28px,4vw,50px);display:flex;flex-direction:column;justify-content:flex-end;background:linear-gradient(165deg,#405fe5,#1f3db8);border-left:1px solid rgba(255,255,255,.12)}
.next-action-panel>span{font-size:.65rem;text-transform:uppercase;letter-spacing:.13em;font-weight:800;color:#c8d2ff}.next-action-panel h2{font-size:1.75rem;line-height:1.1;color:#fff;margin:10px 0 13px}.next-action-panel p{font-size:.88rem;color:#dbe2ff}.next-action-panel .text-action{color:#fff;margin-top:12px}
.exam-ribbon{display:grid;grid-template-columns:repeat(4,1fr);background:var(--panel);border:1px solid var(--line);border-top:0;border-radius:0 0 18px 18px;margin-bottom:28px;overflow:hidden}
.exam-ribbon>div{padding:16px 20px;border-right:1px solid var(--line)}.exam-ribbon>div:last-child{border:0}.exam-ribbon span{display:block;font-size:.6rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;font-weight:800}.exam-ribbon b{font-size:.78rem;color:var(--strong)}

.surface{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:26px 28px}
.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(300px,.8fr);gap:18px;margin-bottom:18px}
.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:22px}
.section-heading > div{min-width:0}
.section-heading > a{align-self:flex-end}
.section-heading h2,.surface>h2{font-size:1.5rem;margin:5px 0 0}
.section-heading h2{word-break:break-word;hyphens:auto}
.section-heading p{margin:4px 0 0;color:var(--muted);font-size:.88rem}
.surface-intel-controls{display:grid;grid-template-columns:1fr;gap:18px}
.intel-controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.intel-controls label{display:flex;flex-direction:column;gap:8px;color:var(--text);font-size:.82rem;font-weight:700}
.intel-controls input.intel-search{height:42px;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--text)}
.intel-control-row{display:flex;flex-wrap:wrap;gap:8px}
.intel-control-row .btn{min-height:38px;padding:9px 12px}
.intel-controls .btn.btn-strong{background:var(--accent);border-color:var(--accent);color:#fff}
body.theme-dark .intel-controls .btn.btn-strong{background:var(--accent-soft);color:var(--strong)}
.intel-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:16px}
.intel-matrix{display:flex;flex-direction:column;gap:9px;margin-top:8px}
.intel-matrix-row{display:grid;grid-template-columns:84px minmax(0,1fr);gap:10px;align-items:stretch}
.intel-week-label{display:grid;place-items:center;background:var(--c-surface);border:1px solid var(--line);border-radius:10px;font-size:.63rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:800}
.intel-matrix-cells{display:grid;grid-template-columns:repeat(auto-fit,minmax(138px,1fr));gap:9px}
.intel-matrix-cell{display:flex;flex-direction:column;gap:2px;justify-content:center;align-items:flex-start;min-height:68px;padding:9px 10px 10px;border:1px solid var(--line);border-radius:10px;background:var(--c-surface);color:var(--text);text-align:left}
.intel-matrix-cell:hover{border-color:var(--accent);background:var(--accent-soft)}
.intel-matrix-cell.active{border-color:var(--accent);box-shadow:inset 3px 0 0 var(--accent)}
.intel-matrix-cell span{display:block;font-size:.62rem;color:var(--muted);font-weight:700}
.intel-matrix-cell b{font-size:.87rem;line-height:1.1}
.intel-matrix-cell[data-density]{position:relative;overflow:hidden}
.intel-matrix-cell[data-density]::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4px;background:linear-gradient(90deg,var(--accent) var(--density),var(--line) var(--density))}
.intel-topic-detail{font-size:.94rem}.intel-topic-detail p{margin:.2rem 0}
.intel-topic-detail .intel-detail-list{padding-left:18px;color:var(--muted);font-size:.84rem}
.intel-detail-list{margin:.4rem 0 1rem}
.intel-matrix-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:4px}
.intel-matrix-head b{font-size:.84rem}
.intel-scenario-layout{display:grid;grid-template-columns:1fr;gap:14px}
.intel-scenario-option{display:flex;align-items:flex-start;gap:10px;width:100%;min-height:52px;padding:11px 13px;text-align:left;color:var(--text);border:1px solid var(--line);border-radius:11px;background:var(--panel2)}
.intel-scenario-option:hover{border-color:var(--accent)}
.intel-scenario-option.active{background:var(--accent-soft);border-color:var(--accent);box-shadow:inset 3px 0 0 var(--accent)}
.intel-scenario-option span{display:grid;place-items:center;flex:0 0 26px;height:26px;border-radius:9px;background:var(--panel);border:1px solid var(--line);font-size:.67rem;font-weight:800}
.intel-scenario-option b{font-size:.84rem}
.intel-scenario-option[aria-pressed=\"true\"]{font-weight:700}
.intel-scenario-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:6px 0 12px}
.intel-scenario-progress{font-size:.74rem;color:var(--muted)}
.intel-scenario-feedback{min-height:48px;display:flex;gap:8px;align-items:flex-start;padding:9px 12px;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0}
.intel-scenario-feedback strong{display:block;color:var(--strong);font-size:.83rem}
.intel-scenario-feedback{color:var(--muted);font-size:.82rem}
.intel-scenario-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.intel-scenario-table{overflow:auto;border-radius:12px;border:1px solid var(--line)}
.intel-scenario-table .dv-table{margin:0}
.intel-map-lab{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel2);padding:10px}
.knowledge-map{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;position:relative}.knowledge-week{padding:0;margin:0}.knowledge-week h3{font-size:.65rem;color:var(--muted);letter-spacing:.1em;margin-bottom:8px}.knowledge-week>div{display:flex;flex-direction:column;gap:7px}
.knowledge-node{position:relative;display:flex;flex-direction:column;min-height:88px;padding:12px 12px 15px;border:1px solid var(--line);border-radius:11px;background:var(--c-surface);color:var(--text);overflow:hidden;transition:.18s}.knowledge-node:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--text)}.knowledge-node span{font-size:.72rem;font-weight:750}.knowledge-node b{font-size:.62rem;color:var(--muted);font-weight:600;margin-top:2px}.knowledge-node i{position:absolute;left:0;right:0;bottom:0;height:4px;background:linear-gradient(90deg,var(--accent) var(--mastery),var(--line) var(--mastery))}
.readiness{display:flex;gap:16px;align-items:center;margin:16px 0 22px}.readiness-ring{flex:0 0 100px;width:100px;height:100px;border-radius:50%;display:grid;place-items:center;align-content:center;background:radial-gradient(circle,var(--panel) 59%,transparent 61%),conic-gradient(var(--accent) var(--readiness),var(--line) 0);color:var(--strong)}.readiness-ring span{font-size:1.75rem;font-weight:800;line-height:1}.readiness-ring small{font-size:.56rem;color:var(--muted);text-transform:uppercase}.readiness>div:last-child b{font-size:.9rem}.readiness p{font-size:.74rem;color:var(--muted);margin:4px 0}
.week-progress{display:flex;flex-direction:column;gap:9px}.week-progress a{display:grid;grid-template-columns:28px 1fr 34px;align-items:center;gap:8px;font-size:.65rem;color:var(--text)}.week-progress div{height:4px;background:var(--line);border-radius:8px}.week-progress i{display:block;width:var(--value);height:100%;background:var(--accent);border-radius:inherit}.week-progress b{text-align:right;font-size:.62rem}
.analytics-tools{display:flex;justify-content:flex-start;align-items:center;gap:8px;margin-bottom:16px}
.analytics-window{display:inline-flex;gap:8px;flex-wrap:wrap}
.analytics-window .btn{min-height:36px;padding:10px 12px}
.analytics-window .btn.btn-strong{background:var(--strong);border-color:var(--strong);color:#fff}
body.theme-dark .analytics-window .btn.btn-strong{background:var(--accent);border-color:var(--accent)}
.analytics-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.analytics-metric-card{padding:15px 16px 16px;border:1px solid var(--line);border-radius:13px;background:var(--c-surface);display:flex;flex-direction:column;gap:4px}
.analytics-metric-card span{color:var(--muted);font-size:.66rem;text-transform:uppercase;letter-spacing:.12em;font-weight:800}
.analytics-metric-card b{font-size:1.55rem;line-height:1;display:block;color:var(--strong)}
.analytics-metric-card small{color:var(--muted);font-size:.7rem}
.analytics-bars,.analytics-topic-grid,.analytics-badges{display:flex;flex-direction:column;gap:8px}
.analytics-bars{margin-top:6px}
.analytics-row{display:grid;grid-template-columns:64px 1fr auto;align-items:center;gap:8px;font-size:.83rem}
.analytics-row>span:first-child{font-weight:800}
.analytics-row>span:last-child{color:var(--muted);font-size:.76rem}
.analytics-bar{display:block;height:8px;background:var(--line);border-radius:999px;position:relative;overflow:hidden}
.analytics-bar i{display:block;width:var(--value);height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:inherit}
.analytics-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.analytics-topic{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;padding:11px 12px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.analytics-topic span{display:flex;flex-direction:column;gap:2px;min-width:0}
.analytics-topic b{color:var(--strong);font-size:.74rem;line-height:1.2}
.analytics-topic small{font-size:.64rem;color:var(--muted);margin-top:2px}
.analytics-topic i{font-size:.65rem;color:var(--muted)}
.analytics-topic .analytics-bar{width:min(160px,38vw)}
.analytics-topic.empty{opacity:.7;border-style:dashed}
.analytics-badges{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.analytics-badges span{padding:12px;background:var(--c-surface);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;gap:2px}
.analytics-badges b{font-size:.75rem;color:var(--strong)}
.analytics-list{padding-left:18px;color:var(--muted);font-size:.84rem;line-height:1.45}
.analytics-empty{margin:12px 0 2px;padding:12px;border-left:3px solid color-mix(in srgb,var(--pink) 60%,var(--line));background:var(--panel2);border-radius:0 8px 8px 0;color:var(--muted);font-size:.76rem}
.analytics-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:13px}
.planner-surface{display:grid;grid-template-columns:minmax(250px,.55fr) 1fr;gap:35px;align-items:center}.time-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.time-choices button{min-height:92px;text-align:left;padding:15px;border:1px solid var(--line);border-radius:12px;background:var(--c-surface);color:var(--text);cursor:pointer}.time-choices button:hover{border-color:var(--accent);background:var(--accent-soft)}.time-choices b,.time-choices span{display:block}.time-choices b{color:var(--strong)}.time-choices span{font-size:.68rem;color:var(--muted)}
.study-plan{display:flex;gap:22px;align-items:center}.plan-timeline{display:flex;flex:1;gap:8px}.plan-timeline>div{display:flex;align-items:center;gap:8px;flex:1}.plan-timeline>div>span{display:grid;place-items:center;flex:0 0 28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;font-size:.7rem;font-weight:800}.plan-timeline p{margin:0}.plan-timeline b,.plan-timeline small{display:block}.plan-timeline b{font-size:.72rem}.plan-timeline small{font-size:.62rem;color:var(--muted)}
.plan-timeline>div:not(.current):not(.done){opacity:.55}.plan-timeline>div.done>span{background:var(--accent2)}.plan-route-banner{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:12px;max-width:1180px!important;margin:0 auto 24px;padding:18px 20px;border:1px solid color-mix(in srgb,var(--accent) 34%,var(--line));border-radius:15px;background:var(--accent-soft)}.plan-route-banner b{font-size:1rem}.plan-route-banner p{margin:2px 0 0;color:var(--muted);font-size:.78rem}

.lesson-progress,.assessment-progress{height:5px;background:var(--line);border-radius:8px;overflow:hidden}.lesson-progress i,.assessment-progress i{display:block;height:100%;width:var(--value);background:linear-gradient(90deg,var(--accent),var(--accent2))}.premium-head .lecture-jump{margin-top:22px}.lecture-jump a{min-height:34px;display:inline-flex;align-items:center;color:var(--text);font-size:.72rem}.lesson-stream{max-width:var(--content-max-width, min(1180px, 100%));margin-left:auto;margin-right:auto}.lec-section{padding:0;margin-bottom:26px;border:1px solid var(--line);border-radius:18px;box-shadow:none;overflow:hidden}.lec-section>header{display:grid;grid-template-columns:minmax(36px,46px) minmax(0,1fr) auto;align-items:flex-start;gap:12px;padding:19px 24px;border-bottom:1px solid var(--line);background:var(--c-surface)}.lec-section>header>span{font-size:.72rem;color:var(--accent);font-weight:800}.lec-section>header h2{margin:0;font-size:1.25rem;min-width:0;word-break:break-word;line-height:1.2}.lec-section>header small{color:var(--muted);font-size:.6rem;white-space:nowrap;align-self:flex-end}.lesson-body{padding:24px 28px}.lesson-body>.visual-shell{margin-top:28px}.lesson-loop{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:18px;padding:18px 24px;border-top:1px solid var(--line);background:var(--c-surface)}.lesson-loop b{display:block;font-size:.8rem}.confidence-group{display:flex;gap:4px}.confidence-group button,.card-confidence button,.flashcard-filters button{min-height:38px;padding:7px 11px;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:9px;font-size:.7rem;cursor:pointer}.confidence-group button.selected,.card-confidence button:hover,.flashcard-filters button.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.blk-note{margin:14px 0;padding:13px 15px;border-left:3px solid var(--accent2);background:color-mix(in srgb,var(--accent2) 7%,var(--panel));border-radius:0 10px 10px 0;font-size:.86rem}.blk-note span{display:block;font-size:.58rem;text-transform:uppercase;color:var(--accent2);font-weight:800;letter-spacing:.1em}.summary-band{max-width:var(--content-max-width, min(1180px, 100%));width:min(100%, var(--content-max-width, min(1180px, 100%)));padding:30px 34px;background:var(--strong);border-radius:18px;color:#d7e3eb;margin-left:auto;margin-right:auto}.summary-band>span{font-size:.65rem;color:#9fb1ff;text-transform:uppercase;letter-spacing:.12em;font-weight:800}.summary-band p{font-size:1.04rem;margin:8px 0 14px}.summary-band>div{display:flex;gap:9px;align-items:center;flex-wrap:wrap}.summary-band .btn-quiet{color:#fff;border-color:rgba(255,255,255,.2)}
.visual-shell{border-radius:14px;box-shadow:none}.visual-head{padding:12px 15px}.visual-head span{font-size:.6rem}.visual-head b{font-size:.8rem}.visual-stage{font-size:.88rem}.visual-index{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:34px}.visual-index a{min-height:46px;padding:10px 13px}.visual-lab-section{margin-bottom:44px}.visual-lab-section>header{display:flex;align-items:flex-start;gap:12px;border-bottom:1px solid var(--line);margin-bottom:18px}.visual-lab-section>header span{font-size:.7rem;color:var(--accent);font-weight:800}.visual-lab-section>header h2{font-size:1.45rem;margin:3px 0 0;word-break:break-word}
.visual-loading{min-height:120px;display:grid;place-items:center;color:var(--muted);font-size:.72rem}.course-taxonomy{display:flex;flex-direction:column;margin-bottom:12px;padding:10px 12px;border-left:3px solid var(--gold);background:var(--panel);font-size:.72rem}.course-taxonomy small{color:var(--muted)}

.assessment-intro,.mock-contract{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:22px}.assessment-intro>div,.mock-contract>div{padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:14px}.assessment-intro span,.mock-contract span{font-size:2.2rem;color:var(--accent);font-weight:800;line-height:1}.assessment-intro b,.assessment-intro p,.mock-contract b,.mock-contract small{display:block}.assessment-intro b,.mock-contract b{font-size:.82rem;margin-top:7px}.assessment-intro p,.mock-contract small{font-size:.7rem;color:var(--muted);margin:3px 0}.previous-result,.practice-note,.source-warning{margin:18px 0;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--c-surface)}.previous-result span,.previous-result b{display:block}.previous-result span{font-size:.65rem;color:var(--muted);text-transform:uppercase}.previous-result b{font-size:1.25rem}.previous-result p,.practice-note p,.source-warning p{margin:2px 0;color:var(--muted);font-size:.8rem}.exam-rules{display:grid;grid-template-columns:1fr 1fr;gap:7px 28px;margin:22px 0;padding-left:20px;color:var(--text)}
.practice-builder{padding:28px;background:var(--panel);border:1px solid var(--line);border-radius:17px;display:grid;grid-template-columns:1fr 1fr auto;align-items:end;gap:24px}.practice-builder fieldset{border:0;padding:0;margin:0}.practice-builder legend{font-size:.68rem;color:var(--muted);font-weight:800;text-transform:uppercase;letter-spacing:.09em;margin-bottom:9px}.practice-builder label{display:inline-block;margin:3px}.practice-builder input{position:absolute;opacity:0}.practice-builder label span{display:inline-flex;min-height:40px;align-items:center;padding:8px 12px;border:1px solid var(--line);border-radius:9px;cursor:pointer;font-size:.74rem}.practice-builder input:checked+span{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.practice-builder input:focus-visible+span{outline:3px solid color-mix(in srgb,var(--accent) 70%,white);outline-offset:2px}
.assessment-shell{max-width:var(--content-max-width, min(1180px, 100%));margin-left:auto;margin-right:auto}.assessment-header{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:17px}.assessment-header h1{font-size:2rem;letter-spacing:-.04em;margin:6px 0 0}.assessment-meta{display:flex;gap:14px;align-items:center;color:var(--muted);font-size:.76rem}.assessment-meta b{padding:7px 10px;background:var(--strong);color:#fff;border-radius:8px;font-variant-numeric:tabular-nums}.assessment-layout{display:grid;grid-template-columns:minmax(0,1fr) 225px;gap:18px;margin-top:20px}.question-panel{margin:0;width:auto;padding:30px;background:var(--panel);border:1px solid var(--line);border-radius:18px;min-height:540px;display:flex;flex-direction:column}.question-meta{display:flex;gap:6px;margin-bottom:15px}.question-meta span{padding:4px 8px;border-radius:20px;background:var(--panel2);color:var(--muted);font-size:.62rem;font-weight:700}.question-fieldset{border:0;margin:0;padding:0}.question-fieldset legend{color:var(--strong);font-size:1.35rem;line-height:1.35;font-weight:750;margin-bottom:24px}.answer-options{display:flex;flex-direction:column;gap:9px}.answer-option{display:grid;grid-template-columns:30px 1fr auto;align-items:center;gap:10px;min-height:58px;padding:11px 14px;border:1px solid var(--line);border-radius:11px;background:var(--c-surface);cursor:pointer;transition:.14s}.answer-option:hover{border-color:var(--accent);background:var(--accent-soft)}.answer-option:has(input:checked){border-color:var(--accent);box-shadow:inset 3px 0 0 var(--accent);background:var(--accent-soft)}.answer-option.correct{border-color:var(--accent2);background:color-mix(in srgb,var(--accent2) 10%,var(--panel))}.answer-option.wrong{border-color:var(--pink);background:color-mix(in srgb,var(--pink) 9%,var(--panel))}.answer-option input{position:absolute;opacity:0}.answer-option:has(input:focus-visible){outline:3px solid color-mix(in srgb,var(--accent) 70%,white);outline-offset:2px}.option-letter{display:grid;place-items:center;width:28px;height:28px;border:1px solid var(--line);border-radius:8px;font-size:.7rem;font-weight:800}.answer-explanation{margin-top:18px;padding:15px 17px;border-left:3px solid var(--accent);background:var(--panel2);border-radius:0 10px 10px 0}.answer-explanation>span{font-size:.63rem;color:var(--accent);font-weight:800;text-transform:uppercase}.answer-explanation p{margin:3px 0;font-size:.85rem}.question-controls{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding-top:28px}.flag-btn{min-height:42px;border:0;background:transparent;color:var(--muted);cursor:pointer}.flag-btn.active{color:var(--gold);font-weight:750}
.question-navigator{padding:18px;background:var(--panel);border:1px solid var(--line);border-radius:15px;align-self:start;position:sticky;top:20px}.question-navigator h2{font-size:.8rem;margin:0 0 12px}.question-navigator>div{display:grid;grid-template-columns:repeat(5,1fr);gap:5px}.question-navigator button{aspect-ratio:1;border:1px solid var(--line);border-radius:7px;background:var(--c-surface);color:var(--muted);font-size:.65rem;cursor:pointer}.question-navigator button.answered{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}.question-navigator button.current{box-shadow:0 0 0 2px var(--strong)}.question-navigator button.flagged{border-bottom:4px solid var(--gold)}.question-navigator p{font-size:.6rem;color:var(--muted)}.question-navigator p i{display:inline-block;width:8px;height:8px;margin:0 3px 0 8px}.question-navigator p i.answered{background:var(--accent)}.question-navigator p i.flagged{background:var(--gold)}
.result-page>header{text-align:center;max-width:760px;margin:0 auto 28px}.score-orbit{width:150px;height:150px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;align-content:center;margin:16px auto;background:var(--panel);box-shadow:0 0 0 20px var(--panel2)}.score-orbit span{font-size:2.5rem;font-weight:800;color:var(--accent);line-height:1}.score-orbit small{color:var(--muted)}.result-page h1{font-size:2.6rem}.result-weeks{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:18px}.result-weeks>div{padding:18px;background:var(--panel);border:1px solid var(--line);border-radius:12px}.result-weeks span,.result-weeks b{display:block}.result-weeks span{font-size:.65rem;color:var(--muted)}.result-weeks b{font-size:1.2rem}.result-weeks meter{width:100%;accent-color:var(--accent)}.result-action{padding:25px 28px;background:var(--strong);border-radius:15px;color:#dbe5ec}.result-action h2{color:#fff;margin:6px 0}.result-action p{font-size:.85rem}.result-action .btn{margin-right:6px}.answer-review{margin-top:30px}.review-item{border:1px solid var(--line);background:var(--panel);border-radius:10px;margin:7px 0;overflow:hidden}.review-item summary{display:grid;grid-template-columns:30px 70px 1fr;gap:10px;padding:13px 15px;cursor:pointer;font-size:.8rem}.review-item summary span{color:var(--muted)}.review-item.correct summary b{color:var(--accent2)}.review-item.wrong summary b{color:var(--pink)}.review-item>div{padding:5px 55px 16px;font-size:.8rem;color:var(--text)}.result-footer{display:flex;gap:8px;margin-top:24px}

.flashcard-filters{display:flex;gap:6px;margin-bottom:18px}.fc-stage{margin-top:0}.flashcard{width:min(720px,100%);height:350px;border:0;background:transparent}.fc-face{border-radius:22px;padding:42px;background:var(--strong);box-shadow:var(--shadow)}.fc-back{background:linear-gradient(135deg,#0b786e,#0b9b8d)}.fc-face small{font-size:.68rem;letter-spacing:.14em}.fc-face strong{font-size:clamp(1.3rem,3vw,2.1rem);color:#fff;max-width:600px}.fc-face em{position:absolute;bottom:22px;font-style:normal;font-size:.68rem;color:rgba(255,255,255,.7)}.fc-controls{align-items:center}.fc-controls>span{color:var(--muted);font-size:.75rem}.card-confidence{display:flex;align-items:center;gap:6px;margin-top:15px}.card-confidence>span{font-size:.72rem;color:var(--muted);margin-right:8px}
.cheat-grid,.source-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.cheat,.source-grid>section{padding:25px;background:var(--panel);border:1px solid var(--line);border-radius:15px}.cheat>span,.source-grid>section>span{font-size:.65rem;color:var(--accent);font-weight:800}.cheat h2,.source-grid h2{font-size:1.2rem;margin:5px 0 12px}.cheat li,.source-grid li{font-size:.8rem;margin:7px 0}.source-grid a{display:flex;justify-content:space-between;gap:10px}.print-btn{margin-top:18px}
.history-list{display:flex;flex-direction:column}.history-list>div{display:grid;grid-template-columns:1fr auto 140px;gap:20px;padding:12px 0;border-top:1px solid var(--line);font-size:.75rem}.history-list time,.history-list span{color:var(--muted)}.empty-state{padding:22px;background:var(--c-surface);border-radius:12px}.empty-state p{color:var(--muted);font-size:.8rem}

.lecture-cover{width:min(100%,900px);margin:20px auto 24px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#f8fbff}
.lecture-cover img{display:block;width:100%;height:auto;aspect-ratio:2/1;object-fit:contain}
.lecture-cover figcaption{font-size:12px;color:var(--muted);padding:9px 12px;border-top:1px solid var(--line)}

@media (max-width:1050px){
  :root{--sb:236px}.command-hero{grid-template-columns:1fr}.next-action-panel{min-height:230px;border-left:0;border-top:1px solid rgba(255,255,255,.12)}.dashboard-grid{grid-template-columns:1fr}.planner-surface{grid-template-columns:1fr}.intel-grid{grid-template-columns:1fr}.intel-matrix-cells{grid-template-columns:repeat(auto-fit,minmax(120px,1fr))}.intel-controls{grid-template-columns:1fr}.intel-control-row{gap:6px}.knowledge-map{grid-template-columns:repeat(2,1fr)}.analytics-grid{grid-template-columns:1fr}.analytics-topic-grid{grid-template-columns:1fr}.analytics-badges{grid-template-columns:repeat(2,1fr)}.analytics-list{padding-left:0}.assessment-layout{grid-template-columns:1fr}.question-navigator{position:static}.question-navigator>div{grid-template-columns:repeat(10,1fr)}
}

@media (max-width:760px){
  body{padding-top:64px;padding-bottom:68px}.mobile-header{display:grid;grid-template-columns:1fr auto 44px;align-items:center;gap:10px;position:fixed;z-index:120;left:0;right:0;top:0;height:64px;padding:8px 12px;background:color-mix(in srgb,var(--panel) 94%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.mobile-brand{display:flex;align-items:center;gap:8px;color:var(--text)}.mobile-brand-logo{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--strong);padding:2px}.mobile-brand-logo img{width:100%;height:100%;object-fit:contain}.mobile-brand b{font-size:.8rem}.mobile-exam{text-align:right}.mobile-exam span,.mobile-exam b{display:block}.mobile-exam span{font-size:.52rem;color:var(--muted);text-transform:uppercase}.mobile-exam b{font-size:.68rem}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:4px;width:44px;height:44px;border:0;background:transparent}.menu-toggle>span:not(.sr-only){display:block;width:20px;border-top:2px solid var(--text);margin:auto}.sidebar{position:fixed;z-index:150;top:0;bottom:0;left:0;width:min(330px,88vw);margin:0;border-radius:0;display:flex;transform:translateX(-105%);transition:transform .25s ease}.menu-open .sidebar{transform:none}.menu-scrim{display:block;position:fixed;z-index:140;inset:0;border:0;background:rgba(2,10,18,.55);opacity:0;visibility:hidden;transition:.2s}.menu-open .menu-scrim{opacity:1;visibility:visible}.mobile-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;z-index:110;left:0;right:0;bottom:0;min-height:64px;padding-bottom:env(safe-area-inset-bottom);background:var(--panel);border-top:1px solid var(--line)}.mobile-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:var(--muted);font-size:.62rem}.mobile-nav a span{font-size:1rem}.mobile-nav a.active{color:var(--accent);font-weight:800}
  main{margin-left:0;width:100%;padding:20px 14px 70px}.command-hero{border-radius:18px;min-height:0}.hero-copy{padding:34px 24px}.hero-copy h1{font-size:2.65rem}.hero-copy>p{font-size:.94rem}.hero-copy::after{display:none}.next-action-panel{padding:25px;min-height:210px}.exam-ribbon{grid-template-columns:1fr 1fr}.exam-ribbon>div{padding:13px}.exam-ribbon>div:nth-child(2){border-right:0}.exam-ribbon>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.surface{padding:21px}.knowledge-map{grid-template-columns:1fr 1fr}.planner-surface{gap:12px}.time-choices{grid-template-columns:1fr}.time-choices button{min-height:68px}.study-plan{align-items:stretch;flex-direction:column}.plan-timeline{flex-direction:column}.plan-route-banner{grid-template-columns:1fr}.plan-route-banner .btn{width:100%}.premium-head h1{font-size:2.65rem}.lecture-jump{display:flex;overflow-x:visible;flex-wrap:wrap;padding-bottom:0;row-gap:7px;column-gap:6px}.lecture-jump a{white-space:normal}.lec-section>header{grid-template-columns:36px 1fr;padding:16px;align-items:flex-start}.lec-section>header small{display:none}.lesson-body{padding:19px 16px}.lesson-loop{grid-template-columns:1fr;padding:16px}.confidence-group{order:3}.summary-band{padding:24px 20px}.visual-index{grid-template-columns:1fr 1fr}.assessment-intro,.mock-contract{grid-template-columns:1fr}.practice-builder{grid-template-columns:1fr;padding:20px}.assessment-header{align-items:flex-start}.assessment-meta{flex-direction:column;align-items:flex-end}.question-panel{padding:20px 16px;min-height:0}.question-fieldset legend{font-size:1.12rem}.question-controls{flex-wrap:wrap}.question-navigator>div{grid-template-columns:repeat(8,1fr)}.result-weeks{grid-template-columns:1fr 1fr}.result-page h1{font-size:2rem}.review-item summary{grid-template-columns:26px 65px 1fr}.review-item>div{padding:5px 15px 15px}.cheat-grid,.source-grid{grid-template-columns:1fr}.history-list>div{grid-template-columns:1fr auto}.history-list span{grid-column:1/-1}.flashcard{height:390px}.card-confidence{flex-wrap:wrap;justify-content:center}.card-confidence>span{width:100%;text-align:center}.format-grid,.variable-grid,.threat-grid{grid-template-columns:1fr 1fr}.projection-flow{grid-template-columns:1fr}.criteria-venn{transform:scale(.78);margin:-20px -70px}.visual-stage{overflow-x:auto}
}

@media (max-width:430px){
  .hero-actions{flex-direction:column}.hero-actions .btn{width:100%}.hero-copy h1{font-size:2.35rem}.exam-ribbon{grid-template-columns:1fr}.exam-ribbon>div{border-right:0;border-bottom:1px solid var(--line)!important}.knowledge-map{grid-template-columns:1fr}.visual-index{grid-template-columns:1fr}.question-navigator>div{grid-template-columns:repeat(5,1fr)}.result-weeks{grid-template-columns:1fr 1fr}.assessment-meta>span{display:none}.lesson-loop .text-action{align-self:flex-start}.flashcard{height:420px}.fc-face{padding:28px 20px}.format-grid,.variable-grid,.threat-grid{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

@media print{
  :root,body.theme-dark{--panel:#fff;--panel2:#fff;--bg:#fff;--text:#000;--muted:#333;--strong:#000;--ink:#000;--head:#000;--line:#bbb}
  body{padding:0;background:#fff;color:#000}.sidebar,.mobile-header,.mobile-nav,.menu-scrim,.hero-actions,.lesson-loop,.question-controls,.print-btn{display:none!important}main{margin:0;width:100%;padding:20px}.command-hero,.summary-band{background:#fff;color:#000;border:1px solid #bbb;box-shadow:none}.hero-copy h1,.next-action-panel h2,.summary-band *{color:#000}.next-action-panel{background:#fff;border:0}.cheat,.lec-section{break-inside:avoid}
}

/* ==================== layout overlap hardening ==================== */
:root{
  --sidebar-width: clamp(192px, 15.5vw, 234px);
  --sidebar-offset: 14px;
  --content-sidebar-offset: calc(var(--sidebar-width) + var(--sidebar-offset));
  --content-gutter-x: clamp(14px, 2.5vw, 44px);
  --content-max-width: min(1180px, calc(100vw - var(--content-sidebar-offset) - (var(--content-gutter-x) * 2)));
  --sb: var(--sidebar-width);
}

.sidebar{
  left: var(--sidebar-offset);
  width: var(--sidebar-width);
  z-index: 180;
}
#nav{
  overflow-y:auto;
  padding-right:12px;
  scrollbar-gutter: stable;
}

main{
  margin-left: var(--content-sidebar-offset);
  width: calc(100% - var(--content-sidebar-offset));
  max-width: var(--content-max-width);
  padding-left: max(14px, var(--content-gutter-x));
  padding-right: max(14px, var(--content-gutter-x));
  box-sizing: border-box;
  position: relative;
  z-index: 0;
  overflow-x: hidden;
}

.lecture-jump{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.lecture-jump a{
  flex: 0 1 auto;
}

.summary-band,
.lec-section,
.surface,
.cheat,
.source-grid>section,
.visual-shell,
.card,
.visual-lab-section,
.intel-map-lab,
.visual-loading,
.workflow-layout{
  max-width: 100%;
  width: min(var(--content-max-width, 100%), 100%);
  box-sizing: border-box;
}

@media (max-width: 1050px){
  :root{
    --sidebar-width: 236px;
  }
}

@media (max-width: 760px){
  .sidebar{
    width: min(330px, 88vw);
    left: 0;
  }
  main{
    margin-left: 0;
    width: 100%;
    max-width: none;
  }
  .lecture-jump{
    overflow-x: visible;
    flex-wrap: wrap;
    padding-bottom: 0;
    row-gap: 7px;
    column-gap: 6px;
  }
  .lecture-jump a{
    white-space: normal;
  }

  .anatomy-layout,
  .cosmetic-layout,
  .gis-system,
  .projection-flow,
  .format-grid,
  .variable-grid,
  .threat-grid{display:grid;grid-template-columns:1fr;}

  .mode-stage.dynamic .mode-dot{
    transform:translate(0,40px) scale(1.24);
  }
  .mode-stage.filtered .mode-dot{
    transform:translate(0,5px);
  }
}