/* ============================================================
   MCQ quiz theme. Brand accent is neutral here; app.js overrides
   --brand/--brand2 (and --brand-ink) from META.accent/accent2 (course.config.json).
   glow/grad/ring are derived from --brand/--brand2.
   Dark by default; [data-theme] drives the manual light/dark toggle.
   Ported from databases-quiz; class & --var names are load-bearing
   (app.js and tools/verify_dom.js / shoot.js query them).
   Math is native MathML rendered at build time (no KaTeX CSS/fonts).
   Change a colour in ALL THREE palette blocks.
   ============================================================ */

:root{
  /* surfaces */
  --bg:#071316; --bg2:#0b1a24;
  --glow-a:color-mix(in srgb,var(--brand) 16%,transparent); --glow-b:color-mix(in srgb,var(--brand2) 14%,transparent);
  --card:rgba(16,34,42,.74); --card2:rgba(255,255,255,.045);
  --card-solid:#0f232b;
  /* text */
  --ink:#e6f4f5; --muted:#8fb3b9;
  /* lines & accents */
  --line:rgba(255,255,255,.09); --line-strong:rgba(255,255,255,.16);
  --brand:#818cf8; --brand2:#a78bfa; --brand-ink:#0b0b1a;
  --grad:linear-gradient(135deg,var(--brand) 0%,var(--brand2) 100%);
  --ok:#34d399; --ok-bg:rgba(52,211,153,.13);
  --bad:#fb7185; --bad-bg:rgba(251,113,133,.13);
  --warn:#fbbf24; --scroll-hint:rgba(0,0,0,.6);
  /* shape */
  --radius:18px; --radius-sm:12px; --radius-xs:9px;
  --shadow:0 14px 44px rgba(0,0,0,.45);
  --shadow-sm:0 4px 16px rgba(0,0,0,.28);
  --ring:0 0 0 3px color-mix(in srgb,var(--brand) 32%,transparent);

  font-family:"Segoe UI",system-ui,-apple-system,"Noto Sans Hebrew",Arial,sans-serif;
  color-scheme:dark;
}

/* ---- light palette (kept in one place, applied to both the explicit
        toggle and the system-preference fallback below) ---- */
:root[data-theme="light"]{
  --bg:#eef7f7; --bg2:#e6f1f8;
  --glow-a:color-mix(in srgb,var(--brand) 18%,transparent); --glow-b:color-mix(in srgb,var(--brand2) 14%,transparent);
  --card:rgba(255,255,255,.82); --card2:rgba(10,60,70,.045);
  --card-solid:#ffffff;
  --ink:#0e2429; --muted:#4d6b72;
  --line:rgba(10,60,70,.12); --line-strong:rgba(10,60,70,.20);
  --brand:#4f46e5; --brand2:#7c3aed; --brand-ink:#ffffff;
  --grad:linear-gradient(135deg,var(--brand) 0%,var(--brand2) 100%);
  --ok:#0f9d68; --ok-bg:rgba(15,157,104,.12);
  --bad:#e5484d; --bad-bg:rgba(229,72,77,.10);
  --shadow:0 14px 40px rgba(20,70,80,.14);
  --shadow-sm:0 4px 16px rgba(20,70,80,.09);
  --ring:0 0 0 3px color-mix(in srgb,var(--brand) 25%,transparent); --scroll-hint:rgba(10,60,70,.28);
  color-scheme:light;
}
/* system-pref light when the user hasn't chosen manually — same values as above */
@media (prefers-color-scheme: light){
  :root:not([data-theme]){
    --bg:#eef7f7; --bg2:#e6f1f8;
    --glow-a:color-mix(in srgb,var(--brand) 18%,transparent); --glow-b:color-mix(in srgb,var(--brand2) 14%,transparent);
    --card:rgba(255,255,255,.82); --card2:rgba(10,60,70,.045);
    --card-solid:#ffffff;
    --ink:#0e2429; --muted:#4d6b72;
    --line:rgba(10,60,70,.12); --line-strong:rgba(10,60,70,.20);
    --brand:#4f46e5; --brand2:#7c3aed; --brand-ink:#ffffff;
    --grad:linear-gradient(135deg,var(--brand) 0%,var(--brand2) 100%);
    --ok:#0f9d68; --ok-bg:rgba(15,157,104,.12);
    --bad:#e5484d; --bad-bg:rgba(229,72,77,.10);
    --shadow:0 14px 40px rgba(20,70,80,.14);
    --shadow-sm:0 4px 16px rgba(20,70,80,.09);
    --ring:0 0 0 3px color-mix(in srgb,var(--brand) 25%,transparent); --scroll-hint:rgba(10,60,70,.28);
    color-scheme:light;
  }
}

*{box-sizing:border-box}
html,body{overflow-x:hidden;max-width:100%}
*:focus-visible{outline:none;box-shadow:var(--ring);border-radius:var(--radius-xs)}

body{
  margin:0;min-height:100vh;line-height:1.55;color:var(--ink);
  background:
    radial-gradient(1100px 600px at 12% -8%, var(--glow-a), transparent 60%),
    radial-gradient(900px 520px at 100% 0%, var(--glow-b), transparent 55%),
    linear-gradient(165deg,var(--bg),var(--bg2));
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}

h1,h2,h3{margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:1.3rem;font-weight:800}
h2{font-size:1.25rem;font-weight:800}
h3{font-size:1rem;font-weight:700;color:var(--muted);text-transform:none;margin-top:.2em}
.sub{margin:0;color:var(--muted);font-size:.82rem}
.hidden{display:none !important}

/* ---------------- top bar ---------------- */
.topbar{
  position:sticky;top:0;z-index:20;
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  padding:.85rem 1.3rem;
  background:color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:.8rem}
.logo{
  font-size:1.4rem;width:2.5rem;height:2.5rem;display:grid;place-items:center;
  border-radius:14px;background:var(--grad);box-shadow:var(--shadow-sm);
  color:#fff;flex:none;
}
.topbar-right{display:flex;align-items:center;gap:.6rem}
.topstats{display:flex;gap:.5rem;flex-wrap:wrap}
.stat{
  background:var(--card2);border:1px solid var(--line);border-radius:12px;
  padding:.35rem .75rem;font-size:.76rem;color:var(--muted);line-height:1.25;text-align:center;
}
.stat b{display:block;color:var(--ink);font-size:1.05rem;font-weight:800}

/* theme toggle */
.theme-toggle{
  flex:none;width:2.4rem;height:2.4rem;border-radius:12px;cursor:pointer;
  display:grid;place-items:center;font-size:1.1rem;line-height:1;
  background:var(--card2);border:1px solid var(--line);color:var(--ink);
  transition:transform .15s ease,border-color .15s ease,background .15s ease;
}
.theme-toggle:hover{border-color:var(--brand);transform:translateY(-1px)}
.theme-toggle:active{transform:translateY(0) scale(.96)}

/* ---------------- layout ---------------- */
main{max-width:860px;margin:1.6rem auto;padding:0 1rem}
.card{
  background:var(--card);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:1.6rem 1.7rem;margin-bottom:1.1rem;
}

.screen{animation:fadein .35s ease both}
@keyframes fadein{from{opacity:0}to{opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion: reduce){ .screen{animation:none} *{transition-duration:.001ms !important} }

/* ---------------- start screen ---------------- */
.modes{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;margin-bottom:1.4rem}
.mode-card{position:relative;display:block;cursor:pointer}
.mode-card input{position:absolute;inset:0;opacity:0;cursor:pointer;margin:0}
.mode-body{
  display:flex;flex-direction:column;gap:.3rem;height:100%;
  border:1.5px solid var(--line);border-radius:14px;padding:1rem 1.1rem;
  background:var(--card2);transition:border-color .15s,box-shadow .15s,transform .15s;
}
.mode-card:hover .mode-body{border-color:var(--line-strong);transform:translateY(-2px)}
.mode-card input:checked + .mode-body{
  border-color:transparent;box-shadow:var(--ring),var(--shadow-sm);
  background:color-mix(in srgb, var(--brand) 12%, var(--card2));
}
.mode-title{font-weight:800;font-size:1rem}
.mode-desc{font-size:.8rem;color:var(--muted)}

.topic-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(155px,1fr));gap:.55rem;margin-bottom:1.1rem}
.topic-btn{
  display:flex;justify-content:space-between;align-items:center;gap:.5rem;text-align:right;
  border:1.5px solid var(--line);background:var(--card2);color:var(--ink);
  border-radius:12px;padding:.6rem .8rem;cursor:pointer;font:inherit;font-size:.86rem;
  transition:border-color .14s,background .14s,transform .14s;
}
.topic-btn .cnt{
  background:color-mix(in srgb, var(--ink) 8%, transparent);color:var(--muted);
  border-radius:20px;padding:.08rem .55rem;font-size:.72rem;font-weight:700;flex:none;
}
.topic-btn:hover:not(:disabled){border-color:var(--brand);transform:translateY(-1px)}
.topic-btn.active{
  border-color:transparent;color:var(--ink);
  background:color-mix(in srgb, var(--brand) 16%, var(--card2));box-shadow:var(--ring)
}
.topic-btn.active .cnt{background:var(--grad);color:#fff}
.topic-btn:disabled{opacity:.4;cursor:not-allowed}

/* part filter (א/ב/ג/ד) — compact chips */
.part-filter{display:flex;gap:.45rem;flex-wrap:wrap;margin-bottom:1.1rem}
.part-btn{
  display:inline-flex;align-items:center;gap:.4rem;
  border:1.5px solid var(--line);background:var(--card2);color:var(--ink);
  border-radius:20px;padding:.35rem .8rem;cursor:pointer;font:inherit;font-size:.82rem;
  transition:border-color .14s,background .14s,transform .14s;
}
.part-btn .cnt{background:color-mix(in srgb,var(--ink) 8%,transparent);color:var(--muted);
  border-radius:20px;padding:.02rem .45rem;font-size:.7rem;font-weight:700}
.part-btn:hover:not(:disabled){border-color:var(--brand);transform:translateY(-1px)}
.part-btn.active{border-color:transparent;background:color-mix(in srgb,var(--brand) 16%,var(--card2));box-shadow:var(--ring)}
.part-btn.active .cnt{background:var(--grad);color:#fff}
.part-btn:disabled{opacity:.4;cursor:not-allowed}

.options-row{display:flex;gap:1.4rem;flex-wrap:wrap;margin:.2rem 0 1.1rem}
.chk{display:flex;align-items:center;gap:.45rem;font-size:.85rem;color:var(--muted);cursor:pointer}
.chk input{accent-color:var(--brand);width:1.05em;height:1.05em;cursor:pointer}
.exam-opts{
  display:flex;gap:1rem;margin-bottom:1.1rem;flex-wrap:wrap;
  padding:.9rem 1rem;border:1px dashed var(--line);border-radius:14px;background:var(--card2)
}
.exam-opts label{display:flex;flex-direction:column;gap:.3rem;font-size:.8rem;color:var(--muted);font-weight:600}
.exam-opts select{
  background:var(--card-solid);color:var(--ink);border:1px solid var(--line);
  border-radius:10px;padding:.45rem .7rem;font:inherit;cursor:pointer
}
.exam-opts label:has(#examPick){flex:1 1 16rem;min-width:12rem}
.exam-opts #examPick{width:100%}
.poolinfo{color:var(--muted);font-size:.82rem;text-align:center;margin:.7rem 0 0}

/* ---------------- buttons ---------------- */
.btn{
  border:none;border-radius:12px;padding:.62rem 1.15rem;font-size:.92rem;font-weight:700;
  cursor:pointer;font-family:inherit;transition:transform .12s,box-shadow .15s,background .15s,border-color .15s;
}
.btn.primary{background:var(--grad);color:#fff;box-shadow:0 6px 18px color-mix(in srgb,var(--brand) 45%,transparent)}
.btn.primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 26px color-mix(in srgb,var(--brand) 55%,transparent)}
.btn.primary:active{transform:translateY(0)}
.btn.ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}
.btn.ghost:hover{color:var(--ink);border-color:var(--brand)}
.btn.big{width:100%;padding:.9rem;font-size:1.06rem;margin-top:.5rem}
.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}
.linkbtn{background:none;border:none;color:var(--brand);cursor:pointer;font:inherit;font-weight:600;text-decoration:underline}

/* ---------------- quiz ---------------- */
.quizbar{display:flex;align-items:center;gap:.9rem;margin-bottom:1rem}
.progress{flex:1;height:9px;background:var(--card2);border:1px solid var(--line);border-radius:20px;overflow:hidden}
.progress-fill{height:100%;width:0;background:var(--grad);border-radius:20px;transition:width .35s cubic-bezier(.21,.7,.35,1)}
.quiz-meta{font-size:.82rem;color:var(--muted);white-space:nowrap;font-weight:600}
.quiz-meta .timer{padding:.1rem .5rem;border-radius:8px;background:var(--card2)}
.quiz-meta .timer.danger{color:var(--bad);background:var(--bad-bg);font-weight:800;animation:pulse 1s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.55}}

.q-head{display:flex;gap:.45rem;flex-wrap:wrap;margin-bottom:1rem}
.chip{
  font-size:.71rem;font-weight:600;padding:.24rem .65rem;border-radius:20px;
  background:var(--card2);color:var(--muted);border:1px solid var(--line)
}
.chip.soft{opacity:.9}
.chip.official{background:var(--ok-bg);color:var(--ok);border-color:transparent}
.chip.unofficial{background:color-mix(in srgb,var(--warn) 14%,transparent);color:var(--warn);border-color:transparent}
.question-text{font-size:1.14rem;font-weight:700;line-height:1.65;margin-bottom:1.2rem;letter-spacing:-.01em;overflow-wrap:anywhere}

/* ---- shared context block (TM diagram / shared language definitions) ---- */
.q-context:empty{display:none}
.q-context{margin:0 0 1.1rem}
.ctx{
  border:1px solid var(--line);border-radius:14px;background:var(--card2);
  padding:.9rem 1rem;margin-bottom:.6rem
}
.ctx-title{font-size:.82rem;font-weight:800;color:var(--muted);margin-bottom:.55rem;letter-spacing:.01em}
.ctx-fig{margin:.2rem 0;text-align:center}
.ctx-fig figcaption{font-size:.76rem;color:var(--muted);margin-top:.4rem}
.ctx-text{font-size:.95rem;line-height:1.7}

/* ---- question figure / code snippet ---- */
.q-extras:empty{display:none}
.q-extras{margin:.1rem 0 .3rem}
.q-fig{margin:.4rem 0;text-align:center}
.q-img{
  max-width:100%;height:auto;display:block;margin:.4rem auto;
  border:1px solid var(--line);border-radius:10px;cursor:zoom-in;background:#fff
}
.rev .q-img{max-width:280px}
.opt .opt-img{max-width:100%;height:auto;display:block;border-radius:6px;background:#fff}
.rev .opt-img{max-width:240px;vertical-align:middle;border-radius:6px}
.opt-ltr{direction:ltr;unicode-bidi:isolate;display:inline-block;text-align:left;max-width:100%}

/* ---- math: native MathML, pre-rendered at build time (tools/render_math.js) ----
   Every <math> carries dir="ltr"; the wrappers isolate it from the RTL paragraph.
   color:inherit keeps it readable in dark mode; the font stack prefers real math fonts. */
math{color:inherit;font-family:"Cambria Math","STIX Two Math","Latin Modern Math","Noto Sans Math",math;
  font-size:1.08em;direction:ltr}
/* \overline: build rewrites KaTeX's <mover>+U+203E (Chrome draws it as a stub) to mrow.ovl */
math .ovl{border-top:.065em solid currentColor;padding-top:.07em;margin-top:.06em}
.math-inline{direction:ltr;unicode-bidi:isolate;display:inline-block;vertical-align:middle;
  max-width:100%;overflow-x:auto;overflow-y:hidden;line-height:1.2;padding:.12em 0}
.math-block{display:block;direction:ltr;unicode-bidi:isolate;text-align:center;
  overflow-x:auto;overflow-y:hidden;max-width:100%;margin:.55rem 0;padding:.35rem .2rem;
  -webkit-overflow-scrolling:touch}
.math-block math{font-size:1.12em}
.opt-math{direction:ltr;unicode-bidi:isolate;display:inline-block}
/* a chain of inline formulas joined by punctuation ("$a$, $b$") stays in reading order; a line-final "." / ";" sits inside it */
.math-run{direction:rtl;unicode-bidi:isolate;display:inline;text-align:start}
.math-run>.math-inline{max-width:calc(100% - 1.1em)}
@media(max-width:560px){.expl .math-inline math,.rev .math-inline math,.qpeek-exp .math-inline math{font-size:.9em}.opt .opt-math math{font-size:.92em}.opt .opt-math{overflow-x:auto}}
.opt .opt-math math{font-size:1.14em}
.feedback .math-block,.ctx .math-block{background:color-mix(in srgb,var(--ink) 4%,transparent);border-radius:8px}

.ctx-note{font-size:.9rem;color:var(--muted);margin-top:.45rem;padding-inline:.1rem}
.ctx-note strong{color:var(--ink)}

/* inline code token inside stems / explanations (LTR-isolated) */
.tok{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;direction:ltr;
  unicode-bidi:isolate;background:var(--card2);border:1px solid var(--line);
  border-radius:5px;padding:.02em .34em;font-size:.88em;white-space:normal;overflow-wrap:anywhere}   /* a long token (an error message, a signature) wraps instead of running off a phone screen */

.options-list{display:flex;flex-direction:column;gap:.6rem}
.opt{
  display:flex;gap:.75rem;align-items:flex-start;text-align:right;width:100%;
  border:1.5px solid var(--line);background:var(--card2);color:var(--ink);
  border-radius:13px;padding:.8rem .95rem;cursor:pointer;font-size:.97rem;font-family:inherit;
  transition:border-color .13s,background .13s,transform .13s,box-shadow .13s;
}
.opt:hover:not(:disabled){border-color:var(--brand);transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.opt .key{
  flex:none;width:1.7rem;height:1.7rem;border-radius:9px;
  background:color-mix(in srgb,var(--ink) 8%,transparent);
  display:grid;place-items:center;font-weight:800;font-size:.85rem;color:var(--muted);
  transition:background .13s,color .13s
}
.opt .txt{padding-top:.12rem;flex:1;min-width:0}
.opt .orig-key{flex:none;align-self:center;font-size:.72rem;font-weight:700;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;padding:.1rem .5rem;white-space:nowrap}
.opt.correct{border-color:var(--ok);background:var(--ok-bg)}
.opt.correct .key{background:var(--ok);color:#04231a}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.opt.wrong .key{background:var(--bad);color:#2a0a0f}
.opt.chosen-exam{border-color:transparent;background:color-mix(in srgb,var(--brand) 14%,var(--card2));box-shadow:var(--ring)}
.opt.chosen-exam .key{background:var(--grad);color:#fff}
.opt:disabled{cursor:default}

.feedback{
  margin-top:1.1rem;border-radius:13px;padding:.9rem 1.1rem;font-size:.9rem;
  border:1px solid var(--line);animation:rise .25s ease both
}
.feedback.good{background:var(--ok-bg);border-color:color-mix(in srgb,var(--ok) 55%,transparent)}
.feedback.bad{background:var(--bad-bg);border-color:color-mix(in srgb,var(--bad) 55%,transparent)}
.feedback .verdict{font-weight:800;margin-bottom:.35rem;font-size:1rem}
.feedback.good .verdict{color:var(--ok)} .feedback.bad .verdict{color:var(--bad)}
.feedback .expl{color:var(--ink)}
.feedback .note{display:block;margin-top:.55rem;font-size:.77rem;color:var(--muted)}

.quizfoot{display:flex;align-items:center;gap:.6rem;margin-top:1.2rem}
.streak{flex:1;font-size:.85rem;color:var(--muted);font-weight:600}

/* ---------------- results ---------------- */
.results-summary{display:flex;gap:1.4rem;flex-wrap:wrap;align-items:center;margin-bottom:1.4rem}
.scorering{
  --p:0;width:128px;height:128px;border-radius:50%;display:grid;place-items:center;flex:none;
  background:conic-gradient(var(--brand) calc(var(--p)*1%), var(--line) 0);
  box-shadow:var(--shadow-sm)
}
.scorering span{
  width:100px;height:100px;border-radius:50%;background:var(--card-solid);
  display:grid;place-items:center;font-size:1.6rem;font-weight:900;color:var(--ink)
}
.results-summary .txt{font-size:.95rem}
.results-summary .txt b{font-size:1.2rem;font-weight:800}

.bytopic{display:flex;flex-direction:column;gap:.55rem;margin-bottom:1.2rem}
.tline{display:grid;grid-template-columns:135px 1fr 56px;gap:.7rem;align-items:center;font-size:.85rem}
.tbar{height:10px;background:var(--card2);border-radius:20px;overflow:hidden}
.tbar i{display:block;height:100%;background:var(--grad);border-radius:20px}

.review{display:flex;flex-direction:column;gap:.7rem}
.rev{border:1px solid var(--line);border-radius:13px;padding:.8rem 1rem;font-size:.88rem;background:var(--card2)}
.rev.ok{border-right:4px solid var(--ok)}
.rev.bad{border-right:4px solid var(--bad)}
.rev .rq{font-weight:700;margin-bottom:.35rem}
.rev .ra{color:var(--muted);font-size:.82rem}
.rev .ra .good{color:var(--ok);font-weight:600} .rev .ra .miss{color:var(--bad);font-weight:600}
.rev .ctx{padding:.6rem .7rem}

/* ---------------- footer ---------------- */
.appfoot{
  max-width:860px;margin:0 auto 2.2rem;padding:0 1rem;color:var(--muted);font-size:.78rem;
  display:flex;gap:.5rem;flex-wrap:wrap;align-items:center
}
.disclaimer{flex-basis:100%;opacity:.8}
/* back to the study-tools deck */
/* Back to the study-tools deck. Deliberately the one warm spot in the footer —
   as muted fine print it read as a disclaimer and got missed. The pre-color-mix
   declarations are the old look, kept as a fallback for older browsers. */
.deck-link{
  margin-top:.55rem;
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.55rem 1.05rem;border-radius:999px;
  border:1px solid var(--line);
  border:1px solid color-mix(in oklab, var(--brand) 45%, transparent);
  background:transparent;
  background:color-mix(in oklab, var(--brand) 14%, transparent);
  color:var(--ink);text-decoration:none;
  font-size:.86rem;font-weight:600;line-height:1.4;
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease
}
.deck-link:hover,.deck-link:focus-visible{
  border-color:var(--brand);
  background:color-mix(in oklab, var(--brand) 24%, transparent);
  box-shadow:0 6px 18px -8px var(--brand);
  transform:translateY(-1px)
}
.deck-link .deck-arrow{
  color:var(--brand);font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;
  width:1.35em;height:1.35em;border-radius:50%;
  background:color-mix(in oklab, var(--brand) 22%, transparent);
  transition:transform .18s ease
}
.deck-link:hover .deck-arrow,.deck-link:focus-visible .deck-arrow{transform:translate(2px,-2px)}
@media (prefers-reduced-motion: reduce){
  .deck-link,.deck-link .deck-arrow{transition:none}
  .deck-link:hover,.deck-link:focus-visible{transform:none}
  .deck-link:hover .deck-arrow,.deck-link:focus-visible .deck-arrow{transform:none}
}


/* ---------------- learning section ---------------- */
.learn-entry{font-size:.84rem;padding:.45rem .8rem;white-space:nowrap}

#screen-learn{max-width:1040px;margin-inline:auto}
.learn-bar{display:flex;align-items:center;gap:.8rem;margin-bottom:1rem}
.learn-progress{flex:1;height:7px;background:var(--card2);border:1px solid var(--line);border-radius:20px;overflow:hidden}
#learnProgressFill{height:100%;width:0;background:var(--grad);border-radius:20px;transition:width .3s ease}
.learn-toc-toggle{display:none}

.learn-layout{display:grid;grid-template-columns:240px 1fr;gap:1rem;align-items:start}

.learn-toc{
  position:sticky;top:5rem;display:flex;flex-direction:column;gap:.2rem;
  background:var(--card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);
  padding:.6rem;max-height:calc(100vh - 6.5rem);overflow:auto
}
.learn-toc button{
  text-align:right;border:none;background:transparent;color:var(--muted);font:inherit;font-size:.86rem;
  padding:.5rem .7rem;border-radius:10px;cursor:pointer;transition:background .12s,color .12s;line-height:1.35
}
.learn-toc button:hover{background:var(--card2);color:var(--ink)}
.learn-toc button.active{background:color-mix(in srgb,var(--brand) 16%,var(--card2));color:var(--ink);font-weight:700}

.learn-content{padding:1.6rem 1.8rem;min-height:60vh;animation:rise .3s ease both;
  min-width:0;overflow-wrap:anywhere;word-break:break-word}
.learn-content h2.learn-h{font-size:1.5rem;font-weight:800;margin-bottom:1rem;
  padding-bottom:.7rem;border-bottom:1px solid var(--line)}
.learn-content h3{font-size:1.08rem;color:var(--ink);font-weight:700;margin:1.5rem 0 .5rem}
.learn-content p{margin:.6rem 0;color:var(--ink)}
.learn-content ul,.learn-content ol{margin:.5rem 0;padding-inline-start:1.4rem;display:flex;flex-direction:column;gap:.3rem}
.learn-content li{line-height:1.6}
.learn-content li::marker{color:var(--brand)}
.learn-content strong{color:var(--ink);font-weight:800}
.learn-content code{
  font-family:"Consolas",ui-monospace,monospace;font-size:.86em;direction:ltr;display:inline-block;
  background:var(--card2);border:1px solid var(--line);border-radius:6px;padding:.05em .4em
}
.learn-content pre{background:var(--card2);border:1px solid var(--line);border-radius:10px;padding:.8rem 1rem;overflow:auto;direction:ltr}
.learn-content pre code{border:none;background:none;padding:0}
.learn-content hr{border:none;border-top:1px solid var(--line);margin:1.2rem 0}
.learn-content a{color:var(--brand)}
.learn-content table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.86rem;overflow:hidden;
  border-radius:10px;border:1px solid var(--line)}
.learn-content th,.learn-content td{border:1px solid var(--line);padding:.5rem .7rem;text-align:right}
.learn-content thead th{background:var(--card2);color:var(--ink);font-weight:800}
.learn-content tbody tr:nth-child(even){background:var(--card2)}

/* --- exam-technique briefs (learn-briefs.js) --- */
.learn-content h4{font-size:.98rem;color:var(--ink);font-weight:800;margin:1.1rem 0 .4rem}
.learn-content h5{font-size:.92rem;color:var(--muted);font-weight:800;margin:.9rem 0 .35rem}
.learn-note{
  margin:.9rem 0;padding:.7rem .95rem;background:var(--card2);
  border:1px solid var(--line);border-inline-start:3px solid var(--brand);
  border-radius:var(--radius-xs)
}
.learn-note>:first-child{margin-top:0}
.learn-note>:last-child{margin-bottom:0}
.learn-note h3,.learn-note h4,.learn-note h5{margin-top:.2rem}
.learn-note table{font-size:.82rem}
.learn-math{margin:.9rem 0;text-align:center;overflow-x:auto;overflow-y:hidden}
.learn-content ul.learn-check{padding-inline-start:.2rem;list-style:none;gap:.42rem}
.learn-content ul.learn-check li{
  position:relative;padding-inline-start:1.5rem;line-height:1.55;color:var(--ink)
}
.learn-content ul.learn-check li::before{
  content:"☐";position:absolute;inset-inline-start:0;top:-.05em;
  color:var(--brand);font-size:1.05em
}
.learn-tablewrap{overflow-x:auto;margin:1rem 0}
.learn-tablewrap>table{margin:0;min-width:100%}

.learn-figs{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:.9rem;margin-top:1.4rem}
.learn-fig{margin:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--card2);
  display:flex;flex-direction:column}
.learn-fig img{width:100%;height:auto;display:block;cursor:zoom-in;background:#0b1020;transition:transform .2s}
.learn-fig img:hover{transform:scale(1.02)}
.learn-fig figcaption{padding:.55rem .7rem;font-size:.78rem;color:var(--muted);text-align:center;border-top:1px solid var(--line)}

.learn-foot{display:flex;align-items:center;gap:.6rem;margin-top:1.1rem}
.learn-pos{flex:1;text-align:center;font-size:.84rem;color:var(--muted);font-weight:600}

/* lightbox */
.lightbox{position:fixed;inset:0;z-index:70;display:grid;place-items:center;padding:2rem;
  background:rgba(4,6,16,.82);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);animation:rise .2s ease both}
.lightbox img{max-width:96vw;max-height:92vh;border-radius:12px;box-shadow:var(--shadow);background:#fff}
.lightbox-close{position:absolute;top:1rem;left:1rem;width:2.6rem;height:2.6rem;border-radius:50%;
  border:1px solid var(--line);background:var(--card);color:var(--ink);font-size:1.1rem;cursor:pointer}
.lightbox-close:hover{border-color:var(--brand)}

/* ---------------- responsive ---------------- */
@media(max-width:860px){
  .learn-entry{padding:.45rem .7rem}
  .learn-layout{grid-template-columns:1fr}
  .learn-toc-toggle{display:inline-block}
  .learn-toc{display:none;position:static;width:auto;max-height:none;margin-bottom:.9rem;top:auto}
  .learn-toc.open{display:flex}
  .learn-toc button{font-size:.92rem;padding:.6rem .8rem}
  .learn-backdrop{display:none !important}
}
@media(max-width:560px){
  .topbar{flex-direction:column;align-items:stretch;gap:.55rem;padding:.7rem .9rem}
  .brand{gap:.55rem;min-width:0}
  .brand>div{min-width:0}
  .brand .sub{display:none}
  .brand h1{font-size:1.05rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .logo{width:2.1rem;height:2.1rem;font-size:1.05rem;border-radius:11px;flex:none}
  .topbar-right{flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:.4rem}
  .topstats{flex-wrap:nowrap;gap:.35rem}
  .stat{padding:.2rem .5rem;font-size:.66rem;border-radius:10px}
  .stat b{font-size:.8rem}
  .learn-entry{padding:.42rem .7rem;font-size:.82rem;flex:none}
  .theme-toggle{width:2.1rem;height:2.1rem;font-size:1rem;flex:none}
  main{margin:1rem auto}
  .card{padding:1.2rem 1.1rem}
  .modes{grid-template-columns:1fr}
  .results-summary{justify-content:center;text-align:center}
  .scorering{width:108px;height:108px}.scorering span{width:84px;height:84px;font-size:1.35rem}
  .tline{grid-template-columns:95px 1fr 48px;gap:.5rem;font-size:.8rem}
  .learn-content{padding:1.2rem 1.1rem}
  .learn-content h2.learn-h{font-size:1.3rem}
  .learn-figs{grid-template-columns:1fr}
}

/* ---------------- quiz additions ---------------- */
.logo{background:none;box-shadow:none;overflow:hidden}
.logo img{width:100%;height:100%;display:block;border-radius:inherit}
.chip.lowconf{background:color-mix(in srgb,var(--bad) 13%,transparent);color:var(--bad);border-color:transparent}
.feedback .expl:empty{display:none}
.feedback .expl-none{color:var(--muted);font-size:.85rem}
.feedback .accept-note{display:block;margin-top:.45rem;font-size:.8rem;color:var(--ink);font-weight:600}
.opt .txt{overflow-wrap:anywhere;line-height:1.6}
.ctx-fig .q-img{margin:.2rem auto}
.empty-state{text-align:center;padding:1.2rem .6rem;border:1px dashed var(--line-strong);
  border-radius:var(--radius-sm);margin:0 0 1.1rem;color:var(--muted)}
.empty-state strong{display:block;color:var(--ink);font-size:1.05rem;margin-bottom:.3rem}
.rev .rq{overflow-wrap:anywhere}
.rev .ra .or{margin:0 .35rem;color:var(--muted);font-weight:400}
@media(max-width:560px){
  /* long Hebrew topic labels: label + score on one row, bar full-width below */
  .tline{grid-template-columns:minmax(0,1fr) auto;row-gap:.3rem}
  .tline .tbar{grid-column:1/-1;grid-row:2}
}

/* ================= learn mode: briefs (docs/briefs -> tools/build_learn.py -> learn.js) =========== */
/* chapter title sits beside its "drill this topic" entry point */
.learn-head{display:flex;align-items:center;gap:1rem;margin-bottom:1rem;
  padding-bottom:.7rem;border-bottom:1px solid var(--line);flex-wrap:wrap}
.learn-head h2.learn-h{margin:0;padding:0;border:none;flex:1;min-width:0}
.learn-kind{display:inline-block;font-size:.72rem;font-weight:800;color:var(--brand2);
  border:1px solid color-mix(in srgb,var(--brand2) 40%,transparent);border-radius:20px;
  padding:.05em .6em;margin-inline-start:.5rem;vertical-align:middle}
.learn-drill{white-space:nowrap;font-size:.86rem;padding:.5rem .9rem;flex:none}
.learn-drill .n{display:inline-block;margin-inline-start:.35rem;padding:.05em .45em;border-radius:20px;
  background:rgba(255,255,255,.22);font-size:.82em;font-weight:800}
.learn-toc button.cheat{font-style:normal}
.learn-toc button.cheat::before{content:"📋 "}

/* section headings from the briefs' "## " structure */
.learn-content h2:not(.learn-h){font-size:1.2rem;font-weight:800;color:var(--ink);
  margin:2rem 0 .7rem;padding-inline-start:.7rem;border-inline-start:4px solid var(--brand);line-height:1.4}
.learn-content h2:not(.learn-h):first-child{margin-top:.4rem}

/* cross-reference to another chapter */
.xref{color:var(--brand);cursor:pointer;text-decoration:underline;text-underline-offset:2px}
.xref:hover{color:var(--brand2)}

/* a question id: click to peek at the real question */
.qref{
  font-family:"Consolas",ui-monospace,monospace;font-size:.84em;direction:ltr;unicode-bidi:isolate;
  background:color-mix(in srgb,var(--brand) 13%,transparent);color:var(--brand);
  border:1px solid color-mix(in srgb,var(--brand) 34%,transparent);
  border-radius:6px;padding:.08em .45em;margin-inline:.1em;cursor:pointer;font-weight:700;
  white-space:nowrap;transition:background .12s,color .12s,border-color .12s
}
.qref:hover,.qref:focus-visible{background:var(--brand);color:var(--brand-ink);border-color:transparent}

/* auto-generated "שאלות מבחן בנושא" list */
.learn-qs{margin-top:2.2rem;padding-top:.4rem;border-top:1px dashed var(--line-strong)}
.learn-qs-note,.learn-qs-empty{font-size:.84rem;color:var(--muted) !important}
.learn-content ul.learn-qs-list{list-style:none;padding:0;gap:.5rem}
.learn-qs-list li{display:flex;flex-wrap:wrap;align-items:baseline;gap:.35rem .6rem;
  padding:.5rem .7rem;border:1px solid var(--line);border-radius:10px;background:var(--card2)}
.learn-qs-exam{font-weight:700;font-size:.88rem;min-width:7.5rem}
.learn-qs-btns{display:flex;flex-wrap:wrap;gap:.3rem}
.learn-qs-btns .qref{font-family:inherit;direction:rtl;font-size:.8rem;margin:0}

/* tables scroll inside their own box so a wide one never stretches the page */
.tbl-wrap{overflow-x:auto;margin:1.1rem 0;border:1px solid var(--line);border-radius:10px;
  -webkit-overflow-scrolling:touch}
.learn-content .tbl-wrap table{margin:0;border:none;border-radius:0;
  min-width:calc(var(--cols,3) * 5.5rem)}
.learn-content .tbl-wrap th,.learn-content .tbl-wrap td{
  border-inline:none;overflow-wrap:break-word;word-break:normal;vertical-align:top}
.learn-content .tbl-wrap th{white-space:nowrap}

/* callouts: the briefs' emoji vocabulary, one colour per meaning */
.learn-content blockquote.cal{
  margin:1.1rem 0;padding:.75rem 1rem;border-radius:12px;
  background:var(--card2);border:1px solid var(--line);
  border-inline-start:4px solid var(--muted)
}
.learn-content blockquote.cal>*:first-child{margin-top:0}
.learn-content blockquote.cal>*:last-child{margin-bottom:0}
.cal-trap{border-inline-start-color:color-mix(in srgb,var(--warn) 60%,var(--bad)) !important;
  background:color-mix(in srgb,var(--warn) 11%,transparent) !important}
.cal-alarm{border-inline-start-color:var(--bad) !important;background:var(--bad-bg) !important}
.cal-warn{border-inline-start-color:var(--warn) !important;
  background:color-mix(in srgb,var(--warn) 8%,transparent) !important}
.cal-key{border-inline-start-color:var(--brand2) !important;
  background:color-mix(in srgb,var(--brand2) 12%,transparent) !important}
.cal-tip{border-inline-start-color:var(--brand) !important;
  background:color-mix(in srgb,var(--brand) 9%,transparent) !important}
.cal-yes{border-inline-start-color:var(--ok) !important;background:var(--ok-bg) !important}
.cal-no{border-inline-start-color:var(--bad) !important;background:var(--bad-bg) !important}

/* math inside briefs */
.learn-content .math-block{margin:1rem 0;padding:.8rem .6rem;
  background:var(--card2);border:1px solid var(--line);border-radius:12px}
.learn-content .math-inline{vertical-align:middle}
.learn-content .tbl-wrap .math-inline{white-space:nowrap;max-width:none;overflow:visible}
/* edge shadow marking a box whose content runs past its sides */
.math-block.scrollable,.tbl-wrap.scrollable{
  box-shadow:inset 15px 0 11px -12px var(--scroll-hint),
             inset -15px 0 11px -12px var(--scroll-hint)}
.learn-content .math-fail{color:var(--bad)}

/* ---- question peek (opened from a `26B-B-Q3` chip inside a brief) ---- */
.qpeek{position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:1.5rem;
  background:rgba(4,6,16,.78);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  animation:rise .18s ease both}
.qpeek.hidden{display:none}
.qpeek-panel{width:min(700px,100%);max-height:88vh;display:flex;flex-direction:column;
  background:var(--card-solid);border:1px solid var(--line-strong);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;min-width:0}
.qpeek-head{display:flex;align-items:center;gap:.45rem;flex-wrap:wrap;
  padding:.9rem 1.1rem;border-bottom:1px solid var(--line);background:var(--card2)}
.chip.mono{font-family:"Consolas",ui-monospace,monospace;direction:ltr;unicode-bidi:isolate;font-weight:700}
.qpeek-close{margin-inline-start:auto;width:2.1rem;height:2.1rem;border-radius:50%;flex:none;
  border:1px solid var(--line);background:transparent;color:var(--ink);font-size:.95rem;cursor:pointer}
.qpeek-close:hover{border-color:var(--brand);color:var(--brand)}
.qpeek-body{padding:1.1rem;overflow:auto;flex:1;min-width:0;overflow-wrap:anywhere}
.qpeek-q{font-size:1.02rem;font-weight:700;line-height:1.65;color:var(--ink);margin-bottom:.9rem}
.qpeek-opts{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.45rem}
.qpeek-opts li{display:flex;gap:.6rem;align-items:flex-start;line-height:1.55;min-width:0;
  padding:.6rem .75rem;border:1px solid var(--line);border-radius:10px;background:var(--card2);font-size:.92rem}
.qpeek-opts li.right{border-color:transparent;background:var(--ok-bg);
  box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--ok) 55%,transparent)}
.qpeek-opts li.right .key{background:var(--ok);color:var(--brand-ink)}
.qpeek-opts .key{flex:none;width:1.5rem;height:1.5rem;border-radius:7px;display:grid;place-items:center;
  background:var(--card-solid);border:1px solid var(--line);font-size:.78rem;font-weight:800}
.qpeek-opts .txt{min-width:0;overflow-wrap:anywhere}
.qpeek-exp{margin-top:.95rem;padding:.75rem .9rem;border-radius:10px;font-size:.9rem;line-height:1.65;
  background:var(--card2);border:1px solid var(--line);color:var(--ink)}
.qpeek-foot{padding:.8rem 1.1rem;border-top:1px solid var(--line);background:var(--card2);
  display:flex;justify-content:flex-end}
.qpeek .q-img{max-width:100%;border-radius:10px}

@media(max-width:860px){
  .learn-head{gap:.7rem}
  .learn-drill{width:100%;justify-content:center}
}
@media(max-width:560px){
  .qpeek{padding:.6rem}
  .qpeek-panel{max-height:94vh}
  .qpeek-body{padding:.9rem}
  .learn-qs-exam{min-width:0;flex-basis:100%}
}

/* ---------------- guided courses ("צריך עזרה?", course-ui.js) ---------------- */
.crs-entry{font-size:.84rem;padding:.45rem .8rem;white-space:nowrap}
.crs-promos{display:grid;grid-template-columns:1fr;gap:.8rem;margin-bottom:1.1rem;scroll-margin-top:6rem}
@media(min-width:760px){ .crs-promos:has(.crs-promo:nth-child(2)){grid-template-columns:1fr 1fr} }
.crs-promo{display:flex;align-items:center;gap:1rem;cursor:pointer;margin-bottom:0;
  border:1.5px dashed color-mix(in srgb,var(--brand) 55%,transparent);
  background:color-mix(in srgb,var(--brand) 8%,var(--card));transition:transform .15s,border-color .15s;padding:1rem 1.1rem}
.crs-promo:hover{transform:translateY(-2px);border-color:var(--brand)}
.crs-promo .big-ico{font-size:2rem;flex:none}
.crs-promo b{display:block;font-size:1.02rem}
.crs-promo span{color:var(--muted);font-size:.84rem}
.crs-promo .go{margin-inline-start:auto;flex:none;color:#fff}
.crs-head{display:flex;align-items:center;gap:.8rem;margin-bottom:1rem}
.crs-head .grow{flex:1}
.crs-head .sub{font-size:.88rem;line-height:1.6;margin-top:.3rem}
.crs-overall{font-size:.85rem;color:var(--muted);font-weight:600}
.crs-overall .crs-done{margin:.6rem 0}
.crs-overall .btn{margin-top:.2rem}
.crs-map{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:.7rem;margin-top:1rem}
.crs-lvl{position:relative;display:flex;flex-direction:column;gap:.25rem;text-align:right;font:inherit;color:var(--ink);cursor:pointer;
  border:1.5px solid var(--line);background:var(--card2);border-radius:14px;padding:.85rem 1rem;transition:border-color .15s,transform .15s}
.crs-lvl:hover{border-color:var(--brand);transform:translateY(-2px)}
.crs-lvl .num{font-size:.72rem;font-weight:800;color:var(--muted)}
.crs-lvl .ttl{font-weight:800;font-size:1rem}
.crs-lvl .gl{font-size:.8rem;color:var(--muted);line-height:1.4}
.crs-lvl .st{font-size:.75rem;font-weight:700;margin-top:.2rem;color:var(--muted)}
.crs-lvl.passed{border-color:color-mix(in srgb,var(--ok) 55%,transparent);background:color-mix(in srgb,var(--ok) 8%,var(--card2))}
.crs-lvl.passed .st{color:var(--ok)}
.crs-lvl.next{box-shadow:var(--ring);border-color:transparent}
.crs-lvl.next::after{content:"מומלץ הבא";position:absolute;top:.6rem;left:.7rem;font-size:.66rem;font-weight:800;
  background:var(--grad);color:var(--brand-ink,#fff);padding:.12rem .5rem;border-radius:20px}
.crs-lvl.boss{grid-column:1/-1;background:color-mix(in srgb,var(--warn) 9%,var(--card2));border-color:color-mix(in srgb,var(--warn) 45%,transparent)}

/* lesson card: typography for the authored lesson html (self-contained) */
.crs-lesson{min-height:0;min-width:0;overflow-wrap:anywhere;padding:1.6rem 1.8rem}
.crs-lesson h2.learn-h{font-size:1.45rem;font-weight:800;margin:.6rem 0 1rem;padding-bottom:.7rem;border-bottom:1px solid var(--line)}
.crs-lesson .crs-goal{font-size:.9rem;margin:-.6rem 0 1rem}
.crs-lesson .lesson-body{line-height:1.75}
.crs-lesson .lesson-body h3{font-size:1.08rem;color:var(--ink);font-weight:700;margin:1.4rem 0 .5rem}
.crs-lesson .lesson-body p{margin:.6rem 0}
.crs-lesson .lesson-body ul,.crs-lesson .lesson-body ol{margin:.5rem 0;padding-inline-start:1.4rem}
.crs-lesson .lesson-body li{line-height:1.65;margin:.2rem 0}
.crs-lesson .lesson-body li::marker{color:var(--brand)}
.crs-lesson .lesson-body code,.question-text code,.feedback code,.crs-review code{
  font-family:Consolas,ui-monospace,monospace;font-size:.88em;direction:ltr;unicode-bidi:isolate;
  background:var(--card2);border:1px solid var(--line);border-radius:6px;padding:.05em .4em}
.crs-lesson .lesson-body pre{background:var(--card2);border:1px solid var(--line);border-radius:10px;padding:.8rem 1rem;overflow:auto;direction:ltr}
.crs-lesson .lesson-body pre code{border:none;background:none;padding:0}
.crs-lesson .tbl-wrap{overflow-x:auto;margin:1rem 0;border:1px solid var(--line);border-radius:10px;-webkit-overflow-scrolling:touch}
.crs-lesson .tbl-wrap table{width:100%;border-collapse:collapse;font-size:.88rem;margin:0}
.crs-lesson th,.crs-lesson td{border:1px solid var(--line);padding:.45rem .7rem;text-align:right;overflow-wrap:break-word}
.crs-lesson .tbl-wrap th,.crs-lesson .tbl-wrap td{border-inline:none}
.crs-lesson thead th{background:var(--card2);font-weight:800;white-space:nowrap}
.crs-lesson .math-block{margin:1rem 0;padding:.8rem .6rem;background:var(--card2);border:1px solid var(--line);border-radius:12px;overflow-x:auto}
.crs-lesson .math-inline{vertical-align:middle}
.crs-lesson .learn-fig{margin:1rem 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--card2)}
.crs-lesson .learn-fig img{width:100%;height:auto;display:block;cursor:zoom-in}
.crs-lesson .learn-fig figcaption{padding:.5rem .7rem;font-size:.78rem;color:var(--muted);text-align:center;border-top:1px solid var(--line)}
.lesson-rule{border-inline-start:3px solid var(--brand);background:var(--card2);border-radius:10px;padding:.6rem .9rem;margin:.8rem 0}
.lesson-trap{border-inline-start:3px solid var(--warn);background:color-mix(in srgb,var(--warn) 8%,var(--card2));border-radius:10px;padding:.6rem .9rem;margin:.8rem 0}
.lesson-ex{border:1px dashed color-mix(in srgb,var(--ok) 55%,transparent);background:color-mix(in srgb,var(--ok) 6%,transparent);border-radius:12px;padding:.6rem .9rem;margin:.8rem 0}
.lesson-formula{direction:ltr;text-align:center;font-family:"Cambria Math","STIX Two Math",Cambria,"Times New Roman",serif;font-size:1.08rem;
  background:var(--card2);border:1px solid var(--line);border-radius:10px;padding:.55rem .8rem;margin:.6rem 0;overflow-x:auto;white-space:nowrap}
.crs-note{margin-top:1.2rem;font-size:.78rem;color:var(--muted)}
.crs-actions{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1.1rem}
.crs-actions .btn{flex:1 1 auto}
.crs-sum{text-align:center}
.crs-sum .big{font-size:2.6rem;font-weight:900;margin:.4rem 0}
.crs-sum .msg{color:var(--muted);margin-bottom:.6rem}
.crs-review{text-align:right;background:var(--card2);border:1px solid var(--line);border-radius:12px;padding:.7rem 1rem;margin:.8rem 0;font-size:.9rem;line-height:1.6}
.crs-review-t{font-weight:800;margin-bottom:.3rem}
.question-text b,.feedback b{font-weight:800}
bdi.ltr{unicode-bidi:isolate}
bdi.ltr.nw{white-space:nowrap}   /* a short formula never splits across lines */
@media(max-width:560px){
  /* header gets a second row: [stats … theme] then [🧭 צריך עזרה? | 📖 מצב לימוד] */
  .topbar-right{flex-wrap:wrap}
  .topbar-right .topstats{order:1;flex:1 1 calc(100% - 3rem)}
  .topbar-right .theme-toggle{order:2}
  .topbar-right .crs-entry,.topbar-right .learn-entry{order:3;flex:1 1 calc(50% - .4rem);justify-content:center;padding:.42rem .7rem;font-size:.82rem}
  .crs-promo .go{display:none}
  .crs-map{grid-template-columns:1fr}
  .crs-lesson{padding:1.2rem 1.1rem}
}

/* fenced code block (``` ... ```): literal, LTR, left-aligned, scrolls sideways inside its own box */
pre.code-block{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;direction:ltr;
  unicode-bidi:isolate;text-align:left;white-space:pre;overflow-x:auto;max-width:100%;
  box-sizing:border-box;background:var(--card2);border:1px solid var(--line);border-radius:8px;
  padding:.6em .85em;margin:.5em 0;font-size:.88em;line-height:1.55;tab-size:4}
pre.code-block code{font:inherit;white-space:pre;direction:ltr;text-align:left;background:none;
  border:0;padding:0;border-radius:0}

/* inline figure inside rich text (a line of exactly ![alt](images/exams/<file>.png)) */
.rt-fig{margin:.7rem auto;max-width:100%;text-align:center}
.rt-fig img{display:block;max-width:100%;height:auto;margin:0 auto;border-radius:8px;
  background:#fff;cursor:zoom-in}
.rt-fig figcaption{margin-top:.3rem;font-size:.78rem;color:var(--muted);overflow-wrap:anywhere}