/* ============================================================
   Automata Quiz — modern theme (teal/sky identity).
   Dark by default; [data-theme] drives manual light/dark toggle.
   Built on the data-science-quiz stylesheet; class & --var names
   are kept stable (app.js relies on them) and extended for the
   richer Databases content: shared context blocks, quiz-side data
   tables, SQL code options (highlighted), and KaTeX math options.
   ============================================================ */

:root{
  /* surfaces */
  --bg:#0a0c18; --bg2:#12112b;
  --glow-a:rgba(45,212,191,.20); --glow-b:rgba(56,189,248,.16);
  --card:rgba(26,28,56,.72); --card2:rgba(255,255,255,.045);
  --card-solid:#181a33;
  /* text */
  --ink:#eaedff; --muted:#9aa0cf;
  /* lines & accents */
  --line:rgba(255,255,255,.09); --line-strong:rgba(255,255,255,.16);
  --brand:#2dd4bf; --brand2:#38bdf8; --brand-ink:#0a0c18;
  --grad:linear-gradient(135deg,#2dd4bf 0%,#38bdf8 100%);
  --ok:#34d399; --ok-bg:rgba(52,211,153,.13);
  --bad:#fb7185; --bad-bg:rgba(251,113,133,.13);
  --warn:#fbbf24;
  /* SQL syntax tokens (dark) */
  --tok-kw:#c792ea; --tok-str:#7ee787; --tok-num:#f2cc60;
  --tok-com:#8b93b8; --tok-fn:#79c0ff; --tok-op:#ff9e64; --tok-punct:#c9d1e9;
  /* 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 rgba(45,212,191,.32);

  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:#eef0fb; --bg2:#e7e6fb;
  --glow-a:rgba(13,148,136,.22); --glow-b:rgba(2,132,199,.16);
  --card:rgba(255,255,255,.82); --card2:rgba(30,20,80,.04);
  --card-solid:#ffffff;
  --ink:#171533; --muted:#5a5a8a;
  --line:rgba(30,20,80,.10); --line-strong:rgba(30,20,80,.18);
  --brand:#0d9488; --brand2:#0284c7; --brand-ink:#ffffff;
  --grad:linear-gradient(135deg,#0d9488 0%,#0284c7 100%);
  --ok:#0f9d68; --ok-bg:rgba(15,157,104,.12);
  --bad:#e5484d; --bad-bg:rgba(229,72,77,.10);
  --tok-kw:#8250df; --tok-str:#0a7d33; --tok-num:#953800;
  --tok-com:#6e7781; --tok-fn:#0550ae; --tok-op:#b35900; --tok-punct:#24292f;
  --shadow:0 14px 40px rgba(60,50,120,.16);
  --shadow-sm:0 4px 16px rgba(60,50,120,.10);
  --ring:0 0 0 3px rgba(13,148,136,.25);
  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:#eef0fb; --bg2:#e7e6fb;
    --glow-a:rgba(13,148,136,.22); --glow-b:rgba(2,132,199,.16);
    --card:rgba(255,255,255,.82); --card2:rgba(30,20,80,.04);
    --card-solid:#ffffff;
    --ink:#171533; --muted:#5a5a8a;
    --line:rgba(30,20,80,.10); --line-strong:rgba(30,20,80,.18);
    --brand:#0d9488; --brand2:#0284c7; --brand-ink:#ffffff;
    --grad:linear-gradient(135deg,#0d9488 0%,#0284c7 100%);
    --ok:#0f9d68; --ok-bg:rgba(15,157,104,.12);
    --bad:#e5484d; --bad-bg:rgba(229,72,77,.10);
    --tok-kw:#8250df; --tok-str:#0a7d33; --tok-num:#953800;
    --tok-com:#6e7781; --tok-fn:#0550ae; --tok-op:#b35900; --tok-punct:#24292f;
    --shadow:0 14px 40px rgba(60,50,120,.16);
    --shadow-sm:0 4px 16px rgba(60,50,120,.10);
    --ring:0 0 0 3px rgba(13,148,136,.25);
    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.part{background:color-mix(in srgb,var(--brand) 16%,transparent);color:var(--brand);border-color:transparent;font-weight:700}
.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:1.18rem;font-weight:700;line-height:1.5;margin-bottom:1.2rem;white-space:pre-wrap;letter-spacing:-.01em}

/* ---- shared context block (ERD image / schema tables / R,S data / FD set) ---- */
.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{white-space:pre-wrap;font-size:.95rem}
.ctx-math{margin:.3rem 0;overflow-x:auto}
.ctx-tables{display:flex;flex-wrap:wrap;gap:.8rem}

/* quiz-side data tables (LTR: relation schema, R/S data) */
.dbtable{margin:0;max-width:100%;overflow-x:auto}
.dbtable table{border-collapse:collapse;font-size:.82rem;direction:ltr;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  border:1px solid var(--line);border-radius:8px;overflow:hidden}
.dbtable caption{font-weight:800;font-size:.8rem;color:var(--ink);text-align:left;padding:.1rem .2rem .35rem;caption-side:top}
.dbtable th,.dbtable td{border:1px solid var(--line);padding:.32rem .6rem;text-align:left;white-space:nowrap}
.dbtable thead th{background:color-mix(in srgb,var(--brand) 12%,var(--card2));color:var(--ink);font-weight:800}
.dbtable th.pk{text-decoration:underline}
.dbtable tbody tr:nth-child(even){background:var(--card2)}
.dbtable figcaption{font-size:.74rem;color:var(--muted);text-align:left;margin-top:.3rem}

/* ---- question figure / code snippet ---- */
.q-extras:empty{display:none}
.q-extras{margin:.1rem 0 .3rem}
.q-code,.opt-code{
  direction:ltr;text-align:left;background:var(--card-solid);color:var(--ink);
  border:1px solid var(--line);border-radius:10px;padding:.7rem .9rem;margin:.4rem 0;
  overflow-x:auto;white-space:pre;font-size:.85rem;line-height:1.5;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace
}
.opt-code{margin:0;font-size:.82rem;width:100%}
.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-code{font-size:.78rem}
.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}
.opt-math{direction:ltr;unicode-bidi:isolate;display:inline-block}
.math-fallback{font-family:ui-monospace,Consolas,monospace;background:var(--card2);
  border:1px solid var(--line);border-radius:6px;padding:.05em .4em;font-size:.9em}

/* SQL syntax highlight tokens */
.sql-kw{color:var(--tok-kw);font-weight:700}
.sql-str{color:var(--tok-str)}
.sql-num{color:var(--tok-num)}
.sql-com{color:var(--tok-com);font-style:italic}
.sql-fn{color:var(--tok-fn)}
.sql-op{color:var(--tok-op)}
.sql-punct{color:var(--tok-punct)}

/* ---- relational-algebra / FD notation (self-rendered, themeable, Hebrew-safe) ---- */
.alg{direction:ltr;unicode-bidi:isolate;font-family:"Cambria Math","STIX Two Math",Cambria,Georgia,serif;line-height:1.75}
.alg sub,.alg sup{font-size:.72em;line-height:0}
.alg sub{vertical-align:-.35em}
.alg sup{vertical-align:.55em}
.alg bdi{font-family:"Segoe UI","Assistant","Arial Hebrew",system-ui,sans-serif}
.alg-block{display:block;margin:.55rem 0;text-align:center;font-size:1.18em;overflow-x:auto}
.opt-algebra{display:block;max-width:100%;overflow-x:auto}
.opt-algebra .alg{white-space:normal;overflow-wrap:break-word;font-size:1.02em;line-height:2.1}
.ctx-algebra{margin:.3rem 0}

/* ---- relation schema with underlined keys (solid = key, dashed = weak/partial key) ---- */
.schema{direction:ltr;unicode-bidi:isolate;display:inline-block;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95em}
.schema .pk{text-decoration:underline;text-underline-offset:3px}
.schema .ppk{text-decoration:underline dashed;text-underline-offset:3px}
.opt-schema{display:inline-block}
.opt-schema .schema{font-size:.92rem}

/* ---- relation-template context (stacked cards: schema on top, Hebrew meaning below) ---- */
.ctx-schemas{display:flex;flex-direction:column;gap:.5rem;margin:.3rem 0}
.rel-item{border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--card2)}
.rel-item>.rel{background:var(--card-solid);padding:.5rem .7rem;direction:ltr;overflow-x:auto}
.rel-item>.rel .schema{display:block;white-space:normal;font-size:.9rem;line-height:1.7}
.rel-item>.mean{padding:.45rem .7rem;font-size:.85rem;color:var(--muted);white-space:pre-line;line-height:1.55;border-top:1px solid var(--line)}
.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:nowrap}

.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.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}
.rev .opt-code{font-size:.76rem}

/* ---------------- 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-content .katex-display{overflow-x:auto;overflow-y:hidden;padding-bottom:.25rem}

.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:50;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}
}

/* ============================================================
   Automata additions: build-time MathML (no KaTeX CSS/fonts),
   HTML transition tables, diagram figures.
   ============================================================ */
math{font-family:"Cambria Math","STIX Two Math","Latin Modern Math",math,serif;font-size:1.08em}
math[display="block"]{display:block;margin:.35rem 0}
.math-block{direction:ltr;text-align:center;overflow-x:auto;overflow-y:hidden;margin:.45rem 0;padding:.15rem 0}
.question-text math,.expl math{unicode-bidi:isolate}
.opt-math math{font-size:1.12em}
.tbl-wrap{overflow-x:auto;margin:.4rem 0}
.ctx-table{border-collapse:collapse;margin:0 auto;font-size:.95rem}
.ctx-table th,.ctx-table td{border:1px solid var(--line-strong);padding:.3rem .65rem;text-align:center}
.ctx-table th{background:var(--card2)}
.q-fig{margin:.2rem 0 1rem;text-align:center}
.q-fig .q-img,.ctx-fig .q-img{background:#fff;border-radius:10px;padding:.45rem;max-width:min(100%,560px);height:auto;cursor:zoom-in}
.opt .txt strong{font-weight:800}
.math-lines{direction:ltr;display:table;margin:.45rem auto;text-align:left;line-height:1.75}
.math-lines math{font-size:1.1em}
.nobr{white-space:nowrap}

/* ============ learn briefs + question peek (ported from machine-learning-quiz) ============ */
/* ---- exam briefs (docs/briefs -> 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-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}

/* the "39 שאלות · תווית באפליקציה: KNN" strip under the title */
.brief-meta{font-size:.84rem;color:var(--muted);line-height:1.75;
  background:var(--card2);border:1px solid var(--line);border-radius:12px;
  padding:.7rem .9rem;margin:0 0 1.3rem !important}
.brief-meta strong{color:var(--muted);font-weight:700}

/* section headings generated from the briefs' own "## " / "### " structure */
.learn-content h2:not(.learn-h){font-size:1.22rem;font-weight:800;color:var(--ink);
  margin:2.1rem 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 brief, and a pointer to a doc we don't ship */
.xref{color:var(--brand);cursor:pointer;text-decoration:underline;text-underline-offset:2px}
.xref:hover{color:var(--brand2)}
.xref-dead{color:var(--muted);opacity:.72}

/* 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;
  transition:background .12s,color .12s,border-color .12s
}
.qref:hover,.qref:focus-visible{background:var(--brand);color:var(--brand-ink);border-color:transparent}

/* tables scroll inside their own box so a wide one never stretches the page.
   --cols comes from the builder, so narrow tables never scroll needlessly. */
.learn-content .tbl-wrap{overflow-x:auto;margin:1.1rem 0;border:1px solid var(--line);border-radius:10px;
  -webkit-overflow-scrolling:touch}
/* width:100% already fills the box; the min-width only bites when a table has enough
   columns that wrapping would crush them (~5+), which is when scrolling beats wrapping. */
.learn-content .tbl-wrap table{margin:0;border:none;border-radius:0;
  min-width:calc(var(--cols,3) * 5.5rem)}
/* .learn-content sets overflow-wrap:anywhere for long LTR tokens in prose; inside a
   table that lets the browser crush a column to one character and split Hebrew words
   mid-word ("שאלות" -> "שאלו/ת"). Cells break only between words; if the row still
   doesn't fit, .tbl-wrap scrolls instead. */
.learn-content .tbl-wrap th,.learn-content .tbl-wrap td{
  border-inline:none;overflow-wrap:break-word;word-break:normal}
.learn-content .tbl-wrap th{white-space:nowrap}
.learn-content .tbl-wrap tr>*:first-child{border-inline-start:none}
.learn-content .tbl-wrap tr>*:last-child{border-inline-end:none}

/* 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}
.learn-content blockquote.cal h3{margin-top:.2rem}

/* checklists ("צ׳קליסט לפני המבחן") */
/* block, not flex: in a flex <li> every inline child (<b>, a bidi isolate) became its own flex item */
.learn-content li.task{list-style:none;display:block;position:relative;padding-inline-start:1.6rem;margin-inline-start:-1rem}
.learn-content li.task .box{position:absolute;inset-inline-start:0;top:.28em;width:1.05em;height:1.05em;border-radius:5px;
  border:2px solid var(--line-strong);background:var(--card2)}
.learn-content li.task.done .box{background:var(--ok);border-color:var(--ok)}
.learn-content li.task.done .box::after{content:"✓";position:absolute;inset:0;display:grid;place-items:center;
  color:var(--brand-ink);font-size:.8em;font-weight:900}

/* MathML, rendered to static markup at build time */
.math-inline{direction:ltr;unicode-bidi:isolate;display:inline-block;vertical-align:baseline}
.learn-content .math-block{display:block;direction:ltr;overflow-x:auto;overflow-y:hidden;
  margin:1.1rem 0;padding:.85rem .6rem;text-align:center;
  background:var(--card2);border:1px solid var(--line);border-radius:12px;
  -webkit-overflow-scrolling:touch}
.learn-content .math-block math{font-size:1.16em}
.math-inline math{font-size:1.04em}

/* edge shadow marking a box whose content runs past its sides. inset shadows are
   painted against the padding box, so they stay put while the content scrolls. */
.math-block.scrollable,.tbl-wrap.scrollable{
  box-shadow:inset 15px 0 11px -12px var(--scroll-hint,rgba(0,0,0,.35)),
             inset -15px 0 11px -12px var(--scroll-hint,rgba(0,0,0,.35))}
.learn-content .math-fail{color:var(--bad)}

/* figures */
.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}

/* ---- question peek (opened from a `24S-C-Q7` 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-panel{width:min(680px,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}
.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}
.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;
  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:560px){
  .learn-content{padding:1.2rem 1.1rem}
  .learn-content h2.learn-h{font-size:1.3rem}
  .learn-content h2:not(.learn-h){font-size:1.1rem;margin:1.7rem 0 .6rem}
  .learn-content h3{font-size:1rem}
  .learn-content blockquote.cal{padding:.65rem .8rem;margin:.9rem 0}
  .brief-meta{font-size:.79rem;padding:.6rem .75rem}
  .learn-content .math-block{padding:.7rem .45rem;margin:.9rem 0}
  .learn-content table{font-size:.8rem}
  .learn-content th,.learn-content td{padding:.42rem .55rem}
  /* peek becomes a bottom sheet: reachable by thumb, full width */
  .qpeek{padding:0;place-items:end stretch}
  .qpeek-panel{width:100%;max-height:92vh;border-radius:var(--radius) var(--radius) 0 0;
    border-inline:none;border-bottom:none;animation:sheet .22s ease both}
  .qpeek-head,.qpeek-body,.qpeek-foot{padding-inline:.9rem}
  .qpeek-foot .btn{width:100%}
}
@keyframes sheet{from{transform:translateY(14%);opacity:.6}to{transform:none;opacity:1}}
/* a long inline formula is emitted as several <math> pieces with <wbr> between them
   (build_questions.split_inline) so it can wrap at a relation symbol on phones */
.mwrap{direction:ltr;unicode-bidi:isolate}
.nobr .mwrap{white-space:normal}
.opt .txt{min-width:0}
.math-wrapd{white-space:normal;line-height:2;overflow-x:visible}
.math-wrapd math{font-size:1.12em}

/* bidi isolates (bidi.js): a formula inside Hebrew keeps its left-to-right order */
bdi.ltr{unicode-bidi:isolate;overflow-wrap:anywhere}
bdi.ltr.nw{white-space:nowrap}
/* a formula wider than its line scrolls inside its own box (markWide in app.js) */
.math-lines.wide,.mwrap.wide,.nobr.wide,.math-inline.wide{display:block;max-width:100%;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch}

/* ---------------- guided courses ("צריך עזרה?") ---------------- */
.crs-entry{font-size:.84rem;padding:.45rem .8rem;white-space:nowrap}
.crs-promos{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;margin-bottom:1.1rem;scroll-margin-top:6rem}
.crs-promos .crs-promo{margin-bottom:0}
.crs-promo{display:flex;align-items:center;gap:1rem;cursor:pointer;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-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:#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)}
.crs-lesson{min-height:0}
.crs-lesson .crs-goal{font-size:.9rem;margin:-.6rem 0 1rem}
.crs-lesson .lesson-body{line-height:1.75}
.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-rule>:first-child,.lesson-trap>:first-child,.lesson-ex>:first-child{margin-top:0}
.lesson-rule>:last-child,.lesson-trap>:last-child,.lesson-ex>:last-child{margin-bottom:0}
.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}
.feedback .qref,.crs-review .qref{font-size:.8em}
.crs-lesson .opt-ltr{display:inline}
@media(max-width:560px){
  /* header gets a second row: [stats … 🌙] 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-promos{grid-template-columns:1fr}
  .crs-map{grid-template-columns:1fr}
}