/* =====================================================================
   EXAM HUB — ACTIVITY CARD
   Every practice task uses the same frame, whatever the part:
     .act-head   kicker, title, instructions, tools (count, switch,
                 Present, Print)
     .act-progress  answered so far
     .act-body   the task itself (gap-fill text, questions, writing)
     .act-foot   Clear · result · the main action
     .act-why    explanations after marking
   ===================================================================== */
.act{
  position:relative;min-width:0;
  border-radius:var(--r-xl);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-2);overflow:clip;
}
.act-head{
  display:grid;gap:.9rem 2rem;padding:clamp(1.1rem,1rem + .8vw,1.6rem) clamp(1.1rem,1rem + 1.2vw,2rem) 1rem;
  background:linear-gradient(180deg,var(--teal-tint),#fff);
}
@media (min-width:900px){.act-head{grid-template-columns:minmax(0,1fr) auto;align-items:start}}
.act-id{display:grid;gap:.3rem;min-width:0}
.act-kicker{display:inline-flex;align-items:center;gap:.5rem;font-size:.74rem;font-weight:900;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-ink)}
.act-kicker::before{content:"";width:.5rem;height:.5rem;border-radius:2px;background:var(--teal)}
.act-title{font-size:clamp(1.35rem,1.15rem + .8vw,1.9rem);font-weight:900;line-height:1.12;letter-spacing:-.02em;color:var(--ink)}
.act-instr{font-size:.98rem;color:var(--fg-2);max-width:70ch;line-height:1.5}
.act-meta{display:inline-block;margin-left:.4rem;font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);white-space:nowrap}
.act-tools{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem}
@media (min-width:900px){.act-tools{justify-content:flex-end;max-width:34rem}}
.act-count{display:inline-flex;align-items:baseline;gap:.3rem;padding:.35rem .85rem;border-radius:var(--r-pill);font-size:.85rem;font-weight:700;color:var(--fg-2);background:#fff;box-shadow:inset 0 0 0 1.5px var(--line-strong);font-variant-numeric:tabular-nums;white-space:nowrap}
.act-count b{color:var(--teal-ink);font-weight:900;font-size:1rem}
.act-progress{height:4px;background:var(--bg-sunken)}
.act-progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--teal-bright),var(--teal-deep));transition:width .35s ease;border-radius:0 999px 999px 0}
.act-body{padding:clamp(1.1rem,1rem + 1.2vw,2rem) clamp(1.1rem,1rem + 1.6vw,2.5rem);min-width:0}
.act-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem 1rem;
  padding:1rem clamp(1.1rem,1rem + 1.2vw,2rem);border-top:1px solid var(--line);background:var(--bg-soft);
}
.act-status{flex:1;min-width:10rem;text-align:center;font-size:var(--fs-sm);color:var(--fg-2)}
.act-status .stars{margin-right:.4rem}
.act-total{font-size:1.35rem;font-weight:900;color:var(--teal-ink);margin-right:.35rem;font-variant-numeric:tabular-nums}

/* Stars for a result: 3 = 90%+, 2 = 70%+, 1 = 50%+ */
.stars{display:inline-flex;gap:2px;vertical-align:-.25em}
.stars svg{width:1.35rem;height:1.35rem}
.stars .on{fill:#FFC43D;stroke:#D99A00}
.stars .off{fill:#EAF3F2;stroke:#C5DFDC}
.stars.pop svg.on{animation:eh-pop .45s cubic-bezier(.3,.7,.4,1.5) both}
.stars.pop svg.on:nth-child(2){animation-delay:.12s}
.stars.pop svg.on:nth-child(3){animation-delay:.24s}

/* Explanations */
.act-why{padding:0 clamp(1.1rem,1rem + 1.2vw,2rem) clamp(1.1rem,1rem + 1vw,1.75rem);border-top:1px solid var(--line);background:#fff}
.act-why-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.5rem 1rem;padding:1.1rem 0 .8rem}
.act-why-head b{font-size:1.3rem;font-weight:900;color:var(--ink)}
.act-score{font-size:var(--fs-sm);color:var(--fg-3)}
.act-score b{font-size:1.45rem;color:var(--teal-ink)}
.act-why ol{list-style:none;margin:0;padding:0;display:grid;gap:.6rem}
@media (min-width:1200px){.act-why ol{grid-template-columns:1fr 1fr}}
.mw{display:grid;grid-template-columns:2rem 1fr;gap:.75rem;padding:.8rem .95rem;border-radius:var(--r-md);background:var(--bg-soft);border:1px solid var(--line);font-size:var(--fs-sm);line-height:1.5;color:var(--fg-2);transition:box-shadow .3s;animation:eh-rise .3s ease both}
.mw.is-flash{box-shadow:0 0 0 3px var(--teal)}
.mw-n{width:1.9rem;height:1.9rem;border-radius:50%;display:grid;place-items:center;font-weight:900;font-size:.95rem}
.mw.ok .mw-n{background:linear-gradient(180deg,var(--gelg-t),var(--gelg-b));color:var(--gelg-ink)}
.mw.bad .mw-n{background:linear-gradient(180deg,var(--gelc-t),var(--gelc-b));color:var(--gelc-ink)}
.mw-head{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem .6rem;margin-bottom:.2rem}
.mw-head .i{width:1rem;height:1rem}
.mw.ok .mw-head .i{color:var(--ok)}
.mw.bad .mw-head .i{color:var(--bad)}
.mw-head b{color:var(--fg)}
.mw-tag{font-size:.72rem;font-weight:800;padding:.12rem .55rem;border-radius:var(--r-pill);background:var(--bad-tint);color:var(--bad)}
.mw p+p{margin-top:.25rem}

/* ---------- Gap-fill: options sit inside the sentence ---------- */
.maze-body{font-family:var(--font-read);font-size:var(--fs-read);font-weight:400;line-height:2.45;color:var(--paper-fg);max-width:88rem}
.maze-body p{margin:0}
.maze-body p+p{margin-top:.8em}
.dropcap{float:left;font-family:var(--font-read);font-weight:700;font-size:4.1em;line-height:.8;margin:.1em .12em 0 -.02em;color:var(--teal-deep)}
.mz{
  display:inline-flex;flex-wrap:wrap;align-items:center;gap:.2rem;max-width:100%;
  margin:0 .1rem;padding:.18rem;vertical-align:middle;
  border-radius:12px;background:var(--bg-soft);box-shadow:inset 0 0 0 1px var(--line);
  font-family:var(--font-ui);font-size:.9rem;font-weight:600;line-height:1.2;transition:box-shadow .2s,background .2s;
}
.mz.is-picked{box-shadow:inset 0 0 0 1.5px var(--teal)}
.mz-n{
  display:inline-grid;place-items:center;min-width:1.55rem;height:1.55rem;margin:0 .1rem 0 .05rem;padding:0 .2rem;border-radius:50%;
  font-size:.8rem;font-weight:900;color:var(--gel-ink);background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.6);cursor:default;
}
.is-checked .mz-n{cursor:pointer}
.mz-o{
  position:relative;display:inline-flex;align-items:baseline;gap:.28rem;padding:.32rem .62rem;border-radius:9px;
  color:var(--fg-2);text-align:left;background:linear-gradient(180deg,#fff,#F4FBFA);box-shadow:0 0 0 1px var(--line),0 2px 0 var(--gelw-lip);
  transition:background .15s,color .15s,box-shadow .15s,transform .1s;
}
.mz-o i{font-style:normal;font-weight:900;color:var(--teal-ink)}
.mz-o:hover:not(:disabled){color:var(--fg);box-shadow:0 0 0 1.5px var(--teal),0 2px 0 var(--gelw-lip)}
.mz-o:active:not(:disabled){transform:translateY(2px);box-shadow:0 0 0 1px var(--line)}
.mz-o[aria-checked="true"]{color:var(--gel-ink);font-weight:800;background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.65),0 2px 0 var(--gel-lip)}
.mz-o[aria-checked="true"] i{color:var(--gel-ink)}
.mz-o:disabled{cursor:default}
.mz.is-right{background:var(--ok-tint);box-shadow:inset 0 0 0 1.5px var(--ok)}
.mz.is-wrong{background:var(--bad-tint);box-shadow:inset 0 0 0 1.5px var(--bad);animation:eh-shake .4s ease}
.mz.is-right .mz-n{background:linear-gradient(180deg,var(--gelg-t),var(--gelg-b));color:var(--gelg-ink)}
.mz.is-wrong .mz-n{background:linear-gradient(180deg,var(--gelc-t),var(--gelc-b));color:var(--gelc-ink)}
.mz-o.is-correct,.mz-o.is-answer{color:var(--gelg-ink);font-weight:800;background:linear-gradient(180deg,var(--gelg-t),var(--gelg-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 2px 0 var(--gelg-lip)}
.mz-o.is-answer{box-shadow:0 0 0 2px var(--ok),0 2px 0 var(--gelg-lip)}
.mz-o.is-correct i,.mz-o.is-answer i{color:var(--gelg-ink)}
.mz-o.is-correct{animation:eh-pop .4s cubic-bezier(.3,.7,.4,1.5)}
.mz-o.is-wrong{color:var(--gelc-ink);font-weight:700;text-decoration:line-through;text-decoration-thickness:2px;background:linear-gradient(180deg,var(--gelc-t),var(--gelc-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.5),0 2px 0 var(--gelc-lip)}
.mz-o.is-wrong i{color:var(--gelc-ink)}
.mz-o.is-dim{opacity:.45;box-shadow:0 0 0 1px var(--line)}
@media (max-width:560px){
  .maze-body{line-height:2.05}
  .mz{display:flex;width:100%;margin:.4rem 0;padding:.3rem;gap:.3rem}
  .mz-n{align-self:center}
  .mz-o{flex:1 1 0;min-width:0;justify-content:center;flex-direction:column;align-items:center;gap:.05rem;padding:.45rem .3rem;text-align:center;line-height:1.2}
  .dropcap{font-size:3.3em}
}

/* ---------- Multiple choice (reading, drills) ---------- */
.quiz-grid{display:grid;gap:1.5rem;min-width:0}
.quiz-text,.quiz-side{display:grid;gap:1rem;align-content:start;min-width:0}
@media (min-width:1000px){
  .quiz-grid.is-split{grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);align-items:start}
  .quiz-grid.is-split .quiz-text{position:sticky;top:calc(env(safe-area-inset-top,0px) + 6rem);max-height:calc(100vh - 7.5rem);overflow:auto;scrollbar-width:thin;padding-right:.35rem}
}
.quiz-text .paper{box-shadow:none;background:var(--bg-soft)}
.quiz-text .passage p.is-focus{background:#fff;box-shadow:0 0 0 2px var(--teal);border-radius:8px;padding:.3rem .5rem;margin-inline:-.5rem}
.qs{display:grid;gap:.85rem;min-width:0}
.q{display:grid;gap:.7rem;padding:1rem 1.1rem 1.1rem;border-radius:var(--r-lg);background:#fff;border:1px solid var(--line);transition:box-shadow .2s,border-color .2s}
.q.is-focus{border-color:var(--teal);box-shadow:0 0 0 3px var(--teal-soft)}
.q-head{display:flex;align-items:flex-start;gap:.75rem}
.q-num{flex:none;width:2rem;height:2rem;border-radius:50%;display:grid;place-items:center;font-weight:900;font-size:.95rem;color:var(--gel-ink);background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 2px 0 var(--gel-lip)}
.q-stem{font-weight:700;line-height:1.45;padding-top:.2rem;flex:1;min-width:0}
.q-skill{flex:none}
.q-opts{display:grid;gap:.45rem}
@media (max-width:560px){.q-head{flex-wrap:wrap}.q-skill{margin-left:2.75rem}}
.qs.is-compact{grid-template-columns:repeat(auto-fill,minmax(min(100%,30rem),1fr));align-items:start}
.qs.is-compact .q-opts{display:flex;flex-wrap:wrap;gap:.45rem}
.qs.is-compact .opt{width:auto;padding:.35rem .9rem .35rem .35rem;font-size:var(--fs-sm)}
.qs.is-compact .bubble{width:1.75rem;height:1.75rem;font-size:.85rem}
.q-hint{display:flex;gap:.5rem;align-items:flex-start;padding:.5rem .75rem;border-radius:var(--r-sm);background:var(--sun-soft);font-size:var(--fs-sm);color:var(--fg)}
.q-hint .i{color:var(--sun-ink);margin-top:.15rem}
.why-slot:empty{display:none}
.gloss{padding:1rem 1.15rem;border-radius:var(--r-lg);background:var(--sun-soft);font-size:var(--fs-sm)}
.gloss-head{display:flex;align-items:center;gap:.5rem;margin-bottom:.6rem;color:var(--sun-ink)}
.gloss-head b{color:var(--fg)}
.gloss-head .ar-inline{margin-left:auto;font-size:.85rem;color:var(--fg-3)}
.gloss dl{margin:0;display:grid;gap:.35rem}
.gloss dl>div{display:grid;grid-template-columns:minmax(6rem,auto) 1fr;gap:.75rem;align-items:baseline}
.gloss dt{font-weight:800;color:var(--fg)}
.gloss dd{margin:0;color:var(--fg-2)}
.gloss dd .ar-inline{display:block;color:var(--fg-3);font-size:.92rem}

/* ---------- Set switcher: Text 1 · Text 2 · Text 3 ---------- */
.paper-tabs{display:flex;gap:.65rem;overflow-x:auto;padding:.2rem .2rem .55rem;scrollbar-width:thin}
.paper-tab{
  position:relative;isolation:isolate;overflow:hidden;
  flex:1 0 14rem;max-width:26rem;display:grid;grid-template-columns:1fr auto;gap:.15rem .75rem;align-items:center;text-align:left;
  padding:.8rem 1rem;border-radius:var(--r-lg);background:linear-gradient(180deg,#fff,#F4FBFA);
  box-shadow:0 0 0 1px var(--line),0 3px 0 var(--gelw-lip);transition:transform .12s,box-shadow .2s;
}
.paper-tab:hover{box-shadow:0 0 0 1.5px var(--teal),0 3px 0 var(--gelw-lip)}
.paper-tab:active{transform:translateY(2px);box-shadow:0 0 0 1px var(--line),0 1px 0 var(--gelw-lip)}
.paper-tab[aria-selected="true"]{background:linear-gradient(180deg,var(--teal-tint),var(--teal-soft));box-shadow:0 0 0 2px var(--teal),0 3px 0 var(--gel-lip)}
.pt-n{grid-column:1;font-size:.7rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase;color:var(--teal-ink)}
.pt-title{grid-column:1;font-weight:800;font-size:var(--fs-sm);line-height:1.3;color:var(--fg);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.pt-best,.pt-new{grid-column:2;grid-row:1 / span 2;font-size:.74rem;font-weight:900;padding:.22rem .6rem;border-radius:var(--r-pill);white-space:nowrap}
.pt-best{background:var(--ok-tint);color:var(--ok);font-variant-numeric:tabular-nums}
.pt-new{background:var(--sun-soft);color:var(--sun-ink)}
.paper-stage{min-width:0}
.score-slot:empty{display:none}

/* ---------- Levels: what Foundation and Excellence change ---------- */
.act-level{display:inline-flex;align-items:center;gap:.45rem;width:fit-content;margin-top:.35rem;padding:.3rem .75rem;border-radius:var(--r-pill);font-size:.8rem;font-weight:700;line-height:1.3}
.act-level .i{width:1rem;height:1rem;flex:none}
.act-level.lv-f{background:var(--sun-soft);color:#5A3B00}
.act-level.lv-f b{display:inline-grid;place-items:center;width:1.15rem;height:1.15rem;border-radius:50%;background:var(--sun);color:var(--gels-ink);font-size:.75rem}
.act-level.lv-e{background:var(--violet-soft);color:#3B2470;box-shadow:inset 0 0 0 1px #D9CDF2;transition:transform .12s}
.act-level.lv-e:hover{box-shadow:inset 0 0 0 1.5px var(--violet)}
.act-level.lv-e:active{transform:translateY(1px)}

/* Foundation hints: open on purpose */
.mz{position:relative}
.mz-hint{display:inline-grid;place-items:center;width:1.45rem;height:1.45rem;margin-left:.1rem;border-radius:50%;font-weight:900;font-size:.8rem;color:var(--gels-ink);background:linear-gradient(180deg,var(--gels-t),var(--gels-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 2px 0 var(--gels-lip);transition:transform .12s}
.mz-hint:active{transform:translateY(2px);box-shadow:none}
.mz-hint[aria-expanded="true"]{box-shadow:0 0 0 3px var(--sun-soft),0 2px 0 var(--gels-lip)}
.mz-tip{position:absolute;z-index:6;left:0;top:calc(100% + 6px);width:max-content;max-width:min(24rem,80vw);padding:.6rem .8rem;border-radius:12px;background:#FFFBEA;box-shadow:0 0 0 1px #F5DE9E,var(--shadow-2);font-family:var(--font-ui);font-size:.88rem;font-weight:600;line-height:1.45;color:var(--fg);white-space:normal;animation:eh-rise .2s ease both}
.mz-tip::before{content:"";position:absolute;top:-6px;left:1.1rem;width:10px;height:10px;transform:rotate(45deg);background:#FFFBEA;box-shadow:-1px -1px 0 #F5DE9E}
@media (max-width:560px){.mz-tip{position:static;width:auto;max-width:none;flex-basis:100%;margin-top:.3rem}.mz-tip::before{display:none}}

/* Second try */
.mz.is-retry{background:var(--sun-soft);box-shadow:inset 0 0 0 1.5px var(--sun);animation:eh-shake .4s ease}
.mz-o.is-struck,.opt.is-struck{opacity:.45;text-decoration:line-through;text-decoration-thickness:2px;text-decoration-color:var(--bad);box-shadow:0 0 0 1px var(--line);cursor:not-allowed}
.mz.is-second{background:linear-gradient(90deg,var(--ok-tint),var(--sun-soft));box-shadow:inset 0 0 0 1.5px var(--ok)}
.mw.half .mw-n{background:linear-gradient(180deg,var(--gels-t),var(--gels-b));color:var(--gels-ink)}
.mw-tag.mw-second{background:var(--sun-soft);color:var(--sun-ink)}
.q-hint-btn{display:inline-flex;align-items:center;gap:.3rem;flex:none;padding:.3rem .7rem;border-radius:var(--r-pill);font-size:.8rem;font-weight:800;color:var(--gels-ink);background:linear-gradient(180deg,var(--gels-t),var(--gels-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 2px 0 var(--gels-lip);transition:transform .12s}
.q-hint-btn .i{width:.95rem;height:.95rem}
.q-hint-btn:active{transform:translateY(2px);box-shadow:none}
.q-hint-btn[aria-expanded="true"]{opacity:.7}
.q.is-retry{border-color:var(--sun);box-shadow:0 0 0 3px var(--sun-soft)}
.q.is-done{opacity:.85}
.why.half{background:linear-gradient(90deg,var(--ok-tint),var(--sun-soft))}

/* Excellence: exam conditions */
.act-timer{display:inline-flex;align-items:center;gap:.4rem;padding:.35rem .85rem;border-radius:var(--r-pill);font-size:.9rem;font-weight:800;color:#3B2470;background:var(--violet-soft);box-shadow:inset 0 0 0 1px #D9CDF2;font-variant-numeric:tabular-nums}
.act-timer b{font-weight:900}
.is-timed .act-timer{color:#fff;background:linear-gradient(180deg,#8A6BD1,#5B3B9A);box-shadow:0 2px 0 #3B2470}
.act-timer.is-low{color:var(--gelc-ink);background:linear-gradient(180deg,var(--gelc-t),var(--gelc-b));box-shadow:0 2px 0 var(--gelc-lip);animation:pres-pulse 1s ease infinite}
.act-timer.is-done{color:var(--ok);background:var(--ok-tint);box-shadow:none;animation:none}
@keyframes pres-pulse{50%{opacity:.6}}
.act.is-gated .act-body{position:relative;min-height:18rem}
.act.is-gated .act-body>*:not(.act-gate){filter:blur(7px);opacity:.35;pointer-events:none;user-select:none}
.act-gate{position:absolute;inset:0;z-index:5;display:grid;justify-items:center;align-items:start;padding:clamp(1.5rem,1rem + 3vw,3.5rem) 1rem 1rem}
.gate-card{display:grid;gap:.7rem;justify-items:center;text-align:center;max-width:34rem;padding:1.6rem 1.8rem;border-radius:var(--r-xl);background:#fff;box-shadow:0 0 0 1px var(--line),var(--shadow-3)}
.gate-card b{font-size:1.3rem;font-weight:900;color:var(--ink)}
.gate-card p{color:var(--fg-2);font-size:var(--fs-sm)}
.gate-ic{width:3.2rem;height:3.2rem;border-radius:50%;display:grid;place-items:center;color:#fff;background:linear-gradient(180deg,#8A6BD1,#5B3B9A);box-shadow:0 3px 0 #3B2470}
.gate-ic .i{width:1.6rem;height:1.6rem}