/* Chakrilab Exam — প্র্যাকটিস প্লেয়ার (CLPractice). পাবলিক পেজ ও পরীক্ষার্থী প্যানেল দুই জায়গাতেই চলে। */
.clp-host{--clp-p:var(--cl-primary,var(--p,#4338ca));--clp-pd:var(--cl-primary-600,var(--pd,#3730a3));--clp-ps:var(--cl-primary-50,var(--ps,#eef2ff));
  --clp-ink:var(--cl-ink,var(--ink,#0f172a));--clp-text:var(--cl-text,var(--ink2,#334155));--clp-mut:var(--cl-muted,var(--mut,#64748b));--clp-line:var(--cl-line,var(--line,#e2e8f0));
  --clp-ok:#059669;--clp-oks:#ecfdf5;--clp-bad:#dc2626;--clp-bads:#fef2f2;--clp-warn:#d97706;--clp-warns:#fffbeb;
  --clp-font:var(--cl-font,var(--font,"Hind Siliguri","Noto Sans Bengali",system-ui,sans-serif));
  display:block;max-width:100%}
.clp,.clp *,.clp *::before,.clp *::after,.clp-modal,.clp-modal *,.clp-zoom,.clp-zoom *{box-sizing:border-box}
.clp,.clp-modal,.clp-zoom{--clp-p:var(--cl-primary,var(--p,#4338ca));--clp-pd:var(--cl-primary-600,var(--pd,#3730a3));--clp-ps:var(--cl-primary-50,var(--ps,#eef2ff));
  --clp-ink:var(--cl-ink,var(--ink,#0f172a));--clp-text:var(--cl-text,var(--ink2,#334155));--clp-mut:var(--cl-muted,var(--mut,#64748b));--clp-line:var(--cl-line,var(--line,#e2e8f0));
  --clp-ok:#059669;--clp-oks:#ecfdf5;--clp-bad:#dc2626;--clp-bads:#fef2f2;--clp-warn:#d97706;--clp-warns:#fffbeb;
  --clp-font:var(--cl-font,var(--font,"Hind Siliguri","Noto Sans Bengali",system-ui,sans-serif))}
.clp{font-family:var(--clp-font);color:var(--clp-text);line-height:1.65;text-align:left;outline:none;width:100%}
.clp [hidden]{display:none!important}
.clp-muted{color:var(--clp-mut);font-size:.9rem}

/* ---- buttons / inputs */
.clp-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:9px 20px;border-radius:11px;border:1.5px solid transparent;font:inherit;font-weight:600;font-size:1rem;cursor:pointer;line-height:1.3;text-decoration:none;transition:background .15s,box-shadow .15s,transform .05s}
.clp-btn:active{transform:translateY(1px)}
.clp-btn:focus-visible,.clp-opt:focus-visible,.clp-chip:focus-visible,.clp-img:focus-visible,.clp-in:focus-visible{outline:3px solid color-mix(in srgb,var(--clp-p) 40%,transparent);outline-offset:2px}
.clp-primary{background:var(--clp-p);color:#fff;box-shadow:0 2px 8px color-mix(in srgb,var(--clp-p) 30%,transparent)}
.clp-primary:hover{background:var(--clp-pd)}
.clp-ghost{background:#fff;color:var(--clp-ink);border-color:var(--clp-line)}
.clp-ghost:hover{background:var(--clp-ps);border-color:color-mix(in srgb,var(--clp-p) 35%,var(--clp-line))}
.clp-lg{min-height:50px;padding:11px 26px;font-size:1.06rem;width:100%}
.clp-sm{min-height:36px;padding:5px 14px;font-size:.9rem}
.clp-btn:disabled,.clp-btn.busy{opacity:.65;cursor:progress}
.clp-btn.busy::after{content:"";width:16px;height:16px;border-radius:50%;border:2.5px solid currentColor;border-right-color:transparent;animation:clp-spin .7s linear infinite}
.clp-in{min-height:46px;padding:8px 12px;border:1.5px solid var(--clp-line);border-radius:10px;font:inherit;font-size:1rem;background:#fff;color:var(--clp-ink);max-width:100%}
.clp-in:focus{border-color:var(--clp-p)}
input.clp-in[type=number]{width:96px;text-align:center}

/* ---- start screen */
.clp-is-start{background:#fff;border:1px solid var(--clp-line);border-radius:16px;padding:22px;box-shadow:0 1px 2px rgba(15,23,42,.05),0 6px 20px rgba(15,23,42,.06)}
.clp-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:16px}
.clp-ico{flex:none;width:46px;height:46px;border-radius:13px;background:var(--clp-ps);color:var(--clp-p);display:flex;align-items:center;justify-content:center;font-size:1.4rem}
.clp-title{margin:0 0 2px;font-size:1.2rem;color:var(--clp-ink);line-height:1.35}
.clp-sub{margin:0;font-size:.93rem;color:var(--clp-mut)}
.clp-form{display:flex;flex-direction:column;gap:16px}
.clp-field>label{display:block;font-weight:600;color:var(--clp-ink);margin-bottom:6px;font-size:.95rem}
.clp-count{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.clp-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.clp-chip{min-height:38px;min-width:46px;padding:4px 14px;border-radius:999px;border:1.5px solid var(--clp-line);background:#fff;font:inherit;font-weight:600;color:var(--clp-text);cursor:pointer}
.clp-chip.on{background:var(--clp-p);border-color:var(--clp-p);color:#fff}
.clp-err{padding:10px 14px;border-radius:10px;background:var(--clp-bads);color:#991b1b;font-size:.94rem}
.clp-err a,.clp-note a,.clp-saved a{color:var(--clp-p);font-weight:600;text-decoration:underline}
.clp-errlinks{display:block;margin-top:4px}
.clp-note{padding:10px 14px;border-radius:10px;background:var(--clp-warns);color:#92400e;margin-bottom:14px;font-size:.94rem}

/* ---- run */
.clp-is-run,.clp-is-sum{background:#fff;border:1px solid var(--clp-line);border-radius:16px;padding:20px;box-shadow:0 1px 2px rgba(15,23,42,.05),0 6px 20px rgba(15,23,42,.06)}
.clp-top{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;margin-bottom:16px}
.clp-qn{font-weight:700;color:var(--clp-ink)}
.clp-score{margin-left:auto;font-size:.92rem;color:var(--clp-ok);font-weight:600}
.clp-bar{flex:1 0 100%;height:8px;border-radius:99px;background:var(--clp-line);overflow:hidden}
.clp-bar>i{display:block;height:100%;border-radius:99px;background:var(--clp-p);transition:width .3s}
.clp-bar.thin{flex:none;height:6px}
.clp-bar.low>i{background:var(--clp-bad)}.clp-bar.mid>i{background:var(--clp-warn)}
.clp-q{font-size:1.14rem;font-weight:600;color:var(--clp-ink);margin:0 0 16px;line-height:1.7;word-break:break-word}
.clp-rich{word-break:break-word}
.clp-rich p{margin:0 0 .6em}.clp-rich img{max-width:100%;height:auto}.clp-rich sub,.clp-rich sup{line-height:0}
.clp-rich table{border-collapse:collapse;max-width:100%;display:block;overflow-x:auto}.clp-rich td,.clp-rich th{border:1px solid var(--clp-line);padding:4px 8px}
.clp-rich .katex-display{overflow-x:auto;overflow-y:hidden;padding:4px 0}
.clp-img{display:block;max-width:100%;max-height:300px;width:auto;height:auto;margin:10px 0 0;border-radius:10px;border:1px solid var(--clp-line);background:#f8fafc;cursor:zoom-in;object-fit:contain}
.clp-oimg{max-height:150px;margin-top:6px}
.clp-opts{display:flex;flex-direction:column;gap:10px}
.clp-opt{display:flex;align-items:center;gap:12px;width:100%;min-height:52px;padding:10px 14px;text-align:left;background:#fff;border:1.5px solid var(--clp-line);border-radius:12px;font:inherit;font-size:1.02rem;color:var(--clp-ink);cursor:pointer;transition:border-color .12s,background .12s}
.clp-opt:hover:not(:disabled){border-color:var(--clp-p);background:var(--clp-ps)}
.clp-opt:disabled{cursor:default}
.clp-ol{flex:none;width:32px;height:32px;border-radius:50%;background:var(--clp-ps);color:var(--clp-p);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem}
.clp-ot{flex:1;min-width:0;word-break:break-word}
.clp-mk{flex:none;width:24px;height:24px;border-radius:50%;display:none;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;color:#fff}
.clp-opt.pending{border-color:var(--clp-p);background:var(--clp-ps);opacity:1}
.clp-opt.ok{border-color:var(--clp-ok);background:var(--clp-oks)}
.clp-opt.ok .clp-ol{background:var(--clp-ok);color:#fff}
.clp-opt.ok .clp-mk{display:flex;background:var(--clp-ok)}.clp-opt.ok .clp-mk::before{content:"✓"}
.clp-opt.bad{border-color:var(--clp-bad);background:var(--clp-bads)}
.clp-opt.bad .clp-ol{background:var(--clp-bad);color:#fff}
.clp-opt.bad .clp-mk{display:flex;background:var(--clp-bad)}.clp-opt.bad .clp-mk::before{content:"✕"}
.clp-opt.dim{opacity:.6}
.clp-fb{margin-top:14px;padding:12px 14px;border-radius:12px;border:1px solid var(--clp-line)}
.clp-fb.is-ok{background:var(--clp-oks);border-color:#a7f3d0;color:#065f46}
.clp-fb.is-bad{background:var(--clp-bads);border-color:#fecaca;color:#991b1b}
.clp-fb.is-err{background:var(--clp-warns);border-color:#fde68a;color:#92400e}
.clp-exp{margin-top:8px;padding-top:8px;border-top:1px dashed color-mix(in srgb,currentColor 25%,transparent);color:var(--clp-text);font-size:.98rem}
.clp-exp-l{display:inline-block;margin-right:6px;font-size:.78rem;font-weight:700;padding:1px 8px;border-radius:99px;background:#fff;color:var(--clp-p);border:1px solid var(--clp-line)}
.clp-exp .clp-rich{display:block;margin-top:4px}
.clp-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;justify-content:flex-end}
.clp-is-sum .clp-actions{justify-content:flex-start}
.clp-hint{margin:12px 0 0;font-size:.82rem;color:var(--clp-mut)}
@media (hover:none),(max-width:720px){.clp-hint{display:none}}

/* ---- summary */
.clp-wait{text-align:center;padding:40px 10px;color:var(--clp-mut)}
.clp-spin{width:34px;height:34px;border-radius:50%;border:3px solid var(--clp-line);border-top-color:var(--clp-p);animation:clp-spin .8s linear infinite;margin:0 auto 10px}
.clp-sum{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-bottom:12px}
.clp-ring{--c:var(--clp-p);flex:none;width:130px;height:130px;border-radius:50%;padding:11px;background:conic-gradient(var(--c) calc(var(--pct,0)*1%),var(--clp-line) 0)}
.clp-ring.t-great{--c:var(--clp-ok)}.clp-ring.t-good{--c:var(--clp-p)}.clp-ring.t-low{--c:var(--clp-warn)}
.clp-ring>div{width:100%;height:100%;border-radius:50%;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.2}
.clp-ring b{font-size:1.6rem;color:var(--clp-ink)}.clp-ring small{color:var(--clp-mut);font-size:.85rem}
.clp-sum-b{flex:1;min-width:220px}.clp-sum-b h3{margin:0 0 4px;font-size:1.3rem;color:var(--clp-ink)}.clp-sum-b p{margin:0 0 10px;color:var(--clp-mut)}
.clp-stats{display:flex;gap:10px;flex-wrap:wrap}
.clp-stats span{display:flex;flex-direction:column;align-items:center;min-width:76px;padding:8px 12px;border-radius:12px;font-size:.84rem;font-weight:600}
.clp-stats b{font-size:1.3rem;line-height:1.2}
.s-ok{background:var(--clp-oks);color:#047857}.s-bad{background:var(--clp-bads);color:#b91c1c}.s-skip{background:#f1f5f9;color:#475569}
.clp-saved{margin:8px 0 0;font-size:.92rem;color:var(--clp-ok)}.clp-saved.warn{color:var(--clp-warn)}
.clp-weak,.clp-review{margin-top:20px}
.clp-weak h4,.clp-review h4{margin:0 0 10px;font-size:1.05rem;color:var(--clp-ink)}
.clp-weaklist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.clp-weaklist li{padding:12px 14px;border:1px solid var(--clp-line);border-radius:12px;background:#fff}
.clp-wl-top{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-bottom:6px;color:var(--clp-ink)}
.clp-weaklist .clp-btn{margin-top:10px}
.clp-rv{border:1px solid var(--clp-line);border-radius:12px;margin-bottom:8px;background:#fff;overflow:hidden}
.clp-rv>summary{display:flex;gap:10px;padding:11px 14px;cursor:pointer;font-weight:600;color:var(--clp-ink);list-style:none}
.clp-rv>summary::-webkit-details-marker{display:none}
.clp-rv[open]>summary{background:var(--clp-ps)}
.clp-rvn{flex:none;width:26px;height:26px;border-radius:50%;background:var(--clp-bads);color:var(--clp-bad);display:flex;align-items:center;justify-content:center;font-size:.85rem}
.clp-rv>.clp-img,.clp-rv>.clp-rv-opts,.clp-rv>.clp-exp{margin-left:14px;margin-right:14px}
.clp-rv-opts{display:flex;flex-direction:column;gap:6px;margin-top:10px;margin-bottom:10px}
.clp-rv-o{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border-radius:9px;border:1px solid var(--clp-line)}
.clp-rv-o>span{flex:1;min-width:0}
.clp-rv-o small{flex:none;font-weight:700;font-size:.78rem}
.clp-rv-o.ok{background:var(--clp-oks);border-color:#a7f3d0}.clp-rv-o.ok small{color:var(--clp-ok)}
.clp-rv-o.bad{background:var(--clp-bads);border-color:#fecaca}.clp-rv-o.bad small{color:var(--clp-bad)}
.clp-rv>.clp-exp{margin-bottom:12px}

/* ---- modal (full-screen on small) */
.clp-modal{position:fixed;inset:0;z-index:100000;background:rgba(15,23,42,.62);display:flex;flex-direction:column;align-items:center;padding:0;overflow:hidden}
.clp-modal-bar{width:100%;max-width:760px;display:flex;justify-content:flex-end;padding:10px 12px 6px;flex:none}
.clp-modal-x{width:40px;height:40px;border-radius:50%;border:0;background:#fff;color:#0f172a;font-size:1.05rem;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.clp-modal-in{width:100%;max-width:760px;flex:1;min-height:0;overflow-y:auto;padding:0 12px 18px;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}
.clp-lock{overflow:hidden!important}
.clp-modal-in .clp-is-run,.clp-modal-in .clp-is-sum,.clp-modal-in .clp-is-start{box-shadow:var(--sh2,0 12px 40px rgba(15,23,42,.25))}

/* ---- zoom */
.clp-zoom{position:fixed;inset:0;z-index:100001;background:rgba(2,6,23,.88);display:flex;align-items:center;justify-content:center;padding:18px;cursor:zoom-out}
.clp-zoom img{max-width:100%;max-height:100%;object-fit:contain;border-radius:8px;background:#fff}
.clp-zoom-x{position:absolute;top:12px;right:12px;width:42px;height:42px;border-radius:50%;border:0;background:#fff;font-size:1.05rem;cursor:pointer}

@keyframes clp-spin{to{transform:rotate(360deg)}}
@media (max-width:520px){
  .clp-is-start,.clp-is-run,.clp-is-sum{padding:16px 14px;border-radius:14px}
  .clp-q{font-size:1.06rem}
  .clp-actions .clp-btn{flex:1 1 auto}
  .clp-ring{width:112px;height:112px}
  .clp-sum{gap:14px}
  .clp-modal-bar{padding-top:max(10px,env(safe-area-inset-top))}
}
@media (prefers-reduced-motion:reduce){.clp-bar>i{transition:none}.clp-btn.busy::after,.clp-spin{animation-duration:2s}}

/* ================= পরীক্ষার্থী প্যানেল (student.js) ================= */
.sx-cover{display:block;width:100%;max-height:300px;object-fit:cover;border-radius:12px;margin:0 0 14px;background:#f1f5f9}
.sx-desc{white-space:pre-line}
.sx-pub{margin-top:10px;word-break:break-all}
.sx-qimg{display:block;max-width:100%;max-height:320px;margin:12px 0 0;border-radius:10px;border:1px solid var(--line,#e2e8f0);cursor:zoom-in;object-fit:contain;background:#f8fafc}
.sx-oimg{display:block;max-width:100%;max-height:160px;margin-top:6px;border-radius:8px;border:1px solid var(--line,#e2e8f0);object-fit:contain;background:#fff}
.sx-ot{flex:1;min-width:0;text-align:left;word-break:break-word}
.sx-ot .clp-rich{display:inline}
.q-text .clp-rich{display:block}
.q-text .katex-display,.sx-ot .katex-display,.qexp .katex-display{overflow-x:auto;overflow-y:hidden}
.sx-payfields[hidden]{display:none}
.sx-old{margin-right:6px;font-weight:400}
.sx-cpn{margin:4px 0 16px}
.sx-cpn .lbl{display:block;font-weight:600;margin-bottom:6px}
.sx-cpn-row{display:flex;gap:8px;flex-wrap:wrap}
.sx-cpn-row .in{flex:1 1 180px;min-width:0}
.sx-cpn-msg{margin-top:6px;min-height:1.2em}
.sx-cpn-ok{color:#047857;font-weight:600;display:inline-flex;gap:4px;align-items:center}
.sx-cpn-err{color:#b91c1c}
.sx-pr-host{margin:14px 0}
.sx-pr-host:empty{display:none}
.sx-pr-cur{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.sx-tree{background:#fff;border:1px solid var(--line,#e2e8f0);border-radius:14px;padding:8px;display:flex;flex-direction:column;gap:2px}
.sx-tn{display:flex;align-items:center;gap:4px}
.sx-tn.d1{margin-left:18px}.sx-tn.d2{margin-left:36px}
.sx-tn-t{flex:none;width:34px;height:40px;border:0;background:none;cursor:pointer;color:var(--mut,#64748b);transition:transform .15s}
.sx-tn-t.open{transform:rotate(90deg)}
.sx-tn-b{flex:1;min-width:0;display:flex;justify-content:space-between;gap:10px;align-items:center;min-height:44px;padding:8px 12px;border:0;border-radius:10px;background:none;text-align:left;font:inherit;cursor:pointer;color:var(--ink,#0f172a)}
.sx-tn-b:hover{background:var(--ps,#eef2ff)}
.sx-tn.d0>.sx-tn-b .sx-tn-n{font-weight:700}
.sx-tn-c{flex:none;font-size:.82rem;color:var(--mut,#64748b)}
.sx-tn:not(:has(.sx-tn-t)) .sx-tn-b{margin-left:34px}