/* Étudier mon cours — v41 */
.mode-switch{flex-wrap:wrap}.mode-switch button{min-width:30%}
.st-files{display:flex;flex-direction:column;gap:6px;margin-top:8px}
.st-file{display:flex;align-items:center;justify-content:space-between;gap:8px;background:#ffffff14;border-radius:8px;padding:7px 10px;font-size:13px;color:#fff}
.st-file span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.st-file button{border:0;background:transparent;color:#fff;font-size:15px;cursor:pointer;padding:2px 6px}
.st-what{display:flex;gap:6px;flex-wrap:wrap}
.st-what button{flex:1;min-width:30%;border:1.5px solid #ffffff55;background:transparent;color:#fff;font:inherit;font-size:13px;font-weight:700;padding:10px 6px;border-radius:9px;cursor:pointer}
.st-what button.on{background:var(--ochre-bright);border-color:var(--ochre-bright);color:var(--ink)}
.st-tabs{display:flex;gap:4px;background:var(--rule-soft);padding:3px;border-radius:10px}
.st-tabs button{border:0;background:transparent;font:inherit;font-size:13px;font-weight:700;padding:8px 12px;border-radius:8px;cursor:pointer;color:var(--ink)}
.st-tabs button.on{background:var(--pine);color:#fff}
.st-body{max-width:860px;margin:0 auto}
.st-card{background:var(--paper-soft);border:1px solid var(--rule);border-radius:14px;padding:18px 20px;margin:0 0 16px}
.st-card h3{margin:0 0 10px;font-size:19px;display:flex;gap:10px;align-items:center}
.st-card h3 span{background:var(--pine);color:#fff;border-radius:50%;min-width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;font-size:14px}
.st-card p{margin:.6em 0;line-height:1.65}
.st-sum{border-left:5px solid var(--ochre-bright)}
.st-kp,.st-ex{margin-top:12px;padding:10px 14px;border-radius:10px}
.st-kp{background:#EAF0FF}.st-ex{background:#FFF6DC}
.st-kp b,.st-ex b{display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--pine-deep)}
.st-kp ul{margin:6px 0 0;padding-left:20px}
.st-card dt{font-weight:700;margin-top:10px}.st-card dd{margin:2px 0 0 0;color:var(--ink-soft)}
.st-q{background:var(--paper-soft);border:2px solid var(--rule);border-radius:14px;padding:16px;margin:0 0 16px}
.st-q.ok{border-color:#2E8B57}.st-q.ko{border-color:#C8322B}
.st-q h4{margin:0 0 10px;font-size:17px;line-height:1.4;display:flex;gap:10px;align-items:flex-start}
.st-q h4 span{background:var(--ink);color:#fff;border-radius:8px;min-width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;flex:none}
.st-hint{display:block;margin:-4px 0 8px 38px;color:var(--ink-soft);font-style:italic}
.st-opts{display:flex;flex-direction:column;gap:8px}
.st-opt{display:flex;align-items:center;gap:12px;min-height:50px;padding:10px 12px;border:2px solid var(--rule);border-radius:12px;cursor:pointer;background:#fff;transition:.15s}
.st-opt input{position:absolute;opacity:0;pointer-events:none}
.st-opt i{font-style:normal;font-weight:700;width:30px;height:30px;border:2px solid var(--ink-soft);border-radius:8px;display:inline-flex;align-items:center;justify-content:center;flex:none;font-size:14px}
.st-opt.sel{border-color:var(--pine);background:#EAF0FF}.st-opt.sel i{background:var(--pine);border-color:var(--pine);color:#fff}
.st-opt input:focus-visible+i{outline:3px solid var(--ochre-bright)}
.st-opt.good{border-color:#2E8B57;background:#E4F5EA}.st-opt.good i{background:#2E8B57;border-color:#2E8B57;color:#fff}
.st-opt.bad{border-color:#C8322B;background:#FCE8E6}.st-opt.bad i{background:#C8322B;border-color:#C8322B;color:#fff}
.st-check{margin-top:12px}
.st-fb{margin-top:12px;padding:10px 14px;border-radius:10px;background:#F4EFE6}.st-fb p{margin:.4em 0 0}
.st-score{position:sticky;top:64px;z-index:4;background:var(--ink);color:#fff;border-radius:12px;padding:12px 16px;margin-bottom:14px;font-size:16px}
.st-actions{display:flex;gap:10px;flex-wrap:wrap;margin:8px 0 30px}
/* projection */
.st-pslide .pr-body{display:flex;flex-direction:column;gap:.55em}
.st-popt{display:flex;align-items:center;gap:.7em;text-align:left;width:100%;font:inherit;font-size:1em;padding:.5em .8em;border:.12em solid var(--prline,#9aa7c7);border-radius:.6em;background:var(--prcard,#fff);color:inherit;cursor:pointer}
.st-popt i{font-style:normal;font-weight:700;min-width:1.7em;height:1.7em;border:.1em solid currentColor;border-radius:.4em;display:inline-flex;align-items:center;justify-content:center;font-size:.85em;flex:none}
.st-popt.sel{border-color:var(--pc);box-shadow:0 0 0 .12em var(--pc)}.st-popt.sel i{background:var(--pc);color:#fff;border-color:var(--pc)}
.st-popt.good{border-color:#2E8B57;background:rgba(46,160,90,.2)}.st-popt.good i{background:#2E8B57;color:#fff;border-color:#2E8B57}
.st-popt.bad{border-color:#C8322B;background:rgba(200,50,43,.18)}.st-popt.bad i{background:#C8322B;color:#fff;border-color:#C8322B}
.st-pbtn{align-self:flex-start;font:inherit;font-size:.8em;font-weight:700;padding:.45em 1em;border:0;border-radius:.6em;background:var(--pc);color:#fff;cursor:pointer;margin-top:.3em}
.st-pfb{margin-top:.4em;padding:.5em .8em;border-radius:.6em;font-size:.85em}
.st-pfb.ok{background:rgba(46,160,90,.15)}.st-pfb.ko{background:rgba(200,50,43,.13)}.st-pfb div{margin-top:.3em}
@media print{
  body.st-print .lesson-toolbar,body.st-print .st-actions,body.st-print .st-check,body.st-print .st-score{display:none!important}
  #studyWrap .st-card,#studyWrap .st-q{break-inside:avoid}
}

.st-tabs{flex-wrap:wrap}
.st-calc h3{flex-wrap:wrap}.st-diff{font-size:12px;font-weight:700;background:#FFF6DC;border-radius:6px;padding:2px 8px;color:var(--ink-soft)}
.st-try{width:100%;margin-top:10px;border:1.5px dashed var(--rule);border-radius:10px;padding:10px;font:inherit;background:#fff;resize:vertical}
.st-sol{margin-top:10px;border:2px solid #2E8B57;border-radius:12px;background:#F1FAF4}
.st-sol summary{cursor:pointer;font-weight:700;padding:11px 14px;color:#1F6B42;min-height:44px}
.st-sol>div{padding:2px 16px 12px}.st-sol p{white-space:normal}
.st-final{background:#fff;border-radius:8px;padding:8px 12px;border-left:4px solid #2E8B57}
#stQcmOpts{grid-template-columns:1fr 1fr}