/* Large shared-screen quiz: selections stay separate from answer reveal. */
.material-tabs{grid-template-columns:repeat(4,minmax(0,1fr))}
.material-tabs button{min-width:0}
.quiz-workspace{padding:0;color:var(--ink)}
.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:17px 28px;border-bottom:1px solid var(--line);background:#f0f7f9}
.quiz-top .eyebrow{margin:0 0 3px;font-size:12px}
.quiz-topic{font-size:17px;font-weight:650}
.quiz-count{display:flex;align-items:center;gap:18px;font-size:14px;color:var(--muted)}
.quiz-count strong{font-size:23px;color:var(--brand)}
.quiz-count strong span{font-size:18px;font-weight:500}
.quiz-scroll{padding:23px 28px 18px}
[id$="quiz-question"]{font-size:clamp(24px,2.15vw,34px);line-height:1.35;margin:0 0 20px;letter-spacing:-.4px;outline:none}
.quiz-body{display:grid;grid-template-columns:minmax(230px,30%) minmax(0,1fr);gap:25px;align-items:start}
.quiz-visual{margin:0;border:1px solid #c5dce3;background:linear-gradient(150deg,#f1f8fa,#e4f1f5);border-radius:12px;padding:8px;overflow:hidden}
.quiz-visual svg{display:block;width:100%;height:auto;max-height:245px;font-family:"Segoe UI",Arial,sans-serif}
.quiz-visual figcaption{text-align:center;font-size:12px;color:var(--muted);padding:3px 2px 4px}
.quiz-instruction{margin:0 0 12px;color:var(--muted);font-size:16px}
.quiz-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.quiz-option{position:relative;display:grid;grid-template-columns:34px minmax(0,1fr);gap:5px 10px;align-content:center;text-align:left;padding:14px 16px;min-height:91px;border:2px solid #9bbbc5;border-radius:10px;background:#fff;color:var(--ink);font-size:clamp(18px,1.6vw,24px);font-weight:600;line-height:1.35}
.quiz-option>b{width:34px;height:34px;display:grid;place-items:center;font-size:17px;border-radius:6px;color:var(--brand);background:var(--brand-soft)}
.quiz-option>small{grid-column:2;font-size:12px;min-height:16px;font-weight:650;color:var(--brand)}
.quiz-option[aria-pressed=true]{border-color:var(--brand-red);background:#edf5f7;box-shadow:inset 0 0 0 1px var(--brand-red)}
.quiz-option:hover:not([aria-disabled=true]){background:#f1f8fa;border-color:var(--brand-red)}
.quiz-option[aria-disabled=true]{cursor:default}
.quiz-option.is-correct{background:#e9f5ed;border-color:#267451;box-shadow:inset 0 0 0 1px #267451}
.quiz-option.is-correct>small,.quiz-option.is-correct>b{color:#205d41}
.quiz-option.is-correct>b{background:#d4eadc}
.quiz-option.is-mistake{background:#fff0f2;border-color:var(--brand-red);box-shadow:inset 0 0 0 1px var(--brand-red)}
.quiz-option.is-mistake>small{color:var(--brand-red-ink)}
.quiz-hint-row{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:9px}
.quiz-link{background:none;color:var(--brand);border:0;padding:6px 0;text-decoration:underline;text-underline-offset:4px;font-weight:650;font-size:15px}
.quiz-hint-row>span{font-size:12px;color:var(--muted)}
.quiz-hint{padding:11px 14px;border-left:3px solid var(--brand);background:#edf5f7;font-size:17px;margin:4px 0 0}
.quiz-explanation{margin-top:20px;padding:15px 19px;background:#f0f7f9;border-left:4px solid #729aa7;border-radius:0 8px 8px 0;font-size:17px;line-height:1.5}
.quiz-explanation strong{font-size:19px}
.quiz-explanation p{margin:5px 0 0}
.quiz-explanation.is-revealed{border-color:var(--brand);animation:quiz-appear .25s ease-out}
.quiz-explanation .quiz-discussion{font-size:16px;margin-top:9px;color:#36535e}
.quiz-actions{display:flex;gap:15px;align-items:center;justify-content:space-between;padding:14px 28px;border-top:1px solid var(--line);background:#fff}
.quiz-primary,.quiz-secondary{min-height:46px;border-radius:7px;padding:10px 20px;font-size:17px;font-weight:650}
.quiz-primary{border:2px solid var(--brand);background:var(--brand);color:#fff}
.quiz-primary:hover:not(:disabled){background:var(--brand-hover)}
.quiz-secondary{border:1px solid #90b4c0;background:white;color:var(--ink)}
.quiz-secondary:hover:not(:disabled){border-color:var(--brand-red)}
.quiz-progress{display:flex;gap:7px;justify-content:center;flex-wrap:wrap;padding:0 20px 15px}
.quiz-progress button{position:relative;min-width:38px;min-height:33px;background:white;color:var(--ink);border:1px solid #90b4c0;border-radius:6px;font-size:14px;font-weight:650;padding:5px 9px}
.quiz-progress button.is-answered{background:#e3f0f3;color:var(--brand)}
.quiz-progress button[aria-current=step]{border:2px solid var(--brand-red);box-shadow:0 0 0 1px var(--brand-red)}
.quiz-progress button>span{font-size:11px;margin-left:3px}
.quiz-summary{padding:30px;overflow-y:auto}
.quiz-summary h2{font-size:30px;margin:6px 0 14px;outline:none;line-height:1.3}
.quiz-summary>p{color:var(--muted);margin:10px 0;font-size:17px}
.quiz-summary-count strong{font-size:27px;color:var(--brand)}
.quiz-summary-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:25px 0}
.quiz-summary-list button{display:flex;gap:12px;align-items:center;text-align:left;border:1px solid #b3ced8;border-radius:8px;background:#f3f8fa;color:var(--ink);font-size:17px;padding:12px}
.quiz-summary-list button:hover{border-color:var(--brand-red)}
.quiz-summary-list b{color:var(--brand)}
.quiz-summary-list small{margin-left:auto;font-size:12px;color:var(--muted)}
.quiz-summary-bottom{display:flex;flex-wrap:wrap;gap:14px;margin-top:18px}
.quiz-route-car{animation:quiz-route 2.4s ease-in-out forwards}
.quiz-return-car{animation:quiz-return 2.4s ease-in-out forwards}
@keyframes quiz-route{0%{transform:translateX(0)}65%{transform:translateX(260px)}100%{transform:translateX(195px)}}
@keyframes quiz-return{0%{transform:translateX(0)}50%{transform:translateX(-144px)}100%{transform:translateX(0)}}
@keyframes quiz-appear{from{opacity:.5;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:751px){
 .presenting .quiz-workspace .quiz-top,.presenting .quiz-workspace .quiz-actions,.presenting .quiz-workspace .quiz-progress{flex-shrink:0}
 .presenting .quiz-scroll{flex:1;min-height:0;overflow-y:auto;scrollbar-width:thin}
 .presenting .quiz-top{padding:10px 24px}
 .presenting .quiz-scroll{padding:16px 24px 12px}
 .presenting [id$="quiz-question"]{margin-bottom:16px;font-size:28px}
 .presenting .quiz-option{font-size:20px;padding:10px 14px;min-height:88px}
 .presenting .quiz-explanation{margin-top:16px}
 .presenting .quiz-actions{padding:12px 24px}
 .presenting .quiz-summary{flex:1;min-height:0}
}
@media(max-width:1100px) and (min-width:751px){
 .quiz-body{grid-template-columns:minmax(190px,27%) minmax(0,1fr);gap:16px}
 .quiz-option{padding:10px;font-size:18px;grid-template-columns:29px minmax(0,1fr);gap:5px 8px;min-height:100px}
 .quiz-option>b{width:29px;height:29px;font-size:15px}
 .quiz-scroll{padding:20px}
 .quiz-hint-row>span{display:none}
 .quiz-summary-list button{flex-wrap:wrap}
}
@media(max-width:750px){
 .material-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}
 .app-shell .material-tabs button{flex-direction:row;align-items:center;font-size:14px;gap:8px;padding:10px}
 .quiz-top{padding:14px 16px;gap:12px}
 .quiz-count{flex-direction:column;align-items:flex-end;gap:0;white-space:nowrap;font-size:12px}
 .quiz-count strong{font-size:19px}
 .quiz-topic{font-size:14px}
 .quiz-scroll,.presenting .quiz-scroll{padding:18px 16px}
 [id$="quiz-question"]{font-size:23px}
 .quiz-body{grid-template-columns:1fr;gap:17px}
 .quiz-visual svg{max-height:190px}
 .quiz-visual{max-width:100%}
 .quiz-option{font-size:18px;min-height:96px;padding:10px;grid-template-columns:28px minmax(0,1fr);gap:5px 7px}
 .quiz-option>b{width:28px;height:28px;font-size:15px}
 .quiz-option>small{font-size:11px}
 .quiz-hint-row>span{display:none}
 .quiz-explanation{font-size:17px;padding:13px}
 .quiz-actions{padding:13px 12px;gap:8px;flex-wrap:wrap}
 .quiz-primary,.quiz-secondary{font-size:14px;padding:10px 12px;min-height:44px}
 .quiz-progress{gap:6px;padding:0 12px 16px}
 .quiz-progress button{min-width:38px;min-height:36px}
 .quiz-summary{padding:22px 16px}
 .quiz-summary h2{font-size:25px}
 .quiz-summary-list{grid-template-columns:1fr}
 .quiz-summary-list button{font-size:16px}
}
@media(prefers-reduced-motion:reduce){
 .quiz-route-car,.quiz-return-car,.quiz-explanation.is-revealed{animation:none}
 .quiz-route-car{transform:translateX(195px)}
}