.lesson-practice-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:start}.lesson-practice-grid>.sim-grid{grid-template-columns:1fr}.question-card{padding:25px;border:1px solid var(--border);border-radius:16px;background:var(--surface)}.question-card h2{font-size:24px;line-height:1.3;margin:8px 0 12px}.question-card p,.question-card small,.question-heading>p,.question-content>p{color:var(--muted)}.question-mini-levels{display:grid;gap:8px;margin:24px 0 18px}.question-mini-levels a{display:flex;align-items:center;gap:12px;min-height:48px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px}.question-mini-levels a span:first-child{color:var(--muted);font-size:12px}.question-mini-levels a span:last-child{margin-left:auto}.question-mini-levels a:hover{border-color:var(--accent)}.question-heading{margin:12px 0 28px}.question-heading h1{font-size:clamp(27px,4vw,38px);line-height:1.2;margin:10px 0}.question-heading>.text-link{min-height:44px;color:var(--accent)}.question-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px}.question-levels{display:grid;gap:10px;align-content:start}.question-levels a{display:flex;align-items:center;gap:12px;padding:16px;border:1px solid var(--border);border-radius:12px;min-height:80px;background:var(--surface)}.question-levels strong{display:block;font-size:15px}.question-levels small{display:block;color:var(--muted);margin-top:5px}.question-number{font-size:13px;color:var(--muted)}.question-levels [aria-current]{border-color:var(--accent);box-shadow:inset 3px 0 var(--accent)}.question-dot{width:7px;height:7px;border-radius:50%;background:var(--border);margin-left:auto;flex-shrink:0}.question-levels [aria-current] .question-dot{background:var(--accent)}.question-content{padding:28px;border:1px solid var(--border);border-radius:16px;background:var(--surface);min-width:0}.question-content header{display:flex;gap:12px;align-items:center;justify-content:space-between}.question-content h2{font-size:27px;margin:20px 0 8px}.question-content>p{margin:0;line-height:1.6}.question-state{font-size:11px;border:1px solid var(--border);padding:5px 9px;border-radius:20px;white-space:nowrap;color:var(--muted)}.question-empty{padding:38px 12px;text-align:center}.question-empty svg{width:80px;height:80px;stroke:var(--accent);stroke-width:1.5}.question-empty h3{font-size:21px;margin:14px 0 8px}.question-empty p{max-width:350px;margin:0 auto 24px;color:var(--muted);line-height:1.7;font-size:14px}.question-content footer{border-top:1px solid var(--border);padding-top:16px;color:var(--muted);font-size:12px;line-height:1.6}.workspace-questions{white-space:nowrap;border:1px solid var(--border);border-radius:8px;padding:8px 12px;min-height:44px;display:inline-flex;align-items:center;font-size:13px}.workspace-questions[hidden]{display:none}.question-levels a:focus-visible,.question-mini-levels a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media(max-width:1100px){.lesson-practice-grid{grid-template-columns:minmax(0,1fr) 270px}.question-layout{grid-template-columns:200px minmax(0,1fr);gap:16px}.question-content{padding:22px}}
@media(max-width:700px){.lesson-practice-grid,.question-layout{grid-template-columns:1fr;gap:16px}.question-card{padding:20px}.question-card h2{font-size:22px}.question-mini-levels{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.question-mini-levels a{font-size:12px;gap:6px;padding:10px 8px}.question-levels{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.question-levels a{min-height:76px;padding:12px 10px;gap:8px}.question-levels strong{font-size:13px}.question-levels small{font-size:11px}.question-content{padding:20px 16px}.question-content h2{font-size:24px}.question-empty{padding:26px 0}.question-content header .eyebrow{font-size:10px}.question-heading{margin-bottom:20px}.workspace-questions{padding:6px 8px;font-size:12px}.question-layout{padding-bottom:25px}}

/* The same scene stays mounted while the learner refers back to the question. */
.practice-toolbar{position:sticky;top:0;z-index:8;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;background:var(--bg);border-bottom:1px solid var(--border)}
.practice-toolbar>span{font-size:13px;color:var(--muted)}
.practice-toolbar button,.practice-return{min-height:44px;padding:10px 14px;border-radius:10px;background:var(--accent);color:#152311;font:600 14px system-ui;cursor:pointer}
.practice-return[hidden]{display:none}
.practice-preview .workspace-full,.practice-preview .workspace-back,.practice-preview .workspace-questions{display:none!important}
.practice-preview .workspace-title{font-size:13px;min-width:0}
.practice-preview .workspace-bar{padding:8px 12px;flex-wrap:nowrap}
.practice-preview .simulation-viewport{flex:1;min-height:0}
.practice-preview .simulation-frame{height:100%;min-height:0}
.practice-preview-open #main{display:grid;grid-template-columns:minmax(320px,.8fr) minmax(540px,1.2fr);gap:20px;max-width:none;align-items:start}
.practice-preview-open #page-view{min-width:0}
.practice-preview-open .question-layout{grid-template-columns:1fr}
.practice-preview-open .question-levels{grid-template-columns:repeat(2,minmax(0,1fr))}
.practice-preview{position:sticky;top:12px;display:flex;flex-direction:column;height:calc(100dvh - 32px);max-height:900px;min-width:0}
@media(max-width:1250px){
 .practice-preview-open{overflow:hidden}
 .practice-preview-open #main{display:block}
 .practice-preview{position:fixed;inset:0;z-index:10001;height:100dvh;max-height:none;border:0;border-radius:0;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);background:var(--bg)}
 .practice-preview .workspace-bar{padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right))}
 .practice-return{font-size:13px;white-space:nowrap}
}
@media(max-width:380px){.practice-toolbar{gap:8px}.practice-toolbar>span{font-size:11px}.practice-toolbar button{font-size:12px;padding:8px 10px}.practice-preview .workspace-title{font-size:11px}}

/* Keep the return action readable at narrow phone widths. */
.practice-return{max-width:240px;line-height:1.35;white-space:normal}
@media(max-width:600px){.practice-preview .workspace-title{flex:1;min-width:0}.practice-return{flex:0 1 190px;white-space:normal;text-align:center;padding:8px 10px}}

.question-progress{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted);margin:25px 0 12px}.question-jump{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:22px}.question-jump button{min-width:42px;min-height:42px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);padding:7px;font:inherit;font-size:12px}.question-jump [aria-current]{background:var(--accent);color:#152311;border-color:var(--accent)}.question-kind{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:11px;color:var(--muted);margin-bottom:12px}.question-kind span:first-child{color:var(--accent)}#question-prompt{font-size:19px;line-height:1.65;font-weight:550;margin:0 0 20px;scroll-margin-top:85px}.question-options{padding:0;border:0;display:grid;gap:10px;min-width:0}.question-options legend{font-size:12px;color:var(--muted);margin-bottom:12px}.question-option{display:flex;align-items:flex-start;gap:10px;padding:14px;border:1px solid var(--border);border-radius:12px;cursor:pointer;font-size:15px;line-height:1.65;min-height:54px}.question-option:has(input:checked){border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--surface))}.question-option input,.truth-options input{accent-color:var(--accent);width:18px;height:18px;flex-shrink:0;margin:4px 0}.option-letter{font-weight:700}.question-option.is-correct{border-color:#60ab78}.question-statements{display:grid;gap:12px}.question-statements fieldset{border:1px solid var(--border);border-radius:12px;padding:14px;min-width:0}.question-statements legend{font-size:15px;line-height:1.7;padding:0 5px;max-width:100%}.truth-options{display:flex;gap:12px}.truth-options label{min-height:44px;display:flex;align-items:center;gap:8px;padding:8px 16px;border:1px solid var(--border);border-radius:8px;font-size:14px;cursor:pointer}.truth-options label:has(input:checked){border-color:var(--accent)}.truth-options input{margin:0}.statement-explanation{font-size:13px;line-height:1.7;color:var(--muted)}.short-answer{display:grid;gap:10px;font-size:14px}.short-answer input{width:100%;max-width:320px;min-height:50px;padding:12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font:18px system-ui}.question-actions{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0}.question-secondary,.question-paging button{min-height:44px;padding:10px 14px;font:14px system-ui;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:9px}.question-actions button:disabled,.question-paging button:disabled{opacity:.45;cursor:not-allowed}.question-paging{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--border);padding:16px 0 24px}.answer-feedback{padding:16px;border:1px solid var(--border);border-left:4px solid #c39151;border-radius:10px;margin-top:18px;font-size:14px;line-height:1.7}.answer-feedback.correct{border-left-color:#60ab78}.answer-feedback p{margin:8px 0 0;color:var(--muted)}#question-work{scroll-margin-top:85px}.question-content :is(button,input):focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media(max-width:600px){#question-prompt{font-size:17px}.question-option{padding:12px 10px;font-size:14px;gap:8px}.question-actions{display:grid;grid-template-columns:1fr}.question-actions button{width:100%}.question-statements fieldset{padding:12px 10px}.question-jump button{min-width:40px;min-height:44px}.question-statements legend{font-size:14px}.question-progress{font-size:12px}.question-mini-levels a span:last-child{font-size:10px}}
.question-figure{margin:18px 0 24px}.question-figure img{display:block;width:100%;max-width:640px;height:auto;border-radius:12px;margin:auto}.question-figure figcaption{text-align:center;color:var(--muted);font-size:12px;line-height:1.6;margin-top:8px}[data-theme="light"] .practice-toolbar button,[data-theme="light"] .practice-return,[data-theme="light"] .question-jump [aria-current]{color:#fff}

/* Optional investigation instructions stay compact on phones. */
.question-investigation{margin:0 0 22px;padding:0 14px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px;line-height:1.65;overflow-wrap:anywhere}
.question-investigation summary{min-height:44px;padding:12px 0;cursor:pointer;font-weight:600;color:var(--text)}
.question-investigation:not([open]){padding-bottom:0}
.question-investigation p{margin:0 0 8px;color:var(--muted)}
.question-investigation ol{margin:0 0 14px;padding-left:22px}
.question-investigation li{margin-bottom:10px}
.question-investigation summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
@media(max-width:600px){.question-investigation{padding-left:10px;padding-right:10px;font-size:13px}.question-investigation button{width:100%;white-space:normal}}


/* Preserve the paragraph breaks used in question setups and explanations. */
#question-prompt,.answer-feedback p,.statement-explanation{white-space:pre-line;overflow-wrap:anywhere}