#challenge-app{--choices:4;min-width:0}#challenge-app [hidden]{display:none!important}#challenge-app :is(h2,h3,h4,p){margin:0}#challenge-app :is(h2,h3){letter-spacing:-.025em;line-height:1.3}#challenge-app h2{font-size:1.5rem;font-weight:650}#challenge-app h3{font-size:1.1875rem;font-weight:650}#challenge-app svg{max-width:100%;height:auto;display:block}#challenge-app summary{color:var(--accent);cursor:pointer;min-height:44px;padding:10px 0;font-weight:650}#challenge-app summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}#challenge-app details[open]>summary{margin-bottom:12px}#challenge-app .example-prompt{text-align:center;max-width:none;margin:14px 0 18px;font-weight:550}#challenge-app .sample-stimulus{max-width:790px;margin-inline:auto}#challenge-app .worked-example{max-width:750px;margin:14px auto 0}#challenge-app .worked-example>summary{text-align:center;font-size:15px}#challenge-app .sample-answer{justify-content:center;align-items:center;gap:24px;margin-block:16px;display:flex}#challenge-app .sample-answer>div{width:96px}#challenge-app .about{margin-top:30px}#challenge-app .about p+p{margin-top:12px}#challenge-app .round{margin-top:32px}#challenge-app .round-meta{color:var(--muted);align-items:center;gap:20px;margin-bottom:24px;font-size:15px;display:flex}#challenge-app .round-meta strong{color:var(--ink)}#challenge-app .round-meta .practice-end-tools{margin-left:auto}#challenge-app .round h2{scroll-margin-top:24px}#challenge-app .question-instruction{color:var(--muted);margin-top:10px}#challenge-app .question-stimulus{background:var(--accent-soft);border-radius:16px;margin-top:24px;padding:28px}#challenge-app .choice-field{border:0;min-width:0;margin:24px 0 0;padding:0}#challenge-app .choice-field legend{margin-bottom:12px;font-weight:650}#challenge-app .answer-options{grid-template-columns:repeat(var(--choices), minmax(0, 1fr));gap:12px;display:grid}#challenge-app .answer-option{border:1px solid var(--control-border);background:var(--card);cursor:pointer;border-radius:12px;flex-direction:column;gap:4px;min-height:145px;padding:12px;display:flex;position:relative}#challenge-app .answer-option:hover{border-color:var(--accent);background:var(--accent-soft)}#challenge-app .answer-option:focus-within{outline:3px solid var(--accent);outline-offset:3px}#challenge-app .answer-option input{opacity:0;cursor:pointer;width:100%;height:100%;margin:0;position:absolute;inset:0}#challenge-app .answer-option input:disabled{cursor:default}#challenge-app .answer-option [data-answer-mark]{top:8px;font-size:.8rem;position:absolute;inset-inline-end:8px}#challenge-app .answer-letter{color:var(--muted);font-size:14px;font-weight:650}#challenge-app .answer-art{flex:1;justify-content:center;align-items:center;min-width:0;display:flex}#challenge-app .answer-art>svg{width:100%;max-width:130px;max-height:135px}#challenge-app .answer-option.selected{background:var(--accent-soft);border:2px solid var(--accent);padding:11px}#challenge-app .answer-option.correct{background:var(--accent-soft);border:2px solid var(--good);padding:11px}#challenge-app .answer-option.incorrect{border:2px dashed var(--bad);background:var(--card);padding:11px}#challenge-app .choice-note{text-align:center;min-height:19px;font-size:12px;font-weight:600}#challenge-app .answer-option.correct .choice-note{color:var(--good)}#challenge-app .answer-option.incorrect .choice-note{color:var(--bad)}#challenge-app .answer-tools{justify-content:space-between;align-items:start;gap:24px;margin-top:16px;display:flex}#challenge-app .answer-tools p{color:var(--muted)}#challenge-app .keyboard-help{color:var(--muted);white-space:nowrap;padding-top:12px;font-size:13px}#challenge-app .round-actions{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;margin-top:28px;display:flex}#challenge-app .active-time{color:var(--muted);font-size:14px}#challenge-app #challenge-active-time{font-variant-numeric:tabular-nums;margin-left:10px}#challenge-app .feedback{background:var(--card);border-radius:16px;margin-top:22px;padding:24px 28px}#challenge-app .explanation-steps{margin:20px 0 0;padding-left:24px}#challenge-app .explanation-steps>li{padding-left:8px}#challenge-app .explanation-steps>li+li{margin-top:18px}#challenge-app .explanation-steps h3{margin-bottom:4px;font-size:17px}#challenge-app .explanation-steps p{color:var(--muted);font-size:16px}#challenge-app .explanation-diagram{max-width:540px;margin-top:12px}#challenge-app .explanation-diagram>svg{max-width:100%;max-height:170px}#challenge-app .results{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:32px}#challenge-app .board-metrics{gap:64px;margin-block:24px;display:flex}#challenge-app .board-metrics dt{color:var(--muted);font-size:15px}#challenge-app .board-metrics dd{font-variant-numeric:tabular-nums;margin:4px 0 0;font-size:32px;font-weight:650;line-height:1.25}#challenge-app .results>p{color:var(--muted);margin-bottom:.75rem;font-size:15px}#challenge-app .result-actions{flex-wrap:wrap;gap:16px;margin-top:26px;display:flex}#challenge-app .review{margin-top:30px}#challenge-app .review>summary{font-size:18px}#challenge-app .review>summary span{margin-left:8px;font-weight:400}#challenge-app .review-list{gap:16px;display:grid}#challenge-app .review-question{background:var(--bg);border-radius:12px;padding:12px 20px}#challenge-app .review-question>summary{justify-content:space-between;align-items:center;gap:16px;list-style:none;display:flex}#challenge-app .review-question>summary:after{content:"+";font-size:24px;font-weight:400}#challenge-app .review-question[open]>summary:after{content:"−"}#challenge-app .review-question>summary::-webkit-details-marker{display:none}#challenge-app .review-status{margin-left:auto;font-size:14px}#challenge-app .review-status.right{color:var(--good)}#challenge-app .review-status.wrong{color:var(--bad)}#challenge-app .review-question>h3{margin-top:12px}#challenge-app .review-answer-pair{flex-wrap:wrap;gap:40px;margin-top:24px;display:flex}#challenge-app .review-answer-pair>div{width:160px}#challenge-app .review-answer-pair h4{margin-bottom:8px;font-size:14px;font-weight:550}#challenge-app .review-answer-pair svg{max-height:130px}#challenge-app .review-question .explanation-steps{margin-bottom:20px}#challenge-app .stimulus{color:var(--ink)}#challenge-app .dp-sequence{justify-content:center;align-items:center;gap:12px;max-width:930px;margin:auto;display:flex}#challenge-app .dp-cell{text-align:center;flex:1;min-width:0;max-width:150px}#challenge-app .dp-cell>svg{width:100%;max-height:140px}#challenge-app .dp-cell>span,#challenge-app .dp-cell>small{color:var(--muted);margin-top:4px;font-size:13px;display:block}#challenge-app .dp-figure{width:100%;max-width:170px;margin-inline:auto;display:block}#challenge-app .dp-pair{justify-content:center;align-items:center;gap:20px;max-width:570px;margin:auto;display:flex}#challenge-app .dp-pair+.dp-pair{margin-top:14px}#challenge-app .dp-pair>svg{max-width:140px}#challenge-app .dp-arrow{color:var(--muted);flex:none;font-size:24px}#challenge-app .dp-matrix{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;max-width:365px;margin-inline:auto;display:grid}#challenge-app .dp-matrix .dp-cell{background:var(--card);border-radius:8px;max-width:none;padding:6px}#challenge-app .dp-matrix .dp-cell>svg{max-height:98px}#challenge-app .dp-examples{grid-template-columns:1fr 1fr;gap:32px;max-width:820px;margin:auto;display:grid}#challenge-app .dp-example-group{min-width:0}#challenge-app .dp-example-group h3,#challenge-app .dp-example-group h4,#challenge-app .dp-example-group>p{text-align:center;margin-bottom:10px;font-size:15px;font-weight:650}#challenge-app .dp-example-group>div{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}#challenge-app .dp-example-group svg{max-width:112px;max-height:112px}#challenge-app .dp-example-group .dp-cell{flex-basis:90px}#challenge-app .stimulus>svg{max-height:310px;margin:auto}#challenge-app .dp-views{flex-wrap:wrap;justify-content:center;align-items:center;gap:28px;display:flex}#challenge-app .dp-view{flex:0 160px;min-width:0}#challenge-app .dp-view svg{width:100%}#challenge-app .dp-view figcaption{text-align:center;color:var(--muted);font-size:14px}#challenge-app .dp-views figure{margin:0}#challenge-app .stimulus figure{margin-block:0}#challenge-app .dp-cube-clues{justify-content:center;align-items:center;gap:28px;display:flex}#challenge-app .dp-cube-clues>div{max-width:180px}@media (width<=850px){#challenge-app .answer-options{grid-template-columns:repeat(3,minmax(0,1fr))}#challenge-app .keyboard-help{display:none}#challenge-app .dp-sequence{gap:6px}#challenge-app .dp-cell>svg{max-height:120px}#challenge-app .dp-examples{gap:20px}}@media (width<=600px){#challenge-app h2{font-size:23px}#challenge-app .setup-example{padding:16px}#challenge-app .example-prompt{font-size:15px}#challenge-app .worked-example .explanation-steps{padding-left:18px}#challenge-app .explanation-steps h3{font-size:16px}#challenge-app .explanation-steps p{font-size:15px}#challenge-app .round{margin-top:26px}#challenge-app .round-meta{flex-wrap:wrap;gap:4px 12px;margin-bottom:18px}#challenge-app .round-meta>#challenge-mode{order:3;width:100%;font-size:14px}#challenge-app .question-stimulus{margin-top:20px;padding:18px 12px}#challenge-app .answer-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}#challenge-app .answer-option{min-height:140px}#challenge-app .answer-art>svg{max-height:116px}#challenge-app .answer-tools{margin-top:12px}#challenge-app .round-actions{gap:12px;margin-top:20px}#challenge-app .active-time{font-size:13px}#challenge-app #challenge-active-time{margin-left:4px}#challenge-app .feedback{padding:20px}#challenge-app .feedback .explanation-steps{padding-left:16px}#challenge-app .dp-sequence{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px 8px;display:grid}#challenge-app .dp-sequence .dp-cell{max-width:none}#challenge-app .dp-sequence .dp-cell>svg{max-height:90px}#challenge-app .dp-pair{gap:10px}#challenge-app .dp-pair>svg{max-width:100px}#challenge-app .dp-pair .dp-cell{max-width:105px}#challenge-app .dp-examples{grid-template-columns:1fr;gap:22px}#challenge-app .dp-example-group svg{max-width:88px;max-height:88px}#challenge-app .dp-example-group .dp-cell{flex-basis:72px}#challenge-app .dp-matrix{gap:6px;max-width:300px}#challenge-app .dp-matrix .dp-cell{padding:4px}#challenge-app .dp-matrix .dp-cell>svg{max-height:86px}#challenge-app .dp-views{gap:10px}#challenge-app .dp-view{flex-basis:115px}#challenge-app .dp-cube-clues{gap:12px}#challenge-app .dp-cube-clues>div{max-width:130px}#challenge-app .results{padding:24px 20px}#challenge-app .board-metrics{gap:36px}#challenge-app .board-metrics dd{font-size:28px}#challenge-app .board-metrics dt{font-size:14px}#challenge-app .result-actions{flex-direction:column;gap:12px}#challenge-app .review-question{padding:10px 14px}#challenge-app .review-question>summary{gap:10px}#challenge-app .review-status{font-size:12px}#challenge-app .review-answer-pair{gap:20px}#challenge-app .review-answer-pair>div{width:120px}}#challenge-app .answer-art .dp-figure{max-width:130px}#challenge-app .answer-art svg{max-height:135px}#challenge-app .dp-missing{place-items:center;font-size:44px;display:grid}#challenge-app .dp-examples>figure{justify-self:center;width:100%;max-width:200px;margin:0}#challenge-app .dp-example-group>.dp-pair{flex-wrap:nowrap}#challenge-app .dp-classification{grid-template-columns:1fr 1fr;gap:32px;max-width:780px;margin:auto;display:grid}#challenge-app .dp-classification .dp-examples{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:280px;display:grid}#challenge-app .dp-classification .dp-figure{background:var(--card);border-radius:8px;max-width:120px;padding:8px}#challenge-app .dp-classification .dp-figure svg{width:100%;max-width:none;max-height:none}#challenge-app .example-instruction{text-align:center;color:var(--muted);margin:-8px auto 20px;font-size:14px}#challenge-app[data-practice=opposite-faces] .stimulus>.dp-examples{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;max-width:540px}#challenge-app[data-practice=shape-analogies] .stimulus>.dp-examples{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;max-width:960px}@media (width<=600px){#challenge-app[data-practice=shape-analogies] .stimulus>.dp-examples{grid-template-columns:1fr;gap:22px}#challenge-app[data-practice=opposite-faces] .stimulus>.dp-examples{gap:12px}#challenge-app .dp-classification{gap:16px}#challenge-app .dp-classification .dp-figure{padding:4px}#challenge-app .dp-classification .dp-example-group h3{font-size:14px}#challenge-app .dp-classification .dp-examples{gap:6px}#challenge-app .dp-classification .dp-figure svg{min-width:0}#challenge-app .answer-art svg{max-height:116px}}@media (prefers-reduced-motion:reduce){#challenge-app *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}#challenge-app .setup-example{background:0 0;padding:0}#challenge-app .challenge-summary span{color:var(--muted);font-weight:400}#challenge-app .answer-options{grid-template-columns:repeat(4,minmax(0,1fr))}#challenge-app .challenge-message{padding-block:24px}#challenge-app .challenge-message>.btn{width:auto;margin-top:16px}#challenge-app #challenge-save{color:var(--muted)}#challenge-app .sample-stimulus{margin-top:16px}#challenge-app .challenge-sr{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}@media (width<=600px){#challenge-app .answer-options{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (forced-colors:active){#challenge-app .answer-option.selected{outline:2px solid highlight}#challenge-app .answer-option.correct{border:3px double canvastext}#challenge-app .answer-option.incorrect{border:2px dashed canvastext}}