/* A quiet study desk, with copper labels and diagrams that stay sharp at any size. */
.learning-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.94fr);align-items:center;gap:35px;padding:14px 0 34px;border-bottom:1px solid #a9b6a5}.learning-hero h1{font-size:clamp(38px,4.4vw,65px);line-height:1.06;letter-spacing:-2px;margin:17px 0 22px}.learning-hero h1 em{color:var(--green);font-weight:400}.learning-hero-copy>p{max-width:430px;line-height:1.8;color:var(--muted);margin-bottom:23px}.learning-hero .row{gap:17px}.hero-resume{font-size:11px;color:var(--muted);margin-top:19px;line-height:1.7}.learning-hero-figure{margin:0;border:1px solid #c7cbbc;background:#f7f5ed;transform:rotate(1deg);box-shadow:5px 6px 0 #e5e3d7;overflow:hidden}.learning-hero-figure figcaption{border-top:1px solid var(--line);padding:13px 17px;font:10px 'Courier New',monospace;color:var(--muted);letter-spacing:.6px}.study-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:28px 0 0;border:1px solid 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26px;background:var(--paper);color:var(--ink);transition:background .15s,border-color .15s}.path-card:hover{background:#f0f3e9;border-color:#7e947f;text-decoration:none}.path-card-top{display:flex;justify-content:space-between;align-items:center}.path-card h3{font:400 27px Georgia,serif;margin:12px 0 10px;letter-spacing:-.4px}.path-card p{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:18px}.path-meta{font-size:11px;color:var(--muted)}.path-dots{display:flex;gap:5px;margin:16px 0 17px}.path-dots>span{height:4px;flex:1;background:#e1e5db}.path-dots .done{background:var(--green)}.path-card-link{font-size:12px;font-weight:600}.learning-back{display:inline-block;font-size:12px;margin-bottom:20px}.stage-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin:0 0 27px}.stage-nav a{display:flex;gap:10px;align-items:center;justify-content:center;padding:13px 10px;border:1px solid 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21px;background:#eef2e6;line-height:1.7;min-height:105px}.lab-reading p{font-size:13px;margin:5px 0 0}.lab-limit{font-size:11px;line-height:1.8;color:var(--muted);margin-top:14px}.science-lab>.text-link{font-size:12px}.lesson-next{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin:30px 0;padding:25px 0}.lesson-next>span{font-size:12px;color:var(--muted)}.concept-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:40px}.learning-concept{padding:9px 0 28px;margin-bottom:18px;border-bottom:1px solid var(--line)}.learning-concept h2{margin:12px 0 15px}.learning-concept p{font-size:16px;line-height:1.95;max-width:690px}.concept-side{background:#eeefe5;padding:25px;align-self:start}.concept-side h3{font-size:14px;margin:30px 0 10px}.concept-side>a{display:block;font-size:12px;line-height:1.8;margin-top:10px}.term-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.term-chips button{font-size:12px;text-align:left;display:flex;gap:12px;background:var(--paper)}.term-chips button>span{color:var(--copper);margin-left:auto}.reflection{max-width:900px;padding:32px}.reflection-prompt{font:22px/1.6 Georgia,serif;margin:25px 0}.reflection>label{font-size:12px;display:block;margin:20px 0 8px}.reflection textarea{min-height:180px;font-size:15px;line-height:1.8}.reflection .hint-box{margin:20px 0}.reflection ul{padding-left:22px;line-height:1.9}.reflection .small{line-height:1.8;margin-bottom:18px}.learning-quiz{padding:29px 34px;max-width:980px;margin:auto}.quiz-toolbar{display:flex;justify-content:space-between;gap:15px;font-size:12px}.question-map{display:flex;flex-wrap:wrap;gap:7px;margin:22px 0 30px}.question-map button{min-width:37px;min-height:37px;padding:5px 8px;font-size:11px;background:transparent}.question-map button.correct{background:#e8eee1}.question-map button.active{border:2px solid var(--green);color:var(--green)}.learning-quiz h2{font-size:27px;line-height:1.5;max-width:760px;margin-bottom:23px}.question-figure{max-width:640px;margin:0 auto 25px;border:1px solid var(--line)}.learning-options{border:0;padding:0;display:grid;gap:10px;margin:0 0 22px}.learning-options label{display:flex;gap:12px;align-items:center;border:1px solid var(--line);padding:15px 17px;line-height:1.6;cursor:pointer;background:#fcfcf5}.learning-options label:has(input:checked){border-color:var(--green);background:#e9efdf}.learning-options input{width:18px;height:18px;margin:0;flex-shrink:0;accent-color:var(--green)}.learning-answer{display:grid;grid-template-columns:1fr 1fr;gap:15px;max-width:530px;margin:12px 0 22px}.learning-answer label{font-size:12px}.learning-answer input{display:block;width:100%;margin-top:8px}.activity-feedback:empty{display:none}.activity-feedback{margin-top:22px;line-height:1.8}.activity-feedback p{margin:5px 0}.quiz-next{margin-top:20px;gap:15px}.quiz-next 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label{max-width:350px;width:100%}.card-filter select{display:block;width:100%;margin-top:8px}.card-filter>span{color:var(--muted);white-space:nowrap}.flashcard{max-width:780px;margin:0 auto;text-align:center;padding:48px 45px;min-height:390px;box-shadow:5px 5px 0 #e3e5d8}.flashcard h2{font-size:43px;margin:25px 0 11px}.flashcard p{line-height:1.8}.flashcard .english{font-size:15px;color:var(--copper);margin-bottom:32px}.card-cue{color:var(--muted);margin:36px 0 25px}.card-definition{padding:20px 0;margin-bottom:20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.card-definition p{font:23px/1.7 Georgia,serif}.card-rating{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:25px}.card-rating button{padding:15px}.card-rating small{display:block;font-size:11px;font-weight:400;margin-top:7px}.text-button{border:0;background:transparent;color:var(--green);text-decoration:underline;text-underline-offset:4px;font-size:12px;padding:8px 0}.flashcard .row{justify-content:center;margin-top:26px}.glossary-grid h2{font-size:24px}.glossary-grid p{line-height:1.8}.lesson-path-callout{margin:25px 0;padding:25px;background:#eef1e4;border-left:3px solid var(--green)}.lesson-path-callout h2{margin:10px 0}.lesson-path-callout p{font-size:13px;margin-bottom:16px}.figure-dialog,.term-dialog{border:1px solid #b9c6b0;border-radius:7px;padding:25px;background:var(--paper);color:var(--ink);width:min(1100px,94vw);max-height:90dvh;overflow:auto;margin:auto;box-shadow:0 25px 100px #122b3644}.figure-dialog::backdrop,.term-dialog::backdrop{background:#172e2ed1}.dialog-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}.dialog-toolbar button{font-size:12px}.term-dialog{width:min(630px,94vw);padding:30px}.term-dialog h2{font-size:36px;margin:15px 0 10px}.term-dialog .english{color:var(--copper)}.term-definition{font:21px/1.7 Georgia,serif;margin:22px 0}.term-figure{border:1px solid var(--line);margin:22px 0}.home-question-compact{margin-top:32px}.home-question-compact .desk-entry{background:transparent}.learning-source{font-size:11px;line-height:1.8;color:var(--muted);margin:30px 0}.learning-stats+ .section-heading{margin-top:8px}
@media(max-width:1150px){.learning-hero{gap:20px}.learning-hero h1{font-size:47px}.learning-hero .row{flex-wrap:wrap}.study-actions>a{padding:18px 13px;gap:10px}.study-actions h2{font-size:13px}.action-index{font-size:20px}.concept-layout{grid-template-columns:minmax(0,1fr) 225px;gap:25px}.concept-side{padding:20px}.path-card{padding:22px}.path-card h3{font-size:25px}.calculator-directory{grid-template-columns:1fr 1fr}}
@media(max-width:900px){.sidebar{padding-bottom:16px}.sidebar #nav{margin:0;display:block}.nav-primary{position:fixed;bottom:0;left:0;right:20%;height:69px;z-index:70;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding:3px 0 max(3px,env(safe-area-inset-bottom));background:#f4f3eaf5;border-top:1px solid #bcc7b1;backdrop-filter:blur(12px)}.nav-primary .nav-link{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:10px;padding:4px;min-width:0}.nav-primary .nav-link svg{width:19px;height:19px}.nav-more{position:fixed;bottom:0;right:0;width:20%;height:69px;z-index:71;background:#f4f3eaf5;border-top:1px solid #bcc7b1;border-left:1px solid #d7ddcd;padding-bottom:env(safe-area-inset-bottom)}.nav-secondary{position:fixed;bottom:69px;left:10px;right:10px;background:var(--paper);border:1px solid #b4c4a8;box-shadow:0 -15px 70px #152c362b;border-radius:8px 8px 0 0;padding:13px;z-index:72;max-height:65dvh;overflow-y:auto;grid-template-columns:repeat(2,minmax(0,1fr))}.nav-secondary .nav-link{white-space:normal;min-height:46px}.workspace{padding-bottom:72px}.page-footer{padding-bottom:25px}.toast{bottom:90px}.learning-hero h1{font-size:50px}.learning-hero-figure{transform:none}.learning-hero-copy>p{font-size:14px}.study-actions{margin-top:22px}.sidebar nav .nav-more.active{background:#e8eddc}.sidebar .course-label{top:23px}}
@media(max-width:670px){.learning-hero{grid-template-columns:1fr;padding-top:0;gap:25px}.learning-hero h1{font-size:44px;letter-spacing:-1.4px;margin:16px 0 17px}.learning-hero-copy>p{font-size:14px;margin-bottom:20px}.learning-hero-figure{max-width:470px;width:100%;justify-self:center}.learning-hero-figure figcaption{font-size:9px;padding:10px 13px}.hero-resume{font-size:11px}.study-actions{grid-template-columns:1fr}.study-actions>a{border-right:0;border-bottom:1px solid var(--line);padding:18px}.study-actions>a:last-child{border-bottom:0}.study-actions h2{font-size:15px}.study-actions p{font-size:12px}.action-index{width:30px;font-size:24px}.learning-stats{display:grid;gap:11px;padding-bottom:20px;font-size:11px}.path-grid{grid-template-columns:1fr;gap:15px;margin-top:18px}.path-card{padding:22px}.path-card h3{font-size:28px}.stage-nav{gap:5px}.stage-nav a{flex-direction:column;gap:7px;font-size:11px;padding:11px 4px}.stage-nav a>span{font-size:11px;width:23px;height:23px}.learning-objectives{padding:20px}.learning-objectives ul{display:block;padding-left:20px}.learning-objectives li{max-width:none;margin-top:7px;font-size:13px}.observation{padding:12px 16px}.observation p{font-size:14px}.science-lab{padding:15px;margin:18px 0}.lab-top{gap:10px;align-items:flex-start}.lab-top h2{font-size:22px}.lab-top .eyebrow{font-size:9px}.lab-top>button{font-size:10px;white-space:normal;max-width:87px;padding:7px;line-height:1.5}.lab-figure{margin:0 -6px}.lab-controls{grid-template-columns:1fr;gap:17px;margin-top:19px}.lab-controls label{font-size:13px}.lab-controls input[type=range]{margin-top:5px}.lab-controls select{font-size:16px}.part-buttons{gap:7px}.part-buttons button{font-size:11px;flex:1;padding:8px}.lab-reading{padding:14px;min-height:0;font-size:14px;overflow-wrap:anywhere}.lab-reading p{font-size:13px}.lab-limit{font-size:11px}.lesson-next{align-items:flex-start;flex-direction:column;gap:13px}.lesson-next button{width:100%;font-size:12px;line-height:1.6}.concept-layout{grid-template-columns:1fr;gap:12px}.concept-side{padding:23px}.learning-concept p{font-size:15px;line-height:1.9}.learning-concept h2{font-size:25px}.reflection{padding:24px 19px}.reflection-prompt{font-size:21px}.reflection textarea{font-size:16px}.reflection .row>*{width:100%;font-size:12px;line-height:1.7;white-space:normal}.learning-quiz{padding:23px 17px}.quiz-toolbar{font-size:11px}.quiz-toolbar .eyebrow{font-size:9px;line-height:1.7;max-width:220px}.question-map{gap:6px;margin:18px 0 23px}.question-map button{min-width:36px;min-height:36px;padding:5px}.learning-quiz h2{font-size:23px;line-height:1.5}.learning-options label{font-size:14px;padding:12px}.learning-answer{grid-template-columns:1fr;gap:15px}.learning-answer input{font-size:16px}.order-items li{padding:11px 9px;gap:9px}.order-items li>span{font-size:12px}.order-items li>div{flex-direction:column}.order-items button{min-height:35px;min-width:36px;padding:3px 8px}.order-items li:before{font-size:15px}.quiz-next button{font-size:12px}.quiz-summary,.quiz-empty{padding:26px 21px}.quiz-summary>h2{font-size:32px}.tool-visual-grid{grid-template-columns:1fr;gap:19px}.calculator-directory{grid-template-columns:1fr}.card-filter{display:block}.card-filter>span{display:block;margin-top:12px}.flashcard{padding:30px 20px;min-height:380px}.flashcard h2{font-size:34px;overflow-wrap:anywhere}.card-definition p{font-size:21px}.card-rating{gap:9px}.card-rating button{padding:13px 8px;font-size:12px}.figure-dialog,.term-dialog{padding:16px;width:96vw;max-height:91dvh}.term-dialog h2{font-size:30px}.dialog-toolbar{margin-bottom:17px}.term-definition{font-size:19px}.page-intro h1{font-size:31px}.learning-back{margin-bottom:16px}.home-question-compact{margin-top:26px}.home-question-compact .desk-entry{padding:21px 17px}.learning-source{font-size:11px}.section-heading .text-link{font-size:11px;max-width:115px;line-height:1.7;text-align:right}}
@media(prefers-reduced-motion:reduce){.path-card{transition:none}*{scroll-behavior:auto!important}}
@media print{.stage-nav,.lab-controls,.expand-figure,.nav-primary,.nav-more,.nav-secondary,.lesson-next,.quiz-next{display:none!important}.workspace{padding-bottom:0}.learning-hero-figure{box-shadow:none;transform:none}.path-card,.science-lab{break-inside:avoid}.science-svg{max-height:350px}}

.figure-scroll{overflow:auto;max-height:65dvh}.figure-zoom-content{min-width:100%}.figure-zoom{display:flex;align-items:center;gap:15px;font-size:12px;margin:15px 0}.figure-zoom input{max-width:280px;accent-color:var(--green)}.figure-zoom output{min-width:40px}

@media(min-width:901px){.nav-secondary a[href="#settings"]{display:none}}
.lab-mode{display:flex;gap:6px;padding:5px;margin:0 0 20px;width:fit-content;max-width:100%;background:#e9eee7;border:1px solid #d4dfd4;border-radius:10px}.lab-mode button{border:0;background:transparent;box-shadow:none;padding:11px 17px;color:#335746}.lab-mode button[aria-pressed="true"]{background:#234f3e;color:#fff}.lab-task{padding:24px 28px;margin-bottom:18px;border-left:4px solid #b46c44;background:#f1ede0;border-radius:0 12px 12px 0}.lab-task h2{font:500 clamp(23px,2.5vw,32px)/1.2 Georgia,serif;margin:12px 0}.lab-task p{max-width:75ch;line-height:1.6;margin:10px 0}.lab-task .small{color:#48604c;border-top:1px solid #d7d9cb;padding-top:12px;margin-bottom:0}.lab-exercise-model .science-lab{margin-bottom:16px}.reaction-prediction{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:20px 0 0;padding:18px;border:1px solid #c5d2c3;border-radius:10px;background:#eef2e8}.reaction-prediction legend{font-weight:600;padding:0 8px;color:#254f3e}.reaction-prediction label{display:grid;gap:10px;font-size:14px}.reaction-prediction input{min-width:0;width:100%;font-size:23px;background:#fff;padding:12px}.lab-check-actions{display:flex;gap:10px;flex-wrap:wrap}.lab-hint{padding:18px 22px;margin-top:18px;border:1px solid #d9c396;background:#faf3df;border-radius:10px;line-height:1.65}.lab-feedback:empty{display:none}.lab-feedback p{line-height:1.65}.lab-feedback .small{margin-bottom:0}.lab-practice-next{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;border-top:1px solid #d6ddd1;padding-top:22px;margin:22px 0 18px}.lab-practice-next a{color:#355c49}.lab-practice-overview{margin:36px 0}.lab-practice-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.lab-practice-card{display:block;color:inherit;text-decoration:none}.lab-practice-card h3{font:500 27px/1.25 Georgia,serif;margin:14px 0}.lab-practice-card p{line-height:1.6}.lab-practice-card .small{display:block;border-top:1px solid #d6ddd1;padding-top:15px;line-height:1.6;color:#48604c}.practice-review-note{display:block;margin-top:10px;color:#895033;font-size:13px}.lab-practice-card:hover{border-color:#476c50;background:#f4f5ee}.lab-storage-warning:empty{display:none}.lab-check-form button:disabled,.lab-controls :disabled,.reaction-prediction :disabled{opacity:.65;cursor:default}@media(max-width:670px){.lab-mode{width:100%}.lab-mode button{flex:1;padding:11px 9px}.lab-task{padding:20px}.reaction-prediction{grid-template-columns:1fr;gap:12px;padding:14px}.reaction-prediction label{grid-template-columns:minmax(0,1fr) 85px;align-items:center}.reaction-prediction input{font-size:20px;padding:10px}.lab-practice-cards{grid-template-columns:1fr}.lab-check-actions button{flex:1}.lab-check-actions [data-check]{flex-basis:100%}.lab-practice-next{align-items:flex-start}.lab-practice-next button{width:100%}.lab-practice-overview .section-heading{flex-wrap:wrap;gap:8px}}
.exercise-help-button{border-color:#477564!important;background:#e9f0e7!important;color:#214e3e!important;font-weight:600}.activity-help,#exercise-help{margin:16px 0}.exercise-help-dialog{width:min(820px,calc(100vw - 28px));max-height:calc(100dvh - 32px);padding:0;border:1px solid #bdcbb9;border-radius:14px;background:#f8f7ef;color:#244b3c;box-shadow:0 20px 90px #173a3233}.exercise-help-dialog::backdrop{background:#172c2670}.exercise-help-dialog>.dialog-toolbar{position:sticky;top:0;z-index:2;background:#f8f7ef;border-bottom:1px solid #cdd7c6;padding:18px 24px}.exercise-help-dialog .dialog-toolbar h2{font:27px/1.2 Georgia,serif;margin:0}.exercise-help-dialog .dialog-toolbar button{white-space:nowrap}.exercise-help-body{padding:0 26px 26px}.exercise-help-intro{line-height:1.7}.exercise-help-body .tutor-field,.saved-exercise-help .tutor-field{display:grid;gap:9px;margin:18px 0;font-size:13px}.exercise-help-body textarea,.saved-exercise-help textarea{width:100%;font:14px/1.6 'Segoe UI',sans-serif;resize:vertical}.exercise-help-body .step-assistance,.saved-exercise-help .step-assistance{margin-top:18px}.exercise-help-body .tutor-actions,.saved-exercise-help .tutor-actions{display:flex;gap:9px;flex-wrap:wrap}.exercise-help-body .tutor-help,.saved-exercise-help .tutor-help{font-size:12px;line-height:1.7;color:#5b6c59}.exercise-help-footer{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin:24px 0 14px;padding-top:18px;border-top:1px solid #cdd7c6}.exercise-help-save{color:#875135;font-size:13px;line-height:1.7}.help-problem{padding:15px 18px;border:1px solid #d8decd;border-radius:8px;margin:18px 0;background:#f1f3e9}.help-problem summary{cursor:pointer;font-weight:600;font-size:14px}.help-problem textarea{background:#fafbf7}.exercise-help-body .help-record p,.saved-exercise-help .help-record p{white-space:pre-wrap;overflow-wrap:anywhere}.image-drop-zone{padding:24px 20px;border:2px dashed #8ca58a;background:#edf2e7;color:#345643;border-radius:8px;line-height:1.7;text-align:center;margin:16px 0;cursor:copy}.image-drop-zone:focus{outline:3px solid #537f70;outline-offset:3px}.exercise-help-body .exercise-image img,.saved-exercise-help .exercise-image img{max-height:330px;object-fit:contain;width:100%}.saved-exercise-help{max-width:900px;padding:26px}.exercise-help-body .image-confirm,.saved-exercise-help .image-confirm{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.6;margin:14px 0}.image-confirm input{width:18px;min-width:18px;margin-top:3px}.image-review button{margin:5px 6px 5px 0}@media(max-width:670px){.exercise-help-dialog{width:calc(100vw - 16px);max-height:calc(100dvh - 16px)}.exercise-help-dialog>.dialog-toolbar{padding:15px}.exercise-help-dialog .dialog-toolbar h2{font-size:24px}.exercise-help-body{padding:0 16px 22px}.exercise-help-body .tutor-actions button,.saved-exercise-help .tutor-actions button{flex:1 1 45%}.exercise-help-body .exercise-image{padding:12px}.image-drop-zone{padding:18px 12px}.lab-check-actions .exercise-help-button{flex-basis:100%}}
.training-callout{display:flex;gap:24px;align-items:center;justify-content:space-between;margin:28px 0}.training-callout h2{margin:8px 0}.training-callout p{margin:0}.training-callout .row{flex-shrink:0;max-width:45%}
.test-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(270px,1fr);gap:22px;margin:24px 0}.test-chapters{border:0;padding:0;margin:0;display:grid;gap:8px}.test-chapters label{display:flex;gap:12px;align-items:flex-start;padding:16px 10px;border-bottom:1px solid var(--line);cursor:pointer}.test-chapters input,.test-review-filter input{width:19px;height:19px;flex-shrink:0;margin:3px 0;accent-color:var(--green)}.test-chapters small{display:block;margin-top:5px;color:var(--muted)}.test-settings label:not(.test-review-filter){display:grid;gap:8px}.test-settings select{width:100%}.test-review-filter{display:flex;gap:12px;margin:22px 0}.test-preview{background:var(--tint);padding:18px;line-height:1.65}.test-resume{margin-bottom:22px;border-left:4px solid var(--green)}.test-question h2{font-size:26px;line-height:1.45;margin:25px 0}.test-question .question-map{margin-top:20px;flex-wrap:wrap}.test-question fieldset{border:0;padding:0}.test-question .learning-options legend{margin-bottom:10px}.test-navigation{border-top:1px solid var(--line);padding-top:20px;margin-top:24px}.test-finish-confirm:not(:empty){margin-top:24px}.test-input-status{min-height:1.5em}.test-history{margin-top:40px}.test-history-list{display:grid;gap:10px}.test-history-list button{text-align:left;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:18px;background:var(--paper)}
.progress-toolbar{display:flex;flex-wrap:wrap;gap:20px;margin:28px 0 12px}.progress-toolbar label{display:grid;gap:8px;flex:1;min-width:200px}.chapter-progress-list,.run-report-rows{display:grid;gap:20px}.chapter-progress h2{margin:8px 0 0}.chapter-progress .section-heading{align-items:flex-start;gap:18px;margin-top:0}.progress-badge{font-size:12px;background:var(--tint);padding:8px 10px;white-space:nowrap}.progress-badge.review{background:#f6e7dc;color:#873e2c}.chapter-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:26px 0}.chapter-metrics strong{display:block;font-family:Georgia,serif;font-size:27px;font-weight:400}.chapter-metrics span{display:block;margin-top:5px;font-size:13px;color:var(--muted)}.chapter-answer-bar{height:8px;background:#e7e5dc;display:flex;border-radius:3px;overflow:hidden}.chapter-answer-bar .correct{background:var(--green)}.chapter-answer-bar .wrong{background:var(--copper)}.chapter-answer-bar .unanswered{background:#b3a78f}.chapter-progress .row{margin-top:22px}.report-actions{margin:24px 0}.report-row{border-left:4px solid #b3a78f}.report-row.correct{border-left-color:var(--green)}.report-row.wrong{border-left-color:var(--copper)}.report-row h2{font-size:24px;line-height:1.4}.report-row dl{display:grid;grid-template-columns:90px minmax(0,1fr);gap:12px;background:var(--tint);padding:18px}.report-row dt{font-weight:600}.report-row dd{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}.report-explanation{white-space:pre-line;line-height:1.75}.training-links{margin-bottom:20px}
@media(max-width:800px){.test-layout{grid-template-columns:1fr}.training-callout{display:block}.training-callout .row{max-width:none;margin-top:20px}.chapter-progress .section-heading{display:block}.progress-badge{display:inline-block;margin-top:12px}.chapter-metrics{gap:12px}.chapter-metrics strong{font-size:24px}.report-row dl{grid-template-columns:1fr;gap:6px}.report-row dd{margin-bottom:10px}.test-question h2{font-size:23px}.test-history-list button{display:grid}.report-actions>*{flex-grow:1;text-align:center}}
.report-chapter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,210px),1fr));gap:12px;margin-top:20px}.report-chapter-grid button{text-align:left;display:grid;gap:9px;padding:18px;background:var(--paper);border:1px solid var(--line)}.report-chapter-grid button[aria-pressed="true"]{border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green);background:var(--tint)}.report-chapter-grid strong{font-size:16px}.report-chapter-score{font:24px Georgia,serif;margin-top:8px}.report-chapter-grid small{color:var(--muted)}.report-review-actions{justify-content:space-between;margin:18px 0}.report-review-actions p{margin:0}.report-review-actions button{white-space:normal}
@media(max-width:600px){.report-chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.report-chapter-grid button{padding:12px;gap:8px}.report-chapter-grid strong{font-size:14px;overflow-wrap:anywhere}.report-chapter-score{font-size:20px}.report-chapter-grid small{font-size:11px;line-height:1.5}}
.quick-revision{margin-top:24px;padding-top:22px;border-top:1px solid var(--line)}.quick-revision p{font-size:13px;line-height:1.7}.quick-revision button{width:100%;white-space:normal;border-color:var(--green);color:var(--green)}
.review-plan{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:30px;align-items:center;background:#e9eee2;border:1px solid #bac7b0;border-left:4px solid var(--green);padding:28px;margin:26px 0 20px}.review-plan h2{font:30px/1.2 Georgia,serif;margin:10px 0 12px}.review-plan p{max-width:650px;line-height:1.75;margin:0}.review-plan-actions{display:grid;gap:9px;min-width:210px}.review-plan-actions button{white-space:normal}.review-issue-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.review-issue-list button{background:#fff9;padding:8px 12px;font-size:12px;display:flex;gap:9px;align-items:center}.review-issue-list button[aria-pressed="true"]{background:var(--green);color:white}.review-issue-list b{font-size:17px;font-weight:600}.review-chapters{margin:20px 0;padding:18px 22px}.review-chapters>summary{cursor:pointer;font-weight:600}.review-chapters>summary>span{float:right;font-size:12px;font-weight:400;color:var(--muted)}.review-filters{gap:14px}.review-filters label{min-width:170px;font-size:12px}.review-filters select{min-height:45px;width:100%;font-size:13px}
.guided-review{padding:0;overflow:clip}.guided-review>summary{cursor:pointer;list-style:none;display:grid;grid-template-columns:32px minmax(0,1fr) 16px;gap:14px;align-items:start;padding:22px;scroll-margin-top:20px}.guided-review>summary::-webkit-details-marker{display:none}.review-number{font:25px Georgia,serif;color:var(--muted)}.guided-review>summary small{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:9px}.guided-review>summary strong{display:block;font:21px/1.5 Georgia,serif}.review-chevron{font-size:22px;line-height:1.4}.guided-review[open] .review-chevron{transform:rotate(180deg)}.review-answer-body{padding:0 22px 24px}.review-answer-body>dl{margin:0 0 18px}.review-advice{padding:18px 20px;border-left:2px solid var(--copper);background:#fbf6ed}.review-advice h3{font-size:17px;margin:8px 0}.review-advice p{margin:0;line-height:1.8}.guided-review.correct .review-advice{border-color:var(--green);background:var(--tint)}.review-row-actions{margin:20px 0;align-items:center}.review-row-actions .exercise-help-button{margin:0}.review-row-actions button{white-space:normal}.review-solution{border-top:1px solid var(--line);padding:17px 0;margin:6px 0 10px}.review-solution>summary{cursor:pointer;font-size:14px;color:var(--green);font-weight:600}.review-correct-answer{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.8}.review-footnote{margin-top:24px;line-height:1.7}.run-report-rows:has(.guided-review){gap:12px}
@media(max-width:760px){.review-plan{grid-template-columns:1fr;gap:20px;padding:22px}.review-plan h2{font-size:28px}.review-plan-actions{grid-template-columns:1fr 1fr;min-width:0}.review-plan-actions .primary{grid-column:1/-1}.review-filters{display:grid;grid-template-columns:1fr 1fr}.review-filters label:first-child{grid-column:1/-1}.review-filters label{min-width:0}.guided-review>summary{padding:18px 14px;grid-template-columns:23px minmax(0,1fr) 12px;gap:10px}.guided-review>summary strong{font-size:20px}.review-answer-body{padding:0 15px 20px}.review-advice{padding:16px}.review-row-actions{display:grid;grid-template-columns:1fr}.review-row-actions button{width:100%}.review-issue-list button{font-size:11px}.report-review-actions button{width:100%}.review-chapters>summary{font-size:14px}}

/* Equivalent exercises keep the question prominent. */
.variant-label{display:inline-block;margin:16px 0 0;padding:7px 11px;border-radius:6px;background:#e7f0ec;color:#245b48;font-size:.72rem;font-weight:700;letter-spacing:.04em}
.review-row-actions{flex-wrap:wrap}
.lab-resume-label{display:block;padding:10px 13px;background:#e4eddf;border:1px solid #b9cbb0;border-radius:7px;font-size:12px;font-weight:600;color:#31553e;margin:12px 0}.lab-draft-status{color:var(--muted);padding-left:3px;line-height:1.6}.lab-storage-warning button{margin:8px 0 16px}
.backup-text{margin-top:18px;border-top:1px solid var(--line);padding-top:15px}.backup-text summary{cursor:pointer;font-size:13px;font-weight:600}.backup-text p{font-size:12px;line-height:1.75}.backup-text label{font-size:12px;display:grid;gap:8px}.backup-text textarea{font:12px/1.6 monospace;width:100%;min-width:0;resize:vertical;max-height:500px}.backup-export-status{line-height:1.7}

/* Numeric model practice keeps givens and the learner's prediction separate. */
.lab-focus{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:18px 0;font-size:14px}.lab-focus select{width:auto;min-width:200px}.quantity-bridge{display:grid;grid-template-columns:minmax(0,1fr) 38px minmax(0,1fr);gap:12px;align-items:stretch}.quantity-bridge section{border:1px solid #c8d2bf;border-radius:12px;padding:25px;background:#f0f2e8;min-width:0}.quantity-bridge h3{font:26px Georgia,serif;margin:16px 0}.quantity-given p{font:20px/1.6 Georgia,serif;margin:8px 0;overflow-wrap:anywhere}.quantity-arrow{align-self:center;text-align:center;color:var(--copper);font-size:30px}.quantity-bridge .quantity-unknown{background:#fcf7ec;border-color:#d5c6a9}.quantity-value{font:34px/1.4 Georgia,serif;overflow-wrap:anywhere;min-height:48px}.quantity-value small{font-size:20px}.quantity-unknown .small{line-height:1.7;color:var(--muted)}.numeric-prediction{display:grid;grid-template-columns:minmax(0,2fr) minmax(110px,1fr);gap:18px;margin:24px 0 0;padding:20px;border:1px solid #c5d2c3;border-radius:10px}.numeric-prediction legend{font-weight:600;padding:0 8px}.numeric-prediction label{display:grid;gap:10px;font-size:14px}.numeric-prediction input,.numeric-prediction select{width:100%;min-width:0;min-height:48px;font-size:20px}.numeric-prediction p{grid-column:1/-1;font-size:12px;line-height:1.8;margin:0;color:var(--muted)}.numeric-prediction :disabled{opacity:.7}.figure-zoom-content .quantity-bridge{padding:20px}
@media(max-width:670px){.quantity-bridge{grid-template-columns:1fr;gap:10px}.quantity-arrow{transform:rotate(90deg);line-height:1}.quantity-bridge section{padding:19px}.quantity-bridge h3{font-size:24px;margin:12px 0}.quantity-given p{font-size:20px}.quantity-value{font-size:29px;margin:12px 0}.numeric-prediction{padding:15px;gap:12px;grid-template-columns:minmax(0,1fr)}.numeric-prediction p{grid-column:auto}.numeric-lab .lab-top{align-items:flex-start;flex-wrap:wrap}.lab-focus select{flex:1}.figure-zoom-content .quantity-bridge{padding:10px}}

.lab-review-entry{margin-top:22px;gap:20px;flex-wrap:wrap}.lab-review-summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0 25px}.lab-review-summary a{border:1px solid var(--line);padding:20px;color:var(--ink);background:var(--paper);display:grid;gap:10px}.lab-review-summary a[aria-current="true"]{border-color:var(--green);background:var(--tint);box-shadow:inset 0 0 0 1px var(--green)}.lab-review-summary strong{font:36px Georgia,serif}.lab-review-summary span{font-size:13px}.lab-review-resume{padding:22px 25px;background:var(--tint);border-left:3px solid var(--green);margin:20px 0 28px;line-height:1.7}.lab-review-resume p{margin:10px 0 15px}.lab-review-resume .row{gap:10px;flex-wrap:wrap}.lab-review-filters{display:flex;align-items:end;flex-wrap:wrap;gap:16px;margin:25px 0 12px}.lab-review-filters label{display:grid;gap:9px;flex:1;min-width:190px;font-size:13px}.lab-review-filters select{min-height:46px;width:100%}.lab-review-filters button{min-height:46px}.lab-review-count{margin:18px 0;color:var(--muted)}.lab-review-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.lab-review-item{display:flex;flex-direction:column;min-width:0;padding:24px}.lab-review-item-top{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}.lab-review-item .eyebrow{font-size:10px;line-height:1.6}.lab-result-badge{border:1px solid #c8cec0;border-radius:20px;padding:6px 10px;font-size:11px;background:#f2f2e9}.lab-result-badge.independent{color:#2c5637;background:#e4eedf;border-color:#aebfa4}.lab-result-badge.wrong,.lab-result-badge.assisted,.lab-result-badge.revealed,.lab-result-badge.working{color:#7a4e31;background:#f8eee0;border-color:#d7c3a5}.lab-review-item h2{font:24px/1.45 Georgia,serif;margin:21px 0 12px;overflow-wrap:anywhere}.lab-review-item>p{font-size:13px;line-height:1.8;color:var(--muted);overflow-wrap:anywhere;margin:0 0 22px}.lab-review-item-bottom{margin-top:auto;display:flex;gap:14px;flex-wrap:wrap;align-items:center;justify-content:space-between;padding-top:17px;border-top:1px solid var(--line)}.lab-review-item-bottom>.small{color:var(--muted);font-size:11px}.lab-review-pages{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:25px 0}.lab-review-pages>span{font-size:12px}.lab-review-footnote{line-height:1.8;margin-top:28px}.lab-review-empty,.lab-draft-choice{padding:30px}.lab-review-empty h2,.lab-draft-choice h2{font:29px/1.4 Georgia,serif;margin:12px 0}.lab-review-empty p,.lab-draft-choice p{line-height:1.8;margin:15px 0}.lab-draft-choice .row{flex-wrap:wrap;gap:12px;margin:24px 0}.lab-previous-result{padding-top:12px;border-top:1px solid var(--line);color:var(--muted)}
@media(max-width:670px){.lab-review-summary{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.lab-review-summary a{padding:17px}.lab-review-summary strong{font-size:30px}.lab-review-grid{grid-template-columns:1fr}.lab-review-item{padding:20px}.lab-review-item h2{font-size:23px}.lab-review-filters{display:grid;grid-template-columns:1fr;gap:12px}.lab-review-filters label{min-width:0}.lab-review-resume{padding:20px}.lab-review-resume .button{width:100%}.lab-draft-choice{padding:22px}.lab-draft-choice .row button{width:100%}.lab-review-pages .button{font-size:12px;padding:10px}.lab-review-entry>a{width:100%}.lab-review-item-bottom .button{min-height:42px}.lab-review-empty{padding:22px}}

.lab-draft-comparison{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:20px 0}.lab-draft-comparison section{padding:18px;background:var(--tint);border:1px solid var(--line);min-width:0}.lab-draft-comparison h3{font-size:12px;text-transform:uppercase;letter-spacing:.05em;margin:0 0 12px;color:var(--muted)}.lab-draft-comparison strong{font:21px/1.5 Georgia,serif}.lab-draft-comparison p{font-size:13px;overflow-wrap:anywhere}@media(max-width:670px){.lab-draft-comparison{grid-template-columns:1fr}}
