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@media(min-width:1450px){.hero{padding-top:60px;padding-bottom:52px}.hero-image{height:430px}.hero h1{font-size:73px}}
@media(max-width:1050px){.header-inner{padding:0 30px;gap:24px}.main-nav{gap:22px}.private-label{font-size:9px}.hero{gap:34px}.hero h1{font-size:56px}.hero-image{height:380px}.hero-copy>p{font-size:13px}.activity-grid{gap:17px}.card-content{padding:20px 18px 13px}.card-content h3{font-size:22px}.card-visual{height:165px}.teaching-banner{margin-left:30px;margin-right:30px}.teaching-banner h2{font-size:24px}.article-layout{gap:32px;grid-template-columns:minmax(0,1fr) 250px}.activity-heading{gap:25px}.activity-heading h1{font-size:43px}.activity-heading{grid-template-columns:1fr 220px}.detail-art{height:160px}}
@media(max-width:800px){.brand strong{font-size:11px;letter-spacing:1.6px}.brand small{font-size:7px;letter-spacing:2px}.brand-mark{width:36px;height:36px}.main-nav{gap:19px}.main-nav>a{font-size:10px}.private-label{display:none}.site-header{height:80px}.hero{gap:26px;padding-top:35px;padding-bottom:34px}.hero h1{font-size:46px}.hero .eyebrow{font-size:8px;letter-spacing:1.3px}.hero-copy>p{font-size:12px}.hero-image{height:360px}.photo-top{font-size:6px;letter-spacing:1px;left:16px;right:16px}.photo-top span{display:none}.photo-caption{left:17px;right:17px}.photo-caption i{font-size:20px}.photo-caption small{font-size:8px;max-width:150px}.hero-foot{font-size:8px}.hero .button{font-size:10px;padding:10px 14px}.intro-bar{font-size:8px}.activity-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.card-visual{height:180px}.card-content h3{font-size:24px}.card-content>p{font-size:12px;max-width:100%}.card-topic{font-size:9px}.teaching-banner{flex-wrap:wrap}.teaching-banner .button{margin-left:78px}.banner-symbol{width:49px;height:49px}.teaching-banner h2{font-size:25px}.article-layout{grid-template-columns:1fr}.study-sidebar{position:static;display:grid;grid-template-columns:1fr 1fr;gap:20px}.activity-heading{grid-template-columns:1fr 175px;gap:20px}.activity-heading h1{font-size:38px}.detail-art{height:145px}.activity-deck{font-size:12px}.site-footer{gap:25px}.footer-note{display:none}.section-heading h2{font-size:33px}.filter-bottom{align-items:start;flex-wrap:wrap}.sort-label{margin-left:auto}.topic-chip{padding:6px 10px}.source-note{padding-bottom:35px}.next-activity h2{font-size:26px}.teaching-grid{gap:18px}.note-card{padding:25px}.note-card h2{font-size:25px}.path-options{gap:13px}.path-options a{padding:18px}.path-options span{font-size:11px}}
@media(max-width:560px){html{scroll-padding-top:25px}.wrap{padding-left:21px;padding-right:21px}.site-header{height:auto}.header-inner{padding:19px 21px 0;flex-wrap:wrap;gap:14px;justify-content:space-between}.brand{gap:9px}.brand strong{font-size:11px}.brand small{font-size:7px}.brand-mark{width:36px;height:36px}.main-nav{order:2;flex-basis:100%;gap:27px;height:43px;border-top:1px solid var(--line);justify-content:flex-start}.main-nav>a{font-size:11px}.main-nav>a.active:after{bottom:0}.private-label{display:inline-flex;font-size:7px;gap:4px;padding:4px 6px}.private-label svg{width:10px;height:11px}.hero{grid-template-columns:1fr;padding-top:31px;gap:29px;padding-bottom:26px}.hero-copy{padding-top:0}.hero .eyebrow{font-size:8px;letter-spacing:1.35px}.hero h1{font-size:54px;line-height:1.02;margin:18px 0}.hero-copy>p{font-size:13px;max-width:350px;line-height:1.85}.hero-copy>.button{margin-top:22px;font-size:11px;min-height:44px}.hero-foot{font-size:9px;margin-top:20px}.hero-image{height:265px}.photo-top{font-size:7px;left:18px;right:18px}.photo-top span{display:block;font-size:6px}.photo-caption{bottom:19px;left:18px;right:18px}.photo-caption i{font-size:24px}.photo-caption small{max-width:none;font-size:8px}.intro-bar{margin:0 21px;padding:13px 0;font-size:8px;gap:10px}.intro-bar span:nth-child(2){display:none}.intro-bar b{font-size:14px;margin-right:4px}.intro-bar i{margin:0 3px}.explore{padding-top:34px;padding-bottom:34px}.section-heading{align-items:start;margin-bottom:22px;gap:12px}.section-heading h2{font-size:31px;max-width:270px}.section-heading>p{display:none}.section-heading .eyebrow{font-size:8px;margin-bottom:9px}.filter-line{flex-direction:column;gap:10px}.search-wrap{min-height:46px;padding:0 12px}.search-wrap input{font-size:11px}.use-filter select{width:100%;font-size:11px;min-height:44px}.filter-bottom{gap:10px;margin-top:15px}.topic-filters{gap:5px}.topic-chip{font-size:10px;min-height:36px;padding:7px 10px}.sort-label{margin-left:0}.sort-label select{height:32px}.result-info{margin-top:14px;font-size:10px}.activity-grid{grid-template-columns:1fr;gap:20px}.card-visual{height:183px}.activity-art{padding:1px 13px}.card-content{padding:23px 23px 14px}.card-content h3{font-size:27px;max-width:310px;margin-top:13px}.card-content>p{font-size:12px;line-height:1.85;margin-bottom:19px;max-width:330px}.card-topic{font-size:9px}.card-bottom>span{font-size:10px}.card-open{width:36px;height:32px}.save-button{width:39px;height:39px;right:13px;top:12px}.save-button .icon{width:17px;height:17px}.specimen-number{left:20px;font-size:7px}.teaching-banner{margin-left:21px;margin-right:21px;margin-bottom:37px;padding:26px;gap:18px}.banner-symbol{width:42px;height:42px}.banner-symbol .icon{width:23px;height:23px}.teaching-banner>div:nth-child(2){flex-basis:100%;order:1}.teaching-banner .eyebrow{font-size:8px;max-width:245px}.teaching-banner h2{font-size:29px;max-width:270px;line-height:1.1;margin-top:11px}.teaching-banner p{font-size:11px;line-height:1.9;margin-top:12px}.teaching-banner .button{margin-left:0;order:2;min-height:44px;font-size:11px}.site-footer{padding:28px 21px 32px;flex-direction:column;gap:22px;margin:0 21px;padding-left:0;padding-right:0}.footer-brand{font-size:22px}.site-footer p{margin-top:10px;font-size:11px}.footer-links{font-size:10px;gap:10px}.footer-links span{font-size:8px}.activity-page{padding-top:19px}.activity-heading{grid-template-columns:1fr;margin-top:18px;gap:24px}.activity-heading .eyebrow{font-size:8px}.activity-heading h1{font-size:40px;margin:13px 0 16px;max-width:380px}.activity-deck{font-size:13px}.activity-meta{font-size:9px;gap:13px;margin-top:19px}.detail-art{height:153px;max-width:100%}.activity-heading .activity-art{padding:0 25px}.detail-actions{align-items:start;flex-wrap:wrap;margin:23px 0;gap:13px}.detail-actions .button{min-height:43px;font-size:10px;padding:10px 12px}.detail-actions>div{gap:8px}.detail-actions>.text-button{font-size:11px}.question-box{padding:20px;margin-bottom:26px}.question-box p{font-size:23px}.article-layout{gap:25px}.section-nav{gap:20px;font-size:10px;padding-bottom:18px}.article-section{padding:28px 0}.article-section h2{font-size:29px}.article-section p{font-size:13px;line-height:1.85}.objectives-list li{font-size:13px;line-height:1.8}.materials-list label{font-size:12px;padding:14px 0}.procedure-list{gap:25px}.procedure-list li{gap:13px}.step-number{width:28px;height:28px;font-size:17px}.procedure-list h3{font-size:13px}.procedure-list p{font-size:12px}.study-sidebar{grid-template-columns:1fr;gap:5px}.sidebar-block{padding:24px}.care-block{padding:20px 7px}.care-block p{font-size:12px}.notebook-head{align-items:start;gap:12px}.notebook-head h2{font-size:28px}.notebook-head .button{min-height:42px;font-size:9px;gap:7px;padding:10px}.record-meta{grid-template-columns:1fr;gap:16px}.record-meta label,.field-notes{font-size:11px}.record-meta input,.record-meta select,textarea{font-size:13px;min-height:45px}.article-section .table-hint{font-size:10px}.record-controls>span{font-size:8px}.article-section .storage-note{font-size:10px}.analysis-box{padding:20px}.analysis-box p{font-size:12px}.discussion-list{font-size:20px;padding-left:20px;gap:17px}.extension-box{padding:20px}.extension-box p{font-size:12px}.references>p{font-size:11px}.references>a{font-size:11px}.next-activity{margin:20px 0 38px;align-items:start;flex-direction:column;padding:25px;gap:22px}.next-activity h2{font-size:29px;max-width:250px}.next-activity .button{font-size:11px}.page-intro{padding:34px 0}.page-intro h1{font-size:52px;margin:18px 0}.page-intro .eyebrow{font-size:8px;letter-spacing:1.3px}.page-intro>p{font-size:13px}.teaching-grid{grid-template-columns:1fr;gap:16px}.note-card{padding:25px}.note-card h2{font-size:29px}.note-card p{font-size:12px}.lesson-path{padding:35px 0}.lesson-path h2{font-size:31px}.path-options{grid-template-columns:1fr;gap:13px;margin-top:23px}.path-options a{padding:23px;gap:10px}.path-options span{font-size:12px}.path-options strong{font-size:11px}.source-note h2{font-size:28px}.source-note p{font-size:12px}.local-note{font-size:10px;align-items:start}.my-lab-page .section-heading h2{font-size:29px;max-width:none}.my-lab-page .section-heading{flex-wrap:wrap;align-items:center}.my-lab-page .section-heading .text-button{font-size:10px}.empty-state{padding:37px 22px}.empty-state h3{font-size:27px}.empty-state p{font-size:12px}.notebook-index{padding:35px 0}.notebook-index h2{font-size:29px}#toast{font-size:11px;bottom:18px;min-width:220px;text-align:center}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}.button:hover,.activity-card:hover{transform:none}}
@media print{body{background:white;font-size:11pt;color:#18271c}.site-header,.site-footer,.back-link,.detail-actions,.detail-art,.section-nav,.study-sidebar,.next-activity,#toast,.row-remove,.record-controls,.notebook-head>.button,.table-hint,.storage-note{display:none!important}.wrap{max-width:none;padding:0}.activity-page{padding:0}.activity-heading{display:block;margin:0}.activity-heading h1{font-size:28pt}.activity-deck{font-size:11pt}.article-layout{display:block}.article-section{padding:18px 0;break-inside:auto}.article-section h2{font-size:21pt;break-after:avoid}.article-section p,.objectives-list li,.materials-list label{font-size:10pt;color:#263528}.question-box{background:#eee;padding:15px;margin:20px 0}.question-box p{font-size:15pt}.procedure-list{gap:15px}.procedure-list li{break-inside:avoid}.procedure-list p{font-size:10pt}.table-scroll{overflow:visible}table{min-width:0;font-size:8pt}th{min-width:0;padding:7px}td input{min-width:0;padding:7px;font-size:8pt}.record-meta input,.record-meta select,textarea{border:1px solid #bbb;color:#18271c}a{text-decoration:none}.references{break-inside:avoid}.article-section .storage-note{display:block!important}h1,h2,h3{color:#18271c}.analysis-box,.extension-box{break-inside:avoid}.field-notes textarea{height:auto;min-height:90px}}
/* Keep visually hidden table labels inside the scroll container. */
.table-scroll{position:relative}
@media(max-width:560px){.save-button{width:44px;height:44px}.topic-chip{min-height:40px}.record-meta input,.record-meta select,textarea,td input{font-size:16px}.row-remove{min-height:44px}}
@media(max-width:360px){.hero h1{font-size:43px;line-height:1.06}.photo-caption i{font-size:21px}.hero .eyebrow{font-size:7px;letter-spacing:1.1px}.private-label{font-size:6px}}
/* Teacher notes and contributed investigations. */
.main-nav .share-nav{height:34px;padding:6px 11px;border:1px solid #ced7bd;border-radius:4px;color:#354f37;font-weight:600;background:#edf1e2;gap:10px}.main-nav .share-nav.active:after{display:none}.main-nav .share-nav.active{background:#dfe9c7}.teacher-notes-panel{background:#edf2df;border:1px solid #ccd9b5;border-radius:6px;padding:26px;margin:27px 0 6px;scroll-margin-top:25px}.teacher-notes-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:16px}.teacher-notes-heading h2{font-size:30px;margin:6px 0 0}.teacher-notes-heading .eyebrow{font-size:8px;color:#74875c}.private-note-tag{font-size:9px;border:1px solid #d1dbbd;padding:4px 8px;border-radius:4px;white-space:nowrap;color:#6d8058}.teacher-notes-panel>p{font-size:12px;line-height:1.85;margin-bottom:17px}.teacher-notes-panel textarea{background:#fffef9;line-height:1.8;font-size:12px;resize:vertical}.note-save-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:14px}.note-save-row .button{min-height:40px;font-size:10px;gap:8px;padding:10px 13px}.note-save-row .icon{width:15px;height:15px}.note-save-row>span{font-size:10px;color:#708358}.teacher-note-button .icon{width:16px;height:16px}.contribution-shelf{padding-top:10px;padding-bottom:50px}.contribution-shelf>section{padding:32px 0;border-top:1px solid var(--line)}.contribution-shelf>section>p{font-size:12px}.contribution-shelf .section-heading h2{font-size:31px}.shelf-empty,.loading-state{font-size:12px;color:#7b8b6b;padding:18px 0}.account-note{display:flex;justify-content:space-between;gap:20px;align-items:center;border-top:1px solid var(--line);padding:18px 0;margin-top:13px;max-width:820px}.account-note strong{font-size:12px;font-weight:550}.account-note p{font-size:11px;margin-top:7px;line-height:1.8;white-space:pre-line}.submission-list-item{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:21px 0;border-bottom:1px solid var(--line)}.submission-list-item>span:first-child{flex:1}.submission-list-item strong{font-family:var(--serif);font-size:23px;font-weight:400;letter-spacing:-.6px;line-height:1.3;display:block}.submission-list-item small{font-size:10px;color:#7c8c6e;display:block;margin-top:7px}.submission-status{font-size:9px;padding:5px 9px;border:1px solid #d4ddc5;border-radius:4px;white-space:nowrap;color:#74845f;background:#eef1e5}.status-approved{background:#e4efcf;color:#4f6c35}.status-needs_changes{background:#f2e9d7;color:#8a6c38}.teacher-collection{padding-top:0;padding-bottom:55px}.teacher-collection .section-heading{margin-bottom:16px}.teacher-collection>p{font-size:12px}.teacher-collection .button{font-size:11px}.teacher-collection .section-heading h2{font-size:33px}.collection-invitation{padding:25px;border:1px dashed #cdd8b9;background:#f0f3e8;border-radius:5px;margin-top:22px}.collection-invitation>span{font-family:var(--serif);font-size:24px;letter-spacing:-.5px}.collection-invitation p{font-size:12px;margin-top:9px}.collection-invitation a{margin-top:10px}.contribute-page .page-intro{max-width:780px}.contribute-page .page-intro h1{font-size:58px}.contribution-process{display:flex;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0;font-size:10px;color:#778967}.contribution-process span{display:flex;gap:10px;align-items:center}.contribution-process b{font-family:var(--serif);font-size:18px;font-weight:400;color:#879a6c}.contribution-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:65px;margin:35px 0 60px}.contribution-layout form{min-width:0}.contribution-layout fieldset{border:0;padding:0;margin:0;min-width:0}.contribution-form-section{padding:0 0 30px;margin-bottom:30px;border-bottom:1px solid var(--line)}.contribution-form-section h2{font-size:31px;margin-bottom:25px}.lab-field-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.lab-field{display:flex;flex-direction:column;gap:8px;font-size:11px;font-weight:550;margin-bottom:22px}.lab-field-grid .lab-field{margin:0;min-width:0}.full-width{grid-column:1/-1}.lab-field input,.lab-field select,.lab-field textarea{padding:11px 12px;border:1px solid #d1dbc2;border-radius:4px;background:var(--surface);font-size:13px;min-height:44px;min-width:0;max-width:100%;width:100%;font-weight:400}.lab-field textarea{line-height:1.85;resize:vertical}.field-help{display:block;font-size:10px;font-weight:400;color:#80906f;line-height:1.8}.form-help{font-size:12px;line-height:1.85;margin-bottom:18px}.photo-upload-zone{display:flex;flex-direction:column;align-items:center;gap:10px;padding:28px 20px;border:1px dashed #a8bc8b;border-radius:5px;background:#eef3e4;cursor:pointer}.photo-upload-zone>.icon{transform:rotate(180deg);width:23px;height:23px;color:#7b945b}.photo-upload-zone strong{font-size:13px;font-weight:550}.photo-upload-zone>span{font-size:10px;color:#82936e}.photo-upload-zone input{font-size:11px;max-width:100%;margin-top:7px}.photo-upload-zone+.field-help{margin-top:13px}.photo-draft-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin-top:22px}.draft-photo{border:1px solid var(--line);border-radius:5px;overflow:hidden;background:var(--surface)}.draft-photo>img{display:block;width:100%;height:165px;object-fit:cover}.draft-photo>div{padding:15px}.draft-photo label{font-size:10px;display:flex;flex-direction:column;gap:7px}.draft-photo textarea{font-size:12px;line-height:1.7;resize:vertical}.draft-photo .text-button{font-size:9px;margin-top:10px}.draft-photo .icon{width:12px;height:12px}.contribution-bottom{display:flex;justify-content:space-between;align-items:start;gap:20px;flex-wrap:wrap}.contribution-bottom>div:last-child{display:flex;gap:8px}.contribution-bottom .button{font-size:11px}.contribution-bottom [role=status]{font-size:11px;color:#6c8156}.contribution-bottom p{font-size:10px;margin-top:6px;max-width:320px}.contribution-aside{align-self:start;position:sticky;top:25px;border-left:1px solid var(--line);padding-left:20px}.contribution-aside .care-block{padding:12px 0 25px}.contribution-aside .care-block h3{font-size:24px}.contribution-aside .care-block p{font-size:11px}.contributed-preview{padding-top:28px;padding-bottom:60px}.preview-notice{display:flex;flex-direction:column;gap:7px;padding:20px 24px;background:#f0eddd;border:1px solid #e0dac1;border-radius:5px;margin:20px 0 35px}.preview-notice strong{font-size:12px;font-weight:550}.preview-notice span{font-size:11px;color:#8a856c}.approved-notice{background:#e8f1db;border-color:#d1ddbd}.approved-notice span{color:#788b61}.contributed-lab-heading{max-width:820px;margin:30px 0}.contributed-lab-heading .eyebrow{font-size:9px;color:#7b8d68}.contributed-lab-heading h1{font-size:50px;margin:17px 0 21px}.contributed-lab-heading>p{font-size:14px;line-height:1.9}.contributor-byline{font-size:11px;color:#758866;margin-top:20px}.contributor-byline span{display:block;margin-top:7px;color:#8d9a7e;font-size:10px}.contributed-guide{max-width:850px}.contributed-text{white-space:pre-line;font-size:13px;color:#687a5d;line-height:1.95;overflow-wrap:anywhere}.contributed-photos{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:23px;max-width:1000px;margin:28px 0}.contributed-photos figure{margin:0;min-width:0}.contributed-photos img{max-height:380px;object-fit:contain;max-width:100%;display:block;border-radius:5px;background:#e6ebde;width:100%}.contributed-photos figcaption{font-size:11px;color:#80916e;margin-top:10px;line-height:1.8;white-space:pre-line}.submit-review-box,.review-controls{padding:28px;background:#edf3e3;border:1px solid #d1ddbf;border-radius:5px;margin-top:36px;max-width:850px}.submit-review-box h2,.review-controls h2{font-size:31px;margin:10px 0 15px}.submit-review-box p,.review-controls p{font-size:12px;line-height:1.9}.submit-review-box .button{margin-top:22px;font-size:12px}.submit-review-box [role=status],.review-controls [role=status]{margin-top:15px;font-size:12px;color:#6a7c53}.review-controls>div{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}button:disabled{opacity:.6;transform:none!important}#lab-photo-error{color:#9b4c36;font-size:12px;margin-top:12px}
@media(max-width:1050px){.main-nav{gap:18px}.header-inner{gap:20px}.contribution-layout{gap:32px;grid-template-columns:minmax(0,1fr) 220px}}
@media(max-width:800px){.main-nav{gap:15px}.main-nav .share-nav{font-size:10px;padding:6px 9px;gap:6px}.contribution-layout{grid-template-columns:1fr}.contribution-aside{display:grid;grid-template-columns:1fr 1fr;gap:25px;position:static;padding:0;border:0}.contribute-page .page-intro h1{font-size:49px}.contributed-lab-heading h1{font-size:42px}.teacher-notes-panel h2{font-size:27px}.teacher-collection .section-heading{flex-wrap:wrap}}
@media(max-width:560px){.main-nav{justify-content:space-between;gap:0;height:48px}.main-nav>a{font-size:10px;gap:4px}.main-nav .share-nav{font-size:9px;padding:6px 7px;gap:5px;height:30px}.main-nav>a.active:after{bottom:0}.teacher-notes-panel{padding:20px;margin-top:23px}.teacher-notes-heading{align-items:start;gap:12px}.teacher-notes-heading h2{font-size:27px}.private-note-tag{font-size:7px;padding:3px 5px}.teacher-notes-panel textarea{font-size:16px;line-height:1.8}.note-save-row{gap:12px}.note-save-row .button{font-size:11px;min-height:44px}.note-save-row>span{font-size:9px;max-width:100%}.detail-actions>div{flex-wrap:wrap}.detail-actions .teacher-note-button{order:-1}.contribution-shelf{padding-top:0;padding-bottom:35px}.contribution-shelf>section{padding:25px 0}.contribution-shelf .section-heading{flex-wrap:wrap}.contribution-shelf .section-heading h2{font-size:29px}.contribution-shelf .button{font-size:10px}.submission-list-item{gap:13px;flex-wrap:wrap}.submission-list-item>span:first-child{flex-basis:100%}.submission-list-item strong{font-size:24px}.submission-list-item>.icon{margin-left:auto}.submission-status{font-size:9px}.teacher-collection{padding-bottom:37px}.teacher-collection .section-heading h2{font-size:30px;max-width:100%}.teacher-collection .button{font-size:10px}.teacher-collection .eyebrow{font-size:8px}.teacher-collection .section-heading{gap:19px}.teacher-collection>p{font-size:11px}.collection-invitation{padding:22px}.collection-invitation>span{font-size:25px}.contribute-page .page-intro h1{font-size:46px}.contribution-process{flex-direction:column;gap:12px;padding:19px 0;font-size:11px}.contribution-process b{font-size:17px;min-width:20px}.contribution-layout{margin-top:27px;margin-bottom:35px;gap:32px}.contribution-form-section{margin-bottom:25px;padding-bottom:25px}.contribution-form-section h2{font-size:30px}.lab-field-grid{grid-template-columns:1fr;gap:20px}.lab-field{font-size:12px;margin-bottom:22px}.lab-field input,.lab-field select,.lab-field textarea{font-size:16px;min-height:46px}.field-help{font-size:10px}.photo-upload-zone{padding:24px 16px}.photo-upload-zone input{font-size:11px}.photo-draft-grid{grid-template-columns:1fr;gap:17px}.draft-photo>img{height:190px}.draft-photo label{font-size:11px}.draft-photo textarea{font-size:16px}.draft-photo .text-button{min-height:40px;font-size:11px}.contribution-bottom>div:last-child{width:100%}.contribution-bottom .button{font-size:11px;flex:1;padding:12px}.contribution-aside{grid-template-columns:1fr;gap:0}.contribution-aside .care-block p{font-size:12px}.contribution-aside .care-block h3{font-size:26px}.contributed-preview{padding-top:22px;padding-bottom:35px}.preview-notice{padding:19px;margin:17px 0 25px}.preview-notice span{font-size:11px;line-height:1.85}.contributed-lab-heading{margin:25px 0}.contributed-lab-heading h1{font-size:39px}.contributed-lab-heading>p{font-size:13px}.contributor-byline{font-size:11px;line-height:1.9}.contributed-guide .article-section{padding:26px 0}.contributed-text{font-size:13px;line-height:1.9}.contributed-photos{grid-template-columns:1fr;gap:21px;margin:25px 0}.contributed-photos img{max-height:350px}.contributed-photos figcaption{font-size:11px}.submit-review-box,.review-controls{padding:22px;margin-top:28px}.submit-review-box h2,.review-controls h2{font-size:29px}.submit-review-box p,.review-controls p{font-size:12px}.submit-review-box .button{width:100%}.review-controls .button{font-size:11px}.teacher-notes-panel>p{font-size:12px}}
@media print{.teacher-note-button,.teacher-notes-panel,.share-nav,.contribution-aside,.contribution-process,.contribution-bottom,.submit-review-box,.review-controls{display:none!important}}
/* Teacher account entry and sign-in return flow. */
.header-account{display:flex;align-items:center;gap:12px;flex-shrink:0}.header-account-link{font-size:10px;font-weight:600;padding:9px 12px;border:1px solid #bdcba9;border-radius:4px;color:#345039;white-space:nowrap;background:#e8efda}.header-account-link:hover{background:#dce8c4}.account-page{display:grid;grid-template-columns:1.15fr .85fr;gap:85px;align-items:start;padding-top:70px;padding-bottom:80px;min-height:70vh}.account-intro>.eyebrow{color:#7e8f6c;font-size:9px}.account-intro h1{font-size:59px;line-height:1.05;margin:23px 0}.account-intro>p{max-width:440px;font-size:13px;line-height:1.95}.account-benefits{display:grid;gap:25px;margin-top:35px;max-width:460px}.account-benefits>div{display:flex;gap:16px;align-items:start}.account-benefits .icon{width:21px;height:21px;color:#7e965d;margin-top:3px}.account-benefits strong{display:block;font-size:12px;font-weight:550}.account-benefits small{display:block;font-size:11px;color:#829170;line-height:1.85;margin-top:5px}.account-card{padding:33px;background:var(--surface);border:1px solid #d6dfc8;border-radius:7px;box-shadow:0 9px 30px #2c3d2810;margin-top:7px;min-width:0}.account-card>.eyebrow{font-size:8px;color:#81916e;letter-spacing:1.4px}.account-card h2{font-size:34px;margin:19px 0 17px}.account-card>p{font-size:12px;line-height:1.95}.account-card [role=status]{font-size:11px;color:#859574;margin-top:22px}.account-continue{display:flex;width:100%;font-size:12px;justify-content:space-between;gap:10px;min-height:47px}.account-new-user{font-size:11px;color:#7b8c68;line-height:1.9;margin-top:19px}.account-new-user strong{font-weight:600;color:#567044}.account-secondary{display:block;font-size:11px;text-align:center;padding:14px 0;margin-top:8px;color:#72875d}.account-secondary:hover{text-decoration:underline;text-underline-offset:4px}.account-card-foot{border-top:1px solid var(--line);padding-top:22px;margin-top:22px}.account-card-foot p{font-size:9px;line-height:1.9;margin-top:10px;color:#8d9a7e}.account-ready{display:flex;align-items:center;gap:8px;font-size:11px;color:#658346;margin-bottom:18px}.account-ready .icon{width:16px;height:16px}.account-signout{border-top:1px solid var(--line);text-align:center;padding-top:18px;margin-top:13px}.account-signout a{font-size:10px;text-decoration:underline;text-underline-offset:4px}.account-error{font-size:12px;line-height:1.8;margin-bottom:18px}.shelf-empty .text-button{margin-top:9px}.account-continue:focus-visible{outline-offset:4px}
@media(max-width:1050px){.header-inner{gap:16px}.main-nav{gap:16px}.header-account{gap:8px}.header-account .private-label{display:none}.header-account-link{font-size:9px;padding:8px 10px}.account-page{gap:45px}.account-intro h1{font-size:51px}.account-card{padding:26px}}
@media(max-width:800px){.account-page{gap:30px;grid-template-columns:1fr 1fr;padding-top:48px;padding-bottom:50px}.account-intro h1{font-size:43px}.account-card{padding:24px}.account-card h2{font-size:29px}.account-benefits{gap:21px}.main-nav{gap:11px}.header-inner{gap:15px}.header-account-link{font-size:8px;padding:8px}.account-continue{font-size:10px}.account-benefits strong{font-size:11px}.account-benefits small{font-size:10px}}
@media(max-width:680px){.account-page{grid-template-columns:1fr;gap:32px}.account-intro h1{font-size:52px}.account-card{max-width:500px;width:100%;padding:30px}.account-card h2{font-size:33px}.account-continue{font-size:12px}.account-benefits{margin-top:25px}.account-benefits strong{font-size:12px}.account-benefits small{font-size:11px}.header-inner{flex-wrap:wrap;height:auto;padding-top:18px;gap:15px}.site-header{height:auto}.main-nav{order:3;height:43px;flex-basis:100%;justify-content:space-between;gap:12px;border-top:1px solid var(--line)}.main-nav>a.active:after{bottom:0}.header-account .private-label{display:inline-flex;font-size:7px;padding:4px 6px}.header-account{gap:8px}.header-account-link{font-size:10px;padding:8px 12px}.header-inner .brand{margin-right:auto}}
@media(max-width:560px){.header-inner{gap:12px;justify-content:space-between;padding-top:17px}.header-account{flex-direction:column-reverse;align-items:flex-end;gap:5px}.header-account-link{font-size:9px;min-height:34px;padding:7px 10px}.header-account .private-label{font-size:6px;padding:2px 4px;min-height:14px;gap:4px}.header-account .private-label svg{height:8px;width:8px}.main-nav{height:46px;gap:0}.account-page{padding-top:34px;padding-bottom:40px;gap:30px}.account-intro>.eyebrow{font-size:8px;letter-spacing:1.3px}.account-intro h1{font-size:46px;margin:19px 0}.account-intro>p{font-size:13px}.account-benefits{gap:19px;margin-top:26px}.account-benefits>div{gap:13px}.account-benefits strong{font-size:12px}.account-benefits small{font-size:11px}.account-card{padding:24px;margin-top:0}.account-card h2{font-size:32px}.account-card>.eyebrow{font-size:7px;letter-spacing:1.25px}.account-card>p{font-size:12px}.account-continue{min-height:48px;font-size:11px}.account-new-user{font-size:11px}.account-secondary{font-size:11px;min-height:44px}.account-card-foot p{font-size:10px}.account-signout a{font-size:11px;display:inline-block;min-height:35px;padding-top:7px}.account-card [role=status]{font-size:11px}.header-inner .brand{margin-right:0}}
@media(max-width:360px){.header-inner .brand strong{font-size:10px}.header-inner .brand small{font-size:6px;letter-spacing:1.6px}.header-inner .brand-mark{width:33px;height:33px}.header-inner .brand{gap:7px}.header-account-link{font-size:8px;padding:7px 8px}.account-intro h1{font-size:40px}.account-card{padding:21px}.account-card h2{font-size:29px}.account-continue{font-size:10px}}
@media print{.header-account{display:none!important}}
/* Keep the account action in the first phone screen. */
@media(max-width:680px){.account-benefits{display:none}.account-page{gap:24px}.account-intro h1{margin:17px 0}.account-intro>p{font-size:12px}}
@media(max-width:560px){.header-account .private-label{display:none}.header-account-link{min-height:40px;font-size:10px;padding:9px 10px}.account-page{padding-top:28px}.account-intro h1{font-size:43px}}
@media(max-width:360px){.header-account-link{font-size:9px;padding:9px}.account-intro h1{font-size:38px}}
.teaching-tips-panel{margin:32px 0;padding:28px;border:1px solid var(--line,#d9dfd2);border-radius:8px;background:#f6f7ef}.teaching-tips-panel h2{font-size:30px;margin:8px 0 12px}.teaching-tip{padding:20px 0;border-top:1px solid #d9dfd2}.teaching-tip blockquote{margin:0 0 10px;white-space:normal;overflow-wrap:anywhere;font-family:Georgia,serif;font-size:18px;line-height:1.6}.tip-credit{font-size:13px;color:#607058}.tip-compose{padding-top:24px;margin-top:20px;border-top:1px solid #cbd7bf}.tip-compose[hidden]{display:none}.tip-compose label{display:block;margin-bottom:18px;font-size:14px;font-weight:600}.tip-compose input:not([type=checkbox]),.tip-compose textarea{display:block;width:100%;margin-top:8px;padding:12px;border:1px solid #bcc9b3;border-radius:4px;background:white;font:inherit;color:#263d30}.tip-compose textarea{resize:vertical;font-weight:400}.tip-compose .tip-consent{display:flex;align-items:flex-start;gap:12px;font-weight:400;line-height:1.5}.tip-consent input{margin-top:5px;flex:none}.tip-actions{display:flex;flex-wrap:wrap;gap:12px;margin:14px 0}.teacher-notes-panel #share-note-tip{margin-top:18px}.teaching-tips-panel #own-tips h3{margin-top:30px}.teaching-tips-panel #tip-status{font-size:14px}@media(max-width:600px){.teaching-tips-panel{padding:20px}.tip-actions .button{width:100%;justify-content:center}.teaching-tip blockquote{font-size:17px}}