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28px;display:flex;position:relative}.handout-card:nth-child(2) .handout-cover{background:#f2ebdd}.handout-card:nth-child(3) .handout-cover{background:#e6eee9}.cover-number{letter-spacing:.1em;color:#607377;font-size:12px;position:absolute;top:22px;left:26px}.handout-cover svg{width:100%;max-height:300px}.cover-formula{color:#397d7b;margin-top:15px;font-size:24px}.handout-content{padding:30px 34px}.handout-meta{color:#607377;flex-wrap:wrap;gap:12px;font-size:12px;display:flex}.handout-meta span:first-child{color:#b65843}.handout-content h3{color:#286461;margin:16px 0 12px;font-size:31px;font-weight:400;line-height:1.3}.handout-content h3 a:hover{color:#b65843}.handout-summary{color:#607377;margin:0;font-size:15px;line-height:1.85}.method-tags{flex-wrap:wrap;gap:7px;margin:18px 0;padding:0;list-style:none;display:flex}.method-tags li{color:#397d7b;border:1px solid #cbd8d3;border-radius:3px;padding:4px 8px;font-size:12px}.keyword-line{color:#607377;margin:16px 0;font-size:13px;line-height:1.8}.keyword-line b{color:#25383b;margin-bottom:3px;font-weight:400;display:block}.lesson-prep{color:#607377;font-size:13px}.lesson-prep summary{cursor:pointer;color:#397d7b}.lesson-prep p{margin:9px 0;line-height:1.8}.lesson-prep a{text-decoration:underline}.handout-action{border-top:1px solid #cbd8d3;justify-content:space-between;align-items:center;gap:20px;margin-top:20px;padding-top:20px;display:flex}.handout-action>span{color:#607377;font-size:11px}.handout-action>a{color:#286461;white-space:nowrap;font-size:15px}.handout-action>a>span{margin-left:12px}.version-guide{background:#e8efea;border-left:3px solid #397d7b;margin-top:40px;padding:28px 32px;scroll-margin-top:30px}.version-guide h2{margin:0 0 14px;font-size:22px;font-weight:400}.version-guide p{color:#607377;max-width:1050px;font-size:14px;line-height:1.9}.version-guide a{color:#397d7b;font-size:13px;text-decoration:underline}.lesson-empty{text-align:center;color:#607377;padding:60px 20px}.lesson-empty h3{color:#286461}[hidden]{display:none!important}.library-switch a:focus-visible,.lesson-collection :is(a,button,input,select,summary):focus-visible{outline-offset:4px;outline:3px solid #c89139}@media (width<=1000px){.library-intro{grid-template-columns:1fr;gap:20px}.library-lead{justify-self:start}.lesson-filters{gap:14px}.stage-filters{width:100%}.handout-content{padding:26px}.handout-action{flex-wrap:wrap}.handout-card{grid-template-columns:.85fr 1.15fr}}@media (width<=680px){.library-intro,.library-switch,.lesson-collection{width:calc(100% - 32px)}.library-intro{padding:32px 0 28px}.library-lead{font-size:14px}.library-switch{margin-bottom:30px}.library-switch>a{gap:10px;padding:18px 13px}.library-switch b{font-size:18px}.library-switch small{font-size:11px}.switch-number{font-size:12px}.switch-arrow{display:none}.collection-heading{display:block}.collection-heading h2{font-size:24px}.collection-heading>p{margin-top:12px!important}.lesson-filters label{grid-template-columns:32px 1fr;width:100%;display:grid}.lesson-search input{width:100%}.stage-filters{gap:5px}.stage-filters button{flex:1;padding:8px 10px}.collection-meta{align-items:start;gap:10px;font-size:12px}.handout-card{grid-template-columns:1fr}.handout-cover{padding:42px 20px 22px}.handout-cover svg{max-height:230px}.cover-formula{margin-top:6px;font-size:22px}.handout-content{padding:24px}.handout-content h3{font-size:28px}.handout-action{gap:14px}.version-guide{padding:24px 20px}.version-guide h2{font-size:20px}}