@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700&family=DM+Sans:wght@400;500;600;700&display=swap');
:root{--paper:#f5f4ee;--surface:#fffefa;--ink:#203027;--muted:#81877f;--line:#dddfd4;--green:#19271f;--orange:#ed784c;--soft:#e9ecdf;--side:240px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;font-size:14px;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a{color:inherit;text-decoration:none}button{color:inherit}button:focus-visible,a:focus-visible{outline:2px solid var(--orange);outline-offset:4px}input:focus,select:focus,textarea:focus{outline:2px solid #ed784c80;outline-offset:2px}button{border:0;background:none}svg{display:block;width:19px;height:19px}button svg{flex-shrink:0}[hidden]{display:none!important}.sidebar{width:var(--side);height:100dvh;background:var(--green);position:fixed;inset:0 auto 0 0;color:#dce3d7;display:flex;flex-direction:column;padding:35px 23px 22px;z-index:30}.brand{display:flex;gap:11px;align-items:center;font-family:'Barlow Condensed',sans-serif;font-size:27px;font-weight:600;letter-spacing:1.1px;line-height:1.1;margin-bottom:53px}.brand-icon{font:46px/1 sans-serif;color:var(--orange);margin-top:-3px}.brand-sub{display:block;font-family:inherit;font-size:10px;font-weight:400;color:#98a695;letter-spacing:2.1px;margin-top:6px}.side-label{font-size:10px;color:#80927e;letter-spacing:1px;margin:0 12px 16px}.nav-item{width:100%;display:flex;align-items:center;gap:12px;font-size:13px;text-align:left;color:#aebba8;min-height:45px;border-radius:5px;padding:0 13px;margin-bottom:6px}.nav-item.active{color:#f2f4e9;background:#2c3d2e}.nav-item.active svg{color:#e9aa76}.nav-item:hover{background:#2a3a2c}.nav-item svg{width:17px;height:17px}.nav-arrow{margin-left:auto;color:var(--orange);font-size:18px}.nav-count{margin-left:auto;font-size:10px;background:#3d4c38;color:#c7d1be;border-radius:4px;padding:2px 5px}.side-divider{height:1px;background:#344132;margin:26px 12px}.quick-topics{display:flex;flex-direction:column;gap:14px;padding:0 12px}.quick-topics button{text-align:left;padding:0;font-size:11px;color:#95a58e;line-height:1.6}.quick-topics button:hover{color:var(--orange)}.sidebar-bottom{margin-top:auto;padding-top:36px}.side-note{display:flex;gap:13px;margin:0 12px 28px}.tiny-cross{color:var(--orange);font-size:26px;font-weight:400}.side-note p{font-size:11px;color:#9eae97;line-height:1.9;margin:0}.side-foot{border-top:1px solid #344132;padding:20px 12px 0;font:9px 'DM Sans',sans-serif;letter-spacing:.6px;color:#7f9279;display:flex;justify-content:space-between}.side-foot span{color:#acba9e}.workspace{margin-left:var(--side)}.topbar{height:76px;display:flex;align-items:center;padding:0 43px;gap:20px;border-bottom:1px solid var(--line);background:var(--paper)}.breadcrumb{font-size:9px;letter-spacing:1.35px;color:#828a7e;flex:1}.breadcrumb span{margin:0 17px;color:#b8beb1}.breadcrumb b{font-weight:500;color:#596652;letter-spacing:1px}.top-add{display:flex;align-items:center;gap:7px;font-size:11px}.top-add svg{width:14px;height:14px}.avatar{background:#e6e9dd;border:1px solid #d0d7c7;border-radius:50%;width:30px;height:30px;display:grid;place-items:center;font-family:'Barlow Condensed',sans-serif;font-weight:600;font-size:15px}.menu-toggle{display:none!important}main{padding:37px 43px 0;max-width:1700px;margin:auto}.hero{display:grid;grid-template-columns:1.06fr 1fr;gap:22px;min-height:349px;margin-bottom:46px}.hero-copy{padding:10px 0 0}.eyebrow{font-size:10px;letter-spacing:1.6px;font-weight:500;display:flex;align-items:center;gap:8px}.live-dot{width:6px;height:6px;border-radius:50%;background:var(--orange)}h1,h2,h3,p{margin-top:0}.hero h1{font-size:clamp(29px,2.8vw,43px);line-height:1.43;letter-spacing:-1.5px;margin:19px 0 14px;font-weight:650}.orange{color:var(--orange)}.hero-copy>p{font-size:12px;line-height:1.95;color:#798170;margin-bottom:25px}.primary{display:inline-flex;justify-content:center;align-items:center;gap:33px;background:var(--orange);color:#17251d;min-height:43px;padding:0 19px;font-weight:600;font-size:12px;border-radius:3px;transition:background .18s}.primary:hover{background:#f78c62}.primary span{font-size:18px;font-weight:400}.hero-bottom{display:flex;gap:11px;align-items:center;font-size:9px;color:#959b8e;margin-top:21px}.hero-bottom i{width:3px;height:3px;background:#b0b7a5;border-radius:50%}.hero-visual{position:relative;background:#19251f;border-radius:7px;overflow:hidden;min-width:0;display:flex;flex-direction:column}.hero-visual img{width:100%;height:270px;object-fit:contain;flex:1;min-height:0}.visual-top{font:8px 'DM Sans',sans-serif;color:#8d9a86;letter-spacing:1.3px;display:flex;justify-content:space-between;padding:20px 20px 0;z-index:1}.visual-top span:last-child{color:#66765e}.visual-caption{display:flex;gap:8px;align-items:center;font-size:10px;letter-spacing:.5px;color:#b6c1ab;padding:0 20px 17px}.visual-dot{width:5px;height:5px;border:1px solid var(--orange);border-radius:50%}.cross-decor{margin-left:auto;font-size:23px;line-height:1;color:#7b8c71}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:21px;gap:15px}.muted{color:#8b9383}.section-heading .eyebrow{font-size:9px;letter-spacing:1.5px;margin-bottom:9px}.section-heading h2{font-size:21px;letter-spacing:-.5px;margin:0;font-weight:600}.editor-note{font-size:10px;color:#919985;padding-bottom:2px}.editor-note span{font-size:15px;margin-left:7px}.discovery-tools{display:flex;gap:11px;margin-bottom:17px}.search-box{flex:1;display:flex;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:0 13px;gap:10px;min-width:0;height:43px}.search-box svg{color:#7f8977;width:16px;height:16px}.search-box input{background:none;border:0;min-width:0;width:100%;font-size:11px;color:var(--ink);outline:none}.search-box input:focus{outline:0}.search-box:focus-within{border-color:var(--orange)}input::placeholder{color:#a0a694}.search-box kbd{color:#a1aa95;border:1px solid #e1e4d8;font-size:9px;padding:1px 5px;border-radius:2px}.discovery-tools select{font-size:11px;border:1px solid var(--line);border-radius:4px;background:var(--surface);padding:0 27px 0 13px;height:43px;color:#65715c;max-width:150px}.filter-row{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:10px}.topic-tabs{display:flex;gap:22px;overflow:auto;scrollbar-width:none}.topic-tabs button{padding:0 0 13px;position:relative;color:#87917c;font-size:11px;white-space:nowrap}.topic-tabs button.active{color:var(--ink);font-weight:600}.topic-tabs button.active:after{content:'';height:2px;position:absolute;left:0;right:0;bottom:0;background:var(--ink)}.text-button{padding:0;font-size:10px;color:#818c77}.text-button:hover{color:#c66b42}.clear-filters{white-space:nowrap;padding-bottom:13px}.results-line{font-size:9px;color:#9ba38f;display:flex;justify-content:space-between;padding:17px 0 16px}.results-line span:first-child{color:#73816a}.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px 20px}.video-card{min-width:0}.thumb-wrap{position:relative;aspect-ratio:16/9;background:#d8decd;border-radius:5px;overflow:hidden}.thumbnail{width:100%;height:100%;object-fit:cover;display:block;transition:transform .25s}.thumb-open{display:block;position:absolute;inset:0;width:100%;padding:0}.thumb-open:hover .thumbnail{transform:scale(1.04)}.thumb-shade{position:absolute;inset:40% 0 0;background:linear-gradient(transparent,#0009);pointer-events:none}.card-map{position:absolute;bottom:10px;left:11px;background:#f5f4eeeb;color:#2b3d28;font-size:9px;padding:4px 7px;letter-spacing:.5px;border-radius:2px;pointer-events:none}.bookmark-button{position:absolute;right:9px;top:9px;border-radius:3px;display:grid;place-items:center;background:#17251dcc;color:white;width:28px;height:28px}.bookmark-button svg{width:14px;height:14px}.bookmark-button.bookmarked{color:var(--orange);background:#17251df0}.bookmark-button.bookmarked svg{fill:currentColor}.play-circle{position:absolute;left:50%;top:50%;width:35px;height:35px;border-radius:50%;background:#17251dbd;color:#fff;display:grid;place-items:center;transform:translate(-50%,-50%);opacity:0;transition:opacity .2s}.play-circle svg{width:15px;height:15px}.thumb-open:hover .play-circle,.thumb-open:focus-visible .play-circle{opacity:1}.card-body{padding:12px 1px 0}.card-meta{display:flex;align-items:center;gap:6px;font-size:9px;color:#8d9783;margin-bottom:8px}.card-topic{color:#ba6540}.card-meta i{font-style:normal;color:#bcc3b3}.completed-pill{margin-left:auto;color:#647e4f;font-size:9px}.card-title{font-size:13px;font-weight:600;line-height:1.65;text-align:left;padding:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:43px}.card-title:hover{color:#c56d45}.card-desc{font-size:10px;color:#818c76;line-height:1.8;margin:6px 0 11px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:36px}.creator-line{border-top:1px solid #e4e6dc;padding-top:9px;display:flex;align-items:center;justify-content:space-between;color:#7b8771;font-size:9px;gap:10px}.creator-line .creator{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.creator-line .creator:before{content:'';display:inline-block;width:5px;height:5px;border-radius:50%;background:#a9b69a;margin-right:5px}.creator-line button{color:#66785b;font-size:10px;padding:0;white-space:nowrap}.practice-banner{margin:40px 0 0;display:flex;align-items:center;gap:23px;background:#e9eddf;border:1px solid #dce2cf;border-radius:5px;padding:26px}.practice-mark{font:47px/1 'Barlow Condensed',sans-serif;letter-spacing:-2px;padding-right:22px;border-right:1px solid #cdd6bf;color:#728266}.practice-mark span{display:block;font:9px 'DM Sans',sans-serif;letter-spacing:3px;text-align:center;margin-top:5px}.practice-banner .eyebrow{font-size:8px;margin-bottom:8px}.practice-banner h3{font-size:16px;font-weight:600;margin-bottom:7px}.practice-banner p{font-size:10px;color:#7c8970;line-height:1.8;margin:0}.secondary{display:inline-flex;gap:18px;justify-content:center;align-items:center;min-height:37px;border:1px solid #b9c4ad;border-radius:3px;padding:0 14px;font-size:10px;white-space:nowrap}.secondary:hover{background:#dce3d1}.practice-banner>.secondary{margin-left:auto}.footer{margin:45px 0 0;padding:25px 0;display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);gap:20px;color:#9aa28e;font-size:9px}.footer-brand{font:600 16px 'Barlow Condensed',sans-serif;letter-spacing:1px;color:#7b8970}.footer-brand .footer-tagline{font:9px 'DM Sans',sans-serif;letter-spacing:0;margin-left:10px;color:#99a18e}.footer>button{font-size:9px;color:#85917a}.page-intro{padding:18px 0 32px}.page-intro h1{font-size:38px;line-height:1.45;letter-spacing:-1.3px;font-weight:600;margin:18px 0 12px}.page-intro p{font-size:12px;color:#85907a;line-height:1.9;margin:0}.paths-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.path-card{background:var(--surface);border:1px solid var(--line);padding:27px;border-radius:6px}.path-top{display:flex;justify-content:space-between;color:#aab39d;font:600 35px 'Barlow 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p{font-size:12px;color:#87947b;line-height:1.8}.empty-state .secondary{margin-top:8px}.about-layout{display:grid;grid-template-columns:1.8fr 1fr;gap:65px}.about-copy h2{font-size:18px;font-weight:600;margin:0 0 13px}.about-copy h2:not(:first-child){margin-top:32px}.about-copy p{font-size:13px;color:#7d8974;line-height:2.1}.source-link{display:inline-block;margin-top:12px;font-size:12px;color:#bb6b42}.principles{background:#e9ecdf;padding:27px;height:fit-content;border-radius:5px}.principles>.eyebrow{color:#839175;margin-bottom:30px}.principles>div:not(.eyebrow){border-top:1px solid #d4dcc8;padding-top:19px;margin-top:22px}.principles b{font:24px 'Barlow Condensed',sans-serif;color:#9ba98d}.principles h3{font-size:16px;margin:6px 0}.principles p{font-size:11px;line-height:1.9;color:#849274;margin:0}dialog{color:var(--ink);background:var(--paper);border:0;border-radius:10px;box-shadow:0 20px 100px #08160d40;padding:0;max-height:92dvh}dialog::backdrop{background:#14241ed4;backdrop-filter:blur(4px)}.lesson-dialog{width:min(1050px,94vw)}.lesson-top{padding:24px 29px 20px;border-bottom:1px solid var(--line);position:relative}.lesson-top .eyebrow{font-size:9px;padding-right:30px}.lesson-top h2{font-size:23px;line-height:1.6;margin:12px 35px 7px 0;letter-spacing:-.5px}.lesson-source{font-size:10px;color:#8d9782;line-height:1.8;padding-right:10px}.lesson-source a{color:#a06e49;text-decoration:underline;text-underline-offset:3px}.dialog-close{position:absolute;right:20px;top:17px;font-size:29px;font-weight:300;z-index:2}.icon-button{padding:5px;width:33px;height:33px;display:grid;place-items:center;border-radius:3px}.icon-button:hover{background:#a4ae9826}.lesson-layout{display:grid;grid-template-columns:1.45fr 1fr}.lesson-watch{padding:25px 27px;border-right:1px solid var(--line)}.video-player{aspect-ratio:16/9;position:relative;background:#132019;border-radius:5px;overflow:hidden}.video-player img{width:100%;height:100%;object-fit:cover;opacity:.65}.video-player iframe{width:100%;height:100%;border:0}.video-player>button{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;color:#fff;font-size:11px;background:#12201830}.large-play{display:grid;place-items:center;border-radius:50%;background:var(--orange);height:54px;width:54px}.large-play svg{height:21px;width:21px;fill:currentColor}.player-caption{font-size:10px;color:#909b83;line-height:1.8;margin:10px 0 20px}.lesson-watch h3,.lesson-practice h3{font-size:14px;margin:20px 0 12px}.keypoints{padding-left:19px;margin:0;font-size:12px;line-height:2;color:#7c8970}.keypoints li{margin-bottom:9px}.editorial-label{font-size:9px!important;color:#939d88;line-height:1.9;margin:15px 0 0}.lesson-practice{padding:25px 25px;background:#eeefe6}.lesson-practice>.eyebrow{font-size:9px;color:#87967b}.lesson-practice h3{margin-top:15px;font-size:16px}.drill-item{display:flex;gap:10px;font-size:11px;color:#728467;line-height:1.9;padding:13px 0;border-bottom:1px solid #dadfce;cursor:pointer}.drill-item input{accent-color:#637e4f;margin:4px 0 0;width:14px;height:14px;flex-shrink:0}.note-label{display:block;margin:22px 0 9px;font-size:11px}.lesson-practice textarea{border:1px solid #d4dcc7;border-radius:4px;background:#f8f8f1;width:100%;height:93px;resize:vertical;padding:11px;font-size:11px;line-height:1.8;color:#66785b}.note-status{font-size:9px;color:#98a18b;margin:7px 0 20px}.lesson-actions{display:flex;flex-wrap:wrap;gap:9px}.lesson-actions .primary{font-size:11px;min-height:37px;padding:0 12px}.lesson-actions .secondary{font-size:10px;gap:7px;min-height:37px}.completion-hint{font-size:10px;color:#819376;line-height:1.9;margin-top:16px}.add-dialog{width:450px;padding:33px;max-width:92vw}.add-dialog h2{font-size:24px;margin:16px 0 10px}.form-help{font-size:12px;line-height:1.9;color:#87947c}.add-dialog label{display:block;font-size:11px;margin:19px 0;color:#6d7e61}.add-dialog input,.add-dialog select{display:block;width:100%;height:41px;border:1px solid var(--line);border-radius:4px;padding:0 11px;margin-top:8px;background:var(--surface);font-size:11px}.add-dialog .primary{width:100%;margin-top:5px}#form-error{font-size:11px;color:#bd613f}.toast{position:fixed;bottom:30px;left:calc(50% + 100px);transform:translateX(-50%);max-width:90vw;background:#25392b;color:#f3f5ec;font-size:12px;padding:14px 23px;border-radius:5px;box-shadow:0 5px 30px #16291d25;z-index:100;white-space:normal;line-height:1.6}.mobile-overlay{display:none}
@media(min-width:1550px){main{padding-top:45px}.hero{min-height:390px}.hero-visual img{height:320px}.hero-copy{padding-top:25px}.hero h1{font-size:44px}.hero-copy>p{font-size:14px}.hero-bottom{font-size:10px}.card-title{font-size:15px}.card-desc{font-size:12px;min-height:43px}.card-meta,.creator-line{font-size:10px}.hero{margin-bottom:50px}}
@media(max-width:1150px){:root{--side:210px}.sidebar{padding-left:17px;padding-right:17px}.brand{font-size:24px}.brand-icon{font-size:39px}main{padding:28px 28px 0}.topbar{padding:0 28px}.hero{gap:18px;min-height:330px}.hero h1{font-size:30px;letter-spacing:-1px}.hero-copy>p{font-size:11px}.hero-visual img{height:240px}.visual-top{font-size:7px;padding-left:14px;padding-right:14px;letter-spacing:.5px}.video-grid{gap:23px 15px}.topic-tabs{gap:17px}.practice-banner{padding:21px;gap:18px}.practice-banner p{max-width:300px}.editor-note{font-size:9px}.about-layout{gap:35px}}
@media(max-width:900px){:root{--side:190px}.sidebar{padding-left:12px;padding-right:12px}.brand{font-size:22px;gap:8px}.brand-icon{font-size:34px}.side-label{font-size:9px}.quick-topics button{font-size:10px}.hero{grid-template-columns:1fr 1fr;min-height:300px}.hero h1{font-size:26px}.hero-copy{padding-top:4px}.eyebrow{font-size:9px}.hero-visual img{height:200px}.hero-bottom{font-size:8px;gap:8px}.visual-caption{font-size:9px;padding-left:14px;padding-right:14px}.visual-top span:first-child{max-width:110px;line-height:1.5}.video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.breadcrumb{font-size:8px;letter-spacing:.7px}.breadcrumb span{margin:0 8px}.topbar{gap:13px;height:65px}.editor-note{display:none}.practice-banner{flex-wrap:wrap}.practice-banner>.secondary{margin-left:72px}.practice-banner p{max-width:none}.paths-grid{grid-template-columns:1fr}.about-layout{grid-template-columns:1fr}.principles{display:none}.lesson-layout{grid-template-columns:1.2fr 1fr}.lesson-watch,.lesson-practice{padding:20px}.lesson-top h2{font-size:20px}.data-tools{gap:10px}.data-tools button{font-size:9px}.library-toolbar .topic-tabs{gap:15px}}
@media(max-width:650px){:root{--side:240px}.sidebar{transform:translateX(-100%);transition:transform .2s;padding:30px 23px 22px}.sidebar.open{transform:translateX(0)}.brand{font-size:27px}.brand-icon{font-size:43px}.side-label{font-size:10px}.quick-topics button{font-size:11px}.mobile-overlay{display:block;position:fixed;inset:0;background:#13231dbb;z-index:29}.workspace{margin-left:0}.topbar{height:60px;padding:0 19px;gap:12px}.menu-toggle{display:grid!important;padding-left:0}.breadcrumb{font-size:8px;letter-spacing:.5px;line-height:1.7;max-width:200px}.breadcrumb span,.breadcrumb b{display:none}.top-add{font-size:10px;gap:3px;margin-left:auto;white-space:nowrap}.avatar{width:26px;height:26px;font-size:13px;flex-shrink:0}main{padding:25px 20px 0}.hero{grid-template-columns:1fr;gap:24px;margin-bottom:34px}.hero-copy{padding-top:4px}.hero h1{font-size:34px;line-height:1.4;margin:17px 0 13px}.hero-copy>p{font-size:12px;line-height:1.9;margin-bottom:20px}.hero-bottom{font-size:9px;margin-top:16px}.hero-visual{height:245px;min-height:0}.hero-visual img{position:absolute;inset:9px 0 0;height:224px}.visual-top{padding:16px 16px 0;font-size:7px}.visual-top span:first-child{max-width:none}.visual-caption{position:absolute;bottom:0;left:0;right:0;font-size:9px;padding:10px 16px 13px;background:linear-gradient(transparent,#19251f 42%)}.section-heading h2{font-size:20px}.section-heading .eyebrow{font-size:8px}.discovery-tools{flex-wrap:wrap;gap:8px;margin-bottom:19px}.search-box{flex:1 1 100%;height:43px}.discovery-tools select{max-width:none;flex:1;height:36px;font-size:10px}.topic-tabs{gap:20px}.topic-tabs button{font-size:10px}.clear-filters{font-size:9px}.results-line{font-size:8px;padding:15px 0}.video-grid{gap:24px 13px}.card-map{font-size:8px;left:7px;bottom:7px;padding:3px 5px}.bookmark-button{width:25px;height:25px;right:6px;top:6px}.card-body{padding-top:10px}.card-meta{font-size:8px;gap:4px;margin-bottom:5px}.card-title{font-size:12px;line-height:1.65;min-height:40px;-webkit-line-clamp:2}.card-desc{font-size:9px;margin-top:5px;line-height:1.8;min-height:32px}.creator-line{font-size:8px;gap:4px;padding-top:8px}.creator-line button{font-size:9px}.creator-line .creator:before{display:none}.completed-pill{font-size:8px}.practice-banner{margin-top:30px;padding:20px 16px;gap:15px;align-items:start}.practice-mark{font-size:39px;padding-right:14px}.practice-mark span{font-size:8px}.practice-banner>div:nth-child(2){flex:1;min-width:0}.practice-banner h3{font-size:14px;line-height:1.7}.practice-banner p{font-size:10px}.practice-banner .eyebrow{font-size:7px;letter-spacing:.7px}.practice-banner>.secondary{margin-left:63px;font-size:10px;min-height:34px}.footer{margin-top:32px;flex-wrap:wrap;gap:17px;font-size:8px;padding-bottom:25px}.footer-brand{font-size:14px}.footer-brand .footer-tagline{font-size:8px;margin-left:5px}.footer>span{display:none}.footer>button{font-size:9px}.page-intro{padding-top:15px}.page-intro h1{font-size:30px}.page-intro p{font-size:11px}.paths-grid{gap:16px}.path-card{padding:23px}.library-toolbar{flex-direction:column;gap:16px}.data-tools{align-self:flex-end;padding-bottom:13px}.library-toolbar .topic-tabs{width:100%;gap:28px}.library-toolbar .topic-tabs button{font-size:12px}.about-copy h2{font-size:17px}.about-copy p{font-size:12px}.lesson-dialog{max-height:94dvh;border-radius:7px}.lesson-top{padding:23px 20px 19px}.lesson-top h2{font-size:19px}.lesson-top .eyebrow{font-size:8px}.lesson-source{font-size:9px}.lesson-layout{grid-template-columns:1fr}.lesson-watch{padding:20px;border-right:0;border-bottom:1px solid var(--line)}.lesson-practice{padding:23px 20px}.lesson-practice textarea{height:80px}.lesson-actions .primary{flex:1}.dialog-close{right:12px;top:14px}.add-dialog{padding:29px 23px}.add-dialog h2{font-size:22px}.toast{left:50%;font-size:11px;bottom:20px;width:max-content;max-width:90vw}.empty-state{padding:45px 18px}.empty-state h3{font-size:15px}.empty-state p{font-size:11px}}
#language-select{height:30px;border:1px solid #d8dece;border-radius:4px;background:transparent;padding:0 7px;font-size:11px;max-width:112px;color:#65745c}.chapter-list{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0 20px}.chapter-button{display:flex;gap:7px;align-items:center;min-height:30px;padding:5px 8px;border:1px solid #d5ddc9;border-radius:3px;font-size:10px;text-align:left;color:#6c805d}.chapter-button:hover{background:#e3e9d9}.chapter-button span:first-child{font-variant-numeric:tabular-nums;color:#bb6c47}.chapter-heading{font-size:10px;color:#7e8c71;margin:16px 0 8px}.card-desc{font-size:12px;line-height:1.8;min-height:43px}.card-title{font-size:14px;min-height:47px}.card-meta{font-size:10px}.creator-line{font-size:10px}.topic-tabs button{font-size:12px}.discovery-tools input,.discovery-tools select{font-size:12px}.results-line{font-size:10px}.hero-copy>p{font-size:13px}.hero h1{font-family:'DM Sans',-apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif}.sidebar .quick-topics button{line-height:1.8}.hero-visual .visual-top{font-size:8px}.lesson-source{font-size:11px}.keypoints{font-size:13px}.drill-item{font-size:12px}.lesson-practice textarea{font-size:12px}.lesson-practice .completion-hint{font-size:11px}.lesson-practice .lesson-actions{row-gap:10px}.hero-bottom{flex-wrap:wrap}.lesson-top h2{overflow-wrap:anywhere}
html[lang="en"] .hero h1{font-size:clamp(30px,3.05vw,46px);line-height:1.17;letter-spacing:-1.8px;margin:20px 0 17px;max-width:550px}html[lang="en"] .hero-copy>p{font-size:13px;max-width:380px;line-height:1.85}html[lang="en"] .hero-copy .eyebrow{font-size:9px;letter-spacing:1.3px}html[lang="en"] .topic-tabs{gap:23px}html[lang="en"] .section-heading h2{font-size:25px;letter-spacing:-.7px}html[lang="en"] .quick-topics button{font-size:11px}html[lang="en"] .hero-bottom{font-size:9px;gap:8px}html[lang="en"] .card-title{font-size:15px;line-height:1.5}html[lang="en"] .card-desc{font-size:12px;line-height:1.7;min-height:41px}html[lang="en"] .card-meta{font-size:10px}html[lang="en"] .nav-item{font-size:13px}html[lang="en"] .side-label{font-size:9px;letter-spacing:1px}html[lang="en"] .side-note p{font-size:11px}html[lang="en"] .practice-banner h3{font-size:19px;letter-spacing:-.4px}html[lang="en"] .practice-banner p{font-size:12px;line-height:1.7}html[lang="en"] .path-card>p{min-height:63px}html[lang="en"] .path-lesson{font-size:12px;line-height:1.7}html[lang="en"] .page-intro h1{font-size:42px}html[lang="en"] .lesson-top h2{font-size:24px;line-height:1.4}html[lang="en"] .lesson-practice h3{font-size:18px;line-height:1.5}html[lang="en"] .lesson-actions .primary{font-size:10px}html[lang="en"] .lesson-actions .secondary{font-size:10px}
@media(max-width:1150px){html[lang="en"] .hero h1{font-size:34px}html[lang="en"] .hero-copy>p{font-size:12px}html[lang="en"] .hero-bottom{font-size:8px}html[lang="en"] .topic-tabs{gap:18px}.breadcrumb{letter-spacing:.7px}html[lang="en"] .section-heading h2{font-size:22px}.card-desc{font-size:11px}html[lang="en"] .card-desc{font-size:11px}.card-title{font-size:13px}html[lang="en"] .card-title{font-size:14px}}
@media(max-width:900px){html[lang="en"] .hero h1{font-size:29px;letter-spacing:-1.1px}.breadcrumb{max-width:220px}.hero{min-height:320px}.hero-bottom{font-size:8px}html[lang="en"] .nav-item{font-size:12px}html[lang="en"] .quick-topics button{font-size:10px}.topbar{gap:12px}#language-select{font-size:10px;padding:0 5px}}
@media(max-width:650px){#language-select{max-width:83px;font-size:9px;padding:0 3px}.topbar{gap:9px}.breadcrumb{max-width:140px;font-size:7px;letter-spacing:.35px}.top-add{font-size:9px}.top-add svg{width:11px}.avatar{display:none}html[lang="en"] .hero h1{font-size:39px;line-height:1.12;letter-spacing:-1.7px;margin-top:18px;max-width:400px}html[lang="en"] .hero-copy>p{font-size:13px}html[lang="en"] .hero-bottom{font-size:9px;gap:8px}html[lang="en"] .hero-copy .eyebrow{font-size:8px}html[lang="en"] .section-heading h2{font-size:23px;line-height:1.3}html[lang="en"] .topic-tabs{gap:20px}.topic-tabs button{font-size:11px}.card-title,html[lang="en"] .card-title{font-size:13px;line-height:1.5;min-height:39px}.card-desc,html[lang="en"] .card-desc{font-size:11px;line-height:1.7;min-height:38px}.card-meta,html[lang="en"] .card-meta{font-size:9px}.creator-line{font-size:9px}.creator-line button{font-size:9px}.results-line{font-size:9px}.hero-copy>p{font-size:12px}.hero{min-height:0}.practice-banner p,html[lang="en"] .practice-banner p{font-size:11px}html[lang="en"] .practice-banner h3{font-size:17px}html[lang="en"] .page-intro h1{font-size:32px}html[lang="en"] .lesson-top h2{font-size:21px}.lesson-source{font-size:10px}.library-toolbar{gap:12px}.data-tools{gap:15px}.data-tools button{font-size:10px}.lesson-practice .completion-hint{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Brand wordmark: compact, two-tone lettering. */
.wordmark{font-family:'DM Sans',-apple-system,BlinkMacSystemFont,sans-serif;font-weight:800;letter-spacing:-1.1px;white-space:nowrap;line-height:1.1}.wordmark-tube{color:#ff7900}.brand .wordmark{font-size:30px}.brand-sub{letter-spacing:1.7px}.footer-brand .wordmark{font-size:20px}.footer-brand .wordmark-tube{font:inherit;letter-spacing:inherit;margin:0}
@media(max-width:1150px) and (min-width:651px){.brand .wordmark{font-size:27px}}