@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#f6f7f3;--ink:#243b35;--muted:#697970;--green:#25634e;--lime:#d8ee9b;--line:#e0e6dc;--white:#fff;--orange:#ba714c}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.65 'DM Sans',sans-serif}h1,h2,h3,.brand{font-family:Manrope,sans-serif;line-height:1.2}a{color:inherit}button,input,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #8baf42;outline-offset:3px}aside{width:248px;background:#fff;position:fixed;height:100vh;border-right:1px solid var(--line);padding:35px 24px;display:flex;flex-direction:column}.brand{text-decoration:none;display:flex;gap:12px;align-items:center;font-size:21px;font-weight:800}.logo{background:var(--green);color:#fff;border-radius:13px;width:43px;height:45px;text-align:center;font-size:31px}.logo span{font-size:20px}.lab{display:block;font-size:11px;letter-spacing:2px;font-weight:500;margin-top:6px}.workspace{font-size:10px;letter-spacing:1.4px;color:#859187;margin:55px 10px 15px}nav{display:grid;gap:8px}nav a{display:flex;gap:13px;text-decoration:none;padding:12px;border-radius:9px;color:var(--muted);font-size:14px}nav a.active{background:#edf3e6;color:var(--green);font-weight:700}.side-bottom{margin-top:auto;padding:22px 10px 0}.seed{font-size:36px;color:#78994f}.side-bottom b{font-size:14px}.side-bottom p{font-size:11px;color:var(--muted)}small{font-size:11px;color:var(--muted)}.shell{margin-left:248px}header{height:83px;border-bottom:1px solid var(--line);padding:0 48px;display:flex;align-items:center;justify-content:space-between;font-size:10px;letter-spacing:1px}.slash{padding:0 13px;color:#b5bfb4}.private{border:1px solid var(--line);border-radius:20px;padding:5px 12px;font-size:10px;letter-spacing:0;color:var(--green)}main{max-width:1320px;margin:auto;padding:40px 48px 60px;min-height:80vh}h1{font-size:40px;font-weight:800;letter-spacing:-1.5px;margin:10px 0 14px}h2{font-size:23px;letter-spacing:-.5px}h3{font-size:18px}p{margin:10px 0 16px}.muted{color:var(--muted)}.eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:700;color:var(--green);text-transform:uppercase}.intro{display:flex;justify-content:space-between;align-items:end;margin-bottom:28px}.intro p{margin-bottom:0}.hero{background:#203e33;color:#fff;border-radius:19px;padding:35px 38px;display:grid;grid-template-columns:1.5fr 1fr;gap:20px;overflow:hidden;position:relative}.hero h2{font-size:32px;max-width:510px;line-height:1.3;margin:12px 0}.hero p{color:#bccfc1;max-width:450px;font-size:14px}.hero .eyebrow{color:#c5df97}.hero a{position:relative;z-index:1}.hero-art{display:flex;align-items:center;justify-content:center;position:relative;min-height:220px}.orb{width:210px;height:210px;border:1px solid #627a5f;border-radius:50%;position:relative;display:grid;place-items:center}.orb:before{content:'';position:absolute;inset:22px;border:1px solid #627a5f;border-radius:50%}.orb:after{content:'↗';font-size:102px;color:var(--lime);transform:rotate(-10deg)}.floating{position:absolute;background:#f3f5e7;color:var(--green);border:1px solid #bdd0a8;border-radius:10px;padding:9px 15px;font-size:11px;box-shadow:0 10px 25px #142a3040}.float-a{left:0;top:20px}.float-b{right:-5px;bottom:20px}.button{display:inline-flex;gap:14px;align-items:center;justify-content:center;padding:11px 19px;border-radius:8px;text-decoration:none;border:1px solid transparent;background:var(--green);color:#fff;font-size:13px;font-weight:700}.button.light{background:var(--lime);color:#263e30}.button.secondary{background:#fff;border-color:var(--line);color:var(--ink)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0 35px}.stat{padding:20px 23px;background:#fff;border:1px solid var(--line);border-radius:12px}.stat b{font:800 25px Manrope,sans-serif}.stat span{font-size:12px;color:var(--muted);display:block;margin-top:5px}.stat .track{margin-top:10px}.track{height:5px;background:#edf0e8;border-radius:10px;overflow:hidden}.track i{display:block;height:100%;background:#7fa358}.section-top{display:flex;justify-content:space-between;align-items:center;gap:15px}.section-top a{font-size:12px;color:var(--green)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:23px;display:flex;flex-direction:column;transition:transform .2s,border-color .2s}.card:hover{transform:translateY(-3px);border-color:#a3b69c}.number{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;display:grid;place-items:center;font-weight:700;color:var(--green);background:#f4f7ed}.card .eyebrow{font-size:9px;margin-top:20px;letter-spacing:1px}.card h3{line-height:1.45;margin:8px 0}.card p{font-size:12px;color:var(--muted);flex:1}.card a{font-size:12px;text-decoration:none;font-weight:700;display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;margin-top:10px}.badge{display:inline-block;border:1px solid #d4dfca;border-radius:20px;color:var(--green);background:#f1f6ea;padding:3px 9px;font-size:10px}.notice{padding:20px 24px;background:#edf1e6;border-radius:11px;font-size:13px;margin-top:25px}.toolbar{display:flex;gap:15px;margin:25px 0;flex-wrap:wrap}.toolbar input{flex:1;min-width:220px;border:1px solid var(--line);border-radius:9px;padding:12px 15px;background:#fff}.filters{display:flex;gap:8px;flex-wrap:wrap}.filters button{border:1px solid var(--line);padding:8px 13px;background:#fff;border-radius:25px;font-size:12px}.filters button.selected{background:var(--green);color:#fff}.group-title{margin:32px 0 16px;font-size:14px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:28px}.lesson-main{background:#fff;border:1px solid var(--line);border-radius:14px;padding:35px}.lesson-main h1{font-size:33px}.lesson-main h2{font-size:21px;margin-top:32px}.lesson-main p{font-size:15px;line-height:1.85}.lesson-top{display:flex;justify-content:space-between;margin-bottom:25px;font-size:12px}.lesson-top a{text-decoration:none}.goal{border-left:3px solid #8ba958;padding:8px 18px;background:#f6f8f0;margin:25px 0}.example{background:#f9f4e9;border:1px solid #ede2ca;border-radius:10px;padding:20px}.example p{font-size:14px}.example .eyebrow{color:#9a7044}.exercise{border-top:1px solid var(--line);margin-top:30px;padding-top:5px}textarea{width:100%;min-height:155px;resize:vertical;border:1px solid #cfd9c9;border-radius:9px;padding:15px;line-height:1.7;background:#fcfdf9;color:var(--ink)}.save-status{font-size:11px;color:var(--muted)}.rubric{display:grid;gap:10px;margin:18px 0}.rubric label{font-size:13px;display:flex;align-items:center;gap:10px}.rubric input{accent-color:var(--green);width:17px;height:17px}.quiz{background:#f4f7ef;padding:22px;border-radius:12px;margin-top:28px}.quiz h2{margin-top:0}.options{display:grid;gap:9px}.options button{background:#fff;border:1px solid var(--line);text-align:left;border-radius:8px;padding:12px 15px;font-size:13px;color:var(--ink)}.options button.correct{background:#dcebd1;border-color:#769b62}.options button.wrong{background:#fae8df;border-color:#cc987c}.feedback{font-size:13px;margin:12px 0 0}.lesson-side{align-self:start;position:sticky;top:20px}.side-box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;margin-bottom:17px}.side-box h3{font-size:14px;margin:0 0 14px}.side-box p{font-size:12px;color:var(--muted)}.source-link{display:block;width:100%;text-align:left;background:none;border:0;border-bottom:1px solid var(--line);padding:12px 0;color:var(--green);font-size:12px;text-decoration:none}.source-link small{display:block;font-size:10px}.bottom-actions{margin-top:25px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.source-row{padding:22px;background:#fff;border:1px solid var(--line);border-radius:10px;margin:12px 0}.source-row h3{margin:7px 0;font-size:17px}.source-row p{font-size:13px;color:var(--muted)}.source-row button{background:none;border:0;color:var(--green);padding:0;text-decoration:underline}.note-card{border:1px solid var(--line);background:#fff;border-radius:12px;padding:25px;margin:15px 0}.note-card pre{white-space:pre-wrap;font:14px/1.7 'DM Sans',sans-serif}.empty{padding:45px;text-align:center;border:1px dashed #b9c9ae;border-radius:12px}.gap-list li{margin-bottom:10px}footer{padding:25px 48px;border-top:1px solid var(--line);font-size:10px;color:var(--muted);display:flex;justify-content:space-between;gap:15px}dialog{border:1px solid var(--line);border-radius:15px;max-width:780px;width:90vw;max-height:85vh;padding:32px;color:var(--ink)}dialog::backdrop{background:#14291f99}dialog pre{white-space:pre-wrap;font:14px/1.8 'DM Sans',sans-serif}.close{position:sticky;top:0;float:right;background:#edf2e6;border:0;border-radius:50%;height:32px;width:32px;font-size:22px}#toast{position:fixed;bottom:25px;left:50%;background:var(--ink);color:white;border-radius:10px;padding:12px 20px;display:none;font-size:13px;z-index:20}.skip{position:absolute;left:-9999px}.skip:focus{left:260px;top:10px;z-index:50;background:white;padding:10px}@media(min-width:1450px){main{padding-top:50px}.hero{padding:42px}.hero h2{font-size:37px}}@media(max-width:1100px){aside{width:205px;padding:25px 16px}.shell{margin-left:205px}main{padding:30px}.lesson-layout{grid-template-columns:1fr}.lesson-side{position:static;display:grid;grid-template-columns:1fr 1fr;gap:15px}.cards{grid-template-columns:repeat(2,1fr)}.hero-art{min-width:160px}.orb{width:160px;height:160px}.floating{font-size:9px}header{padding:0 30px}}@media(max-width:700px){aside{position:static;width:100%;height:auto;padding:18px 20px}.brand{font-size:19px}.workspace,.side-bottom{display:none}nav{display:flex;overflow:auto;margin-top:18px;gap:5px}nav a{white-space:nowrap;padding:8px 11px;font-size:12px}nav a span{display:inline}.shell{margin:0}header{height:55px;padding:0 20px;font-size:9px}.private{font-size:9px}main{padding:25px 20px 40px}h1{font-size:32px}.hero{grid-template-columns:1fr;padding:27px}.hero h2{font-size:28px}.hero-art{display:none}.stats{gap:8px}.stat{padding:15px 12px}.stat b{font-size:21px}.stat span{font-size:10px}.cards{grid-template-columns:1fr}.lesson-main{padding:22px}.lesson-main h1{font-size:29px}.lesson-side{grid-template-columns:1fr}.intro{display:block}.intro>.badge{margin-top:15px}.section-top h2{font-size:20px}footer{padding:22px;display:block}footer span{display:block}.lesson-top{gap:12px}.source-row{overflow-wrap:anywhere}}