:root{--green:#315a35;--lime:#96b847;--ink:#223529;--muted:#68756b;--line:#dfe5db;--bg:#f5f6f0;--white:#fff;--red:#a13131}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}button,input,select,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--line);background:white;border-radius:9px;padding:10px 16px;color:var(--ink);font-weight:600}button:hover{background:#edf2e8}button:disabled{opacity:.5;cursor:wait}.primary{background:var(--green);border-color:var(--green);color:white}.primary:hover{background:#23452a}.danger{color:var(--red)}.small{font-size:13px;padding:6px 10px}.link{border:0;background:transparent;color:var(--green);padding:8px 0}a{color:var(--green)}h1,h2,h3,p{margin-top:0}h1{font-size:34px;line-height:1.2;letter-spacing:-1px;margin-bottom:12px}h2{font-size:22px;line-height:1.3}h3{font-size:17px;margin-bottom:8px}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:11px;font-weight:800;color:var(--green)}.brand{width:172px;height:auto;display:block}.shell{display:grid;grid-template-columns:244px minmax(0,1fr);min-height:100vh}.sidebar{background:white;border-right:1px solid var(--line);padding:32px 24px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column}.brand-wrap{padding:0 0 32px}.brand-wrap small{font-size:10px;letter-spacing:2px;color:var(--muted)}nav{display:grid;gap:8px}nav button{text-align:left;border:0;background:transparent;font-weight:500}nav button.active{background:#eaf0df;color:var(--green);font-weight:750}.side-bottom{margin-top:auto;padding-top:32px;font-size:12px;overflow-wrap:anywhere}.side-bottom button{margin-top:10px}.main{padding:0 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strong{display:block;overflow-wrap:anywhere}.number{background:#f0f3ea;width:32px;height:32px;display:grid;place-items:center;border-radius:8px;font-size:12px;flex-shrink:0}.subheading{margin:30px 0 18px}.table-wrap{overflow:auto}.table{border-collapse:collapse;width:100%;text-align:left;white-space:nowrap}.table td,.table th{padding:14px 12px;border-bottom:1px solid var(--line);font-size:13px}.table th{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:1px}.table td small{display:block;color:var(--muted)}.search{max-width:340px;margin-bottom:20px}.progress{height:5px;background:#e4eadc;border-radius:5px;margin:14px 0 7px;overflow:hidden}.progress meter{width:100%;height:10px;display:block;margin-top:-3px;accent-color:var(--green)}.hero{background:var(--green);color:white;border-radius:16px;padding:32px;margin-bottom:28px;position:relative;overflow:hidden}.hero .eyebrow{color:#c8df9b}.hero h2{font-size:27px;max-width:600px}.hero p{color:#d5e2d0;max-width:540px;margin-bottom:0}.player-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px}.video-box{background:#13221a;border-radius:12px;overflow:hidden;aspect-ratio:16/9;display:grid;place-items:center;color:white}.video-box video,.video-box iframe{width:100%;height:100%;border:0}.video-box p{padding:20px;text-align:center}.lesson-info{padding:24px 0}.description{white-space:pre-wrap;overflow-wrap:anywhere}.playlist{padding:20px}.playlist details{border-bottom:1px solid var(--line);padding:12px 0}.playlist summary{cursor:pointer;font-weight:700;font-size:13px}.playlist button{display:flex;width:100%;text-align:left;gap:10px;border:0;font-size:13px;font-weight:400;margin-top:5px;background:transparent}.playlist button.selected{background:#edf3e6;color:var(--green);font-weight:700}.notice{background:#edf3e4;border:1px solid #d4e0c4;border-radius:10px;padding:14px 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