:root{color-scheme:dark;--bg:#0b1717;--text:#f0f1e7;--muted:#a4b6ae;--lime:#dbed99;--line:#ffffff20}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif;font-size:16px}button,input,select{font:inherit}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--lime);outline-offset:5px}[hidden]{display:none!important}a{color:inherit}.site-header{max-width:1480px;margin:auto;padding:25px 40px;display:flex;align-items:center;gap:30px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;font-size:36px;font-weight:800;letter-spacing:-2px;display:flex;align-items:center;gap:22px}.brand span{font-size:11px;letter-spacing:2px;font-weight:400;border-left:1px solid var(--line);padding-left:22px}.client{margin-left:auto;font-size:12px;letter-spacing:2px}.client span{font-size:10px;color:var(--muted);letter-spacing:1px}.quiet{background:none;border:0;padding:10px;color:#c0cdc4;font-size:14px}.quiet:hover{color:var(--lime)}main{max-width:1480px;margin:auto;padding:32px 40px 0}.lesson-heading{display:flex;align-items:center;justify-content:space-between;margin:0 0 32px}.eyebrow{font-size:11px;font-weight:600;letter-spacing:2px;color:var(--lime);display:block;line-height:1.6}h1{font-family:Georgia,serif;font-size:clamp(36px,4vw,58px);font-weight:400;letter-spacing:-2px;margin:7px 0 0}h1 span{color:var(--lime)}.lesson-heading>p{font-size:14px;line-height:1.8;color:var(--muted)}.progress{display:flex;margin-bottom:20px;max-width:660px}.progress span{flex:1;border-top:2px solid #ffffff18;padding-top:12px;font-size:12px;color:#8aa299}.progress b{font-weight:400;font-size:10px;margin-right:7px}.progress [aria-current]{border-color:var(--lime);color:var(--lime)}.progress 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