:root{color-scheme:light;--ink:#182d2b;--muted:#596b67;--paper:#f6f5ef;--line:#ccd4cc;--accent:#13795c}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 system-ui,sans-serif}a{color:inherit;text-underline-offset:5px}a:focus-visible{outline:3px solid #df8b25;outline-offset:5px}header,footer{display:flex;justify-content:space-between;gap:24px;max-width:1180px;margin:auto;padding:28px 32px}header{border-bottom:1px solid var(--line);font-size:13px}header>a{text-decoration:none;font-weight:750;letter-spacing:2px}.brand span{display:inline-block;background:var(--ink);color:var(--paper);padding:2px 10px;margin-right:10px;letter-spacing:0}main{max-width:1180px;margin:auto;padding:0 32px}.intro{display:grid;grid-template-columns:1.7fr 1fr;gap:80px;padding:80px 0}.eyebrow{font-size:12px;font-weight:700;letter-spacing:2px;color:var(--accent);margin:0 0 18px}h1{font-size:clamp(42px,5.3vw,68px);line-height:1.08;letter-spacing:-3px;margin:0 0 28px;font-weight:650}.lead{max-width:600px;color:var(--muted);font-size:19px}.note{background:#183b32;color:#eaf2de;padding:28px;align-self:center;border-radius:3px;transform:rotate(1deg)}.mono{font:13px monospace;display:block;border-bottom:1px solid #6f9385;padding-bottom:12px;margin-bottom:20px;color:#aec7b9}.note code{display:block;font:15px/1.8 monospace}.note code span{color:#e8c474}.note p{font-size:13px;line-height:1.8;color:#bed0c4;margin-bottom:0}.collection-head{display:flex;justify-content:space-between;align-items:end;border-bottom:2px solid var(--ink);padding-bottom:24px;gap:20px}.collection-head h2{font-size:34px;letter-spacing:-1px;line-height:1.2;margin:0}.collection-head .eyebrow{margin-bottom:10px}.collection-head>p{font-size:14px;color:var(--muted);white-space:nowrap}.lesson{display:grid;grid-template-columns:66px 1fr auto;gap:24px;align-items:start;padding:27px 4px;border-bottom:1px solid var(--line)}.number{font:23px/1.4 monospace;color:var(--accent)}h3{font-size:22px;margin:0;font-weight:600;line-height:1.4}h3 a{text-decoration:none}h3 a:hover{text-decoration:underline}h3 a span{margin-left:12px;color:var(--accent)}.lesson p{margin:5px 0;color:var(--muted);font-size:14px}.links{display:flex;gap:22px;font-size:12px;margin-top:14px}.state{font-size:11px;letter-spacing:.4px;margin-top:5px;color:var(--muted)}.state.ready{color:var(--accent);font-weight:700}.state.ready:before{content:'●';margin-right:7px}.pending h3{color:#65746d}.pending .number{color:#7e8c84}.how{display:grid;grid-template-columns:1fr 2fr;gap:0 60px;padding:65px 0}.how h2{font-size:27px;margin:0}.how p{margin:0 0 14px}.how .muted{grid-column:2;color:var(--muted);font-size:13px}footer{border-top:1px solid var(--line);font-size:12px;color:var(--muted)}@media(max-width:700px){header,footer{padding:22px}header>span{display:none}main{padding:0 22px}.intro{grid-template-columns:1fr;gap:25px;padding:45px 0}.note{transform:none}.lead{font-size:17px}h1{letter-spacing:-2px}.collection-head{display:block}.collection-head>p{margin-bottom:0}.lesson{grid-template-columns:36px 1fr;gap:12px}.lesson .state{grid-column:2;margin-top:0}h3{font-size:19px}.how{grid-template-columns:1fr;gap:16px;padding:40px 0}.how .muted{grid-column:1}footer{display:block}footer>a{display:block;margin-top:8px}}