:root{color-scheme:light;--ink:#12372e;--deep:#0e4638;--green:#197a5f;--lime:#d9ff70;--cream:#f6faee;--paper:#fffef8;--line:#a9c9ba;--violet:#7a2ea8;--amber:#ffc94d;--muted:#52665f;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink)}a{color:inherit}.skip-link{position:fixed;z-index:20;top:8px;left:8px;transform:translateY(-160%);padding:10px;background:white}.skip-link:focus{transform:none}.site-header{position:sticky;z-index:10;top:0;display:flex;align-items:center;justify-content:space-between;min-height:64px;padding:10px clamp(16px,4vw,56px);border-bottom:3px solid var(--lime);background:var(--deep);color:white}.brand{font-size:1.15rem;font-weight:900;text-decoration:none}.brand span{color:var(--lime)}.brand b{margin-left:7px;font-size:.68rem;letter-spacing:.16em}.site-header nav{display:flex;gap:16px;font-weight:800}.site-header nav 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solid var(--line);background:#eff9f0}.chapters{display:grid;gap:0;margin:38px 0;padding:0;list-style:none}.chapters li{display:grid;grid-template-columns:72px 1fr;gap:16px;border-top:1px solid var(--line);padding:22px 0}.chapters li>span{color:var(--violet);font:900 .75rem ui-monospace,monospace}.chapters h3{margin:0 0 7px}.chapters p{margin:0;color:var(--muted);line-height:1.6}.reading-panel aside{border-left:5px solid var(--amber);padding:18px;background:var(--paper)}.interactive-panel{background:var(--paper)}.panel-head{display:flex;justify-content:space-between;gap:20px;align-items:start}.panel-head>span{max-width:250px;border-radius:999px;padding:9px 12px;background:#edf5ef;color:var(--muted);font-size:.78rem;font-weight:800}form{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:34px 0}label{display:grid;gap:7px;color:var(--deep);font-size:.82rem;font-weight:900}label:has(textarea),.check,.form-actions{grid-column:1/-1}input,textarea{width:100%;border:2px solid var(--line);border-radius:10px;padding:12px;background:white;color:var(--ink);font:inherit}textarea{min-height:112px;resize:vertical}.check{display:flex;align-items:center}.check input{width:18px}.form-actions{display:flex;flex-wrap:wrap;gap:8px}.form-actions button{padding-inline:16px}.request-preview{overflow:hidden;border:2px solid var(--deep);border-radius:14px;background:#102d27;color:#f6fff9}.request-preview>div{display:flex;gap:10px;padding:12px;border-bottom:1px solid #3e645a}.request-preview span{color:var(--lime);font-weight:950}.request-preview pre{overflow:auto;margin:0;padding:18px;white-space:pre-wrap}.resource-head{display:flex;align-items:center;justify-content:space-between;margin:34px 0 14px}.resource-head h3{margin:0}.lesson-list{display:grid;gap:10px}.lesson-card{display:grid;grid-template-columns:1fr auto;gap:16px;border:1px solid var(--line);border-radius:12px;padding:16px;background:#fbfff7}.lesson-card h4{margin:0 0 6px}.lesson-card p{margin:0;color:var(--muted);line-height:1.45}.lesson-card small{display:block;margin-top:8px;font-weight:800}.lesson-card-actions{display:flex;gap:6px}.lesson-card button{align-self:start;border:1px solid var(--deep);border-radius:7px;padding:7px 9px;background:white;color:var(--deep);font-weight:800;cursor:pointer}.empty{color:var(--muted)}.response-console{margin-top:26px;border-radius:12px;background:#142c27;color:white}.response-console summary{cursor:pointer;padding:14px 18px;font-weight:900}.response-console pre{overflow:auto;margin:0;border-top:1px solid #41645b;padding:18px;color:#d9ff70;white-space:pre-wrap}footer{display:flex;justify-content:space-between;gap:20px;padding:28px clamp(18px,5vw,72px);background:var(--deep);color:white}button:disabled{cursor:not-allowed;opacity:.5}:focus-visible{outline:3px solid var(--violet);outline-offset:3px}body[data-mode=reading] .interactive-panel{display:none}body[data-mode=reading] .lab-grid{grid-template-columns:1fr}body[data-mode=reading] .reading-panel{border-right:0}.reading-panel{display:block}
@media(max-width:900px){.hero,.session-strip,.lab-grid{grid-template-columns:1fr}.session-actions{width:100%}.reading-panel{border-right:0;border-bottom:1px solid var(--line)}h1{line-height:.92}.panel-head{display:grid}form{grid-template-columns:1fr}label{grid-column:1/-1}}
@media(max-width:520px){.site-header{align-items:flex-start}.site-header nav{display:grid;gap:5px;text-align:right}.hero,.reading-panel,.interactive-panel,.session-strip{padding-inline:16px}.session-actions{grid-template-columns:1fr}.session-actions code{grid-column:auto}.lesson-card{grid-template-columns:1fr}.chapters li{grid-template-columns:58px 1fr}footer{display:grid}}
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