@import url(anthropic-fonts.css);
:root{--bg:#F6F4EF;--fg:#141413;--mut:#6A675F;--acc:#C96F51;--card:#fff;--line:#E1DDD3;--side:#EFECE5}

*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--fg);font:16px/1.65 "Styrene B",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:#8E4127;text-underline-offset:2px}a:hover{color:var(--acc)}.wrap{display:flex;min-height:100vh}
aside{width:300px;flex:none;background:var(--side);border-right:1px solid var(--line);padding:18px 14px;position:sticky;top:0;height:100vh;overflow:auto;font-size:.88rem}
aside h3{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--mut);margin:16px 0 4px}
aside a{display:block;padding:4px 8px;border-radius:6px;color:var(--fg);text-decoration:none}aside a:hover{background:var(--line)}aside a.cur{background:#141413;color:#fff}
aside .crumb{font-size:.8rem;margin-bottom:8px}aside .ctitle{font-weight:600;font-size:1rem;margin:4px 0 8px}
main{flex:1;min-width:0;padding:28px clamp(16px,4vw,48px) 80px;max-width:980px}
main img{max-width:100%;height:auto}main pre{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:10px}
main table{border-collapse:collapse;display:block;overflow-x:auto}main td,main th{border:1px solid var(--line);padding:6px 8px}
video{width:100%;max-width:900px;border-radius:10px;background:#000;margin:8px 0 18px}
.navbtns{display:flex;justify-content:space-between;gap:12px;margin-top:40px;border-top:1px solid var(--line);padding-top:16px}
.notes{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-top:24px}
.quiz .q{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:12px 0}
.quiz .ok{color:#2e7d32;font-weight:600}.quiz .no{color:var(--mut);text-decoration:line-through}.quiz .fb{font-size:.9rem;color:var(--mut);margin-top:6px}
.cards{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.card h3{margin:.2em 0 .4em}.mut{color:var(--mut)}.pill{display:inline-block;font-size:.75rem;border:1px solid var(--line);border-radius:99px;padding:1px 8px;margin:2px}
.offline-note{font-size:.85rem;color:var(--mut);border:1px dashed var(--line);border-radius:8px;padding:8px 12px}
@media (max-width:820px){.wrap{display:block}aside{position:static;width:auto;height:auto;border-right:0;border-bottom:1px solid var(--line)}}

h1,h2,main .lesson-top h2{font-family:Copernicus,Georgia,serif;font-weight:600;letter-spacing:-.01em}
h1{font-size:clamp(28px,4vw,38px);line-height:1.15}
aside .ctitle a{color:var(--fg);font-family:Copernicus,Georgia,serif;font-size:1.15rem}
.card,.notes,.quiz .q,main pre{box-shadow:0 1px 2px rgba(30,25,15,.06),0 6px 18px rgba(30,25,15,.05)}
blockquote{border-left-color:var(--acc)!important}