.lnav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:20px;padding:13px 28px;background:color-mix(in oklab,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}.lnav-back{display:inline-flex;align-items:center;gap:7px;font-family:var(--f-ui);font-size:13.5px;font-weight:600;color:var(--ink-2);background:transparent;border:none;padding:6px 10px 6px 6px;border-radius:8px;transition:color .15s,background .15s;white-space:nowrap;flex:none;text-decoration:none}.lnav-back:hover{color:var(--ink);background:var(--bg-2)}.lnav-mid{flex:1;display:flex;align-items:center;gap:11px;min-width:0}.lnav-belt{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:var(--cink);white-space:nowrap;flex:none;font-family:var(--f-ui)}.lnav-belt-dot{width:9px;height:9px;border-radius:50%;background:var(--c)}.lnav-sep{color:var(--ink-4)}.lnav-lesson{font-size:13px;font-family:var(--f-ui);color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lnav-dots{display:flex;gap:7px;flex:none}.lnav-dot{width:9px;height:9px;border-radius:50%;border:1.5px solid var(--line-2);background:transparent;display:block;transition:all .15s}.lnav-dot:hover{border-color:var(--ink-3)}.lnav-dot.done{background:var(--c);border-color:var(--c)}.lnav-dot.on{background:var(--c);border-color:var(--c);box-shadow:0 0 0 3px color-mix(in oklab,var(--c) 20%,transparent)}.lesson-grid{max-width:1100px;margin:0 auto;padding:0 28px;display:grid;grid-template-columns:minmax(0,1fr) 256px;gap:56px;align-items:start}.reading{padding:52px 0 80px;min-width:0}.reading>*{max-width:var(--maxread)}.lesson-top{margin-bottom:36px}.lesson-kicker{display:inline-flex;align-items:center;gap:8px;font-family:var(--f-mono);font-size:12px;letter-spacing:.04em;color:var(--cink);text-transform:uppercase}.lk-dot{width:8px;height:8px;border-radius:50%;background:var(--c)}.lesson-h{font-family:var(--f-ui);font-weight:800;letter-spacing:-.03em;font-size:clamp(30px,4vw,42px);line-height:1.08;margin:16px 0 0;color:var(--ink);text-wrap:balance}.lesson-dek{font-family:var(--f-serif);font-size:20px;line-height:1.55;color:var(--ink-2);margin:18px 0 0}.reading .prose{margin-top:0}.reading .prose h2{font-family:var(--f-ui);font-weight:700;font-size:22px;letter-spacing:-.02em;color:var(--ink);margin:40px 0 0}.reading .prose h2:first-child{margin-top:0}.reading .prose p{font-family:var(--f-serif);font-size:18.5px;line-height:1.72;color:#2c2a24;margin:16px 0 0;text-wrap:pretty}.reading .prose p b,.reading .prose p strong{font-weight:700;color:var(--ink)}.reading .prose p i,.reading .prose p em{font-style:italic}.reading .prose ul,.reading .prose ol{font-family:var(--f-serif);font-size:18px;line-height:1.68;color:#2c2a24;margin:14px 0 0;padding-left:26px}.reading .prose li{margin-top:6px}.reading .prose pre{--astro-code-background: var(--ed-bg);--astro-code-foreground: var(--sx-ident);--astro-code-token-keyword: var(--sx-keyword);--astro-code-token-string: var(--sx-string);--astro-code-token-string-expression: var(--sx-string);--astro-code-token-constant: var(--sx-number);--astro-code-token-comment: var(--sx-comment);--astro-code-token-punctuation: var(--sx-punct);--astro-code-token-function: var(--sx-ident);--astro-code-token-parameter: var(--sx-ident);--astro-code-token-link: var(--sx-string);border:1px solid var(--ed-line);border-radius:var(--r-sm);padding:16px 18px;overflow-x:auto;margin:20px 0 0;max-width:100%;box-shadow:var(--sh-1)}.reading .prose pre code{font-family:var(--f-mono);font-size:13.5px;line-height:1.65;background:none;border:none;padding:0;border-radius:0}.reading .prose :not(pre)>code{font-family:var(--f-mono);font-size:.86em;background:var(--bg-2);border:1px solid var(--line);padding:1px 6px;border-radius:5px;color:var(--ink)}.reading .prose hr{border:none;border-top:1px solid var(--line);margin:36px 0}.exercises-section{margin-top:52px}.lesson-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:44px 0 0;padding-top:28px;border-top:1px solid var(--line);flex-wrap:wrap}.rail{padding-top:52px}.rail-sticky{position:sticky;top:78px;display:flex;flex-direction:column;gap:16px}.schema-cards{display:flex;flex-direction:column;gap:10px}.schema{background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh-1)}.schema-head{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--line);color:var(--ink-2)}.schema-name{font-family:var(--f-mono);font-size:13px;font-weight:600;color:var(--ink)}.schema-cols-count{margin-left:auto;font-family:var(--f-mono);font-size:10.5px;color:var(--ink-4)}.schema-cols{list-style:none;margin:0;padding:6px}.schema-cols li{display:flex;align-items:baseline;justify-content:space-between;padding:6px 8px;border-radius:6px}.schema-cols li:hover{background:var(--bg-2)}.sc-name{font-family:var(--f-mono);font-size:12.5px;color:var(--ink)}.sc-type{font-family:var(--f-mono);font-size:10.5px;color:var(--ink-4)}@media(max-width:900px){.lesson-grid{grid-template-columns:minmax(0,1fr);gap:0}.rail{display:none}.reading{max-width:min(720px,100%);margin:0 auto}}@media(max-width:620px){.lesson-grid{padding:0 20px}.lnav{padding:12px 18px;gap:12px}.lnav-lesson{display:none}}