@font-face{font-family:Notebook Sans;src:url('./assets/fonts/noto-sans-hebrew-hebrew.woff2') format('woff2');font-weight:100 900;font-display:swap;unicode-range:U+0590-05FF,U+200C-2010,U+20AA,U+25CC,U+FB1D-FB4F}
@font-face{font-family:Notebook Sans;src:url('./assets/fonts/noto-sans-hebrew-latin.woff2') format('woff2');font-weight:100 900;font-display:swap}
:root{--ink:#252e2a;--muted:#62685f;--paper:#f6f3ec;--surface:#fffdf8;--line:#deded2;--accent:#315c49;--soft:#e9eee4;--rust:#9a4b32;font-family:Notebook Sans,system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}button{font:inherit;cursor:pointer}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--rust);outline-offset:5px}[hidden]{display:none!important}.skip-link{position:absolute;inset-inline-start:16px;top:-100px;background:var(--surface);padding:14px;z-index:10}.skip-link:focus{top:12px}.site-header,main,footer{width:min(1180px,calc(100% - 80px));margin:auto}.site-header{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:90px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:800}.brand img{border-radius:9px}.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted)}.site-header nav{display:flex;gap:26px;font-size:14px}.site-header nav a{text-decoration:none;padding:12px 0}.site-header 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span{color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}#lesson-nav a:hover{background:#eeeae0}#lesson-nav a[aria-current]{background:var(--soft);border-color:#cdd8c9;color:var(--accent);font-weight:750}.aside-link{display:block;color:var(--muted);font-size:12px;margin:24px 12px 0;text-decoration:none}#lesson{min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:34px 38px;box-shadow:0 8px 28px #343b2b05;scroll-margin-top:22px}.lesson-kicker{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--muted);font-size:11px;margin-bottom:18px}.lesson-kicker span:last-child{border:1px solid var(--line);border-radius:30px;padding:5px 9px}h2{font-family:Notebook Sans,system-ui,sans-serif;font-weight:400;font-size:34px;line-height:1.3;letter-spacing:normal;margin-bottom:14px}.lead{font-size:16px;line-height:1.65;color:var(--muted);max-width:55ch}.move{border-inline-start:3px solid var(--accent);padding-block:1px;padding-inline:15px 0;margin:25px 0}.move strong,.example-label{font-size:10px;text-transform:uppercase;letter-spacing:normal;color:var(--accent)}.move p{font-size:14px;line-height:1.6;margin:6px 0}.example{border-top:1px solid var(--line);padding-top:25px}.example-label{color:var(--muted);margin-bottom:12px}.example>p:not(.example-label){font-size:16px;line-height:1.6}.math{font-size:1.13rem;min-width:0;margin:18px 0;overflow-wrap:anywhere}.katex-display{margin:.7em 0!important;overflow:auto;max-width:100%;padding:6px 0}.katex-display>.katex{text-align:left!important}.steps{margin-top:26px}.step{border-top:1px solid var(--line);padding:18px 0}.step h3{font-size:14px;margin-bottom:8px}.step h3 span{display:inline-grid;place-items:center;background:var(--soft);border-radius:50%;width:24px;height:24px;font-size:11px;margin-inline-end:9px;color:var(--accent)}.step p{font-size:14px;line-height:1.7;margin-bottom:4px}.reveal-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:12px 0 25px}.primary{background:var(--accent);color:white;border:0;border-radius:6px;min-height:46px;padding:12px 18px;font-size:13px;font-weight:700}.primary:hover{background:#244633}.reset{background:none;border:0;text-decoration:underline;color:var(--muted);padding:12px;font-size:12px}.step-count{color:var(--muted);font-size:11px}.trap{background:#f6eee2;border-radius:7px;padding:17px 20px;margin-top:18px}.trap strong{color:#82462f;font-size:11px;text-transform:uppercase;letter-spacing:normal}.trap p{font-size:13px;line-height:1.7;margin:6px 0 0}.practice{margin-top:26px;padding-top:23px;border-top:1px solid var(--line)}.practice .eyebrow{margin-bottom:10px}.practice a{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:50px;font-size:14px;font-weight:700;color:var(--accent)}.practice small{display:block;font-size:12px;color:var(--muted);line-height:1.6;margin-top:7px}.lesson-next{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:28px;font-size:12px;color:var(--muted)}.lesson-next a{color:var(--accent)}.blueprint{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.5fr;gap:60px;padding:45px 0;scroll-margin-top:24px}.blueprint>div>p:last-child{color:var(--muted);font-size:14px;line-height:1.7;max-width:34ch}.blueprint ol{margin:0;padding-inline-start:24px}.blueprint li{padding-block:0 20px;padding-inline:8px 0;color:var(--accent)}.blueprint li strong{font-size:14px}.blueprint li span{display:block;color:var(--muted);font-size:13px;line-height:1.7;margin-top:6px}.evidence{padding:35px 0 45px;border-top:1px solid var(--line);scroll-margin-top:24px}.evidence h2{font-size:28px}.evidence-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin:25px 0}.evidence-grid strong{font-size:13px}.evidence p{font-size:13px;line-height:1.8;color:var(--muted);margin:9px 0}.evidence details{border-top:1px solid var(--line);padding-top:18px}.evidence summary{cursor:pointer;font-size:13px;padding:8px 0}.evidence details p{max-width:90ch}footer{border-top:1px solid var(--line);padding:24px 0 35px;display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:11px}.noscript{padding:25px;text-align:center}
@media(max-width:800px){.site-header,main,footer{width:calc(100% - 40px)}.learning-layout{grid-template-columns:minmax(0,1fr);gap:22px}.lesson-sidebar{position:static}#lesson-nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}#lesson-nav a{font-size:12px;padding:10px;gap:7px;background:#efede5}.aside-link{display:inline-block;margin-block:16px 0;margin-inline:0 18px}.blueprint{gap:25px}.intro{padding:35px 0}.evidence-grid{gap:18px}}
@media(max-width:480px){.site-header,main,footer{width:calc(100% - 32px)}.site-header{gap:12px;min-height:78px}.brand{font-size:13px;gap:8px}.brand small{font-size:9px}.brand img{width:29px;height:29px}.site-header nav{gap:14px;font-size:12px}h1{font-size:40px}.intro>p:last-child{font-size:14px}#lesson-nav{grid-template-columns:repeat(2,minmax(0,1fr))}#lesson{padding:24px 18px}h2{font-size:29px}.lead{font-size:15px}.math{font-size:.98rem}.blueprint,.evidence-grid{grid-template-columns:1fr;gap:16px}.blueprint{padding:32px 0}.evidence-grid p{margin-bottom:6px}footer{flex-direction:column}.lesson-kicker{font-size:10px}.learning-layout{padding-bottom:36px}}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

/* Hebrew text flows RTL; mathematical notation stays isolated LTR. */
.math,.katex,bdi[dir="ltr"]{direction:ltr;unicode-bidi:isolate}.math{text-align:start}.lesson-kicker,.lesson-next,.site-header{flex-wrap:wrap}.lesson-kicker span{line-height:1.6}.lesson-next a{line-height:1.7}#lesson-nav a{line-height:1.55}#lesson-nav a span{flex-shrink:0}.step h3{display:flex;align-items:baseline;line-height:1.7}.step h3 span{flex-shrink:0}.pattern-evidence{font-size:14px;line-height:1.75}.pattern-evidence summary{cursor:pointer;padding-block:8px}.pattern-evidence p{margin-block:8px 0}.eyebrow,.move strong,.example-label,.trap strong{font-size:12px}.primary,.reset{white-space:normal}.site-header nav{flex-wrap:wrap}.practice a span{flex-shrink:0}
@media(max-width:480px){.site-header{padding-block:14px}.site-header nav{gap:16px}.lesson-kicker{align-items:flex-start}.lesson-next{align-items:flex-start;flex-direction:column}.brand small{font-size:11px}#lesson-nav a{font-size:13px;padding:12px 9px}.step-count{flex-basis:100%;font-size:12px}}