:root{--paper:#f5f4f0;--ink:#202336;--muted:#606575;--accent:#5143c9;--line:#dcdce4;--soft:#eae8f7;--white:#fff;--radius:16px;color-scheme:light}
.box-map{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:20px}.box-map>div{display:flex;align-items:center;gap:10px;padding:14px;background:white;border:1px solid var(--line);border-left:4px solid var(--box-color);border-radius:10px;min-width:0}.box-map span{font-size:13px;color:var(--box-color);font-weight:750}.box-map strong{font-size:18px;line-height:1.25}.focus-content .box-map strong{font-size:23px}.toolbar .portal-link{background:var(--soft);color:var(--accent)}
@media(max-width:400px){.box-map{grid-template-columns:1fr}.toolbar .kit-link{margin-left:0}}
.folder-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:9px;align-items:center;margin-top:22px}.folder-flow>div{display:flex;flex-direction:column;gap:8px;padding:17px 12px;background:var(--soft);border:1px solid #d9d5ef;border-radius:12px;min-width:0}.folder-flow strong{font:650 20px/1.2 ui-monospace,monospace;color:var(--accent)}.folder-flow>div>span:last-child{font-size:12px;line-height:1.35;color:var(--muted)}.folder-icon{display:block;width:27px;height:18px;border:1.5px solid var(--accent);border-radius:3px;position:relative;margin-top:5px}.folder-icon:before{content:'';position:absolute;width:12px;height:5px;top:-5px;left:-1.5px;border:1.5px solid var(--accent);border-bottom:0;border-radius:3px 3px 0 0}.flow-arrow{color:var(--accent);font-size:18px}.focus-content .folder-flow{margin-top:0}.focus-content .folder-flow strong{font-size:26px}.focus-content .folder-flow>div>span:last-child{font-size:16px}
@media(max-width:560px){.folder-flow{grid-template-columns:1fr;gap:7px}.folder-flow>div{display:grid;grid-template-columns:30px 1fr;gap:5px 12px;padding:13px 17px}.folder-flow>div>span:last-child{grid-column:2}.flow-arrow{transform:rotate(90deg);justify-self:center;line-height:1}.folder-icon{grid-row:1/3}}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Avenir Next","Segoe UI",Arial,sans-serif;font-size:clamp(21px,1.75vw,29px);line-height:1.43;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{opacity:.36;cursor:default}a{color:var(--accent);text-underline-offset:4px}button,a{touch-action:manipulation}button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:3px solid #d87318;outline-offset:4px}button:hover:not(:disabled){filter:brightness(.93)}[hidden]{display:none!important}p{margin:0 0 15px}strong{font-weight:750}h1,h2,p{overflow-wrap:break-word}h1:focus{outline:none}.skip{position:fixed;top:-100px;left:15px;z-index:1000;background:white;padding:12px}.skip:focus{top:12px}.topbar{display:grid;grid-template-columns:1fr auto;align-items:center;gap:13px 24px;padding:15px 3.2vw 0;background:var(--white);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-size:17px;font-weight:750;line-height:1.2}.brand small{display:block;font-size:10px;letter-spacing:.14em;color:var(--muted);margin-top:5px}.brand-mark{display:grid;place-items:center;width:40px;height:40px;background:var(--accent);color:white;border-radius:12px;font-size:22px}.toolbar{display:flex;align-items:center;gap:6px}.toolbar button,.kit-link{font-size:12px;font-weight:650;line-height:1.2;border:0;border-radius:7px;padding:9px 10px;background:transparent;color:var(--muted);text-decoration:none;white-space:nowrap}.toolbar button[aria-pressed=true]{background:var(--soft);color:var(--accent)}.kit-link{background:var(--ink);color:white;margin-left:6px;padding:11px 14px}#chapterNav{grid-column:1/-1;display:flex;gap:22px}#chapterNav button{display:flex;gap:7px;align-items:center;border:0;border-bottom:3px solid transparent;background:transparent;color:var(--muted);padding:8px 0 12px;font-size:13px;font-weight:650}#chapterNav button span{font-size:11px;display:grid;place-items:center;border:1px solid var(--line);width:20px;height:20px;border-radius:50%}#chapterNav button[aria-current=step]{color:var(--accent);border-color:var(--accent)}#chapterNav button[aria-current=step] span{background:var(--accent);border-color:var(--accent);color:white}
#deck{max-width:1700px;margin:auto;padding:26px 3.2vw 100px}.slide{min-width:0}.slide-heading{padding-bottom:20px}.eyebrow{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:12px;font-weight:650;margin-bottom:15px}.chapter-label{color:var(--accent);background:var(--soft);border-radius:5px;padding:5px 8px}.time{margin-left:auto;font-weight:500}h1{font-size:clamp(37px,3.7vw,68px);font-weight:780;letter-spacing:-.044em;line-height:1.08;margin:0;max-width:1500px}.subtitle{margin:12px 0 0;font-size:clamp(18px,1.45vw,25px);color:var(--muted);line-height:1.35}.lesson-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:3.4vw;align-items:start;padding:7px 0 22px}.explanation{min-width:0;padding:7px 0}.block-label{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:750;letter-spacing:.08em;text-transform:uppercase;line-height:1.2;margin:0 0 15px;color:var(--muted)}.step{display:none}.focus-trigger{margin-left:auto;display:flex;align-items:center;gap:5px;font-size:11px;font-weight:550;letter-spacing:0;text-transform:none;border:0;padding:5px 0 5px 7px;color:var(--muted);background:transparent}.focus-trigger svg{width:12px;height:12px}.explanation>p{line-height:1.4;margin-bottom:16px}.example{padding:16px 20px;background:#eaeaf2;border:1px solid #dfdfe9;border-radius:var(--radius);margin:20px 0 0}.example-label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:#55556d;font-weight:750;margin-bottom:8px}.example p{font-size:.92em;line-height:1.4;margin:0}.sources{font-size:11px;line-height:1.5;margin-top:13px;color:var(--muted)}.sources span{display:block;font-size:10px;margin-top:3px}.sources a{color:var(--muted)}.practice{background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 4px 0 #e9e8e3;padding:23px 26px;min-width:0}.question{padding:0 0 20px;border-bottom:1px solid var(--line)}.question .block-label{color:var(--accent);margin-bottom:10px}.question p{font-size:clamp(24px,2vw,35px);font-weight:680;letter-spacing:-.022em;line-height:1.24;margin:0}.exercise{padding-top:20px}.exercise>p:not(.deliverable){font-size:1em;line-height:1.4;margin-bottom:18px}.reveal{display:inline-flex;align-items:center;gap:24px;border:0;border-radius:9px;background:var(--accent);color:white;padding:12px 18px;font-size:15px;font-weight:700;min-height:44px}.deliverable{border-top:1px dashed var(--line);margin:19px 0 0;padding-top:13px;font-size:13px;line-height:1.4;font-weight:650;color:#37394d}.deliverable span{display:block;font-size:10px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.08em;margin-bottom:3px}.answer{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);font-size:.94em}.answer-label{display:flex;align-items:center;color:var(--accent);font-size:12px;letter-spacing:.07em;text-transform:uppercase;font-weight:750}.slide-footer{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:12px;color:var(--muted);font-size:10px;line-height:1.3}.slide-footer span:last-child{display:none}.navigation{position:fixed;bottom:0;left:0;right:0;background:white;border-top:1px solid var(--line);padding:11px 3.2vw;display:flex;gap:22px;align-items:center;z-index:10}.progress-track{position:absolute;top:-2px;left:0;width:100%;height:3px;background:#e4e3ed}#progress{height:100%;background:var(--accent);transition:width .15s}.nav-button{background:var(--ink);color:white;border:1px solid var(--ink);border-radius:8px;padding:10px 17px;font-size:14px;font-weight:650;min-height:41px}.nav-button.secondary{background:white;color:var(--ink);border-color:var(--line)}.page-info{display:flex;align-items:center;gap:15px;flex:1;min-width:0}.page-info strong{font-size:17px;white-space:nowrap;font-variant-numeric:tabular-nums}.page-info span{color:var(--muted);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.timer-group{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}.timer-group button{border:0;background:transparent;color:var(--muted);font-size:15px;padding:5px}.md-sample{font:0.85em/1.45 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap;overflow-wrap:anywhere;padding:16px 20px;background:var(--soft);border-radius:10px}code{font:0.88em/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;overflow-wrap:anywhere}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{font-size:12px;padding:5px 8px;background:var(--soft);border-radius:5px}.comparison{width:100%;border-collapse:collapse;font-size:.9em}.comparison td,.comparison th{text-align:left;padding:10px;border-bottom:1px solid var(--line)}
dialog{color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:18px;width:min(900px,92vw);max-height:88dvh;padding:26px}dialog::backdrop{background:#1c1f3a88;backdrop-filter:blur(5px)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:15px}.dialog-heading h2{font-size:27px;letter-spacing:-.03em;margin:0}.dialog-heading button{border:0;background:transparent;font-size:22px}#indexDialog>p{font-size:14px;color:var(--muted);margin:10px 0 20px}#indexLinks{display:grid;grid-template-columns:1fr 1fr;gap:7px}#indexLinks a{display:flex;align-items:center;gap:13px;text-decoration:none;padding:12px;font-size:14px;background:white;border:1px solid var(--line);border-radius:8px;color:var(--ink)}#indexLinks a[aria-current=page]{border-color:var(--accent);color:var(--accent)}#indexLinks a span{font-size:12px;color:var(--muted)}#notice{position:fixed;bottom:80px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;z-index:100;font-size:14px;border-radius:8px;max-width:90vw}#notice:not(:empty){padding:12px 18px}.no-script{padding:24px}
#focusDialog{position:fixed;inset:0;border:0;border-radius:0;margin:0;width:100vw;max-width:none;height:100dvh;max-height:none;padding:0;background:var(--paper);overflow:auto}.focus-shell{padding:25px 5vw 100px}.focus-top{display:flex;align-items:center;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line)}.focus-kicker{font-size:12px;font-weight:700;color:var(--accent);margin-right:auto}.focus-pages{display:flex;gap:6px}.focus-top button,.focus-tabs button,.focus-next{font-size:13px;font-weight:650;padding:10px 13px;background:white;border:1px solid var(--line);border-radius:8px;color:var(--ink)}.focus-title{font-size:clamp(36px,4vw,68px);font-weight:760;letter-spacing:-.04em;line-height:1.1;margin:25px 0 30px}.focus-content{font-size:clamp(26px,2.65vw,46px);line-height:1.38}.focus-content p{margin-bottom:22px}.focus-columns{display:grid;grid-template-columns:1fr 1fr;gap:4vw}.focus-columns .example{margin-top:0}.focus-answer{max-width:1300px}.focus-answer .answer-label{font-size:13px}.focus-question{max-width:1200px;font-size:1.23em;font-weight:650;letter-spacing:-.025em}.focus-sources{font-size:12px;display:flex;gap:18px;flex-wrap:wrap;margin-top:16px}.focus-bottom{position:fixed;bottom:0;left:0;right:0;display:flex;align-items:center;gap:18px;background:white;border-top:1px solid var(--line);padding:12px 5vw;z-index:4}.focus-tabs{display:flex;gap:5px}.focus-tabs button[aria-pressed=true]{background:var(--soft);border-color:var(--accent);color:var(--accent)}.focus-hint{margin-left:auto;font-size:12px;color:var(--muted)}.focus-next{background:var(--accent);border-color:var(--accent);color:white}.prompt-copy{font-size:14px;border:1px solid var(--accent);border-radius:7px;background:white;color:var(--accent);padding:10px}
@media screen and (min-width:900px){body:not(.study){height:100dvh;display:flex;flex-direction:column;overflow:hidden}body:not(.study)>.topbar{flex:0 0 auto}body:not(.study)>#deck{position:relative;flex:1 1 auto;min-height:0;max-width:none;width:100%;margin:0;padding:22px 3.2vw 12px;overflow:hidden}body:not(.study) .slide{position:absolute;transform-origin:top left;margin:0;min-height:0}body:not(.study)>.navigation{position:relative;flex:0 0 auto}#focusDialog{overflow:hidden}#focusDialog .focus-shell{position:absolute;top:0;left:0;width:100%;min-height:0;padding:20px 5vw 16px;transform-origin:top left}}
.study .slide{padding:25px 0 45px;margin-bottom:35px;border-bottom:2px solid var(--line)}
@media screen and (min-width:900px) and (max-height:950px){
 body:not(.study){font-size:clamp(23px,1.85vw,30px)}
 body:not(.study)>.topbar{padding-top:9px;gap:5px 22px}
 body:not(.study) .brand-mark{width:34px;height:34px;font-size:20px}
 body:not(.study) .brand{font-size:15px}
 body:not(.study) #chapterNav button{padding-top:6px;padding-bottom:8px;font-size:12px}
 body:not(.study)>#deck{padding-top:16px;padding-bottom:9px}
 body:not(.study) .slide-heading{padding-bottom:12px}
 body:not(.study) .eyebrow{margin-bottom:10px}
 body:not(.study) h1{font-size:clamp(36px,3.4vw,62px)}
 body:not(.study) .subtitle{margin-top:8px}
 body:not(.study) .lesson-grid{padding-bottom:14px;gap:2.8vw}
 body:not(.study) .block-label{margin-bottom:10px}
 body:not(.study) .explanation>p{margin-bottom:12px;line-height:1.34}
 body:not(.study) .example{padding:12px 16px;margin-top:14px}
 body:not(.study) .example p{line-height:1.32}
 body:not(.study) .practice{padding:18px 21px}
 body:not(.study) .question{padding-bottom:14px}
 body:not(.study) .question p{font-size:clamp(24px,1.95vw,35px)}
 body:not(.study) .exercise{padding-top:14px}
 body:not(.study) .exercise>p:not(.deliverable){line-height:1.34;margin-bottom:14px}
 body:not(.study) .deliverable{padding-top:10px;margin-top:13px;font-size:12px}
 body:not(.study) .deliverable span{display:inline;margin-right:6px;letter-spacing:.035em}
 body:not(.study) .sources{margin-top:10px}
 body:not(.study) .slide-footer{padding-top:9px}
}
@media(max-width:899px){body{font-size:21px}.topbar{padding:13px 5vw 0;gap:13px}.brand{font-size:15px}.brand-mark{width:34px;height:34px}.toolbar{gap:3px;flex-wrap:wrap;justify-content:flex-end}.toolbar button,.kit-link{font-size:11px;padding:8px}#chapterNav{overflow-x:auto;gap:18px;max-width:90vw}#chapterNav button{white-space:nowrap;font-size:12px}#deck{padding:24px 5vw 100px}.lesson-grid{gap:24px;grid-template-columns:1fr}h1{font-size:38px}.eyebrow{flex-wrap:wrap;gap:8px;font-size:10px}.chapter-label{display:none}.practice{padding:22px}.navigation{gap:12px;padding:10px 5vw}.page-info{justify-content:center}.page-info span,.timer-group{display:none}.nav-button{font-size:12px;padding:10px 12px}.slide-footer{font-size:10px}.focus-shell{padding:18px 5vw 110px}.focus-top{flex-wrap:wrap;gap:8px}.focus-kicker{width:100%}.focus-pages{margin-right:auto}.focus-top button{font-size:11px;padding:8px}.focus-content{font-size:25px}.focus-title{font-size:35px}.focus-columns{grid-template-columns:1fr;gap:15px}.focus-hint{display:none}.focus-bottom{gap:7px;padding:10px 3vw}.focus-bottom button{font-size:11px;padding:9px 8px}.focus-next{margin-left:auto}.focus-tabs{gap:3px}}
@media(max-width:560px){.topbar{grid-template-columns:1fr}.toolbar{justify-content:flex-start}.toolbar button{padding:7px 8px}.kit-link{margin-left:auto}.brand small{display:inline;margin-left:12px;font-size:9px}.brand{font-size:15px}#chapterNav{gap:16px}h1{font-size:34px}.subtitle{font-size:18px}.question p{font-size:25px}#indexLinks{grid-template-columns:1fr}.nav-button.secondary span{display:none}.page-info strong{font-size:16px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{body{background:white;color:#111;font-size:13pt}.topbar,.navigation,.skip,.focus-trigger,.reveal,.deliverable,dialog,#notice{display:none!important}#deck{padding:0;margin:0;max-width:none}.slide{display:block!important;break-after:page;position:static!important;transform:none!important;width:auto!important;height:auto!important;padding:0!important;margin:0!important}.slide-heading{padding-bottom:15px}h1{font-size:28pt}.subtitle{font-size:14pt}.lesson-grid{display:block;padding:0}.practice{box-shadow:none;border:0;padding:15px 0}.question p{font-size:18pt}.example{break-inside:avoid;background:#eee}.slide-footer{margin-top:20px}.answer{break-inside:avoid}.sources{font-size:9pt}.study .slide{border:0}.time{display:none}}