:root{--ink:#15324d;--teal:#087e83;--gold:#ba8a3c;--muted:#506374;--line:#d2dce2;--white:#fff;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--white);font-synthesis:none}*{box-sizing:border-box}body{margin:0;padding:0 28px}button,input,select,textarea{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer;background:white;color:var(--ink);border:1px solid var(--ink);border-radius:4px;padding:10px 20px;line-height:1.2;font-size:16px}button:hover{background:#edf4f5}button:disabled{opacity:.4;cursor:default}button.primary{background:var(--ink);color:white}button.primary:hover{background:#244d6a}a{color:var(--teal);text-underline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:4px}.skip{position:absolute;top:-100px;left:20px;background:white;padding:16px;z-index:10}.skip:focus{top:10px}.site-head{display:flex;justify-content:space-between;align-items:center;padding:16px 12px 20px;border-bottom:1px solid var(--line);gap:24px}.brand{color:var(--ink);text-decoration:none;display:flex;flex-direction:column;font-family:Georgia,'Times New Roman',serif}.brand strong{font-size:48px;line-height:1.05;letter-spacing:-.04em}.brand span{font-size:24px;margin-top:2px}.site-head nav{display:flex;align-items:center;gap:32px;font-family:Georgia,'Times New Roman',serif;font-size:22px}.site-head nav a,.site-head nav button{background:transparent;color:var(--ink);text-decoration:none;border:0;font-family:inherit;font-size:inherit;padding:10px 0}.site-head nav a:hover,.site-head nav button:hover{text-decoration:underline}.lesson-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px;border-bottom:1px solid var(--line);font:22px/1.3 Georgia,'Times New Roman',serif}.page-nav{display:flex;gap:14px;flex-shrink:0}.workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(320px,1fr);gap:28px;margin:18px 12px 16px;align-items:start}.slide{min-width:0;min-height:550px}.slide h1{font:700 clamp(30px,2.8vw,46px)/1.1 Georgia,'Times New Roman',serif;letter-spacing:-.025em;margin:8px 0 14px}.lede{font:clamp(20px,1.8vw,28px)/1.3 Georgia,'Times New Roman',serif;margin:8px 0 18px}.transcript{border-left:1px solid var(--line);padding-left:28px;max-height:590px;overflow-y:auto;scrollbar-width:thin}.transcript h2{font:700 36px/1.1 Georgia,'Times New Roman',serif;margin:8px 0 22px;letter-spacing:-.02em}.transcript p{font-size:19px;line-height:1.48;margin:0 0 18px;color:#172d42}.transcript a{display:inline-block;margin:2px 0 18px}.graph-stage{min-width:0;min-height:280px}.graph-stage svg{width:100%;height:auto;display:block;overflow:visible}.graph-stage svg text{font-family:Georgia,'Times New Roman',serif;fill:var(--ink)}.graph-caption{font-size:14px;line-height:1.45;color:var(--muted);text-align:center;margin:4px 12px 12px}.graph-control{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:9px 0;font-size:15px;border-top:1px solid var(--line)}.graph-control label{font-weight:600}.graph-control input[type=range]{accent-color:var(--teal);width:min(280px,60vw)}.graph-control output{font-variant-numeric:tabular-nums}.graph-control button{font-size:14px;padding:7px 12px}.concept-lines{display:grid;gap:18px;margin:32px 0}.concept-line{font:24px/1.45 Georgia,'Times New Roman',serif;border-left:3px solid var(--teal);padding:8px 20px}.stata{font:12.5px/1.35 'SFMono-Regular',Consolas,'Liberation Mono',monospace;background:#f8fafb;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);padding:18px 12px;overflow:auto;white-space:pre;max-width:100%;color:#112c40;tab-size:4}.slide .stata{max-height:515px}.exercise{border-top:1px solid var(--line);padding:15px 0 8px;line-height:1.5}.exercise h3{font:700 20px/1.3 Georgia,'Times New Roman',serif;margin:8px 0}.exercise p{font-size:17px;margin:8px 0 14px}.exercise details{border-left:3px solid var(--gold);padding:5px 16px}.exercise summary{cursor:pointer;font-size:17px;font-weight:600}.exercise textarea{width:100%;min-height:100px;border:1px solid var(--line);padding:12px;color:var(--ink);resize:vertical;background:white;line-height:1.5}.step-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:28px;padding:14px 12px;flex-wrap:wrap;font-size:17px}.step-bar #position{font:24px Georgia,serif;min-width:65px}.step-bar #present{margin-left:auto;font-size:14px;border-color:var(--line)}.meeting-plan{margin:28px 12px 0}.meeting-plan>div{display:grid;grid-template-columns:28% 1fr;border-top:1px solid var(--line);align-items:center;gap:24px;padding:12px 0}.meeting-plan>div:last-child{border-bottom:1px solid var(--line)}.meeting-plan h2{font:700 22px/1.2 Georgia,serif;margin:0}.meeting-plan p{font-size:16px;line-height:1.4;margin:0;border-left:1px solid var(--line);padding-left:28px}.site-foot{color:var(--muted);font-size:13px;line-height:1.45;margin:36px 12px 24px;display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between}.site-foot p{margin:0}.reading{max-width:920px;margin:48px auto 70px;line-height:1.65;font-size:18px}.reading.wide{max-width:1250px}.reading h1{font:700 44px/1.15 Georgia,serif;letter-spacing:-.03em}.reading h2{font:700 30px/1.2 Georgia,serif;margin-top:40px}.reading h3{font-family:Georgia,serif}.reading section{border-top:1px solid var(--line);margin-top:36px;padding-top:4px}.reading .lede{font-size:24px}.reading table{border-collapse:collapse;width:100%;margin:24px 0;font-size:16px}.reading th,.reading td{padding:14px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}.reading th{border-bottom:2px solid var(--ink);font-weight:600}.reading .teaching-note{font-size:15px;color:var(--muted);border-left:2px solid var(--line);padding-left:16px}.draft-note{color:var(--muted);font-size:16px}.reading select{display:block;padding:10px;max-width:100%;margin:12px 0 24px;color:var(--ink);background:white;border:1px solid var(--line)}.reading .practice-item{padding:20px 0;border-top:1px solid var(--line)}.reading .practice-item h2{margin-top:10px;font-size:26px}.reading .practice-item details{border-left:3px solid var(--gold);padding-left:18px}.reading .practice-item summary{cursor:pointer;font-weight:600}.reading .practice-item textarea{width:100%;border:1px solid var(--line);min-height:88px;margin:6px 0 16px;padding:10px;line-height:1.5;color:var(--ink)}dialog{max-width:1120px;width:calc(100% - 40px);max-height:90vh;border:1px solid var(--line);padding:28px;color:var(--ink)}dialog::backdrop{background:rgba(15,35,55,.25)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.dialog-head h2{font:700 36px Georgia,serif;margin:0}dialog>p{line-height:1.5;color:var(--muted)}.map-row{display:grid;grid-template-columns:50px 1fr auto;gap:14px;border-top:1px solid var(--line);padding:18px 0;align-items:start}.map-row>span{font:26px Georgia,serif}.map-row h3{margin:0 0 8px;font:700 22px Georgia,serif}.map-row p{line-height:1.5;margin:6px 0}.map-row details{font-size:15px;color:var(--muted);margin-top:10px}.map-row summary{cursor:pointer;color:var(--teal)}.map-row ul{padding-left:20px}.map-state{font-size:13px;color:var(--muted)}body.focus .workspace{grid-template-columns:1fr}body.focus .transcript{display:none}body.focus .slide{max-width:1200px;width:100%;margin:auto}body.focus .slide h1{font-size:48px}body.focus .slide .stata{font-size:15px;max-height:680px}body.focus .graph-stage{max-width:1100px;margin:auto}body.focus .site-foot,body.focus .meeting-plan{display:none}body.focus .slide{min-height:70vh}
@media(min-width:1800px){body{max-width:1800px;margin:auto}.slide h1{font-size:48px}.transcript p{font-size:21px}.transcript{max-height:720px}.slide{min-height:650px}}
@media(max-width:1000px){body{padding:0 18px}.site-head nav{gap:18px;font-size:18px}.brand strong{font-size:40px}.brand span{font-size:20px}.workspace{grid-template-columns:minmax(0,1.4fr) minmax(270px,1fr);gap:20px;margin-left:0;margin-right:0}.slide h1{font-size:32px}.transcript{padding-left:20px}.transcript h2{font-size:28px}.transcript p{font-size:17px}.lesson-bar{font-size:18px}.step-bar{gap:18px}.meeting-plan h2{font-size:19px}.meeting-plan>div{grid-template-columns:30% 1fr}.stata{font-size:11px}}
@media(max-width:720px){body{padding:0 16px}.site-head{align-items:start;flex-direction:column;gap:14px;padding:20px 0 12px}.brand strong{font-size:38px}.brand span{font-size:20px}.site-head nav{width:100%;justify-content:space-between;font-size:18px;gap:14px}.lesson-bar{align-items:start;padding:14px 0;flex-direction:column;gap:12px}.page-nav{width:100%;justify-content:space-between}.workspace{grid-template-columns:1fr;margin-top:16px}.slide{min-height:0}.slide h1,body.focus .slide h1{font-size:34px}.lede{font-size:23px}.transcript{border:0;border-top:1px solid var(--line);padding:24px 0 0;max-height:none}.transcript h2{font-size:30px}.transcript p{font-size:18px}.step-bar{padding:16px 0;gap:18px;font-size:16px}.step-bar #present{margin-left:0}.meeting-plan{margin:26px 0 0}.meeting-plan>div{grid-template-columns:1fr;gap:8px}.meeting-plan p{border-left:0;padding-left:0}.meeting-plan h2{font-size:22px}.site-foot{margin-left:0;margin-right:0}.graph-stage{min-height:0}.concept-line{font-size:22px;padding-left:14px}.reading{margin-top:30px;font-size:17px}.reading h1{font-size:34px}.reading h2{font-size:28px}.reading table{font-size:13px}.reading th,.reading td{padding:10px 5px;overflow-wrap:anywhere}.map-row{grid-template-columns:35px minmax(0,1fr);gap:10px}.map-row>a,.map-row>.map-state{grid-column:2}.map-row h3{font-size:20px}dialog{padding:18px}.stata{font-size:10.5px}.graph-control{gap:10px}.graph-control output{font-size:14px}.reading .exercise textarea{font-size:16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0s!important;transition:none!important;scroll-behavior:auto!important}}
@media print{body{padding:0;color:black}.site-head nav,.site-foot,.skip,.reading>p:first-child,button,textarea,dialog,.step-bar{display:none!important}.site-head{padding:0 0 12px}.brand strong{font-size:26px}.brand span{font-size:16px}.reading{margin:12px 0;max-width:none;font-size:11pt}.reading h1{font-size:24pt}.reading h2{font-size:17pt;break-after:avoid}.reading .lede{font-size:14pt}.reading section{break-inside:auto;margin-top:22px}.stata{font-size:7pt;white-space:pre-wrap;background:white;max-height:none!important}.reading table{font-size:10pt}.exercise{break-inside:avoid}.teaching-note{font-size:9pt!important}.workspace{display:block}.transcript{max-height:none;overflow:visible;border:0;padding:0}.slide{break-after:page}}

.graph-stage.zoomed{overflow-x:auto;max-width:100%}.graph-stage.zoomed svg{min-width:1000px}.graph-stage.zoomed::after{content:"Scroll sideways to inspect the enlarged graph.";display:block;font:14px/1.5 Arial,sans-serif;color:var(--muted);padding:8px 0}

@media(min-width:721px) and (max-width:1799px){.graph-stage:not(.zoomed) svg{max-height:370px}}
.eyebrow{font:15px/1.4 Arial,sans-serif;color:var(--muted)}.map-links{font-size:15px}.download-link{font-weight:700}.katex{font-size:1.06em}.concept-line .katex-display{margin:.3em 0;text-align:left}.concept-line{overflow-wrap:break-word}.katex-display{overflow-x:auto;overflow-y:hidden;padding:4px 0}.site-head nav{gap:24px}.site-head nav a,.site-head nav button{font-size:20px}.print-deck{margin:0 auto}.pdf-slide{position:relative;width:1280px;height:720px;padding:40px 55px 52px;overflow:hidden;break-after:page;background:white}.pdf-kicker{font:15px/1.3 Arial,sans-serif;color:var(--teal);letter-spacing:.035em;padding-bottom:12px;border-bottom:1px solid var(--line)}.pdf-slide h1{font:700 38px/1.15 Georgia,serif;margin:18px 0 10px;letter-spacing:-.02em}.pdf-slide .lede{font:24px/1.3 Georgia,serif;margin:6px 0 12px}.pdf-content{max-height:490px;overflow:visible}.pdf-slide .graph-stage{height:340px;min-height:0}.pdf-slide .graph-stage svg{max-height:340px;width:100%;height:340px}.pdf-slide .graph-caption{font-size:12px;margin:0 12px 4px}.pdf-slide .concept-lines{gap:12px;margin:18px 0}.pdf-slide .concept-line{font:25px/1.4 Georgia,serif;padding:7px 18px}.pdf-slide:has(.graph-stage) .concept-lines{margin:6px 0;gap:4px}.pdf-slide:has(.graph-stage) .concept-line{font-size:19px;padding:2px 15px}.pdf-slide .stata{font:15px/1.22 'SFMono-Regular',Consolas,monospace;padding:12px;max-height:none;margin:8px 0}.pdf-slide .has-output:has(.concept-line) .stata{font-size:13px}.pdf-slide .has-output .concept-lines{margin:8px 0;gap:4px}.pdf-slide .has-output .concept-line{font-size:21px;padding:3px 14px}.pdf-slide .exercise{margin:15px 0;border-top:2px solid var(--teal);padding:14px 0}.pdf-slide .exercise p{font-size:25px;line-height:1.5}.pdf-slide .exercise .worked{font-size:21px}.pdf-footer{position:absolute;bottom:24px;left:55px;right:55px;border-top:1px solid var(--line);padding-top:10px;display:flex;justify-content:space-between;font:13px/1.3 Arial,sans-serif;color:var(--muted)}body:has(.print-deck){padding:0}.print-deck~.site-foot{display:none}
@media print{@page{size:1280px 720px;margin:0}body:has(.print-deck)>.site-head{display:none}body:has(.print-deck){padding:0;max-width:none}.pdf-slide .stata{white-space:pre}.pdf-slide .graph-stage svg{max-height:340px}.pdf-slide .concept-line{break-inside:avoid}}
@media(max-width:720px){.site-head nav{gap:12px;flex-wrap:wrap}.site-head nav a,.site-head nav button{font-size:17px}.concept-lines{margin:22px 0}}
.pdf-content{max-height:none}.pdf-slide.compact .graph-stage,.pdf-slide.compact .graph-stage svg{height:250px;max-height:250px}.pdf-slide.compact .exercise{margin:9px 0;padding-top:8px}.pdf-slide.compact .exercise p{font-size:22px;line-height:1.4}.pdf-slide.compact .exercise .worked{font-size:18px}.pdf-slide.compact .stata{font-size:13px;line-height:1.17}.pdf-slide.compact .concept-line{font-size:23px}.pdf-slide.compact:has(.graph-stage) .concept-line{font-size:18px}.pdf-slide.compact .has-output .concept-line{font-size:20px}
/* Shared player interactions used across the AUS courses. */
body:has(.lesson-player){padding-bottom:165px}.lesson-bar>a{font:16px Arial,sans-serif;white-space:nowrap}.slide-viewport{min-width:0;max-height:calc(100dvh - 325px);overflow:auto;overscroll-behavior:contain;padding:0 5px 15px 0}.slide-viewport:focus-visible{outline:2px solid var(--gold);outline-offset:3px}.slide-viewport.slide-zoomed{cursor:grab;touch-action:none;height:calc(100dvh - 325px)}.slide-zoomed .slide{transform:none;min-height:550px}.slide-viewport.panning{cursor:grabbing;user-select:none}.script-heading{display:flex;align-items:center;justify-content:space-between;gap:14px}.script-heading h2{margin-bottom:10px}.script-heading button{font-size:13px;padding:7px 10px;border-color:var(--line)}.transcript{max-height:calc(100dvh - 325px);overflow:hidden;display:flex;flex-direction:column}.transcript #script{overflow:auto;min-height:0;padding-right:6px;scrollbar-width:thin}.transcript #script-slide-title{font-size:15px;color:var(--muted);margin:0 0 10px}.check{display:flex;align-items:center;gap:8px;font-size:14px;line-height:1.4}.transcript>.check{padding-bottom:14px}.script-paragraph{display:block;width:100%;text-align:left;padding:12px 14px;margin:0 0 10px;border:1px solid transparent;border-left:3px solid transparent;border-radius:0;font:18px/1.55 Arial,sans-serif;background:white;color:#172d42}.script-paragraph:hover{background:#f7f9fa}.script-paragraph.active{border-left-color:var(--gold);background:#fffaf0}.transcript #script-link{flex-shrink:0;font-size:14px;margin:10px 0 0}.point-current{outline:2px solid #d8b46b;outline-offset:5px;background-color:#fffaf0}.graph-stage.point-current{outline-offset:-1px;background:transparent}.stata.point-current{outline:2px solid var(--gold)}.lesson-player{position:fixed;bottom:0;left:28px;right:28px;z-index:25;background:rgba(255,255,255,.98);border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(21,50,77,.04);padding:10px 12px max(10px,env(safe-area-inset-bottom));color:var(--ink)}.lesson-player>.seek-label{font-size:12px;color:var(--muted);position:absolute;top:8px;left:12px}.lesson-player>#slide-seek{display:block;width:calc(100% - 50px);margin:0 0 10px 50px;accent-color:var(--teal);height:20px}.player-controls{display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap}.navigation,.settings{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.lesson-player button{font-size:14px;padding:10px 13px;min-height:39px}.settings>label{font-size:13px}.settings select{font-size:14px;padding:7px 5px;border:1px solid var(--line);background:white;color:var(--ink);min-height:39px}.player-status{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:9px;font-size:13px;color:var(--muted)}#position{font-variant-numeric:tabular-nums;color:var(--ink)}#options>summary{font-size:14px;cursor:pointer;padding:10px 7px}#options .options-panel{position:absolute;right:12px;bottom:calc(100% + 5px);width:370px;max-width:calc(100vw - 40px);max-height:min(650px,75dvh);overflow:auto;padding:20px;background:white;border:1px solid var(--line);box-shadow:0 12px 40px #15324d22;display:grid;gap:12px}#options .options-panel select{max-width:100%;width:100%;font-size:14px;min-height:40px}#options .options-panel>label{font-weight:600;font-size:14px}#options .options-panel a{font-size:15px}#options .shortcuts{font-size:12px;line-height:1.6;margin:0;color:var(--muted)}#transcript-dialog{max-width:850px}#transcript-dialog p{font:20px/1.65 Arial,sans-serif}body.focus .workspace{grid-template-columns:minmax(0,1fr)}body.focus .slide-viewport{max-width:1200px;margin:auto;width:100%}body.focus .slide{min-height:500px}body.focus .slide-viewport{max-height:calc(100dvh - 300px)}
@media(max-width:1100px){body:has(.lesson-player){padding-bottom:185px}.lesson-player{left:18px;right:18px}.player-controls{gap:10px}.settings{gap:7px}.lesson-player button{padding:9px 11px}.slide-viewport,.transcript{max-height:calc(100dvh - 340px)}}
@media(max-width:720px){body:has(.lesson-player){padding-bottom:230px}.lesson-player{left:0;right:0;padding:8px 12px max(8px,env(safe-area-inset-bottom))}.player-controls{gap:8px}.navigation{width:100%;display:grid;grid-template-columns:1fr 1.3fr 1fr 1fr 1.1fr;gap:5px}.lesson-player .navigation button{padding:10px 4px;font-size:12px;min-height:42px}.settings{gap:7px;justify-content:space-between;width:100%}.settings>label{font-size:11px}.settings select{font-size:12px;max-width:66px;min-height:40px}.settings>button{font-size:12px;padding:9px 6px}.settings>#toggle-script{max-width:70px}.settings>#fullscreen{max-width:60px}#options>summary{font-size:12px;padding:11px 4px}.player-status{font-size:11px;margin-top:5px}.slide-viewport{max-height:none;overflow:visible}.slide-viewport.slide-zoomed{overflow:auto;max-height:65dvh;height:65dvh}.transcript{max-height:600px;overflow:hidden}.transcript #script{max-height:460px}.script-paragraph{font-size:18px}.script-heading h2{font-size:30px}#options .options-panel{right:12px;bottom:calc(100% + 6px)}body.focus .slide-viewport{max-height:none}.lesson-bar>a{font-size:15px}}
@media print{.lesson-player,.script-heading button,.transcript>.check,#script-slide-title,#script-link{display:none!important}body:has(.lesson-player){padding-bottom:0}.slide-viewport{max-height:none;overflow:visible}.transcript{max-height:none;overflow:visible}.transcript #script{overflow:visible}.script-paragraph{border:0;background:none!important;padding:0}.point-current{outline:0;background:transparent}}
.practice-filters{display:grid;grid-template-columns:minmax(0,3fr) minmax(150px,1fr);gap:22px}.practice-filters select{width:100%;margin-bottom:10px}.practice-filters label{font-size:15px;font-weight:600}.practice-status{display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--line);margin:10px 0 18px}.practice-status button{font-size:13px;padding:8px 12px;border-color:var(--line)}.question-nav{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:20px 0}.question-nav button{min-width:110px}.question-nav span{font-size:16px;color:var(--muted)}#practice-navigation>label{font-size:14px;color:var(--muted)}#question-picker{width:100%;margin-bottom:10px}.reading .review-check{display:flex;align-items:center;gap:10px;margin:25px 0 0;font-size:15px}.review-check input{width:18px;height:18px;accent-color:var(--teal)}.reading .practice-item textarea{font-size:17px;min-height:140px}.reading .practice-item details{margin-top:12px}.reading .practice-item details p{line-height:1.7}#practice-list .practice-item:first-child{margin-top:15px}@media(max-width:720px){.practice-filters{grid-template-columns:1fr;gap:0}.practice-status{gap:12px}.practice-status p{font-size:15px}.question-nav button{min-width:85px}.question-nav span{font-size:14px}}
.lesson-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap;font:14px/1.4 Arial,sans-serif;justify-content:flex-end}.lesson-links a{white-space:nowrap}@media(max-width:720px){.lesson-links{justify-content:flex-start;gap:14px;font-size:14px}}
.dag-check{display:flex;align-items:center;gap:7px;font-size:14px;line-height:1.4}.dag-check input{accent-color:var(--gold);height:18px;width:18px}.path-analysis{margin:10px 0 4px;padding:10px 0;border-top:1px solid var(--line);font-size:14px;line-height:1.6}.path-analysis summary{cursor:pointer;color:var(--teal)}.path-analysis ul{padding-left:20px;margin-bottom:8px}.path-status{font-weight:700;margin-right:5px}.path-status.closed{color:var(--muted)}.path-status.open{color:var(--teal)}.path-analysis .katex{font-size:1.05em}.dag-controls{display:flex;gap:12px 20px;flex-wrap:wrap}.practice-dag{margin:22px 0 26px;max-width:900px}.practice-dag svg{width:100%;height:auto;display:block}.practice-dag .graph-caption{font-size:13px}.graph-stage svg path{transition:stroke .3s ease,opacity .3s ease}.pdf-slide .graph-stage svg path{transition:none}
.audio-progress{display:flex;align-items:center;gap:12px;margin-top:8px;font:12px Arial,sans-serif;color:var(--muted)}.audio-progress label{width:38px}.audio-progress input{flex:1;min-width:80px;accent-color:var(--teal)}.audio-progress output{min-width:95px;text-align:right;font-variant-numeric:tabular-nums}.voice-note{font:13px/1.5 Arial,sans-serif;color:var(--muted);margin:0}.stata-row{display:block;min-height:1em}.stata-row.spoken-row{background:#fff0cc;color:#15324d;outline:1px solid #d8b46b}body:has(.lesson-player){padding-bottom:195px}.slide-viewport,.transcript{max-height:calc(100dvh - 355px)}@media(max-width:1100px){body:has(.lesson-player){padding-bottom:215px}}@media(max-width:720px){body:has(.lesson-player){padding-bottom:255px}.slide-viewport{max-height:none}.audio-progress{gap:7px}.audio-progress output{min-width:85px}}@media print{.audio-progress{display:none!important}}
.audio-progress[hidden]{display:none}
/* Lecture selection follows the other AUS course indexes. */
.lecture-index{max-width:1180px;margin:54px auto 80px}.lecture-intro{max-width:850px;margin-bottom:48px}.lecture-eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;color:var(--muted);margin:0 0 16px}.lecture-intro h1{font:700 clamp(38px,4vw,56px)/1.12 Georgia,serif;letter-spacing:-.03em;margin:0 0 18px}.lecture-intro>p:not(.lecture-eyebrow):not(.lede){font-size:17px;line-height:1.65;color:var(--muted);max-width:740px}.lecture-collections{display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:26px;font-size:15px}.lecture-list>h2{font:700 30px/1.2 Georgia,serif;margin:0 0 18px}.lecture-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:20px;border-top:1px solid var(--line);padding:22px 0}.lecture-row:last-child{border-bottom:1px solid var(--line)}.lecture-choice{display:grid;grid-template-columns:52px minmax(0,1fr) 28px;align-items:center;gap:20px;color:var(--ink);text-decoration:none;padding:8px 0}.lecture-choice:hover h3{text-decoration:underline;text-decoration-color:var(--teal);text-underline-offset:5px}.lecture-number{font:28px/1 Georgia,serif;color:var(--teal);font-variant-numeric:tabular-nums}.lecture-choice h3{font:700 23px/1.3 Georgia,serif;letter-spacing:-.015em;margin:0 0 7px}.lecture-meta{font-size:13px;line-height:1.5;color:var(--muted)}.lecture-arrow{font-size:25px;color:var(--teal)}.lecture-actions{display:flex;flex-wrap:wrap;gap:12px 18px;font-size:14px;line-height:1.5}.lecture-actions a{white-space:nowrap}
@media(max-width:900px){.lecture-row{grid-template-columns:minmax(0,1fr);gap:8px}.lecture-actions{padding-left:72px}.lecture-intro{margin-bottom:38px}}
@media(max-width:540px){.lecture-index{margin:34px auto 56px}.lecture-intro h1{font-size:38px}.lecture-row{padding:18px 0}.lecture-choice{grid-template-columns:36px minmax(0,1fr) 18px;gap:13px}.lecture-choice h3{font-size:21px}.lecture-number{font-size:25px}.lecture-actions{padding-left:49px;gap:12px 20px}.lecture-collections{gap:13px 22px}.lecture-arrow{font-size:22px}}

.lecture-intro .lecture-summary{font:16px/1.5 Arial,sans-serif;color:var(--muted);margin:12px 0}.lecture-index{margin-top:40px}.lecture-intro{margin-bottom:32px}.lecture-collections{margin-top:20px}@media(max-width:540px){.lecture-index{margin-top:28px}.lecture-intro{margin-bottom:28px}}

/* Core and appendix share the same player and downloads. */
.lesson-route {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-top: 6px;
  font-size: 14px;
}
#route-label {
  color: var(--muted);
  font-weight: 600;
}
.lesson-route button {
  padding: 2px 0;
  border: 0;
  background: transparent;
  text-decoration: underline;
  text-underline-offset: 3px;
  color: var(--teal);
}
#class-blocks {
  padding-left: 1.6rem;
}
#class-blocks li {
  margin: .65rem 0;
}
#class-blocks button {
  width: 100%;
  text-align: left;
  line-height: 1.45;
}
#class-blocks strong {
  display: block;
}
.lecture-objective {
  display: block;
  font: 15px/1.4 Arial, sans-serif;
  color: var(--muted);
  margin: 4px 0;
}