:root{--ink:#172c27;--muted:#687a73;--green:#19634b;--lime:#d9eb95;--paper:#f6f8f3;--line:#dfe5dd;--white:#fff;--side:#15392e}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:15px;line-height:1.6}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button,a,input,select{outline-offset:4px}button{cursor:pointer}button:disabled{opacity:.6;cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #92b66a}#sidebar{position:fixed;inset:0 auto 0 0;width:270px;background:var(--side);color:#e8f0e8;padding:31px 21px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:12px;color:white;font-size:13px;font-weight:750;letter-spacing:.7px;margin:0 4px 42px}.brand 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small{font-size:10px;color:var(--muted)}#error{color:#a43838;min-height:20px}.loading{padding:60px;color:var(--muted)}@media(min-width:1450px){.grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:1000px){#sidebar{width:235px;padding:26px 14px}.shell{margin-left:235px}header{padding:20px 27px}main{padding:33px 27px}.hero-art{display:none}h1{font-size:36px}.stat{padding:0 15px}.brand{font-size:11px}.brand small{font-size:7px}}@media(max-width:760px){#sidebar{transform:translateX(-100%);transition:transform .2s;width:270px}body.menu-open #sidebar{transform:translateX(0);box-shadow:10px 0 40px #15392e50}.shell{margin-left:0}#menu{display:block}header{height:72px;padding:15px 20px;gap:14px}.private-badge,kbd{display:none}main{padding:28px 20px}.grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr);gap:20px;padding:20px 0}.stat:nth-child(2){border:0}.stat 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/* Keep global notes search visible while reading long lessons and transcripts. */
header{position:sticky;top:0;z-index:10}
.search-wrap{width:min(720px,100%);min-width:0;gap:10px;padding:4px 6px 4px 14px;border:1px solid #bdcdb7;border-radius:10px;background:var(--paper)}
.search-wrap:focus-within{border-color:var(--green);box-shadow:0 0 0 2px #19634b18}
.search-wrap input{min-width:0;flex:1;width:auto}
.search-wrap button{border:0;border-radius:7px;background:var(--green);color:white;padding:8px 16px;font-size:13px}
.segment{scroll-margin-top:110px}
@media(max-width:760px){header{padding:10px 14px;gap:9px}.search-wrap{gap:6px;padding-left:10px}.search-wrap>span{display:none}.search-wrap input{font-size:16px}.search-wrap button{padding:8px 11px}.segment{scroll-margin-top:90px}}

.study-intro{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:24px 0 12px}.study-body{font-size:16px;line-height:1.85}.study-body>p:first-child{font-size:19px;line-height:1.6;color:var(--ink);margin:0 0 30px}.study-body h2{font-size:21px;margin:32px 0 14px;line-height:1.4}.study-body li{margin:12px 0}.study-footnote{font-size:12px;color:var(--muted);margin:24px 0}.reading-time{font-size:11px;color:var(--muted)}.source-details{margin:15px 0;border:1px solid var(--line);border-radius:10px;background:white}.source-details>summary{padding:17px 20px;cursor:pointer;color:var(--green);font-size:14px;font-weight:600}.source-details>.detail-section{margin:0;border:0;border-top:1px solid var(--line);border-radius:0 0 10px 10px}.source-details summary:hover{background:#edf2e8}.study-body p{margin:15px 0}.study-body ul,.study-body ol{padding-left:25px}.study-body h2{scroll-margin-top:110px}@media(max-width:760px){.study-body{font-size:15px;line-height:1.8}.study-body>p:first-child{font-size:17px}.study-body h2{font-size:20px}.study-intro{gap:10px}.source-details>summary{padding:16px}}