/* parachutesBTC shared interface: Command center shell */
[hidden]{display:none!important}
:root,[data-theme="dark"]{
  --bg:#14101A;--panel:#221B2C;--rail:#100C16;--text:#F5EDE6;--muted:#B9AFB8;--line:rgba(245,237,230,.14);
  --acc:#F28C1E;--accText:#14101A;--hover:rgba(245,237,230,.07);--sel:rgba(242,140,30,.14);--code:#1B1523;--shadow:0 30px 80px rgba(0,0,0,.5);
}
[data-theme="light"]{
  --bg:#F5EDE6;--panel:#FBF7F3;--rail:#EBE0D6;--text:#2A2230;--muted:#5B5160;--line:rgba(42,34,48,.16);
  --acc:#9E4C63;--accText:#FFFFFF;--hover:rgba(42,34,48,.06);--sel:rgba(158,76,99,.12);--code:#EFE6DD;--shadow:0 30px 80px rgba(42,34,48,.25);
}
*{box-sizing:border-box}
html{color-scheme:dark;scroll-padding-top:76px}   /* sticky header (60px) + breathing room: anchor targets and scrollIntoView land below it */
@media (max-width:820px){html{scroll-padding-top:68px}}
html[data-theme="light"]{color-scheme:light}
body{margin:0;background:var(--bg);color:var(--text);font-family:'Instrument Sans',system-ui,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--text)}
img{max-width:100%}
.mono{font-family:'DM Mono',ui-monospace,monospace}
.lbl{font-size:11px;font-weight:600;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}
.lbl.acc,.acc{color:var(--acc)}
.muted{color:var(--muted)}
.sr{position:absolute;left:-9999px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--acc);color:var(--accText);padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.mt{margin-top:28px}

/* layout */
.shell{display:flex;min-height:100vh}
.rail{width:252px;flex:none;background:var(--rail);border-right:1px solid var(--line);padding:18px 12px;display:flex;flex-direction:column;gap:6px;position:sticky;top:0;height:100vh;overflow:hidden auto;transition:width .25s ease}
[data-rail="collapsed"] .rail{width:72px}
.col{flex:1;min-width:0;display:flex;flex-direction:column;min-height:100vh}
.brand{display:flex;align-items:center;height:46px;padding:0 4px 14px;text-decoration:none}
.logo{height:40px;width:auto;display:block}
.logo-light{display:none}
[data-theme="light"] .logo-dark{display:none}
[data-theme="light"] .logo-light{display:block}
.logo-mono{display:none;height:40px;width:40px}
[data-rail="collapsed"] .logo{display:none!important}
[data-rail="collapsed"] .logo-mono{display:block}
.rail-lbl{padding:6px 12px}
[data-rail="collapsed"] .rail-lbl,[data-rail="collapsed"] .subnav,[data-rail="collapsed"] .nav-t{display:none}
.nav{display:flex;flex-direction:column;gap:4px}
.nav-i{display:flex;align-items:center;gap:12px;height:42px;padding:0 12px;border-radius:10px;font-size:15px;font-weight:600;text-decoration:none;color:var(--text);transition:background .15s}
.nav-i:hover{background:var(--hover)}
.nav-i.on{background:var(--sel);color:var(--acc)}
.nav-i svg{flex:none}
.subnav{margin:2px 0 6px 31px;padding-left:12px;border-left:1px solid var(--line);display:flex;flex-direction:column;gap:2px;font-size:14px}
.subnav a{padding:6px 8px;border-radius:8px;text-decoration:none;color:var(--muted)}
.subnav a:hover,.subnav a.on{color:var(--acc);background:var(--hover)}
.rail-foot{margin-top:auto;padding-top:12px}
.btn{height:38px;min-width:38px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--text);cursor:pointer;font:600 14px 'Instrument Sans',sans-serif;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;transition:border-color .15s}
.btn:hover{border-color:var(--acc)}
.btn.primary{background:var(--acc);color:var(--accText);border-color:var(--acc)}
.btn.ghost{width:100%;height:32px;font-size:12px}
.btn.wide{width:100%;margin-top:12px}
.top{height:60px;flex:none;border-bottom:1px solid var(--line);padding:0 36px;display:flex;align-items:center;gap:12px;position:sticky;top:0;background:var(--bg);z-index:20}
.spacer{flex:1}
.searchbtn{display:flex;align-items:center;gap:10px;height:38px;width:100%;max-width:480px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted);cursor:pointer;font:500 14px 'Instrument Sans',sans-serif}
.searchbtn:hover{border-color:var(--acc)}
.searchbtn .grow{flex:1;text-align:left}
kbd{font:500 11px 'DM Mono',monospace;color:var(--muted)}
main{flex:1;padding:32px 36px 48px}
.page{max-width:1120px}
.page.narrow{max-width:760px}
.foot{flex:none;padding:18px 36px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.flinks{display:flex;gap:22px}
.flinks a{color:var(--muted);text-decoration:none}
.flinks a:hover{color:var(--acc)}

/* type */
.crumbs{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--acc)}
.crumbs .cur{color:var(--text)}
.title{margin:8px 0 0;font-family:'Fraunces',serif;font-weight:600;font-size:46px;line-height:1.06;letter-spacing:-.01em}
.lede{margin:14px 0 0;font-size:19px;line-height:1.55;color:var(--muted);max-width:720px}
.meta{margin-top:14px;font-size:12px;color:var(--muted)}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.tag{font-size:11px;padding:3px 9px;border:1px solid var(--line);border-radius:999px;color:var(--muted)}

/* cards and listing */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0 20px}
.chip{height:34px;padding:0 14px;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--text);cursor:pointer;font:500 14px 'Instrument Sans',sans-serif}
.chip .mono{font-size:12px;color:var(--muted);margin-left:4px}
.chip:hover{border-color:var(--acc)}
.chip.on{background:var(--acc);color:var(--accText);border-color:var(--acc)}
.chip.on .mono{color:var(--accText)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--text);transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:var(--acc)}
.card[hidden]{display:none}
.card-b{padding:18px 20px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.card-k{font-size:11px;letter-spacing:.14em;color:var(--acc)}
.card h3{margin:0;font-family:'Fraunces',serif;font-weight:600;font-size:22px;line-height:1.2}
.card p{margin:0;font-size:15px;line-height:1.5;color:var(--muted)}
.card-m{margin-top:auto;padding-top:8px;font-size:12px;color:var(--muted)}
.thumb{aspect-ratio:16/9;background:var(--code);overflow:hidden}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb.ph{display:flex;align-items:center;justify-content:center;color:var(--acc)}
.empty{padding:48px;border:1px dashed var(--line);border-radius:14px;color:var(--muted);text-align:center}

/* entry */
.entry{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;margin-top:32px;align-items:start}
.entry.solo{grid-template-columns:minmax(0,1fr)}
.entry-m{min-width:0;max-width:760px}
.entry-a{position:sticky;top:84px;display:flex;flex-direction:column;gap:18px}
.toc nav{margin-top:12px;display:flex;flex-direction:column;border-left:1px solid var(--line)}
.toc a{padding:6px 0 6px 14px;margin-left:-1px;border-left:2px solid transparent;color:var(--muted);text-decoration:none;font-size:14px}
.toc a:hover{color:var(--text)}
.toc a.on{color:var(--text);border-left-color:var(--acc)}
.box{padding:18px;background:var(--panel);border:1px solid var(--line);border-radius:12px}
.box p{margin:8px 0 0;font-size:14px}
.boxh{display:flex;justify-content:space-between;align-items:center}
.tabs{display:flex;gap:2px}
.tab{border:0;background:transparent;font:500 12px 'DM Mono',monospace;color:var(--muted);padding:5px 9px;cursor:pointer;border-radius:6px}
.tab.on{background:var(--acc);color:var(--accText)}
.cite{margin:12px 0 0;padding:12px;background:var(--code);border:1px solid var(--line);border-radius:8px;font-size:12px;line-height:1.6;white-space:pre-wrap;word-break:break-word;color:var(--text)}
.prose{font-size:17px;line-height:1.75;color:var(--text)}
.prose h2{font-family:'Fraunces',serif;font-weight:600;font-size:30px;line-height:1.2;margin:2em 0 .5em;scroll-margin-top:8px}
.prose h3{font-family:'Fraunces',serif;font-weight:600;font-size:22px;margin:1.6em 0 .4em;scroll-margin-top:8px}
.prose p{margin:1em 0}
.prose a{color:var(--acc)}
.prose ul,.prose ol{padding-left:1.4em}
.prose li{margin:.35em 0}
.prose blockquote{margin:1.4em 0;padding:.2em 0 .2em 1.2em;border-left:3px solid var(--acc);color:var(--muted);font-style:italic}
.prose code{font:400 .9em 'DM Mono',monospace;background:var(--code);padding:2px 6px;border-radius:5px}
.prose pre{background:var(--code);border:1px solid var(--line);border-radius:10px;padding:16px;overflow:auto}
.prose pre code{background:none;padding:0}
.prose table{border-collapse:collapse;width:100%;font-size:15px;margin:1.4em 0}
.prose th,.prose td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--line)}
.prose th{font:600 11px 'Instrument Sans';letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.fig{margin:1.6em 0;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px}
.fig img{display:block;width:100%;height:auto;border-radius:6px}
.fig figcaption{margin-top:10px;font-size:12px;color:var(--muted)}
.callout{margin:1.4em 0;padding:14px 18px;background:var(--sel);border-left:3px solid var(--acc);border-radius:8px;font-size:16px}
.fine{font-size:13px;color:var(--muted)}
.sources{margin-top:3em;padding-top:1.2em;border-top:1px solid var(--line)}
.sources ol{padding-left:1.4em;font-size:14px;line-height:1.8}
.sources a{color:var(--acc)}
.srccard{padding:20px;background:var(--panel);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.srct{font-family:'Fraunces',serif;font-size:24px;font-weight:600;line-height:1.2}
.takeaways{margin:28px 0 0}
.takeaways ul{margin:10px 0 0;padding-left:1.2em;font-size:17px;line-height:1.7}
.facts{display:flex;gap:18px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:12px}
.embed{margin:24px 0;aspect-ratio:16/9;background:var(--code);border:1px solid var(--line);border-radius:12px;overflow:hidden;position:relative}
.embed iframe,.embed .yt{position:absolute;inset:0;width:100%;height:100%;border:0}
.yt{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}
.yt-play{width:76px;height:76px;border-radius:50%;border:2px solid var(--acc);background:var(--sel);color:var(--acc);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s}
.yt-play:hover{transform:scale(1.08)}
.yt-note{font:400 12px 'DM Mono',monospace;color:var(--muted)}
.media-el{width:100%;margin:24px 0;border-radius:12px;background:var(--code)}
.linkcard{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:16px 20px;margin:20px 0;background:var(--panel);border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--text);font-weight:600}
.linkcard:hover{border-color:var(--acc)}
.bigimg{margin:24px 0;text-align:center}
.bigimg img{max-height:70vh;border-radius:12px;border:1px solid var(--line)}
.actions{display:flex;gap:10px;margin:10px 0 24px}
.lessons{margin-top:12px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}
.lesson{display:flex;gap:16px;align-items:center;padding:14px 20px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--text)}
.lesson:last-child{border-bottom:0}
a.lesson:hover{background:var(--hover)}
.lesson .ln{font:500 13px 'DM Mono',monospace;color:var(--acc);width:24px}
.lesson .lt{flex:1;font-size:16px}
.playlist{display:flex;flex-direction:column;gap:28px;margin-top:20px}
.pl-item{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:24px;align-items:start}
.pl-item .embed{margin:0}
.pl-t h3{margin:0;font-family:'Fraunces',serif;font-size:22px}
.pl-t p{color:var(--muted);font-size:15px}
.pl-t a{color:var(--acc);font-size:13px}
.appbar{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding:8px 2px}
.appbar a{color:var(--acc)}
.app{width:100%;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.related{margin-top:56px}
.related .grid{margin-top:12px}
.az{display:flex;flex-wrap:wrap;gap:6px;margin:24px 0}
.az a{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;text-decoration:none;font-size:13px}
.az a:hover{border-color:var(--acc);color:var(--acc)}
.gloss{max-width:760px}
.letter{margin:2em 0 .4em;font-size:13px;color:var(--acc);scroll-margin-top:8px}
.term{padding:14px 0;border-bottom:1px solid var(--line);scroll-margin-top:8px}
.term:target{background:var(--sel);padding-left:12px;border-radius:8px}
.term dt{font-family:'Fraunces',serif;font-weight:600;font-size:22px}
.term dd{margin:6px 0 0;color:var(--muted)}
.term dd p{margin:.4em 0}

/* palette */
.pal-wrap{position:fixed;inset:0;background:rgba(10,7,14,.6);z-index:200;display:flex;justify-content:center;align-items:flex-start;padding-top:12vh}
.pal-wrap[hidden]{display:none}
.pal{width:min(620px,92vw);background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.pal-in{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.pal-in input{flex:1;background:transparent;border:0;outline:0;color:var(--text);font:400 17px 'Instrument Sans',sans-serif}
.pal-list{max-height:min(420px,60vh);overflow:auto;padding:6px 0}
.pal-i{display:flex;gap:12px;align-items:center;width:100%;padding:10px 16px;border:0;background:transparent;color:var(--text);cursor:pointer;text-align:left;font:400 15px 'Instrument Sans',sans-serif;text-decoration:none}
.pal-i:hover,.pal-i.on{background:var(--hover)}
.pal-i .k{width:120px;flex:none;font:500 11px 'DM Mono',monospace;letter-spacing:.08em;color:var(--acc);text-transform:uppercase}
.pal-none{padding:16px;color:var(--muted)}

/* responsive basics (full mobile pass comes later) */
@media (max-width:1100px){.entry{grid-template-columns:minmax(0,1fr)}.entry-a{position:static}}
@media (max-width:820px){.rail{display:none}.shell{flex-direction:column}main{padding:22px 16px 28px}.title{font-size:34px}.pl-item{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* support / donate */
.don-modal{padding:0}
.don-head{display:flex;justify-content:space-between;align-items:center;padding:14px 16px 0 20px}
.donate{padding:16px 20px 22px;text-align:center}
.don-msg{margin:0 0 14px;color:var(--muted);font-size:15px}
.don-tabs{display:flex;gap:8px;justify-content:center;margin-bottom:16px}
.don-panel[hidden]{display:none}
.qr{width:220px;height:220px;display:block;margin:0 auto;border-radius:12px;border:6px solid #fff;background:#fff}
.don-label{margin-top:16px}
.don-addr{margin-top:8px;font-size:14px;word-break:break-all;line-height:1.6;padding:10px 12px;background:var(--code);border:1px solid var(--line);border-radius:8px;user-select:all}
.don-btns{display:flex;gap:10px;justify-content:center;margin-top:12px;flex-wrap:wrap}
#don-inline .donate{max-width:460px;margin:24px 0;padding:0;text-align:center}

.hero-fig{margin:0 0 22px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--panel)}
.hero-fig img{display:block;width:100%;height:auto}
.coursebar{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12px;letter-spacing:.08em;color:var(--muted);padding:10px 14px;margin-bottom:14px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.coursebar a{color:var(--acc);text-decoration:none}
.lessonnav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:34px}
.lessonnav a{display:flex;flex-direction:column;gap:4px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--text);background:var(--panel)}
.lessonnav a:hover{border-color:var(--acc)}
.lessonnav .mono{font-size:11px;letter-spacing:.14em;color:var(--acc)}
.lessonnav .ln-n{text-align:right;grid-column:2}
.steps{margin-top:12px;display:flex;flex-direction:column;gap:10px}
.step{display:flex;gap:16px;align-items:flex-start;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--panel);text-decoration:none;color:var(--text)}
.step:hover{border-color:var(--acc)}
.step .ln{font:500 13px 'DM Mono',monospace;color:var(--acc);width:24px;padding-top:3px}
.step .sb{display:flex;flex-direction:column;gap:4px;min-width:0}
.step .lt{font-size:17px;font-weight:600}
.step .mono{font-size:11px;letter-spacing:.12em}
@media (max-width:560px){.lessonnav{grid-template-columns:1fr}.lessonnav .ln-n{grid-column:auto;text-align:left}}

/* ---- header ticker ---- */
.ticker{display:flex;align-items:center;gap:6px;font-size:12px}
.tk{display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border:1px solid var(--line);border-radius:8px;background:var(--panel);white-space:nowrap}
.tk i{font-style:normal;color:var(--acc)}
.tk b{font-weight:500;color:var(--text);font-variant-numeric:tabular-nums}
.ticker.stale .tk b{color:var(--muted)}
.top-logo{display:none;flex:none;line-height:0}
.top-logo img{display:block;width:34px;height:34px}
.tabbar{display:none}
@media (max-width:820px){
  .top{height:56px;padding:0 12px;gap:8px}
  .top-logo{display:block}
  .searchbtn{flex:none;width:40px;height:40px;padding:0;justify-content:center;order:5}
  .searchbtn .grow,.searchbtn kbd{display:none}
  .spacer{display:none}
  .ticker{flex:1;min-width:0;gap:5px;overflow:hidden}
  .tk{padding:5px 8px;gap:5px;font-size:11.5px}
  .btn.theme{order:6;width:40px;height:40px;padding:0;display:inline-flex;align-items:center;justify-content:center;overflow:hidden;}
  .btn.theme .tl{display:none}.btn.theme .mono{font-size:18px;letter-spacing:0;line-height:1}
  .xbtn{display:none}
  .tabbar{display:grid;grid-template-columns:repeat(6,1fr);position:fixed;left:0;right:0;bottom:0;z-index:40;background:var(--bg);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px));box-shadow:0 -8px 24px rgba(0,0,0,.18)}
  .tab-i{display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 2px;border-radius:10px;text-decoration:none;color:var(--muted);font:600 10.5px 'Instrument Sans',system-ui,sans-serif;min-width:0}
  .tab-i svg{width:22px;height:22px}
  .tab-i.on{color:var(--acc);background:var(--sel)}
  body{padding-bottom:calc(66px + env(safe-area-inset-bottom,0px))}
  .foot{padding:18px 16px}
  .flinks{flex-wrap:wrap;gap:10px 18px}
}
@media (max-width:380px){.tk:nth-child(2) i{display:none}.tab-i span{font-size:9.5px}}

/* ---- research / curated ---- */
:root,[data-theme="dark"]{--ok:#5FD3C6;--warn:#F2C14E;--bad:#FF7A6B;--info:#7FB3FF}
[data-theme="light"]{--ok:#0B7F73;--warn:#9A6B00;--bad:#B3362B;--info:#2F5FB3}
.readprog{position:fixed;left:0;right:0;top:0;height:3px;z-index:60;background:transparent}
.readprog i{display:block;height:3px;width:0;background:var(--acc)}
.lfilter{margin:14px 0 22px}
.lfilter input{width:100%;max-width:420px;padding:10px 14px;background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:10px;font:15px 'Instrument Sans',system-ui,sans-serif}
.skimbar{display:flex;align-items:center;gap:12px;margin:22px 0 6px;flex-wrap:wrap}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}
.seg button{border:0;background:transparent;color:var(--muted);font:600 13px 'Instrument Sans',system-ui,sans-serif;padding:8px 14px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--acc);color:var(--accText)}
.entry-m[data-mode="skim"] .fullonly{display:none}
.bl{margin:18px 0;padding:22px;border:1px solid var(--line);border-left:4px solid var(--acc);border-radius:12px;background:var(--panel)}
.bl p{margin:8px 0 0;font-family:'Fraunces',serif;font-size:24px;line-height:1.3}
.score{display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.score>div{display:flex;flex-direction:column;gap:6px}
.meter{display:inline-flex;gap:4px}
.meter i{width:22px;height:8px;border-radius:3px;background:var(--line)}
.meter i.on{background:var(--acc)}
.biaspill{display:inline-block;font:600 12px 'DM Mono',monospace;padding:3px 10px;border-radius:999px;border:1px solid var(--line);width:max-content}
.biaspill.high{color:var(--bad);border-color:var(--bad)}.biaspill.medium{color:var(--warn);border-color:var(--warn)}.biaspill.low{color:var(--ok);border-color:var(--ok)}
.fine{font-size:13px;color:var(--muted)}
.small{font-size:13px}
.claims{display:flex;flex-direction:column;gap:8px;margin-top:10px}
.claim{border:1px solid var(--line);border-radius:12px;background:var(--panel);overflow:hidden}
.claim summary{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;cursor:pointer;list-style:none}
.claim summary::-webkit-details-marker{display:none}
.claim .chk{flex:none;font:600 11px 'DM Mono',monospace;letter-spacing:.06em;text-transform:uppercase;padding:4px 9px;border-radius:999px;border:1px solid currentColor;margin-top:1px}
.claim .ct{flex:1;font-size:16px}
.claim p{margin:0;padding:0 16px 16px 16px;color:var(--muted);font-size:15px}
.claim.supported .chk{color:var(--ok)}.claim.mixed .chk{color:var(--warn)}.claim.disputed .chk{color:var(--bad)}.claim.unverified .chk{color:var(--info)}.claim.opinion .chk{color:var(--muted)}
.claim[open]{border-color:var(--acc)}
.annos{display:flex;flex-direction:column;gap:14px;margin-top:10px}
.anno{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}
.anno .aq{margin:0;padding:18px;border-right:1px solid var(--line);background:var(--code);font-style:normal}
.anno .aq p{margin:8px 0 0;font-family:'Fraunces',serif;font-style:italic;font-size:17px;line-height:1.45;color:var(--text)}
.anno .an{padding:18px;display:flex;flex-direction:column;align-items:flex-start;gap:6px}
.anno .an p{margin:0;font-size:15.5px;line-height:1.6}
.btn.small{padding:5px 11px;font-size:12px;margin-top:6px}
.stance{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:10px}
.sc{padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.sc ul{margin:8px 0 0;padding-left:1.1em;font-size:15px}
.sc li{margin:.4em 0}
.sc.agree{border-top:3px solid var(--ok)}.sc.pushback{border-top:3px solid var(--bad)}.sc.missing{border-top:3px solid var(--info)}
.tscroll{overflow-x:auto}
.dtable{width:100%;border-collapse:collapse;font-size:14.5px;margin-top:10px}
.dtable th{text-align:left;font:600 11px 'DM Mono',monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);padding:8px 10px;border-bottom:1px solid var(--line)}
.dtable td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}
.godeep{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px;margin-top:10px}
.actions{display:flex;gap:10px;margin:24px 0 8px;flex-wrap:wrap}
section[id]{scroll-margin-top:8px}
@media (max-width:700px){.anno{grid-template-columns:1fr}.anno .aq{border-right:0;border-bottom:1px solid var(--line)}.stance{grid-template-columns:1fr}.bl p{font-size:20px}}

.launch{border:1px solid var(--line,rgba(245,237,230,.12));border-radius:14px;padding:28px;margin:0 0 24px;display:flex;flex-direction:column;gap:12px;align-items:flex-start}.launch-k{font-size:11px;letter-spacing:.14em;color:var(--accent,#F28C1E)}.launch p{margin:0}.btn.small{height:auto}

.entry.wide .entry-m{max-width:none}.entry.wide .prose{max-width:760px}

.pdfdlg{width:min(960px,94vw);height:min(90vh,900px);padding:0;border:1px solid var(--line);border-radius:14px;background:var(--panel);color:var(--text)}
.pdfdlg[open]{display:flex;flex-direction:column}.pdfdlg::backdrop{background:rgba(8,6,12,.72)}
.pdfdlg iframe{flex:1;border:0;width:100%;background:#fff}
.pdfbar{display:flex;gap:10px;justify-content:space-between;align-items:center;padding:10px 14px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.pdfbar .mono{font-size:12px;color:var(--muted);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pdfact{display:flex;gap:8px;flex-wrap:wrap}.pdfdlg .fine{margin:0;padding:8px 14px}
.srccard .actions{margin-top:14px}
.srccard .covershot{display:block;width:170px;margin:0 0 16px;padding:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff;cursor:pointer;box-shadow:var(--shadow)}
.srccard .covershot img{display:block;width:100%;height:auto}
.srccard::after{content:"";display:block;clear:both}
@media (max-width:600px){.srccard .covershot{width:130px}}

.share-row{display:flex;flex-wrap:wrap;gap:8px}
.share-row .btn{display:inline-flex;align-items:center;gap:8px}

/* ===== learning components ===== */
.vid{margin:28px 0}
.vid-frame{position:relative;aspect-ratio:16/9;background:#000;border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.vid-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.vid figcaption{display:flex;flex-wrap:wrap;gap:4px 12px;align-items:baseline;margin-top:10px;font-size:14px}
.vid-t{font-weight:600}
.vid-yt{margin-left:auto;font-size:12px;color:var(--muted);text-decoration:none}.vid-yt:hover{color:var(--acc)}
.xpost{margin:28px 0}.xpost blockquote{margin:0}
.bigstat{margin:28px 0;padding:26px 28px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(135deg,var(--panel),var(--code));text-align:center}
.bigstat-n{font-family:'Fraunces',serif;font-weight:600;font-size:clamp(40px,7vw,68px);line-height:1;color:var(--acc);letter-spacing:-.01em}
.bigstat-c{margin-top:8px;color:var(--muted);font-size:16px}
.keyidea{margin:28px 0;padding:20px 24px;border-left:4px solid var(--acc);background:var(--sel);border-radius:0 14px 14px 0}
.keyidea .lbl{margin-bottom:6px}.keyidea p{margin:6px 0}.keyidea p:last-child{margin-bottom:0}
a.term{color:inherit;text-decoration:underline dotted var(--acc);text-underline-offset:3px;cursor:help}
a.term:hover{color:var(--acc)}
.tip{position:absolute;z-index:60;max-width:320px;padding:10px 14px;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);font-size:14px;line-height:1.45;pointer-events:none}
/* quiz */
.qz{margin:32px 0;padding:22px 24px;border:1px solid var(--line);border-radius:16px;background:var(--panel)}
.qz-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.qz-q{border:0;padding:14px 0;margin:0;border-top:1px solid var(--line)}
.qz-q legend{padding:0 0 10px;font-weight:600;font-size:17px}
.qz-n{color:var(--acc);margin-right:6px;font-size:12px}
.qz-o{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;margin:4px 0;border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:background .15s,border-color .15s}
.qz-o:hover{background:var(--hover)}
.qz-o input{margin-top:3px;accent-color:var(--acc)}
.qz-q.ok .qz-o.is-ok,.qz-q.bad .qz-o.is-ok{border-color:#3DBE85;background:rgba(61,190,133,.12)}
.qz-q.bad .qz-o.is-bad{border-color:#E5575A;background:rgba(229,87,90,.12)}
.qz-why{margin:8px 0 0;padding:10px 14px;border-radius:10px;background:var(--code);font-size:14px;color:var(--muted)}
.qz-foot{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:12px}
.qz.perfect .qz-result{color:#3DBE85}
/* challenge */
.ch{margin:32px 0;padding:22px 24px;border:1px dashed var(--acc);border-radius:16px;background:var(--code)}
.ch-head{display:flex;flex-wrap:wrap;gap:4px 14px;align-items:baseline;margin-bottom:8px}
.ch-t{font-family:'Fraunces',serif;font-weight:600;font-size:20px}
.ch-p{font-size:17px;margin:8px 0 12px}
.ch-in{display:flex;gap:10px;align-items:center}
.ch-in input{flex:1;max-width:320px;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text);font:500 18px 'DM Mono',monospace}
.ch-in input:focus{outline:2px solid var(--acc);outline-offset:1px}
.ch-opts{display:flex;flex-wrap:wrap;gap:8px}
.ch-opt{display:flex;gap:8px;align-items:center;padding:10px 14px;border:1px solid var(--line);border-radius:10px;cursor:pointer;background:var(--bg)}
.ch-opt input{accent-color:var(--acc)}
.ch-foot{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:12px}
.ch.solved{border-style:solid;border-color:#3DBE85}
.ch.solved .ch-result{color:#3DBE85}
.ch-success{margin-top:12px;padding:12px 14px;border-radius:10px;background:rgba(61,190,133,.12);border:1px solid rgba(61,190,133,.4)}
.ch-hinttext{flex-basis:100%;font-size:14px}
/* flip cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin:28px 0}
.cards .fine{grid-column:1/-1;margin:0}
.card3d{perspective:900px;height:150px;border:0;background:transparent;padding:0;cursor:pointer;text-align:left;color:var(--text);font:inherit}
.card3d-in{position:relative;display:block;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.card3d.flip .card3d-in{transform:rotateY(180deg)}
.card3d-f,.card3d-b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:16px;border-radius:14px;backface-visibility:hidden;text-align:center;font-size:15px;line-height:1.4}
.card3d-f{background:var(--panel);border:1px solid var(--line);font-family:'Fraunces',serif;font-weight:600;font-size:19px}
.card3d-b{background:var(--acc);color:var(--accText);transform:rotateY(180deg)}
/* tickable steps */
.steps-i{list-style:none;padding:0;margin:24px 0;display:flex;flex-direction:column;gap:8px}
.steps-i label{display:flex;gap:14px;align-items:flex-start;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:var(--panel);cursor:pointer}
.steps-i input{margin-top:4px;accent-color:var(--acc)}
.steps-i input:checked ~ span{opacity:.6;text-decoration:line-through}
.st-n{color:var(--acc);margin-top:3px;font-size:12px}
/* course page */
.cprog{margin:28px 0 8px;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.cp-bar{height:8px;border-radius:4px;background:var(--line);overflow:hidden}
.cp-fill{height:100%;width:0;background:var(--acc);transition:width .4s}
.cp-row{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:12px}
.lesson .lt{display:flex;flex-direction:column;gap:3px;min-width:0}
.lesson .lsum{font-size:13px;font-weight:400}
.licons{display:flex;gap:10px;font-size:11px;color:var(--muted)}
.lmin{display:flex;align-items:center;gap:8px;white-space:nowrap}
.ldone{display:none;font-style:normal;color:#3DBE85}
.lesson.done .ldone{display:inline}
.lesson.done .ln{color:#3DBE85}
.outcomes{margin:0;padding-left:18px;font-size:14px}.outcomes li{margin:4px 0}
.lessondone{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:28px 0 4px}
.lessondone .btn.on{background:#3DBE85;color:#14101A;border-color:#3DBE85}
.lvl{display:inline-block;margin-left:8px;padding:2px 8px;border-radius:999px;font-size:10px;letter-spacing:.08em;text-transform:uppercase;vertical-align:middle}
.lvl-beginner{background:rgba(61,190,133,.18);color:#3DBE85}
.lvl-intermediate{background:rgba(242,140,30,.18);color:var(--acc)}
.lvl-advanced{background:rgba(202,98,161,.2);color:#CA62A1}
[data-theme="light"] .lvl-beginner{color:#17935F}[data-theme="light"] .lvl-advanced{color:#B04C6B}
.chips.lvls{margin-top:-4px}
.chip-lvl .lvl{margin-left:0}
/* playlist */
.epnav{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 24px}
.epnav a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--muted)}
.epnav a:hover{border-color:var(--acc);color:var(--acc)}
.pl-item{display:grid;grid-template-columns:minmax(0,1fr);gap:14px;margin:0 0 40px;padding-bottom:32px;border-bottom:1px solid var(--line)}
.pl-item .vid{margin:0}
.pl-note p{margin:8px 0}
/* glossary */
.gfilter{display:flex;gap:14px;align-items:center;max-width:560px}
.gfilter input{flex:1}
.gloss .term dt .anchor{margin-left:8px;color:var(--muted);text-decoration:none;opacity:0;font-size:13px}
.gloss .term:hover dt .anchor,.gloss .term dt .anchor:focus{opacity:1}
.gloss .term.hl{background:var(--sel);border-radius:10px;padding:8px 12px;margin:0 -12px}
.see{margin-top:6px;font-size:12px;color:var(--muted)}
.see a{color:var(--acc);text-decoration:none}
/* research cover */
.srccard .covershot.wide{width:100%;max-width:560px;background:var(--code)}
/* spacing + reading layout pass */
.prose{font-size:17px;line-height:1.65}
.prose h2{margin-top:44px;font-size:28px}
.prose h3{margin-top:30px;font-size:21px}
.prose p,.prose li{margin:0 0 16px}
.prose li{margin-bottom:8px}
.prose table{display:block;overflow-x:auto;border-collapse:collapse;margin:20px 0;font-size:15px}
.prose th,.prose td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left}
.prose th{font-family:'DM Mono',monospace;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.prose img{border-radius:12px}
.prose .fig{margin:28px 0}
.hero-fig{margin:24px 0 8px}
.hero-fig img{width:100%;border-radius:16px;border:1px solid var(--line)}
.lede{font-size:19px;line-height:1.55;max-width:720px}
.title{letter-spacing:-.015em}
.entry{margin-top:36px}
.entry-m{max-width:780px}
.facts{margin:18px 0 6px}
.lessonnav{margin-top:28px}
@media (max-width:700px){
  .prose{font-size:16px}
  .qz,.ch{padding:16px}
  .bigstat{padding:20px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .card3d{height:130px}
}
.entry.wide.solo .entry-m .prose,.entry.wide.solo .qz,.entry.wide.solo .ch,.entry.wide.solo .vid,.entry.wide.solo .bigstat,.entry.wide.solid .keyidea,.entry.wide.solo .cards,.entry.wide.solo .steps-i,.entry.wide.solo .lessonnav,.entry.wide.solo .lessondone,.entry.wide.solo .share,.entry.wide.solo .sources,.entry.wide.solo .hero-fig,.entry.wide.solo .coursebar,.entry.wide.solo .facts,.entry.wide.solo .callout{max-width:820px}
.entry.wide.solo .share{margin-top:28px}

.thumb.svg{aspect-ratio:2/1;background:#14101A}
.thumb.svg img{object-fit:cover}
.glossbanner{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 18px;margin:0 0 16px;padding:16px 20px;border:1px solid var(--line);border-radius:14px;background:var(--panel);text-decoration:none;color:inherit}
.glossbanner:hover{border-color:var(--acc)}
.gb-t{font-family:'Fraunces',serif;font-weight:600;font-size:20px}
.glossbanner .acc{margin-left:auto}
.entry.wide.solo .playlist,.entry.wide.solo .epnav{max-width:900px}
.pl-item .pl-t h3{font-size:24px;margin:6px 0 4px}
.xpost blockquote.twitter-tweet{padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.xpost blockquote.twitter-tweet a{color:var(--acc)}

/* quiz: self-checking, retry only the wrong ones, celebration */
.qz{position:relative;overflow:hidden}
.qz-q.ok{opacity:.62}
.qz-q.bad{border-left:3px solid #E5575A;padding-left:14px}
.qz-q.bad .qz-o.is-bad{border-color:#E5575A;background:rgba(229,87,90,.12)}
.qz-q.ok .qz-o.is-ok{border-color:#3DBE85;background:rgba(61,190,133,.12)}
.qz-retry{font-size:12px;color:#E5575A;margin:6px 0 0}
.qz-cele{position:absolute;inset:0;pointer-events:none;z-index:5;overflow:hidden}
.cele-dim{position:absolute;inset:0;background:rgba(20,16,26,.45);animation:cele-fade .2s both,cele-out .3s ease .9s both}
.cele-coin,.cele-conf{position:absolute;left:50%;top:50%;animation:cele-burst .95s cubic-bezier(.2,.7,.4,1) both}
.cele-coin{width:20px;height:20px;margin:-10px 0 0 -10px;border-radius:50%;background:#F28C1E;color:#fff;font:700 13px 'Fraunces',serif;font-style:normal;display:grid;place-items:center;box-shadow:0 0 8px rgba(242,140,30,.6)}
.cele-conf{width:6px;height:12px;margin:-6px 0 0 -3px;border-radius:2px}
.cele-100{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.3);opacity:0;font:700 72px 'Fraunces',serif;color:var(--acc);text-shadow:0 4px 30px rgba(242,140,30,.5);animation:cele-pop .35s cubic-bezier(.2,1.5,.3,1) .1s both,cele-lift .3s ease-in .85s both}
@keyframes cele-burst{0%{transform:translate(0,0) scale(.3);opacity:0}10%{opacity:1}100%{transform:translate(var(--dx),var(--dy)) rotate(400deg) scale(1);opacity:0}}
@keyframes cele-pop{to{opacity:1;transform:translate(-50%,-50%) scale(1)}}
@keyframes cele-lift{to{opacity:0;transform:translate(-50%,-70%) scale(1.1)}}
@keyframes cele-fade{from{opacity:0}}@keyframes cele-out{to{opacity:0}}
/* lesson complete + next up */
.lessondone .btn{position:relative;overflow:hidden}
.lessondone .btn.just::before{content:"";position:absolute;left:0;top:0;bottom:0;width:0;background:rgba(255,255,255,.35);animation:done-fill .6s ease-out both}
.lessondone .btn.on .tick{display:inline-block;animation:tick-in .45s cubic-bezier(.2,1.6,.4,1) both}
@keyframes done-fill{to{width:100%}}
@keyframes tick-in{from{opacity:0;transform:scale(0)}to{opacity:1;transform:scale(1)}}
.lessonnav .ln-n.go{position:relative;border-color:var(--acc);background:linear-gradient(90deg,transparent,rgba(242,140,30,.08));animation:next-glow 1.4s ease-in-out infinite}
.lessonnav .ln-n.go::before{content:"NEXT UP";position:absolute;top:-10px;right:14px;font:11px 'DM Mono',monospace;letter-spacing:.14em;background:var(--acc);color:#14101A;padding:2px 8px;border-radius:999px}
@keyframes next-glow{0%,100%{box-shadow:0 0 0 0 transparent}50%{box-shadow:0 0 0 6px color-mix(in srgb,var(--acc) 18%,transparent),0 0 28px color-mix(in srgb,var(--acc) 45%,transparent)}}
@media (prefers-reduced-motion:reduce){.lessonnav .ln-n.go{box-shadow:0 0 0 3px rgba(242,140,30,.35)}}

/* ===== Learn: stages (tell → show → do), topic colours, lesson intro and recap ===== */
.learn-home .title{margin-bottom:6px}
.cont{display:flex;gap:16px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:var(--panel);margin:18px 0 0}
.cont.start{border-color:var(--acc);background:linear-gradient(120deg,var(--sel),transparent 60%),var(--panel)}
.cont .cont-b{flex:1;min-width:0}.cont .cont-t{display:block;font-family:Fraunces,Georgia,serif;font-size:19px;font-weight:600;margin:2px 0 4px}
.cont .cont-m{font-size:13.5px;line-height:1.5}
.cont[hidden]{display:none}
.ring{--p:0%;--c:var(--acc);flex:0 0 auto;width:44px;height:44px;border-radius:50%;background:conic-gradient(var(--c) 0 var(--p),var(--line) var(--p));display:grid;place-items:center}
.ring i{width:32px;height:32px;border-radius:50%;background:var(--panel);display:grid;place-items:center;font:600 10.5px 'DM Mono',ui-monospace,monospace;font-style:normal;color:var(--text)}
.ring.big{width:58px;height:58px}.ring.big i{width:44px;height:44px;font-size:12px}
.ring.done{background:var(--c)}.ring.done i{color:var(--c)}
.stepper{display:flex;gap:0;margin:18px 0 10px;border:1px solid var(--line);border-radius:14px;padding:12px 8px 10px;background:var(--panel);overflow:hidden}
.stepper a{flex:1;min-width:0;text-align:center;text-decoration:none;color:var(--text);position:relative;font-size:12.5px;line-height:1.3;padding:0 4px}
.stepper a b{display:block;font-family:Fraunces,Georgia,serif;font-size:14px;font-weight:600}
.stepper a span{display:block;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stepper a i{display:block;width:12px;height:12px;border-radius:50%;margin:8px auto 0;background:var(--line);position:relative;z-index:1}
.stepper a.done i{background:var(--sc)}.stepper a.on i{background:var(--sc);box-shadow:0 0 0 4px color-mix(in srgb,var(--sc) 30%,transparent)}
.stepper a:not(:last-child):after{content:"";position:absolute;left:50%;right:-50%;bottom:5px;height:2px;background:var(--line)}
.legend{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:11px;letter-spacing:.06em;color:var(--muted);margin:0 0 6px}
.legend span{display:inline-flex;align-items:center;gap:6px}.legend i{width:9px;height:9px;border-radius:50%;background:var(--c)}
.stages{margin-top:10px}
.stage{display:grid;grid-template-columns:290px 1fr;gap:24px;padding:26px 0 8px;border-top:1px solid var(--line);margin-top:18px}
.stage-l{position:sticky;top:18px;align-self:start}
.stage-no{font:700 44px/1 Fraunces,Georgia,serif;color:var(--sc)}
.stage-l h2{font-family:Fraunces,Georgia,serif;font-size:23px;margin:4px 0 6px}
.stage-d{color:var(--muted);font-size:14px;line-height:1.5;margin:0 0 12px}
.stage-bar{height:6px;border-radius:3px;background:var(--line);overflow:hidden;margin:0 0 6px}.stage-bar b{display:block;height:100%;background:var(--sc);transition:width .4s}
.stage-pm{font-size:11px;letter-spacing:.06em;margin:0 0 14px}
.stage-out{margin:6px 0 0;padding-left:18px;font-size:13.5px;line-height:1.6}
.stage-out li{margin:0 0 4px}
.stage.complete .stage-no:after{content:" ✓";font-size:24px;vertical-align:middle}
.crow{display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center;padding:14px 16px;margin:0 0 10px;border:1px solid var(--line);border-radius:14px;background:var(--panel);text-decoration:none;color:var(--text);border-left:4px solid var(--c);transition:transform .2s,border-color .2s}
.crow:hover{transform:translateY(-1px);border-color:var(--c)}
.crow-b{min-width:0}.crow .ttag{display:block;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--c);margin-bottom:2px}
.crow-t{display:block;font-family:Fraunces,Georgia,serif;font-size:17px;font-weight:600;line-height:1.25}
.crow-m{display:block;font-size:11px;letter-spacing:.04em;margin-top:4px}
.crow .btn.small{padding:8px 12px;font-size:12px}
.crow.done .crow-cta{color:#3DBE85;border-color:rgba(61,190,133,.5)}
.learn-more{margin-top:34px;border-top:1px solid var(--line);padding-top:22px}
.more-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:12px}
.more{display:flex;flex-direction:column;gap:6px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--panel);text-decoration:none;color:var(--text);font-size:13.5px;line-height:1.5}
.more-t{font-family:Fraunces,Georgia,serif;font-size:17px;font-weight:600}
/* topic colour on cards, course pages and lessons */
.card.tcard{border-left:4px solid var(--c)}
.facts .stg,.facts .tpc{color:var(--c);border-color:color-mix(in srgb,var(--c) 50%,transparent)}
.cout{border-left:4px solid var(--c);margin:18px 0 0}.cout .fine{margin:10px 0 0;font-size:11px}
.stagelist{margin:8px 0 10px;padding-left:20px;font-size:13.5px;line-height:1.7}.stagelist .cur a{color:var(--acc);font-weight:600}
.coursebar .tdot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--c);margin-right:8px;vertical-align:1px}
.lgroup{margin:26px 0 0}.lgroup-h{display:flex;flex-direction:column;gap:2px;font-family:Fraunces,Georgia,serif;font-size:20px;margin:0 0 12px;padding-left:12px;border-left:4px solid var(--c,var(--line))}
.lgroup-h .mono{font-size:11px;letter-spacing:.14em}.lgroup-h a{color:var(--text);text-decoration:none}
.lintro{margin:0 0 26px;padding:18px 20px;border:1px solid var(--line);border-left:4px solid var(--c,var(--acc));border-radius:12px;background:var(--panel)}
.lintro-h{font-size:11px;letter-spacing:.16em;color:var(--c,var(--acc));margin-bottom:6px}
.lintro-s{margin:0 0 12px;font-size:15px;line-height:1.55}
.lintro ul{margin:6px 0 0;padding-left:20px;font-size:14px;line-height:1.6}
.lintro-c{margin:12px 0 0;font-size:11px;letter-spacing:.04em}
.recap{margin:30px 0 10px;padding:18px 20px;border:1px dashed var(--line);border-radius:12px;background:var(--panel)}
.recap[hidden]{display:none}
.recap dl{margin:12px 0 0}.recap dl>div{padding:10px 0;border-top:1px solid var(--line)}.recap dl>div:first-child{border-top:0;padding-top:0}
.recap dt{font-weight:600;margin:0 0 4px;font-size:14.5px}.recap dd{margin:0;font-size:14px;line-height:1.55}
@media (max-width:820px){
  .stage{grid-template-columns:1fr;gap:14px}
  .stage-l{position:static}
  .stage-no{font-size:32px}
  .stepper a span{display:none}
  .cont{flex-wrap:wrap}.cont .btn{width:100%;justify-content:center}
  .crow{grid-template-columns:40px 1fr;padding:12px 14px}.crow .crow-cta{grid-column:2;justify-self:start}
}

/* quiz: a clear selected state while answering; judging happens only after every question has an answer */
.qz-o:has(input:checked){border-color:var(--acc);background:var(--sel)}
.qz-o input{width:16px;height:16px;flex:0 0 16px}
.qz.checking .qz-o{cursor:progress}
.qz-chk{display:inline-flex;align-items:center;gap:10px}
.qz-bar{display:inline-block;width:120px;height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.qz-bar b{display:block;height:100%;width:0;background:var(--acc);animation:qz-fill 1s linear forwards}
@keyframes qz-fill{to{width:100%}}
@media (prefers-reduced-motion:reduce){.qz-bar b{animation-duration:.15s}}

/* recap: main points, revealed only after the lesson is complete */
.recap{border:1px solid var(--line);border-left:4px solid var(--c,var(--acc));border-radius:12px;background:var(--panel);padding:16px 20px;margin:18px 0 10px}
.recap.in .recap-b{animation:recap-in .6s ease-out both}
@keyframes recap-in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.recap-tog{background:none;border:0;padding:0;color:var(--muted);font-size:11px;letter-spacing:.14em;cursor:pointer}
.recap-tog:hover{color:var(--text)}
.recap-pts{list-style:none;margin:10px 0 0;padding:0}
.recap-pts li{display:grid;grid-template-columns:34px 1fr;gap:10px;padding:10px 0;border-top:1px solid var(--line);font-size:14.5px;line-height:1.5}
.recap-pts li:first-child{border-top:0;padding-top:0}
.recap-pts li>span>b{display:block}.recap-pts li .muted{display:block;font-size:13px;margin-top:2px}
.recap-n{color:var(--c,var(--acc));font-weight:600;font-size:13px;padding-top:2px}
@media (prefers-reduced-motion:reduce){.recap.in .recap-b{animation:none}}

/* ===== topic / stage theming on course and lesson pages: the topic colour becomes the page accent ===== */
.page.themed{--acc:var(--c);--sel:color-mix(in srgb,var(--c) 14%,transparent);--accText:#14101A;position:relative}
[data-theme="light"] .page.themed{--acc:color-mix(in srgb,var(--c) 62%,#2A2230);--sel:color-mix(in srgb,var(--c) 16%,transparent);--accText:#fff}
.page.themed:before{content:"";position:absolute;left:-24px;right:-24px;top:-24px;height:260px;pointer-events:none;z-index:-1;background:radial-gradient(60% 100% at 20% 0%,color-mix(in srgb,var(--c) 22%,transparent),transparent 70%),radial-gradient(40% 80% at 90% 0%,color-mix(in srgb,var(--sc) 14%,transparent),transparent 70%)}
.page.themed .title{background:linear-gradient(90deg,var(--text) 60%,var(--acc));-webkit-background-clip:text;background-clip:text;color:transparent}
.page.themed .prose h2{padding-left:14px;border-left:4px solid var(--acc)}
.page.themed .prose h3{color:var(--acc)}
.page.themed .prose strong{color:color-mix(in srgb,var(--acc) 55%,var(--text))}
.page.themed .prose blockquote{border-left-color:var(--acc)}
.page.themed .hero-fig{border-color:color-mix(in srgb,var(--c) 45%,var(--line));box-shadow:0 20px 60px -30px var(--c)}
.page.themed .qz{border-color:color-mix(in srgb,var(--c) 35%,var(--line))}
.page.themed .qz-head .lbl{color:var(--acc)}
.page.themed .lessonnav .ln-n{border-color:color-mix(in srgb,var(--c) 45%,var(--line));background:linear-gradient(135deg,var(--panel),var(--sel))}
.page.themed .keyidea{border-left-color:var(--acc)}
.page.themed .btn.pri{background:var(--acc);border-color:var(--acc);color:var(--accText)}
.page.themed .cp-fill{background:var(--acc)}
.page.themed .lessons .lesson.done .ln{color:#3DBE85}
.coursebar .cb-r{display:inline-flex;gap:14px;align-items:center;flex-wrap:wrap}
.coursebar .stg{color:var(--c);text-decoration:none;padding:2px 8px;border:1px solid color-mix(in srgb,var(--c) 50%,transparent);border-radius:999px}
.card .stg-pill{margin-left:8px;padding:2px 7px;border-radius:999px;font-size:10px;letter-spacing:.08em;border:1px solid color-mix(in srgb,var(--sc,var(--acc)) 50%,transparent);color:var(--sc,var(--acc))}
/* light theme: topic colours are tuned for dark panels, so text that uses them is darkened for contrast */
[data-theme="light"] :is(.coursebar a,.coursebar .stg,.lintro-h,.recap-n,.lgroup-h .mono,.crow .ttag,.facts .stg,.facts .tpc,.legend span,.stage-no,.stepper a b){color:color-mix(in srgb,var(--c,var(--sc,var(--acc))) 62%,#2A2230)}
[data-theme="light"] .stage-no{color:color-mix(in srgb,var(--sc) 62%,#2A2230)}
/* lesson figures: full-bleed on phones, tap to enlarge everywhere */
.fig img{cursor:zoom-in}
@media (max-width:820px){
  .prose .fig{margin-left:-16px;margin-right:-16px;padding:0 0 10px;border-radius:0;border-left:0;border-right:0;background:transparent}
  .prose .fig img{border-radius:0}
  .prose .fig figcaption{padding:0 16px;font-size:12.5px}
}
.figbox{position:fixed;inset:0;z-index:90;background:rgba(20,16,26,.96);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:12px;overflow:auto}
.figbox[hidden]{display:none}
.figbox img{max-width:min(1400px,100%);width:100%;height:auto;border-radius:12px;background:var(--panel)}
.figbox .figbox-x{position:fixed;top:12px;right:12px;z-index:91}
.figbox figcaption{margin-top:12px;color:var(--muted);font-size:14px;text-align:center;max-width:900px}
@media (max-width:820px){.figbox{justify-content:flex-start;padding:52px 0 24px}.figbox img{width:max(100%,900px);max-width:none;border-radius:0}.figbox figcaption{padding:0 16px}}

/* ---- Learn trailers (strip at rest, spotlight pane on first visit, Media player) ---- */
.tr-strip{display:flex;align-items:center;gap:14px;margin:4px 0 22px;padding:8px 12px 8px 8px;border:1px solid var(--line);border-radius:12px;background:var(--panel);max-width:560px}
.tr-thumb{position:relative;flex:none;width:112px;aspect-ratio:16/9;border:0;padding:0;border-radius:8px;overflow:hidden;background:#000;cursor:pointer}
.tr-thumb img{width:100%;height:100%;object-fit:cover;display:block;opacity:.85}
.tr-thumb i{position:absolute;left:50%;top:50%;width:22px;height:22px;margin:-11px 0 0 -11px;border-radius:50%;background:var(--acc);box-shadow:0 2px 8px rgba(0,0,0,.5)}
.tr-thumb i:before{content:"";position:absolute;left:9px;top:6px;border-style:solid;border-width:5px 0 5px 8px;border-color:transparent transparent transparent var(--accText,#1a1207)}
.tr-thumb:hover img,.tr-thumb:focus-visible img{opacity:1}
.tr-b{display:grid;gap:2px;min-width:0}
.tr-b b{font-family:'Fraunces',serif;font-weight:600;font-size:17px;line-height:1.2}
.tr-link{border:0;background:none;padding:0;color:var(--muted);font:500 13px 'Instrument Sans',system-ui,sans-serif;cursor:pointer;text-align:left}
.tr-link:hover{color:var(--acc)}
.tr-wrap{position:fixed;inset:0;z-index:95;background:rgba(10,7,14,.78);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;transition:opacity .3s}
.tr-wrap.on{opacity:1}
.tr-pane{width:min(960px,92vw);background:#0b0810;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 30px 90px rgba(0,0,0,.65);transform:scale(.96);transition:transform .3s}
.tr-wrap.on .tr-pane{transform:none}
.tr-v{position:relative;aspect-ratio:16/9;background:#000}
.tr-v.tall{aspect-ratio:9/16;max-height:78vh;margin:0 auto}
.tr-v video{width:100%;height:100%;display:block;object-fit:contain;background:#000}
.tr-pane:has(.tr-v.tall){width:min(420px,88vw)}
.tr-x{position:absolute;top:10px;right:10px;width:34px;height:34px;border-radius:50%;border:0;background:rgba(0,0,0,.65);color:#fff;font-size:15px;cursor:pointer;z-index:2}
.tr-x:hover{background:var(--acc);color:var(--accText)}
.tr-sound{position:absolute;left:12px;bottom:14px;border:0;border-radius:8px;background:rgba(0,0,0,.7);color:#fff;font:600 13px 'Instrument Sans',system-ui,sans-serif;padding:8px 12px;cursor:pointer;z-index:2}
.tr-sound:hover{background:var(--acc);color:var(--accText)}
.tr-prog{position:absolute;left:0;right:0;bottom:0;height:3px;background:rgba(255,255,255,.18);z-index:2}
.tr-prog i{display:block;height:100%;width:0;background:var(--acc);transition:width .25s linear}
.tr-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;color:#efe9f4}
.tr-bar b{font-family:'Fraunces',serif;font-weight:600;font-size:16px}
.tr-cta{flex:none;background:var(--acc);color:var(--accText);border-color:var(--acc)}
body.tr-open{overflow:hidden}
@media (prefers-reduced-motion:reduce){.tr-wrap,.tr-pane,.tr-prog i{transition:none}}
@media (max-width:820px){.tr-strip{max-width:none;gap:10px}.tr-thumb{width:92px}.tr-b b{font-size:15px}.tr-bar{flex-wrap:wrap}.tr-x{top:8px;right:8px}}
/* Media page player */
.tr-media{margin:24px 0 10px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--panel)}
.tr-media .tr-v.wide{aspect-ratio:16/9}
.tr-media .tr-v.tall{aspect-ratio:9/16;max-height:72vh;width:auto}
.tr-ctl{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;padding:12px;border-top:1px solid var(--line)}
.tr-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:0 12px 12px}
.tr-thumbs button{border:2px solid transparent;border-radius:8px;overflow:hidden;padding:0;background:#000;cursor:pointer;aspect-ratio:16/9}
.tr-thumbs button[aria-pressed="true"]{border-color:var(--acc)}
.tr-thumbs img{width:100%;height:100%;object-fit:cover;display:block}