:root{
  --bg:#F7F3E8; --panel:#FCF9F0; --panel2:#F0EADA; --tx:#1A1A1A; --tx2:#6E675A;
  --line:#E3DAC6; --acc:#22456B; --acc2:#1B3A5B; --accsoft:#E7EDF3;
  --hl:#8C2F2F;
  --exa:#8C3A2E; --exabg:#F5E9E2; --cand:#22456B; --candbg:#E9EDF4;
  --chip:#EFE9DA; --shadow:0 1px 3px rgba(60,50,30,.07),0 8px 24px -12px rgba(60,50,30,.16);
}
html[data-theme="light"]{
  --bg:#EDF1F6; --panel:#FBFCFE; --panel2:#E4EAF1; --tx:#141A22; --tx2:#586775;
  --line:#D3DCE6; --acc:#1F4E79; --acc2:#173A5C; --accsoft:#E2EBF5;
  --hl:#7A2E2E;
  --exa:#7C3A2D; --exabg:#F8ECE7; --cand:#1F4E79; --candbg:#E5EDF6;
  --chip:#E9EEF4; --shadow:0 1px 3px rgba(20,30,45,.08),0 8px 24px -12px rgba(20,30,45,.18);
}
html[data-theme="dark"]{
  --bg:#211D15; --panel:#2A2519; --panel2:#332D1F; --tx:#E9E3D3; --tx2:#A89F8B;
  --line:#3E3728; --acc:#9DB8D9; --acc2:#B5CBE4; --accsoft:#31405A;
  --hl:#D98E7E;
  --exa:#D9968A; --exabg:#372A22; --cand:#A9C0DE; --candbg:#28313F;
  --chip:#332D1F; --shadow:0 1px 3px rgba(0,0,0,.35),0 10px 30px -12px rgba(0,0,0,.5);
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
html[data-fs="s"]{font-size:14px}
html[data-fs="m"]{font-size:16px}
html[data-fs="l"]{font-size:18.5px}
html[data-fs="xl"]{font-size:21px}
body{margin:0;font:1rem/1.65 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--tx)}
a{color:var(--acc);text-decoration:none} a:hover{text-decoration:underline}

/* layout */
.wrap{display:flex;min-height:100vh}
#sidebar{width:300px;flex:0 0 300px;background:var(--panel);border-right:1px solid var(--line);position:sticky;top:0;height:100vh;overflow-y:auto;z-index:40;display:flex;flex-direction:column}
.side-head{padding:14px 16px 10px;border-bottom:1px solid var(--line)}
.brand-row{display:flex;align-items:flex-start;gap:8px}
.brand-row .brand{flex:1}
.hdctl{display:flex;gap:4px}
.iconbtn{white-space:nowrap}
.brand{font-weight:800;font-size:15.5px;line-height:1.3;color:var(--tx)}
.brand small{display:block;font-weight:600;color:var(--tx2);font-size:11.5px;margin-top:2px;letter-spacing:.02em}
.searchbox{margin-top:10px;position:relative}
.searchbox input{width:100%;padding:8px 30px 8px 32px;border:1px solid var(--line);border-radius:9px;background:var(--panel2);color:var(--tx);font-size:13.5px;outline:none}
.searchbox input:focus{border-color:var(--acc);box-shadow:0 0 0 3px var(--accsoft)}
.searchbox .icon{position:absolute;left:10px;top:8px;color:var(--tx2);font-size:13px}
.searchbox kbd{position:absolute;right:8px;top:8px;font-size:10.5px;color:var(--tx2);border:1px solid var(--line);border-radius:4px;padding:0 4px;background:var(--panel)}
.sr-results{position:absolute;top:38px;left:0;right:0;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);max-height:340px;overflow:auto;display:none;z-index:60}
.sr-results a{display:block;padding:8px 12px;border-bottom:1px solid var(--line);color:var(--tx)}
.sr-results a:last-child{border-bottom:none}
.sr-results a:hover{background:var(--panel2);text-decoration:none}
.sr-results .t{font-weight:700;font-size:13px}
.sr-results .s{font-size:11.5px;color:var(--tx2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sr-results mark{background:var(--accsoft);color:var(--acc)}
nav.toc{padding:10px 8px 30px;flex:1}
nav.toc details{margin:2px 0}
nav.toc summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:6px;padding:7px 10px;border-radius:8px;font-weight:700;font-size:13px;color:var(--tx)}
nav.toc summary::-webkit-details-marker{display:none}
nav.toc summary .arr{margin-left:auto;transition:transform .15s;color:var(--tx2);font-size:10px}
nav.toc details[open] summary .arr{transform:rotate(90deg)}
nav.toc summary:hover{background:var(--panel2)}
nav.toc .secnum{color:var(--acc);font-size:11px;font-weight:800;background:var(--accsoft);border-radius:5px;padding:1px 6px}
nav.toc ul{list-style:none;margin:2px 0 4px;padding:0 0 0 10px}
nav.toc li a{display:flex;align-items:center;gap:8px;padding:5.5px 10px;border-radius:8px;font-size:13px;color:var(--tx2)}
nav.toc li a:hover{background:var(--panel2);color:var(--tx);text-decoration:none}
nav.toc li a.active{background:var(--accsoft);color:var(--acc);font-weight:700}
nav.toc li a .st{margin-left:auto;font-size:10px;color:var(--cand)}
.side-foot{padding:10px 16px;border-top:1px solid var(--line);font-size:11px;color:var(--tx2)}

/* topbar (mobile) */
#topbar{display:none;position:sticky;top:0;z-index:50;background:var(--panel);border-bottom:1px solid var(--line);padding:10px 14px;align-items:center;gap:10px}
#topbar .brand{font-size:14px;flex:1}
.iconbtn{background:var(--panel2);border:1px solid var(--line);border-radius:8px;color:var(--tx);font-size:16px;line-height:1;padding:7px 10px;cursor:pointer}
.iconbtn:hover{background:var(--panel)}
#overlay{display:none;position:fixed;inset:0;background:rgba(2,8,20,.5);z-index:35}

/* content */
main{flex:1;min-width:0;padding:34px clamp(18px,5vw,64px) 90px}
.article{max-width:840px;margin:0 auto}
.eyebrow{color:var(--acc);font-weight:800;font-size:12px;letter-spacing:.08em;text-transform:uppercase}
h1.chap{font-size:clamp(26px,4vw,34px);line-height:1.15;margin:6px 0 8px;letter-spacing:-.01em}
.byline{color:var(--tx2);font-size:14px;margin-bottom:4px}
.metarow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:14px 0 8px}
.chip{background:var(--chip);border:1px solid var(--line);color:var(--tx2);font-size:11.5px;padding:3px 10px;border-radius:999px;font-weight:600}
.btnrow{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 6px}
.btn{border:1px solid var(--line);background:var(--panel);color:var(--tx);border-radius:9px;padding:7px 14px;font-size:13px;font-weight:600;cursor:pointer}
.btn:hover{border-color:var(--acc);color:var(--acc)}
.btn.done{background:var(--candbg);border-color:var(--cand);color:var(--cand)}
hr.sep{border:none;border-top:1px solid var(--line);margin:20px 0 26px}

.pgbadge{display:flex;align-items:center;gap:10px;margin:30px 0 14px;color:var(--tx2);font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.pgbadge::after{content:"";flex:1;border-top:1px dashed var(--line)}
h2.x{font-size:22px;margin:26px 0 10px;letter-spacing:-.01em;scroll-margin-top:80px}
h3.x{font-size:17.5px;margin:20px 0 8px;scroll-margin-top:80px}
h2.x a.anchor,h3.x a.anchor{opacity:0;margin-left:8px;font-size:.75em;color:var(--acc)}
h2.x:hover a.anchor,h3.x:hover a.anchor{opacity:1}
.article p{margin:0 0 13px}
.dlg{border-left:3px solid var(--acc);background:var(--panel);border-radius:0 10px 10px 0;padding:10px 14px 10px 12px;margin:0 0 12px;box-shadow:var(--shadow)}
.dlg .who{display:inline-block;font-size:10.5px;font-weight:800;letter-spacing:.1em;padding:1px 8px;border-radius:999px;margin-bottom:5px}
.dlg.examiner{border-left-color:var(--exa);background:var(--exabg)}
.dlg.examiner .who{color:var(--exa);background:rgba(180,83,9,.12)}
.dlg.candidate{border-left-color:var(--cand);background:var(--candbg)}
.dlg.candidate .who{color:var(--cand);background:rgba(4,120,87,.12)}
.article ul{margin:0 0 13px;padding-left:22px}
.article li{margin:0 0 6px}
figure.fig{margin:18px 0;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px;box-shadow:var(--shadow)}
figure.fig img{width:100%;height:auto;border-radius:6px;cursor:zoom-in;display:block}
figure.fig.tableimg{background:var(--panel2)}
figure.fig figcaption{font-size:11.5px;color:var(--tx2);padding:7px 4px 2px;display:flex;justify-content:space-between;gap:8px}
mark{background:#EBD98C;color:inherit;border-radius:2px;padding:0 1px}
html[data-theme="dark"] mark{background:#6E5A1E;color:#F5EFE0}
.article b{font-weight:700}
.article u,.article .cite{text-decoration:underline;text-decoration-color:var(--acc);text-decoration-thickness:1.5px;text-underline-offset:2.5px}

.para-fig{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px;align-items:start;margin:0 0 13px}
.para-fig .para-text > *{margin-bottom:0}
.figside{margin:0;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:8px;box-shadow:var(--shadow);position:sticky;top:16px}
.figside img{width:100%;height:auto;max-height:300px;object-fit:contain;border-radius:6px;cursor:zoom-in;display:block;background:var(--panel2)}
.figside figcaption{display:flex;flex-direction:column;gap:2px;font-size:11px;color:var(--tx2);padding:6px 2px 1px}
.figside .fr{font-weight:800;color:var(--acc);letter-spacing:.04em;text-transform:uppercase;font-size:10.5px}
.figside .fc{line-height:1.4;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.figside .fp{font-variant-numeric:tabular-nums;opacity:.8}
.capline{font-size:12.5px;color:var(--tx2);font-style:italic;margin:2px 0 14px !important}
@media (max-width:1100px){
  .para-fig{grid-template-columns:1fr;gap:8px}
  .figside{position:static;display:flex;align-items:center;gap:10px;padding:6px}
  .figside img{width:132px;flex:0 0 132px;max-height:104px}
  .figside figcaption{padding:0;font-size:10.5px}
}

/* rsvp speed reader */
#rsvp{position:fixed;inset:0;z-index:100;background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:14px}
#rsvp[hidden]{display:none}
.rsvp-stage{width:min(1500px,96vw);height:min(70vh,780px);display:flex;align-items:center;justify-content:center;position:relative;background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.rsvp-guides{position:absolute;left:0;right:0;top:50%;height:0}
.rsvp-guides::before,.rsvp-guides::after{content:"";position:absolute;width:34px;border-top:1px solid var(--line)}
.rsvp-guides::before{left:18px}.rsvp-guides::after{right:18px}
#rsvp-word{font:600 clamp(28px,6vw,58px)/1.25 Georgia,'Times New Roman',serif;text-align:center;max-width:88vw;word-break:break-word;color:var(--tx)}
#rsvp-word .orp{color:var(--hl)}
.rsvp-sent{font-size:clamp(17px,2.6vw,26px);line-height:1.5}
#rsvp-word.rsvp-chunk{width:100%;display:block}
.rsvp-chunkline{display:grid;grid-template-columns:1fr auto 1fr;align-items:baseline;width:100%;font:600 clamp(19px,3vw,36px)/1.35 Georgia,'Times New Roman',serif}
.cl-left{justify-self:end;text-align:right;opacity:.48;padding-right:.4em;white-space:nowrap}
.cl-pivot{white-space:nowrap;font-weight:800;letter-spacing:.01em}
.cl-pivot .orp2{font-weight:900;opacity:1}
.cl-right{justify-self:start;text-align:left;opacity:.48;padding-left:.4em;white-space:nowrap}
.rsvp-hud{position:absolute;top:12px;right:16px;font-size:12px;color:var(--tx2);font-variant-numeric:tabular-nums}
.rsvp-progress{width:min(1500px,96vw);height:14px;background:var(--panel2);border-radius:99px;overflow:hidden;cursor:pointer;touch-action:none;display:flex;align-items:center}
#rsvp-fill{height:6px;width:0%;background:var(--acc);border-radius:99px;transition:width .08s}
.rsvp-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center;width:min(1500px,96vw)}
.rsvp-bar .grp{display:flex;align-items:center;gap:6px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:6px 10px}
.rsvp-bar button{background:var(--panel2);border:1px solid var(--line);color:var(--tx);border-radius:8px;padding:6px 12px;font-size:14px;cursor:pointer}
.rsvp-bar button:hover{border-color:var(--acc);color:var(--acc)}
.rsvp-bar button.primary{background:var(--acc);border-color:var(--acc);color:#F7F3E8;font-weight:700;min-width:86px}
html[data-theme="dark"] .rsvp-bar button.primary{color:#211D15}
.rsvp-bar input[type=range]{width:150px;accent-color:var(--acc)}
.rsvp-sel{background:var(--panel2);border:1px solid var(--line);color:var(--tx);border-radius:8px;padding:5px 6px;font-size:12.5px;outline:none;cursor:pointer}
.rsvp-bar .seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.rsvp-bar .seg button{border:none;border-radius:0;background:var(--panel);padding:6px 10px;font-size:12.5px}
.rsvp-bar .seg button.on{background:var(--acc);color:#F7F3E8}
html[data-theme="dark"] .rsvp-bar .seg button.on{color:#211D15}
.rsvp-bar .val{font-size:12.5px;color:var(--tx2);min-width:56px;font-variant-numeric:tabular-nums}
.rsvp-hint{font-size:12px;color:var(--tx2)}
.rsvp-figwrap{display:flex;flex-direction:column;align-items:center;gap:12px;max-width:100%;max-height:100%;padding:8px}
.rsvp-figwrap img{max-width:100%;max-height:100%;object-fit:contain;border-radius:10px;border:1px solid var(--line);background:var(--panel2)}
.rsvp-figlab{font-size:13px;color:var(--tx2);text-align:center}
.rsvp-figlab b{color:var(--acc)}
.rsvp-figpanel{position:absolute;bottom:14px;right:16px;width:min(260px,26vw);max-height:52%;display:flex;flex-direction:column;gap:6px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:8px;box-shadow:var(--shadow);z-index:6}
.rsvp-figpanel[hidden]{display:none}
.rsvp-figpanel img{width:100%;height:auto;max-height:100%;object-fit:contain;border-radius:6px;background:var(--panel2);cursor:zoom-in}
.rsvp-figpanel-cap{font-size:11.5px;color:var(--tx2);text-align:center;line-height:1.4}
.rsvp-figpanel-cap b{color:var(--acc)}
@media (max-width:760px){.rsvp-figpanel{width:132px;bottom:10px;right:10px;max-height:42%}.rsvp-figpanel-cap{font-size:9.5px}.rsvp-ctx{font-size:13px;top:12px;left:12px;right:12px;max-height:64px}.rsvp-hud{font-size:10.5px}.rsvp-bar{gap:6px}.rsvp-bar .grp{padding:4px 6px}.rsvp-bar button{padding:5px 9px;font-size:12.5px}.rsvp-hint{display:none}.rsvp-sent{font-size:clamp(15px,2.2vw,22px)}}
.rsvp-ctx{position:absolute;top:42px;left:22px;right:150px;font-size:15px;line-height:1.6;color:var(--tx2);text-align:center;display:none;max-height:84px;overflow:hidden}
.rsvp-ctx .done{opacity:.35}
.rsvp-ctx .cur{color:var(--hl);font-weight:700;background:var(--accsoft);border-radius:4px;padding:0 3px}

/* side-figure toggle off */
body.no-sidefig .para-fig{grid-template-columns:1fr}
body.no-sidefig .figside{display:none}
html[data-theme="dark"] .rsvp-bar button.primary,html[data-theme="dark"] .rsvp-bar .seg button.on{color:#211D15}

.pagenav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:46px}
.pagenav a{border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:12px 16px;box-shadow:var(--shadow)}
.pagenav a:hover{text-decoration:none;border-color:var(--acc)}
.pagenav .lab{font-size:10.5px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--tx2)}
.pagenav .ti{font-weight:700;font-size:14.5px;margin-top:2px}
.pagenav a.next{text-align:right}

#progress{position:fixed;top:0;left:0;height:3px;background:var(--acc);width:0;z-index:80;transition:width .1s}

/* home */
.hero{background:linear-gradient(135deg,var(--accsoft),var(--panel));border:1px solid var(--line);border-radius:18px;padding:30px clamp(20px,4vw,44px);box-shadow:var(--shadow);margin-bottom:26px}
.hero h1{font-size:clamp(26px,4.5vw,40px);margin:6px 0 8px;letter-spacing:-.02em}
.hero p{color:var(--tx2);max-width:640px;margin:0 0 14px}
.statrow{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 18px}
.stat .n{font-size:22px;font-weight:800;color:var(--acc)}
.stat .l{font-size:11.5px;color:var(--tx2);font-weight:600}
.cardgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin-top:14px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow);transition:transform .12s, border-color .12s}
.card:hover{transform:translateY(-2px);border-color:var(--acc)}
.card .k{color:var(--acc);font-size:11px;font-weight:800;letter-spacing:.07em;text-transform:uppercase}
.card h3{margin:4px 0 6px;font-size:16.5px}
.card p{color:var(--tx2);font-size:12.5px;margin:0}
.continue{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow);margin-bottom:26px}
.continue .bar{flex:1}
.continue .bar .track{height:6px;background:var(--panel2);border-radius:99px;overflow:hidden;margin-top:6px}
.continue .bar .fill{height:100%;background:var(--acc);border-radius:99px}

/* lightbox */
dialog#lb{border:none;background:transparent;max-width:96vw;max-height:96vh;padding:0}
dialog#lb img{max-width:94vw;max-height:90vh;border-radius:8px}
dialog#lb::backdrop{background:rgba(5,10,20,.82)}

@media (max-width:920px){
  #topbar{display:flex}
  #sidebar{position:fixed;left:0;top:0;bottom:0;height:100dvh;transform:translateX(-105%);transition:transform .2s;box-shadow:var(--shadow);width:min(320px,86vw);flex-basis:auto}
  #sidebar.open{transform:none}
  #overlay.show{display:block}
  main{padding:22px 16px 70px}
  .pagenav{grid-template-columns:1fr}
  .pagenav a.next{text-align:left}
}
@media print{ #sidebar,#topbar,#progress,.btnrow,.pagenav{display:none} .dlg{box-shadow:none} }