:root{
  --bg:#f7f7f5; --surface:#ffffff; --surface2:#f0f0ee; --ink:#101418; --ink2:#4b5563; --ink3:#6b7280;
  --line:#e4e4e0; --accent:#0b5cad; --accent2:#0e7490; --gold:#b45309;
  --hero-bg:#05070d; --hero-ink:#f4f6fb; --hero-ink2:#a7b0c2;
  --radius:18px; --shadow:0 1px 2px rgba(16,20,24,.05),0 10px 34px -14px rgba(16,20,24,.16);
  --shadow-lg:0 2px 4px rgba(16,20,24,.06),0 24px 54px -18px rgba(16,20,24,.28);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-serif:"Iowan Old Style",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
[data-theme="dark"]{
  --bg:#0a0d13; --surface:#12161f; --surface2:#171c28; --ink:#eef1f7; --ink2:#b6bdcc; --ink3:#8b94a7;
  --line:#232a3a; --accent:#5aa2e8; --accent2:#38b6cf;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 12px 34px -14px rgba(0,0,0,.55);
  --shadow-lg:0 2px 4px rgba(0,0,0,.45),0 26px 54px -18px rgba(0,0,0,.65);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:860px;margin:0 auto;padding:0 24px}
::selection{background:#0b5cad;color:#fff}

/* header */
header.site{position:sticky;top:0;z-index:60;backdrop-filter:blur(14px) saturate(1.5);-webkit-backdrop-filter:blur(14px) saturate(1.5);background:color-mix(in srgb,var(--bg) 78%,transparent);border-bottom:1px solid var(--line)}
header.site .bar{display:flex;align-items:center;gap:18px;padding-top:13px;padding-bottom:13px}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);margin-right:auto}
.logo-mark{width:38px;height:38px;border-radius:11px;flex:none;box-shadow:var(--shadow)}
.logo b{font-size:16.5px;letter-spacing:-.01em;display:block;line-height:1.15}
.logo span{font-size:12px;color:var(--ink3);display:block;line-height:1.2}
nav.main{display:flex;gap:4px}
nav.main a{color:var(--ink2);text-decoration:none;font-size:14.5px;font-weight:550;padding:8px 13px;border-radius:999px}
nav.main a:hover{background:var(--surface2);color:var(--ink)}
.icon-btn{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--ink2);width:38px;height:38px;border-radius:999px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:16px;flex:none}
.icon-btn:hover{color:var(--ink);border-color:var(--ink3)}
@media(max-width:720px){nav.main a{padding:8px 8px;font-size:13.5px}.logo span{display:none}}

/* hero */
.hero{position:relative;background:var(--hero-bg);color:var(--hero-ink);overflow:hidden}
.hero canvas.net{position:absolute;inset:0;width:100%;height:100%;opacity:.55}
.hero .glow{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none}
.hero .glow-a{width:560px;height:560px;background:rgba(11,92,173,.42);top:-220px;right:-120px}
.hero .glow-b{width:460px;height:460px;background:rgba(14,116,144,.34);bottom:-240px;left:-100px}
.hero-inner{position:relative;padding:92px 0 84px;max-width:820px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;letter-spacing:.15em;font-size:12.5px;font-weight:650;text-transform:uppercase;color:#9fd8e8;margin:0 0 22px}
.eyebrow::before{content:"";width:26px;height:2px;background:linear-gradient(90deg,#38b6cf,#5aa2e8);border-radius:2px}
.hero h1{font-family:var(--font-serif);font-weight:600;font-size:clamp(40px,6.2vw,64px);line-height:1.08;letter-spacing:-.015em;margin:0 0 22px}
.hero h1 em{font-style:italic;background:linear-gradient(92deg,#7dd3fc,#5eead4);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{font-size:clamp(17px,2.2vw,20.5px);color:var(--hero-ink2);max-width:660px;margin:0 0 34px;line-height:1.6}
.hero-ctas{display:flex;flex-wrap:wrap;gap:13px;margin-bottom:46px}
.btn{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-weight:600;font-size:15.5px;padding:13px 24px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:#fff;color:#0a1020;box-shadow:0 10px 30px -10px rgba(255,255,255,.35)}
.btn-ghost{background:rgba(255,255,255,.06);color:var(--hero-ink);border-color:rgba(255,255,255,.24)}
.btn-ghost:hover{background:rgba(255,255,255,.13)}
.hero-stats{display:flex;flex-wrap:wrap;gap:14px 44px;border-top:1px solid rgba(255,255,255,.14);padding-top:28px}
.hero-stats .stat b{font-size:25px;font-weight:700;letter-spacing:-.02em;display:block;line-height:1.1}
.hero-stats .stat span{font-size:13px;color:var(--hero-ink2);letter-spacing:.04em;text-transform:uppercase}

/* sections */
section.block{padding:74px 0 8px}
.sec-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}
.sec-head h2{font-family:var(--font-serif);font-size:clamp(27px,3.6vw,36px);font-weight:600;letter-spacing:-.01em;margin:0}
.sec-head p{color:var(--ink2);margin:6px 0 0;max-width:560px}
.kicker{letter-spacing:.14em;font-size:12px;font-weight:650;text-transform:uppercase;color:var(--accent2);margin:0 0 10px}

/* featured */
.featured-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:860px){.featured-grid{grid-template-columns:1fr}}

/* cards */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card .cover-art{width:100%;height:172px;display:block}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:11px;flex:1}
.card-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--ink3);flex-wrap:wrap}
.pnum{font-family:var(--font-mono);font-weight:700;color:var(--accent2);letter-spacing:.06em}
.cat{font-weight:650;letter-spacing:.07em;text-transform:uppercase;font-size:11.5px;color:var(--ink2)}
.doi-badge{margin-left:auto;font-family:var(--font-mono);font-size:11px;font-weight:600;color:#0f766e;background:rgba(20,184,166,.13);border:1px solid rgba(20,184,166,.35);padding:2.5px 9px;border-radius:999px;text-decoration:none}
[data-theme="dark"] .doi-badge{color:#5eead4}
.card h3{font-family:var(--font-serif);font-size:21px;line-height:1.32;font-weight:600;margin:0}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a:hover{color:var(--accent)}
.card .abs{font-size:14.8px;color:var(--ink2);margin:0;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;padding-top:6px;display:flex;flex-direction:column;gap:13px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:12px;color:var(--ink2);background:var(--surface2);border:1px solid var(--line);border-radius:999px;padding:3px 10px}
.card-actions{display:flex;gap:9px;flex-wrap:wrap;align-items:center}
.act{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;text-decoration:none;padding:8px 15px;border-radius:999px;border:1px solid var(--line);color:var(--ink);background:var(--surface)}
.act:hover{border-color:var(--accent);color:var(--accent)}
.act.solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.act.solid:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.act.quiet{border-color:transparent;color:var(--accent);padding-left:6px;padding-right:6px}
.featured-grid .card .cover-art{height:210px}
.featured-grid .card h3{font-size:24px}
.featured-grid .card .abs{-webkit-line-clamp:5}

/* toolbar */
.toolbar{position:sticky;top:65px;z-index:40;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:16px 0 14px;margin-bottom:8px}
.toolbar-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.searchbox{flex:1;min-width:230px;display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:10px 18px;box-shadow:var(--shadow)}
.searchbox input{border:none;outline:none;background:transparent;font:inherit;font-size:15px;color:var(--ink);width:100%}
.searchbox kbd{font-family:var(--font-mono);font-size:11px;color:var(--ink3);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:1px 6px}
.pills{display:flex;gap:8px;flex-wrap:wrap}
.pill{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--ink2);font:inherit;font-size:13.5px;font-weight:600;padding:9px 16px;border-radius:999px;cursor:pointer}
.pill:hover{color:var(--ink)}
.pill[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.result-line{font-size:13.5px;color:var(--ink3);margin:12px 2px 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:1020px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.grid{grid-template-columns:1fr}}
.empty{display:none;text-align:center;padding:56px 20px;color:var(--ink2);border:1.5px dashed var(--line);border-radius:var(--radius)}
.empty b{font-family:var(--font-serif);font-size:21px;color:var(--ink);display:block;margin-bottom:6px}

/* themes */
.themes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:860px){.themes{grid-template-columns:1fr}}
.theme{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.theme .t-icon{width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;margin-bottom:17px}
.theme h3{font-family:var(--font-serif);font-size:20.5px;margin:0 0 9px}
.theme p{font-size:15px;color:var(--ink2);margin:0 0 14px}
.theme .t-count{font-size:13px;font-weight:650;color:var(--accent2);letter-spacing:.05em;text-transform:uppercase}

/* about */
.about-grid{display:grid;grid-template-columns:360px 1fr;gap:26px;align-items:start}
@media(max-width:860px){.about-grid{grid-template-columns:1fr}}
.author-card{background:var(--hero-bg);color:var(--hero-ink);border-radius:var(--radius);padding:30px;position:relative;overflow:hidden}
.author-card::after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;background:rgba(56,182,207,.20);filter:blur(70px);top:-90px;right:-70px}
.avatar{width:76px;height:76px;border-radius:22px;background:linear-gradient(135deg,#0b5cad,#0e7490);display:flex;align-items:center;justify-content:center;font-family:var(--font-serif);font-size:30px;font-weight:700;color:#fff;position:relative;z-index:1;box-shadow:0 14px 30px -10px rgba(14,116,144,.6)}
.author-card h3{font-family:var(--font-serif);font-size:24px;margin:18px 0 3px;position:relative;z-index:1}
.author-card .role{color:#9fd8e8;font-size:14px;margin:0 0 20px;position:relative;z-index:1}
.author-card dl{margin:0;position:relative;z-index:1;display:grid;gap:13px}
.author-card dt{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--hero-ink2)}
.author-card dd{margin:2px 0 0;font-size:14.5px}
.author-card a{color:#7dd3fc}
.about-copy p{font-size:16.5px;color:var(--ink2);margin:0 0 16px}
.about-copy p:first-child{font-size:18px;color:var(--ink)}
.profile-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}

/* paper page */
.paper-hero{background:var(--hero-bg);color:var(--hero-ink);position:relative;overflow:hidden}
.paper-hero .glow{position:absolute;border-radius:50%;filter:blur(90px);width:480px;height:480px;background:rgba(11,92,173,.35);top:-200px;right:-100px}
.paper-hero-inner{position:relative;padding:56px 0 60px;display:grid;grid-template-columns:1fr 340px;gap:40px;align-items:center}
@media(max-width:860px){.paper-hero-inner{grid-template-columns:1fr}}
.paper-hero .cover-art{width:100%;height:auto;border-radius:16px;box-shadow:0 30px 60px -20px rgba(0,0,0,.6)}
.crumb{font-size:13.5px;color:var(--hero-ink2);margin:0 0 20px}
.crumb a{color:#9fd8e8;text-decoration:none}
.paper-hero h1{font-family:var(--font-serif);font-size:clamp(28px,4.4vw,42px);line-height:1.2;font-weight:600;margin:0 0 18px;letter-spacing:-.01em}
.paper-meta{display:flex;flex-wrap:wrap;gap:9px 20px;font-size:14px;color:var(--hero-ink2);align-items:center}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px 32px;margin-top:30px}
.panel h2{font-family:var(--font-serif);font-size:22px;margin:0 0 14px}
.panel p.abs-full{font-size:16.5px;line-height:1.75;color:var(--ink);margin:0}
.dl-row{display:flex;gap:11px;flex-wrap:wrap;margin-top:6px}
.dl-note{font-size:13.5px;color:var(--ink3);margin:14px 0 0}
.cite-box{background:var(--surface2);border:1px solid var(--line);border-radius:13px;padding:17px 19px;font-size:14px;line-height:1.6}
.cite-box pre{font-family:var(--font-mono);font-size:12.8px;white-space:pre-wrap;word-break:break-word;margin:12px 0 0}
.cite-tabs{display:flex;gap:8px;margin-bottom:13px}
.cite-tab{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--ink2);font:inherit;font-size:13px;font-weight:600;border-radius:999px;padding:6px 14px;cursor:pointer}
.cite-tab[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.copy-btn{margin-top:13px}
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:30px}
@media(max-width:680px){.prevnext{grid-template-columns:1fr}}
.pn{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 23px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow)}
.pn span{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink3);display:block;margin-bottom:7px}
.pn b{font-family:var(--font-serif);font-size:16.5px;line-height:1.4;display:block}
.pn:hover{border-color:var(--accent)}
.pn.next{text-align:right}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:760px){.related-grid{grid-template-columns:1fr}}

/* footer */
footer.site{margin-top:90px;background:var(--hero-bg);color:var(--hero-ink2)}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px;padding:56px 0 40px}
@media(max-width:760px){footer.site .cols{grid-template-columns:1fr}}
footer.site h4{color:var(--hero-ink);font-size:14px;letter-spacing:.08em;text-transform:uppercase;margin:0 0 15px}
footer.site a{color:var(--hero-ink2);text-decoration:none}
footer.site a:hover{color:#fff}
footer.site ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;font-size:14.5px}
footer.site .fine{border-top:1px solid rgba(255,255,255,.13);padding:22px 0 30px;font-size:13px;display:flex;flex-wrap:wrap;gap:8px 26px}
footer.site .fbrand{color:var(--hero-ink);font-family:var(--font-serif);font-size:19px;margin-bottom:10px}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}
@media print{.toolbar,header.site,.hero canvas.net,.hero-ctas,.icon-btn{display:none}.card,.panel{box-shadow:none}}