/* Lily Shen — personal site. Professional, quiet, warm. Serif headings, system sans body. */
:root{--ink:#1c2430;--sub:#5b6673;--accent:#2a4d73;--accent-ink:#1f3a57;--tint:#eef2f6;--bg:#fbfaf7;--card:#ffffff;--line:#e4e1da;--code:#f2efe9;--serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,"Times New Roman",serif;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
:root:not([data-theme="light"]){color-scheme:light dark}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--ink:#e9e6e0;--sub:#a9a59d;--accent:#9dbbd9;--accent-ink:#c3d6ea;--tint:#1f2630;--bg:#14181d;--card:#1a1f26;--line:#2b313a;--code:#1f252d}}
:root[data-theme="dark"]{--ink:#e9e6e0;--sub:#a9a59d;--accent:#9dbbd9;--accent-ink:#c3d6ea;--tint:#1f2630;--bg:#14181d;--card:#1a1f26;--line:#2b313a;--code:#1f252d}
*{box-sizing:border-box}
html{font-size:17px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;overflow-wrap:anywhere;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.65}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--accent-ink)}
.wrap{max-width:64rem;margin:0 auto;padding:0 1rem}
h1,h2,h3,.brand,
h1{font-size:2.1rem;line-height:1.2;margin:.4rem 0 .8rem}
h2{font-size:1.45rem;line-height:1.3;margin:2.4rem 0 .8rem;padding-top:.9rem;border-top:1px solid var(--line)}
h3{font-size:1.12rem;line-height:1.35;margin:1.3rem 0 .3rem}
p{margin:.6rem 0}
.byline,.meta{color:var(--sub);font-size:.92rem}
.intro{font-size:1.1rem;line-height:1.6;max-width:44rem}
.kicker{font-family:var(--sans);color:var(--sub);font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:.74rem;margin:0 0 .35rem}
/* header */
.site-header{background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.site-header .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.3rem 1rem;padding-top:.85rem;padding-bottom:.85rem}
.brand{font-size:1.25rem;text-decoration:none;color:var(--ink)}
.site-header nav{display:flex;flex-wrap:wrap;gap:.2rem 1.15rem}
.site-header nav a{text-decoration:none;color:var(--sub);font-size:.93rem;padding:.15rem 0;border-bottom:2px solid transparent}
.site-header nav a:hover{color:var(--ink)}
.site-header nav a.on{color:var(--ink);border-bottom-color:var(--accent)}
main{margin:0 auto;padding:1.4rem 1rem 3.5rem}
main.narrow{max-width:46rem}
main.wide{max-width:64rem}
/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:2.5rem;align-items:center;padding:1.6rem 0 .6rem}
.hero h1{font-size:2.9rem;margin:.1rem 0 .3rem}
.role{color:var(--sub);font-size:1rem;margin:0 0 .9rem}
.lede{font-size:1.14rem;line-height:1.6;max-width:38rem;margin:0}
.lede+.lede{margin-top:.6rem}
.headshot{width:220px;height:220px;border-radius:50%;object-fit:cover;justify-self:end;border:4px solid var(--card);box-shadow:0 2px 14px rgba(0,0,0,.10)}
.reach{margin:.9rem 0 0;font-size:1rem;color:var(--ink)}
.cta{margin:1rem 0 0;display:flex;flex-wrap:wrap;gap:.5rem .9rem;align-items:center}
.btn{display:inline-block;text-decoration:none;border-radius:999px;padding:.5rem 1.15rem;font-weight:600;font-size:.93rem;background:var(--accent);color:#fff;border:1px solid var(--accent)}
.btn:hover{background:var(--accent-ink);border-color:var(--accent-ink);color:#fff}
.btn.ghost{background:transparent;color:var(--accent)}
.btn.ghost:hover{background:var(--tint);color:var(--accent-ink)}
.cta .quiet{font-size:.93rem}
/* at a glance */
.proof{margin:1.6rem 0 .4rem;padding:1rem 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--sub);font-size:.98rem}



/* section header rows */
.row{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap}
.row h2{flex:1 1 auto}
.row .more{font-size:.9rem;white-space:nowrap}
/* book covers */
.card.has-cover{gap:.6rem}
.card .cover{display:block;width:150px;margin:.2rem 0 .4rem}
.card .cover img{width:150px;height:auto;border-radius:4px;box-shadow:0 2px 8px rgba(0,0,0,.18);display:block}
.card-body{display:flex;flex-direction:column;gap:.15rem;min-width:0}
.paper.book{display:flex;gap:1.3rem;align-items:flex-start}
.book-cover{width:130px;flex:0 0 130px;height:auto;border-radius:4px;box-shadow:0 2px 10px rgba(0,0,0,.18)}
@media (max-width:560px){.paper.book{flex-direction:column}}
/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:1rem;margin-top:.4rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem 1.1rem 1.05rem;display:flex;flex-direction:column;gap:.15rem}
.card h3{margin:.2rem 0 .1rem;font-size:1.06rem}
.card h3 a{text-decoration:none;color:var(--ink)}
.card h3 a:hover{color:var(--accent)}
.card .meta{margin:0;font-size:.84rem}
.card .who{color:var(--sub);font-size:.88rem;margin:0 0 .35rem}
.card .blurb{font-size:.93rem;margin:0;color:var(--ink)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:0 3rem}
ul.list{list-style:none;padding:0;margin:.4rem 0}
ul.list li{padding:.5rem 0;border-bottom:1px solid var(--line);font-size:.95rem;line-height:1.5}
ul.list li:last-child{border-bottom:0}
.date{color:var(--sub);font-size:.84rem;font-variant-numeric:tabular-nums;margin-right:.35rem;white-space:nowrap}
.note{background:var(--tint);border-radius:10px;padding:1rem 1.2rem;margin:2.2rem 0 0;font-size:.97rem}
.note p{margin:.3rem 0}
.email{font-family:var(--serif);font-style:italic}
details.faq,details.cite{margin:1.6rem 0 0;padding:.6rem 0;border-top:1px solid var(--line)}
details.faq summary,details.cite summary{cursor:pointer;font-weight:600;color:var(--sub)}
details.faq h3{font-size:1rem;margin:.9rem 0 .2rem}
details.faq p{margin:.3rem 0;color:var(--sub)}
details.cite p{font-size:.95rem;margin:.6rem 0 .3rem}
/* posts, papers */
.summary{font-size:1.08rem;color:var(--sub);border-left:3px solid var(--accent);padding-left:.9rem;margin:1rem 0 1.5rem}
.post-card{padding:1rem 0;border-bottom:1px solid var(--line)}
.post-card h2{margin:.2rem 0 .3rem;font-size:1.3rem;border:0;padding:0}
.post-card h2 a{text-decoration:none;color:var(--ink)}
.post-card h2 a:hover{color:var(--accent)}
.post-card p{margin:.3rem 0}
.post .body{font-size:1.02rem}
.post .body h2{font-size:1.4rem}
pre{background:var(--code);padding:.8rem 1rem;overflow-x:auto;font-size:.85rem;border-radius:6px;white-space:pre-wrap;word-break:break-word}
code{background:var(--code);padding:.1em .3em;border-radius:3px;font-size:.9em}
pre code{background:none;padding:0}
details summary{cursor:pointer;color:var(--sub)}
details{margin:.4rem 0}
table{border-collapse:collapse;width:100%;font-size:.93rem;margin:1rem 0}
th,td{border-bottom:1px solid var(--line);padding:.5rem .5rem;text-align:left;vertical-align:top}
th{color:var(--sub);font-weight:600;font-size:.85rem;letter-spacing:.03em;text-transform:uppercase}
blockquote{margin:1rem 0;padding:.2rem 1rem;border-left:3px solid var(--line);color:var(--sub)}
.paper{padding:1rem 0;border-bottom:1px solid var(--line)}
.paper h3{margin-top:.2rem}
.paper .abstract{font-size:.95rem}
.paper .links a,.links a{margin-right:.9rem}
ul.media li{margin:.35rem 0}
.cite p{font-size:.95rem}
footer.site-footer{border-top:1px solid var(--line);color:var(--sub);font-size:.86rem;padding:1.6rem 0 2.6rem;margin-top:1rem}
footer.site-footer p{margin:.35rem 0}
.tag{display:inline-block;font-size:.8rem;color:var(--sub);margin-right:.5rem}
.tag a{color:var(--sub)}
img{max-width:100%;height:auto}
@media (max-width:760px){html{font-size:16px}h1{font-size:1.7rem}.hero{grid-template-columns:1fr;gap:1.2rem}.headshot{width:150px;height:150px;justify-self:start;order:-1}.hero h1{font-size:2.2rem}.two-col{grid-template-columns:1fr}.site-header nav{gap:.1rem .8rem}.site-header nav a{font-size:.88rem}}
.post-image{margin:0 0 1.7rem}.post-image img{display:block;width:100%;height:auto;border-radius:8px}.post-image figcaption{font-size:.88rem;color:var(--sub);margin-top:.5rem}