/* sophia-zhang.com — hand-written, no frameworks. */
:root{
  --green:#154734;      /* Baylor green */
  --green-2:#1e5e45;
  --gold:#b7952f;
  --ink:#1c1e1c;
  --body:#33383a;
  --muted:#6b7280;
  --line:#e6e3da;
  --bg:#ffffff;
  --bg-soft:#f7f6f1;
  --max:1080px;
  --serif:Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--body);
  background:var(--bg);line-height:1.65;font-size:17px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{font-family:var(--serif);color:var(--ink);line-height:1.2;font-weight:600}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---- nav ---- */
.nav{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(150%) blur(8px);border-bottom:1px solid var(--line);
}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;
  min-height:64px;gap:16px}
.brand{font-family:var(--serif);font-weight:600;font-size:1.15rem;color:var(--green);
  letter-spacing:.2px}
.brand:hover{text-decoration:none}
.nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0;flex-wrap:wrap}
.nav a{color:var(--body);font-size:.95rem;font-weight:500}
.nav a:hover{color:var(--green);text-decoration:none}
.nav .cv-link{color:var(--green);border:1px solid var(--green);border-radius:6px;
  padding:5px 12px}
.nav .cv-link:hover{background:var(--green);color:#fff}
.menu-btn{display:none;background:none;border:0;font-size:1.5rem;color:var(--green);
  cursor:pointer}

/* ---- hero ---- */
.hero{background:linear-gradient(160deg,#f4f6f3 0%,#eef1ec 100%);
  border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:210px 1fr;gap:40px;
  align-items:center;padding:56px 24px}
.hero-photo img{width:210px;height:210px;border-radius:50%;object-fit:cover;
  box-shadow:0 8px 30px rgba(21,71,52,.18);border:4px solid #fff}
.hero h1{font-size:2.5rem;margin:0 0 6px}
.hero .role{font-size:1.15rem;color:var(--green);font-weight:600;margin:0}
.hero .aff{color:var(--muted);margin:2px 0 18px}
.hero .lead{max-width:56ch;margin:0 0 22px}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;background:var(--green);color:#fff;padding:10px 20px;
  border-radius:8px;font-weight:600;font-size:.95rem;border:1px solid var(--green)}
.btn:hover{background:var(--green-2);text-decoration:none}
.btn.ghost{background:transparent;color:var(--green)}
.btn.ghost:hover{background:var(--green);color:#fff}

/* ---- sections ---- */
section.block{padding:64px 0;border-bottom:1px solid var(--line)}
section.block.soft{background:var(--bg-soft)}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;
  color:var(--gold);font-weight:700;margin:0 0 8px}
.block h2{font-size:1.9rem;margin:0 0 24px}
.about p{max-width:70ch;margin:0 0 16px}
.ri{max-width:72ch;font-style:italic;color:var(--body);border-left:3px solid var(--gold);
  padding-left:18px}

/* research streams */
.streams{display:grid;gap:26px}
.stream{display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.stream-img{height:100%}
.stream-img img{width:220px;height:190px;object-fit:cover}
.stream-body{padding:22px 24px 22px 0}
.stream-body h3{margin:0 0 8px;font-size:1.3rem;color:var(--green)}
.stream-body p{margin:0;color:var(--body)}

/* education / lists */
.edu{list-style:none;margin:0;padding:0}
.edu li{display:grid;grid-template-columns:1fr auto;gap:2px 16px;
  padding:14px 0;border-bottom:1px solid var(--line)}
.edu li:last-child{border-bottom:0}
.edu-org{font-weight:600;color:var(--ink)}
.edu-role{color:var(--body)}
.edu-meta{color:var(--muted);font-size:.92rem;text-align:right}

/* courses */
.courses{display:grid;gap:22px}
.course{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 24px}
.course h3{margin:0 0 4px;font-size:1.2rem;color:var(--green)}
.course-inst{margin:0 0 10px;color:var(--gold);font-weight:600;font-size:.9rem;
  text-transform:uppercase;letter-spacing:.06em}
.course p{margin:0}

/* two-col */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.awards{list-style:none;margin:0;padding:0}
.awards li{padding:9px 0 9px 22px;position:relative;border-bottom:1px dashed var(--line)}
.awards li:before{content:"";position:absolute;left:0;top:16px;width:8px;height:8px;
  background:var(--gold);border-radius:50%}
.plain{list-style:none;margin:0;padding:0}
.plain li{padding:6px 0;border-bottom:1px solid var(--line)}

/* service */
.service{display:grid;grid-template-columns:1fr 1fr;gap:8px 40px}
.svc-group{break-inside:avoid;margin-bottom:14px}
.svc-group h3{font-size:1.02rem;color:var(--green);margin:6px 0 6px;
  font-family:var(--sans);font-weight:700;text-transform:uppercase;
  letter-spacing:.05em}
.svc-group ul{margin:0;padding-left:18px}
.svc-group li{padding:2px 0;font-size:.95rem}

/* contact */
.contact{text-align:center}
.quote{font-family:var(--serif);font-size:1.5rem;color:var(--green);font-style:italic;
  max-width:34ch;margin:0 auto 6px}
.quote-author{color:var(--muted);margin:0 0 26px}
.contact-form{max-width:480px;margin:0 auto;display:grid;gap:12px;text-align:left}
.contact-form input,.contact-form textarea{padding:11px 14px;border:1px solid var(--line);
  border-radius:8px;font:inherit;font-size:.95rem}
.contact-links{margin-top:20px;display:flex;gap:18px;justify-content:center;
  color:var(--muted);flex-wrap:wrap}

/* footer */
footer{background:var(--green);color:#e9efe9;padding:30px 0;text-align:center;
  font-size:.9rem}
footer a{color:#fff}

/* publications page */
.pub-hero{padding:48px 0 12px}
.pub-hero h1{font-size:2.2rem;margin:0 0 6px}
.pub-hero .cv-note{color:var(--muted)}
.pubgroup{padding:26px 0;border-bottom:1px solid var(--line)}
.pubgroup h3{font-size:1.35rem;color:var(--green);margin:0 0 14px}
.pubgroup .count{display:inline-block;font-family:var(--sans);font-size:.8rem;
  background:var(--bg-soft);color:var(--muted);border:1px solid var(--line);
  border-radius:20px;padding:1px 10px;vertical-align:middle;font-weight:600}
.publist{margin:0;padding-left:26px}
.pub{margin:0 0 16px;padding-left:6px}
.pub-cite{margin:0}
.pub-note{margin:8px 0 0;color:var(--muted);font-size:.94rem}

/* responsive */
@media(max-width:820px){
  .nav ul{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;border-bottom:1px solid var(--line);padding:8px 0}
  .nav ul.open{display:flex}
  .nav ul li{padding:0 24px}
  .nav ul li a{display:block;padding:12px 0;border-bottom:1px solid var(--line)}
  .nav .cv-link{border:0;padding:12px 0}
  .menu-btn{display:block}
  .hero .wrap{grid-template-columns:1fr;text-align:center;gap:22px;padding:40px 24px}
  .hero-photo img{margin:0 auto}
  .hero .lead{margin-left:auto;margin-right:auto}
  .actions{justify-content:center}
  .cols,.service{grid-template-columns:1fr;gap:24px}
  .stream{grid-template-columns:1fr}
  .stream-img img{width:100%;height:200px}
  .stream-body{padding:0 22px 22px}
}