/* ============================================================
   Wen Wen — academic site
   Design tokens
   ============================================================ */
:root{
  --ink:        #14213D;   /* deep navy — masthead, headings */
  --ink-soft:   #2B3B5C;
  --paper:      #FBFAF7;   /* page background */
  --paper-dim:  #F1EEE6;   /* card / section background */
  --rule:       #DDD8CB;   /* hairline rule color */
  --burnt:      #BF5700;   /* UT Austin burnt orange — institutional accent */
  --burnt-dim:  #E9DCCF;
  --teal:       #2D5C4B;   /* secondary accent for links & tags */
  --text:       #262420;
  --text-muted: #6B6558;

  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans:  "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

  --measure: 42rem;
  --wide: 66rem;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a{ color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover{ color: var(--burnt); }
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--burnt);
  outline-offset: 3px;
}

img{ max-width: 100%; display:block; }

.wrap{
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 1.75rem;
}

/* ---------------- Masthead / Nav ---------------- */
.masthead{
  background: var(--ink);
  color: #EDEAE0;
  position: relative;
  z-index: 100;
}
.masthead .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}
.brand{
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: .01em;
  color: #F6F3EA;
  text-decoration: none;
}
.brand:hover{ color: var(--burnt); }
.brand small{
  display:block;
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #B9AE93;
  margin-top: .18rem;
}
nav.primary ul{
  list-style:none;
  display:flex;
  gap: 1.75rem;
  margin:0; padding:0;
}
nav.primary a{
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #D8D3C4;
  text-decoration: none;
  padding: .3rem 0;
  border-bottom: 1px solid transparent;
}
nav.primary a:hover,
nav.primary a[aria-current="page"]{
  color: #F6F3EA;
  border-bottom-color: var(--burnt);
}
.nav-toggle{
  display:none;
  background:none;
  border: 1px solid #4A5A7A;
  color:#EDEAE0;
  border-radius: 4px;
  padding: .35rem .6rem;
  font-family: var(--mono);
  font-size: .75rem;
}

/* ---------------- Hero ---------------- */
.hero{
  background: var(--ink);
  color: #EDEAE0;
  border-top: 1px solid #263457;
  position: relative;
}
.hero .wrap{
  padding-top: 3.4rem;
  padding-bottom: 3.8rem;
  display:grid;
  grid-template-columns: 1.15fr auto;
  gap: 3rem;
  align-items:end;
}
.hero-eyebrow{
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--burnt);
  margin: 0 0 1rem;
}
.hero h1{
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1.02;
  margin: 0 0 .9rem;
  color: #FBFAF7;
}
.hero .role{
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  color: #CFC9B7;
  margin: 0 0 .3rem;
  max-width: 34ch;
}
.hero .org{
  font-size: .95rem;
  color: #A9A38F;
  margin: 0;
}
.hero-links{
  display:flex;
  flex-wrap:wrap;
  gap: .6rem 1.2rem;
  margin-top: 1.6rem;
  font-family: var(--mono);
  font-size: .82rem;
}
.hero-links a{ color: #E3DFCF; }
.hero-links a:hover{ color: var(--burnt); }

.portrait{
  width: 168px;
  height: 168px;
  border-radius: 4px;
  overflow:hidden;
  border: 1px solid #3A4A6E;
  box-shadow: 0 18px 40px -18px rgba(0,0,0,.6);
  justify-self:end;
}
.portrait img{ width:100%; height:100%; object-fit:cover; }

/* ---------------- Section shell ---------------- */
section{ padding: 4rem 0; }
section + section{ border-top: 1px solid var(--rule); }

.section-head{
  display:flex;
  align-items:baseline;
  gap: 1rem;
  margin-bottom: 1.9rem;
}
.section-head .tag{
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--burnt);
}
.section-head h2{
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 500;
  margin: 0;
  color: var(--ink);
}
.section-head .rule{
  flex:1;
  height:1px;
  background: var(--rule);
}

.prose{ max-width: var(--measure); }
.prose p{ margin: 0 0 1.15rem; color: var(--text); }
.prose p:last-child{ margin-bottom:0; }

/* ---------------- About / research-focus grid ---------------- */
.focus-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  margin-top: 2.2rem;
}
.focus-card{
  background: var(--paper-dim);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--burnt);
  padding: 1.3rem 1.3rem 1.45rem;
}
.focus-card h3{
  font-family: var(--serif);
  font-size: 1.05rem;
  margin: 0 0 .55rem;
  color: var(--ink);
}
.focus-card p{
  margin:0;
  font-size: .92rem;
  color: var(--text-muted);
}

/* ---------------- Timeline (appointments / education) ---------------- */
.timeline{ list-style:none; margin: 0; padding:0; max-width: var(--measure); }
.timeline li{
  display:grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 1rem;
  padding: .85rem 0;
  border-top: 1px solid var(--rule);
}
.timeline li:first-child{ border-top:none; }
.timeline .when{
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--text-muted);
  padding-top: .15rem;
}
.timeline .what strong{ color: var(--ink); }
.timeline .what span{
  display:block;
  font-size: .88rem;
  color: var(--text-muted);
}

/* ---------------- Publications ---------------- */
.pub-list{ list-style:none; margin:0; padding:0; }
.pub{
  display:grid;
  grid-template-columns: 0rem 1fr;
  gap: 1.4rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
}
.pub:first-child{ border-top: none; padding-top: 0; }

.pub-status{
  font-family: var(--mono);
  font-size: .62rem;
  line-height: 1.4;
  letter-spacing: .02em;
  text-transform: uppercase;
  padding: .5rem .6rem;
  border: 1px solid currentColor;
  text-align:center;
  align-self:start;
  white-space: normal;
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}
.pub-status.published{ color: var(--teal); }
.pub-status.forthcoming{ color: var(--burnt); }
.pub-status.rr{ color: #8A6D00; }
.pub-status.wp{ color: var(--text-muted); }

.pub h3{
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.12rem;
  line-height: 1.35;
  margin: 0 0 .4rem;
  color: var(--ink);
}
.pub .coauthors{
  font-size: .88rem;
  color: var(--text-muted);
  margin: 0 0 .3rem;
  font-style: italic;
}
.pub .venue{
  font-size: .88rem;
  color: var(--text);
  margin:0;
}
.pub .venue em{ color: var(--ink); font-style: normal; font-weight: 600; }

/* ---------------- Footer ---------------- */
footer{
  background: var(--ink);
  color: #A9A38F;
  padding: 2.2rem 0;
  font-size: .85rem;
}
footer .wrap{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap: .8rem;
}
footer a{ color: #D8D3C4; }
footer a:hover{ color: var(--burnt); }

/* ---------------- Responsive ---------------- */
@media (max-width: 760px){
  nav.primary{
    position:absolute;
    top: 100%; left:0; right:0;
    background: var(--ink);
    border-top: 1px solid #2A3A5C;
    display:none;
    z-index: 100;				 
  }
  nav.primary.open{ display:block; }
  nav.primary ul{ flex-direction:column; gap:0; padding: .5rem 1.75rem 1rem; }
  nav.primary a{ display:block; padding: .7rem 0; border-bottom: 1px solid #24345a; }
  .nav-toggle{ display:inline-block; }


  .hero .wrap{ grid-template-columns: 1fr; }
  .portrait{ justify-self:start; width:120px; height:120px; }

  .focus-grid{ grid-template-columns: 1fr; }
  .timeline li,
  .pub{ grid-template-columns: 1fr; gap:.4rem; }
  .pub-status{ justify-self:start; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
}