:root{
  /* Light theme: classic academic structure, but with a distinct palette. */
  --text:#111111;
  --muted:#69717c;
  --line:#dfe5eb;
  --accent:#1769aa;
  --surface:#ffffff;
  --soft:#f5f8fb;
  --nav-text:#000000;
}

body{color:var(--text);background:var(--surface)}
.site-nav nav a{color:var(--nav-text)}
.brand{color:#000000}
.profile-column h1,
.section-heading h2,
.subsection-title,
.research-item h3,
.paper-item h3,
.experience-item h3,
#research .research-item h3,
#papers .paper-item h3{color:#111111}
.profile-role{color:#111111}
.profile-meta,
.item-meta,
#research .item-meta,
.subsection-note,
.experience-item>span{color:var(--muted)}
.about-copy p,
.research-item p,
.paper-item p,
#research .research-item p{color:var(--text)}
.experience-item p{color:#111111}
.experience-item .role{color:#111111}
#research .research-item,
#research .research-item:last-child{border-color:#dfe5eb;background:#ffffff}
#research .research-item,
#research .research-item:last-child{border-left-color:var(--accent)}
::selection{background:#dcecf9}

.theme-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
  margin-left:-4px;
  padding:0;
  border:1px solid #d2dae2;
  border-radius:50%;
  background:transparent;
  color:#000000;
  font-family:inherit;
  font-size:17px;
  line-height:1;
  cursor:pointer;
  transition:background-color .15s ease,border-color .15s ease,color .15s ease;
}
.theme-toggle:hover{
  background:#f0f5f9;
  border-color:#c1ccd6;
  color:#000000;
}
.theme-toggle:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}

html[data-theme="dark"]{
  color-scheme:dark;
  --text:#eceff3;
  --muted:#9eabb9;
  --line:#26364a;
  --accent:#79b8e8;
  --surface:#0b0d10;
  --soft:#101d2d;
}
html[data-theme="dark"] body{background:var(--surface);color:var(--text)}
html[data-theme="dark"] .site-nav{
  background:rgba(11,13,16,.97);
  border-bottom-color:#202b38;
  box-shadow:0 1px 8px rgba(0,0,0,.3);
}
html[data-theme="dark"] .brand,
html[data-theme="dark"] .profile-column h1,
html[data-theme="dark"] .section-heading h2,
html[data-theme="dark"] .subsection-title,
html[data-theme="dark"] .research-item h3,
html[data-theme="dark"] .paper-item h3,
html[data-theme="dark"] .experience-item h3,
html[data-theme="dark"] #research .research-item h3,
html[data-theme="dark"] #papers .paper-item h3{color:#f2f4f7}
html[data-theme="dark"] .site-nav nav a{color:#f2f4f7}
html[data-theme="dark"] .site-nav nav a:hover,
html[data-theme="dark"] .brand:hover{color:var(--accent)}
html[data-theme="dark"] .home-section{background:var(--surface);border-bottom-color:var(--line)}
html[data-theme="dark"] .home-section:nth-of-type(even){background:var(--soft)}
html[data-theme="dark"] .profile-role{color:#dfe4ea}
html[data-theme="dark"] .profile-meta,
html[data-theme="dark"] .item-meta,
html[data-theme="dark"] #research .item-meta,
html[data-theme="dark"] .subsection-note,
html[data-theme="dark"] .experience-item>span{color:var(--muted)}
html[data-theme="dark"] .about-copy,
html[data-theme="dark"] .about-copy p{color:#e5e9ee}
html[data-theme="dark"] .research-item p,
html[data-theme="dark"] .paper-item p,
html[data-theme="dark"] #research .research-item p{color:#dfe4ea}
html[data-theme="dark"] #research .research-item,
html[data-theme="dark"] #research .research-item:last-child{
  background:var(--surface);
  border-color:#29394d;
  border-left-color:var(--accent);
  box-shadow:0 1px 3px rgba(0,0,0,.3);
}
html[data-theme="dark"] .item-links a,
html[data-theme="dark"] #research .item-links a{
  background:transparent;
  color:var(--accent);
  border-color:transparent;
}
html[data-theme="dark"] .item-links a:hover,
html[data-theme="dark"] #research .item-links a:hover{
  background:transparent;
  color:var(--accent);
  text-decoration:underline;
}
html[data-theme="dark"] .experience-list,
html[data-theme="dark"] .experience-item{border-color:var(--line)}
html[data-theme="dark"] .experience-item p{color:#dce2e8}
html[data-theme="dark"] .experience-item .role{color:#eef1f4}
html[data-theme="dark"] footer{background:var(--surface);color:#929daa}
html[data-theme="dark"] .theme-toggle{
  color:#e8edf2;
  border-color:#35465b;
}
html[data-theme="dark"] .theme-toggle:hover{
  background:var(--soft);
  border-color:#4b6078;
  color:#ffffff;
}
html[data-theme="dark"] ::selection{background:#244b70}

@media(max-width:820px){
  .theme-toggle{margin-left:0}
}