/* ---------- tokens (PaperMod neutrals, UT Austin burnt orange accent) ---------- */
:root {
  --bg: rgb(245, 245, 245);
  --entry: rgb(255, 255, 255);
  --primary: rgb(30, 30, 30);
  --secondary: rgb(108, 108, 108);
  --border: rgb(230, 230, 230);
  --ut: #bf5700;
  --accent: #b34f00;
  --hover: #d9782d;
  --accent-soft: #f6e0cf;
  --code-bg: rgb(235, 235, 235);
  --figure-bg: rgb(255, 255, 255);
  --todo-bg: #fff1a8;
  --todo-text: #5c4a00;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --measure: 68rem;
  --radius: 8px;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: rgb(29, 30, 32);
    --entry: rgb(46, 46, 51);
    --primary: rgb(218, 218, 219);
    --secondary: rgb(155, 156, 157);
    --border: rgb(58, 58, 62);
    --ut: #d9681a;
    --accent: #f0904a;
    --hover: #f6b07c;
    --accent-soft: rgb(84, 52, 30);
    --code-bg: rgb(46, 46, 51);
    --figure-bg: rgb(245, 245, 245);
    --todo-bg: #4d4000;
    --todo-text: #fff1a8;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  border-top: 3px solid var(--ut);
  background: var(--bg);
  color: var(--primary);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.site-header,
main,
.site-footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 1.25rem;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.15s ease-in-out, text-decoration-color 0.15s ease-in-out;
}
a:hover { color: var(--hover); text-decoration-color: currentColor; }

h1, h2, h3 { line-height: 1.3; font-weight: 700; }
h1 { font-size: 2rem; margin: 0 0 1rem; }
h2 { font-size: 1.5rem; margin: 0 0 1rem; }
main > section > h2::after {
  content: "";
  display: block;
  width: 2.25rem;
  height: 3px;
  margin-top: 0.4rem;
  border-radius: 2px;
  background: var(--ut);
}
::selection { background: var(--accent-soft); }
p, ul, ol { margin: 0 0 1rem; }
img { max-width: 100%; height: auto; }
strong { font-weight: 600; }
.muted { color: var(--secondary); }

/* Marks content that still needs real information. Remove before launch. */
.todo {
  background: var(--todo-bg);
  color: var(--todo-text);
  padding: 0.05em 0.35em;
  border-radius: 3px;
  font-size: 0.9em;
}

/* ---------- header / footer ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  padding-bottom: 2.75rem;
}
.site-title {
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
}
.header-right { display: flex; align-items: center; gap: 0.5rem; margin-left: auto; }
.site-header nav { display: flex; gap: 0.5rem; }
.site-header nav a {
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
}
.site-header nav a:hover,
.site-header nav a[aria-current="page"] {
  color: var(--primary);
  background: var(--entry);
  border-color: var(--border);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: none;
  color: var(--primary);
  cursor: pointer;
  transition: color 0.15s ease-in-out, background 0.15s ease-in-out, border-color 0.15s ease-in-out;
}
.theme-toggle:hover { color: var(--hover); background: var(--entry); border-color: var(--border); }
.theme-toggle svg { width: 1.15rem; height: 1.15rem; }
.theme-toggle .icon-sun,
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4rem;
  padding-top: 1.25rem;
  padding-bottom: 2.5rem;
  background: linear-gradient(var(--border), var(--border)) center top / calc(100% - 2.5rem) 1px no-repeat;
  color: var(--secondary);
  font-size: 0.85rem;
}
.site-footer a { display: inline-flex; color: var(--secondary); }
.site-footer a:hover { color: var(--hover); }
.site-footer svg { width: 1.1rem; height: 1.1rem; }

/* ---------- home ---------- */
.intro {
  display: grid;
  grid-template-columns: 280px minmax(0, 40rem);
  justify-content: center;
  gap: 3.5rem;
  align-items: center;
}
.intro-aside {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.2rem;
}
.portrait-frame {
  position: relative;
  isolation: isolate;
}
.portrait-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  transform: translate(14px, 14px);
  border: 2px solid var(--ut);
  border-radius: 16px;
  z-index: -1;
}
.portrait {
  width: 280px;
  height: 280px;
  display: block;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--entry);
}
.intro-main { text-align: center; align-self: center; }
.intro-name {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 0.6rem;
}
.intro-main p.intro-role {
  margin: 0 0 1.4rem;
  text-align: center;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.intro-main p {
  margin-bottom: 0.85rem;
  text-align: justify;
  hyphens: auto;
  -webkit-hyphens: auto;
}

.social-icons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.1rem;
  margin-top: 0.25rem;
}
.social-icons a {
  display: inline-flex;
  color: var(--primary);
}
.social-icons a:hover { color: var(--hover); }
.social-icons svg { width: 1.45rem; height: 1.45rem; }

section + section,
.intro + section { margin-top: 3.5rem; }

/* ---------- publications ---------- */
.pubs {
  list-style: none;
  padding: 0;
  margin: 0;
}
.pub {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--border);
}
.pub:first-child { padding-top: 0.25rem; }
.pub:last-child { border-bottom: 0; }
.pub-body > span:not(.pub-links) { display: block; }
.pub-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.3rem;
}
.pub-authors { font-size: 1rem; line-height: 1.5; }
.pub-authors .me {
  color: var(--accent);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--accent-soft);
  text-underline-offset: 0.2em;
}
.pub-venue {
  font-size: 0.95rem;
  font-style: italic;
  margin-top: 0.15rem;
}

.badge {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.05rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-style: normal;
  font-weight: 700;
  vertical-align: 0.1em;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.4rem;
}
.pub-links a {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.pub-links a::after { content: " ↗"; font-weight: 400; }
.pub-links a:hover { color: var(--hover); text-decoration: underline; }

/* ---------- research ---------- */
.lede { color: var(--secondary); margin-bottom: 3rem; }

.project { margin-bottom: 3.5rem; }
.project h2 { font-size: 1.25rem; margin-bottom: 0.15rem; }
.project .subtitle { margin-bottom: 0.15rem; }
.project .context { color: var(--secondary); font-size: 0.9rem; margin-bottom: 1.25rem; }
.project-links .pub-links { margin-top: 0; }

figure {
  margin: 0 0 1.25rem;
  padding: 1.25rem;
  background: var(--figure-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}
figure img { max-height: 260px; width: auto; display: inline-block; }

/* ---------- posts ---------- */
.post-header { margin-bottom: 2rem; }
.post-header h1 { margin-bottom: 0.25rem; }
.meta { color: var(--secondary); font-size: 0.92rem; }

.post { font-size: 1.0625rem; line-height: 1.7; }
.post h2 { font-size: 1.35rem; margin: 2.25rem 0 0.75rem; }
.post h3 { font-size: 1.1rem; margin: 1.75rem 0 0.5rem; }
.post ul, .post ol { padding-left: 1.25rem; }
.post li { margin-bottom: 0.25rem; }
.post img {
  display: block;
  margin: 1.5rem auto;
  background: var(--figure-bg);
  border-radius: var(--radius);
}

.post-list { list-style: none; padding: 0; }
.post-list li {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 1rem;
  margin-bottom: 0.55rem;
}
.post-list time { color: var(--secondary); font-variant-numeric: tabular-nums; font-size: 0.92rem; }

blockquote {
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--border);
  color: var(--secondary);
}

code, pre { font-family: var(--mono); font-size: 0.85em; }
:not(pre) > code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
pre {
  background: var(--entry);
  border: 1px solid var(--border);
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  overflow-x: auto;
  line-height: 1.5;
  margin: 1.5rem 0;
}
.highlight .c, .highlight .c1, .highlight .cm { color: var(--secondary); font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn { color: var(--accent); }
.highlight .s, .highlight .s1, .highlight .s2 { color: #3f7d4e; }

.back { margin-top: 3rem; font-size: 0.94rem; }

/* ---------- small screens ---------- */
@media (max-width: 36rem) {
  .site-header { padding-top: 1.25rem; padding-bottom: 2rem; }
  .site-header nav { gap: 0.15rem; }
  .site-header nav a { padding: 0.3rem 0.5rem; }
  .intro { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .intro-aside { display: contents; }
  .portrait-frame { justify-self: center; order: 1; margin-bottom: 0.6rem; }
  .portrait-frame::before { transform: translate(10px, 10px); }
  .intro-main { order: 2; }
  .intro .social-icons { order: 3; margin-top: -0.25rem; }
  .portrait { width: 220px; height: 220px; }
  .intro-name { font-size: 2.5rem; margin-bottom: 0.5rem; }
  .intro-main p { text-align: left; hyphens: manual; -webkit-hyphens: manual; }
  .post-list li { grid-template-columns: 1fr; gap: 0; margin-bottom: 0.9rem; }
}