:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --text: #1a1a1a;
  --muted: #6a6a6a;
  --heading: #0d2a4a;
  --link: #2255aa;
  --link-hover: #cc3333;
  --rule: #d5d5d5;
  --card-bg: #f7f7f9;
  --card-border: #e6e6ea;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background: #ffffff;
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 24px 64px;
}

a {
  color: var(--link);
  text-decoration: none;
}
a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

h1 {
  font-size: 28px;
  font-weight: 600;
  color: var(--heading);
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--heading);
  margin: 40px 0 16px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}

h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--heading);
  margin: 0 0 8px;
}

p { margin: 0 0 12px; }

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--card-bg);
  padding: 2px 6px;
  border-radius: 3px;
}

/* ---------- Header ---------- */

.page-header {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.profile {
  flex: 0 0 auto;
}

.profile-photo,
.initials-avatar {
  width: 200px;
  height: 200px;
  border-radius: 8px;
  object-fit: cover;
  display: block;
}

.initials-avatar {
  background: var(--heading);
  color: #ffffff;
  font-size: 64px;
  font-weight: 600;
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.intro {
  flex: 1 1 320px;
  min-width: 0;
}

.intro .role {
  font-size: 18px;
  color: var(--text);
  margin: 4px 0 2px;
}

.intro .affiliation {
  color: var(--muted);
  margin: 2px 0 14px;
}

.intro .links {
  font-size: 15px;
}

.intro .links a {
  white-space: nowrap;
}

/* ---------- Sections ---------- */

section { margin-bottom: 8px; }

.section-note {
  color: var(--muted);
  font-size: 14px;
  margin: -8px 0 12px;
}

/* ---------- News ---------- */

table.news,
table.timeline {
  width: 100%;
  border-collapse: collapse;
}

table.news td,
table.timeline td {
  padding: 6px 12px 6px 0;
  vertical-align: top;
}

table.news td.date,
table.timeline td.date {
  width: 150px;
  white-space: nowrap;
  color: var(--muted);
  font-size: 14px;
  padding-right: 16px;
}

details.older-news {
  margin-top: 12px;
}
details.older-news summary {
  cursor: pointer;
  color: var(--link);
  font-size: 14px;
  margin-bottom: 8px;
}
details.older-news[open] summary { color: var(--link-hover); }

/* ---------- Publications ---------- */

table.publications {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 16px;
}

table.publications td {
  vertical-align: top;
  padding: 0 0 0 0;
}

table.publications td.thumb {
  width: 200px;
  padding-right: 16px;
}

.paper-thumb,
.paper-thumb-img {
  width: 180px;
  height: 100px;
  border-radius: 6px;
  display: block;
}

.paper-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 16px;
  line-height: 1.15;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.paper-thumb-img {
  object-fit: cover;
  object-position: top center;
  border: 1px solid var(--card-border);
  background: #ffffff;
}

.paper-thumb-img--fit {
  object-fit: contain;
  object-position: center;
  padding: 4px;
}

.thumb-cvpr     { background: linear-gradient(135deg, #c93a3a, #6a1414); }
.thumb-fg       { background: linear-gradient(135deg, #2a72c8, #163e72); }
.thumb-ijcb     { background: linear-gradient(135deg, #1f8c8c, #0f4848); }
.thumb-siggraph { background: linear-gradient(135deg, #7d4ad1, #3d216b); }
.thumb-springer { background: linear-gradient(135deg, #2e9050, #134523); }
.thumb-thesis   { background: linear-gradient(135deg, #555555, #1f1f1f); }

.paper-buttons {
  margin-top: 6px;
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.paper-buttons a { white-space: nowrap; }

details.bib {
  display: inline-block;
}
details.bib > summary {
  cursor: pointer;
  color: var(--link);
  list-style: none;
}
details.bib > summary::-webkit-details-marker { display: none; }
details.bib > summary:hover { color: var(--link-hover); }
details.bib[open] > summary { color: var(--link-hover); }

details.bib pre {
  margin: 8px 0 0;
  padding: 12px 14px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
  color: var(--text);
}

/* ---------- Patents ---------- */

ul.patents {
  list-style: none;
  padding: 0;
  margin: 0;
}

ul.patents li {
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}

ul.patents li:last-child { border-bottom: none; }

ul.patents .meta {
  color: var(--muted);
  font-size: 13px;
  display: inline-block;
  margin-left: 4px;
  margin-right: 4px;
}

/* ---------- Projects grid ---------- */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 4px;
}

.project-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: #ffffff;
  overflow: hidden;
  transition: transform 120ms ease, box-shadow 120ms ease;
  color: inherit;
}
.project-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
  text-decoration: none;
}

.project-banner {
  height: 70px;
  width: 100%;
}
.banner-purple { background: linear-gradient(135deg, #b76bf5, #6a3ad6); }
.banner-blue   { background: linear-gradient(135deg, #4ea7ee, #1f4fa8); }
.banner-orange { background: linear-gradient(135deg, #ff9f43, #d24e1c); }

.project-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1 1 auto;
}

.project-body h3 {
  margin: 0;
  font-size: 16px;
}

.project-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

.project-badge {
  margin-top: auto !important;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ---------- Awards ---------- */

ul.awards {
  margin: 0 0 12px;
  padding-left: 20px;
}

ul.awards li {
  margin-bottom: 4px;
}

/* ---------- Footer ---------- */

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

footer a { color: var(--muted); }
footer a:hover { color: var(--link-hover); }

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  body {
    padding: 24px 16px 48px;
  }

  .page-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
  }

  .profile-photo,
  .initials-avatar {
    width: 160px;
    height: 160px;
  }

  .intro .links a {
    display: inline-block;
  }

  table.news td.date,
  table.timeline td.date {
    width: 100px;
    font-size: 13px;
  }

  table.publications td.thumb {
    width: 156px;
    padding-right: 12px;
  }

  .paper-thumb,
  .paper-thumb-img {
    width: 140px;
    height: 78px;
  }

  .paper-thumb {
    font-size: 13px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}