:root {
  --color-bg: #ffffff;
  --color-text: #2d2d2d;
  --color-text-secondary: #555;
  --color-text-muted: #888;
  --color-link: #2563eb;
  --color-link-hover: #1d4ed8;
  --color-border: #e5e7eb;
  --color-badge-red: #b33a3a;
  --color-badge-dark: #444;
  --color-badge-teal: #1a7a6d;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1100px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

/* Hero */

.hero {
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo img {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  object-fit: cover;
}

.bio p {
  margin-bottom: 0.9rem;
  font-size: 0.95rem;
}

.contact-links {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  font-size: 0.93rem;
}

.contact-links a {
  color: var(--color-text-secondary);
}

.contact-links a:hover {
  color: var(--color-link);
}

.contact-links .sep {
  color: var(--color-text-muted);
  user-select: none;
}

/* Section headers */

section {
  margin-bottom: 2.5rem;
}

section > h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-border);
}

/* Updates / News */

.news-list {
  list-style: none;
}

.news-list li {
  display: flex;
  gap: 1.5rem;
  padding: 0.55rem 0;
  font-size: 0.93rem;
  border-bottom: 1px solid var(--color-border);
}

.news-list li:last-child {
  border-bottom: none;
}

.news-date {
  flex-shrink: 0;
  width: 120px;
  font-weight: 700;
  color: var(--color-text);
  font-size: 0.9rem;
}

.news-content {
  flex: 1;
  color: var(--color-text-secondary);
}

.news-content a {
  color: var(--color-badge-red);
}

/* Education */

.edu-item {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.edu-item img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  flex-shrink: 0;
}

.edu-details h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.edu-details p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.1rem;
}

/* Work Experience */

.work-item {
  margin-bottom: 1.8rem;
}

.work-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.3rem;
}

.work-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.work-header .work-date {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.work-role {
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.4rem;
}

.work-item ul {
  list-style: disc;
  padding-left: 1.3rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.work-item ul li {
  margin-bottom: 0.3rem;
}

/* Publications */

.pub-year-group {
  position: relative;
  margin-bottom: 2rem;
}

.pub-year {
  font-size: 2rem;
  font-weight: 700;
  color: #ddd;
  text-align: right;
  position: absolute;
  right: 0;
  top: -0.3rem;
}

.pub-year-group > hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-bottom: 1.2rem;
}

.pub-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.pub-badge {
  flex-shrink: 0;
  width: 76px;
  text-align: center;
  padding-top: 0.15rem;
}

.pub-badge span {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.badge-iclr { background: var(--color-badge-red); }
.badge-icml { background: var(--color-badge-red); }
.badge-neurips { background: var(--color-badge-red); }
.badge-corl { background: var(--color-badge-teal); }
.badge-arxiv { background: var(--color-badge-dark); }
.badge-journal { background: var(--color-badge-dark); }

.pub-details {
  flex: 1;
}

.pub-title {
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.2rem;
}

.pub-authors {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.15rem;
}

.pub-venue {
  font-size: 0.88rem;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.pub-links a {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  margin-right: 0.3rem;
  text-decoration: none;
}

.pub-links a:hover {
  border-color: var(--color-link);
  color: var(--color-link);
  text-decoration: none;
}

/* Teaching */

.teaching-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.8rem;
  align-items: flex-start;
}

.teaching-item img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  flex-shrink: 0;
}

.teaching-details h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.1rem;
}

.teaching-details .teaching-date {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.teaching-details ul {
  list-style: disc;
  padding-left: 1.3rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.teaching-details ul li {
  margin-bottom: 0.25rem;
}

/* Community */

.community-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.community-item img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  flex-shrink: 0;
}

.community-details h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.1rem;
}

.community-details .comm-date {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.community-details ul {
  list-style: disc;
  padding-left: 1.3rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* Honors */

.honors-list {
  list-style: disc;
  padding-left: 1.3rem;
  font-size: 0.93rem;
  color: var(--color-text-secondary);
}

.honors-list li {
  margin-bottom: 0.4rem;
}

/* Areas of Experience */

.areas-text {
  font-size: 0.93rem;
  color: var(--color-text-secondary);
}

/* Responsive */

@media (max-width: 640px) {
  .hero {
    flex-direction: column-reverse;
    align-items: center;
    text-align: center;
  }

  .hero-photo img {
    width: 140px;
    height: 140px;
  }

  .contact-links {
    justify-content: center;
  }

  .news-list li {
    flex-direction: column;
    gap: 0.2rem;
  }

  .news-date {
    width: auto;
  }

  .pub-year {
    position: static;
    text-align: left;
    margin-bottom: 0.5rem;
  }

  .pub-item {
    flex-direction: column;
    gap: 0.5rem;
  }

  .pub-badge {
    width: auto;
    text-align: left;
  }

  .edu-item,
  .teaching-item,
  .community-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
  }

  .work-header {
    flex-direction: column;
  }
}