/* ========================================
   Modern Academic Personal Page Styles
   ======================================== */

:root {
  --color-text: #1a1a1a;
  --color-text-muted: #555;
  --color-text-light: #777;
  --color-link: #0066cc;
  --color-link-hover: #004499;
  --color-bg: #fff;
  --color-highlight: #f8f9fa;
  --color-border: #e8e8e8;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 900px;
  --spacing-unit: 1rem;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 1.5);
}

/* ========================================
   Bio Section (Top)
   ======================================== */

.bio-section {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 2);
  margin-bottom: calc(var(--spacing-unit) * 3);
  align-items: flex-start;
}

.bio-photo {
  flex: 0 0 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.bio-photo > img {
  width: 180px;
  height: auto;
  border-radius: 4px;
}

.bio-photo .affiliations {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 0.75rem;
}

.bio-photo .affiliation-logo {
  height: 24px;
  width: auto;
  opacity: 0.75;
  transition: opacity 0.2s ease;
}

.bio-photo .affiliation-logo[alt="Meta Logo"] {
  height: 50px;
}

.bio-photo .affiliation-logo:hover {
  opacity: 1;
}

.bio-content {
  flex: 1;
  min-width: 280px;
}

.bio-content h1 {
  font-size: 1.8rem;
  font-weight: 600;
  margin: 0 0 0.25rem 0;
  letter-spacing: -0.02em;
}

.bio-content h2 {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin: 0 0 0.75rem 0;
}

.bio-content p {
  margin: 0 0 0.8rem 0;
  color: var(--color-text);
}

.contact-links {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
}

.contact-links a {
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s ease;
}

.contact-links a i {
  font-size: 1.1rem;
}

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

/* ========================================
   Publications Section
   ======================================== */

.publications-section {
  margin-top: calc(var(--spacing-unit) * 2);
}

.publications-section > h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 1.5rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
  letter-spacing: -0.01em;
}

/* Paper Row */
.paper-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

.paper-row:last-of-type {
  border-bottom: none;
}

.paper-row.highlight {
  background-color: var(--color-highlight);
  margin: 0 -1rem;
  padding: 1.25rem 1rem;
  border-radius: 6px;
  border-bottom: none;
}

.paper-thumbnail {
  flex: 0 0 200px;
}

.paper-thumbnail img {
  width: 200px;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s ease;
}

.paper-thumbnail a:hover img {
  transform: scale(1.02);
}

.paper-details {
  flex: 1;
  min-width: 250px;
}

.paper-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.4rem 0;
  line-height: 1.4;
}

.paper-authors {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 0 0.25rem 0;
}

.paper-authors a {
  color: var(--color-text-muted);
}

.paper-authors a:hover {
  color: var(--color-link);
}

.paper-authors strong {
  color: var(--color-text);
}

.paper-venue {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin: 0 0 0.4rem 0;
}

.paper-venue strong {
  color: var(--color-link);
}

.paper-links {
  font-size: 0.9rem;
  margin: 0 0 0.5rem 0;
}

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

.paper-abstract {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0.5rem 0 0 0;
  line-height: 1.6;
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
  margin-top: calc(var(--spacing-unit) * 3);
  padding-top: calc(var(--spacing-unit) * 1.5);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.site-footer p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin: 0;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 600px) {
  .container {
    padding: calc(var(--spacing-unit) * 2) var(--spacing-unit);
  }

  .bio-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .bio-photo {
    flex: 0 0 auto;
  }

  .bio-content {
    text-align: center;
  }

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

  .contact-links a {
    margin: 0 0.6rem;
  }

  .paper-row {
    flex-direction: column;
  }

  .paper-thumbnail {
    flex: 0 0 auto;
    width: 100%;
  }

  .paper-thumbnail img {
    width: 100%;
    max-width: 300px;
  }

  .paper-row.highlight {
    margin: 0 -0.5rem;
    padding: 1rem 0.5rem;
  }
}