/* ===== Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #1a1a2e;
  background-color: #fafafa;
  line-height: 1.7;
  padding: 0;
}

/* ===== Layout ===== */
.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

/* ===== Header / Profile ===== */
.profile {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.profile-photo {
  width: 180px;
  min-width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  filter: grayscale(0%);
  transition: filter 0.3s ease, transform 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.profile-photo:hover {
  filter: grayscale(0%);
  transform: scale(1.02);
}

.profile-info {
  flex: 1;
}

.profile-name {
  font-size: 2rem;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.profile-bio {
  font-size: 0.95rem;
  color: #3a3a5c;
  line-height: 1.75;
  margin-bottom: 1rem;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
  font-size: 0.9rem;
}

.profile-links a {
  color: #4a6fa5;
  text-decoration: none;
  transition: color 0.2s ease;
  position: relative;
}

.profile-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: #e07a3a;
  transition: width 0.2s ease;
}

.profile-links a:hover {
  color: #e07a3a;
}

.profile-links a:hover::after {
  width: 100%;
}

/* ===== Section Headings ===== */
.section-heading {
  font-size: 1.3rem;
  font-weight: 600;
  color: #1a1a2e;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid #e8e8f0;
  letter-spacing: -0.01em;
}

/* ===== Sections ===== */
section {
  margin-bottom: 2.5rem;
}

/* ===== News ===== */
.news-list {
  list-style: none;
  padding: 0;
}

.news-list li {
  padding: 0.5rem 0;
  font-size: 0.9rem;
  color: #3a3a5c;
  line-height: 1.6;
  border-bottom: 1px solid #f0f0f5;
  display: flex;
  gap: 0.75rem;
}

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

.news-date {
  color: #8888a0;
  font-size: 0.85rem;
  min-width: 5.5rem;
  font-variant-numeric: tabular-nums;
}

.news-list li a {
  color: #4a6fa5;
  text-decoration: none;
  transition: color 0.2s ease;
}

.news-list li a:hover {
  color: #e07a3a;
}

/* ===== Publications ===== */
.pub-list {
  list-style: none;
  padding: 0;
}

.pub-item {
  padding: 0.85rem 0;
  border-bottom: 1px solid #f0f0f5;
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: #1a1a2e;
  margin-bottom: 0.25rem;
  text-decoration: underline;
  text-decoration-color: #d0d0e0;
  text-underline-offset: 3px;
}

.pub-authors {
  font-size: 0.88rem;
  color: #5a5a7a;
  margin-bottom: 0.2rem;
}

.pub-venue {
  font-size: 0.88rem;
  color: #6a6a8a;
  font-style: italic;
  margin-bottom: 0.3rem;
}

.pub-links {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.pub-links a, .pub-links .bib-toggle {
  font-size: 0.8rem;
  color: #4a6fa5;
  text-decoration: none;
  padding: 0.15rem 0.5rem;
  border: 1px solid #d0d8e8;
  border-radius: 4px;
  transition: all 0.2s ease;
  cursor: pointer;
  background: none;
  font-family: inherit;
}

.pub-links a:hover, .pub-links .bib-toggle:hover {
  color: #e07a3a;
  border-color: #e07a3a;
}

.bib-content {
  display: none;
  margin-top: 0.5rem;
  padding: 0.75rem 1rem;
  background: #f5f5fa;
  border-radius: 6px;
  font-size: 0.78rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  white-space: pre-wrap;
  word-break: break-all;
  color: #3a3a5c;
  line-height: 1.5;
  border: 1px solid #e8e8f0;
}

.bib-content.show {
  display: block;
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 1.5rem 0;
  font-size: 0.8rem;
  color: #9999aa;
  border-top: 1px solid #e8e8f0;
}

.footer a {
  color: #9999aa;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: #e07a3a;
}

/* ===== Highlight own name ===== */
.self-author {
  font-weight: 600;
  color: #1a1a2e;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .profile {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-photo {
    width: 140px;
    min-width: 140px;
    height: 140px;
  }

  .profile-name {
    font-size: 1.6rem;
  }

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

  .news-list li {
    flex-direction: column;
    gap: 0.15rem;
  }

  .news-date {
    min-width: auto;
  }

  .container {
    padding: 2rem 1rem 1.5rem;
  }
}

/* ===== Subtle animation on load ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.profile, section {
  animation: fadeInUp 0.5s ease-out both;
}

section:nth-child(2) { animation-delay: 0.1s; }
section:nth-child(3) { animation-delay: 0.2s; }
section:nth-child(4) { animation-delay: 0.3s; }