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

:root {
  --primary: #1a1a2e;
  --accent: #0066cc;
  --accent-hover: #0052a3;
  --text: #333;
  --text-light: #666;
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --border: #e0e0e0;
  --max-width: 860px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

/* === Navbar === */
.navbar {
  background: var(--primary);
  padding: 0.8rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-brand:hover {
  color: #ddd;
}

.nav-links a {
  color: #ccc;
  margin-left: 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

/* === Content === */
.content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  flex: 1;
  width: 100%;
}

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

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

.profile-photo img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.profile-info h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.profile-info .subtitle {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 1rem;
}

.profile-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.profile-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-light);
  font-size: 0.9rem;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: all 0.2s;
}

.profile-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(0, 102, 204, 0.04);
}

.profile-links a i {
  font-size: 1rem;
}

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

.section h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.section h2::after {
  content: "";
  display: block;
}


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

.news-list li {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.news-date {
  font-weight: 600;
  color: var(--accent);
  margin-right: 0.3rem;
}

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

.pub-item {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
}

.pub-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--primary);
  margin-bottom: 0.2rem;
}

.pub-authors {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0.15rem;
}

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

.pub-venue {
  font-size: 0.88rem;
  font-style: italic;
  color: var(--text-light);
}

.pub-venue .badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-style: normal;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.4rem;
  vertical-align: middle;
}

/* === Experience === */
.exp-item {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
  border-left: 3px solid var(--border);
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.exp-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
}

.exp-header .date {
  font-size: 0.85rem;
  color: var(--text-light);
  white-space: nowrap;
}

.exp-role {
  font-size: 0.9rem;
  color: var(--text-light);
  font-style: italic;
  margin-bottom: 0.3rem;
}

.exp-item ul {
  margin-left: 1rem;
  font-size: 0.9rem;
  color: var(--text);
}

.exp-item ul li {
  margin-bottom: 0.2rem;
}

/* === Projects === */
.proj-item {
  margin-bottom: 1.5rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: box-shadow 0.2s;
}

.proj-item:hover {
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.proj-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.proj-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
}

.proj-header h3 a {
  color: var(--primary);
}

.proj-header h3 a:hover {
  color: var(--accent);
}

.proj-desc {
  font-size: 0.9rem;
  color: var(--text-light);
}


/* === Blog === */
.blog-list {
  list-style: none;
}

.blog-item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border);
}

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

.blog-item h3 {
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

.blog-item h3 a {
  color: var(--primary);
}

.blog-item h3 a:hover {
  color: var(--accent);
}

.blog-item time {
  font-size: 0.85rem;
  color: var(--text-light);
}

.blog-item p {
  font-size: 0.93rem;
  color: var(--text-light);
  margin-top: 0.3rem;
}

.post-tags .tag {
  display: inline-block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-right: 0.3rem;
}

/* === Post === */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.post-header time {
  font-size: 0.9rem;
  color: var(--text-light);
}

.post-content {
  line-height: 1.8;
}

.post-content h2 {
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 0.8rem;
  color: var(--primary);
}

.post-content h3 {
  font-size: 1.15rem;
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
  color: var(--primary);
}

.post-content p {
  margin-bottom: 1rem;
}

.post-content code {
  background: var(--bg-alt);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-content pre {
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 1rem 1.2rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 1rem;
  font-size: 0.88rem;
  line-height: 1.5;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.post-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 1rem 0;
}

.post-content blockquote {
  border-left: 4px solid var(--accent);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  background: var(--bg-alt);
  border-radius: 0 4px 4px 0;
}

.post-content ul, .post-content ol {
  margin: 0.5rem 0 1rem 1.5rem;
}

/* === Footer === */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

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

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

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

  .profile-info h1 {
    font-size: 1.6rem;
  }

  .exp-header {
    flex-direction: column;
    gap: 0;
  }

  .proj-header {
    flex-direction: column;
    gap: 0;
  }
}