/* ======= Base Styles ======= */
html {
    scrollbar-gutter: stable; /* prevents nav bar jump due to scrollbar */
  }
  
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.45;
    color: #222;
    max-width: 760px;
    margin: 24px auto;
    padding: 0 20px;
    background: #f9f9f9;
  }
  
  /* ======= Top Navigation ======= */
  .top-nav {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 4px 0 16px;
  }
  .top-nav a {
    color: #555;
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 4px;
  }
  .top-nav a:hover { text-decoration: underline; }
  .top-nav a.active { background: #f0f0f0; color: #0645ad; }
  
  /* ======= Headings ======= */
  h1 {
    font-size: 1.6em;
    font-weight: 600;
    margin: 0 0 0.5em;
    color: #222;
  }
  h2 {
    font-size: 1.2em;
    font-weight: 600;
    margin: 1.2em 0 0.6em;
    color: #222;
  }
  h3 {
    font-size: 1.05em;
    font-weight: 600;
    margin: 0.8em 0 0.4em;
    color: #222;
  }
  
  /* ======= Home Page ======= */
  .profile-header {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 1.8em;
  }
  
  .profile-img {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #e0e0e0;
  }
  
  .profile-info h1 {
    font-size: 1.6em;
    font-weight: 600;
    margin: 0 0 0.3em;
    color: #222;
  }
  
  .social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6em;
  }
  
  .social-links a, .social-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    padding: 0.4em 0.8em;
    background: #f0f0f0;
    border-radius: 4px;
    color: #555;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.2s;
  }
  .social-links a:hover, .social-btn:hover {
    background: #e0e0e0;
    color: #0066cc;
  }
  
  /* ======= Section Headers ======= */
  .section-header {
    font-size: 1.2em;
    font-weight: 600;
    color: #222;
    margin: 1.2em 0 0.6em;
    display: block;
  }
  
  /* ======= Content Items ======= */
  .publication, .software, .news-item {
    margin-bottom: 1em;
    padding-left: 10px;
    border-left: 3px solid #eee;
  }
  
  .news-item h3 {
    color: #666;
    font-size: 0.9em;
    margin: 1.2em 0 0.3em;
    font-weight: normal;
  }
  
  /* ======= Blog List ======= */
  .blog-post {
    margin-bottom: 2em;
    padding-bottom: 1.2em;
    border-bottom: 1px solid #eee;
  }
  .blog-post h2 {
    font-size: 1.2em;
    font-weight: 600;
    margin: 0 0 0.25em;
  }
  .post-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 0.6em;
  }
  .post-date {
    color: #666;
    font-size: 0.9em;
  }
  .post-excerpt {
    color: #333;
    line-height: 1.55;
    margin: 0.5em 0;
  }
  .post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 0.8em;
  }
  .tag {
    background: #f0f0f0;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 0.78em;
    color: #555;
  }
  .tag i { margin-right: 3px; }
  
  /* ======= Tag Filtering ======= */
  #active-tags-container {
    margin: 1.8em 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
  }
  #active-tags-container.hidden { display: none; }
  #active-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .tag.clickable-tag { cursor: pointer; transition: all 0.2s; }
  .tag.clickable-tag:hover {
    background: #e0e0e0;
    color: #0066cc;
  }
  .tag.active-tag {
    background: #0066cc;
    color: white;
    cursor: pointer;
  }
  .tag.clear-all {
    background: #f0f0f0;
    color: #555;
    cursor: pointer;
    margin-right: 8px;
  }
  .tag.clear-all:hover { background: #e0e0e0; }
  
  /* ======= Single Blog Posts ======= */
  .blog-content h1 { font-size: 1.6em; margin: 0 0 0.6em; }
  .blog-content h2 { font-size: 1.2em; margin: 1.2em 0 0.6em; }
  
  /* ======= Publications Page ======= */
  table { width: 100%; border-collapse: collapse; }
  td { vertical-align: top; padding: 2px 0; }
  td.year { width: 56px; color: #444; white-space: nowrap; }
  td.cite { padding-left: 8px; }
  a { color: #0645ad; text-decoration: none; }
  a:hover { text-decoration: underline; }
  
  /* ======= Footer ======= */
  footer {
    text-align: center;
    margin: 3em 0 1.5em;
    padding: 1em 0;
    border-top: 1px solid #ddd;
    color: #666;
    font-size: 0.9em;
  }
  
  /* ======= Email Dialog (Home) ======= */
  #email-dialog::backdrop { background: rgba(0,0,0,.45); }
  #email-dialog {
    padding: 0;
    border: none;
    background: transparent;
    inset: 0;
  }
  #email-dialog:not([open]) { display: none; }
  #email-dialog[open] {
    display: grid;
    place-items: center;
  }
  .email-dialog-content {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
    max-width: 420px;
    width: 92vw;
    padding: 1rem 1rem 0.8rem;
  }
  .email-copy-row {
    display: flex;
    gap: 8px;
    align-items: center;
  }
  #email-address {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.95em;
    color: #333;
    background: #fafafa;
  }
  .copy-btn, .close-btn {
    padding: 8px 12px;
    border: 1px solid #ccc;
    background: #f0f0f0;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    color: #555;
    transition: all 0.2s;
  }
  .copy-btn:hover, .close-btn:hover {
    background: #e0e0e0;
    color: #0066cc;
  }
  
  /* ======= Responsive Design ======= */
  @media (max-width: 600px) {
    .profile-header {
      flex-direction: column;
      text-align: center;
      gap: 1.5em;
    }
    .social-links { justify-content: center; }
    .profile-img {
      width: 80px;
      height: 80px;
    }
    .post-header {
      flex-direction: column;
      align-items: flex-start;
      gap: 0.3em;
    }
    body { padding: 0 15px; }
    #active-tags-container, #active-tags { gap: 6px; }
  }