:root {
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --secondary-text: #666666;
  --accent-color: #007bff;
  --section-bg: #f8f9fa;
  --border-color: #eeeeee;
  --max-width: 900px;
}

/* Explicit dark theme */
[data-theme='dark'] {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --secondary-text: #a0a0a0;
  --accent-color: #3793ff;
  --section-bg: #1e1e1e;
  --border-color: #333333;
}

/* System preference fallback (only if no explicit theme set) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --secondary-text: #a0a0a0;
    --accent-color: #3793ff;
    --section-bg: #1e1e1e;
    --border-color: #333333;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s, color 0.3s;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 20px;
}

/* Theme Toggle */
.theme-toggle-container {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 20px;
}

#theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 8px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

#theme-toggle:hover {
  background: var(--section-bg);
}

#theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* Toggle icon visibility */
.sun-icon { display: none; }
.moon-icon { display: block; }

[data-theme='dark'] .sun-icon { display: block; }
[data-theme='dark'] .moon-icon { display: none; }

/* If system is dark and no preference set */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) .sun-icon { display: block; }
  :root:not([data-theme='light']) .moon-icon { display: none; }
}

header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px 40px;
  margin-bottom: 50px;
  align-items: center;
}

.profile-img {
  grid-row: 1;
  grid-column: 1;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--border-color);
}

.header-info {
  grid-row: 1;
  grid-column: 2;
}

.header-info h1 {
  margin: 0 0 10px 0;
  font-size: 2.5rem;
  font-weight: 800;
}

.header-info .title {
  font-size: 1.1rem;
  color: var(--secondary-text);
  margin-bottom: 15px;
}

.links {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.links a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.links a:hover {
  text-decoration: underline;
}

.bio-text {
  grid-row: 2;
  grid-column: 1 / span 2;
  margin-top: 10px;
  font-size: 1.05rem;
}

section {
  margin-bottom: 40px;
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 8px;
}

/* News Section Styles */
.news-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
}

.news-filter {
  display: flex;
  gap: 8px;
  background: var(--section-bg);
  padding: 4px;
  border-radius: 8px;
}

.filter-btn {
  background: none;
  border: none;
  color: var(--secondary-text);
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 0.2s;
}

.filter-btn.active {
  background: var(--bg-color);
  color: var(--accent-color);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.pub-filters {
  display: flex;
  gap: 10px;
}

.filter-select {
  background: var(--section-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}

.filter-select:focus {
  border-color: var(--accent-color);
}

.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-item {
  margin-bottom: 15px;
  padding-left: 20px;
  position: relative;
  display: flex;
  gap: 10px;
}

.news-item::before {
  content: "•";
  color: var(--accent-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.news-date {
  color: var(--secondary-text);
  font-size: 0.85rem;
  white-space: nowrap;
  min-width: 100px;
}

/* Updates Section */
.updates-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.updates-list li {
  margin-bottom: 12px;
  padding-left: 20px;
  position: relative;
}

.updates-list li::before {
  content: "•";
  color: var(--accent-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.updates-list a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
}

.updates-list a:hover {
  text-decoration: underline;
}

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

.pub-item {
  margin-bottom: 20px;
}

.pub-title {
  font-weight: 700;
  display: block;
  font-size: 1rem;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.9rem;
  color: var(--secondary-text);
  display: block;
}

.pub-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.pub-venue {
  font-size: 0.9rem;
  font-style: italic;
  color: var(--accent-color);
}

.pub-year {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--secondary-text);
  margin-left: 5px;
}

.pub-extra {
  margin-left: 10px;
  font-size: 0.85rem;
}

.pub-awards {
  color: #d93025;
  font-weight: 700;
}

.pub-links a {
  color: var(--accent-color);
  text-decoration: none;
  margin-left: 2px;
}

.pub-links a:hover {
  text-decoration: underline;
}

.loading {
  color: var(--secondary-text);
  font-style: italic;
}

.more-pubs {
  margin-top: 20px;
  font-size: 0.9rem;
}

/* Professional Service & Students */
.service-list, .student-list {
  list-style: none;
  padding: 0;
}

.service-list li, .student-list li {
  margin-bottom: 10px;
}

.service-category {
  font-weight: 700;
  margin-right: 5px;
}

.service-list a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
}

.service-list a:hover {
  text-decoration: underline;
}

.student-grid {
  display: block;
  line-height: 2;
  color: var(--secondary-text);
}

.student-grid span {
  display: inline-block;
  background: var(--section-bg);
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.85rem;
  margin: 2px;
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

/* Responsive adjustments */
@media (max-width: 600px) {
  header {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .profile-img {
    grid-row: 1;
    grid-column: 1;
    margin: 0 auto;
  }
  
  .header-info {
    grid-row: 2;
    grid-column: 1;
  }

  .links {
    justify-content: center;
  }

  .bio-text {
    grid-row: 3;
    grid-column: 1;
  }
  
  .news-header {
    flex-direction: column;
    gap: 10px;
  }
  
  .news-item {
    flex-direction: column;
    gap: 2px;
  }
  
  .news-date {
    min-width: unset;
  }
}

footer {
  margin-top: 80px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.8rem;
  color: var(--secondary-text);
}

/* Admin Mode & Inline Metadata Editor */
.admin-toggle-btn {
  background: none;
  border: none;
  color: var(--secondary-text);
  opacity: 0.35;
  cursor: pointer;
  font-size: 0.85rem;
  padding: 2px 6px;
  margin-left: 4px;
  border-radius: 4px;
  transition: opacity 0.2s, background-color 0.2s;
}

.admin-toggle-btn:hover,
.admin-toggle-btn.active {
  opacity: 1;
  color: var(--accent-color);
  background: var(--section-bg);
}

.admin-bar {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: min(860px, calc(100% - 32px));
  background: var(--section-bg);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  border-radius: 10px;
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  z-index: 1000;
  font-size: 0.85rem;
  color: var(--text-color);
}

.admin-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

#admin-sync-msg {
  color: var(--secondary-text);
  font-size: 0.8rem;
}

.admin-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.admin-btn {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.admin-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.admin-btn-primary {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #ffffff;
}

.admin-btn-primary:hover {
  opacity: 0.9;
  color: #ffffff;
}

.pub-edit-btn {
  margin-left: 8px;
  background: var(--section-bg);
  border: 1px solid var(--border-color);
  color: var(--secondary-text);
  font-size: 0.75rem;
  padding: 1px 7px;
  border-radius: 4px;
  cursor: pointer;
}

.pub-edit-btn:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.pub-key-badge {
  margin-left: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.72rem;
  color: var(--secondary-text);
  background: var(--section-bg);
  padding: 1px 5px;
  border-radius: 3px;
}

.pub-edit-form {
  margin-top: 10px;
  padding: 14px;
  background: var(--section-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.pub-edit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px 14px;
}

.pub-edit-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.pub-edit-field label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--secondary-text);
}

.pub-edit-field input,
.pub-edit-field select {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 0.82rem;
}

.pub-edit-field input:focus,
.pub-edit-field select:focus {
  border-color: var(--accent-color);
  outline: none;
}

.pub-edit-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.pub-merge-target-btn {
  border-color: var(--accent-color);
  color: var(--accent-color);
  font-weight: 600;
}

.pub-merge-source-btn {
  background: #d93025;
  border-color: #d93025;
  color: #ffffff;
}

.pub-merge-source-btn:hover {
  color: #ffffff;
  opacity: 0.9;
}

.pub-merged-badge {
  position: relative;
  display: inline-block;
  margin-left: 6px;
  font-size: 0.72rem;
  color: var(--accent-color);
  background: var(--section-bg);
  border: 1px dashed var(--accent-color);
  padding: 0 5px;
  border-radius: 3px;
  cursor: help;
}

.pub-merged-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  width: max-content;
  max-width: 440px;
  background: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.22);
  border-radius: 6px;
  padding: 8px 10px;
  z-index: 200;
  font-style: normal;
  font-weight: normal;
  line-height: 1.4;
  text-align: left;
}

.pub-merged-badge:hover .pub-merged-tooltip {
  display: block;
}

.pub-merged-tooltip-item + .pub-merged-tooltip-item {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed var(--border-color);
}

.pub-merged-tooltip-title {
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-color);
  display: block;
}

.pub-merged-tooltip-authors {
  font-size: 0.75rem;
  color: var(--secondary-text);
  display: block;
}

.pub-merged-tooltip-meta {
  font-size: 0.73rem;
  color: var(--accent-color);
  display: block;
  margin-top: 2px;
}

.pub-merged-list {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-color);
  font-size: 0.8rem;
  color: var(--secondary-text);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.pub-unmerge-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  color: var(--text-color);
}

.pub-unmerge-chip button {
  background: none;
  border: none;
  color: #d93025;
  cursor: pointer;
  font-weight: 700;
  padding: 0 2px;
}

/* Yale Song Number Tool */
.yn-subtitle {
  color: var(--secondary-text);
  font-size: 0.92rem;
  margin-top: -10px;
  margin-bottom: 14px;
}

.yn-subtitle a {
  color: var(--accent-color);
  text-decoration: none;
}

.yn-subtitle a:hover {
  text-decoration: underline;
}

.yn-search-bar {
  display: flex;
  gap: 10px;
  align-items: stretch;
  max-width: 600px;
}

.yn-input-wrap {
  position: relative;
  flex: 1;
}

#yn-input {
  width: 100%;
  box-sizing: border-box;
  padding: 9px 12px;
  font-size: 0.92rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--section-bg);
  color: var(--text-color);
  outline: none;
  transition: border-color 0.2s;
}

#yn-input:focus {
  border-color: var(--accent-color);
}

.yn-btn {
  background: var(--accent-color);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 0 18px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.yn-btn:hover {
  opacity: 0.9;
}

.yn-suggestions {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  list-style: none;
  margin: 0;
  padding: 4px 0;
  z-index: 300;
  max-height: 260px;
  overflow-y: auto;
}

.yn-suggestions li {
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
}

.yn-suggestions li:hover {
  background: var(--section-bg);
}

.yn-sug-name {
  font-weight: 600;
  color: var(--text-color);
}

.yn-sug-meta {
  font-size: 0.76rem;
  color: var(--secondary-text);
  text-align: right;
}

.yn-examples {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 0.8rem;
  color: var(--secondary-text);
}

.yn-example-chip {
  background: var(--section-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.yn-example-chip:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.yn-result {
  margin-top: 18px;
  padding: 18px 20px;
  background: var(--section-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
}

.yn-result-header {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.yn-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-color);
  color: #ffffff;
  font-weight: 800;
  font-size: 1rem;
  padding: 5px 14px;
  border-radius: 999px;
}

.yn-summary {
  font-size: 0.95rem;
  color: var(--text-color);
}

.yn-chain {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.yn-node {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 7px 13px;
  font-weight: 700;
  font-size: 0.92rem;
  width: fit-content;
}

.yn-node-yale {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.yn-node-affil {
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--secondary-text);
}

.yn-edge {
  margin-left: 18px;
  padding: 8px 0 8px 16px;
  border-left: 2px dashed var(--accent-color);
  font-size: 0.84rem;
  color: var(--secondary-text);
}

.yn-edge-paper {
  color: var(--text-color);
  font-weight: 600;
}

.yn-edge a {
  color: var(--accent-color);
  text-decoration: none;
}

.yn-edge a:hover {
  text-decoration: underline;
}

.yn-alt-profiles {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
  font-size: 0.78rem;
  color: var(--secondary-text);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}