/* Citation Metadata Checker — Styles */

:root {
  --bg: #fafafa;
  --card: #ffffff;
  --border: #e0e0e0;
  --text: #1a1a1a;
  --text-secondary: #666;
  --accent: #2563eb;
  --green: #16a34a;
  --yellow: #ca8a04;
  --red: #dc2626;
  --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

header .subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Search */
.search-box {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.search-box input {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus {
  border-color: var(--accent);
}

.search-box button {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.2s;
  white-space: nowrap;
}

.search-box button:hover { opacity: 0.9; }
.search-box button:disabled { opacity: 0.5; cursor: not-allowed; }

.search-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Report */
.report {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 1rem;
}

.report-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.report.clean .report-header { color: var(--green); }
.report.has-warn .report-header { color: var(--yellow); }
.report.has-error .report-header { color: var(--red); }
.report.not-found .report-header { color: var(--red); }

/* DOI link */
.doi-link {
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}

.doi-link a {
  color: var(--accent);
  text-decoration: none;
  font-family: monospace;
}

.doi-link a:hover { text-decoration: underline; }

.doi-link .hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Abstract */
.abstract-box {
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  line-height: 1.5;
}

.abstract-box strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.abstract-box p {
  margin: 0;
}

.expand-btn {
  margin-top: 0.4rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  color: var(--accent);
}

.expand-btn:hover { background: #f0f0f0; }

/* Status icons */
.status-icon { font-size: 1.1rem; }
.status-icon.ok { color: var(--green); }
.status-icon.warn { color: var(--yellow); }
.status-icon.error { color: var(--red); }
.status-icon.na { color: #999; }
.status-icon.single { color: var(--accent); font-size: 0.85rem; font-weight: 700; }

/* Comparison table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

.comparison-table th {
  text-align: left;
  padding: 0.5rem 0.6rem;
  background: #f5f5f5;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.comparison-table td {
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid #f0f0f0;
  vertical-align: top;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.comparison-table .field-name {
  font-weight: 600;
  white-space: nowrap;
  width: 70px;
}

.comparison-table .status-cell {
  text-align: center;
  width: 30px;
}

.row-variant { background: #fefce8; }
.row-substantive { background: #fef2f2; }

.na { color: #ccc; }

.doi-display {
  font-family: monospace;
  background: #f5f5f5;
  padding: 0.5rem;
  border-radius: 4px;
  word-break: break-all;
}

/* Suggested citation */
.suggested-section {
  margin-top: 1rem;
}

.suggested-section h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.suggested-section .hint {
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.format-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 0;
}

.tab {
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  background: #f5f5f5;
  cursor: pointer;
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  font-weight: 500;
}

.tab.active {
  background: var(--card);
  border-bottom: 1px solid var(--card);
  font-weight: 600;
  color: var(--accent);
}

.format-content {
  border: 1px solid var(--border);
  border-radius: 0 var(--radius) var(--radius) var(--radius);
  padding: 1rem;
  background: #fafafa;
}

.format-content pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.82rem;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.format-content.hidden { display: none; }

.copy-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.copy-btn:hover { opacity: 0.9; }
.copy-btn.copied { background: var(--green); }

/* Methodology note */
.methodology-note {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Loading */
.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* How it works */
.how-it-works {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.how-it-works h2 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.step .number {
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.step h3 { font-size: 0.9rem; margin-bottom: 0.3rem; }
.step p { font-size: 0.8rem; color: var(--text-secondary); }

/* Footer */
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.s2-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  cursor: pointer;
  margin-bottom: 0.5rem;
}

.s2-toggle input { cursor: pointer; }

footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* Mode tabs */
.mode-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--border);
}

.mode-tab {
  padding: 0.6rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}

.mode-tab:hover { color: var(--text); }
.mode-tab.mode-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.hidden { display: none !important; }

/* Batch upload */
.batch-upload {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 0.75rem;
  transition: border-color 0.2s, background 0.2s;
}

.batch-upload.drag-over {
  border-color: var(--accent);
  background: #eff6ff;
}

.batch-upload-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.batch-upload-hint {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.file-input-hidden { display: none; }

.upload-browse-btn {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  background: white;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 500;
}

.upload-browse-btn:hover { background: #eff6ff; }

.batch-textarea {
  width: 100%;
  padding: 0.75rem;
  font-size: 0.85rem;
  font-family: monospace;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  resize: vertical;
  margin-bottom: 0.5rem;
}

.batch-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.batch-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.batch-info {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.batch-buttons {
  display: flex;
  gap: 0.5rem;
}

.start-btn {
  padding: 0.6rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}

.start-btn:hover { opacity: 0.9; }
.start-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.stop-btn {
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--red);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}

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

/* Batch progress */
.batch-progress {
  padding: 1rem 0;
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background: #e5e7eb;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.batch-live-log {
  max-height: 200px;
  overflow-y: auto;
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem;
  background: #fafafa;
}

.live-log-item {
  padding: 0.2rem 0.4rem;
  border-bottom: 1px solid #f0f0f0;
  line-height: 1.4;
}

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

/* Batch summary */
.batch-summary-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.batch-summary-card h3 {
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

.batch-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.stat {
  text-align: center;
  padding: 0.75rem 0.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.stat-num {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.stat-clean .stat-num { color: var(--green); }
.stat-variant .stat-num { color: var(--yellow); }
.stat-substantive .stat-num { color: var(--red); }
.stat-notfound .stat-num { color: var(--red); }
.stat-warn { display: block; font-size: 0.65rem; color: var(--red); font-weight: 600; margin-top: 0.15rem; }

.batch-exports {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.export-btn {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  background: white;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: var(--radius);
  cursor: pointer;
}

.export-btn:hover { background: #eff6ff; }

/* Batch detail table */
.batch-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.batch-table th {
  text-align: left;
  padding: 0.5rem 0.6rem;
  background: #f5f5f5;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.batch-table td {
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid #f0f0f0;
}

.batch-row {
  cursor: pointer;
  transition: background 0.15s;
}

.batch-row:hover { background: #f5f7ff; }

.batch-label { font-weight: 500; font-family: monospace; font-size: 0.8rem; max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.batch-title { max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-secondary); }
.batch-found { text-align: center; width: 60px; }
.batch-status { font-weight: 500; white-space: nowrap; }

.batch-status-clean { color: var(--green); }
.batch-status-variant { color: var(--yellow); }
.batch-status-substantive { color: var(--red); }
.batch-status-not-found { color: var(--red); font-weight: 700; }

.batch-row-clean { }
.batch-row-variant { background: #fefce8; }
.batch-row-substantive { background: #fef2f2; }
.batch-row-not-found { background: #fef2f2; }

.batch-detail-report {
  border: 2px solid var(--accent);
}

/* Responsive */
@media (max-width: 640px) {
  .container { padding: 1rem; }
  header h1 { font-size: 1.3rem; }
  .search-box { flex-direction: column; }
  .steps { grid-template-columns: 1fr; }
  .comparison-table { font-size: 0.75rem; }
  .comparison-table td { max-width: 120px; }
  .batch-stats { grid-template-columns: repeat(2, 1fr); }
  .batch-label { max-width: 120px; }
  .batch-title { max-width: 150px; }
  .mode-tab { padding: 0.5rem 1rem; font-size: 0.85rem; }
}