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

[hidden] {
  display: none !important;
}

:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1a1d23;
  --text-secondary: #6b7280;
  --primary: #2b3a4e;
  --primary-hover: #3d5068;
  --error: #dc2626;
  --error-bg: #fef2f2;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --suggestion: #2563eb;
  --suggestion-bg: #eff6ff;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px;
}

header {
  margin-bottom: 40px;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--text-secondary);
  margin-top: 6px;
  font-size: 0.95rem;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.user-menu {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  white-space: nowrap;
}

.auth-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(100%, 380px);
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

.auth-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 14px;
  color: var(--primary);
  background: rgba(43, 58, 78, 0.08);
}

.auth-card h1 {
  font-size: 1.5rem;
  line-height: 1.2;
  margin-bottom: 20px;
}

.auth-card input {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.auth-card input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43, 58, 78, 0.08);
}

.auth-card .btn-primary {
  margin-top: 8px;
}

.auth-error {
  margin-top: 12px;
  padding: 10px 12px;
  color: var(--error);
  background: var(--error-bg);
  border-radius: 8px;
  font-size: 0.9rem;
}

.input-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  background: var(--bg);
  border-radius: 6px;
  padding: 3px;
}

.tab {
  flex: 1;
  padding: 8px 16px;
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.tab.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  color: var(--text-secondary);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--primary);
  background: rgba(43, 58, 78, 0.03);
}

.drop-zone svg {
  margin-bottom: 12px;
  opacity: 0.5;
}

.drop-zone .link {
  color: var(--primary);
  text-decoration: underline;
  cursor: pointer;
}

.drop-zone .hint {
  font-size: 0.8rem;
  margin-top: 6px;
  opacity: 0.6;
}

.file-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg);
  border-radius: 6px;
  margin-top: 12px;
  font-size: 0.9rem;
}

.btn-clear {
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.15s;
  display: flex;
  align-items: center;
}

.btn-clear:hover {
  opacity: 1;
}

.url-input input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}

.url-input input:focus {
  border-color: var(--primary);
}

.btn-primary {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--bg);
}

.results-section {
  margin-top: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.results-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
}

.results-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.summary {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
}

.summary .count {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.summary .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot.error { background: var(--error); }
.dot.warning { background: var(--warning); }
.dot.suggestion { background: var(--suggestion); }

.pages-count {
  font-weight: 500;
  color: var(--primary);
}

.table-toolbar {
  min-height: 28px;
  margin-bottom: 8px;
}

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

thead th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  white-space: nowrap;
}

.th-sort {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  cursor: pointer;
}

.th-sort span {
  min-width: 10px;
  color: var(--primary);
}

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tbody tr.severity-error { background: var(--error-bg); }
tbody tr.severity-warning { background: var(--warning-bg); }
tbody tr.severity-suggestion { background: var(--suggestion-bg); }

tbody tr:hover {
  filter: brightness(0.97);
}

td.col-page {
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.8rem;
}

td.col-page a {
  color: var(--primary);
  text-decoration: none;
}

td.col-page a:hover {
  text-decoration: underline;
}

td.col-text {
  max-width: 180px;
  word-break: break-word;
}

td.col-message {
  max-width: 280px;
}

td.col-replacement {
  max-width: 160px;
  word-break: break-word;
}

.severity-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}

.severity-badge.error {
  background: #fecaca;
  color: #991b1b;
}
.severity-badge.warning {
  background: #fde68a;
  color: #92400e;
}
.severity-badge.suggestion {
  background: #bfdbfe;
  color: #1e40af;
}

.no-issues {
  text-align: center;
  padding: 40px 0;
  color: var(--text-secondary);
}

.no-issues svg {
  margin-bottom: 12px;
}

.loading {
  text-align: center;
  padding: 60px 0;
  color: var(--text-secondary);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  margin: 0 auto 12px;
  animation: spin 0.7s linear infinite;
}

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

.crawl-progress {
  margin-top: 16px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  width: 0;
  transition: width 0.3s ease;
}

.progress-info {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Hide/Show toggle --- */
.filter-link {
  padding: 6px 12px;
  border: none;
  background: transparent;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text-secondary);
  text-decoration: underline;
  margin-left: 8px;
}

.filter-link:hover {
  color: var(--text);
}

.col-action {
  width: 32px;
  padding: 6px 4px !important;
}

.btn-hide {
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.3;
  transition: opacity 0.15s;
  display: flex;
  align-items: center;
  padding: 2px;
}

.btn-hide:hover {
  opacity: 0.8;
}

tr.row-hidden {
  opacity: 0.4;
}

tr.row-hidden .btn-hide {
  opacity: 0.6;
}

.rules-panel {
  display: grid;
  gap: 16px;
}

.rules-intro h2 {
  font-size: 1rem;
  font-weight: 600;
}

.rules-intro p {
  margin-top: 4px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.rules-block {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(248, 249, 251, 0.55);
}

.rules-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.rules-block-head h3 {
  font-size: 0.95rem;
  font-weight: 600;
}

.rules-block-head span {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.rule-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.rule-form input {
  flex: 1;
  min-width: 140px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.85rem;
  outline: none;
}

.rule-form input:focus {
  border-color: var(--primary);
}

.rule-form select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.85rem;
  background: var(--surface);
}

.btn-add {
  padding: 8px 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
}

.btn-add:hover {
  background: var(--primary-hover);
}

.rule-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  margin-top: 8px;
  background: var(--bg);
  border-radius: 4px;
  font-size: 0.85rem;
}

.rule-info {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: 0;
}

.rule-pattern {
  font-family: monospace;
  background: rgba(0,0,0,0.06);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.8rem;
  white-space: nowrap;
}

.builtin-rule {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font-size: 0.85rem;
}

.rule-group + .rule-group,
.builtin-rule + .builtin-rule {
  margin-top: 8px;
}

.rule-group {
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.7);
}

.rule-group-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.rule-group-head h4 {
  font-size: 0.9rem;
  font-weight: 600;
}

.rule-group-head span {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.builtin-rule summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.builtin-rule p {
  margin-top: 8px;
  color: var(--text-secondary);
}

.rule-meta {
  margin-top: 8px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
}

.rule-generalization {
  color: var(--text) !important;
}

.rule-source {
  flex-shrink: 0;
  min-width: 82px;
  color: var(--primary);
  font-size: 0.76rem;
  font-weight: 600;
}

.rule-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rule-severity {
  flex-shrink: 0;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
}

.rule-status {
  flex-shrink: 0;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 600;
}

.rule-status.partial {
  color: var(--warning);
}

.rule-status.manual,
.rule-status.disabled {
  color: var(--text-secondary);
}

.rule-severity.error {
  background: #fecaca;
  color: #991b1b;
}

.rule-severity.warning {
  background: #fde68a;
  color: #92400e;
}

.rule-severity.suggestion {
  background: #bfdbfe;
  color: #1e40af;
}

.rule-msg {
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rule-samples,
.rule-examples {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.rule-examples strong {
  color: var(--text-secondary);
  font-size: 0.78rem;
  margin-right: 2px;
}

.rule-samples code,
.rule-examples code {
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0,0,0,0.06);
  color: var(--text);
  font-size: 0.78rem;
}

.rule-del {
  flex-shrink: 0;
}

.rules-empty {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 8px;
}

@media (max-width: 640px) {
  .container { padding: 20px 16px; }
  .results-header { flex-direction: column; align-items: flex-start; }
  .results-actions { width: 100%; justify-content: space-between; }
  .rule-info { flex-wrap: wrap; }
}