:root {
  --bg: #f8f9fc;
  --surface: #fff;
  --border: #e2e6ef;
  --text: #1a1d26;
  --text-muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #059669;
  --error: #dc2626;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  --font: 'DM Sans', system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  line-height: 1.5;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 0;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.toolbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.toolbar-brand h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.db-badge {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: var(--border);
  color: var(--text-muted);
  font-weight: 500;
}

.db-badge.ok {
  background: rgba(5, 150, 105, 0.12);
  color: var(--success);
}

.db-badge.fail {
  background: rgba(220, 38, 38, 0.1);
  color: var(--error);
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

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

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.btn-secondary:hover:not(:disabled) {
  background: #f1f3f6;
  border-color: #c8cdd8;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--text);
  background: rgba(0,0,0,0.04);
}

.btn-sm {
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
}

.input-select {
  font-family: var(--font);
  font-size: 0.875rem;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

/* Main content */
.content {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 1.25rem;
  min-height: 0;
}

@media (max-width: 800px) {
  .content {
    grid-template-columns: 1fr;
  }
}

.errors-section,
.detail-section {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 280px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
}

.section-header h2,
.detail-section h2 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.detail-section h2 {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
}

.error-list {
  flex: 1;
  overflow: auto;
  padding: 0.5rem;
}

.error-card {
  padding: 0.75rem 1rem;
  margin-bottom: 0.35rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.error-card:hover {
  background: #eef1f6;
  border-color: var(--accent);
}

.error-card.selected {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.08);
  box-shadow: 0 0 0 1px var(--accent);
}

.error-card .code {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.error-card .time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  font-variant-numeric: tabular-nums;
}

.error-card .desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.error-card.no-error .code {
  color: var(--success);
}

.record-detail {
  flex: 1;
  padding: 1rem;
  overflow: auto;
  font-size: 0.9rem;
}

.record-detail .empty-state {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.875rem;
}

.detail-grid {
  display: grid;
  gap: 0.4rem 1rem;
  grid-template-columns: auto 1fr;
  align-items: baseline;
}

.detail-grid dt {
  margin: 0;
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.detail-grid dd {
  margin: 0;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.detail-grid .detail-raw {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 0.35rem;
}

.dev-pm {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.dev-pm span {
  padding: 0.2rem 0.45rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.dev-pm span.on {
  background: rgba(5, 150, 105, 0.12);
  border-color: var(--success);
  color: var(--success);
}

/* Activity */
.activity-section {
  margin-top: 1rem;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.activity-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.raw-inline {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.input-inline {
  width: 140px;
  font-family: var(--font);
  font-size: 0.8rem;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.input-inline:focus {
  outline: none;
  border-color: var(--accent);
}

.input-inline::placeholder {
  color: var(--text-muted);
}

.activity-log {
  max-height: 120px;
  overflow: auto;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.activity-log .log-line {
  padding: 0.15rem 0;
  border-bottom: 1px solid transparent;
  word-break: break-all;
}

.activity-log .log-line.tx {
  color: var(--accent);
}

.activity-log .log-line.rx {
  color: var(--text-muted);
}

/* Footer */
.footer {
  margin-top: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

.footer p {
  margin: 0.35rem 0;
}

.footer-thanks a {
  color: var(--accent);
  text-decoration: none;
}

.footer-thanks a:hover {
  text-decoration: underline;
}

.footer-made {
  color: var(--text-muted);
  font-size: 0.85rem;
}