/**
 * Reliability layer styles — error boundary, offline banner, diagnostics.
 */
.zg-error-boundary {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(6, 14, 26, 0.85);
  backdrop-filter: blur(8px);
}

.zg-error-boundary[hidden] { display: none !important; }

body.zg-error-active { overflow: hidden; }

.zg-eb-card {
  max-width: 440px;
  width: 100%;
  background: var(--surface, #0A2A20);
  border: 1px solid var(--border, rgba(255,255,255,.1));
  border-radius: 16px;
  padding: 32px 28px;
  text-align: center;
  box-shadow: 0 24px 48px rgba(0,0,0,.4);
}

.zg-eb-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: rgba(239,68,68,.12);
  color: #F87171;
  display: flex;
  align-items: center;
  justify-content: center;
}

.zg-eb-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary, #F0F4FF);
  margin-bottom: 8px;
}

.zg-eb-msg {
  font-size: 14px;
  color: var(--text-secondary, #94A3B8);
  line-height: 1.5;
  margin-bottom: 12px;
}

.zg-eb-id {
  font-size: 12px;
  color: var(--text-muted, #64748B);
  margin-bottom: 20px;
}

.zg-eb-id code {
  font-family: 'JetBrains Mono', monospace;
  background: rgba(255,255,255,.06);
  padding: 2px 8px;
  border-radius: 6px;
  color: var(--amber, #F97316);
}

.zg-eb-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 12px;
}

.zg-eb-btn {
  padding: 9px 18px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity .15s;
}

.zg-eb-btn:focus-visible {
  outline: 2px solid var(--amber, #F97316);
  outline-offset: 2px;
}

.zg-eb-btn--primary {
  background: var(--amber, #F97316);
  color: #04140F;
}

.zg-eb-btn--secondary {
  background: var(--surface-2, #0E3B2E);
  color: var(--text-primary, #F0F4FF);
  border: 1px solid var(--border, rgba(255,255,255,.1));
}

.zg-eb-btn--ghost {
  background: transparent;
  color: var(--text-secondary, #94A3B8);
}

.zg-eb-hint {
  font-size: 11px;
  color: var(--text-muted, #64748B);
}

/* Offline banner */
.zg-offline-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 99998;
  background: #92400E;
  color: #FEF3C7;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}

.zg-offline-banner[hidden] { display: none !important; }

body.zg-offline .main,
body.zg-offline main {
  padding-top: 44px;
}

/* Diagnostics */
.zg-diag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.zg-diag-card {
  background: var(--surface, #0A2A20);
  border: 1px solid var(--border, rgba(255,255,255,.08));
  border-radius: 12px;
  padding: 16px 18px;
}

.zg-diag-card h4 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted, #64748B);
  margin-bottom: 6px;
  font-weight: 700;
}

.zg-diag-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary, #F0F4FF);
}

.zg-diag-sub {
  font-size: 12px;
  color: var(--text-secondary, #94A3B8);
  margin-top: 4px;
}

.zg-diag-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
}

.zg-diag-status--ok { background: rgba(34,197,94,.15); color: #4ADE80; }
.zg-diag-status--warn { background: rgba(224,180,76,.15); color: #F2CE7A; }
.zg-diag-status--fail { background: rgba(239,68,68,.15); color: #F87171; }

.zg-diag-section {
  margin-bottom: 28px;
}

.zg-diag-section-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary, #F0F4FF);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border, rgba(255,255,255,.08));
}

.zg-diag-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.zg-diag-table th,
.zg-diag-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border, rgba(255,255,255,.06));
}

.zg-diag-table th {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-muted, #64748B);
  font-weight: 600;
}

@media (max-width: 768px) {
  .zg-diag-grid { grid-template-columns: 1fr 1fr; }
  .zg-eb-card { padding: 24px 20px; }
}

@media (max-width: 480px) {
  .zg-diag-grid { grid-template-columns: 1fr; }
}