#cityrail-performance-monitor {
  position: fixed;
  z-index: 1900;
  top: calc(env(safe-area-inset-top, 0px) + 76px);
  right: max(12px, env(safe-area-inset-right, 0px));
  width: 232px;
  max-width: calc(100vw - 24px);
  max-height: calc(100dvh - 158px);
  overflow: auto;
  box-sizing: border-box;
  padding: 12px 14px;
  border: 1px solid var(--material-rim, var(--ui-line));
  border-radius: 20px;
  background: var(--material-panel, var(--ui-surface));
  color: var(--ui-text);
  box-shadow: var(--material-shadow, 0 8px 28px #0002);
  backdrop-filter: var(--material-blur, none);
  -webkit-backdrop-filter: var(--material-blur, none);
  font: 12px/1.4 -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif;
  font-variant-numeric: tabular-nums;
  font-optical-sizing: auto;
  overscroll-behavior: contain;
}
#cityrail-performance-monitor .perf-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 650;
}
#cityrail-performance-monitor .perf-heading i {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 6px;
  border-radius: 50%;
  background: #30b574;
}
#cityrail-performance-monitor .perf-close {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--material-inset, var(--ui-canvas));
  color: inherit;
  font: 20px/1 system-ui;
  cursor: pointer;
  transition: transform 120ms ease;
}
#cityrail-performance-monitor .perf-close:active { transform: scale(.94); }
#cityrail-performance-monitor .perf-close:focus-visible { outline: 2px solid #0a84ff; outline-offset: 2px; }
#cityrail-performance-monitor .perf-headline { display: flex; justify-content: space-between; align-items: baseline; margin-top: 4px; }
#cityrail-performance-monitor .perf-headline strong { font-size: 34px; font-weight: 650; letter-spacing: -.04em; line-height: 1.2; }
#cityrail-performance-monitor .perf-headline span { color: var(--ui-muted); font-size: 10px; }
#cityrail-performance-monitor .perf-chart { display: block; width: 100%; height: 28px; margin: 6px 0 10px; }
#cityrail-performance-monitor .perf-chart polyline { fill: none; stroke: #0a84ff; stroke-width: 1.6; stroke-linejoin: round; }
#cityrail-performance-monitor .perf-chart-guide { fill: none; stroke: var(--ui-line); }
#cityrail-performance-monitor .perf-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 8px; margin: 0; }
#cityrail-performance-monitor .perf-metrics dt { font-size: 10px; color: var(--ui-muted); }
#cityrail-performance-monitor .perf-metrics dd { margin: 2px 0 0; font-size: 12px; font-weight: 600; white-space: nowrap; }
@media (max-width: 600px) {
  #cityrail-performance-monitor { width: 200px; top: calc(env(safe-area-inset-top, 0px) + 70px); right: max(8px, env(safe-area-inset-right, 0px)); padding: 10px 12px; border-radius: 18px; }
  #cityrail-performance-monitor .perf-close { width: 32px; height: 32px; }
  #cityrail-performance-monitor .perf-metrics { gap: 7px 6px; }
}
@media (prefers-reduced-motion: reduce) {
  #cityrail-performance-monitor .perf-close { transition: none; }
}
@media (prefers-reduced-transparency: reduce), (prefers-contrast: more) {
  #cityrail-performance-monitor { background: var(--ui-surface); backdrop-filter: none; -webkit-backdrop-filter: none; border-color: var(--ui-text); }
}

#cityrail-performance-monitor .perf-export {
  display: block;
  width: 100%;
  min-height: 32px;
  margin-top: 8px;
  border: 1px solid var(--ui-line);
  border-radius: 9px;
  background: var(--material-inset, var(--ui-canvas));
  color: inherit;
  font: inherit;
  cursor: pointer;
}
#cityrail-performance-monitor .perf-export:focus-visible { outline: 2px solid #0a84ff; outline-offset: 2px; }
#cityrail-performance-monitor .perf-export-status { display: block; margin-top: 4px; color: var(--ui-muted); font-size: 9px; }