:root {
  color-scheme: dark;
  --background: #000;
  --panel: #000;
  --track: #202024;
  --text: #eee;
  --muted: #92929e;
  --border: #242428;
  --blue: linear-gradient(135deg, #60c8ff, #2563eb);
  --purple: linear-gradient(135deg, #d8a0ff, #7c3aed);
  --amber: linear-gradient(135deg, #fde047, #f97316);
}
:root[data-theme="light"] {
  color-scheme: light;
  --background: #f6f7fb;
  --panel: #fff;
  --track: #dcdfe8;
  --text: #20202a;
  --muted: #626273;
  --border: #dcdfe8;
  --blue: linear-gradient(135deg, #007bbd, #254fce);
  --purple: linear-gradient(135deg, #9333ea, #6525ca);
  --amber: linear-gradient(135deg, #a66b00, #c2410c);
}
:root body { margin: 0; background: var(--background); color: var(--text); font-family: Roboto, sans-serif; }
/* Preserve the engine's SVG definitions and bindings, replacing only its visible layout. */
body > #OpenSpeedtest { position: absolute; width: 0 !important; height: 0 !important; overflow: hidden; pointer-events: none; }
.dashboard { box-sizing: border-box; width: min(760px, calc(100% - 80px)); margin: 0 auto; padding: 22px 0 12px; }
.dashboard-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.dashboard-brand { font-size: 14px; font-weight: 500; letter-spacing: .08em; }
#theme-toggle { border: 1px solid var(--border); background: var(--panel); color: var(--text); border-radius: 50%; width: 40px; height: 40px; cursor: pointer; font-size: 24px; }
.results { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; text-align: center; }
.metric { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 18px 6px; }
.metric h2, .chart-panel h2 { margin: 0 0 10px; font-size: 13px; font-weight: 500; }
.metric-value { font-size: clamp(23px, 4vw, 34px); font-weight: 500; font-variant-numeric: tabular-nums; }
.metric-unit { margin-left: 4px; font-size: 12px; color: var(--muted); }
.download .accent { background: var(--blue); }
.upload .accent { background: var(--purple); }
.latency .accent { background: var(--amber); }
.accent { background-clip: text !important; -webkit-background-clip: text !important; color: transparent; }
.metric-icon { width: 13px; height: 15px; vertical-align: -2px; margin-right: 5px; }
.gauge-wrap { width: min(100%, 460px); margin: 22px auto 0; }
.dashboard-gauge { display: block; width: 100%; height: auto; overflow: visible; }
.test-actions { text-align: center; margin: -10px 0 24px; min-height: 48px; }
#test-start { background: var(--blue); border: 0; border-radius: 999px; color: #fff; font: 500 14px Roboto, sans-serif; letter-spacing: .12em; padding: 15px 52px; cursor: pointer; }
#test-start:disabled { opacity: .45; cursor: default; }
button:focus-visible { outline: 3px solid #a855f7; outline-offset: 4px; }
.charts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.results, .charts { width: 96%; margin-inline: auto; }
.chart-panel { min-width: 0; padding: 16px; background: var(--panel); border: 1px solid var(--border); border-radius: 16px; }
.chart-panel svg.chart { width: 100%; height: 85px; display: block; }
.chart-baseline { stroke: var(--border); stroke-width: 1; }
.jitter-panel { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 16px 8px; text-align: center; }
.latency-metric { min-width: 0; }
.latency-metric + .latency-metric { border-left: 1px solid var(--border); }
.latency-metric > div { margin-top: 10px; }
.latency-metric h2 { line-height: 1.5; }
.jitter-panel h2 { margin: 0; }
.jitter-panel .metric-value { font-size: 22px; }
.oDo-Meter, .oDoTop-Speed { fill: var(--muted); }
.oDoLive-Speed { fill: var(--text); }
.oDoLive-Status { fill: var(--muted); }
.main-Gaugebg, .progressbg { stroke: var(--track); }
.uiBg, .Cards { fill: var(--panel); }
#upSymbol path, #upSymbol rect, #graphc2 polygon { fill: url(#uploadGradient); }
#downSymbol path, #downSymbol rect, #graphc1 polygon { fill: url(#gradient); }
#pingSymbol path { fill: url(#latencyGradient); }
#upSymbolDesk, #upSymbolMob { fill: url(#uploadGradient); }
#downSymbolDesk, #downSymbolMob { fill: url(#gradient); }
.main-GaugeBlue, .deskStart, .intro-Progress { stroke: url(#gradient); }
body[data-phase="upload"] .main-GaugeBlue, body[data-phase="upload"] .intro-Progress { stroke: url(#uploadGradient); }
body[data-phase="upload"] .oDoLive-Speed { fill: url(#uploadGradient); }
body[data-phase="download"] .oDoLive-Speed { fill: url(#gradient); }
.Credits, .Credits a { color: var(--muted); font-size: 11px; }
.Credits { max-width: 760px; margin: 16px auto; padding: 0 12px; }
.Credits a:hover { color: #2997ff; }
.spinner > div { background: var(--blue); }
@media (max-width: 600px), (max-aspect-ratio: 3/4) {
  .dashboard { width: 100%; padding: 12px 0; }
  .dashboard-header { padding: 0 12px; margin-bottom: 16px; }
  .results, .charts { gap: 6px; }
  .results, .charts { width: 100%; }
  .metric { padding: 14px 3px; border-radius: 10px; }
  .metric h2 { font-size: 11px; }
  .metric-unit { display: block; margin: 4px 0 0; }
  .gauge-wrap { margin-top: 18px; }
  .chart-panel { padding: 12px 8px; border-radius: 10px; }
  .jitter-panel { gap: 4px; padding: 14px 4px; }
  .latency-metric h2 { font-size: 11px; }
}