:root {
  color-scheme: dark;
  --bg: #0b0e14;
  --bg-elev: #11151c;
  --bg-elev2: #161b24;
  --fg: #d6deeb;
  --fg-dim: #8492a6;
  --accent: #4fd1c5;
  --accent-2: #38f29d;
  --warn: #f6c177;
  --err: #ff6b6b;
  --grid: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
}

body {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 600;
  letter-spacing: 0.3px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.demo-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--warn);
  color: #1a1300;
  margin-left: 4px;
}

/* Demo-mode controls stay visible (so visitors can preview the future UI),
 * but a subtle dim communicates that they don't actually take effect yet. */
.controls--demo {
  opacity: 0.75;
}
.controls--demo input,
.controls--demo button {
  cursor: not-allowed;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 0 currentColor;
  animation: pulse 1.6s ease-out infinite;
}
.dot[data-state="open"] {
  background: var(--accent-2);
}
.dot[data-state="closed"] {
  background: var(--err);
  animation: none;
}
.dot[data-state="connecting"] {
  background: var(--warn);
}
.dot[data-state="stale"] {
  background: var(--warn);
  animation: pulse 1.2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(56, 242, 157, 0.5);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(56, 242, 157, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(56, 242, 157, 0);
  }
}

.controls {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  color: var(--fg-dim);
}

.controls input {
  background: var(--bg-elev2);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 6px 8px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  width: 130px;
}

.controls input:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.controls button {
  background: var(--accent);
  color: #0b0e14;
  border: 0;
  padding: 7px 12px;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
}

.controls button[type="button"] {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
  font-weight: 500;
}

.controls button:hover {
  filter: brightness(1.05);
}

.hud {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
}

.hud-cell {
  background: var(--bg-elev);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hud-cell.wide {
  grid-column: span 2;
}

.hud-label {
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.hud-sub {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--fg);
  text-transform: none;
  font-size: 11px;
}

.hud-value {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 15px;
  font-weight: 500;
  color: var(--fg);
}

.progress {
  width: 100%;
  height: 6px;
  background: var(--bg-elev2);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 80ms linear;
}

.chart {
  position: relative;
  background: var(--bg);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.hb-tooltip {
  position: absolute;
  z-index: 5;
  min-width: 220px;
  max-width: 280px;
  padding: 10px 12px;
  background: rgba(17, 21, 28, 0.94);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow:
    0 6px 24px rgba(0, 0, 0, 0.6),
    0 1px 0 rgba(255, 255, 255, 0.04) inset;
  color: var(--fg);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  pointer-events: none;
  opacity: 0;
  transform: translateY(2px);
  transition:
    opacity 100ms ease,
    transform 100ms ease;
  backdrop-filter: blur(2px);
}

.hb-tooltip.show {
  opacity: 1;
  transform: translateY(0);
}

.tt-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.tt-dir-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg-dim);
  flex-shrink: 0;
}

.tt-bull .tt-dir-dot {
  background: hsl(148, 80%, 60%);
}

.tt-bear .tt-dir-dot {
  background: hsl(358, 80%, 62%);
}

.tt-title {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.tt-bull .tt-title {
  color: hsl(148, 60%, 75%);
}

.tt-bear .tt-title {
  color: hsl(358, 70%, 78%);
}

.tt-magnitude {
  margin-left: auto;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--fg);
  font-size: 11px;
}

.tt-body {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 3px 12px;
  margin: 0;
}

.tt-body dt {
  color: var(--fg-dim);
  font-weight: 400;
}

.tt-body dd {
  margin: 0;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

.tt-delta {
  color: var(--fg-dim);
  margin-left: 4px;
  font-size: 11px;
}

.tt-bull .tt-delta {
  color: hsl(148, 60%, 75%);
}

.tt-bear .tt-delta {
  color: hsl(358, 70%, 78%);
}

.empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  color: var(--fg-dim);
  text-align: center;
  padding: 24px;
  font-size: 13px;
  opacity: 0;
  transition: opacity 200ms ease;
}

.empty.show {
  opacity: 1;
}

.footer {
  padding: 8px 16px;
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  min-height: 30px;
}