:root {
  --bg: #090d0c;
  --surface: #101714;
  --surface-raised: #141d19;
  --line: #1e2b26;
  --phosphor: #46ffb0;
  --phosphor-dim: #2b6b4f;
  --amber: #ffb020;
  --alarm: #ff4a4a;
  --ink: #d9e7e1;
  --ink-dim: #64796f;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Mono', 'Roboto Mono', Menlo, Consolas, monospace;

  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

/* Faint instrument-screen graticule, fixed behind all content */
.scope-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.55;
  mask-image: radial-gradient(ellipse at top, black, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at top, black, transparent 78%);
}

.frame {
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin-inline: auto;
  padding: 1.25rem 1rem 3rem;
}

/* Calibration corner brackets, evoking an instrument bezel */
.frame::before,
.frame::after {
  content: '';
  position: fixed;
  width: 14px;
  height: 14px;
  border: 1px solid var(--phosphor-dim);
  opacity: 0.6;
  z-index: 2;
  pointer-events: none;
}

.frame::before {
  top: 10px;
  left: 10px;
  border-right: none;
  border-bottom: none;
}

.frame::after {
  bottom: 10px;
  right: 10px;
  border-left: none;
  border-top: none;
}

.eyebrow {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.control-strip {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.9rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  margin: 0.15rem 0 0;
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding-bottom: 0.3rem;
}

.live-indicator__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--phosphor);
  box-shadow: 0 0 6px 1px var(--phosphor);
}

.live-indicator__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.live-indicator.is-stale .live-indicator__dot {
  background: var(--ink-dim);
  box-shadow: none;
}

.live-indicator.is-stale .live-indicator__label {
  color: var(--alarm);
}

@media (prefers-reduced-motion: no-preference) {
  .live-indicator__dot.pulse {
    animation: dot-pulse 0.5s ease-out;
  }
}

@keyframes dot-pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.8);
    opacity: 0.4;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.channels {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.channel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}

.channel__tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  padding: 0.5rem 0.85rem 0;
}

.trace {
  height: 40px;
  overflow: hidden;
  margin: 0.25rem 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.trace__strip {
  width: 100%;
  height: 100%;
  fill: none;
  stroke-width: 2;
}

.trace__wave {
  stroke: currentColor;
  transform: translateX(220px);
}

.trace--fresh {
  color: var(--phosphor);
}
.trace--fresh .trace__wave {
  filter: drop-shadow(0 0 3px var(--phosphor-dim));
}

.trace--warn {
  color: var(--amber);
}

.trace--offline {
  color: var(--alarm);
  opacity: 0.55;
}

@media (prefers-reduced-motion: no-preference) {
  .trace.is-beating .trace__wave {
    animation: blip-sweep 2.8s linear 1;
  }
}

@keyframes blip-sweep {
  from {
    transform: translateX(220px);
  }
  to {
    transform: translateX(-100px);
  }
}

.channel__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem 0.55rem;
  padding: 0.65rem 0.85rem 0.5rem;
}

.channel__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  transform: translateY(1px);
}

.channel__dot--online {
  background: var(--phosphor);
  box-shadow: 0 0 5px 1px var(--phosphor-dim);
}

.channel__dot--offline {
  background: var(--alarm);
}

.channel__name {
  font-weight: 600;
  font-size: 1rem;
  flex: 1;
  min-width: 0;
  overflow-wrap: break-word;
}

.channel__status {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.channel__status--online {
  color: var(--phosphor);
}

.channel__status--offline {
  color: var(--alarm);
}

.channel__lastseen {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
  flex-basis: 100%;
  padding-left: 1.55rem;
}

.channel__fields {
  padding: 0.15rem 0.85rem 0.75rem;
}

.field-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.28rem 0;
  border-top: 1px solid var(--line);
}

.field-row:first-child {
  border-top: none;
}

.field-row__label {
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-dim);
  flex-shrink: 0;
}

.field-row__value-group {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  min-width: 0;
}

.field-row__value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  overflow-wrap: break-word;
}

.field-row__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  transform: translateY(-1px);
}

.state-ok .field-row__badge-dot,
.state-ok .field-row__value {
  color: var(--phosphor);
}
.state-ok .field-row__badge-dot {
  background: var(--phosphor);
}

.state-warn .field-row__badge-dot,
.state-warn .field-row__value {
  color: var(--amber);
}
.state-warn .field-row__badge-dot {
  background: var(--amber);
}

.state-error .field-row__badge-dot,
.state-error .field-row__value {
  color: var(--alarm);
}
.state-error .field-row__badge-dot {
  background: var(--alarm);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem 1rem;
}

.empty-state__trace {
  height: 40px;
  max-width: 240px;
  margin: 0 auto 1.25rem;
  opacity: 0.4;
}

.empty-state__trace svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: var(--ink-dim);
  stroke-width: 2;
}

.empty-state__body {
  margin: 0.35rem 0 0;
  color: var(--ink-dim);
  font-size: 0.9rem;
}

@media (min-width: 640px) {
  .wordmark {
    font-size: 2.2rem;
  }
}