.speed-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.speed-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 1rem 0.5rem;
  background: #111a31;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.metric-label {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-value {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.metric-value.active {
  color: var(--success);
}

.metric-unit {
  color: var(--muted);
  font-size: 0.85rem;
}

.speed-start {
  width: min(280px, 100%);
}

.speed-start:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.speed-status {
  margin-top: 1rem;
  color: var(--muted);
  min-height: 1.4rem;
}

.speed-note {
  max-width: 640px;
  margin: 1.5rem auto 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 620px) {
  .speed-metrics {
    grid-template-columns: 1fr;
  }
}