System Indicator

<!-- System Indicator — shows that "auto" is following the OS preference -->
<div class="nuda-sysind">
  <div class="nuda-sysind__icon">
    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor"
         stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
      <rect x="3" y="5" width="18" height="14" rx="2" />
      <path d="M3 12 L21 12" />
    </svg>
  </div>
  <div class="nuda-sysind__info">
    <span class="nuda-sysind__label">System theme</span>
    <span class="nuda-sysind__value">Following <i>dark</i></span>
  </div>
  <span class="nuda-sysind__pulse"></span>
</div>

/* System Indicator
   Pill showing "auto" mode is active and which OS theme is currently mirrored.
   Customize: --sys-accent */

.nuda-sysind {
  --sys-accent: #e4ff54;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px 9px 10px;
  background: rgba(228, 255, 84, 0.06);
  border: 1px solid rgba(228, 255, 84, 0.2);
  border-radius: 10px;
  position: relative;
}

.nuda-sysind__icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(228, 255, 84, 0.12);
  color: var(--sys-accent);
  border-radius: 6px;
  flex-shrink: 0;
}

.nuda-sysind__icon svg { width: 15px; height: 15px; }

.nuda-sysind__info {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.nuda-sysind__label {
  font: 600 0.625rem ui-sans-serif, system-ui, sans-serif;
  color: #a1a1aa;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nuda-sysind__value {
  font: 700 0.875rem ui-sans-serif, system-ui, sans-serif;
  color: #fafafa;
  margin-top: 3px;
}

.nuda-sysind__value i {
  font-style: normal;
  color: var(--sys-accent);
  font-weight: 600;
}

.nuda-sysind__pulse {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--sys-accent);
  box-shadow: 0 0 6px var(--sys-accent);
}

.nuda-sysind__pulse::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--sys-accent);
  animation: nuda-sys-pulse 1.6s ease-out infinite;
}

@keyframes nuda-sys-pulse {
  0%   { transform: scale(1);   opacity: 0.6; }
  100% { transform: scale(2.6); opacity: 0;   }
}

@media (prefers-reduced-motion: reduce) {
  .nuda-sysind__pulse::after { animation: none; }
}