/* Attendance demo — signal chain, door, scan card */

.chain {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-2);
}

.chain__node {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3);
  border: var(--hair) solid var(--c-line);
  background: var(--c-bg-2);
}

.chain__node b {
  display: block;
  font-weight: 500;
  font-size: var(--fs-sm);
}

.chain__link {
  position: relative;
  block-size: 18px;
  margin-inline-start: calc(var(--s-3) + 3px);
  inline-size: 1px;
  background: var(--c-line-strong);
}

/* The pulse box spans the whole link; its dot travels by translating the box */
.chain__pulse {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.chain__pulse::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: -2px;
  inline-size: 5px;
  block-size: 5px;
  background: var(--c-accent-fill);
}

.chain__pulse.is-active {
  animation: pulse-v 0.5s var(--ease-in-out);
}

@keyframes pulse-v {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 1; transform: translateY(calc(100% - 5px)); }
}

@keyframes pulse-h {
  0% { opacity: 1; transform: translateX(0); }
  100% { opacity: 1; transform: translateX(calc(100% - 5px)); }
}

@media (min-width: 760px) {
  .chain {
    grid-template-columns: auto 1fr auto 1fr auto;
    align-items: center;
  }

  .chain__link {
    block-size: 1px;
    inline-size: auto;
    margin: 0;
  }

  .chain__pulse::before {
    inset-block-start: -2px;
    inset-inline-start: 0;
  }

  .chain__pulse.is-active {
    animation-name: pulse-h;
  }
}

.door {
  inline-size: 100%;
  max-inline-size: 280px;
  margin-inline: auto;
  fill: none;
  stroke: var(--c-ink-2);
  stroke-width: 1;
}

.door__frame {
  stroke: var(--c-line-strong);
}

.door__leaf {
  fill: var(--c-surface-2);
  transform-box: fill-box;
  transform-origin: left center;
  transition: transform 0.7s var(--ease-out);
}

.door__leaf.is-open {
  transform: scaleX(0.28);
}

.door__handle {
  fill: var(--c-ink-2);
}

.door__reader {
  fill: var(--c-bg-2);
}

.door__reader-led {
  fill: var(--c-faint);
  stroke: none;
  transition: fill 0.2s var(--ease-soft);
}

.door__reader-led.is-ok {
  fill: var(--c-accent-fill);
}

.door__reader-led.is-fault {
  fill: var(--c-fault);
}

.door__reader-lines,
.door__floor {
  stroke: var(--c-line-strong);
}

.scan {
  display: grid;
  gap: var(--s-1);
  padding: var(--s-3);
  border: var(--hair) solid var(--c-line);
  background: var(--c-bg-2);
}

.scan__name {
  font-family: var(--f-display);
  font-size: var(--fs-xl);
  line-height: 1.1;
}

.scan.is-fault .scan__name {
  color: var(--c-fault);
}

.badge {
  display: inline-block;
  padding: 0.05rem 0.4rem;
  font-size: var(--fs-2xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: var(--hair) solid var(--c-line-strong);
}

.badge--in {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.badge--late {
  border-color: var(--c-fault);
  color: var(--c-fault);
}

@media (prefers-reduced-motion: reduce) {
  .chain__pulse.is-active {
    animation: none;
    opacity: 1;
  }

  .door__leaf {
    transition: none;
  }
}