/**
 * Componentes compartilhados — cards, alertas, badges, skeletons, empty states.
 * Classes novas (sc-*) + refinamentos leves em padrões existentes.
 */

/* Card base (opt-in) */
.sc-card {
  background: var(--surface, #fff);
  border: 1px solid var(--line);
  border-radius: var(--card-radius, var(--radius-md));
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
  transition:
    transform var(--transition-base) var(--ease-fluid),
    box-shadow var(--transition-base) var(--ease-fluid),
    border-color var(--transition-fast) ease;
}

.sc-card--interactive {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.sc-card--interactive:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(22, 46, 61, 0.14);
}

.sc-card--interactive.is-pressed,
.sc-card--interactive:active {
  transform: scale(0.985);
}

.sc-card__title {
  margin: 0 0 var(--space-2);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: var(--tracking-title-md);
  line-height: var(--lh-snug);
  color: var(--ink);
}

.sc-card__meta {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: var(--tracking-label);
}

.sc-card__body {
  margin: 0;
  color: var(--ink);
  line-height: var(--lh-body);
}

.sc-card__footer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-3);
}

/* Alertas */
.sc-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--surface, #fff);
  font-size: 0.9375rem;
  line-height: var(--lh-snug);
}

.sc-alert--info {
  border-color: rgba(0, 162, 237, 0.28);
  background: rgba(0, 162, 237, 0.08);
}

.sc-alert--success {
  border-color: rgba(22, 163, 74, 0.28);
  background: rgba(22, 163, 74, 0.08);
}

.sc-alert--error {
  border-color: rgba(220, 38, 38, 0.28);
  background: rgba(220, 38, 38, 0.08);
}

.sc-alert--warning {
  border-color: rgba(217, 119, 6, 0.3);
  background: rgba(251, 191, 36, 0.12);
}

/* Badge */
.sc-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 24px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  background: rgba(22, 46, 61, 0.08);
  color: var(--ink);
  white-space: nowrap;
}

.sc-badge--accent {
  background: rgba(0, 162, 237, 0.12);
  color: var(--accent, #00a2ed);
}

/* Skeleton */
.sc-skeleton {
  display: block;
  border-radius: var(--radius-sm);
  background: linear-gradient(
    90deg,
    rgba(22, 46, 61, 0.06) 0%,
    rgba(22, 46, 61, 0.12) 50%,
    rgba(22, 46, 61, 0.06) 100%
  );
  background-size: 200% 100%;
  animation: sc-shimmer 1.2s var(--ease-fluid) infinite;
}

.sc-skeleton--text {
  height: 0.875em;
  width: 100%;
}

.sc-skeleton--title {
  height: 1.15em;
  width: 55%;
}

.sc-skeleton--avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

.sc-skeleton--media {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
}

@keyframes sc-shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* Empty state */
.sc-empty {
  text-align: center;
  padding: var(--space-10) var(--space-4);
  color: var(--muted);
}

.sc-empty__title {
  margin: 0 0 var(--space-2);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: var(--tracking-title-md);
  color: var(--ink);
}

.sc-empty__text {
  margin: 0 auto;
  max-width: 36ch;
  line-height: var(--lh-body);
}

/* Live region helper */
.sc-live {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  .sc-skeleton {
    animation: none;
    background: rgba(22, 46, 61, 0.08);
  }

  .sc-card--interactive.is-pressed,
  .sc-card--interactive:active {
    transform: none;
  }
}