/**
 * SmartSwing AI — Skeleton loader primitives (S9 from audit).
 *
 * Give users visible feedback during JS hydration instead of blank panels.
 * Use one of these patterns:
 *
 *   <div class="ss-skeleton ss-skeleton--card"></div>
 *   <div class="ss-skeleton ss-skeleton--list-row"></div>
 *   <div class="ss-skeleton ss-skeleton--kpi"></div>
 *   <div class="ss-skeleton ss-skeleton--text" style="width:70%;"></div>
 *
 * Shimmer animation respects prefers-reduced-motion.
 * Colors adapt to both dark + light themes via CSS custom properties.
 */

:root {
  --ss-skeleton-bg:      rgba(255, 255, 255, 0.05);
  --ss-skeleton-shimmer: rgba(255, 255, 255, 0.08);
}

.ss-skeleton {
  position: relative;
  overflow: hidden;
  background: var(--ss-skeleton-bg);
  border-radius: 8px;
  /* Baseline animation — overridden by reduced-motion below */
  animation: ss-skeleton-pulse 1.6s ease-in-out infinite;
}

.ss-skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--ss-skeleton-shimmer) 50%,
    transparent 100%
  );
  animation: ss-skeleton-shimmer 1.6s linear infinite;
  transform: translateX(-100%);
}

@keyframes ss-skeleton-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.75; }
}

@keyframes ss-skeleton-shimmer {
  100% { transform: translateX(100%); }
}

/* ── Variants ──────────────────────────────────────────────────────────── */

.ss-skeleton--text {
  height: 14px;
  margin: 8px 0;
  border-radius: 4px;
}

.ss-skeleton--heading {
  height: 22px;
  margin: 10px 0 14px;
  width: 60%;
  border-radius: 6px;
}

.ss-skeleton--card {
  height: 120px;
  margin: 0 0 12px;
  border-radius: 14px;
}

.ss-skeleton--kpi {
  height: 96px;
  border-radius: 14px;
}

.ss-skeleton--list-row {
  height: 56px;
  margin: 0 0 10px;
  border-radius: 12px;
}

.ss-skeleton--thumb {
  width: 64px;
  height: 64px;
  border-radius: 10px;
  flex-shrink: 0;
}

.ss-skeleton--avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Helper to wrap a group of skeleton rows so they have consistent padding */
.ss-skeleton-group {
  padding: 8px 0;
}

/* Reduced motion — kill shimmer + pulse, keep the static placeholder visible */
@media (prefers-reduced-motion: reduce) {
  .ss-skeleton,
  .ss-skeleton::after {
    animation: none;
  }
}

/* Light-theme override (some pages use white bg) */
@media (prefers-color-scheme: light) {
  :root {
    --ss-skeleton-bg:      rgba(0, 0, 0, 0.06);
    --ss-skeleton-shimmer: rgba(0, 0, 0, 0.04);
  }
}