/**
 * =========================================================================
 * THE CLUB 777° — GLOBAL LOADING SKELETON DESIGN SYSTEM
 * =========================================================================
 * Production-ready, mobile-responsive, 100% local CSS skeleton loaders.
 * Features restrained shimmer animation, WCAG contrast, accessible aria-busy,
 * and seamless adaptability across all application modules.
 */

/* ─── 1. Base Shimmer Primitive & Tokens ───────────────────────── */
:root {
  --sk-bg: #F1F5F9;
  --sk-shimmer: #E2E8F0;
  --sk-highlight: #F8FAFC;
  --sk-radius-sm: 6px;
  --sk-radius-md: 10px;
  --sk-radius-lg: 14px;
  --sk-radius-full: 9999px;
  --sk-speed: 1.5s;
}

/* Base skeleton block with fluid gradient shimmer */
.skeleton-box,
.sk-box {
  display: block;
  background-color: var(--sk-bg);
  background-image: linear-gradient(
    90deg,
    var(--sk-bg) 0%,
    var(--sk-shimmer) 40%,
    var(--sk-highlight) 50%,
    var(--sk-shimmer) 60%,
    var(--sk-bg) 100%
  );
  background-size: 200% 100%;
  animation: skeletonShimmer var(--sk-speed) infinite linear;
  border-radius: var(--sk-radius-sm);
  box-sizing: border-box;
  pointer-events: none;
  user-select: none;
}

@keyframes skeletonShimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Accessible Reduced-Motion Mode */
@media (prefers-reduced-motion: reduce) {
  .skeleton-box,
  .sk-box,
  .skeleton-shimmer {
    animation: skeletonPulse 2s ease-in-out infinite !important;
    background-image: none !important;
  }
}

@keyframes skeletonPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ─── 2. Text & Typography Skeletons ──────────────────────────── */
.skeleton-text {
  height: 14px;
  width: 100%;
  margin-bottom: 8px;
  border-radius: 4px;
}

.skeleton-text:last-child {
  margin-bottom: 0;
}

.skeleton-text-xs { height: 10px; }
.skeleton-text-sm { height: 12px; }
.skeleton-text-md { height: 16px; }
.skeleton-text-lg { height: 20px; }

.skeleton-heading {
  height: 24px;
  width: 60%;
  margin-bottom: 12px;
  border-radius: 6px;
}

.skeleton-heading-lg {
  height: 32px;
  width: 75%;
  margin-bottom: 16px;
  border-radius: 8px;
}

/* Line length modifiers */
.w-25 { width: 25% !important; }
.w-33 { width: 33% !important; }
.w-50 { width: 50% !important; }
.w-66 { width: 66% !important; }
.w-75 { width: 75% !important; }
.w-80 { width: 80% !important; }
.w-90 { width: 90% !important; }
.w-100 { width: 100% !important; }

/* ─── 3. Avatar, Badge & Button Skeletons ──────────────────────── */
.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--sk-radius-full);
  flex-shrink: 0;
}

.skeleton-avatar-sm { width: 32px; height: 32px; }
.skeleton-avatar-lg { width: 64px; height: 64px; }
.skeleton-avatar-xl { width: 88px; height: 88px; }

.skeleton-badge {
  height: 20px;
  width: 64px;
  border-radius: var(--sk-radius-full);
  display: inline-block;
}

.skeleton-btn {
  height: 38px;
  width: 110px;
  border-radius: var(--sk-radius-md);
  display: inline-block;
}

.skeleton-btn-sm { height: 32px; width: 80px; }
.skeleton-btn-lg { height: 46px; width: 140px; }

/* ─── 4. KPI & Statistics Card Skeletons ───────────────────────── */
.skeleton-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  width: 100%;
}

.skeleton-kpi-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color, #E2E8F0);
  border-radius: var(--sk-radius-lg);
  padding: 1.25rem 1.35rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-sizing: border-box;
}

.skeleton-kpi-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skeleton-kpi-val {
  height: 32px;
  width: 60%;
  border-radius: 6px;
}

.skeleton-kpi-sub {
  height: 12px;
  width: 80%;
  border-radius: 4px;
}

/* ─── 5. Data Table Row & Grid Skeletons ───────────────────────── */
.skeleton-table-wrapper {
  background: #FFFFFF;
  border: 1px solid var(--border-color, #E2E8F0);
  border-radius: var(--sk-radius-lg);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  width: 100%;
  box-sizing: border-box;
}

.skeleton-table-header {
  display: flex;
  align-items: center;
  padding: 0.85rem 1.25rem;
  background: #F8FAFC;
  border-bottom: 1px solid var(--border-color, #E2E8F0);
  gap: 1rem;
}

.skeleton-table-row {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid #F1F5F9;
  gap: 1rem;
  box-sizing: border-box;
}

.skeleton-table-row:last-child {
  border-bottom: none;
}

.skeleton-cell {
  flex: 1;
  height: 14px;
  border-radius: 4px;
}

.skeleton-cell-shrink {
  flex: 0 0 auto;
}

/* ─── 6. Member Card & Directory Skeletons ─────────────────────── */
.skeleton-member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  width: 100%;
}

.skeleton-member-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color, #E2E8F0);
  border-radius: var(--sk-radius-lg);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  box-sizing: border-box;
}

.skeleton-member-card-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.skeleton-member-card-meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.skeleton-member-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.65rem 0;
  border-top: 1px solid #F1F5F9;
  border-bottom: 1px solid #F1F5F9;
}

.skeleton-member-card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

/* ─── 7. POS Catalog Product & Cart Skeletons ──────────────────── */
.skeleton-product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.85rem;
  width: 100%;
}

.skeleton-product-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color, #E2E8F0);
  border-radius: var(--sk-radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  box-sizing: border-box;
}

.skeleton-product-img {
  width: 100%;
  height: 80px;
  border-radius: var(--sk-radius-sm);
}

.skeleton-category-pills {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.skeleton-pill {
  height: 36px;
  width: 100px;
  border-radius: var(--sk-radius-full);
  flex-shrink: 0;
}

/* ─── 8. Chart & Analytics Skeletons ───────────────────────────── */
.skeleton-chart-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color, #E2E8F0);
  border-radius: var(--sk-radius-lg);
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
  box-sizing: border-box;
}

.skeleton-chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skeleton-chart-bars-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  height: 220px;
  padding: 1rem 0;
  gap: 0.75rem;
  border-bottom: 2px solid var(--border-color, #E2E8F0);
}

.skeleton-chart-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  height: 100%;
  justify-content: flex-end;
}

.skeleton-chart-bar {
  width: 100%;
  max-width: 42px;
  border-radius: 4px 4px 0 0;
}

.skeleton-chart-legend {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

/* ─── 9. Form Field & Modal Skeletons ──────────────────────────── */
.skeleton-form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1rem;
  width: 100%;
}

.skeleton-label {
  height: 12px;
  width: 35%;
  border-radius: 4px;
}

.skeleton-input {
  height: 42px;
  width: 100%;
  border-radius: var(--sk-radius-md);
}

.skeleton-modal-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color, #E2E8F0);
  border-radius: var(--sk-radius-lg);
  padding: 1.75rem;
  max-width: 540px;
  width: 90%;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-sizing: border-box;
}

/* ─── 10. Notification List Skeletons ──────────────────────────── */
.skeleton-notif-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid #F1F5F9;
  align-items: flex-start;
  box-sizing: border-box;
}

.skeleton-notif-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* ─── 11. Member Profile 360° Hero Skeleton ────────────────────── */
.skeleton-profile-hero {
  background: #FFFFFF;
  border: 1px solid var(--border-color, #E2E8F0);
  border-radius: var(--sk-radius-lg);
  padding: 1.75rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  box-sizing: border-box;
}

.skeleton-profile-hero-meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.skeleton-tab-bar {
  display: flex;
  gap: 0.5rem;
  border-bottom: 2px solid var(--border-color, #E2E8F0);
  margin-bottom: 1.5rem;
  padding-bottom: 0.25rem;
  overflow-x: auto;
}

/* ─── 12. Full-Page & Dashboard Layout Skeletons ───────────────── */
.skeleton-dashboard-shell {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
}

.skeleton-page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ─── 13. State Transitions & Empty/Error States ──────────────── */
.sk-fade-enter {
  animation: skFadeIn 0.25s ease-out forwards;
}

@keyframes skFadeIn {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Standardized Empty State Component */
.empty-state-card {
  text-align: center;
  padding: 3rem 1.5rem;
  background: #FFFFFF;
  border: 1px dashed var(--border-color, #CBD5E1);
  border-radius: var(--sk-radius-lg);
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  box-sizing: border-box;
}

.empty-state-icon {
  font-size: 2.5rem;
  line-height: 1;
  margin-bottom: 0.35rem;
  color: var(--text-muted, #64748B);
}

.empty-state-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary, #0F172A);
  margin: 0;
}

.empty-state-desc {
  font-size: 0.85rem;
  color: var(--text-muted, #64748B);
  max-width: 420px;
  margin: 0;
  line-height: 1.45;
}

/* Standardized Error State Component with Retry Action */
.error-state-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--sk-radius-lg);
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  box-sizing: border-box;
}

.error-state-icon {
  font-size: 2.25rem;
  line-height: 1;
  color: #DC2626;
}

.error-state-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #991B1B;
  margin: 0;
}

.error-state-desc {
  font-size: 0.82rem;
  color: #B91C1C;
  max-width: 440px;
  margin: 0;
  line-height: 1.4;
}

.btn-retry {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: #DC2626;
  color: #FFFFFF;
  border: 1px solid #B91C1C;
  padding: 0.5rem 1.15rem;
  border-radius: var(--sk-radius-md);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.25);
}

.btn-retry:hover {
  background: #B91C1C;
}

/* Accessibility screen-reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─── 14. Responsive Layout Breakpoints ───────────────────────── */
@media (max-width: 768px) {
  .skeleton-kpi-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .skeleton-profile-hero {
    flex-direction: column;
    text-align: center;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
  }

  .skeleton-profile-hero-meta {
    align-items: center;
  }

  .skeleton-product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
  }

  .skeleton-table-row {
    padding: 0.85rem;
    gap: 0.65rem;
  }

  .skeleton-chart-bars-wrap {
    height: 160px;
    gap: 0.45rem;
  }
}

@media (max-width: 480px) {
  .skeleton-product-grid {
    grid-template-columns: 1fr;
  }

  .skeleton-chart-bars-wrap {
    height: 130px;
  }
}