/* ==========================================================================
   ESA Design System
   Single source of truth for all ESA brand styling.
   Version: 1.0.0
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens (CSS Custom Properties)
   -------------------------------------------------------------------------- */

:root {
  /* Brand Colors */
  --esa-primary: #2176C9;
  --esa-primary-dark: #004A99;
  --esa-primary-light: #4A9AE5;
  --esa-primary-bg: #EBF3FB;
  --esa-accent: #FD7E14;
  --esa-accent-light: #FFB366;
  --esa-accent-bg: #FFF3E6;
  --esa-success: #22C55E;
  --esa-success-bg: #DCFCE7;
  --esa-warning: #F9B931;
  --esa-warning-bg: #FEF9C3;
  --esa-danger: #EF4444;
  --esa-danger-bg: #FEE2E2;
  --esa-info: #4ECAC2;
  --esa-info-bg: #D1FAE5;

  /* Neutral Colors */
  --esa-text: #313B5E;
  --esa-text-secondary: #5D7186;
  --esa-text-light: #8486A7;
  --esa-border: #EAEDF1;
  --esa-border-light: #F0F2F5;
  --esa-bg: #F9F7F7;
  --esa-surface: #FFFFFF;
  --esa-gray-50: #F8F9FA;
  --esa-gray-100: #EEF2F7;

  /* Spacing */
  --esa-space-xs: 4px;
  --esa-space-sm: 8px;
  --esa-space-md: 16px;
  --esa-space-lg: 24px;
  --esa-space-xl: 32px;

  /* Radius */
  --esa-radius-sm: 6px;
  --esa-radius-md: 10px;
  --esa-radius-lg: 16px;
  --esa-radius-pill: 100px;

  /* Shadows */
  --esa-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --esa-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --esa-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Typography */
  --esa-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --esa-font-size-xs: 0.75rem;
  --esa-font-size-sm: 0.8125rem;
  --esa-font-size-base: 0.875rem;
  --esa-font-size-lg: 1rem;
  --esa-font-size-xl: 1.25rem;
  --esa-font-size-2xl: 1.5rem;
  --esa-font-size-3xl: 2rem;

  /* Transitions */
  --esa-transition-fast: 150ms ease;
  --esa-transition-base: 250ms ease;
  --esa-transition-slow: 350ms ease;
}


/* --------------------------------------------------------------------------
   2. Accessibility
   -------------------------------------------------------------------------- */

/* Skip link — hidden until focused */
.esa-skip-link {
  position: absolute;
  top: -100%;
  left: var(--esa-space-md);
  z-index: 10000;
  padding: var(--esa-space-sm) var(--esa-space-md);
  background: var(--esa-primary);
  color: #fff;
  font-weight: 600;
  font-size: var(--esa-font-size-sm);
  border-radius: 0 0 var(--esa-radius-sm) var(--esa-radius-sm);
  text-decoration: none;
  transition: top var(--esa-transition-fast);
}

.esa-skip-link:focus {
  top: 0;
  outline: 2px solid var(--esa-accent);
  outline-offset: 2px;
}

/* Screen-reader only — visually hidden but accessible */
.esa-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;
}

/* Global focus-visible outlines for interactive elements */
.esa-btn-primary:focus-visible,
.esa-btn-accent:focus-visible,
.esa-btn-outline:focus-visible,
.esa-btn-danger:focus-visible,
.esa-input:focus-visible,
a:focus-visible,
button:focus-visible,
select:focus-visible,
textarea:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--esa-primary-light);
  outline-offset: 2px;
}


/* --------------------------------------------------------------------------
   3. Buttons
   -------------------------------------------------------------------------- */

/* Shared button base */
.esa-btn-primary,
.esa-btn-accent,
.esa-btn-outline,
.esa-btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--esa-space-sm);
  padding: 10px 22px;
  font-family: var(--esa-font-family);
  font-size: var(--esa-font-size-base);
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--esa-radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color var(--esa-transition-fast),
    border-color var(--esa-transition-fast),
    box-shadow var(--esa-transition-fast),
    transform var(--esa-transition-fast);
  user-select: none;
}

.esa-btn-primary:active,
.esa-btn-accent:active,
.esa-btn-outline:active,
.esa-btn-danger:active {
  transform: translateY(1px);
}

/* Primary button */
.esa-btn-primary {
  background-color: var(--esa-primary);
  color: #fff;
  border-color: var(--esa-primary);
}

.esa-btn-primary:hover {
  background-color: var(--esa-primary-dark);
  border-color: var(--esa-primary-dark);
}

/* Accent button */
.esa-btn-accent {
  background-color: var(--esa-accent);
  color: #fff;
  border-color: var(--esa-accent);
}

.esa-btn-accent:hover {
  background-color: #e06b00;
  border-color: #e06b00;
}

/* Outline button */
.esa-btn-outline {
  background-color: transparent;
  color: var(--esa-primary);
  border-color: var(--esa-primary);
}

.esa-btn-outline:hover {
  background-color: var(--esa-primary);
  color: #fff;
}

/* Danger button */
.esa-btn-danger {
  background-color: var(--esa-danger);
  color: #fff;
  border-color: var(--esa-danger);
}

.esa-btn-danger:hover {
  background-color: #dc2626;
  border-color: #dc2626;
}

/* Disabled state for all buttons */
.esa-btn-primary:disabled,
.esa-btn-accent:disabled,
.esa-btn-outline:disabled,
.esa-btn-danger:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* Loading state */
.esa-btn-loading {
  position: relative;
  pointer-events: none;
  color: transparent !important;
}

.esa-btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  margin-top: -9px;
  margin-left: -9px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: esa-spin 0.6s linear infinite;
}

.esa-btn-outline.esa-btn-loading::after {
  border-color: rgba(33, 118, 201, 0.25);
  border-top-color: var(--esa-primary);
}


/* --------------------------------------------------------------------------
   4. Cards
   -------------------------------------------------------------------------- */

.esa-card {
  background: var(--esa-surface);
  border: 1px solid var(--esa-border);
  border-radius: var(--esa-radius-lg);
  box-shadow: var(--esa-shadow-sm);
  padding: var(--esa-space-lg);
}

.esa-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--esa-space-md);
  padding-bottom: var(--esa-space-md);
  border-bottom: 1px solid var(--esa-border-light);
}

.esa-card-header h2,
.esa-card-header h3,
.esa-card-header h4 {
  margin: 0;
  font-size: var(--esa-font-size-lg);
  font-weight: 600;
  color: var(--esa-text);
}

.esa-card-body {
  color: var(--esa-text);
}

.esa-card-footer {
  margin-top: var(--esa-space-md);
  padding-top: var(--esa-space-md);
  border-top: 1px solid var(--esa-border-light);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--esa-space-sm);
}


/* --------------------------------------------------------------------------
   5. Badges
   -------------------------------------------------------------------------- */

/* Shared badge base */
.esa-badge-pending,
.esa-badge-confirmed,
.esa-badge-processing,
.esa-badge-shipped,
.esa-badge-delivered,
.esa-badge-cancelled,
.esa-badge-paid {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  font-size: var(--esa-font-size-xs);
  font-weight: 600;
  letter-spacing: 0.025em;
  border-radius: var(--esa-radius-pill);
  white-space: nowrap;
  line-height: 1.6;
}

/* Individual badge variants */
.esa-badge-pending {
  background-color: var(--esa-warning-bg);
  color: #92400E;
}

.esa-badge-confirmed {
  background-color: var(--esa-info-bg);
  color: #065F46;
}

.esa-badge-processing {
  background-color: var(--esa-primary-bg);
  color: var(--esa-primary-dark);
}

.esa-badge-shipped {
  background-color: #F3E8FF;
  color: #6B21A8;
}

.esa-badge-delivered {
  background-color: var(--esa-success-bg);
  color: #166534;
}

.esa-badge-cancelled {
  background-color: var(--esa-danger-bg);
  color: #991B1B;
}

.esa-badge-paid {
  background-color: var(--esa-success-bg);
  color: #166534;
}


/* --------------------------------------------------------------------------
   6. Tables
   -------------------------------------------------------------------------- */

.esa-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--esa-font-size-base);
  color: var(--esa-text);
}

.esa-table thead th {
  background-color: var(--esa-gray-50);
  color: var(--esa-text-secondary);
  font-weight: 600;
  font-size: var(--esa-font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 12px var(--esa-space-md);
  border-bottom: 1px solid var(--esa-border);
  text-align: left;
  white-space: nowrap;
}

.esa-table thead th:first-child {
  border-top-left-radius: var(--esa-radius-md);
}

.esa-table thead th:last-child {
  border-top-right-radius: var(--esa-radius-md);
}

.esa-table tbody td {
  padding: 12px var(--esa-space-md);
  border-bottom: 1px solid var(--esa-border-light);
  vertical-align: middle;
}

.esa-table tbody tr:hover {
  background-color: var(--esa-gray-50);
}

.esa-table tbody tr:last-child td {
  border-bottom: none;
}

.esa-table tbody tr:last-child td:first-child {
  border-bottom-left-radius: var(--esa-radius-md);
}

.esa-table tbody tr:last-child td:last-child {
  border-bottom-right-radius: var(--esa-radius-md);
}

/* Responsive table wrapper */
.esa-table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
  .esa-table-responsive .esa-table thead {
    display: none;
  }

  .esa-table-responsive .esa-table tbody tr {
    display: block;
    margin-bottom: var(--esa-space-md);
    background: var(--esa-surface);
    border: 1px solid var(--esa-border);
    border-radius: var(--esa-radius-md);
    box-shadow: var(--esa-shadow-sm);
  }

  .esa-table-responsive .esa-table tbody td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px var(--esa-space-md);
    border-bottom: 1px solid var(--esa-border-light);
    text-align: right;
  }

  .esa-table-responsive .esa-table tbody td::before {
    content: attr(data-label);
    font-weight: 600;
    font-size: var(--esa-font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--esa-text-secondary);
    text-align: left;
    margin-right: var(--esa-space-md);
    flex-shrink: 0;
  }

  .esa-table-responsive .esa-table tbody td:last-child {
    border-bottom: none;
  }
}


/* --------------------------------------------------------------------------
   7. Empty State
   -------------------------------------------------------------------------- */

.esa-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--esa-space-xl) var(--esa-space-md);
  min-height: 200px;
}

.esa-empty-state-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--esa-gray-100);
  border-radius: 50%;
  margin-bottom: var(--esa-space-md);
  color: var(--esa-text-light);
  font-size: var(--esa-font-size-2xl);
}

.esa-empty-state-title {
  margin: 0 0 var(--esa-space-xs);
  font-size: var(--esa-font-size-lg);
  font-weight: 600;
  color: var(--esa-text);
}

.esa-empty-state-subtitle {
  margin: 0;
  font-size: var(--esa-font-size-base);
  color: var(--esa-text-light);
  max-width: 340px;
}


/* --------------------------------------------------------------------------
   8. Loading Overlay & Skeleton
   -------------------------------------------------------------------------- */

/* Full-section overlay */
.esa-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.75);
  z-index: 50;
  border-radius: inherit;
}

.esa-loading-overlay::after {
  content: '';
  width: 32px;
  height: 32px;
  border: 3px solid var(--esa-border);
  border-top-color: var(--esa-primary);
  border-radius: 50%;
  animation: esa-spin 0.65s linear infinite;
}

/* Skeleton shimmer */
.esa-skeleton {
  position: relative;
  overflow: hidden;
  background: var(--esa-gray-100);
  border-radius: var(--esa-radius-sm);
  color: transparent !important;
}

.esa-skeleton * {
  visibility: hidden;
}

.esa-skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.55) 50%,
    transparent 100%
  );
  animation: esa-shimmer 1.5s ease-in-out infinite;
}

@keyframes esa-shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}


/* --------------------------------------------------------------------------
   9. Inputs
   -------------------------------------------------------------------------- */

.esa-input {
  display: block;
  width: 100%;
  padding: 10px 14px;
  font-family: var(--esa-font-family);
  font-size: var(--esa-font-size-base);
  color: var(--esa-text);
  background: var(--esa-surface);
  border: 1px solid var(--esa-border);
  border-radius: var(--esa-radius-sm);
  transition:
    border-color var(--esa-transition-fast),
    box-shadow var(--esa-transition-fast);
  outline: none;
}

.esa-input::placeholder {
  color: var(--esa-text-light);
}

.esa-input:hover {
  border-color: var(--esa-primary-light);
}

.esa-input:focus {
  border-color: var(--esa-primary);
  box-shadow: 0 0 0 3px rgba(33, 118, 201, 0.15);
}

.esa-input:disabled {
  background: var(--esa-gray-50);
  cursor: not-allowed;
  opacity: 0.65;
}

.esa-input.is-invalid {
  border-color: var(--esa-danger);
}

.esa-input.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}


/* --------------------------------------------------------------------------
   10. Stat Card (KPI)
   -------------------------------------------------------------------------- */

.esa-stat-card {
  display: flex;
  align-items: center;
  gap: var(--esa-space-md);
  background: var(--esa-surface);
  border: 1px solid var(--esa-border);
  border-radius: var(--esa-radius-lg);
  box-shadow: var(--esa-shadow-sm);
  padding: var(--esa-space-lg);
}

.esa-stat-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--esa-primary-bg);
  color: var(--esa-primary);
  border-radius: var(--esa-radius-md);
  font-size: var(--esa-font-size-xl);
  flex-shrink: 0;
}

.esa-stat-card-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.esa-stat-card-value {
  font-size: var(--esa-font-size-2xl);
  font-weight: 700;
  color: var(--esa-text);
  line-height: 1.2;
}

.esa-stat-card-label {
  font-size: var(--esa-font-size-sm);
  color: var(--esa-text-secondary);
  margin-top: 2px;
}

/* Stat change indicator */
.esa-stat-change {
  font-size: var(--esa-font-size-xs);
  font-weight: 500;
  margin-top: 4px;
}

.esa-stat-change--up {
  color: var(--esa-success);
}

.esa-stat-change--down {
  color: var(--esa-danger);
}

.esa-stat-change--flat {
  color: var(--esa-text-light);
}


/* --------------------------------------------------------------------------
   11. Price Display
   -------------------------------------------------------------------------- */

.esa-price {
  font-weight: 700;
  color: var(--esa-primary);
  font-size: var(--esa-font-size-lg);
}

.esa-price-original {
  text-decoration: line-through;
  color: var(--esa-text-light);
  font-size: var(--esa-font-size-sm);
  font-weight: 400;
  margin-left: var(--esa-space-xs);
}

.esa-discount-badge {
  display: inline-block;
  background: var(--esa-accent);
  color: #fff;
  font-size: var(--esa-font-size-xs);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--esa-radius-pill);
  margin-left: var(--esa-space-sm);
  vertical-align: middle;
}


/* --------------------------------------------------------------------------
   12. Utility Classes
   -------------------------------------------------------------------------- */

/* Text colors */
.esa-text-primary   { color: var(--esa-primary) !important; }
.esa-text-accent    { color: var(--esa-accent) !important; }
.esa-text-success   { color: var(--esa-success) !important; }
.esa-text-warning   { color: var(--esa-warning) !important; }
.esa-text-danger    { color: var(--esa-danger) !important; }
.esa-text-info      { color: var(--esa-info) !important; }
.esa-text-secondary { color: var(--esa-text-secondary) !important; }
.esa-text-light     { color: var(--esa-text-light) !important; }

/* Background colors */
.esa-bg-primary { background-color: var(--esa-primary-bg) !important; }
.esa-bg-accent  { background-color: var(--esa-accent-bg) !important; }
.esa-bg-success { background-color: var(--esa-success-bg) !important; }
.esa-bg-warning { background-color: var(--esa-warning-bg) !important; }
.esa-bg-danger  { background-color: var(--esa-danger-bg) !important; }
.esa-bg-info    { background-color: var(--esa-info-bg) !important; }
.esa-bg-surface { background-color: var(--esa-surface) !important; }

/* Spacing helpers */
.esa-mt-0  { margin-top: 0 !important; }
.esa-mt-xs { margin-top: var(--esa-space-xs) !important; }
.esa-mt-sm { margin-top: var(--esa-space-sm) !important; }
.esa-mt-md { margin-top: var(--esa-space-md) !important; }
.esa-mt-lg { margin-top: var(--esa-space-lg) !important; }
.esa-mt-xl { margin-top: var(--esa-space-xl) !important; }

.esa-mb-0  { margin-bottom: 0 !important; }
.esa-mb-xs { margin-bottom: var(--esa-space-xs) !important; }
.esa-mb-sm { margin-bottom: var(--esa-space-sm) !important; }
.esa-mb-md { margin-bottom: var(--esa-space-md) !important; }
.esa-mb-lg { margin-bottom: var(--esa-space-lg) !important; }
.esa-mb-xl { margin-bottom: var(--esa-space-xl) !important; }

.esa-p-0  { padding: 0 !important; }
.esa-p-xs { padding: var(--esa-space-xs) !important; }
.esa-p-sm { padding: var(--esa-space-sm) !important; }
.esa-p-md { padding: var(--esa-space-md) !important; }
.esa-p-lg { padding: var(--esa-space-lg) !important; }
.esa-p-xl { padding: var(--esa-space-xl) !important; }

/* Display helpers */
.esa-d-flex        { display: flex !important; }
.esa-d-inline-flex { display: inline-flex !important; }
.esa-d-block       { display: block !important; }
.esa-d-none        { display: none !important; }
.esa-flex-center    { align-items: center; justify-content: center; }
.esa-flex-between   { align-items: center; justify-content: space-between; }
.esa-gap-xs { gap: var(--esa-space-xs) !important; }
.esa-gap-sm { gap: var(--esa-space-sm) !important; }
.esa-gap-md { gap: var(--esa-space-md) !important; }
.esa-gap-lg { gap: var(--esa-space-lg) !important; }

/* Border radius */
.esa-rounded-sm   { border-radius: var(--esa-radius-sm) !important; }
.esa-rounded-md   { border-radius: var(--esa-radius-md) !important; }
.esa-rounded-lg   { border-radius: var(--esa-radius-lg) !important; }
.esa-rounded-pill { border-radius: var(--esa-radius-pill) !important; }

/* Shadows */
.esa-shadow-sm { box-shadow: var(--esa-shadow-sm) !important; }
.esa-shadow-md { box-shadow: var(--esa-shadow-md) !important; }
.esa-shadow-lg { box-shadow: var(--esa-shadow-lg) !important; }

/* Truncate text */
.esa-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Divider */
.esa-divider {
  border: none;
  border-top: 1px solid var(--esa-border);
  margin: var(--esa-space-md) 0;
}


/* --------------------------------------------------------------------------
   13. Animations (shared keyframes)
   -------------------------------------------------------------------------- */

@keyframes esa-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes esa-fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.esa-animate-fade-in {
  animation: esa-fade-in 0.3s ease forwards;
}


/* --------------------------------------------------------------------------
   14. Print Styles
   -------------------------------------------------------------------------- */

@media print {
  .esa-btn-primary,
  .esa-btn-accent,
  .esa-btn-outline,
  .esa-btn-danger,
  .esa-loading-overlay,
  .esa-skip-link {
    display: none !important;
  }

  .esa-card {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }

  .esa-table tbody tr:hover {
    background: none;
  }
}

/* --------------------------------------------------------------------------
   16. Shop Container
   -------------------------------------------------------------------------- */
.shop-container {
  max-width: 1400px !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: 24px !important;
  padding-right: 24px !important;
}

@media (min-width: 1600px) {
  .shop-container {
    padding-left: 48px !important;
    padding-right: 48px !important;
  }
}

@media (max-width: 767px) {
  .shop-container {
    padding-left: 12px !important;
    padding-right: 12px !important;
  }
}