/* =============================================================
   刀具管理系统 v5 — Design System
   工厂 ERP 离线设计系统，兼容 Bootstrap 5
   ============================================================= */

@layer design-system {

/* =============================================================
   1. CSS Custom Properties — Default (Main System / Navy)
   ============================================================= */
:root {
  /* --- Semantic Colors --- */
  --color-bg:              #f4f6f9;
  --color-surface:         #ffffff;
  --color-border:          #e2e8f0;
  --color-border-light:    #edf2f7;
  --color-text-primary:    #1e293b;
  --color-text-secondary:  #64748b;
  --color-text-muted:      #94a3b8;
  --color-link:            #2563eb;

  /* --- Status Colors --- */
  --color-danger:          #dc2626;
  --color-warning:         #ea580c;
  --color-success:         #16a34a;
  --color-info:            #0891b2;

  --color-danger-bg:       #fef2f2;
  --color-warning-bg:      #fff7ed;
  --color-success-bg:      #f0fdf4;
  --color-info-bg:         #ecfeff;

  --color-danger-border:   #fecaca;
  --color-warning-border:  #fed7aa;
  --color-success-border:  #bbf7d0;
  --color-info-border:     #a5f3fc;

  --color-danger-text:     #991b1b;
  --color-warning-text:    #9a3412;
  --color-success-text:    #166534;
  --color-info-text:       #115e59;

  /* --- Brand Colors (Main System — Navy / Blue) --- */
  --brand-50:   #eff6ff;
  --brand-100:  #dbeafe;
  --brand-200:  #bfdbfe;
  --brand-300:  #93c5fd;
  --brand-400:  #60a5fa;
  --brand-500:  #3b82f6;
  --brand-600:  #2563eb;
  --brand-700:  #1d4ed8;
  --brand-800:  #1e3a5c;
  --brand-900:  #0f1d36;
  --brand-950:  #0a1424;

  --sidebar-bg-start:     #1e3a5c;
  --sidebar-bg-end:       #0f1d36;
  --sidebar-bg:           linear-gradient(180deg, var(--sidebar-bg-start) 0%, var(--sidebar-bg-end) 100%);
  --sidebar-width:        220px;
  --sidebar-hover:        rgba(255, 255, 255, 0.08);
  --sidebar-active:       rgba(59, 130, 246, 0.25);
  --sidebar-text:         rgba(255, 255, 255, 0.82);
  --sidebar-text-muted:   rgba(255, 255, 255, 0.45);
  --sidebar-divider:      rgba(255, 255, 255, 0.08);

  --page-title-color:     var(--brand-800);
  --accent-color:         var(--brand-500);
  --accent-hover:         var(--brand-600);
  --accent-subtle:        var(--brand-100);

  /* --- Card Accent --- */
  --card-accent:          var(--brand-500);
  --stat-icon-color:      var(--brand-500);

  /* --- Table Row Hover Tint --- */
  --table-row-hover:      rgba(59, 130, 246, 0.04);
  --table-row-stripe:     rgba(241, 245, 249, 0.6);

  /* --- Typography --- */
  --font-sans:  'Segoe UI', 'Microsoft YaHei', 'PingFang SC', system-ui, -apple-system, sans-serif;
  --font-mono:  'Cascadia Code', 'Consolas', 'Courier New', monospace;

  --text-xs:    0.75rem;     /* 10.5px */
  --text-sm:    0.857rem;    /* 12px */
  --text-base:  1rem;        /* 14px */
  --text-md:    1.071rem;    /* 15px */
  --text-lg:    1.286rem;    /* 18px */
  --text-xl:    1.571rem;    /* 22px */
  --text-2xl:   2rem;        /* 28px */
  --text-3xl:   2.571rem;    /* 36px */

  --font-normal:    400;
  --font-medium:    500;
  --font-semibold:  600;
  --font-bold:      700;

  --leading-tight:  1.25;
  --leading-normal: 1.5;
  --leading-relaxed:1.625;

  /* --- Spacing (4px base) --- */
  --space-0:   0;
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;

  /* --- Shadows --- */
  --shadow-none:    none;
  --shadow-xs:      0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm:      0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md:      0 4px 6px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg:      0 10px 15px rgba(0, 0, 0, 0.06), 0 4px 6px rgba(0, 0, 0, 0.04);
  --shadow-xl:      0 20px 25px rgba(0, 0, 0, 0.08), 0 8px 10px rgba(0, 0, 0, 0.04);
  --shadow-sidebar: 2px 0 16px rgba(0, 0, 0, 0.18);

  /* --- Border Radius --- */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-fast:     150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:     200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:     300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-ease-out: 200ms cubic-bezier(0, 0, 0.2, 1);

  /* --- Data Table --- */
  --table-header-bg:      #f8fafc;
  --table-header-color:   var(--color-text-secondary);
  --table-header-weight:  var(--font-semibold);
  --table-header-size:    var(--text-xs);
  --table-border-color:   var(--color-border-light);
  --table-row-size:       var(--text-sm);
  --table-sticky-z:       2;
  --table-header-z:       3;
  --table-corner-z:       4;

  /* --- Scrollbar --- */
  --scrollbar-track:      transparent;
  --scrollbar-thumb:      rgba(148, 163, 184, 0.4);
  --scrollbar-thumb-hover:rgba(148, 163, 184, 0.6);
  --scrollbar-width:      6px;

  /* --- Top Nav --- */
  --topbar-bg:            #ffffff;
  --topbar-border:        var(--color-border);
  --topbar-height:        52px;

  /* --- Misc --- */
  --focus-ring:           0 0 0 3px rgba(59, 130, 246, 0.25);
}


/* =============================================================
   2. Vendor Theme Overrides (Purple)
   ============================================================= */
.vendor-theme {
  --sidebar-bg-start:     #3a1c5c;
  --sidebar-bg-end:       #1a0d2e;
  --sidebar-bg:           linear-gradient(180deg, var(--sidebar-bg-start) 0%, var(--sidebar-bg-end) 100%);
  --sidebar-active:       rgba(168, 85, 247, 0.25);
  --sidebar-hover:        rgba(255, 255, 255, 0.06);

  --brand-50:   #faf5ff;
  --brand-100:  #f3e8ff;
  --brand-200:  #e9d5ff;
  --brand-300:  #d8b4fe;
  --brand-400:  #c084fc;
  --brand-500:  #a855f7;
  --brand-600:  #9333ea;
  --brand-700:  #7c3aed;
  --brand-800:  #3a1c5c;
  --brand-900:  #1a0d2e;
  --brand-950:  #0f071a;

  --page-title-color:     var(--brand-800);
  --accent-color:         var(--brand-500);
  --accent-hover:         var(--brand-600);
  --accent-subtle:        var(--brand-100);
  --card-accent:          var(--brand-500);
  --stat-icon-color:      var(--brand-500);
  --table-row-hover:      rgba(168, 85, 247, 0.04);
  --focus-ring:           0 0 0 3px rgba(168, 85, 247, 0.25);
}


/* =============================================================
   3. Base Element Reset & Enhancements
   ============================================================= */
html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background: var(--color-bg);
  min-height: 100vh;
}

a {
  color: var(--color-link);
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-hover);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
}

h1 { font-size: var(--text-3xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-2xl); letter-spacing: -0.01em; }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-md); }

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background: var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.4em;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

/* Focus ring */
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
.btn:focus-visible {
  box-shadow: var(--focus-ring) !important;
  border-color: var(--accent-color) !important;
}

/* Selection */
::selection {
  background: var(--accent-subtle);
  color: var(--color-text-primary);
}


/* =============================================================
   4. Scrollbar Styling
   ============================================================= */
::-webkit-scrollbar {
  width: var(--scrollbar-width);
  height: var(--scrollbar-width);
}
::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}
/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}


/* =============================================================
   5. Card System
   ============================================================= */
.ds-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
  transition: box-shadow var(--transition-base);
}
.ds-card:hover {
  box-shadow: var(--shadow-md);
}

.ds-card--flat {
  box-shadow: none;
  border-color: var(--color-border-light);
}
.ds-card--flat:hover {
  box-shadow: var(--shadow-sm);
}

.ds-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
}
.ds-card__title {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}
.ds-card__subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}


/* Stat Card */
.ds-stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  padding: var(--space-4) var(--space-5);
  transition: all var(--transition-ease-out);
  position: relative;
  overflow: hidden;
  border-top: 3px solid var(--card-accent);
}
.ds-stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.ds-stat-card__value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.ds-stat-card__label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.ds-stat-card__icon {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  font-size: 2rem;
  color: var(--stat-icon-color);
  opacity: 0.15;
  pointer-events: none;
}

/* Stat card color variants */
.ds-stat-card--danger  { border-top-color: var(--color-danger);  }
.ds-stat-card--warning { border-top-color: var(--color-warning); }
.ds-stat-card--success { border-top-color: var(--color-success); }
.ds-stat-card--info    { border-top-color: var(--color-info);    }

.ds-stat-card--danger  .ds-stat-card__icon { color: var(--color-danger);  }
.ds-stat-card--warning .ds-stat-card__icon { color: var(--color-warning); }
.ds-stat-card--success .ds-stat-card__icon { color: var(--color-success); }
.ds-stat-card--info    .ds-stat-card__icon { color: var(--color-info);    }

.ds-stat-card--danger  .ds-stat-card__value { color: var(--color-danger-text);  }
.ds-stat-card--warning .ds-stat-card__value { color: var(--color-warning-text); }
.ds-stat-card--success .ds-stat-card__value { color: var(--color-success-text); }

.ds-stat-card--clickable {
  cursor: pointer;
}
.ds-stat-card--clickable::after {
  content: '';
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  width: 16px;
  height: 16px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.ds-stat-card--clickable:hover::after {
  opacity: 0.3;
}


/* =============================================================
   6. Data Table System
   ============================================================= */
.ds-table {
  width: 100%;
  font-size: var(--table-row-size);
  border-collapse: separate;
  border-spacing: 0;
}
.ds-table thead th {
  background: var(--table-header-bg);
  color: var(--table-header-color);
  font-size: var(--table-header-size);
  font-weight: var(--table-header-weight);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: var(--space-2) var(--space-3);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: var(--table-header-z);
}
.ds-table tbody td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-primary);
  vertical-align: middle;
}
.ds-table tbody tr {
  transition: background var(--transition-fast);
}
.ds-table tbody tr:hover {
  background: var(--table-row-hover);
}

/* Striped variant */
.ds-table--striped tbody tr:nth-child(even) {
  background: var(--table-row-stripe);
}
.ds-table--striped tbody tr:nth-child(even):hover {
  background: var(--table-row-hover);
}

/* Compact variant */
.ds-table--compact thead th,
.ds-table--compact tbody td {
  padding: var(--space-1) var(--space-2);
}
.ds-table--compact tbody td {
  font-size: var(--text-xs);
}

/* Numeric columns */
.ds-table .num,
.ds-table .ds-num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Status indicator cells */
.ds-table td[data-status="danger"],
.ds-table td[data-status="danger"] {
  border-left: 4px solid var(--color-danger);
  padding-left: calc(var(--space-3) - 4px);
}
.ds-table td[data-status="warning"] {
  border-left: 4px solid var(--color-warning);
  padding-left: calc(var(--space-3) - 4px);
}
.ds-table td[data-status="success"] {
  border-left: 4px solid var(--color-success);
  padding-left: calc(var(--space-3) - 4px);
}

/* Row status */
.ds-table tr.ds-row--danger  { background: var(--color-danger-bg) !important; }
.ds-table tr.ds-row--warning { background: var(--color-warning-bg) !important; }
.ds-table tr.ds-row--success { background: var(--color-success-bg) !important; }


/* =============================================================
   7. Badge / Tag System
   ============================================================= */
.ds-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 10px;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  line-height: 1.4;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.ds-badge--danger {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
  border: 1px solid var(--color-danger-border);
}
.ds-badge--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
  border: 1px solid var(--color-warning-border);
}
.ds-badge--success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid var(--color-success-border);
}
.ds-badge--info {
  background: var(--color-info-bg);
  color: var(--color-info-text);
  border: 1px solid var(--color-info-border);
}
.ds-badge--brand {
  background: var(--accent-subtle);
  color: var(--accent-hover);
  border: 1px solid var(--brand-200);
}

.ds-badge--dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}


/* =============================================================
   8. Button Enhancements
   ============================================================= */
.ds-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}
.ds-btn--primary {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #fff;
}
.ds-btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

/* Ghost button */
.ds-btn--ghost {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}
.ds-btn--ghost:hover {
  background: var(--color-border-light);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}


/* =============================================================
   9. Form Enhancements
   ============================================================= */
.ds-input,
.ds-select {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background: var(--color-surface);
  transition: all var(--transition-fast);
}
.ds-input::placeholder {
  color: var(--color-text-muted);
}
.ds-input:hover,
.ds-select:hover {
  border-color: var(--accent-color);
}


/* =============================================================
   10. Alert / Notification
   ============================================================= */
.ds-alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  border-left: 4px solid;
}
.ds-alert--danger {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
  color: var(--color-danger-text);
}
.ds-alert--warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-warning-text);
}
.ds-alert--success {
  background: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success-text);
}
.ds-alert--info {
  background: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--color-info-text);
}


/* =============================================================
   11. Sidebar Common Styles
   ============================================================= */
.ds-sidebar {
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  width: var(--sidebar-width);
  min-height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1030;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}

.ds-sidebar__brand {
  padding: var(--space-5) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-md);
  font-weight: var(--font-bold);
  color: #ffffff;
  border-bottom: 1px solid var(--sidebar-divider);
  flex-shrink: 0;
}

.ds-sidebar__brand-icon {
  font-size: 1.4rem;
  opacity: 0.85;
}

.ds-sidebar__section-title {
  padding: var(--space-4) var(--space-4) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--sidebar-text-muted);
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color var(--transition-fast);
}
.ds-sidebar__section-title:hover {
  color: var(--sidebar-text);
}
.ds-sidebar__section-title::after {
  content: '\F282';
  font-family: 'bootstrap-icons';
  font-size: 0.7rem;
  transition: transform var(--transition-base);
}
.ds-sidebar__section-title.collapsed::after {
  transform: rotate(-90deg);
}

.ds-sidebar__nav {
  list-style: none;
  padding: 0;
  margin: 0;
}
.ds-sidebar__nav-item {
  margin: 1px var(--space-2);
}
.ds-sidebar__nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--sidebar-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.ds-sidebar__nav-link:hover {
  background: var(--sidebar-hover);
  color: #ffffff;
}
.ds-sidebar__nav-link.active {
  background: var(--sidebar-active);
  color: #ffffff;
  font-weight: var(--font-medium);
}

.ds-sidebar__nav-link i {
  font-size: var(--text-base);
  opacity: 0.7;
  width: 1.2em;
  text-align: center;
}

/* Sidebar footer */
.ds-sidebar__footer {
  margin-top: auto;
  padding: var(--space-4);
  border-top: 1px solid var(--sidebar-divider);
  font-size: var(--text-xs);
  color: var(--sidebar-text-muted);
  flex-shrink: 0;
}


/* =============================================================
   12. Top Navbar
   ============================================================= */
.ds-topbar {
  position: sticky;
  top: 0;
  z-index: 1020;
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--topbar-border);
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-5);
  gap: var(--space-4);
}

.ds-topbar__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--page-title-color);
  margin: 0;
  letter-spacing: -0.01em;
}

.ds-topbar__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}


/* =============================================================
   13. Page Layout
   ============================================================= */
.ds-page {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.ds-page__content {
  padding: var(--space-5);
}

.ds-page__section {
  margin-bottom: var(--space-5);
}


/* =============================================================
   14. KPI / Stat Row
   ============================================================= */
.ds-stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}


/* =============================================================
   15. Filter Bar
   ============================================================= */
.ds-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  margin-bottom: var(--space-4);
}
.ds-filter-bar__group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.ds-filter-bar__label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  white-space: nowrap;
}


/* =============================================================
   16. Empty State
   ============================================================= */
.ds-empty {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  color: var(--color-text-muted);
}
.ds-empty__icon {
  font-size: 2.5rem;
  opacity: 0.4;
  margin-bottom: var(--space-4);
}
.ds-empty__title {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}
.ds-empty__desc {
  font-size: var(--text-sm);
  max-width: 320px;
  margin: 0 auto var(--space-4);
}


/* =============================================================
   17. Loading Skeleton / Shimmer
   ============================================================= */
@keyframes ds-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.ds-skeleton {
  background: linear-gradient(90deg,
    var(--color-border-light) 25%,
    var(--color-surface) 50%,
    var(--color-border-light) 75%
  );
  background-size: 200% 100%;
  animation: ds-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.ds-skeleton--text {
  height: 0.9rem;
  margin-bottom: var(--space-2);
}
.ds-skeleton--text.ds-skeleton--short { width: 60%; }
.ds-skeleton--text.ds-skeleton--long  { width: 90%; }

.ds-skeleton--title {
  height: 1.3rem;
  width: 40%;
  margin-bottom: var(--space-3);
}

.ds-skeleton--card {
  height: 80px;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
}

.ds-skeleton--row {
  height: 2rem;
  margin-bottom: var(--space-1);
}


/* =============================================================
   18. Animations
   ============================================================= */
@keyframes ds-fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes ds-slideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes ds-slideOutRight {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(100%); }
}
@keyframes ds-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}
@keyframes ds-scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

.ds-animate-in {
  animation: ds-fadeIn var(--transition-slow) both;
}
.ds-animate-stagger > * {
  opacity: 0;
  animation: ds-fadeIn var(--transition-slow) forwards;
}
.ds-animate-stagger > *:nth-child(1) { animation-delay: 0.05s; }
.ds-animate-stagger > *:nth-child(2) { animation-delay: 0.1s;  }
.ds-animate-stagger > *:nth-child(3) { animation-delay: 0.15s; }
.ds-animate-stagger > *:nth-child(4) { animation-delay: 0.2s;  }
.ds-animate-stagger > *:nth-child(5) { animation-delay: 0.25s; }
.ds-animate-stagger > *:nth-child(6) { animation-delay: 0.3s;  }


/* =============================================================
   19. Flash / Toast Messages
   ============================================================= */
.ds-flash-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 1060;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 400px;
}

.ds-flash {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-lg);
  animation: ds-slideInRight 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border-left: 4px solid;
}
.ds-flash--success { background: var(--color-success-bg); border-color: var(--color-success); color: var(--color-success-text); }
.ds-flash--danger  { background: var(--color-danger-bg);  border-color: var(--color-danger);  color: var(--color-danger-text);  }
.ds-flash--warning { background: var(--color-warning-bg); border-color: var(--color-warning); color: var(--color-warning-text); }
.ds-flash--info    { background: var(--color-info-bg);    border-color: var(--color-info);    color: var(--color-info-text);    }


/* =============================================================
   20. Compact Mode Toggle
   ============================================================= */
.ds-compact-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: all var(--transition-fast);
}
.ds-compact-toggle:hover {
  color: var(--color-text-primary);
  border-color: var(--accent-color);
}
.ds-compact-toggle.active {
  background: var(--accent-subtle);
  color: var(--accent-color);
  border-color: var(--accent-color);
}


/* =============================================================
   21. Modal Enhancements
   ============================================================= */
.modal-content {
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}
.modal-header {
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-4) var(--space-5);
}
.modal-title {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
}
.modal-body {
  padding: var(--space-5);
}
.modal-footer {
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-3) var(--space-5);
}


/* =============================================================
   22. Utility Classes
   ============================================================= */
.ds-text-danger  { color: var(--color-danger)  !important; }
.ds-text-warning { color: var(--color-warning) !important; }
.ds-text-success { color: var(--color-success) !important; }
.ds-text-info    { color: var(--color-info)    !important; }
.ds-text-muted   { color: var(--color-text-muted) !important; }
.ds-text-secondary { color: var(--color-text-secondary) !important; }

.ds-font-mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.ds-font-bold { font-weight: var(--font-bold); }
.ds-font-semibold { font-weight: var(--font-semibold); }

.ds-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: var(--space-4) 0;
}

.ds-gap-2 { gap: var(--space-2); }
.ds-gap-3 { gap: var(--space-3); }
.ds-gap-4 { gap: var(--space-4); }


/* =============================================================
   23. Mobile Responsive
   ============================================================= */
@media (max-width: 767.98px) {
  .ds-sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  .ds-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-sidebar);
  }
  .ds-page {
    margin-left: 0;
  }
  .ds-page__content {
    padding: var(--space-3);
  }
  .ds-topbar {
    padding: 0 var(--space-3);
  }
  .ds-stat-row {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }
  .ds-filter-bar {
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3);
  }
  .ds-stat-card {
    padding: var(--space-3);
  }
  .ds-stat-card__value {
    font-size: var(--text-xl);
  }
  /* Scroll hint for wide tables */
  .ds-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
  }
  .ds-table-wrap::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 20px;
    background: linear-gradient(to right, transparent, rgba(0,0,0,0.05));
    pointer-events: none;
  }
}

@media (max-width: 575.98px) {
  .ds-stat-row {
    grid-template-columns: 1fr;
  }
}


/* =============================================================
   24. Print Styles
   ============================================================= */
@media print {
  .ds-sidebar,
  .ds-topbar,
  .ds-filter-bar,
  .navbar,
  .sidebar,
  .topbar,
  .btn,
  .no-print,
  #mobile-toggle,
  #mobile-backdrop,
  nav {
    display: none !important;
  }

  .ds-page {
    margin-left: 0 !important;
  }
  .ds-page__content {
    padding: 0 !important;
  }

  body {
    background: #fff !important;
    color: #000 !important;
    font-size: 12px;
  }

  .ds-card,
  .card {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
    break-inside: avoid;
  }

  .ds-stat-card {
    border: 1px solid #ddd !important;
    box-shadow: none !important;
    break-inside: avoid;
  }

  table {
    font-size: 10px;
  }
  thead {
    display: table-header-group;
  }
  tr {
    break-inside: avoid;
  }

  a[href]::after {
    content: none !important;
  }
}

} /* end @layer design-system */