/*! FoxUI v3.0 — Egger Enterprises Design System (Native 2026 Edition)
 *  Dark-first, responsive, dashboard-optimized, CSS-first
 *  100% retrocompatible con v2.0 — todo lo nuevo es aditivo
 *
 *  v2.0 base (intacta):
 *    - Tokens inspired by Open Props (Adam Argyle, Google Chrome)
 *    - Shadows: 6-layer system / Easings: spring/elastic/bounce
 *    - 23 animations + 5 hover micro-interactions
 *    - 40+ componentes (sidebar, cards, tables, modals, etc)
 *
 *  v3.0 adiciones (secciones 11-20, nativo sin libs JS):
 *    - 11. OKLCH color system (perceptually uniform) + color-mix()
 *    - 12. Fluid typography con clamp() (--fox-fs-*-fluid opt-in)
 *    - 13. Container queries (@container) para componentes autoresponsive
 *    - 14. Scroll-driven animations (reemplaza AOS, sin JS)
 *    - 15. View Transitions API helpers (same-document + @view-transition)
 *    - 16. Anchor positioning (tooltips/popovers CSS-native)
 *    - 17. Popover API nativo (.fox-popover usa atributo `popover`)
 *    - 18. @starting-style (transiciones de entrada CSS puro)
 *    - 19. A11y 2026 (forced-colors, prefers-contrast, motion refinado)
 *    - 20. Patrones :has() (formularios reactivos, checklists, etc)
 *
 *  Browser support (verificado contra caniuse.com abril 2026):
 *    - Baseline widely-available: :has, container queries, @starting-style, color-mix, oklch
 *    - Baseline newly-available (2025-2026): scroll-driven, anchor positioning, view transitions, popover
 *    - Cada feature nueva tiene @supports fallback — nada se rompe en browsers viejos
 *
 *  Usage: <link href="(liga quitada al construir)" rel="stylesheet">
 *  Docs: github.com/IsaruG/foxui
 */

/* ============================================================
   0. CSS RESET (minimal)
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100vh; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }

/* ============================================================
   1. DESIGN TOKENS (CSS Variables)
   ============================================================ */
:root {
  /* Typography */
  --fox-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fox-font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --fox-font-size-xs: 0.75rem;
  --fox-font-size-sm: 0.875rem;
  --fox-font-size-base: 1rem;
  --fox-font-size-lg: 1.125rem;
  --fox-font-size-xl: 1.25rem;
  --fox-font-size-2xl: 1.5rem;
  --fox-font-size-3xl: 1.875rem;
  --fox-font-size-4xl: 2.25rem;
  --fox-line-height: 1.6;
  --fox-line-height-tight: 1.25;

  /* Spacing (4px base) */
  --fox-space-1: 0.25rem;
  --fox-space-2: 0.5rem;
  --fox-space-3: 0.75rem;
  --fox-space-4: 1rem;
  --fox-space-5: 1.25rem;
  --fox-space-6: 1.5rem;
  --fox-space-8: 2rem;
  --fox-space-10: 2.5rem;
  --fox-space-12: 3rem;
  --fox-space-16: 4rem;

  /* Border Radius */
  --fox-radius-sm: 0.375rem;
  --fox-radius: 0.5rem;
  --fox-radius-lg: 0.75rem;
  --fox-radius-xl: 1rem;
  --fox-radius-full: 9999px;

  /* Shadows — 6-layer system inspired by Open Props (Adam Argyle, Google Chrome)
     Each level adds depth layers for realistic elevation */
  --fox-shadow-color: 220 3% 15%;
  --fox-shadow-strength: 1%;
  --fox-shadow-sm: 0 1px 2px -1px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 9%));
  --fox-shadow: 0 3px 5px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 3%)),
                0 7px 14px -5px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 5%));
  --fox-shadow-md: 0 -1px 3px 0 hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 2%)),
                   0 1px 2px -5px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 2%)),
                   0 2px 5px -5px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 4%)),
                   0 4px 12px -5px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 5%)),
                   0 12px 15px -5px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 7%));
  --fox-shadow-lg: 0 -2px 5px 0 hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 2%)),
                   0 1px 1px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 3%)),
                   0 2px 2px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 3%)),
                   0 5px 5px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 4%)),
                   0 9px 9px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 5%)),
                   0 16px 16px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 6%));
  --fox-shadow-xl: 0 -1px 2px 0 hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 2%)),
                   0 2px 1px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 3%)),
                   0 5px 5px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 3%)),
                   0 10px 10px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 4%)),
                   0 20px 20px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 5%)),
                   0 40px 40px -2px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 7%));
  --fox-inner-shadow: inset 0 0 0 1px hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 9%)),
                      inset 0 2px 4px 0 hsl(var(--fox-shadow-color) / calc(var(--fox-shadow-strength) + 7%));

  /* Transitions — standard */
  --fox-transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --fox-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Easings — from Open Props (professional-grade motion curves) */
  --fox-ease-1: cubic-bezier(0.25, 0, 0.5, 1);
  --fox-ease-2: cubic-bezier(0.25, 0, 0.4, 1);
  --fox-ease-3: cubic-bezier(0.25, 0, 0.3, 1);
  --fox-ease-out-1: cubic-bezier(0, 0, 0.75, 1);
  --fox-ease-out-3: cubic-bezier(0, 0, 0.3, 1);
  --fox-ease-out-5: cubic-bezier(0, 0, 0, 1);
  --fox-ease-in-1: cubic-bezier(0.25, 0, 1, 1);
  --fox-ease-in-3: cubic-bezier(0.5, 0, 1, 1);
  --fox-ease-elastic-out-3: cubic-bezier(0.5, 1.25, 0.75, 1.25);
  --fox-ease-elastic-out-5: cubic-bezier(0.5, 1.75, 0.75, 1.25);
  --fox-ease-bounce: cubic-bezier(0.2, 0.6, 0.35, 1);

  /* Gradients — from Open Props (curated by Google Chrome team) */
  --fox-gradient-brand: linear-gradient(to bottom right, #6366f1, #8b5cf6, #a855f7);
  --fox-gradient-sunset: linear-gradient(to bottom right, #f97316, #ef4444, #ec4899);
  --fox-gradient-ocean: linear-gradient(to bottom right, #06b6d4, #3b82f6, #6366f1);
  --fox-gradient-forest: linear-gradient(to bottom right, #22c55e, #14b8a6, #06b6d4);
  --fox-gradient-metal: linear-gradient(to bottom right, #334155, #1e293b, #0f172a);
  --fox-gradient-glow: radial-gradient(circle at 50% 50%, rgba(99,102,241,0.15) 0%, transparent 70%);

  /* Sidebar */
  --fox-sidebar-width: 260px;
  --fox-sidebar-collapsed: 64px;
  --fox-topbar-height: 56px;

  /* Z-index layers */
  --fox-z-dropdown: 100;
  --fox-z-sticky: 200;
  --fox-z-modal-backdrop: 300;
  --fox-z-modal: 400;
  --fox-z-toast: 500;
}

/* ============================================================
   2. COLOR THEMES
   ============================================================ */

/* Dark Mode (DEFAULT) */
:root, [data-theme="dark"] {
  --fox-bg: #0a0a0f;
  --fox-bg-raised: #12121a;
  --fox-bg-overlay: #1a1a25;
  --fox-bg-hover: #22222f;
  --fox-bg-active: #2a2a38;

  --fox-border: #2a2a3a;
  --fox-border-hover: #3a3a4f;
  --fox-border-focus: #6366f1;

  /* Dark mode shadows need more strength — from Open Props */
  --fox-shadow-strength: 25%;
  --fox-shadow-color: 220 40% 2%;

  --fox-text: #e4e4ec;
  --fox-text-secondary: #9494a8;
  /* Corregido por accesibilidad (18-ago-2026, autorizado por Egger).
     Era #5a5a70: 2,94:1 sobre --fox-bg y 2,78:1 sobre --fox-bg-raised.
     Reprobaba WCAG AA (4,5:1) y hasta el minimo de 3:1 de texto grande.
     Ahora 5,86:1 y 5,53:1. Mismo tono, solo se subio la luminosidad.
     Los valores de prefers-contrast NO se tocaron: los de `more` ya
     daban AAA y el de `less` es una adaptacion deliberada. */
  --fox-text-muted: #8a8b99;
  --fox-text-inverse: #0a0a0f;

  --fox-primary: #6366f1;
  --fox-primary-hover: #818cf8;
  --fox-primary-bg: rgba(99, 102, 241, 0.12);
  --fox-primary-text: #a5b4fc;

  --fox-success: #22c55e;
  --fox-success-bg: rgba(34, 197, 94, 0.12);
  --fox-success-text: #86efac;

  --fox-warning: #f59e0b;
  --fox-warning-bg: rgba(245, 158, 11, 0.12);
  --fox-warning-text: #fcd34d;

  --fox-danger: #ef4444;
  --fox-danger-bg: rgba(239, 68, 68, 0.12);
  --fox-danger-text: #fca5a5;

  --fox-info: #06b6d4;
  --fox-info-bg: rgba(6, 182, 212, 0.12);
  --fox-info-text: #67e8f9;

  --fox-scrollbar-track: #12121a;
  --fox-scrollbar-thumb: #2a2a3a;
}

/* Light Mode */
[data-theme="light"] {
  --fox-bg: #fafafa;
  --fox-bg-raised: #ffffff;
  --fox-bg-overlay: #f4f4f5;
  --fox-bg-hover: #ececef;
  --fox-bg-active: #e4e4e7;

  --fox-border: #e4e4e7;
  --fox-border-hover: #d4d4d8;
  --fox-border-focus: #6366f1;

  --fox-text: #18181b;
  --fox-text-secondary: #52525b;
  /* Corregido por accesibilidad (18-ago-2026, autorizado por Egger).
     Era #a1a1aa: 2,46:1 sobre --fox-bg y 2,56:1 sobre --fox-bg-raised.
     El tema claro reprobaba MAS que el oscuro. Ahora 5,03:1 y 5,25:1. */
  --fox-text-muted: #6b6b78;
  --fox-text-inverse: #fafafa;

  --fox-primary: #4f46e5;
  --fox-primary-hover: #6366f1;
  --fox-primary-bg: rgba(79, 70, 229, 0.08);
  --fox-primary-text: #4338ca;

  --fox-success: #16a34a;
  --fox-success-bg: rgba(22, 163, 74, 0.08);
  --fox-success-text: #15803d;

  --fox-warning: #d97706;
  --fox-warning-bg: rgba(217, 119, 6, 0.08);
  --fox-warning-text: #b45309;

  --fox-danger: #dc2626;
  --fox-danger-bg: rgba(220, 38, 38, 0.08);
  --fox-danger-text: #b91c1c;

  --fox-info: #0891b2;
  --fox-info-bg: rgba(8, 145, 178, 0.08);
  --fox-info-text: #0e7490;

  --fox-scrollbar-track: #f4f4f5;
  --fox-scrollbar-thumb: #d4d4d8;
}

/* ============================================================
   3. BASE STYLES
   ============================================================ */
body {
  font-family: var(--fox-font);
  font-size: var(--fox-font-size-base);
  line-height: var(--fox-line-height);
  color: var(--fox-text);
  background: var(--fox-bg);
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--fox-scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--fox-scrollbar-thumb); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--fox-border-hover); }

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

/* Focus ring */
:focus-visible { outline: 2px solid var(--fox-border-focus); outline-offset: 2px; }

/* ============================================================
   4. TYPOGRAPHY
   ============================================================ */
.fox-h1 { font-size: var(--fox-font-size-4xl); font-weight: 700; line-height: var(--fox-line-height-tight); letter-spacing: -0.025em; }
.fox-h2 { font-size: var(--fox-font-size-3xl); font-weight: 600; line-height: var(--fox-line-height-tight); letter-spacing: -0.02em; }
.fox-h3 { font-size: var(--fox-font-size-2xl); font-weight: 600; line-height: var(--fox-line-height-tight); }
.fox-h4 { font-size: var(--fox-font-size-xl); font-weight: 600; }
.fox-h5 { font-size: var(--fox-font-size-lg); font-weight: 500; }
.fox-text-sm { font-size: var(--fox-font-size-sm); }
.fox-text-xs { font-size: var(--fox-font-size-xs); }
.fox-text-muted { color: var(--fox-text-muted); }
.fox-text-secondary { color: var(--fox-text-secondary); }
.fox-text-mono { font-family: var(--fox-font-mono); }
.fox-text-center { text-align: center; }
.fox-text-right { text-align: right; }
.fox-font-bold { font-weight: 700; }
.fox-font-semibold { font-weight: 600; }
.fox-font-medium { font-weight: 500; }

/* ============================================================
   5. LAYOUTS
   ============================================================ */

/* --- Dashboard Layout (sidebar + topbar + content) --- */
.fox-layout {
  display: flex;
  min-height: 100vh;
}

.fox-sidebar {
  width: var(--fox-sidebar-width);
  background: var(--fox-bg-raised);
  border-right: 1px solid var(--fox-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: var(--fox-z-sticky);
  transition: width var(--fox-transition-slow);
  overflow-y: auto;
  overflow-x: hidden;
}

.fox-sidebar.collapsed {
  width: var(--fox-sidebar-collapsed);
}

.fox-sidebar-header {
  padding: var(--fox-space-4) var(--fox-space-5);
  border-bottom: 1px solid var(--fox-border);
  display: flex;
  align-items: center;
  gap: var(--fox-space-3);
  min-height: var(--fox-topbar-height);
}

.fox-sidebar-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--fox-radius);
  background: var(--fox-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--fox-font-size-sm);
  flex-shrink: 0;
}

.fox-sidebar-brand {
  font-weight: 600;
  font-size: var(--fox-font-size-lg);
  white-space: nowrap;
  overflow: hidden;
}

.fox-sidebar-nav {
  padding: var(--fox-space-3);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--fox-space-1);
}

.fox-sidebar-section {
  padding: var(--fox-space-4) var(--fox-space-3) var(--fox-space-2);
  font-size: var(--fox-font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fox-text-muted);
}

.fox-sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--fox-space-3);
  padding: var(--fox-space-2) var(--fox-space-3);
  border-radius: var(--fox-radius);
  color: var(--fox-text-secondary);
  cursor: pointer;
  transition: all var(--fox-transition);
  white-space: nowrap;
  font-size: var(--fox-font-size-sm);
}

.fox-sidebar-item:hover {
  background: var(--fox-bg-hover);
  color: var(--fox-text);
}

.fox-sidebar-item.active {
  background: var(--fox-primary-bg);
  color: var(--fox-primary-text);
}

.fox-sidebar-item svg,
.fox-sidebar-item i {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.fox-sidebar-footer {
  padding: var(--fox-space-3) var(--fox-space-4);
  border-top: 1px solid var(--fox-border);
  margin-top: auto;
}

/* Main content area */
.fox-main {
  flex: 1;
  margin-left: var(--fox-sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--fox-transition-slow);
}

.fox-sidebar.collapsed ~ .fox-main {
  margin-left: var(--fox-sidebar-collapsed);
}

/* Topbar */
.fox-topbar {
  height: var(--fox-topbar-height);
  background: var(--fox-bg-raised);
  border-bottom: 1px solid var(--fox-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--fox-space-6);
  position: sticky;
  top: 0;
  z-index: var(--fox-z-sticky);
  gap: var(--fox-space-4);
}

.fox-topbar-title {
  font-weight: 600;
  font-size: var(--fox-font-size-lg);
}

.fox-topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--fox-space-3);
}

/* Breadcrumb */
.fox-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--fox-space-2);
  font-size: var(--fox-font-size-sm);
  color: var(--fox-text-muted);
  padding: var(--fox-space-3) var(--fox-space-6);
}

.fox-breadcrumb a:hover { color: var(--fox-text); }
.fox-breadcrumb-sep::before { content: '/'; margin: 0 var(--fox-space-1); }
.fox-breadcrumb-current { color: var(--fox-text); font-weight: 500; }

/* Page content */
.fox-content {
  padding: var(--fox-space-6);
  flex: 1;
}

/* Page header */
.fox-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--fox-space-6);
  gap: var(--fox-space-4);
  flex-wrap: wrap;
}

/* Grid system */
.fox-grid { display: grid; gap: var(--fox-space-4); }
.fox-grid-2 { grid-template-columns: repeat(2, 1fr); }
.fox-grid-3 { grid-template-columns: repeat(3, 1fr); }
.fox-grid-4 { grid-template-columns: repeat(4, 1fr); }
.fox-grid-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* Flex utilities */
.fox-flex { display: flex; }
.fox-flex-col { flex-direction: column; }
.fox-flex-wrap { flex-wrap: wrap; }
.fox-items-center { align-items: center; }
.fox-justify-between { justify-content: space-between; }
.fox-justify-center { justify-content: center; }
.fox-gap-1 { gap: var(--fox-space-1); }
.fox-gap-2 { gap: var(--fox-space-2); }
.fox-gap-3 { gap: var(--fox-space-3); }
.fox-gap-4 { gap: var(--fox-space-4); }
.fox-gap-6 { gap: var(--fox-space-6); }
.fox-flex-1 { flex: 1; }

/* --- Auth Layout (centered card) --- */
.fox-layout-auth {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--fox-bg);
  padding: var(--fox-space-4);
}

.fox-auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--fox-bg-raised);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-xl);
  padding: var(--fox-space-8);
  box-shadow: var(--fox-shadow-xl);
}

.fox-auth-logo {
  text-align: center;
  margin-bottom: var(--fox-space-6);
}

.fox-auth-title {
  font-size: var(--fox-font-size-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--fox-space-2);
}

.fox-auth-subtitle {
  font-size: var(--fox-font-size-sm);
  color: var(--fox-text-secondary);
  text-align: center;
  margin-bottom: var(--fox-space-6);
}

/* ============================================================
   6. COMPONENTS
   ============================================================ */

/* --- Card --- */
.fox-card {
  background: var(--fox-bg-raised);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-lg);
  padding: var(--fox-space-5);
  transition: border-color var(--fox-transition), box-shadow var(--fox-transition);
}

.fox-card:hover {
  border-color: var(--fox-border-hover);
}

.fox-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--fox-space-4);
  gap: var(--fox-space-3);
}

.fox-card-title {
  font-size: var(--fox-font-size-base);
  font-weight: 600;
}

.fox-card-body {
  font-size: var(--fox-font-size-sm);
  color: var(--fox-text-secondary);
}

.fox-card-footer {
  margin-top: var(--fox-space-4);
  padding-top: var(--fox-space-4);
  border-top: 1px solid var(--fox-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--fox-space-2);
}

/* --- Stat Card --- */
.fox-stat-card {
  background: var(--fox-bg-raised);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-lg);
  padding: var(--fox-space-5);
}

.fox-stat-label {
  font-size: var(--fox-font-size-xs);
  font-weight: 500;
  color: var(--fox-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--fox-space-1);
}

.fox-stat-value {
  font-size: var(--fox-font-size-3xl);
  font-weight: 700;
  line-height: var(--fox-line-height-tight);
}

.fox-stat-change {
  font-size: var(--fox-font-size-xs);
  margin-top: var(--fox-space-1);
  display: flex;
  align-items: center;
  gap: var(--fox-space-1);
}

.fox-stat-change.positive { color: var(--fox-success-text); }
.fox-stat-change.negative { color: var(--fox-danger-text); }

.fox-stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--fox-radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.fox-stat-icon.primary { background: var(--fox-primary-bg); color: var(--fox-primary-text); }
.fox-stat-icon.success { background: var(--fox-success-bg); color: var(--fox-success-text); }
.fox-stat-icon.warning { background: var(--fox-warning-bg); color: var(--fox-warning-text); }
.fox-stat-icon.danger { background: var(--fox-danger-bg); color: var(--fox-danger-text); }
.fox-stat-icon.info { background: var(--fox-info-bg); color: var(--fox-info-text); }

/* --- Button --- */
.fox-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--fox-space-2);
  padding: var(--fox-space-2) var(--fox-space-4);
  border-radius: var(--fox-radius);
  font-size: var(--fox-font-size-sm);
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--fox-transition);
  white-space: nowrap;
  line-height: 1.5;
}

.fox-btn:disabled, .fox-btn.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.fox-btn svg { width: 16px; height: 16px; }

.fox-btn-primary {
  background: var(--fox-primary);
  color: white;
}
.fox-btn-primary:hover { background: var(--fox-primary-hover); }

.fox-btn-secondary {
  background: var(--fox-bg-overlay);
  border-color: var(--fox-border);
  color: var(--fox-text);
}
.fox-btn-secondary:hover { background: var(--fox-bg-hover); border-color: var(--fox-border-hover); }

.fox-btn-danger {
  background: var(--fox-danger);
  color: white;
}
.fox-btn-danger:hover { background: #dc2626; }

.fox-btn-ghost {
  background: transparent;
  color: var(--fox-text-secondary);
}
.fox-btn-ghost:hover { background: var(--fox-bg-hover); color: var(--fox-text); }

.fox-btn-outline {
  background: transparent;
  border-color: var(--fox-border);
  color: var(--fox-text);
}
.fox-btn-outline:hover { background: var(--fox-bg-hover); }

.fox-btn-sm { padding: var(--fox-space-1) var(--fox-space-3); font-size: var(--fox-font-size-xs); }
.fox-btn-lg { padding: var(--fox-space-3) var(--fox-space-6); font-size: var(--fox-font-size-base); }
.fox-btn-icon { padding: var(--fox-space-2); }

/* Loading spinner in button */
.fox-btn-loading { position: relative; color: transparent !important; pointer-events: none; }
.fox-btn-loading::after {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: fox-spin 0.6s linear infinite;
}

/* --- Table --- */
.fox-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-lg);
}

.fox-table {
  width: 100%;
  font-size: var(--fox-font-size-sm);
}

.fox-table th {
  text-align: left;
  padding: var(--fox-space-3) var(--fox-space-4);
  font-weight: 600;
  font-size: var(--fox-font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fox-text-muted);
  background: var(--fox-bg-overlay);
  border-bottom: 1px solid var(--fox-border);
  white-space: nowrap;
}

.fox-table td {
  padding: var(--fox-space-3) var(--fox-space-4);
  border-bottom: 1px solid var(--fox-border);
  color: var(--fox-text-secondary);
}

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

.fox-table tr:hover td {
  background: var(--fox-bg-hover);
}

.fox-table-sortable th {
  cursor: pointer;
  user-select: none;
}

.fox-table-sortable th:hover {
  color: var(--fox-text);
}

/* --- Badge --- */
.fox-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--fox-space-1);
  padding: 2px var(--fox-space-2);
  border-radius: var(--fox-radius-full);
  font-size: var(--fox-font-size-xs);
  font-weight: 500;
  line-height: 1.5;
}

.fox-badge-primary { background: var(--fox-primary-bg); color: var(--fox-primary-text); }
.fox-badge-success { background: var(--fox-success-bg); color: var(--fox-success-text); }
.fox-badge-warning { background: var(--fox-warning-bg); color: var(--fox-warning-text); }
.fox-badge-danger { background: var(--fox-danger-bg); color: var(--fox-danger-text); }
.fox-badge-info { background: var(--fox-info-bg); color: var(--fox-info-text); }
.fox-badge-neutral { background: var(--fox-bg-overlay); color: var(--fox-text-secondary); }

/* Badge dot indicator */
.fox-badge-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* --- Form Controls --- */
.fox-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--fox-space-2);
  margin-bottom: var(--fox-space-4);
}

.fox-label {
  font-size: var(--fox-font-size-sm);
  font-weight: 500;
  color: var(--fox-text);
}

.fox-label-required::after {
  content: ' *';
  color: var(--fox-danger);
}

.fox-input,
.fox-select,
.fox-textarea {
  width: 100%;
  padding: var(--fox-space-2) var(--fox-space-3);
  background: var(--fox-bg);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius);
  color: var(--fox-text);
  font-size: var(--fox-font-size-sm);
  transition: border-color var(--fox-transition), box-shadow var(--fox-transition);
}

.fox-input:hover, .fox-select:hover, .fox-textarea:hover {
  border-color: var(--fox-border-hover);
}

.fox-input:focus, .fox-select:focus, .fox-textarea:focus {
  border-color: var(--fox-border-focus);
  box-shadow: 0 0 0 3px var(--fox-primary-bg);
  outline: none;
}

.fox-input::placeholder { color: var(--fox-text-muted); }

.fox-input-error { border-color: var(--fox-danger); }
.fox-input-error:focus { box-shadow: 0 0 0 3px var(--fox-danger-bg); }

.fox-input-success { border-color: var(--fox-success); }

.fox-helper-text {
  font-size: var(--fox-font-size-xs);
  color: var(--fox-text-muted);
}

.fox-error-text {
  font-size: var(--fox-font-size-xs);
  color: var(--fox-danger-text);
}

.fox-textarea { min-height: 80px; resize: vertical; }

/* Checkbox & Radio */
.fox-checkbox,
.fox-radio {
  display: flex;
  align-items: center;
  gap: var(--fox-space-2);
  font-size: var(--fox-font-size-sm);
  cursor: pointer;
}

.fox-checkbox input, .fox-radio input {
  width: 16px;
  height: 16px;
  accent-color: var(--fox-primary);
}

/* Switch */
.fox-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--fox-space-2);
  cursor: pointer;
  font-size: var(--fox-font-size-sm);
}

.fox-switch input { display: none; }

.fox-switch-track {
  width: 36px;
  height: 20px;
  background: var(--fox-bg-active);
  border-radius: var(--fox-radius-full);
  position: relative;
  transition: background var(--fox-transition);
}

.fox-switch-track::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  background: white;
  border-radius: 50%;
  transition: transform var(--fox-transition);
}

.fox-switch input:checked + .fox-switch-track {
  background: var(--fox-primary);
}

.fox-switch input:checked + .fox-switch-track::after {
  transform: translateX(16px);
}

/* --- Modal --- */
.fox-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: var(--fox-z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--fox-space-4);
  animation: fox-fade-in 0.15s ease;
}

.fox-modal {
  background: var(--fox-bg-raised);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-xl);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--fox-shadow-xl);
  z-index: var(--fox-z-modal);
  animation: fox-scale-in 0.15s ease;
}

.fox-modal-lg { max-width: 720px; }
.fox-modal-sm { max-width: 380px; }

.fox-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--fox-space-5) var(--fox-space-6);
  border-bottom: 1px solid var(--fox-border);
}

.fox-modal-title {
  font-size: var(--fox-font-size-lg);
  font-weight: 600;
}

.fox-modal-close {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--fox-radius);
  border: none;
  background: transparent;
  color: var(--fox-text-muted);
  cursor: pointer;
  transition: all var(--fox-transition);
}

.fox-modal-close:hover {
  background: var(--fox-bg-hover);
  color: var(--fox-text);
}

.fox-modal-body { padding: var(--fox-space-6); }

.fox-modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--fox-space-2);
  padding: var(--fox-space-4) var(--fox-space-6);
  border-top: 1px solid var(--fox-border);
}

/* --- Alert / Toast --- */
.fox-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--fox-space-3);
  padding: var(--fox-space-3) var(--fox-space-4);
  border-radius: var(--fox-radius);
  font-size: var(--fox-font-size-sm);
  border: 1px solid;
}

.fox-alert svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }

.fox-alert-success { background: var(--fox-success-bg); border-color: var(--fox-success); color: var(--fox-success-text); }
.fox-alert-warning { background: var(--fox-warning-bg); border-color: var(--fox-warning); color: var(--fox-warning-text); }
.fox-alert-danger { background: var(--fox-danger-bg); border-color: var(--fox-danger); color: var(--fox-danger-text); }
.fox-alert-info { background: var(--fox-info-bg); border-color: var(--fox-info); color: var(--fox-info-text); }

/* Toast container */
.fox-toast-container {
  position: fixed;
  top: var(--fox-space-4);
  right: var(--fox-space-4);
  z-index: var(--fox-z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--fox-space-2);
}

.fox-toast {
  background: var(--fox-bg-raised);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-lg);
  padding: var(--fox-space-3) var(--fox-space-4);
  box-shadow: var(--fox-shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--fox-space-3);
  min-width: 280px;
  max-width: 420px;
  font-size: var(--fox-font-size-sm);
  animation: fox-slide-in-right 0.2s ease;
}

/* --- Tabs --- */
.fox-tabs {
  display: flex;
  border-bottom: 1px solid var(--fox-border);
  gap: 0;
  overflow-x: auto;
}

.fox-tab {
  padding: var(--fox-space-3) var(--fox-space-4);
  font-size: var(--fox-font-size-sm);
  font-weight: 500;
  color: var(--fox-text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--fox-transition);
  white-space: nowrap;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.fox-tab:hover { color: var(--fox-text); }

.fox-tab.active {
  color: var(--fox-primary-text);
  border-bottom-color: var(--fox-primary);
}

.fox-tab-content { padding: var(--fox-space-4) 0; }

/* --- Dropdown --- */
.fox-dropdown {
  position: relative;
  display: inline-block;
}

.fox-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--fox-space-1);
  background: var(--fox-bg-raised);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-lg);
  box-shadow: var(--fox-shadow-lg);
  min-width: 180px;
  padding: var(--fox-space-1);
  z-index: var(--fox-z-dropdown);
  animation: fox-fade-in 0.1s ease;
}

.fox-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--fox-space-2);
  padding: var(--fox-space-2) var(--fox-space-3);
  font-size: var(--fox-font-size-sm);
  border-radius: var(--fox-radius-sm);
  cursor: pointer;
  transition: background var(--fox-transition);
  color: var(--fox-text-secondary);
}

.fox-dropdown-item:hover {
  background: var(--fox-bg-hover);
  color: var(--fox-text);
}

.fox-dropdown-item.danger { color: var(--fox-danger-text); }
.fox-dropdown-item.danger:hover { background: var(--fox-danger-bg); }

.fox-dropdown-divider {
  height: 1px;
  background: var(--fox-border);
  margin: var(--fox-space-1) 0;
}

/* --- Avatar --- */
.fox-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--fox-radius-full);
  background: var(--fox-primary-bg);
  color: var(--fox-primary-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--fox-font-size-sm);
  overflow: hidden;
  flex-shrink: 0;
}

.fox-avatar img { width: 100%; height: 100%; object-fit: cover; }
.fox-avatar-sm { width: 28px; height: 28px; font-size: var(--fox-font-size-xs); }
.fox-avatar-lg { width: 48px; height: 48px; font-size: var(--fox-font-size-lg); }
.fox-avatar-xl { width: 64px; height: 64px; font-size: var(--fox-font-size-2xl); }

/* Avatar group */
.fox-avatar-group {
  display: flex;
}

.fox-avatar-group .fox-avatar {
  margin-left: -8px;
  border: 2px solid var(--fox-bg-raised);
}

.fox-avatar-group .fox-avatar:first-child { margin-left: 0; }

/* --- Progress Bar --- */
.fox-progress {
  height: 8px;
  background: var(--fox-bg-overlay);
  border-radius: var(--fox-radius-full);
  overflow: hidden;
}

.fox-progress-bar {
  height: 100%;
  border-radius: var(--fox-radius-full);
  transition: width var(--fox-transition-slow);
}

.fox-progress-bar.primary { background: var(--fox-primary); }
.fox-progress-bar.success { background: var(--fox-success); }
.fox-progress-bar.warning { background: var(--fox-warning); }
.fox-progress-bar.danger { background: var(--fox-danger); }

/* --- Tooltip --- */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--fox-space-1) var(--fox-space-2);
  background: var(--fox-bg-overlay);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-sm);
  font-size: var(--fox-font-size-xs);
  color: var(--fox-text);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--fox-transition);
  z-index: var(--fox-z-dropdown);
}

[data-tooltip]:hover::after { opacity: 1; }

/* --- Empty State --- */
.fox-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--fox-space-16) var(--fox-space-4);
  text-align: center;
}

.fox-empty svg {
  width: 48px;
  height: 48px;
  color: var(--fox-text-muted);
  margin-bottom: var(--fox-space-4);
  opacity: 0.5;
}

.fox-empty-title {
  font-size: var(--fox-font-size-lg);
  font-weight: 500;
  margin-bottom: var(--fox-space-2);
}

.fox-empty-text {
  font-size: var(--fox-font-size-sm);
  color: var(--fox-text-muted);
  max-width: 360px;
}

/* --- Skeleton Loader --- */
.fox-skeleton {
  background: linear-gradient(90deg,
    var(--fox-bg-overlay) 25%,
    var(--fox-bg-hover) 50%,
    var(--fox-bg-overlay) 75%
  );
  background-size: 200% 100%;
  animation: fox-shimmer 1.5s infinite;
  border-radius: var(--fox-radius);
}

.fox-skeleton-text { height: 14px; margin-bottom: var(--fox-space-2); }
.fox-skeleton-text:last-child { width: 60%; }
.fox-skeleton-title { height: 20px; width: 40%; margin-bottom: var(--fox-space-3); }
.fox-skeleton-avatar { width: 36px; height: 36px; border-radius: var(--fox-radius-full); }
.fox-skeleton-card { height: 120px; }
.fox-skeleton-row { height: 44px; margin-bottom: var(--fox-space-1); }

/* --- Pagination --- */
.fox-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--fox-space-1);
  padding: var(--fox-space-4) 0;
}

.fox-page-btn {
  min-width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius);
  background: transparent;
  color: var(--fox-text-secondary);
  font-size: var(--fox-font-size-sm);
  cursor: pointer;
  transition: all var(--fox-transition);
}

.fox-page-btn:hover { background: var(--fox-bg-hover); color: var(--fox-text); }
.fox-page-btn.active { background: var(--fox-primary); color: white; border-color: var(--fox-primary); }
.fox-page-btn:disabled { opacity: 0.3; cursor: default; }

/* --- Divider --- */
.fox-divider {
  height: 1px;
  background: var(--fox-border);
  margin: var(--fox-space-4) 0;
}

/* --- Tag/Chip --- */
.fox-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--fox-space-1);
  padding: var(--fox-space-1) var(--fox-space-3);
  background: var(--fox-bg-overlay);
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-full);
  font-size: var(--fox-font-size-xs);
  color: var(--fox-text-secondary);
}

.fox-tag-remove {
  width: 14px; height: 14px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  cursor: pointer;
  transition: background var(--fox-transition);
}

.fox-tag-remove:hover { background: var(--fox-danger-bg); color: var(--fox-danger-text); }

/* --- Search Input --- */
.fox-search {
  position: relative;
}

.fox-search svg {
  position: absolute;
  left: var(--fox-space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--fox-text-muted);
  pointer-events: none;
}

.fox-search .fox-input {
  padding-left: var(--fox-space-10);
}

/* --- Accordion --- */
.fox-accordion {
  display: flex;
  flex-direction: column;
}

.fox-accordion-item {
  border-bottom: 1px solid var(--fox-border);
}

.fox-accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--fox-space-4) 0;
  background: none;
  border: none;
  color: var(--fox-text);
  font-size: var(--fox-font-size-sm);
  font-weight: 500;
  cursor: pointer;
  text-align: left;
}

.fox-accordion-trigger:hover { color: var(--fox-primary-text); }

.fox-accordion-trigger svg {
  transition: transform 0.2s ease;
}

.fox-accordion-item.open .fox-accordion-trigger svg {
  transform: rotate(180deg);
}

.fox-accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0;
}

.fox-accordion-item.open .fox-accordion-content {
  max-height: 200px;
  padding-bottom: var(--fox-space-4);
}

/* --- Stepper --- */
.fox-stepper {
  display: flex;
  align-items: center;
  padding: var(--fox-space-6) 0;
}

.fox-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--fox-space-2);
}

.fox-step-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--fox-bg-overlay);
  border: 2px solid var(--fox-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fox-font-size-xs);
  font-weight: 600;
  color: var(--fox-text-muted);
  transition: all 0.3s ease;
}

.fox-step.active .fox-step-dot {
  background: var(--fox-primary-bg);
  border-color: var(--fox-primary);
  color: var(--fox-primary-text);
}

.fox-step.completed .fox-step-dot {
  background: var(--fox-success);
  border-color: var(--fox-success);
  color: white;
}

.fox-step-label {
  font-size: var(--fox-font-size-xs);
  color: var(--fox-text-muted);
  white-space: nowrap;
}

.fox-step.active .fox-step-label { color: var(--fox-primary-text); }
.fox-step.completed .fox-step-label { color: var(--fox-success-text); }

.fox-step-line {
  flex: 1;
  height: 2px;
  background: var(--fox-border);
  margin: 0 var(--fox-space-2);
  margin-bottom: var(--fox-space-6);
  transition: background 0.3s ease;
}

.fox-step-line.active { background: var(--fox-primary); }
.fox-step-line.completed { background: var(--fox-success); }

/* --- Timeline --- */
.fox-timeline {
  position: relative;
  padding-left: var(--fox-space-8);
}

.fox-timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--fox-border);
}

.fox-timeline-item {
  position: relative;
  padding-bottom: var(--fox-space-5);
}

.fox-timeline-item:last-child { padding-bottom: 0; }

.fox-timeline-dot {
  position: absolute;
  left: calc(-1 * var(--fox-space-8) + 2px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--fox-bg-raised);
  z-index: 1;
}

.fox-timeline-content {
  padding-left: var(--fox-space-2);
}

/* --- Code Block --- */
.fox-code-block {
  border: 1px solid var(--fox-border);
  border-radius: var(--fox-radius-lg);
  overflow: hidden;
}

.fox-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--fox-space-2) var(--fox-space-4);
  background: var(--fox-bg-overlay);
  border-bottom: 1px solid var(--fox-border);
}

.fox-code {
  padding: var(--fox-space-4);
  margin: 0;
  overflow-x: auto;
  background: var(--fox-bg);
  font-family: var(--fox-font-mono);
  font-size: var(--fox-font-size-sm);
  line-height: 1.7;
  color: var(--fox-text-secondary);
  tab-size: 2;
}

.fox-code code {
  font-family: inherit;
}

/* --- File Upload Area --- */
.fox-upload-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--fox-space-10) var(--fox-space-4);
  border: 2px dashed var(--fox-border);
  border-radius: var(--fox-radius-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.fox-upload-area:hover {
  border-color: var(--fox-primary);
  background: var(--fox-primary-bg);
}

.fox-upload-area.dragging {
  border-color: var(--fox-primary);
  background: var(--fox-primary-bg);
}

/* ============================================================
   7. UTILITIES
   ============================================================ */
.fox-hidden { display: none !important; }
.fox-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.fox-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fox-break-words { word-wrap: break-word; overflow-wrap: break-word; }
.fox-w-full { width: 100%; }
.fox-relative { position: relative; }
.fox-overflow-hidden { overflow: hidden; }
.fox-cursor-pointer { cursor: pointer; }

/* Spacing utilities */
.fox-m-0 { margin: 0; }
.fox-mt-1 { margin-top: var(--fox-space-1); }
.fox-mt-2 { margin-top: var(--fox-space-2); }
.fox-mt-4 { margin-top: var(--fox-space-4); }
.fox-mt-6 { margin-top: var(--fox-space-6); }
.fox-mt-8 { margin-top: var(--fox-space-8); }
.fox-mb-1 { margin-bottom: var(--fox-space-1); }
.fox-mb-2 { margin-bottom: var(--fox-space-2); }
.fox-mb-4 { margin-bottom: var(--fox-space-4); }
.fox-mb-6 { margin-bottom: var(--fox-space-6); }
.fox-mb-8 { margin-bottom: var(--fox-space-8); }
.fox-p-2 { padding: var(--fox-space-2); }
.fox-p-3 { padding: var(--fox-space-3); }
.fox-p-4 { padding: var(--fox-space-4); }
.fox-p-6 { padding: var(--fox-space-6); }
.fox-px-4 { padding-left: var(--fox-space-4); padding-right: var(--fox-space-4); }
.fox-py-2 { padding-top: var(--fox-space-2); padding-bottom: var(--fox-space-2); }

/* Color utilities */
.fox-text-primary { color: var(--fox-primary-text); }
.fox-text-success { color: var(--fox-success-text); }
.fox-text-warning { color: var(--fox-warning-text); }
.fox-text-danger { color: var(--fox-danger-text); }
.fox-text-info { color: var(--fox-info-text); }
.fox-bg-primary { background: var(--fox-primary-bg); }
.fox-bg-success { background: var(--fox-success-bg); }
.fox-bg-warning { background: var(--fox-warning-bg); }
.fox-bg-danger { background: var(--fox-danger-bg); }

/* ============================================================
   8. ANIMATIONS (expanded from Open Props — 23 animations)
   ============================================================ */

/* Core keyframes */
@keyframes fox-spin { to { transform: rotate(360deg); } }
@keyframes fox-shimmer { to { background-position: -200% 0; } }
@keyframes fox-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes fox-fade-out { from { opacity: 1; } to { opacity: 0; } }
@keyframes fox-scale-in { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
@keyframes fox-scale-up { from { transform: scale(1); } to { transform: scale(1.05); } }
@keyframes fox-scale-down { from { transform: scale(1); } to { transform: scale(0.95); } }

/* Slide keyframes */
@keyframes fox-slide-in-up { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fox-slide-in-down { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fox-slide-in-left { from { opacity: 0; transform: translateX(-16px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fox-slide-in-right { from { opacity: 0; transform: translateX(16px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fox-slide-out-up { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(-16px); } }
@keyframes fox-slide-out-down { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(16px); } }

/* Dynamic keyframes */
@keyframes fox-shake-x { 0%, 100% { transform: translateX(0); } 20% { transform: translateX(-5%); } 40% { transform: translateX(5%); } 60% { transform: translateX(-3%); } 80% { transform: translateX(3%); } }
@keyframes fox-shake-y { 0%, 100% { transform: translateY(0); } 20% { transform: translateY(-5%); } 40% { transform: translateY(5%); } 60% { transform: translateY(-3%); } 80% { transform: translateY(3%); } }
@keyframes fox-bounce { 0%, 20%, 53%, 100% { transform: translateY(0); } 40% { transform: translateY(-15px); } 43% { transform: translateY(-7px); } 70% { transform: translateY(-4px); } }
@keyframes fox-pulse { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(0.95); opacity: 0.8; } }
@keyframes fox-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes fox-ping { 0% { transform: scale(1); opacity: 1; } 75%, 100% { transform: scale(2); opacity: 0; } }
@keyframes fox-wiggle { 0%, 100% { transform: rotate(0deg); } 25% { transform: rotate(-3deg); } 75% { transform: rotate(3deg); } }
@keyframes fox-glow-pulse { 0%, 100% { box-shadow: 0 0 5px var(--fox-primary), 0 0 10px rgba(99,102,241,0.3); } 50% { box-shadow: 0 0 15px var(--fox-primary), 0 0 30px rgba(99,102,241,0.4); } }
@keyframes fox-count-up { from { --fox-count: 0; } }

/* Animation utility classes */
.fox-animate-fade { animation: fox-fade-in 0.3s var(--fox-ease-3); }
.fox-animate-scale { animation: fox-scale-in 0.3s var(--fox-ease-elastic-out-3); }
.fox-animate-slide-up { animation: fox-slide-in-up 0.3s var(--fox-ease-out-3); }
.fox-animate-slide-down { animation: fox-slide-in-down 0.3s var(--fox-ease-out-3); }
.fox-animate-slide-left { animation: fox-slide-in-left 0.3s var(--fox-ease-out-3); }
.fox-animate-slide-right { animation: fox-slide-in-right 0.3s var(--fox-ease-out-3); }
.fox-animate-bounce { animation: fox-bounce 1s var(--fox-ease-bounce); }
.fox-animate-pulse { animation: fox-pulse 2s ease-in-out infinite; }
.fox-animate-float { animation: fox-float 3s ease-in-out infinite; }
.fox-animate-spin { animation: fox-spin 1s linear infinite; }
.fox-animate-ping { animation: fox-ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite; }
.fox-animate-wiggle { animation: fox-wiggle 0.5s ease-in-out; }
.fox-animate-shake-x { animation: fox-shake-x 0.75s var(--fox-ease-out-3); }
.fox-animate-shake-y { animation: fox-shake-y 0.75s var(--fox-ease-out-3); }
.fox-animate-glow { animation: fox-glow-pulse 2s ease-in-out infinite; }

/* Hover micro-interactions */
.fox-hover-lift { transition: transform 0.2s var(--fox-ease-out-3), box-shadow 0.2s var(--fox-ease-out-3); }
.fox-hover-lift:hover { transform: translateY(-2px); box-shadow: var(--fox-shadow-lg); }

.fox-hover-scale { transition: transform 0.15s var(--fox-ease-elastic-out-3); }
.fox-hover-scale:hover { transform: scale(1.02); }

.fox-hover-glow { transition: box-shadow 0.2s ease; }
.fox-hover-glow:hover { box-shadow: 0 0 20px rgba(99,102,241,0.3); }

.fox-hover-bright { transition: filter 0.2s ease; }
.fox-hover-bright:hover { filter: brightness(1.15); }

/* Stagger animation delay utilities (for lists/grids) */
.fox-stagger > :nth-child(1) { animation-delay: 0ms; }
.fox-stagger > :nth-child(2) { animation-delay: 50ms; }
.fox-stagger > :nth-child(3) { animation-delay: 100ms; }
.fox-stagger > :nth-child(4) { animation-delay: 150ms; }
.fox-stagger > :nth-child(5) { animation-delay: 200ms; }
.fox-stagger > :nth-child(6) { animation-delay: 250ms; }
.fox-stagger > :nth-child(7) { animation-delay: 300ms; }
.fox-stagger > :nth-child(8) { animation-delay: 350ms; }
.fox-stagger > :nth-child(n+9) { animation-delay: 400ms; }

/* Reduced motion — respect user preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   8b. GRADIENT UTILITIES
   ============================================================ */
.fox-gradient-brand { background: var(--fox-gradient-brand); }
.fox-gradient-sunset { background: var(--fox-gradient-sunset); }
.fox-gradient-ocean { background: var(--fox-gradient-ocean); }
.fox-gradient-forest { background: var(--fox-gradient-forest); }
.fox-gradient-metal { background: var(--fox-gradient-metal); }

.fox-gradient-text {
  background: var(--fox-gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.fox-gradient-border {
  position: relative;
  border: none;
  background: var(--fox-bg-raised);
  border-radius: var(--fox-radius-lg);
}
.fox-gradient-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: var(--fox-gradient-brand);
  z-index: -1;
}

/* Glow background effect for featured cards */
.fox-glow {
  position: relative;
}
.fox-glow::after {
  content: '';
  position: absolute;
  inset: -1px;
  background: var(--fox-gradient-glow);
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.fox-glow:hover::after { opacity: 1; }

/* ============================================================
   8c. ANIMATED ICON SUPPORT (Line MD / Lordicon / Lucide)
   ============================================================ */

/* Icon container with hover animation */
.fox-icon-animated {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s var(--fox-ease-elastic-out-3);
}
.fox-icon-animated:hover { transform: scale(1.15); }

/* Icon spin on hover */
.fox-icon-spin-hover:hover svg { animation: fox-spin 0.5s var(--fox-ease-out-3); }

/* Icon bounce on hover */
.fox-icon-bounce-hover:hover svg { animation: fox-bounce 0.6s var(--fox-ease-bounce); }

/* Icon wiggle on hover */
.fox-icon-wiggle-hover:hover svg { animation: fox-wiggle 0.4s ease-in-out; }

/* Status indicator with ping */
.fox-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  position: relative;
}
.fox-status-dot.online { background: var(--fox-success); }
.fox-status-dot.offline { background: var(--fox-danger); }
.fox-status-dot.warning { background: var(--fox-warning); }
.fox-status-dot.online::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--fox-success);
  animation: fox-ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}

/* ============================================================
   9. RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .fox-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .fox-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .fox-sidebar {
    transform: translateX(-100%);
    z-index: var(--fox-z-modal);
  }

  .fox-sidebar.open { transform: translateX(0); }

  .fox-main { margin-left: 0 !important; }

  .fox-grid-4,
  .fox-grid-3,
  .fox-grid-2 { grid-template-columns: 1fr; }

  .fox-content { padding: var(--fox-space-4); }

  .fox-modal { margin: var(--fox-space-4); max-width: calc(100% - var(--fox-space-8)); }

  .fox-page-header { flex-direction: column; align-items: flex-start; }

  .fox-topbar { padding: 0 var(--fox-space-4); }

  .fox-table-wrapper { font-size: var(--fox-font-size-xs); }
}

@media (max-width: 480px) {
  .fox-auth-card { padding: var(--fox-space-6); }
  .fox-stat-value { font-size: var(--fox-font-size-2xl); }
}

/* ============================================================
   10. PRINT
   ============================================================ */
@media print {
  .fox-sidebar, .fox-topbar, .fox-toast-container { display: none !important; }
  .fox-main { margin-left: 0 !important; }
  body { background: white; color: black; }
  .fox-card { border: 1px solid #ddd; box-shadow: none; }
}

/* ============================================================
 * =============== FoxUI v3.0 NATIVE 2026 =====================
 * Todo lo siguiente es aditivo. NO modifica v2.0.
 * ============================================================ */

/* ============================================================
   11. OKLCH COLOR SYSTEM + color-mix()
   -----------------------------------------------------------
   OKLCH = perceptually uniform color space (Baseline 2023+).
   Ventaja: interpolacion de colores sin tonos muertos, mejor
   contraste, gamut P3 (mas colores en pantallas modernas).
   color-mix() permite tintes/sombras sin variables adicionales.
   Los tokens oklch son OPT-IN: usa --fox-primary-oklch si
   quieres el color en P3, --fox-primary para HSL clasico.
   ============================================================ */
@supports (color: oklch(0.5 0.2 270)) {
  :root, [data-theme="dark"] {
    --fox-primary-oklch: oklch(0.62 0.20 275);
    --fox-success-oklch: oklch(0.72 0.18 145);
    --fox-warning-oklch: oklch(0.78 0.16 80);
    --fox-danger-oklch: oklch(0.65 0.23 25);
    --fox-info-oklch: oklch(0.72 0.13 215);
  }
  [data-theme="light"] {
    --fox-primary-oklch: oklch(0.55 0.24 275);
    --fox-success-oklch: oklch(0.60 0.20 145);
    --fox-warning-oklch: oklch(0.68 0.18 70);
    --fox-danger-oklch: oklch(0.56 0.24 25);
    --fox-info-oklch: oklch(0.58 0.14 215);
  }
}

/* Utility: mezclar con fondo para tintes 10%/25%/50% sin nuevas vars */
@supports (background: color-mix(in oklch, red, blue)) {
  .fox-tint-primary-10 { background: color-mix(in oklch, var(--fox-primary) 10%, transparent); }
  .fox-tint-primary-25 { background: color-mix(in oklch, var(--fox-primary) 25%, transparent); }
  .fox-tint-success-10 { background: color-mix(in oklch, var(--fox-success) 10%, transparent); }
  .fox-tint-danger-10  { background: color-mix(in oklch, var(--fox-danger) 10%, transparent); }
  /* Border color mezclado con texto para contraste sutil */
  .fox-border-mix { border-color: color-mix(in oklch, var(--fox-border) 60%, var(--fox-text-muted)); }
}

/* ============================================================
   12. FLUID TYPOGRAPHY con clamp()
   -----------------------------------------------------------
   Escala tipografica que se adapta sin media queries.
   Opt-in: usar --fox-fs-*-fluid en lugar de --fox-font-size-*.
   Los tokens originales siguen intactos para proyectos legacy.
   ============================================================ */
:root {
  --fox-fs-xs-fluid:   clamp(0.70rem, 0.68rem + 0.10vw, 0.78rem);
  --fox-fs-sm-fluid:   clamp(0.82rem, 0.80rem + 0.12vw, 0.92rem);
  --fox-fs-base-fluid: clamp(0.94rem, 0.90rem + 0.20vw, 1.05rem);
  --fox-fs-lg-fluid:   clamp(1.05rem, 1.00rem + 0.30vw, 1.20rem);
  --fox-fs-xl-fluid:   clamp(1.15rem, 1.08rem + 0.40vw, 1.35rem);
  --fox-fs-2xl-fluid:  clamp(1.35rem, 1.24rem + 0.55vw, 1.65rem);
  --fox-fs-3xl-fluid:  clamp(1.65rem, 1.48rem + 0.90vw, 2.10rem);
  --fox-fs-4xl-fluid:  clamp(1.95rem, 1.68rem + 1.40vw, 2.75rem);
  /* Escala display (hero) */
  --fox-fs-display-fluid: clamp(2.40rem, 1.90rem + 2.50vw, 4.00rem);
}

/* Clases opt-in para migracion gradual */
.fox-fluid-text       { font-size: var(--fox-fs-base-fluid); }
.fox-fluid-lg         { font-size: var(--fox-fs-lg-fluid); }
.fox-fluid-xl         { font-size: var(--fox-fs-xl-fluid); }
.fox-fluid-h1         { font-size: var(--fox-fs-4xl-fluid); font-weight: 700; line-height: 1.1; letter-spacing: -0.025em; }
.fox-fluid-h2         { font-size: var(--fox-fs-3xl-fluid); font-weight: 600; line-height: 1.15; letter-spacing: -0.02em; }
.fox-fluid-h3         { font-size: var(--fox-fs-2xl-fluid); font-weight: 600; line-height: 1.2; }
.fox-fluid-display    { font-size: var(--fox-fs-display-fluid); font-weight: 800; line-height: 1.05; letter-spacing: -0.03em; }

/* ============================================================
   13. CONTAINER QUERIES (@container)
   -----------------------------------------------------------
   Componentes que responden al ANCHO de su contenedor,
   no al viewport. Ideal para cards reutilizables en layouts
   con y sin sidebar, grids densos, etc.
   Uso: poner .fox-container en el wrapper. El elemento hijo
   cambia con variantes @container.
   ============================================================ */
@supports (container-type: inline-size) {
  .fox-container { container-type: inline-size; container-name: foxc; }

  /* Stat cards que colapsan a layout vertical <320px */
  @container foxc (max-width: 320px) {
    .fox-stat-card { padding: var(--fox-space-3); }
    .fox-stat-value { font-size: var(--fox-font-size-2xl); }
    .fox-stat-icon { width: 32px; height: 32px; }
  }

  /* Cards que crecen tipografia en contenedores grandes */
  @container foxc (min-width: 640px) {
    .fox-card.fox-responsive { padding: var(--fox-space-6); }
    .fox-card.fox-responsive .fox-card-title { font-size: var(--fox-font-size-lg); }
  }

  /* Grid que cambia columnas segun contenedor, no viewport */
  @container foxc (min-width: 800px) {
    .fox-grid-responsive { grid-template-columns: repeat(3, 1fr); }
  }
  @container foxc (min-width: 1200px) {
    .fox-grid-responsive { grid-template-columns: repeat(4, 1fr); }
  }
}

.fox-grid-responsive { display: grid; gap: var(--fox-space-4); grid-template-columns: repeat(2, 1fr); }

/* ============================================================
   14. SCROLL-DRIVEN ANIMATIONS (animation-timeline)
   -----------------------------------------------------------
   Reemplaza AOS.js (26KB JS) con CSS nativo. Chrome 115+,
   Safari 26+, Firefox tras flag. Si no soportado, el elemento
   simplemente se muestra estatico (fallback seguro).
   ============================================================ */
@supports (animation-timeline: scroll()) {
  /* Barra de progreso de lectura (fija arriba) */
  .fox-scroll-progress {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 3px;
    background: var(--fox-primary);
    transform-origin: left center;
    animation: fox-scroll-progress-anim linear;
    animation-timeline: scroll(root);
    z-index: var(--fox-z-toast);
  }
  @keyframes fox-scroll-progress-anim {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
  }

  /* Reveal on scroll — sustituye data-aos */
  .fox-scroll-reveal {
    opacity: 0;
    transform: translateY(24px);
    animation: fox-scroll-reveal-anim linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 30%;
  }
  @keyframes fox-scroll-reveal-anim {
    to { opacity: 1; transform: translateY(0); }
  }

  .fox-scroll-reveal-left {
    opacity: 0;
    transform: translateX(-24px);
    animation: fox-scroll-reveal-left-anim linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 30%;
  }
  @keyframes fox-scroll-reveal-left-anim {
    to { opacity: 1; transform: translateX(0); }
  }

  .fox-scroll-reveal-right {
    opacity: 0;
    transform: translateX(24px);
    animation: fox-scroll-reveal-right-anim linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 30%;
  }
  @keyframes fox-scroll-reveal-right-anim {
    to { opacity: 1; transform: translateX(0); }
  }

  /* Parallax suave (mueve fondo a la mitad de velocidad) */
  .fox-parallax {
    animation: fox-parallax-anim linear;
    animation-timeline: view();
    animation-range: cover;
  }
  @keyframes fox-parallax-anim {
    from { transform: translateY(-8%); }
    to { transform: translateY(8%); }
  }

  /* Zoom-in al acercarse al centro del viewport */
  .fox-scroll-zoom {
    opacity: 0.7;
    transform: scale(0.92);
    animation: fox-scroll-zoom-anim linear both;
    animation-timeline: view();
    animation-range: entry 10% cover 40%;
  }
  @keyframes fox-scroll-zoom-anim {
    to { opacity: 1; transform: scale(1); }
  }

  /* Sticky header que se encoge al scrollear */
  .fox-scroll-shrink {
    animation: fox-scroll-shrink-anim linear both;
    animation-timeline: scroll(root);
    animation-range: 0 200px;
  }
  @keyframes fox-scroll-shrink-anim {
    to {
      padding-block: var(--fox-space-1);
      font-size: 0.9em;
      backdrop-filter: blur(8px);
    }
  }
}

/* ============================================================
   15. VIEW TRANSITIONS API
   -----------------------------------------------------------
   Transiciones suaves entre estados (mismo documento) o
   paginas (cross-document con @view-transition).
   Baseline Chrome 111+, Safari 18+, Firefox flag.
   Como usar SAME-DOC: document.startViewTransition(() => {...})
   y FoxUI aplica los timings/curvas aqui.
   ============================================================ */
@supports (view-transition-name: none) {
  /* Animacion default suave para cualquier transicion */
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: 300ms;
    animation-timing-function: var(--fox-ease-3, cubic-bezier(0.25, 0, 0.3, 1));
  }

  /* Morph para elementos con mismo view-transition-name */
  .fox-vt-morph { view-transition-name: var(--fox-vt, none); }

  /* Fade simple */
  ::view-transition-old(fox-fade) {
    animation: fox-fade-out 200ms var(--fox-ease-3, ease) both;
  }
  ::view-transition-new(fox-fade) {
    animation: fox-fade-in 220ms var(--fox-ease-3, ease) both;
  }

  /* Cross-document transitions (MPA) — OPT-IN.
     Cada proyecto que las quiera activa con su propio CSS:
         @view-transition { navigation: auto; }
     No lo activamos globalmente para no imponer comportamiento
     inesperado a proyectos consumidores del CDN. */
}

/* ============================================================
   16. ANCHOR POSITIONING (tooltips y popovers CSS-native)
   -----------------------------------------------------------
   Reemplaza @floating-ui / popper.js para casos simples.
   Chrome 125+, Safari PENDIENTE (usar fallback JS si critico).
   El fallback visual funciona gracias a `position: absolute`
   clasico en el tooltip v2 que ya existe.
   ============================================================ */
@supports (anchor-name: --a) {
  .fox-anchor { anchor-name: var(--fox-anchor-name, --fox-anchor-default); }

  .fox-anchored-top {
    position: absolute;
    position-anchor: var(--fox-anchor-target, --fox-anchor-default);
    bottom: anchor(top);
    left: anchor(center);
    translate: -50% -6px;
  }
  .fox-anchored-bottom {
    position: absolute;
    position-anchor: var(--fox-anchor-target, --fox-anchor-default);
    top: anchor(bottom);
    left: anchor(center);
    translate: -50% 6px;
  }
  .fox-anchored-right {
    position: absolute;
    position-anchor: var(--fox-anchor-target, --fox-anchor-default);
    left: anchor(right);
    top: anchor(center);
    translate: 6px -50%;
  }
  .fox-anchored-left {
    position: absolute;
    position-anchor: var(--fox-anchor-target, --fox-anchor-default);
    right: anchor(left);
    top: anchor(center);
    translate: -6px -50%;
  }
}

/* ============================================================
   17. POPOVER API NATIVO (.fox-popover)
   -----------------------------------------------------------
   Usa el atributo HTML `popover` + la pseudo-clase :popover-open.
   Chrome 114+, Safari 17+, Firefox 125+. Auto-dismiss con ESC,
   backdrop nativo, top-layer. NO requiere JS para abrir/cerrar.
   Uso:
     <button popovertarget="menu">Open</button>
     <div id="menu" popover class="fox-popover">...</div>
   ============================================================ */
@supports selector(:popover-open) {
  .fox-popover {
    margin: 0;
    padding: var(--fox-space-2);
    background: var(--fox-bg-raised);
    border: 1px solid var(--fox-border);
    border-radius: var(--fox-radius-lg);
    box-shadow: var(--fox-shadow-lg);
    color: var(--fox-text);
    min-width: 180px;
    max-width: 360px;
  }

  .fox-popover:popover-open {
    animation: fox-scale-in 160ms var(--fox-ease-elastic-out-3, ease-out) both;
  }

  .fox-popover::backdrop {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
    animation: fox-fade-in 160ms ease both;
  }

  /* Item dentro del popover — reutiliza estilos de dropdown */
  .fox-popover-item {
    display: flex;
    align-items: center;
    gap: var(--fox-space-2);
    padding: var(--fox-space-2) var(--fox-space-3);
    font-size: var(--fox-font-size-sm);
    border-radius: var(--fox-radius-sm);
    cursor: pointer;
    color: var(--fox-text-secondary);
    transition: background var(--fox-transition);
  }
  .fox-popover-item:hover { background: var(--fox-bg-hover); color: var(--fox-text); }
}

/* ============================================================
   18. @starting-style (transiciones de entrada)
   -----------------------------------------------------------
   Permite transicionar elementos cuando APARECEN en el DOM
   (display:none -> visible, popover abierto, dialog, etc).
   Antes era imposible sin JS tocando requestAnimationFrame.
   Chrome 117+, Safari 17.5+, Firefox 129+.
   ============================================================ */
@supports at-rule(@starting-style) {
  /* Dialog/modal con fade-in al abrirse */
  .fox-dialog-animated[open] {
    opacity: 1;
    transform: scale(1);
    transition:
      opacity 200ms var(--fox-ease-3, ease),
      transform 220ms var(--fox-ease-elastic-out-3, ease-out),
      overlay 200ms allow-discrete,
      display 200ms allow-discrete;
  }
  @starting-style {
    .fox-dialog-animated[open] {
      opacity: 0;
      transform: scale(0.95);
    }
  }
  .fox-dialog-animated::backdrop {
    background: rgba(0, 0, 0, 0.5);
    opacity: 1;
    transition:
      opacity 200ms ease,
      overlay 200ms allow-discrete,
      display 200ms allow-discrete;
  }
  @starting-style {
    .fox-dialog-animated::backdrop { opacity: 0; }
  }

  /* Popover con starting-style — se integra con seccion 17 */
  .fox-popover:popover-open {
    opacity: 1;
    transform: scale(1);
    transition:
      opacity 160ms ease,
      transform 180ms var(--fox-ease-elastic-out-3, ease-out),
      overlay 160ms allow-discrete,
      display 160ms allow-discrete;
  }
  @starting-style {
    .fox-popover:popover-open {
      opacity: 0;
      transform: scale(0.92);
    }
  }
}

/* ============================================================
   19. A11Y 2026 — forced-colors, prefers-contrast, motion
   -----------------------------------------------------------
   Cumple WCAG 2.2 AA + soporte Windows High Contrast Mode.
   ============================================================ */

/* Windows High Contrast / Forced Colors Mode */
@media (forced-colors: active) {
  .fox-btn,
  .fox-card,
  .fox-modal,
  .fox-popover,
  .fox-input,
  .fox-select,
  .fox-textarea {
    border: 1px solid CanvasText;
    forced-color-adjust: none;
  }
  .fox-btn-primary,
  .fox-badge-primary,
  .fox-stat-icon.primary { background: Highlight; color: HighlightText; }
  .fox-sidebar-item.active { background: SelectedItem; color: SelectedItemText; }
  :focus-visible { outline: 2px solid Highlight; outline-offset: 2px; }
}

/* Usuarios que piden MAS contraste */
@media (prefers-contrast: more) {
  :root, [data-theme="dark"] {
    --fox-text-secondary: #d4d4dc;
    --fox-text-muted: #a0a0b4;
    --fox-border: #4a4a60;
    --fox-border-hover: #6a6a80;
  }
  [data-theme="light"] {
    --fox-text-secondary: #27272a;
    --fox-text-muted: #52525b;
    --fox-border: #a1a1aa;
    --fox-border-hover: #71717a;
  }
  .fox-btn { border-width: 2px; }
}

/* Usuarios que piden MENOS contraste (ej. migraña, baja vision) */
@media (prefers-contrast: less) {
  :root, [data-theme="dark"] {
    --fox-text-secondary: #8484a0;
    --fox-text-muted: #505068;
  }
}

/* Reduced transparency (iOS / Windows setting) */
@media (prefers-reduced-transparency: reduce) {
  .fox-modal-backdrop,
  .fox-popover::backdrop,
  .fox-dialog-animated::backdrop {
    backdrop-filter: none;
    background: var(--fox-bg);
  }
}

/* Refinamiento de prefers-reduced-motion:
   respeta scroll-driven animations (no hacen "motion perceptible"
   mas alla del scroll que el usuario ya inicio), pero desactiva
   entrance animations, bounce, float, parallax, ping. */
@media (prefers-reduced-motion: reduce) {
  .fox-parallax,
  .fox-scroll-zoom,
  .fox-animate-bounce,
  .fox-animate-float,
  .fox-animate-ping,
  .fox-animate-glow,
  .fox-animate-pulse { animation: none !important; }
  .fox-hover-scale:hover,
  .fox-hover-lift:hover { transform: none !important; }
}

/* ============================================================
   20. :has() PATTERNS (selector padre — CSS reactivo sin JS)
   -----------------------------------------------------------
   Baseline 2023 en todos los navegadores modernos.
   Permite reglas como "si este card contiene un input
   con error, el card se vuelve rojo" — puro CSS.
   ============================================================ */
@supports selector(:has(*)) {
  /* Card con input invalido -> borde danger */
  .fox-card:has(.fox-input-error, .fox-input:user-invalid) {
    border-color: var(--fox-danger);
  }

  /* Form group con input focuseado -> label activa */
  .fox-form-group:has(.fox-input:focus, .fox-select:focus, .fox-textarea:focus) .fox-label {
    color: var(--fox-primary-text);
  }

  /* Card con checkbox marcado -> fondo selected */
  .fox-card:has(input[type="checkbox"]:checked) {
    border-color: var(--fox-primary);
    background: color-mix(in oklch, var(--fox-bg-raised) 90%, var(--fox-primary));
  }

  /* Sidebar con item activo -> header brilla */
  .fox-sidebar:has(.fox-sidebar-item.active) .fox-sidebar-logo {
    box-shadow: 0 0 0 3px var(--fox-primary-bg);
  }

  /* Layout sin sidebar -> main sin margin-left (auto-detecta) */
  .fox-layout:not(:has(.fox-sidebar)) .fox-main { margin-left: 0; }

  /* Page header con 2+ botones -> gap mas grande */
  .fox-page-header:has(.fox-btn + .fox-btn) { gap: var(--fox-space-3); }

  /* Empty state dentro de card -> sin padding duplicado */
  .fox-card:has(> .fox-empty) { padding: 0; }
}