/* ==========================================================================
   ZeroChat Design Tokens - Variables Semánticas y Paleta de Diseño
   ========================================================================== */
:root {
  /* Paleta Base y Acentos */
  --primary: #2563eb;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-rgb: 37, 99, 235;

  /* Fondos y Superficies (Modo Claro) */
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-surface-subtle: #f1f5f9;
  --bg-assistant-bubble: #ffffff;
  --bg-user-bubble: #2563eb;
  --bg-hover: #f1f5f9;
  --bg-main: #f8fafc;

  /* Tipografía y Textos */
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-user: #ffffff;

  /* Bordes y Separadores */
  --border-color: #e2e8f0;
  --border-subtle: #edf2f7;
  --border-focus: #2563eb;
  --border-hover: #cbd5e1;

  /* Controles de Formulario (Inputs y Combos) */
  --input-bg: var(--bg-surface);
  --input-bg-subtle: var(--bg-surface-subtle);
  --input-border: var(--border-color);
  --input-border-hover: var(--border-hover);
  --input-border-focus: var(--border-focus);
  --input-focus-ring: 0 0 0 3px rgba(var(--primary-rgb), 0.16);

  /* Estados de Notificación / Acción */
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fef2f2;
  --danger-subtle: rgba(239, 68, 68, 0.12);
  --success: #10b981;
  --success-light: #f0fdf4;
  --warning: #f59e0b;
  --warning-light: #fffbeb;

  /* Transiciones */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Scrollbars */
  --scrollbar-thumb: rgba(148, 163, 184, 0.4);
  --scrollbar-thumb-hover: rgba(148, 163, 184, 0.7);

  /* Código y Sintaxis */
  --code-bg: #f1f5f9;
  --code-text: #0f172a;

  /* Sombras y Elevación */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.04);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.08);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.06);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-composer: 0 4px 20px -2px rgba(0, 0, 0, 0.07), 0 2px 6px -1px rgba(0, 0, 0, 0.04);

  /* Radios de Curvatura */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Tipografía Modular */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Capas Z-Index */
  --z-base: 1;
  --z-header: 100;
  --z-sidebar: 110;
  --z-modal-backdrop: 200;
  --z-modal: 210;
  --z-toast: 300;

  /* Viewport y Layout */
  --header-height: 3.5rem;
  --max-content-width: 68rem;
  --app-height: 100dvh;

  /* Tokens para glassmorphism (rgba sobre variables) */
  --bg-surface-rgb: 255, 255, 255;
  --header-bg-alpha: 0.82;
}

/* ==========================================================================
   Modo Oscuro (Dark Theme Tokens)
   ========================================================================== */
[data-theme="dark"] {
  --primary: #3b82f6;
  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: rgba(59, 130, 246, 0.18);
  --primary-rgb: 59, 130, 246;

  --bg-app: #090d16;
  --bg-surface: #131b2e;
  --bg-surface-elevated: #1a243b;
  --bg-surface-subtle: #182238;
  --bg-assistant-bubble: #182238;
  --bg-user-bubble: #2563eb;
  --bg-hover: #1e293b;
  --bg-main: #090d16;

  --text-user: #ffffff;
  --text-main: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --border-color: #27354f;
  --border-subtle: #1e293b;
  --border-focus: #60a5fa;
  --border-hover: #3b4d6b;

  /* Controles de Formulario Modo Oscuro */
  --input-bg: #0b1120;
  --input-bg-subtle: #182238;
  --input-border: var(--border-color);
  --input-border-hover: var(--border-hover);
  --input-border-focus: var(--border-focus);
  --input-focus-ring: 0 0 0 3px rgba(var(--primary-rgb), 0.25);

  --danger: #f87171;
  --danger-hover: #ef4444;
  --danger-light: rgba(248, 113, 113, 0.15);
  --danger-subtle: rgba(248, 113, 113, 0.18);
  --success: #34d399;
  --success-light: rgba(52, 211, 153, 0.15);
  --warning: #fbbf24;
  --warning-light: rgba(251, 191, 36, 0.15);

  --scrollbar-thumb: rgba(100, 116, 139, 0.4);
  --scrollbar-thumb-hover: rgba(100, 116, 139, 0.7);

  --code-bg: #0b1120;
  --code-text: #f8fafc;

  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.25);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.35);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.45), 0 2px 4px -2px rgb(0 0 0 / 0.45);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.55), 0 4px 6px -4px rgb(0 0 0 / 0.55);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.65), 0 8px 10px -6px rgb(0 0 0 / 0.55);
  --shadow-composer: 0 4px 20px -2px rgba(0, 0, 0, 0.45), 0 2px 6px -1px rgba(0, 0, 0, 0.35);

  /* Tokens para glassmorphism modo oscuro */
  --bg-surface-rgb: 19, 27, 46;   /* #131b2e descompuesto */
  --header-bg-alpha: 0.85;
}