/* Estilos globales del POS Supermercado - Sistema de diseño profesional */
:root {
  /* Paleta primaria (base/brand) */
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;

  /* Paleta secundaria (acentos/interacciones) */
  --secondary-50: #f0fdf4;
  --secondary-100: #dcfce7;
  --secondary-200: #bbf7d0;
  --secondary-300: #86efac;
  --secondary-400: #4ade80;
  --secondary-500: #22c55e;
  --secondary-600: #16a34a;
  --secondary-700: #15803d;
  --secondary-800: #166534;
  --secondary-900: #14532d;

  /* Paleta terciaria (neutros/bordes) */
  --tertiary-50: #f8fafc;
  --tertiary-100: #f1f5f9;
  --tertiary-200: #e2e8f0;
  --tertiary-300: #cbd5e1;
  --tertiary-400: #94a3b8;
  --tertiary-500: #64748b;
  --tertiary-600: #475569;
  --tertiary-700: #334155;
  --tertiary-800: #1f2937;
  --tertiary-900: #0f172a;

  /* Tokens semánticos (propagación automática) */
  --bg-page: var(--tertiary-50);
  --fg-text: var(--tertiary-900);
  --text-muted: var(--tertiary-600);
  --surface: #ffffff;
  --header-bg: var(--primary-700);
  --header-text: #ffffff;
  --action-bg: var(--primary-600);
  --action-bg-hover: var(--primary-700);
  --action-text: #ffffff;
  --accent-bg: var(--secondary-600);
  --accent-bg-hover: var(--secondary-700);
  --accent-text: #ffffff;
  --border-color: var(--tertiary-200);
  --focus-ring: var(--secondary-400);
  --error-bg: #fee;
  --error-text: #b00020;
  --error-border: #fcc;

  /* Espaciado y tipografía */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-size-base: 16px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  margin: 0;
  background: var(--bg-page);
  color: var(--fg-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Contenedor base */
.container { max-width: 960px; margin: 0 auto; padding: var(--space-6); }

/* Cabeceras */
.header {
  background: var(--header-bg);
  color: var(--header-text);
  padding: var(--space-6);
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.header-accent { background: var(--accent-bg); color: var(--accent-text); }

/* Tarjetas */
.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  border: 1px solid var(--border-color);
}

/* Botones */
.btn {
  display: inline-block;
  background: var(--action-bg);
  color: var(--action-text);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: filter 0.15s ease, transform 0.06s ease;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }
.btn-secondary { background: var(--accent-bg); color: var(--accent-text); }
.btn-secondary:hover { background: var(--accent-bg-hover); }
.btn-tertiary {
  background: transparent;
  color: var(--fg-text);
  border: 1px solid var(--border-color);
}
.btn-tertiary:hover { background: var(--tertiary-100); }

/* Texto y utilidades */
.text-muted { color: var(--text-muted); }
.lead { font-size: 1.125rem; color: var(--tertiary-700); }
.h3 { font-size: 1.25rem; margin: 0; }

/* Formularios */
label { font-weight: 600; color: var(--tertiary-700); }
input[type="text"], input[type="password"], input[type="email"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--surface);
  color: var(--fg-text);
  box-shadow: var(--shadow-sm);
}
input:focus {
  outline: none;
  border-color: var(--focus-ring);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--focus-ring) 35%, transparent);
}

/* Campos y alertas */
.field { display: grid; gap: var(--space-2); }
.field > span { font-weight: 600; color: var(--tertiary-700); }
.alert-error { background: var(--error-bg); color: var(--error-text); border: 1px solid var(--error-border); padding: var(--space-3); border-radius: var(--radius-sm); }

/* Página de autenticación centrada y con animación de fondo */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; position: relative; padding: var(--space-6); }
.card-auth { max-width: 480px; width: 100%; z-index: 1; }
.auth-animated-bg {
  background:
    radial-gradient(800px 500px at 20% 20%, color-mix(in oklab, var(--primary-300) 40%, transparent), transparent 60%),
    radial-gradient(800px 500px at 80% 80%, color-mix(in oklab, var(--primary-400) 35%, transparent), transparent 60%);
  animation: authBgMove 12s ease-in-out infinite alternate;
}
@keyframes authBgMove {
  0% { background-position: 20% 20%, 80% 80%; }
  100% { background-position: 30% 10%, 70% 90%; }
}

/* Texto sobre fondos acentuados (alto contraste) */
.text-on-accent { color: #f9fafb; text-shadow: 0 1px 2px rgba(0,0,0,0.18); }
.text-on-header { color: var(--header-text); text-shadow: 0 1px 2px rgba(0,0,0,0.18); }

/* Visibilidad de contraseña (eye toggle) */
.field.has-password .password-wrapper { position: relative; }
.field.has-password input[type="password"],
.field.has-password input[type="text"] { padding-right: 44px; }
.toggle-visibility { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); background: transparent; border: none; color: var(--tertiary-600); cursor: pointer; padding: 6px; border-radius: var(--radius-sm); }
.toggle-visibility:hover { color: var(--tertiary-700); background: var(--tertiary-100); }
.toggle-visibility svg { width: 20px; height: 20px; display: inline-block; }
.toggle-visibility .eye-closed { display: none; }
.toggle-visibility.is-showing .eye-open { display: none; }
.toggle-visibility.is-showing .eye-closed { display: inline-block; }

/* Layout auxiliares */
.row { display: flex; gap: var(--space-4); align-items: center; }
.stack { display: grid; gap: var(--space-3); }
.space { height: var(--space-6); }

/* Variantes compactas */
.container.compact { padding: var(--space-3); }
.header-compact { padding: var(--space-4); }
.card-compact { padding: var(--space-4); }
.stack-compact { gap: var(--space-2); }
.row-compact { gap: var(--space-2); }
.row-between { justify-content: space-between; }
.user-compact { font-size: 0.875rem; }

/* Botón/icono compacto de cerrar sesión */
.btn-icon { display: inline-flex; align-items: center; gap: var(--space-2); background: transparent; color: var(--header-text); border: 1px solid rgba(255,255,255,0.25); padding: 6px 10px; border-radius: var(--radius-sm); text-decoration: none; }
.btn-icon:hover { background: rgba(255,255,255,0.10); }
.btn-icon svg { width: 18px; height: 18px; }
.btn-xs { padding: 4px 8px; font-size: 0.875rem; }
.optional-label { display: inline-block; }
@media (max-width: 520px){ .optional-label { display:none; } }

/* Tablas y formularios (consistencia) */
.table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.table th, .table td { border: 1px solid var(--border-color); padding: 8px 10px; text-align: left; }
.table-striped tbody tr:nth-child(odd) { background: var(--tertiary-100); }
.table-compact th, .table-compact td { padding: 6px 8px; }
.input-xs { padding: 8px 10px; font-size: 0.95rem; }
.field-compact > label { font-size: 0.9rem; }
.field-compact > input { margin-top: 4px; }

/* Grupo de botones */
.btn-group { display: inline-flex; gap: var(--space-2); }