/* ==========================================================================
   Trato Hecho — Storefront design system
   Modo: Persuade. UI en español. Mobile-first.
   Colores claros / oscuros definidos por [data-theme].
   ========================================================================== */

:root {
  /* Colores principales (claro) */
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-border: #e9ecef;
  --color-card-bg: #ffffff;

  /* Estados */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  /* Sombras */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);

  /* Bordes */
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transiciones */
  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  /* Curva con frenada natural: se usa para todo lo que responde al usuario */
  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-press: 120ms;
  --dur-base: 220ms;

  /* Tipografía */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;

  /* Espaciado */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Layout */
  --container-max: 1200px;
  --sidebar-width: 260px;
  --header-height: 72px;
}

/* Modo oscuro */
[data-theme="dark"] {
  --color-bg: #111827;
  --color-bg-alt: #1f2937;
  --color-text: #f3f4f6;
  --color-text-muted: #9ca3af;
  --color-border: #374151;
  --color-card-bg: #1f2937;
  --color-primary-light: #1e3a5f;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  /* La respuesta al toque es inmediata; el resto puede tardar un poco más */
  transition: transform var(--dur-press) var(--ease-spring),
              box-shadow var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out);
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-light);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
}

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

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Tarjetas */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.badge-success { background: #ecfdf5; color: var(--color-success); }
.badge-warning { background: #fbf4da; color: var(--color-warning); }
.badge-danger { background: #fef2f2; color: var(--color-danger); }
.badge-info { background: #eff6ff; color: var(--color-info); }
.badge-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* Inputs */
.form-field {
  margin-bottom: var(--space-4);
}

.form-field label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: var(--space-3);
  font-size: var(--font-size-base);
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Casilla de consentimiento del aviso de privacidad */
.consent {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--color-text-muted);
}

.consent input[type="checkbox"] {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  margin: 0;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.consent label {
  cursor: pointer;
  margin: 0;
  font-weight: 400;
  color: var(--color-text-muted);
}

.consent a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.consent.is-invalid label {
  color: var(--color-danger);
}

/* Iconos inline SVG */
.icon {
  width: 1.25em;
  height: 1.25em;
  display: inline-block;
  vertical-align: -0.15em;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  flex-shrink: 0;
  transition: color 0.2s var(--ease-out);
}

.icon-lg { width: 1.75em; height: 1.75em; }
.icon-xl { width: 2.5em; height: 2.5em; }
.icon-24 { width: 1.5rem; height: 1.5rem; }
.icon-20 { width: 1.25rem; height: 1.25rem; }
.icon-16 { width: 1rem; height: 1rem; }

.icon-filled { fill: currentColor; stroke: none; }
.icon-muted { color: var(--color-text-muted); }

.icon-btn svg {
  transition: transform 160ms var(--ease-out);
}

.icon-btn:active svg {
  transform: scale(0.95);
}

/* Utilidades */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.block { display: block; }
.hidden { display: none !important; }
.inline-block { display: inline-block; }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }

.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.absolute { position: absolute; }

.w-full { width: 100%; }
.max-w-xs { max-width: 320px; }

/* Reducido de movimiento */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Hover solo en dispositivos con puntero fino */
@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover {
    transform: translateY(-1px);
  }
}

/* ==========================================================================
   Tipografía y movimiento (detalles que hacen que se sienta una app)
   ========================================================================== */

h1, h2, h3 {
  /* El tracking se afina al crecer el tamaño: letras grandes muy separadas se ven flojas */
  letter-spacing: -0.015em;
}

h1 {
  letter-spacing: -0.025em;
  line-height: 1.15;
}

p {
  text-wrap: pretty;
}

/* Todo lo que se toca responde al instante, no al soltar */
.chip,
.qty-btn,
.offer-card,
.thumb,
.product-card,
.account-menu a,
.account-menu button,
.settings-link {
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--dur-press) var(--ease-spring),
              background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}

.chip:active,
.qty-btn:active,
.offer-card:active,
.thumb:active,
.settings-link:active {
  transform: scale(0.97);
}

/* Elevación suave al pasar el ratón: solo donde hay puntero fino */
@media (hover: hover) and (pointer: fine) {
  .product-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
  }
}

/* Entradas y salidas con frenada natural, nunca lineales */
.settings-dialog[open] {
  animation: dialog-in 240ms var(--ease-spring);
}

@keyframes dialog-in {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ==========================================================================
   Accesibilidad: menos movimiento, menos transparencia, más contraste
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Sin desplazamientos: solo cambios de opacidad, que no marean */
  .btn:active,
  .chip:active,
  .qty-btn:active,
  .offer-card:active,
  .thumb:active,
  .settings-link:active,
  .product-card:hover {
    transform: none !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .header,
  [data-theme="dark"] .header {
    background: var(--color-bg);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .settings-dialog::backdrop,
  .backdrop {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

@media (prefers-contrast: more) {
  .header,
  [data-theme="dark"] .header {
    background: var(--color-bg);
    backdrop-filter: none;
    border-bottom-color: var(--color-text);
  }

  .settings-dialog,
  .account-menu,
  .card {
    border: 1px solid var(--color-text);
  }
}