/**
 * ============================================================================
 * CRITERIA BASE CSS - Universal Standards (criterios.md v1.0)
 * ============================================================================
 * 
 * Este archivo contiene los estilos base obligatorios para cumplir con los
 * criterios de maquetación universal. Todos los temas DEBEN importar este
 * archivo al inicio de su style.css.
 * 
 * USO: @import url('/themes/_shared/criteria-base.css');
 * 
 * CRITERIOS CUBIERTOS:
 * 1. Experiencia Móvil y Adaptabilidad
 * 2. Navegación Escalable y UX
 * 3. Accesibilidad Avanzada (A11y)
 * 4. Rendimiento y Core Web Vitals
 * 5. SEO Técnico (estructura visual)
 * 7. Estrategia de Datos (visual)
 * 8. Visualización y Engagement
 */

/* ============================================================================
   CRITERIO 1: Experiencia Móvil y Adaptabilidad
   ============================================================================ */

:root {
    /* === Touch-Friendly Spacing === */
    --touch-target-min: 44px;
    /* Mínimo WCAG para touch targets */
    --touch-padding: 12px;
    /* Padding mínimo entre elementos táctiles */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* === Fluid Typography with clamp() === */
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.4vw, 1rem);
    --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1rem + 1vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
    --font-size-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
    --font-size-4xl: clamp(2.5rem, 2rem + 3vw, 4rem);
    --font-size-hero: clamp(2.5rem, 1.5rem + 5vw, 5rem);

    /* === Transition Curves === */
    --transition: cubic-bezier(0.2, 0.8, 0.2, 1);
    --transition-fast: 0.15s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* === Animation Durations === */
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
}

/* === Base Reset === */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* === Touch-Friendly Interactive Elements === */
a,
button,
input,
select,
textarea,
[role="button"],
[tabindex]:not([tabindex="-1"]) {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
}

/* Enlaces con padding suficiente */
a:not(.logo):not(.btn):not(.card):not(.article-link) {
    padding: var(--spacing-xs) 0;
    display: inline-flex;
    align-items: center;
}

/* Botones con padding táctil */
button,
.btn,
[role="button"] {
    padding: var(--touch-padding) var(--spacing-lg);
    cursor: pointer;
    touch-action: manipulation;
}

/* ============================================================================
   CRITERIO 3: Accesibilidad Avanzada (A11y)
   ============================================================================ */

/* === Skip Link (Saltar al contenido principal) === */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent, #3b82f6);
    color: white;
    padding: var(--touch-padding) var(--spacing-xl);
    border-radius: 0 0 8px 8px;
    z-index: 9999;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.3s var(--transition);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
}

.skip-link:focus {
    top: 0;
    outline: none;
}

/* === Focus Styles (WCAG 2.1 AA Compliant) === */
*:focus-visible {
    outline: 3px solid var(--accent, #3b82f6);
    outline-offset: 2px;
}

/* Focus para elementos oscuros */
[data-theme="dark"] *:focus-visible {
    outline-color: var(--accent, #60a5fa);
}

/* === Screen Reader Only (sr-only) === */
.sr-only,
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* === ARIA Live Region Styles === */
[role="status"],
[aria-live] {
    /* 
     * Visible solo para lectores de pantalla por defecto.
     * No se requieren estilos adicionales ya que usualmente son .sr-only 
     */
    visibility: visible;
}

/* === High Contrast Mode Support === */
@media (prefers-contrast: high) {
    :root {
        --border-width: 2px;
    }

    a,
    button {
        text-decoration: underline;
    }

    *:focus-visible {
        outline-width: 4px;
    }
}

/* === Reduced Motion Support === */
@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;
    }
}

/* ============================================================================
   CRITERIO 2: Navegación Escalable y UX
   ============================================================================ */

/* === Breadcrumbs === */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    flex-wrap: wrap;
    padding: var(--spacing-md) 0;
}

.breadcrumbs a {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus {
    background: rgba(0, 0, 0, 0.05);
}

.breadcrumbs .separator {
    user-select: none;
    opacity: 0.5;
}

.breadcrumbs .current {
    font-weight: 600;
}

/* === Navigation Drawer Base === */
.nav-drawer {
    position: fixed;
    top: 0;
    width: min(400px, 90vw);
    height: 100vh;
    height: 100dvh;
    z-index: 2000;
    transition: transform 0.4s var(--transition);
    display: flex;
    flex-direction: column;
    touch-action: pan-y;
    overflow: hidden;
}

.nav-drawer[data-position="left"] {
    left: 0;
    transform: translateX(-100%);
}

.nav-drawer[data-position="right"] {
    right: 0;
    transform: translateX(100%);
}

.nav-drawer.active {
    transform: translateX(0);
}

/* Swipe gesture support */
.nav-drawer.swiping {
    transition: none;
}

/* Drawer content scroll */
.drawer-content {
    flex: 1;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
}

/* Drawer overlay */
.drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

.drawer-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* === Dropdown Menu Base === */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-height: var(--touch-target-min);
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    min-width: 200px;
    max-height: 400px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s var(--transition);
    z-index: 1001;
}

.dropdown:hover .dropdown-menu,
.dropdown-toggle:focus+.dropdown-menu,
.dropdown-menu:focus-within {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ============================================================================
   CRITERIO 4: Rendimiento y Core Web Vitals
   ============================================================================ */

/* === Responsive Images === */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Aspect ratio containers para evitar CLS */
.aspect-16-9 {
    aspect-ratio: 16 / 9;
}

.aspect-4-3 {
    aspect-ratio: 4 / 3;
}

.aspect-1-1 {
    aspect-ratio: 1 / 1;
}

.aspect-3-4 {
    aspect-ratio: 3 / 4;
}

/* Cover images */
.img-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Lazy loading placeholder */
img[loading="lazy"] {
    background: linear-gradient(90deg,
            rgba(0, 0, 0, 0.04) 25%,
            rgba(0, 0, 0, 0.08) 50%,
            rgba(0, 0, 0, 0.04) 75%);
    background-size: 200% 100%;
}

/* ============================================================================
   CRITERIO 8: Visualización y Engagement
   ============================================================================ */

/* === Skeleton Screens === */
.skeleton {
    background: linear-gradient(90deg,
            rgba(0, 0, 0, 0.06) 25%,
            rgba(0, 0, 0, 0.10) 50%,
            rgba(0, 0, 0, 0.06) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
    border-radius: 4px;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-image {
    aspect-ratio: 16/9;
    width: 100%;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* Dark mode skeleton */
[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg,
            rgba(255, 255, 255, 0.04) 25%,
            rgba(255, 255, 255, 0.08) 50%,
            rgba(255, 255, 255, 0.04) 75%);
    background-size: 200% 100%;
}

/* === Micro-interactions Base === */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--transition), transform 0.6s var(--transition);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hover effects base */
.hover-lift {
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.15);
}

.hover-scale {
    transition: transform var(--transition-medium);
}

.hover-scale:hover {
    transform: scale(1.02);
}

/* === Dark Mode Support === */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
    }
}

[data-theme="dark"] {
    color-scheme: dark;
}

[data-theme="light"] {
    color-scheme: light;
}

/* === Share Buttons Base === */
.share-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    border-radius: 50%;
    text-decoration: none;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.share-btn:hover {
    transform: scale(1.1);
}

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

/* Floating share container */
.floating-share {
    position: fixed;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 100;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity var(--transition-medium), transform var(--transition-medium);
    pointer-events: none;
}

.floating-share.visible {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

/* Left position (default) */
.floating-share[data-position="left"] {
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%) translateX(-20px);
}

.floating-share[data-position="left"].visible {
    transform: translateY(-50%) translateX(0);
}

/* Right position */
.floating-share[data-position="right"] {
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%) translateX(20px);
}

.floating-share[data-position="right"].visible {
    transform: translateY(-50%) translateX(0);
}

/* === Reading Progress Bar === */
.reading-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 9999;
    background: transparent;
}

.reading-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent, #3b82f6);
    transition: width 0.1s linear;
}

/* ============================================================================
   UTILITIES
   ============================================================================ */

/* === Containers === */
.container {
    width: 100%;
    max-width: var(--container-max, 1200px);
    margin-inline: auto;
    padding-inline: var(--spacing-lg);
}

.container-sm {
    max-width: 640px;
}

.container-md {
    max-width: 768px;
}

.container-lg {
    max-width: 1024px;
}

.container-xl {
    max-width: 1280px;
}

/* === Print Styles === */
@media print {

    .skip-link,
    .nav-drawer,
    .drawer-overlay,
    .floating-share,
    .reading-progress-container {
        display: none !important;
    }

    body {
        font-size: 12pt;
    }

    a {
        text-decoration: underline;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 80%;
    }
}