/* =============================================
   VARIABLES Y CONFIGURACIÓN BASE - MODO OSCURO PERMANENTE
   ============================================= */

:root {
    /* Colores - Paleta Oscura Fija */
    --primary: #FF4A45;
    --primary-hover: #F0544C;
    --primary-light: #A9322A;
    --background: #0F1115;
    --background-secondary: #171A1F;
    --text: #E9ECF1;
    --text-secondary: #B6BCC6;
    --text-hero: #C3C7D1;
    --text-nav: #AAB0BA;
    --text-arrow-left: #C8CDD6;
    --border: #262A33;
    --shadow: rgba(0, 0, 0, 0.5);
    --card-bg: #171A1F;
    --focus: #FF4A45;
    --header-bg: #111318;
    --icon-color: #EAEAEA;
    --moon-icon: #F6C343;

    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Tipografía */
    --font-base: 1rem;
    --font-scale: 1.125;
    --line-height: 1.6;

    /* Bordes y radios */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;

    /* Transiciones */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

/* Alto Contraste - Sobrescribe colores cuando se activa */
body.high-contrast {
    --primary: #FFFF00 !important;
    --primary-hover: #FFEE00 !important;
    --primary-light: #FFFFAA !important;
    --background: #000000 !important;
    --background-secondary: #0A0A0A !important;
    --text: #FFFFFF !important;
    --text-secondary: #FFFFFF !important;
    --text-hero: #FFFFFF !important;
    --text-nav: #FFFFFF !important;
    --border: #FFFFFF !important;
    --card-bg: #000000 !important;
    --header-bg: #000000 !important;
}

/* Tamaños de fuente */
body.font-medium {
    --font-base: 1.125rem;
}

body.font-large {
    --font-base: 1.25rem;
}

/* =============================================
   RESET Y ESTILOS BASE
   ============================================= */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--font-base);
    line-height: var(--line-height);
    color: var(--text);
    background-color: var(--background);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Reducir animaciones si el usuario lo prefiere */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* =============================================
   ENLACES Y BOTONES
   ============================================= */

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover, a:focus {
    color: var(--primary-hover);
    text-decoration: underline;
    outline: 2px solid var(--focus);
    outline-offset: 2px;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    transition: var(--transition-fast);
}

button:focus {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
}

/* Skip Link para accesibilidad */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: var(--background);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: 100;
    border-radius: var(--radius-sm);
}

.skip-link:focus {
    top: var(--spacing-sm);
}

/* =============================================
   HEADER Y NAVEGACIÓN
   ============================================= */

.main-header {
    background: var(--header-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 3px var(--shadow);
}

.navigation {
    padding: var(--spacing-md) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.nav-left {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--text);
    transition: var(--transition-fast);
}

.logo-link:hover {
    transform: translateY(-2px);
}

.logo {
    width: 50px;
    height: 50px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px var(--shadow));
}

.site-title {
    font-size: calc(var(--font-base) * 1.5);
    font-weight: 700;
    color: var(--primary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.home-link {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-md);
    color: var(--text-arrow-left);
    transition: var(--transition-fast);
    text-decoration: none;
}

.home-link:hover {
    background: var(--primary);
    color: var(--background);
    transform: translateX(-4px);
}

/* Controles de Accesibilidad */
.accessibility-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.control-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border);
    background: var(--header-bg);
    color: var(--icon-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(var(--font-base) * 1.25);
    transition: var(--transition-fast);
}

.control-btn:hover {
    background: var(--primary);
    color: var(--background);
    border-color: var(--primary);
    transform: scale(1.1);
}

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

/* Icono especial para la luna */
#theme-btn span {
    color: var(--moon-icon) !important;
}

/* Breadcrumbs */
.breadcrumbs {
    background: var(--background);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border);
}

.breadcrumb-list {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    list-style: none;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    color: var(--text-nav);
    font-size: calc(var(--font-base) * 0.9);
}

.breadcrumb-item::after {
    content: '/';
    margin: 0 var(--spacing-sm);
    color: var(--text-nav);
}

.breadcrumb-item:last-child::after {
    display: none;
}

.breadcrumb-item.active {
    color: var(--primary);
    font-weight: 600;
}

.breadcrumb-item a {
    color: var(--text-nav);
}

.breadcrumb-item a:hover {
    color: var(--primary);
}

/* =============================================
   CONTENIDO PRINCIPAL
   ============================================= */

.main-content {
    flex: 1;
    padding: var(--spacing-2xl) 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
    background: var(--background);
    border-radius: var(--radius-lg);
}

.hero-title {
    font-size: calc(var(--font-base) * 3);
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.6s ease;
}

.hero-description {
    font-size: calc(var(--font-base) * 1.25);
    color: var(--text-hero);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease;
}

/* Stories Section */
.stories-section {
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: calc(var(--font-base) * 2);
    color: var(--primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary);
    border-radius: var(--radius-sm);
}

/* Grid de Cuentos */
.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.story-card {
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    position: relative;
    transition: var(--transition);
    cursor: pointer;
    overflow: hidden;
}

.story-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.story-card:hover, .story-card:focus-within {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--primary-light);
}

.story-card:hover::before {
    transform: scaleX(1);
}

.story-number {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: calc(var(--font-base) * 2);
    font-weight: 700;
    color: var(--primary-light);
    opacity: 0.5;
}

.story-title {
    font-size: calc(var(--font-base) * 1.5);
    color: var(--text);
    margin-bottom: var(--spacing-sm);
}

.story-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.story-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
}

.story-link:hover {
    gap: var(--spacing-sm);
    color: var(--primary-hover);
}

/* About Section */
.about-section {
    background: var(--background-secondary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-2xl);
}

.about-section .section-title {
    color: var(--primary);
}

.about-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: var(--text);
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* =============================================
   FOOTER
   ============================================= */

.main-footer {
    background: var(--header-bg);
    border-top: 2px solid var(--border);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.footer-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-text a {
    color: var(--primary);
}

.footer-dedication {
    color: var(--primary);
    font-style: italic;
    font-size: calc(var(--font-base) * 0.9);
}

/* =============================================
   BOTÓN VOLVER ARRIBA
   ============================================= */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--background);
    border: none;
    border-radius: 50%;
    font-size: calc(var(--font-base) * 1.5);
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 40;
    box-shadow: 0 4px 15px var(--shadow);
}

.back-to-top:hover {
    background: var(--primary-hover);
    transform: translateY(-4px);
}

.back-to-top.show {
    display: flex;
    animation: slideInUp 0.3s ease;
}

/* =============================================
   PLANTILLA DE CUENTO
   ============================================= */

.story-template {
    max-width: 800px;
    margin: 0 auto;
}

.story-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-2xl);
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
}

.story-logo {
    width: 150px;
    height: 150px;
    object-fit: contain;
    margin-bottom: var(--spacing-lg);
    filter: drop-shadow(0 4px 10px var(--shadow));
}

.story-main-title {
    font-size: calc(var(--font-base) * 2.5);
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.story-content {
    background: var(--card-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    line-height: 2;
    font-size: calc(var(--font-base) * 1.1);
    color: var(--text);
}

.story-content p {
    margin-bottom: var(--spacing-lg);
    text-indent: 2em;
}

.story-content p:first-child {
    text-indent: 0;
}

.story-content p:first-child::first-letter {
    font-size: calc(var(--font-base) * 4);
    float: left;
    line-height: 1;
    margin-right: var(--spacing-sm);
    color: var(--primary);
    font-weight: 700;
}

.story-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
}

.nav-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary);
    color: var(--background);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-btn:hover {
    background: var(--primary-hover);
    transform: translateX(-4px);
}

.nav-btn.next:hover {
    transform: translateX(4px);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.nav-btn.center:hover {
    background: var(--primary);
    color: var(--background);
}

/* =============================================
   ANIMACIONES
   ============================================= */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

/* =============================================
   RESPONSIVE DESIGN
   ============================================= */

/* Tablet */
@media (max-width: 768px) {
    :root {
        --font-base: 0.95rem;
    }

    .nav-container {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-right {
        width: 100%;
        justify-content: space-between;
    }

    .hero-title {
        font-size: calc(var(--font-base) * 2.5);
    }

    .stories-grid {
        grid-template-columns: 1fr;
    }

    .story-navigation {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Mobile */
@media (max-width: 480px) {
    :root {
        --font-base: 0.9rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
    }

    .site-title {
        font-size: calc(var(--font-base) * 1.25);
    }

    .hero-title {
        font-size: calc(var(--font-base) * 2);
    }

    .hero-description {
        font-size: var(--font-base);
    }

    .control-btn {
        width: 36px;
        height: 36px;
        font-size: var(--font-base);
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: var(--spacing-lg);
        right: var(--spacing-lg);
    }

    .story-card {
        padding: var(--spacing-lg);
    }

    .breadcrumb-item {
        font-size: calc(var(--font-base) * 0.85);
    }
}

/* =============================================
   PRINT STYLES
   ============================================= */

@media print {
    .main-header,
    .back-to-top,
    .accessibility-controls,
    .story-navigation,
    .breadcrumbs {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }

    .story-content {
        page-break-inside: avoid;
    }

    a {
        color: #000;
        text-decoration: underline;
    }

    .story-card {
        page-break-inside: avoid;
        border: 1px solid #000;
        margin-bottom: 1cm;
    }
}