/* ============================================================
   style.css — Blog Engine
   Diseño editorial moderno con dark mode nativo
   ============================================================ */

/* ── Variables — Light (default) ────────────────────────── */
:root {
    /* Paleta cálida y confiable para guía de padres */
    --color-primary:    #1a3c5e;   /* azul marino profundo — confianza */
    --color-accent:     #f97316;   /* naranja cálido — cercanía, energía */
    --color-accent-2:   #10b981;   /* verde esmeralda — salud, crecimiento */
    --color-text:       #334155;   /* slate — legible, no agresivo */
    --color-muted:      #64748b;
    --color-border:     #e2e8f0;
    --color-bg:         #fafaf9;   /* blanco cálido */
    --color-bg-alt:     #f0f7f4;   /* mint muy suave */
    --color-bg-dark:    #0f2d40;   /* azul-teal oscuro */
    --color-surface:    #ffffff;
    --color-card-hover: #f0f7f4;

    /* Fuentes del sistema — sin depender de internet */
    --font-sans:    'Segoe UI Variable', 'Segoe UI', system-ui, -apple-system,
                    BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    --font-serif:   Georgia, 'Times New Roman', serif;

    --max-width-article: 740px;
    --max-width-grid:    1900px;
    --header-height:     68px;

    --radius:       12px;
    --radius-sm:    8px;
    --shadow:       0 2px 16px rgba(26,60,94,0.07);
    --shadow-hover: 0 10px 32px rgba(26,60,94,0.13);
    --transition:   0.2s ease;
}

/* ── Dark mode ───────────────────────────────────────────── */
[data-theme="dark"] {
    --color-primary:    #e2f0fb;
    --color-accent:     #fb923c;   /* naranja más suave en dark */
    --color-text:       #cbd5e1;
    --color-muted:      #94a3b8;
    --color-border:     #1e3a52;
    --color-bg:         #0d2233;
    --color-bg-alt:     #122a3d;
    --color-bg-dark:    #081929;
    --color-surface:    #122a3d;
    --color-card-hover: #1a3a52;
    --shadow:       0 2px 12px rgba(0,0,0,0.45);
    --shadow-hover: 0 8px 28px rgba(0,0,0,0.55);
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
    margin: 0; padding: 0;
    overflow-x: hidden;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    transition: background var(--transition), color var(--transition);
}
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 700;
    line-height: 1.3;
    margin-top: 0;
    color: var(--color-primary);
}
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
p { margin: 0 0 1.2em; }
ul, ol { padding-left: 1.5rem; }
li { margin-bottom: 0.3em; }

/* ── Contenedor ──────────────────────────────────────────── */
.container {
    max-width: var(--max-width-grid);
    width: min(100%, var(--max-width-grid));
    margin: 0 auto;
    padding: 2rem clamp(1rem, 2vw, 2rem);
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
    position: sticky;
    top: 0; z-index: 100;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
    display: flex; align-items: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: background var(--transition), border-color var(--transition);
}
.header-inner {
    max-width: var(--max-width-grid);
    width: 100%; margin: 0 auto;
    padding: 0 1.5rem;
    display: flex; align-items: center; gap: 1.5rem;
}
.site-logo {
    font-size: 1.15rem; font-weight: 800;
    color: var(--color-primary);
    text-decoration: none;
    white-space: nowrap; flex-shrink: 0;
    letter-spacing: -0.02em;
}
.site-logo:hover { color: var(--color-accent); text-decoration: none; }

/* Nav */
.site-nav { display: flex; gap: 0.15rem; flex-wrap: nowrap; overflow: hidden; }
.site-nav a {
    color: var(--color-muted);
    font-size: 0.875rem; font-weight: 500;
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: color var(--transition), background var(--transition);
}
.site-nav a:hover, .site-nav a.active {
    color: var(--color-primary);
    background: var(--color-bg-alt);
    text-decoration: none;
}

/* Header actions */
.header-actions {
    margin-left: auto;
    display: flex; align-items: center; gap: 0.5rem;
    flex-shrink: 0;
}

/* Buscador */
.search-form {
    display: flex; align-items: center; gap: 0.25rem;
}
.search-form input[type="search"] {
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 0.38rem 1rem;
    font-size: 0.85rem;
    outline: none;
    width: 155px;
    transition: width var(--transition), border-color var(--transition), background var(--transition);
    background: var(--color-bg-alt);
    color: var(--color-text);
    font-family: var(--font-sans);
}
.search-form input[type="search"]:focus {
    width: 220px;
    border-color: var(--color-accent);
    background: var(--color-bg);
}
.search-form button {
    background: none; border: none; cursor: pointer;
    color: var(--color-muted); padding: 0.3rem;
    display: flex; align-items: center;
    transition: color var(--transition);
}
.search-form button:hover { color: var(--color-accent); }

/* Dark mode toggle */
.theme-toggle {
    width: 34px; height: 34px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-alt);
    color: var(--color-muted);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    flex-shrink: 0;
}
.theme-toggle:hover { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }

/* Menú mobile toggle */
.menu-toggle {
    display: none;
    background: none; border: none;
    font-size: 1.4rem; cursor: pointer;
    color: var(--color-primary);
    padding: 0.2rem;
}

/* ============================================================
   GRID DE ARTÍCULOS
   ============================================================ */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: 1.75rem;
    margin-top: 1.5rem;
}

/* Card */
.post-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
    position: relative;
}
.post-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
    border-color: transparent;
}
.post-card__img-link { display: block; overflow: hidden; aspect-ratio: 16/9; }
.post-card__img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.35s ease;
}
.post-card:hover .post-card__img { transform: scale(1.04); }
.post-card__body { padding: 1.1rem 1.35rem 1.35rem; }
.post-card__cat {
    display: inline-block;
    font-size: 0.72rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.06em;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    position: relative; z-index: 1;
}
.post-card__cat:hover { text-decoration: underline; }
.post-card__title {
    font-size: 1rem; font-weight: 700;
    margin: 0 0 0.6rem; line-height: 1.35;
}
.post-card__title a { color: var(--color-primary); text-decoration: none; }
.post-card__title a:hover { color: var(--color-accent); }
.post-card__title--sm { font-size: 0.88rem; }
.post-card__excerpt {
    font-size: 0.875rem; color: var(--color-muted);
    margin: 0 0 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-card__meta { font-size: 0.78rem; color: var(--color-muted); }
.post-card__date { font-size: 0.78rem; color: var(--color-muted); }

/* Stretched link */
.post-card__title a::after {
    content: '';
    position: absolute;
    inset: 0; z-index: 0;
}

/* ============================================================
   ARTÍCULO INDIVIDUAL
   ============================================================ */
.single-post {
    max-width: var(--max-width-article);
    margin: 0 auto;
    padding: 0 0 3rem;
}
.single-post__breadcrumb {
    font-size: 0.83rem; color: var(--color-muted);
    margin-bottom: 1.5rem;
    display: flex; align-items: center; gap: 0.5rem;
}
.single-post__breadcrumb a { color: var(--color-muted); }
.single-post__breadcrumb a:hover { color: var(--color-accent); }
.single-post__title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.2; margin-bottom: 1rem;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}
.single-post__meta {
    display: flex; align-items: center; gap: 0.75rem;
    font-size: 0.85rem; color: var(--color-muted);
    margin-bottom: 1.5rem; flex-wrap: wrap;
}
.single-post__featured-img {
    margin-bottom: 2rem;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 16/9;
}
.single-post__featured-img img { width: 100%; height: 100%; object-fit: cover; }
.single-post__intro {
    font-size: 1.1rem; color: var(--color-muted);
    line-height: 1.75; margin-bottom: 2rem;
    font-style: italic;
    border-left: 3px solid var(--color-accent);
    padding-left: 1.1rem;
}

/* Contenido artículo */
.post-content {
    font-family: var(--font-serif);
    font-size: 1.05rem; line-height: 1.9;
    color: var(--color-text);
}
.post-content h2 {
    font-family: var(--font-sans);
    font-size: 1.5rem; margin: 2.5rem 0 1rem;
    color: var(--color-primary);
    padding-bottom: 0.4rem;
    border-bottom: 2px solid var(--color-border);
    letter-spacing: -0.01em;
}
.post-content h3 {
    font-family: var(--font-sans);
    font-size: 1.2rem; margin: 1.8rem 0 0.75rem;
    color: var(--color-primary);
}
.post-content h4 { font-family: var(--font-sans); font-size: 1.05rem; margin: 1.5rem 0 0.5rem; }
.post-content p { margin: 0 0 1.5em; }
.post-content ul, .post-content ol { margin: 0 0 1.5em; padding-left: 1.6rem; }
.post-content li { margin-bottom: 0.5em; }
.post-content strong { color: var(--color-primary); font-weight: 700; }
.post-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 0.6rem 1.25rem;
    margin: 1.75rem 0;
    color: var(--color-muted);
    font-style: italic;
    background: var(--color-bg-alt);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.post-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius);
    overflow-x: auto;
    font-size: 0.88rem;
    margin: 1.75rem 0;
    line-height: 1.7;
}
.post-content code {
    font-family: 'Courier New', Courier, monospace;
    background: var(--color-bg-alt);
    padding: 0.15em 0.45em;
    border-radius: 4px;
    font-size: 0.88em;
    color: var(--color-accent);
}
.post-content pre code { background: none; padding: 0; color: inherit; }

/* FAQ */
.faq-section {
    margin: 2.5rem 0;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    padding: 1.5rem 2rem;
    border-left: 4px solid var(--color-accent);
}
.faq-section h2 { font-size: 1.25rem; margin-top: 0; }
.faq-item {
    margin-bottom: 1.5rem; padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}
.faq-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.faq-question { font-family: var(--font-sans); font-size: 1rem; font-weight: 700; color: var(--color-primary); margin: 0 0 0.5rem; }
.faq-answer { font-size: 0.95rem; }
.faq-answer p { margin-bottom: 0; }

/* Badges */
.post-badge {
    display: inline-block; font-size: 0.7rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.05em;
    padding: 0.2rem 0.6rem; border-radius: 20px;
    background: var(--color-bg-alt); color: var(--color-muted);
    border: 1px solid var(--color-border);
}

/* Tags */
.post-tags {
    margin-top: 2.5rem; padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
    display: flex; align-items: center; flex-wrap: wrap; gap: 0.5rem;
}
.post-tags strong { color: var(--color-muted); margin-right: 0.25rem; }
.tag-badge {
    display: inline-block; padding: 0.25rem 0.8rem;
    border-radius: 20px; border: 1px solid var(--color-border);
    font-size: 0.8rem; color: var(--color-muted);
    background: var(--color-bg-alt);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.tag-badge:hover {
    background: var(--color-accent); color: #fff;
    border-color: var(--color-accent); text-decoration: none;
}

/* Artículos relacionados */
.related-posts {
    max-width: var(--max-width-article);
    margin: 3rem auto 0; padding-top: 2rem;
    border-top: 2px solid var(--color-border);
}
.related-posts__title { font-size: 1.2rem; margin-bottom: 1.5rem; }
.related-posts__grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; }
.post-card--small .post-card__body { padding: 0.75rem; }

/* Ad slots */
.ad-slot { margin: 2rem auto; text-align: center; max-width: var(--max-width-article); }
.ad-slot--top { margin-top: 0; }

/* ============================================================
   CATEGORÍA HEADER
   ============================================================ */
.category-header {
    background: linear-gradient(135deg, var(--color-bg-alt), var(--color-bg));
    border-bottom: 1px solid var(--color-border);
    padding: 2.5rem 0 2rem;
    margin-bottom: 2rem;
}
.category-header__inner {
    max-width: var(--max-width-grid);
    margin: 0 auto; padding: 0 1.5rem;
}
.category-header__title { font-size: 2rem; margin: 0.5rem 0 0.75rem; letter-spacing: -0.02em; }
.category-header__desc { color: var(--color-muted); font-size: 1rem; margin: 0; max-width: 600px; }
.breadcrumb {
    font-size: 0.83rem; color: var(--color-muted);
    display: flex; gap: 0.5rem; align-items: center; margin: 0 0 0.5rem;
}
.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-accent); }

/* ============================================================
   BÚSQUEDA HEADER
   ============================================================ */
.search-header {
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: 2rem 0; margin-bottom: 2rem;
}
.search-header__inner { max-width: var(--max-width-grid); margin: 0 auto; padding: 0 1.5rem; }
.search-header__title { font-size: 1.5rem; margin: 0 0 0.5rem; }
.search-header__title em { font-style: normal; color: var(--color-accent); }
.search-header__count { font-size: 0.875rem; color: var(--color-muted); margin: 0 0 1.25rem; }
.search-form--large { display: flex; gap: 0.5rem; max-width: 560px; margin-top: 1rem; }
.search-form--large input {
    flex: 1; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
    padding: 0.65rem 1rem; font-size: 1rem; outline: none;
    background: var(--color-surface); color: var(--color-text);
}
.search-form--large input:focus { border-color: var(--color-accent); }
.btn-search {
    background: var(--color-accent); color: #fff; border: none;
    border-radius: var(--radius-sm); padding: 0.65rem 1.35rem;
    font-size: 0.95rem; cursor: pointer; white-space: nowrap;
    font-family: var(--font-sans); font-weight: 600;
}
.btn-search:hover { background: #ea6a0a; }

/* ============================================================
   PAGINACIÓN
   ============================================================ */
.pagination {
    display: flex; justify-content: center; align-items: center;
    gap: 0.35rem; margin: 3rem 0 1rem; flex-wrap: wrap;
}
.pagination__btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 40px; height: 40px; padding: 0 0.75rem;
    border: 1px solid var(--color-border); border-radius: var(--radius-sm);
    font-size: 0.875rem; color: var(--color-primary); font-family: var(--font-sans);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.pagination__btn:hover:not(.pagination__btn--active):not(.pagination__btn--disabled) {
    background: var(--color-bg-alt); border-color: var(--color-muted); text-decoration: none;
}
.pagination__btn--active {
    background: var(--color-accent); color: #fff;
    border-color: var(--color-accent); font-weight: 700;
}
.pagination__btn--disabled { color: var(--color-muted); cursor: not-allowed; opacity: 0.5; }
.pagination__ellipsis { color: var(--color-muted); padding: 0 0.25rem; }

/* ============================================================
   ESTADO VACÍO / 404
   ============================================================ */
.empty-state { text-align: center; padding: 4rem 1rem; color: var(--color-muted); }
.empty-state__icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state h2 { font-size: 1.4rem; margin-bottom: 0.5rem; color: var(--color-primary); }
.btn-link { color: var(--color-accent); font-size: 0.95rem; }

.error-page {
    display: flex; justify-content: center; align-items: center;
    min-height: 55vh; text-align: center; padding: 3rem 1rem;
}
.error-page__inner { max-width: 480px; }
.error-page__code {
    font-size: 8rem; font-weight: 900; line-height: 1;
    color: var(--color-border); margin-bottom: 1rem;
}
.error-page__title { font-size: 1.75rem; margin-bottom: 1rem; }
.error-page__message { color: var(--color-muted); margin-bottom: 2rem; }
.error-page__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn {
    display: inline-block; padding: 0.65rem 1.5rem;
    border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600;
    cursor: pointer; border: none; text-decoration: none;
    transition: background 0.2s, color 0.2s; font-family: var(--font-sans);
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: #ea6a0a; text-decoration: none; }
.btn--secondary {
    background: var(--color-bg-alt); color: var(--color-primary);
    border: 1px solid var(--color-border);
}
.btn--secondary:hover { background: var(--color-border); text-decoration: none; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
    background: var(--color-bg-dark);
    color: #94a3b8;
    margin-top: 5rem;
}
[data-theme="dark"] .site-footer { background: #020617; }

.footer-inner {
    max-width: var(--max-width-grid);
    margin: 0 auto;
    padding: 3.5rem 1.5rem 2.5rem;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2.5rem;
}
.footer-brand .site-logo { color: #f1f5f9; font-size: 1.1rem; margin-bottom: 0.75rem; display: block; }
.footer-desc { font-size: 0.875rem; color: #64748b; line-height: 1.65; max-width: 280px; }
.footer-social { display: flex; gap: 0.5rem; margin-top: 1.1rem; }
.footer-social a {
    width: 32px; height: 32px;
    border-radius: 8px;
    background: #1e293b; color: #94a3b8;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem;
    transition: background var(--transition), color var(--transition);
    text-decoration: none;
}
.footer-social a:hover { background: var(--color-accent); color: #fff; }
.footer-col h4 {
    font-size: 0.78rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.09em;
    color: #cbd5e1; margin: 0 0 0.85rem;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 0.45rem; }
.footer-col a { color: #64748b; font-size: 0.875rem; transition: color var(--transition); }
.footer-col a:hover { color: #f1f5f9; text-decoration: none; }
.footer-copy {
    border-top: 1px solid #1e293b;
    padding: 1.25rem 1.5rem;
    text-align: center;
    font-size: 0.8rem; color: #475569;
}
.footer-copy a { color: #64748b; }
.footer-copy a:hover { color: #f1f5f9; }

/* ============================================================
   ADMIN — estilos mínimos para tablas
   ============================================================ */
.admin-table th, .admin-table td { padding: 0.75rem 1rem; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .header-inner { gap: 0.75rem; }
    .site-nav { display: none; }
    .site-nav.open {
        display: flex; flex-direction: column;
        position: absolute; top: var(--header-height); left: 0; right: 0;
        background: var(--color-bg); border-bottom: 1px solid var(--color-border);
        padding: 1rem; z-index: 99;
        box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    }
    .menu-toggle { display: block; }
    .search-form input[type="search"] { width: 120px; }
    .posts-grid { grid-template-columns: 1fr; gap: 1.25rem; }
    .related-posts__grid { grid-template-columns: repeat(2,1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 1.75rem; }
    .single-post__title { font-size: 1.7rem; }
    .category-header__title { font-size: 1.6rem; }
}
@media (max-width: 480px) {
    .container { padding: 1.25rem 1rem; }
    .posts-grid { gap: 1rem; }
    .related-posts__grid { grid-template-columns: 1fr; }
    .pagination__btn { min-width: 36px; height: 36px; font-size: 0.82rem; }
    .search-form { display: none; }
    .single-post { padding: 0 0 2rem; }
    .post-content { font-size: 1rem; }
    .footer-inner { grid-template-columns: 1fr; }
    .header-actions { gap: 0.25rem; }
}