/* ==========================================================================
   Blog de CogniTrack
   --------------------------------------------------------------------------
   Se carga siempre junto a `landing-styles.css`, que es quien aporta las
   variables de color, la barra de navegación, el pie y los botones. Aquí solo
   está lo propio del blog, para no duplicar nada de la landing: si cambia la
   identidad visual del sitio, el blog la sigue sin tocar este fichero.

   Dos decisiones que condicionan el resto:
   - El artículo se lee en una columna de 760 px. Una línea de más de unos 80
     caracteres obliga al ojo a volver a buscar el principio del renglón, y
     estos artículos son largos.
   - Montserrat (ya autoalojada para el resto del sitio) solo en los titulares.
     El cuerpo usa la pila del sistema: no añade ninguna descarga y en tamaños
     de lectura larga se ve mejor que una tipografía geométrica.
   ========================================================================== */

:root {
    --blog-measure: 760px;
    --blog-text: #2b3033;
    --blog-text-soft: #5a6368;
    --blog-rule: #e6e9ea;
    --blog-mint-soft: #eef8f5;
}

.blog-main {
    /* La barra de navegación es sticky; este margen evita que el primer
       elemento quede pegado a ella. */
    padding-top: 40px;
    padding-bottom: 80px;
    background: var(--bg-white);
}

.blog-main h1,
.blog-main h2,
.blog-main h3,
.blog-main h4 {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--blog-text);
    line-height: 1.25;
    letter-spacing: -0.015em;
}

/* --------------------------------------------------------------------------
   Migas de pan
   -------------------------------------------------------------------------- */

.blog-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--blog-text-soft);
    margin-bottom: 20px;
}

.blog-breadcrumb a {
    color: var(--blog-text-soft);
    text-decoration: none;
}

.blog-breadcrumb a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.blog-breadcrumb__sep {
    color: #b9c0c3;
}

.blog-breadcrumb [aria-current="page"] {
    color: var(--blog-text);
    font-weight: 600;
    /* El último elemento es el título del artículo y puede ser largo: en móvil
       se recorta en lugar de empujar la línea. */
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Cabecera del listado
   -------------------------------------------------------------------------- */

.blog-hero {
    padding: 20px 0 48px;
}

.blog-hero h1 {
    font-size: clamp(32px, 5vw, 46px);
    font-weight: 700;
    margin-bottom: 16px;
}

.blog-hero__subtitle {
    max-width: 680px;
    font-size: 18px;
    line-height: 1.6;
    color: var(--blog-text-soft);
}

/* --------------------------------------------------------------------------
   Categorías
   -------------------------------------------------------------------------- */

.blog-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--blog-rule);
}

.blog-categories a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid var(--blog-rule);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--blog-text-soft);
    text-decoration: none;
    transition: all 0.18s ease;
}

.blog-categories a:hover {
    border-color: var(--primary-color);
    color: var(--primary-dark);
    background: var(--blog-mint-soft);
}

.blog-categories a.is-active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.blog-categories a span {
    font-size: 12px;
    opacity: 0.7;
}

/* --------------------------------------------------------------------------
   Rejilla de tarjetas
   -------------------------------------------------------------------------- */

.blog-grid {
    display: grid;
    /* `auto-fill` con mínimo de 320 px: la rejilla pasa de 3 a 2 a 1 columna
       sin necesidad de media queries para cada salto. */
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 36px 32px;
}

.blog-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-white);
    border: 1px solid var(--blog-rule);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.blog-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.blog-card__media {
    display: block;
    aspect-ratio: 1536 / 800;
    background: var(--blog-mint-soft);
    overflow: hidden;
}

.blog-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Un artículo sin portada no debe romper la rejilla: ocupa el mismo hueco con
   un degradado de la marca. */
.blog-card__placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
}

.blog-card__body {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 22px 24px 26px;
    flex: 1;
}

.blog-card__category {
    align-self: flex-start;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--primary-dark);
    text-decoration: none;
}

.blog-card__category:hover {
    text-decoration: underline;
}

.blog-card__title {
    font-size: 20px;
    font-weight: 700;
    margin: 0;
}

.blog-card__title a {
    color: var(--blog-text);
    text-decoration: none;
}

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

.blog-card__excerpt {
    font-size: 15px;
    line-height: 1.6;
    color: var(--blog-text-soft);
    margin: 0;
    flex: 1;
}

.blog-card__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-light);
    margin: 0;
}

/* --------------------------------------------------------------------------
   Paginación y listado vacío
   -------------------------------------------------------------------------- */

.blog-pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 56px;
    padding-top: 28px;
    border-top: 1px solid var(--blog-rule);
}

.blog-pagination a {
    font-weight: 600;
    color: var(--primary-dark);
    text-decoration: none;
}

.blog-pagination a:hover {
    text-decoration: underline;
}

.blog-pagination__status {
    font-size: 14px;
    color: var(--text-light);
}

.blog-empty {
    padding: 48px 0 32px;
    font-size: 17px;
    color: var(--blog-text-soft);
}

.blog-notfound {
    padding: 80px 0 120px;
    text-align: center;
}

.blog-notfound h1 {
    font-size: clamp(28px, 4vw, 38px);
    margin-bottom: 16px;
}

.blog-notfound p {
    color: var(--blog-text-soft);
    margin-bottom: 24px;
}

/* --------------------------------------------------------------------------
   Artículo
   -------------------------------------------------------------------------- */

.blog-article__head,
.blog-article__layout,
.blog-article__cover {
    max-width: var(--blog-measure);
    margin: 0 auto;
    padding: 0 24px;
}

.blog-article__head {
    padding-top: 8px;
    padding-bottom: 28px;
}

.blog-article__category {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--primary-dark);
    text-decoration: none;
    margin-bottom: 14px;
}

.blog-article__head h1 {
    font-size: clamp(30px, 4.6vw, 44px);
    font-weight: 700;
    margin-bottom: 18px;
}

/* Entradilla: resume el artículo y es lo primero que se lee después del
   titular, así que va a mayor tamaño que el cuerpo. */
.blog-article__standfirst {
    font-size: 20px;
    line-height: 1.55;
    color: var(--blog-text-soft);
    margin-bottom: 20px;
}

.blog-article__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-light);
}

.blog-article__cover {
    margin-bottom: 40px;
}

.blog-article__cover img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    display: block;
}

/* --------------------------------------------------------------------------
   Ideas clave e índice
   -------------------------------------------------------------------------- */

.blog-takeaways {
    background: var(--blog-mint-soft);
    border-left: 4px solid var(--primary-color);
    border-radius: 0 12px 12px 0;
    padding: 24px 28px;
    margin-bottom: 36px;
}

.blog-takeaways__title {
    font-size: 13px !important;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary-dark);
    margin-bottom: 14px;
}

.blog-takeaways ul {
    margin: 0;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.blog-takeaways li {
    font-size: 16px;
    line-height: 1.6;
    color: var(--blog-text);
}

.blog-toc {
    border: 1px solid var(--blog-rule);
    border-radius: 12px;
    padding: 22px 26px;
    margin-bottom: 40px;
}

.blog-toc__title {
    font-size: 13px !important;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--blog-text-soft);
    margin-bottom: 12px;
}

.blog-toc ol {
    margin: 0;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.blog-toc a {
    font-size: 15px;
    color: var(--blog-text);
    text-decoration: none;
}

.blog-toc a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Cuerpo del artículo
   -------------------------------------------------------------------------- */

.blog-prose {
    font-size: 18px;
    line-height: 1.75;
    color: var(--blog-text);
}

.blog-prose > * + * {
    margin-top: 24px;
}

.blog-prose h2 {
    font-size: 28px;
    font-weight: 700;
    margin-top: 48px !important;
    /* Compensa la barra de navegación sticky al llegar desde el índice: sin
       esto el encabezado queda tapado. */
    scroll-margin-top: 92px;
}

.blog-prose h3 {
    font-size: 21px;
    font-weight: 600;
    margin-top: 36px !important;
    scroll-margin-top: 92px;
}

.blog-prose h4 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 28px !important;
}

.blog-prose a {
    color: var(--primary-dark);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.blog-prose a:hover {
    background: var(--blog-mint-soft);
}

.blog-prose strong {
    font-weight: 600;
    color: #1e2326;
}

.blog-prose ul,
.blog-prose ol {
    padding-left: 26px;
}

.blog-prose li + li {
    margin-top: 10px;
}

.blog-prose blockquote {
    margin-left: 0;
    margin-right: 0;
    padding: 4px 0 4px 24px;
    border-left: 3px solid var(--primary-color);
    font-size: 20px;
    line-height: 1.6;
    color: var(--blog-text-soft);
    font-style: italic;
}

.blog-prose img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}

.blog-prose figure {
    margin: 0;
}

.blog-prose figcaption {
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-light);
    text-align: center;
}

.blog-prose pre {
    background: var(--bg-gray-100);
    border-radius: 10px;
    padding: 18px 20px;
    overflow-x: auto;
    font-size: 14px;
}

.blog-prose code {
    font-family: 'SFMono-Regular', Menlo, Consolas, monospace;
    font-size: 0.92em;
    background: var(--bg-gray-100);
    padding: 2px 6px;
    border-radius: 4px;
}

.blog-prose pre code {
    background: none;
    padding: 0;
}

/* Una tabla no cabe en 760 px en móvil: se desplaza dentro de su propio
   contenedor en lugar de ensanchar la página. */
.blog-prose table {
    display: block;
    overflow-x: auto;
    width: 100%;
    border-collapse: collapse;
    font-size: 16px;
}

.blog-prose th,
.blog-prose td {
    border: 1px solid var(--blog-rule);
    padding: 10px 14px;
    text-align: left;
}

.blog-prose th {
    background: var(--bg-gray-50);
    font-weight: 600;
}

.blog-prose hr {
    border: none;
    border-top: 1px solid var(--blog-rule);
    margin: 40px 0 !important;
}

/* --------------------------------------------------------------------------
   Preguntas frecuentes, autoría y llamada a la acción
   -------------------------------------------------------------------------- */

.blog-faq {
    margin-top: 56px;
    padding-top: 36px;
    border-top: 1px solid var(--blog-rule);
}

.blog-faq h2 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 28px;
}

.blog-faq__item + .blog-faq__item {
    margin-top: 26px;
}

.blog-faq__item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.blog-faq__item p {
    font-size: 17px;
    line-height: 1.7;
    color: var(--blog-text-soft);
    margin: 0;
}

.blog-author {
    display: flex;
    gap: 18px;
    align-items: flex-start;
    margin-top: 48px;
    padding: 24px 26px;
    background: var(--bg-gray-50);
    border-radius: 14px;
}

.blog-author img {
    flex-shrink: 0;
}

.blog-author__name {
    font-weight: 700;
    color: var(--blog-text);
    margin: 0 0 6px;
}

.blog-author__bio {
    font-size: 14px;
    line-height: 1.65;
    color: var(--blog-text-soft);
    margin: 0;
}

.blog-cta {
    margin-top: 40px;
    padding: 36px 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 16px;
    color: #fff;
    text-align: center;
}

.blog-cta h2 {
    color: #fff !important;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.blog-cta p {
    font-size: 16px;
    line-height: 1.65;
    margin-bottom: 24px;
    opacity: 0.95;
}

.blog-cta .btn-primary-large {
    background: #fff;
    color: var(--primary-dark);
}

.blog-cta .btn-primary-large:hover {
    background: var(--bg-gray-50);
}

/* --------------------------------------------------------------------------
   Artículos relacionados
   -------------------------------------------------------------------------- */

.blog-related {
    margin-top: 80px;
    padding-top: 56px;
    border-top: 1px solid var(--blog-rule);
}

.blog-related h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 32px;
}

/* --------------------------------------------------------------------------
   Aviso de previsualización (solo panel de administración)
   -------------------------------------------------------------------------- */

.blog-preview-notice {
    position: sticky;
    top: 0;
    z-index: 200;
    background: var(--warning-color);
    color: #4a3800;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    padding: 10px 16px;
}

/* --------------------------------------------------------------------------
   Adaptación a pantallas pequeñas
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
    .blog-main {
        padding-top: 24px;
        padding-bottom: 56px;
    }

    .blog-hero {
        padding-bottom: 32px;
    }

    .blog-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .blog-prose {
        font-size: 17px;
    }

    .blog-prose h2 {
        font-size: 24px;
        margin-top: 40px !important;
    }

    .blog-prose h3 {
        font-size: 19px;
    }

    .blog-article__standfirst {
        font-size: 18px;
    }

    .blog-article__cover img {
        border-radius: 12px;
    }

    .blog-pagination {
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
    }

    .blog-author {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .blog-article__head,
    .blog-article__layout,
    .blog-article__cover {
        padding: 0 18px;
    }

    .blog-takeaways,
    .blog-toc {
        padding: 18px 20px;
    }

    .blog-cta {
        padding: 28px 22px;
    }

    .blog-breadcrumb {
        font-size: 13px;
    }

    /* En móvil el título completo en las migas de pan ocupa demasiado y ya
       está como <h1> justo debajo. */
    .blog-breadcrumb [aria-current="page"] {
        display: none;
    }

    .blog-breadcrumb__sep:last-of-type {
        display: none;
    }
}