:root {
  /* NUEVA VARIABLE DE ESCALA: Juega con este valor para ajustar el tamaño general */
  --scale-factor: 0.9; 

  --color-blue: #0090E0;
  --color-orange: #F0A000;
  --color-magenta: #E00070;
  --color-yellow: #F0C000;
  --color-text: #111827;
  --color-text-muted: #6B7280;
  --color-background: #FFFFFF;
  --color-background-alt: #F7F8F9;
  --color-border: #E5E7EB;
  --color-success: #1B8F4B;
  
  --font-family-base: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --font-family-headings: 'Plus Jakarta Sans', sans-serif;
  --font-weight-normal: 400;
  --font-weight-bold: 700;
  --font-weight-black: 800;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 8px -2px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.04);
  --shadow-lg: 0 12px 20px -4px rgb(0 0 0 / 0.08), 0 4px 8px -4px rgb(0 0 0 / 0.05);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 10px 10px -5px rgb(0 0 0 / 0.04);
  --shadow-interactive: 0 0 0 4px rgba(0, 144, 224, 0.2);
  
  --radius-md: calc(12px * var(--scale-factor));
  --radius-lg: calc(16px * var(--scale-factor));
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}

.article-cta{margin-top:2rem;padding:1.25rem;border:1px dashed var(--color-border);border-radius:var(--radius-md);background:rgba(90,162,255,.06)}
.article-tip{background:rgba(255,211,110,.08);border:1px solid rgba(255,211,110,.3);padding:1rem;border-radius:var(--radius-md);margin:1rem 0}
.btn{display:inline-block;padding:.75rem 1rem;border-radius:999px;border:1px solid var(--color-blue);color:white;background:var(--color-blue);font-weight:700;text-decoration:none}
.btn:hover{filter:brightness(1.1);transform:translateY(-1px);transition:transform .2s ease}
.btn-close-article{position:absolute;right:12px;top:10px;background:transparent;border:none;font-size:2rem;line-height:1;cursor:pointer;color:var(--color-text-muted)}
.blog-card-summary:focus,.filter-btn:focus,.btn:focus{outline:2px solid var(--color-yellow);outline-offset:2px;border-radius:8px}

.blog-category{display:inline-block;padding:.25rem .6rem;border-radius:999px;background:var(--color-blue);color:#fff;font-size:.8rem;font-weight:700;margin-bottom:.5rem}

.time-to-read{opacity:.85}

.newsletter-form .success{margin-top:.75rem;font-size:.9rem;opacity:.9}

/* ===================================================================
   HOJA DE ESTILOS DEL BLOG - GRÁFICA O&S
   =================================================================== */

/* --- Cabecera y Filtros --- */
.blog-hero {
    padding: 4rem 0;
    background-color: var(--color-background-alt);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}
.blog-hero h1 { color: var(--color-blue); }

.blog-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 3rem;
}
.filter-btn {
    background-color: var(--color-background);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: 99px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}
.filter-btn:hover {
    background-color: var(--color-background-alt);
    border-color: var(--color-blue);
    color: var(--color-blue);
}
.filter-btn.active {
    background-color: var(--color-blue);
    color: white;
    border-color: var(--color-blue);
}

/* --- Layout del Blog --- */
.blog-layout {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}
.blog-grid-interactive {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.75rem;
}

/* --- Tarjeta de Artículo (Base) --- */
.blog-card-expandable {
    background: var(--color-background);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: all 0.4s ease;
    overflow: hidden;
}
.blog-card-expandable.hidden { display: none; }
.blog-card-expandable.is-open { box-shadow: var(--shadow-xl); border-color: var(--color-blue); }

/* --- Resumen del Artículo --- */
.blog-card-summary { cursor: pointer; }
.blog-card-summary img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.blog-card-expandable:hover .blog-card-summary img { transform: scale(1.05); }
.blog-card-summary .blog-content { padding: 1.5rem; }
.article-meta-summary { display: flex; justify-content: space-between; align-items: center; margin-top: 1rem; }
.read-more { font-weight: 700; color: var(--color-blue); }
.arrow { display: inline-block; transition: transform 0.3s ease; }
.blog-card-expandable.is-open .blog-card-summary .arrow { transform: rotate(90deg); }
.time-to-read { font-size: 0.9rem; color: var(--color-text-muted); font-weight: 500; }

/* --- Artículo Destacado --- */
.featured-article .blog-card-summary {
    display: grid;
    grid-template-columns: 1fr;
}
.featured-article .blog-card-summary img { height: 350px; }

/* --- Contenido Completo del Artículo --- */
.article-full-content {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.8s ease, opacity 0.6s ease, padding 0.6s ease;
}
.blog-card-expandable.is-open .article-full-content {
    max-height: 5000px; /* Valor alto para permitir contenido extenso */
    opacity: 1;
}
.article-body {
    padding: 0 1.5rem 2rem;
    font-size: 1.1rem;
    line-height: 1.8;
    position: relative;
}
.article-body h2 { margin: 2rem 0 1rem; font-size: 1.8rem; }
.article-body p, .article-body ul, .article-body ol { margin-bottom: 1.5rem; }
.article-body ul, .article-body ol { padding-left: 20px; }
.article-body .lead { font-size: 1.2rem; font-style: italic; color: var(--color-text); }

/* --- Barra de Progreso --- */
#reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--color-magenta), var(--color-blue));
    width: 0%;
    z-index: 200;
    transition: width 0.1s linear;
}

/* --- Botones de Compartir --- */
.article-share { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }
.article-share h4 { font-size: 1rem; margin-bottom: 1rem; text-align: center; }
.share-buttons { display: flex; justify-content: center; gap: 1rem; }
.share-btn { display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px; border-radius: 99px; text-decoration: none; font-weight: 600; transition: all var(--transition-base); }
.share-btn svg { width: 20px; height: 20px; }
.share-btn.whatsapp { background-color: #25D366; color: white; }
.share-btn.linkedin { background-color: #0A66C2; color: white; }
.share-btn.twitter { background-color: #1DA1F2; color: white; }
.share-btn:hover { transform: translateY(-3px); filter: brightness(1.1); }

/* --- CTA de Suscripción --- */
.newsletter-cta {
    margin-top: 4rem;
    padding: 3rem;
    background: linear-gradient(135deg, var(--color-blue), var(--color-magenta));
    color: white;
    border-radius: var(--radius-lg);
    text-align: center;
}
.newsletter-cta h3 { color: white; font-size: 2rem; }
.newsletter-cta p { opacity: 0.9; margin: 1rem 0 2rem; }
.newsletter-form { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.newsletter-form input { padding: 0.8rem 1rem; border-radius: var(--radius-md); border: none; min-width: 250px; }
.newsletter-form .btn { background-color: var(--color-yellow); color: var(--color-text); border: none; }

/* --- Media Queries --- */
@media (min-width: 768px) {
    .blog-grid-interactive { grid-template-columns: repeat(2, 1fr); }
    .featured-article .blog-card-summary { grid-template-columns: 1fr 1fr; }
    .featured-article .blog-card-summary img { height: 100%; }
}