/* ==========================================================================
   ARTÍCULO MEJORAS - Progreso, TOC, Compartir, Breadcrumbs
   ========================================================================== */

/* --- Progress Bar --- */
.progreso-lectura {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-principal), #90e0ef);
    z-index: 9999;
    transition: width 0.1s linear;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
    max-width: 800px;
    margin: 1rem auto 0;
    padding: 0 2.5rem;
    font-size: 0.82rem;
    color: var(--color-muted);
}

.breadcrumbs a {
    color: var(--color-principal);
    text-decoration: none;
    font-weight: 600;
}

.breadcrumbs a:hover {
    text-decoration: underline;
}

.breadcrumbs__sep {
    margin: 0 6px;
    opacity: 0.5;
}

/* --- Reading Time + Meta --- */
.articulo__meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.6rem;
    flex-wrap: wrap;
}

.articulo__meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.82rem;
    color: var(--color-muted);
}

.articulo__meta-icon {
    font-size: 0.9rem;
}

/* --- Share Buttons --- */
.compartir {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 2rem 0;
    padding: 1.2rem 0;
    border-top: 1px solid var(--color-border);
}

.compartir__label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.compartir__btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
    color: #fff;
    transition: transform 0.2s, opacity 0.2s;
}

.compartir__btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.compartir__btn--whatsapp { background: #25D366; }
.compartir__btn--twitter { background: #1DA1F2; }
.compartir__btn--telegram { background: #0088cc; }

/* --- Table of Contents (TOC) --- */
.toc-wrapper {
    display: none;
}

.articulo__toc {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.2rem 1.4rem;
    margin-bottom: 2rem;
}

.articulo__toc-titulo {
    font-family: var(--fuente-titulo);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-oscuro);
    margin-bottom: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.articulo__toc-lista {
    list-style: none;
    padding: 0;
    margin: 0;
}

.articulo__toc-lista li {
    margin-bottom: 0.3rem;
}

.articulo__toc-lista a {
    display: block;
    color: var(--color-texto);
    text-decoration: none;
    font-size: 0.88rem;
    padding: 4px 0 4px 12px;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.articulo__toc-lista a:hover,
.articulo__toc-lista a.activo {
    color: var(--color-principal);
    border-left-color: var(--color-principal);
    background: var(--color-principal-alpha);
    border-radius: 0 6px 6px 0;
}

.articulo__toc-lista .toc-h3 {
    padding-left: 24px;
    font-size: 0.84rem;
}

/* --- TOC Flotante (desktop sidebar) --- */
@media (min-width: 1100px) {
    .toc-wrapper {
        display: block;
        position: fixed;
        top: 100px;
        left: calc(50% + 440px);
        width: 220px;
        z-index: 100;
    }

    .articulo__toc {
        background: transparent;
        border: none;
        padding: 0;
        box-shadow: none;
    }

    .articulo__toc-titulo {
        font-size: 0.75rem;
        color: var(--color-muted);
    }

    .articulo__toc-lista a {
        font-size: 0.78rem;
        padding: 3px 0 3px 10px;
    }
}

/* --- Newsletter CTA en artículos --- */
.articulo__newsletter {
    background: linear-gradient(135deg, #1d2d44 0%, #0d1b2a 100%);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    margin: 2.5rem 0;
    color: #fff;
}

.articulo__newsletter-titulo {
    font-family: var(--fuente-titulo);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.articulo__newsletter-texto {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 1rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .breadcrumbs {
        padding: 0 1rem;
        font-size: 0.78rem;
    }

    .compartir {
        flex-wrap: wrap;
    }

    .articulo__meta {
        gap: 0.6rem;
    }

    .articulo__toc {
        margin-bottom: 1.5rem;
        padding: 1rem;
    }

    .articulo__newsletter {
        padding: 1.5rem 1.2rem;
        border-radius: 12px;
    }
}