/* Layout Principal */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--color-surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

footer {
    background-color: var(--color-text);
    color: var(--color-background);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
}

aside {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    min-width: 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

/* Contenedores de Anuncios (AdSense) */
.ad-container {
    background-color: #f1f5f9; /* Diferenciación visual sutil */
    margin: var(--spacing-xl) auto;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
    visibility: visible !important;
    opacity: 1 !important;
}

.ad-container::before {
    content: 'Anuncio';
    position: absolute;
    top: 0;
    left: 0;
    background-color: #e2e8f0;
    color: #64748b;
    font-size: 0.7rem;
    padding: 2px 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 1;
}

/* Bloque 1: Sidebar/Top */
.ad-container--top {
    width: 100%;
    max-width: 336px;
    min-height: 280px;
    height: 280px;
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius-md);
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
}

/* Bloque 2: Contenido Central */
.ad-container--content {
    width: 100%;
    max-width: 728px;
    min-height: 90px;
    height: 90px;
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius-md);
}

/* Bloque 3: Footer */
.ad-container--footer {
    width: 100%;
    max-width: 728px;
    min-height: 90px;
    height: 90px;
    margin-bottom: var(--spacing-xl);
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius-md);
}

/* Layout de Página con Sidebar (si aplica) */
.page-layout {
    display: grid;
    gap: var(--spacing-xl);
}

@media (min-width: 769px) {
    .page-layout {
        grid-template-columns: 1fr 300px; /* Contenido + Sidebar */
    }
    
    .ad-container--top {
        /* position: sticky; */
        /* top: 80px; */
    }
}