/* =============================================================
   12. BACK TO TOP BUTTON
   ============================================================= */

.pg-wiki-back-to-top {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 997;
    background: var(--pg-white);
    color: var(--pg-grey);
    border: 1px solid var(--pg-border-light);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(12px);
    transition: all 0.25s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    pointer-events: none;
}

.pg-wiki-back-to-top.pg-wiki-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.pg-wiki-back-to-top:hover {
    color: var(--pg-galaxy);
    border-color: var(--pg-galaxy);
    box-shadow: 0 4px 12px var(--pg-galaxy-light);
}

/* =============================================================
   13. RESPONSIVE - 1200px
   ============================================================= */

@media (max-width: 1200px) {
    .pg-wiki-sidebar-right {
        display: none;
    }

    .pg-wiki-layout {
        max-width: 960px;
    }
}

/* =============================================================
   14. RESPONSIVE - 1024px (Tablet)
   ============================================================= */

@media (max-width: 1024px) {
    .pg-wiki-sidebar-left {
        width: 210px;
    }

    .pg-wiki-content {
        padding: 36px;
    }

    .pg-wiki-title {
        font-size: 28px;
    }
}

/* =============================================================
   15. RESPONSIVE - 768px (Mobile)
   ============================================================= */

@media (max-width: 768px) {
    .pg-wiki-sidebar-left {
        display: none;
    }

    .pg-wiki-mobile-toc-toggle {
        display: flex;
    }

    .pg-wiki-layout {
        padding: 0 16px 60px;
    }

    .pg-wiki-breadcrumb {
        padding: 12px 16px;
    }

    .pg-wiki-content {
        padding: 28px 20px;
    }

    .pg-wiki-title {
        font-size: 24px;
    }

    .pg-wiki-body {
        font-size: 15px;
        line-height: 1.75;
    }

    .pg-wiki-body h2 {
        font-size: 20px;
        margin-top: 36px;
    }

    .pg-wiki-body h3 {
        font-size: 17px;
        margin-top: 28px;
    }

    .pg-wiki-body h2 .pg-wiki-heading-anchor,
    .pg-wiki-body h3 .pg-wiki-heading-anchor {
        display: none;
    }

    .pg-wiki-nav {
        flex-direction: column;
    }

    .pg-wiki-nav-prev,
    .pg-wiki-nav-next {
        max-width: 100%;
    }

    .pg-wiki-nav-next {
        text-align: left;
        align-items: flex-start;
    }

    .pg-wiki-related-grid {
        grid-template-columns: 1fr;
    }

    .pg-wiki-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .pg-wiki-meta-sep {
        display: none;
    }

    .pg-wiki-back-to-top {
        left: auto;
        right: 24px;
        bottom: 80px;
    }
}

/* =============================================================
   16. RESPONSIVE - 480px (Small mobile)
   ============================================================= */

@media (max-width: 480px) {
    .pg-wiki-content {
        padding: 20px 16px;
    }

    .pg-wiki-title {
        font-size: 22px;
    }

    .pg-wiki-body pre {
        padding: 16px;
        font-size: 13px;
        border-radius: 2px;
    }

    .pg-wiki-mobile-toc-toggle {
        bottom: 16px;
        right: 16px;
    }
}