/* ================================================
   Table of Contents Sidebar Navigation
   Liuren Magic Sanctuary
   ================================================ */

/* === TOC Container === */
.toc-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background-color: var(--bg-white);
    border-right: 2px solid var(--border-color);
    box-shadow: 2px 0 8px var(--shadow);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 100;
    padding: var(--space-lg) var(--space-md);
    transition: transform 0.3s ease;
}

/* Scrollbar styling for TOC */
.toc-container::-webkit-scrollbar {
    width: 6px;
}

.toc-container::-webkit-scrollbar-track {
    background: var(--bg-cream);
}

.toc-container::-webkit-scrollbar-thumb {
    background: var(--accent-gold);
    border-radius: 3px;
}

.toc-container::-webkit-scrollbar-thumb:hover {
    background: var(--accent-bronze);
}

/* === TOC Header === */
.toc-header {
    font-family: var(--font-headings);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-red);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--accent-gold);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* === TOC Toggle Button (Mobile) === */
.toc-toggle {
    display: none; /* Hidden on desktop */
    position: fixed;
    top: 150px;
    left: 10px;
    z-index: 101;
    background-color: var(--primary-red);
    color: var(--bg-cream);
    border: 2px solid var(--accent-gold);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--shadow);
    transition: all 0.3s ease;
    align-items: center;
    justify-content: center;
}

.toc-toggle:hover {
    background-color: var(--accent-bronze);
    transform: scale(1.1);
}

.toc-toggle:focus {
    outline: 3px solid var(--accent-gold);
    outline-offset: 2px;
}

/* === TOC Navigation List === */
.toc-nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-nav li {
    margin-bottom: var(--space-xs);
}

.toc-nav a {
    display: block;
    padding: var(--space-xs) var(--space-sm);
    color: var(--text-medium);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    line-height: 1.4;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    white-space: normal;
}

.toc-nav a:hover {
    color: var(--primary-red);
    background-color: var(--bg-cream);
    border-left-color: var(--accent-gold);
    padding-left: calc(var(--space-sm) + 4px);
}

/* Active section highlighting */
.toc-nav a.active {
    color: var(--primary-red);
    font-weight: 600;
    background-color: var(--bg-cream);
    border-left-color: var(--primary-red);
}

/* === TOC Hierarchy Levels === */
.toc-nav .toc-level-1 {
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: var(--space-sm);
}

.toc-nav .toc-level-2 {
    padding-left: calc(var(--space-sm) + 10px);
    font-size: 0.88rem;
}

.toc-nav .toc-level-3 {
    padding-left: calc(var(--space-sm) + 20px);
    font-size: 0.85rem;
    color: var(--text-light);
}

/* === Content Adjustment === */
.content-with-toc {
    margin-left: 300px; /* Space for TOC sidebar */
    transition: margin-left 0.3s ease;
}

/* === Mobile & Tablet Responsive === */
@media (max-width: 1024px) {
    .toc-container {
        transform: translateX(-100%);
        width: 280px;
        top: 120px;
        height: calc(100vh - 140px);
    }

    .toc-container.visible {
        transform: translateX(0);
    }

    .toc-toggle {
        display: flex;
    }

    .content-with-toc {
        margin-left: 0;
    }

    /* Overlay when TOC is open on mobile */
    .toc-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 99;
        display: none;
    }

    .toc-overlay.visible {
        display: block;
    }
}

@media (max-width: 768px) {
    .toc-container {
        width: 85%;
        max-width: 300px;
    }

    .toc-toggle {
        top: 130px;
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .toc-container {
        width: 90%;
        padding: var(--space-md) var(--space-sm);
    }

    .toc-header {
        font-size: 1rem;
    }

    .toc-nav a {
        font-size: 0.85rem;
    }

    .toc-nav .toc-level-1 {
        font-size: 0.9rem;
    }

    .toc-nav .toc-level-2 {
        font-size: 0.82rem;
    }

    .toc-nav .toc-level-3 {
        font-size: 0.8rem;
    }
}

/* === Smooth Scrolling Enhancement === */
html.toc-scroll {
    scroll-behavior: smooth;
}

/* === Print Styles === */
@media print {
    .toc-container,
    .toc-toggle,
    .toc-overlay {
        display: none;
    }

    .content-with-toc {
        margin-left: 0;
    }
}

/* === Accessibility === */
@media (prefers-reduced-motion: reduce) {
    .toc-container,
    .content-with-toc,
    .toc-toggle {
        transition: none;
    }

    html.toc-scroll {
        scroll-behavior: auto;
    }
}

/* === Loading State === */
.toc-container.loading {
    opacity: 0.6;
}

.toc-container.loading::after {
    content: "Loading...";
    display: block;
    text-align: center;
    color: var(--text-light);
    font-style: italic;
    padding: var(--space-md);
}

/* === Empty State === */
.toc-nav:empty::before {
    content: "No sections found";
    display: block;
    text-align: center;
    color: var(--text-light);
    font-style: italic;
    padding: var(--space-md);
}

/* === Close Button (Mobile) === */
.toc-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-medium);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color 0.2s ease;
}

.toc-close:hover {
    color: var(--primary-red);
}

@media (max-width: 1024px) {
    .toc-close {
        display: block;
    }
}