/**
 * CM Storytelling Toolkit - TOC Generator Styles
 * Version: 3.0.0
 * 
 * Styles for Table of Contents with separator and heading support
 * Includes Frank's "Stern-zu-Stern" anchor styling
 */

/* ==========================================================================
   TOC CONTAINER
   ========================================================================== */

.cm-toc {
    background: var(--cm-background-dark, #f8f9fa);
    border: 1px solid var(--cm-border, #ddd);
    border-radius: var(--cm-border-radius, 6px);
    padding: var(--cm-spacing-lg, 1.5rem);
    margin: var(--cm-spacing-lg, 2rem) 0;
    font-family: var(--cm-font-family-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.cm-toc--separator {
    border-left: 4px solid #6c757d;
    background: linear-gradient(135deg, #f8f9fa 0%, #f1f3f4 100%);
}

.cm-toc--headings {
    border-left: 4px solid var(--cm-primary, #007cba);
    background: linear-gradient(135deg, #f8f9fa 0%, #f0f7ff 100%);
}

/* ==========================================================================
   TOC TITLE
   ========================================================================== */

.cm-toc__title {
    margin: 0 0 var(--cm-spacing-md, 1rem) 0;
    font-size: 1.2em;
    font-weight: var(--cm-font-weight-bold, 700);
    color: var(--cm-text, #333);
    border-bottom: 2px solid var(--cm-primary, #007cba);
    padding-bottom: var(--cm-spacing-xs, 0.5rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}

.cm-toc__toggle {
    display: none;
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    transition: transform 0.3s ease;
}

.cm-toc__toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--cm-text, #333);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 1px;
}

.cm-toc__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(3px, 3px);
}

.cm-toc__toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.cm-toc__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

.cm-toc--separator .cm-toc__title {
    border-bottom-color: #6c757d;
    color: #495057;
}

.cm-toc--separator .cm-toc__title::before {
    content: '📖 ';
    margin-right: var(--cm-spacing-xs, 0.5rem);
}

.cm-toc--headings .cm-toc__title::before {
    content: '📋 ';
    margin-right: var(--cm-spacing-xs, 0.5rem);
}

/* ==========================================================================
   TOC LIST
   ========================================================================== */

.cm-toc__list {
    list-style: none;
    margin: 0;
    padding: 0 !important;
}

.cm-toc__item {
    margin: 0;
    position: relative;
    list-style-type: none;
    margin-bottom: 5px;
}

.cm-toc__item--separator {
    font-style: italic;
    font-size: 14px;
    line-height: 1.2em;
}

.cm-toc__item--separator::before {
    content: '';
    opacity: 0.7;
}

/* Heading level styling */
.cm-toc__item--level-2 {
    margin-left: 0;
}

.cm-toc__item--level-3 {
    margin-left: var(--cm-spacing-md, 1rem);
    font-size: 0.95em;
}

.cm-toc__item--level-4 {
    margin-left: var(--cm-spacing-lg, 2rem);
    font-size: 0.9em;
}

.cm-toc__item--level-5 {
    margin-left: calc(var(--cm-spacing-lg, 2rem) * 1.5);
    font-size: 0.85em;
}

.cm-toc__item--level-6 {
    margin-left: calc(var(--cm-spacing-lg, 2rem) * 2);
    font-size: 0.8em;
}

/* ==========================================================================
   TOC LINKS
   ========================================================================== */

.cm-toc__link {
    color: var(--cm-text-light, #666);
    text-decoration: none;
    display: block;
    padding: 5px;
    border-left: 3px solid transparent;
    border-radius: 3px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.2em;
}

.cm-toc__link:hover {
    color: var(--cm-primary, #007cba);
    border-left-color: var(--cm-primary, #007cba);
    background: rgba(0, 124, 186, 0.05);
    transform: translateX(3px);
    text-decoration: none;
}

.cm-toc__link:focus {
    outline: 2px solid var(--cm-primary, #007cba);
    outline-offset: 2px;
}

/* Separator TOC styling */
.cm-toc--separator .cm-toc__link {
    color: #6c757d;
    background: rgba(108, 117, 125, 0.02);
}

.cm-toc--separator .cm-toc__link:hover {
    color: #495057;
    border-left-color: #6c757d;
    background: rgba(108, 117, 125, 0.08);
}

/* Active state */
.cm-toc__link.cm-toc-active {
    color: var(--cm-primary, #007cba);
    border-left-color: var(--cm-primary, #007cba);
    background: rgba(0, 124, 186, 0.1);
    font-weight: var(--cm-font-weight-bold, 600);
}

.cm-toc--separator .cm-toc__link.cm-toc-active {
    color: #343a40;
    border-left-color: #6c757d;
    background: rgba(108, 117, 125, 0.15);
}

/* ==========================================================================
   TOC ANCHORS (Frank's Stern-zu-Stern System + Auto-Chapters)
   ========================================================================== */

/* Only center paragraphs with star separators, NOT auto-chapters */
p:has(.cm-toc-anchor:not(.cm-auto-chapter-anchor)) {
    text-align: center;
}

.cm-toc-anchor {
    display: inline-block;
    position: relative;
    scroll-margin-top: 80px;
    font-weight: var(--cm-font-weight-bold, bold);
    border-radius: 0;
    background: none;
    transition: all 0.3s ease;
    margin-top: 15px;
}

/* Auto-chapter anchors are invisible positioning anchors */
.cm-auto-chapter-anchor {
    display: block !important;
    position: absolute !important;
    top: -80px !important;
    left: 0 !important;
    width: 1px !important;
    height: 1px !important;
    visibility: hidden !important;
    pointer-events: none !important;
    scroll-margin-top: 80px;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    background: none !important;
    text-decoration: none !important;
}

.cm-toc-anchor:target {
    background: rgba(108, 117, 125, 0.25);
    animation: cm-toc-highlight 2s ease-out;
}

@keyframes cm-toc-highlight {
    0% { 
        background: rgba(108, 117, 125, 0.4);
        transform: scale(1.1);
    }
    100% { 
        background: rgba(108, 117, 125, 0.25);
        transform: scale(1);
    }
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

/* Mobile TOC with Hamburger Menu */
@media (max-width: 980px) {
    .cm-toc {
        margin: var(--cm-spacing-md, 1rem) 0;
        padding: var(--cm-spacing-md, 1rem);
    }
    
    .cm-toc__title {
        font-size: 1.1em;
        margin-bottom: var(--cm-spacing-xs, 0.5rem);
    }
    
    .cm-toc__toggle {
        display: block;
    }
    
    .cm-toc__list {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        margin-top: var(--cm-spacing-sm, 0.75rem);
    }
    
    .cm-toc.cm-toc--expanded .cm-toc__list {
        max-height: 500px;
        transition: max-height 0.5s ease-in;
    }
    
    .cm-toc__link {
        padding: var(--cm-spacing-xs, 0.5rem);
        font-size: 0.95em;
    }
    
    .cm-toc__item--level-3,
    .cm-toc__item--level-4,
    .cm-toc__item--level-5,
    .cm-toc__item--level-6 {
        margin-left: var(--cm-spacing-sm, 0.5rem);
        font-size: 0.9em;
    }
    
    .cm-toc-anchor {
        padding: 1px 4px;
        margin: 0 2px;
    }
    
    /* Separator toggle button styling */
    .cm-toc--separator .cm-toc__toggle span {
        background: #6c757d;
    }
    
    .cm-toc--headings .cm-toc__toggle span {
        background: var(--cm-primary, #007cba);
    }
}

/* Tablet */
@media (min-width: 769px) and (max-width: 1024px) {
    .cm-toc {
        margin: var(--cm-spacing-xl, 2rem) 0;
    }
}

/* Desktop */
@media (min-width: 1025px) {
    .cm-toc__link:hover {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }
    
    .cm-toc-anchor:hover {
        background: rgba(142, 68, 173, 0.2);
        transform: scale(1.05);
    }
}

/* ==========================================================================
   DARK MODE SUPPORT
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    .cm-toc {
        --cm-background-dark: #2a2a2a;
        --cm-border: rgba(255, 255, 255, 0.1);
        --cm-text: #e0e0e0;
        --cm-text-light: #b0b0b0;
        color: var(--cm-text);
    }
    
    .cm-toc--separator {
        background: linear-gradient(135deg, #2a2a2a 0%, #343a40 100%);
    }
    
    .cm-toc--headings {
        background: linear-gradient(135deg, #2a2a2a 0%, #2a3a4a 100%);
    }
    
    .cm-toc__link {
        color: #b0b0b0;
    }
    
    .cm-toc__link:hover {
        color: #4a9eff;
        background: rgba(74, 158, 255, 0.1);
    }
    
    .cm-toc--separator .cm-toc__link {
        color: #adb5bd;
    }
    
    .cm-toc--separator .cm-toc__link:hover {
        color: #dee2e6;
        background: rgba(173, 181, 189, 0.1);
    }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
    .cm-toc {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
        background: white !important;
    }
    
    .cm-toc__link {
        color: #333 !important;
        text-decoration: underline;
    }
    
    .cm-toc__link:hover {
        transform: none;
        background: none !important;
    }
    
    .cm-toc-anchor {
        background: none !important;
        border: none !important;
        color: #333 !important;
    }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .cm-toc__link,
    .cm-toc-anchor {
        transition: none !important;
    }
    
    .cm-toc__link:hover {
        transform: none !important;
    }
    
    .cm-toc-anchor:target {
        animation: none !important;
        transform: none !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .cm-toc {
        border: 2px solid;
        background: white;
    }
    
    .cm-toc__link {
        border-left-width: 4px;
    }
    
    .cm-toc-anchor {
        border: 2px solid;
        background: white;
    }
}