/* Blog Enhanced - Universal visual components for all blog posts
   Scoped to .blog-enhanced to avoid conflicts with existing blog.css
   Speaking-specific components remain in blog-speaking-guide.css */

/* =============================================
   COLOR SYSTEM - Universal Accents
   ============================================= */
.blog-enhanced {
    --accent-color: #5353a6;
    --accent-bg: #f0eef9;
    --info-color: #17a2b8;
    --info-bg: #e8f4f8;
    --warning-color: #ffc107;
    --warning-bg: #fff3cd;
    --success-color: #28a745;
    --success-bg: #d4edda;
    --danger-color: #dc3545;
    --danger-bg: #f8d7da;
    --neutral-bg: #f8f9fa;
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.15);
    --transition-speed: 0.3s;
}

/* =============================================
   SUBTITLE
   ============================================= */
.blog-enhanced .blog-subtitle {
    font-size: 1.3rem;
    color: var(--text-medium);
    text-align: center;
    margin-top: -0.5rem;
    margin-bottom: var(--spacing-md);
    font-style: italic;
    line-height: 1.5;
}

/* =============================================
   READING TIME
   ============================================= */
.blog-enhanced .reading-time {
    display: inline-block;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-left: 0.5rem;
}

/* =============================================
   PROGRESS BAR
   ============================================= */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, #5353a6, #7b7bcc, #00c9db, #00f0ff);
    z-index: 9999;
    transition: width 0.1s linear;
}

/* =============================================
   TABLE OF CONTENTS
   ============================================= */
.blog-enhanced .toc {
    background: var(--neutral-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--accent-color);
}

.blog-enhanced .toc-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.blog-enhanced .toc-title::after {
    content: '\25BC';
    font-size: 0.7rem;
    transition: transform var(--transition-speed);
}

.blog-enhanced .toc.collapsed .toc-title::after {
    transform: rotate(-90deg);
}

.blog-enhanced .toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    transition: max-height var(--transition-speed) ease, opacity var(--transition-speed) ease;
    overflow: hidden;
}

.blog-enhanced .toc.collapsed .toc-list {
    max-height: 0;
    opacity: 0;
}

.blog-enhanced .toc-list li {
    margin-bottom: 0.4rem;
}

.blog-enhanced .toc-list a {
    color: var(--text-medium);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    display: block;
    transition: background var(--transition-speed), color var(--transition-speed);
}

.blog-enhanced .toc-list a:hover {
    background: var(--accent-bg);
    color: var(--accent-color);
}

.blog-enhanced .toc-list a.active {
    background: var(--accent-bg);
    color: var(--accent-color);
    font-weight: 600;
}

/* Desktop sticky TOC */
@media (min-width: 1200px) {
    .blog-enhanced .toc {
        position: sticky;
        top: 20px;
        float: left;
        width: 220px;
        margin-left: -260px;
        margin-bottom: 0;
    }

    .blog-enhanced .toc.collapsed .toc-list {
        max-height: none;
        opacity: 1;
    }

    .blog-enhanced .toc-title::after {
        display: none;
    }
}

/* =============================================
   DISCOURSE / STYLED TABLES
   ============================================= */
.blog-enhanced .discourse-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin: var(--spacing-lg) 0;
}

.blog-enhanced .discourse-table th {
    background: var(--accent-color);
    color: white;
    padding: 0.8rem 1rem;
    text-align: left;
    font-weight: 700;
    font-size: 0.9rem;
}

.blog-enhanced .discourse-table td {
    padding: 0.7rem 1rem;
    border-bottom: 1px solid #eee;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.blog-enhanced .discourse-table tr:last-child td {
    border-bottom: none;
}

.blog-enhanced .discourse-table tr:nth-child(even) td {
    background: var(--neutral-bg);
}

.blog-enhanced .discourse-table .translation {
    color: var(--text-light);
    font-style: italic;
    font-size: 0.85rem;
}

/* =============================================
   CALLOUT BOXES
   ============================================= */
.blog-enhanced .callout {
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    border-left: 4px solid;
}

.blog-enhanced .callout.tip {
    background: var(--accent-bg);
    border-left-color: var(--accent-color);
}

.blog-enhanced .callout.info {
    background: var(--info-bg);
    border-left-color: var(--info-color);
}

.blog-enhanced .callout.warning {
    background: var(--warning-bg);
    border-left-color: var(--warning-color);
}

.blog-enhanced .callout.success {
    background: var(--success-bg);
    border-left-color: var(--success-color);
}

.blog-enhanced .callout.danger {
    background: var(--danger-bg);
    border-left-color: var(--danger-color);
}

.blog-enhanced .callout.neutral {
    background: var(--neutral-bg);
    border-left-color: #ccc;
}

.blog-enhanced .callout-title {
    font-weight: 700;
    margin-bottom: 0.3rem;
    font-size: 1rem;
}

.blog-enhanced .callout p {
    margin: 0.3rem 0;
}

.blog-enhanced .callout ul,
.blog-enhanced .callout ol {
    margin: 0.3rem 0;
    padding-left: var(--spacing-md);
}

.blog-enhanced .callout li {
    margin-bottom: 0.3rem;
}

/* =============================================
   MODEL ANSWER
   ============================================= */
.blog-enhanced .model-answer {
    background: var(--neutral-bg);
    border-left: 4px solid var(--accent-color);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-style: italic;
    line-height: 1.7;
    color: var(--text-dark);
}

.blog-enhanced .model-answer p {
    margin: 0.3rem 0;
}

.blog-enhanced .model-answer strong {
    font-style: normal;
}

/* =============================================
   KEYWORD HIGHLIGHT (Inline spans)
   ============================================= */
.blog-enhanced .keyword-highlight {
    background-color: var(--warning-bg);
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: bold;
}

/* =============================================
   FAQ ACCORDION
   ============================================= */
.blog-enhanced .faq-section {
    margin: var(--spacing-xl) 0;
}

.blog-enhanced .faq-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.blog-enhanced .faq-question {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
    transition: background var(--transition-speed);
}

.blog-enhanced .faq-question:hover {
    background: var(--neutral-bg);
}

.blog-enhanced .faq-question .faq-toggle {
    font-size: 1.2rem;
    color: var(--accent-color);
    transition: transform var(--transition-speed);
    flex-shrink: 0;
    margin-left: 1rem;
}

.blog-enhanced .faq-item.open .faq-toggle {
    transform: rotate(45deg);
}

.blog-enhanced .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.blog-enhanced .faq-item.open .faq-answer {
    max-height: 500px;
}

.blog-enhanced .faq-answer-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-medium);
    border-top: 1px solid #eee;
    padding-top: var(--spacing-md);
}

/* =============================================
   RELATED POSTS
   ============================================= */
.blog-enhanced .related-posts {
    margin: var(--spacing-xl) 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid #eee;
}

.blog-enhanced .related-posts h2 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-md);
}

.blog-enhanced .related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.blog-enhanced .related-post-card {
    background: white;
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--card-shadow);
    text-decoration: none;
    color: var(--text-dark);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    border-top: 3px solid var(--accent-color);
}

.blog-enhanced .related-post-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover);
}

.blog-enhanced .related-post-card h3 {
    font-size: 1rem;
    margin-bottom: 0.3rem;
    color: var(--text-dark);
}

.blog-enhanced .related-post-card p {
    font-size: 0.85rem;
    color: var(--text-medium);
    margin: 0;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
    .blog-enhanced .related-posts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .blog-enhanced .blog-subtitle {
        font-size: 1.1rem;
    }
}

/* =============================================
   HIGH CONTRAST MODE
   ============================================= */
@media (prefers-contrast: more) {
    .blog-enhanced .callout {
        border-left-width: 6px;
    }

    .blog-enhanced .faq-item {
        border: 2px solid #000;
    }

    .blog-enhanced .discourse-table {
        border: 2px solid #000;
    }

    .blog-enhanced .discourse-table th {
        background: #000;
    }

    .blog-enhanced .model-answer {
        border-left-width: 6px;
    }

    .blog-enhanced .related-post-card {
        border: 2px solid #000;
    }
}