/* ============================================================
   BLOG SECTION - Stylesheet
   guitar-chords-lessons.com/v2/blog/
   Extends the main v2 stylesheet
   ============================================================ */

/* ------------------------------------------------------------
   Blog Sub-Navigation
   ------------------------------------------------------------ */
.blog-subnav {
    background: var(--color-bg-card);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    position: sticky;
    top: 0;
    z-index: 90;
    overflow: hidden;
}

.blog-subnav-inner {
    display: flex;
    gap: 0;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent-dark) transparent;
    padding: 0 var(--space-md);
    max-width: 1400px;
    margin: 0 auto;
    -webkit-overflow-scrolling: touch;
}

.blog-subnav-inner::-webkit-scrollbar {
    height: 3px;
}

.blog-subnav-inner::-webkit-scrollbar-track {
    background: transparent;
}

.blog-subnav-inner::-webkit-scrollbar-thumb {
    background: var(--color-accent-dark);
    border-radius: 3px;
}

.blog-subnav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2xs);
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    flex-shrink: 0;
}

.blog-subnav-link:hover {
    color: var(--color-text-primary);
    background: rgba(255,255,255,0.03);
}

.blog-subnav-link.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.blog-subnav-icon {
    font-size: 1.1em;
}

.blog-subnav-text {
    display: inline;
}

@media (max-width: 768px) {
    .blog-subnav {
        display: none;
    }
    .blog-subnav-text {
        display: none;
    }
    .blog-subnav-link {
        padding: var(--space-xs) var(--space-sm);
    }
    .blog-subnav-icon {
        font-size: 1.3em;
    }
}

/* ------------------------------------------------------------
   Breadcrumbs
   ------------------------------------------------------------ */
.blog-breadcrumbs {
    padding: var(--space-md) 0 0;
    max-width: 900px;
    margin: 0 auto;
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2xs);
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: var(--fs-xs);
    font-family: var(--font-body);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    color: var(--color-text-muted);
}

.breadcrumb-item::after {
    content: '›';
    margin-left: var(--space-2xs);
    color: var(--color-text-muted);
    opacity: 0.5;
}

.breadcrumb-item:last-child::after {
    display: none;
}

.breadcrumb-item a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumb-item a:hover {
    color: var(--color-accent);
}

.breadcrumb-item.current {
    color: var(--color-text-primary);
}

/* ------------------------------------------------------------
   Blog Article Layout
   ------------------------------------------------------------ */
.blog-article-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md) var(--space-3xl);
}

.blog-article-header {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.blog-article-category {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: var(--space-sm);
}

.blog-article-title {
    font-family: var(--font-body);
    font-size: var(--fs-2xl);
    font-weight: var(--fw-black);
    color: var(--color-text-primary);
    line-height: var(--lh-tight);
    margin: 0 0 var(--space-md);
    letter-spacing: -0.5px;
}

.blog-article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    font-family: var(--font-body);
}

.blog-article-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2xs);
}

.blog-article-level {
    display: inline-block;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-article-level[data-level="beginner"] {
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
}

.blog-article-level[data-level="intermediate"] {
    background: rgba(232, 168, 56, 0.15);
    color: #e8a838;
}

.blog-article-level[data-level="advanced"] {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.blog-article-level[data-level="all"] {
    background: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
}

/* Article Table of Contents */
.blog-toc {
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.blog-toc-title {
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-bold);
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0 0 var(--space-sm);
}

.blog-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.blog-toc-list li {
    padding: var(--space-2xs) 0;
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

.blog-toc-list li:last-child {
    border-bottom: none;
}

.blog-toc-list a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--fs-sm);
    transition: color 0.2s;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

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

.blog-toc-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: var(--radius-full);
    background: rgba(232, 168, 56, 0.12);
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: var(--fw-bold);
    flex-shrink: 0;
}

/* Article Content Sections */
.blog-article-content {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: var(--lh-relaxed);
    color: var(--color-text-primary);
}

.blog-section {
    margin-bottom: var(--space-2xl);
    scroll-margin-top: 140px;
}

.blog-section-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-bg-dark);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    font-weight: var(--fw-bold);
    margin-right: var(--space-xs);
    flex-shrink: 0;
}

.blog-section h2 {
    display: flex;
    align-items: center;
    font-family: var(--font-body);
    font-size: var(--fs-xl);
    font-weight: var(--fw-bold);
    color: var(--color-text-primary);
    margin: 0 0 var(--space-md);
    line-height: var(--lh-snug);
}

.blog-section h3 {
    font-family: var(--font-body);
    font-size: var(--fs-lg);
    font-weight: var(--fw-semibold);
    color: var(--color-text-primary);
    margin: var(--space-lg) 0 var(--space-sm);
}

.blog-section p {
    margin: 0 0 var(--space-md);
    color: var(--color-text-secondary);
    line-height: var(--lh-relaxed);
}

.blog-section ul,
.blog-section ol {
    margin: 0 0 var(--space-md);
    padding-left: var(--space-lg);
    color: var(--color-text-secondary);
}

.blog-section li {
    margin-bottom: var(--space-xs);
    line-height: var(--lh-normal);
}

.blog-section strong {
    color: var(--color-text-primary);
    font-weight: var(--fw-semibold);
}

.blog-section a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(232, 168, 56, 0.3);
    transition: border-color 0.2s;
}

.blog-section a:hover {
    border-bottom-color: var(--color-accent);
}

/* Pro Tips / Call-out boxes */
.blog-tip {
    background: rgba(232, 168, 56, 0.08);
    border-left: 3px solid var(--color-accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
}

.blog-tip-label {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-bold);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-2xs);
}

.blog-warning {
    background: rgba(239, 68, 68, 0.08);
    border-left: 3px solid var(--color-danger);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
}

.blog-warning-label {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-bold);
    color: var(--color-danger);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-2xs);
}

/* Code/Tab blocks */
.blog-code-block {
    background: var(--color-bg-deepest);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
    overflow-x: auto;
    white-space: pre;
}

/* Key takeaway box */
.blog-key-takeaway {
    background: var(--color-bg-elevated);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
}

.blog-key-takeaway h4 {
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-bold);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0 0 var(--space-sm);
}

.blog-key-takeaway ul {
    margin: 0;
    padding-left: var(--space-lg);
}

.blog-key-takeaway li {
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

/* ------------------------------------------------------------
   FAQ Section
   ------------------------------------------------------------ */
.blog-faq-section {
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(255,255,255,0.06);
}

.blog-faq-title {
    font-family: var(--font-body);
    font-size: var(--fs-xl);
    font-weight: var(--fw-black);
    color: var(--color-text-primary);
    margin: 0 0 var(--space-2xs);
    text-align: center;
}

.blog-faq-subtitle {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    text-align: center;
    margin: 0 0 var(--space-2xl);
}

.blog-faq-level-group {
    margin-bottom: var(--space-xl);
}

.blog-faq-level-heading {
    font-family: var(--font-body);
    font-size: var(--fs-md);
    font-weight: var(--fw-bold);
    color: var(--color-text-primary);
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid;
    margin: 0 0 var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.blog-faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.blog-faq-item {
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s;
}

.blog-faq-item:hover {
    border-color: rgba(255,255,255,0.08);
}

.blog-faq-item[open] {
    border-color: rgba(232, 168, 56, 0.2);
}

.blog-faq-question {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: var(--fs-base);
    font-weight: var(--fw-medium);
    color: var(--color-text-primary);
    list-style: none;
    user-select: none;
}

.blog-faq-question::-webkit-details-marker {
    display: none;
}

.blog-faq-q-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background: rgba(232, 168, 56, 0.15);
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: var(--fw-bold);
    flex-shrink: 0;
}

.blog-faq-toggle {
    margin-left: auto;
    width: 20px;
    height: 20px;
    position: relative;
    flex-shrink: 0;
}

.blog-faq-toggle::before,
.blog-faq-toggle::after {
    content: '';
    position: absolute;
    background: var(--color-text-muted);
    transition: transform 0.25s;
}

.blog-faq-toggle::before {
    top: 50%;
    left: 3px;
    right: 3px;
    height: 2px;
    transform: translateY(-50%);
}

.blog-faq-toggle::after {
    left: 50%;
    top: 3px;
    bottom: 3px;
    width: 2px;
    transform: translateX(-50%);
}

.blog-faq-item[open] .blog-faq-toggle::after {
    transform: translateX(-50%) rotate(90deg);
    opacity: 0;
}

.blog-faq-answer {
    display: flex;
    gap: var(--space-sm);
    padding: 0 var(--space-lg) var(--space-lg);
    animation: faqSlideIn 0.2s ease;
}

@keyframes faqSlideIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.blog-faq-a-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background: rgba(74, 222, 128, 0.12);
    color: #4ade80;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: var(--fw-bold);
    flex-shrink: 0;
    margin-top: 2px;
}

.blog-faq-answer-text {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: var(--lh-relaxed);
}

.blog-faq-answer-text p {
    margin: 0 0 var(--space-sm);
}

.blog-faq-answer-text p:last-child {
    margin-bottom: 0;
}

.blog-faq-read-more a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: var(--fw-medium);
    border-bottom: 1px solid rgba(232, 168, 56, 0.3);
    transition: border-color 0.2s;
}

.blog-faq-read-more a:hover {
    border-bottom-color: var(--color-accent);
}

/* ------------------------------------------------------------
   Related Articles Grid
   ------------------------------------------------------------ */
.blog-related-section {
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(255,255,255,0.06);
}

.blog-related-title {
    font-family: var(--font-body);
    font-size: var(--fs-xl);
    font-weight: var(--fw-bold);
    color: var(--color-text-primary);
    margin: 0 0 var(--space-lg);
}

.blog-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-md);
}

.blog-related-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-decoration: none;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.blog-related-card:hover {
    border-color: rgba(232, 168, 56, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.blog-related-category {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-xs);
}

.blog-related-card-title {
    font-family: var(--font-body);
    font-size: var(--fs-md);
    font-weight: var(--fw-semibold);
    color: var(--color-text-primary);
    margin: 0 0 var(--space-xs);
    line-height: var(--lh-snug);
}

.blog-related-card-desc {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    line-height: var(--lh-normal);
    margin: 0;
    flex-grow: 1;
}

.blog-related-read-more {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-accent);
    margin-top: var(--space-sm);
}

/* ------------------------------------------------------------
   Blog Index / Category Pages
   ------------------------------------------------------------ */
.blog-hero {
    text-align: center;
    padding: var(--space-3xl) var(--space-md) var(--space-2xl);
}

.blog-hero-title {
    font-family: var(--font-body);
    font-size: var(--fs-3xl);
    font-weight: var(--fw-black);
    color: var(--color-text-primary);
    margin: 0 0 var(--space-sm);
    letter-spacing: -1px;
}

.blog-hero-title span {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-hero-desc {
    font-size: var(--fs-md);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: var(--lh-normal);
}

/* Category Grid */
.blog-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-md);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md) var(--space-3xl);
}

.blog-category-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-decoration: none;
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.blog-category-card:hover {
    border-color: rgba(232, 168, 56, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.4);
}

.blog-category-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.blog-category-card-title {
    font-family: var(--font-body);
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    color: var(--color-text-primary);
    margin: 0 0 var(--space-xs);
}

.blog-category-card-desc {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    line-height: var(--lh-normal);
    margin: 0 0 var(--space-md);
    flex-grow: 1;
}

.blog-category-count {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-accent);
}

/* Topic List within Category */
.blog-topic-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--space-md) var(--space-3xl);
}

.blog-topic-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    text-decoration: none;
    transition: border-color 0.2s, background 0.2s;
}

.blog-topic-item:hover {
    border-color: rgba(232, 168, 56, 0.2);
    background: var(--color-bg-card-hover);
}

.blog-topic-item-title {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    font-weight: var(--fw-medium);
    color: var(--color-text-primary);
    flex-grow: 1;
}

.blog-topic-item-level {
    font-size: var(--fs-xs);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: var(--fw-semibold);
    flex-shrink: 0;
}

.blog-topic-item-arrow {
    color: var(--color-text-muted);
    transition: transform 0.2s, color 0.2s;
}

.blog-topic-item:hover .blog-topic-item-arrow {
    transform: translateX(3px);
    color: var(--color-accent);
}

/* Search Bar */
.blog-search {
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
    padding: 0 var(--space-md);
}

.blog-search-input {
    width: 100%;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--fs-base);
    outline: none;
    transition: border-color 0.2s;
}

.blog-search-input::placeholder {
    color: var(--color-text-muted);
}

.blog-search-input:focus {
    border-color: var(--color-accent);
}

/* Pagination */
.blog-pagination {
    display: flex;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-2xl) var(--space-md);
}

.blog-pagination a,
.blog-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    text-decoration: none;
    transition: all 0.2s;
}

.blog-pagination a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.blog-pagination .active {
    background: var(--color-accent);
    color: var(--color-bg-dark);
    border-color: var(--color-accent);
    font-weight: var(--fw-bold);
}