/* ===========================================
   Blog Post — Premium Reading Experience
   =========================================== */

/* --- Reading Progress Bar --- */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-orange), #f97316, #fbbf24);
    z-index: 9999;
    border-radius: 0 2px 2px 0;
    transition: width 0.08s linear;
    box-shadow: 0 0 10px rgba(234, 88, 12, 0.5);
}

/* --- Classic Hero --- */
.blog-hero {
    padding: 40px 0 60px;
    text-align: center;
    max-width: 900px;
    margin-inline: auto;
}

.blog-meta-tags {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.blog-category-badge {
    background: var(--accent-orange);
    color: white;
    padding: 5px 14px;
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.blog-dot {
    opacity: 0.5;
}

.blog-post-title {
    font-size: 3.8rem;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 20px;
    color: var(--text-primary);
    line-height: 1.1;
}

.blog-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

.blog-featured-img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: 24px;
    margin-bottom: 60px;
    box-shadow: var(--shadow-subtle);
    display: block;
}

/* --- Article Layout --- */
.blog-article-wrapper {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 60px;
    align-items: start;
    max-width: 1060px;
    margin: 0 auto;
    padding-bottom: 80px;
}

/* --- Sticky Table of Contents --- */
.blog-toc {
    position: sticky;
    top: 100px;
    background: var(--bento-bg);
    border: 1px solid var(--bento-border);
    border-radius: 18px;
    padding: 22px;
    box-shadow: var(--shadow-subtle);
}

.blog-toc-title {
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    margin-bottom: 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--bento-border);
}

.blog-toc ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.blog-toc ul li a {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: 8px 10px;
    border-radius: 8px;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.blog-toc ul li a:hover,
.blog-toc ul li a.active {
    color: var(--accent-orange);
    border-left-color: var(--accent-orange);
    background: rgba(234, 88, 12, 0.05);
    padding-left: 14px;
}

/* --- Blog Content --- */
.blog-content-body {
    font-size: 1.1rem;
    line-height: 1.85;
    color: var(--text-secondary);
    min-width: 0;
}

/* Lead paragraph */
.blog-lead {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--text-primary);
    font-weight: 500;
    border-left: 3px solid var(--accent-orange);
    background: rgba(234, 88, 12, 0.04);
    padding: 20px 24px;
    border-radius: 0 12px 12px 0;
    margin-bottom: 40px;
}

.blog-content-body h2 {
    font-size: 1.9rem;
    color: var(--text-primary);
    margin: 55px 0 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
    scroll-margin-top: 120px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.blog-content-body h2::before {
    content: '';
    width: 4px;
    height: 28px;
    background: var(--accent-orange);
    border-radius: 4px;
    flex-shrink: 0;
}

.blog-content-body p {
    margin-bottom: 24px;
}

.blog-content-body strong {
    color: var(--text-primary);
    font-weight: 700;
}

/* Inline code */
.blog-content-body code {
    background: rgba(234, 88, 12, 0.07);
    border: 1px solid rgba(234, 88, 12, 0.2);
    padding: 1px 7px;
    border-radius: 5px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--accent-orange);
}

/* Callout box */
.blog-callout {
    background: var(--bento-bg);
    border: 1px solid var(--bento-border);
    border-left: 4px solid var(--accent-orange);
    border-radius: 0 14px 14px 0;
    padding: 20px 24px;
    margin: 35px 0;
}

.blog-callout p {
    margin: 0;
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.6;
}

.blog-divider {
    border: none;
    border-top: 1px solid var(--bento-border);
    margin: 60px 0;
}

/* --- Author Card --- */
.blog-author-card {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--bento-bg);
    border: 1px solid var(--bento-border);
    border-radius: 20px;
    padding: 28px 32px;
    box-shadow: var(--shadow-subtle);
}

.blog-author-avatar {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: var(--bento-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: none;
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
}

.blog-author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 50%;
}

.blog-author-info h4 {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.blog-author-info p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0 0 12px;
    line-height: 1.5;
}

.blog-author-cta {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent-orange);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s ease;
}

.blog-author-cta:hover {
    gap: 10px;
}

/* --- Post Navigation --- */
.post-nav-row {
    display: flex;
    gap: 16px;
    justify-content: space-between;
    margin-top: 50px;
    flex-wrap: wrap;
}

.post-nav-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 24px;
    border: 1px solid var(--bento-border);
    border-radius: 16px;
    background: var(--bento-bg);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    flex: 1;
    min-width: 0;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-subtle);
}

.post-nav-btn:hover {
    border-color: var(--accent-orange);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(234, 88, 12, 0.1);
}

.post-nav-btn--next {
    justify-content: flex-end;
    text-align: right;
}

.post-nav-btn span {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    overflow: hidden;
}

.post-nav-btn small {
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent-orange);
}

.post-nav-btn i {
    color: var(--accent-orange);
    font-size: 1rem;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.post-nav-btn:hover i { transform: translateX(3px); }
.post-nav-btn--next:hover i { transform: translateX(3px); }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .blog-article-wrapper {
        grid-template-columns: 1fr;
        max-width: 760px;
    }
    .blog-toc {
        position: static;
    }
}

@media (max-width: 768px) {
    .blog-hero { padding: 30px 20px; }
    .blog-post-title { font-size: 2.2rem; letter-spacing: -1px; }
    .blog-subtitle { font-size: 1rem; }
    .blog-featured-img { height: 240px; margin-bottom: 40px; border-radius: 16px; }
    .blog-content-body h2 { font-size: 1.5rem; margin-top: 40px; }
    .blog-author-card { flex-direction: column; text-align: center; padding: 24px 20px; }
    .post-nav-row { flex-direction: column; }
}