.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    z-index: 120;
}

.reading-progress-bar {
    display: block;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    transition: width 0.1s ease;
}

.blog-hero {
    padding: 7rem 0 3rem;
    text-align: center;
    position: relative;
    background: radial-gradient(circle at top, rgba(59, 130, 246, 0.12), rgba(17, 24, 39, 0.1) 55%, rgba(17, 24, 39, 0.95) 100%);
}

.blog-category {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent-blue);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.5rem;
}

.blog-dek {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 2rem auto;
    max-width: 60ch;
}

.blog-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.blog-hero-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.blog-share {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
}

.blog-share-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.blog-share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.share-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid rgba(59, 130, 246, 0.3);
    background: rgba(59, 130, 246, 0.12);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.share-button:hover {
    transform: translateY(-1px);
    border-color: rgba(59, 130, 246, 0.7);
    background: rgba(59, 130, 246, 0.2);
}

.share-copy {
    background: rgba(139, 92, 246, 0.15);
    border-color: rgba(139, 92, 246, 0.4);
}

.blog-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 3rem;
    padding: 3rem 0 5rem;
    align-items: start;
}

.blog-content {
    min-width: 0;
}

.content-wrap {
    max-width: 820px;
}

.blog-sidebar {
    position: relative;
}

.blog-sidebar-inner {
    position: sticky;
    top: 120px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.blog-card {
    background: var(--surface-card);
    border: 1px solid var(--surface-border);
    border-radius: 1rem;
    padding: 1.5rem;
}

.blog-card-label {
    display: block;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.toc {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toc a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.35rem 0;
    border-inline-start: 2px solid transparent;
    padding-inline-start: 0.85rem;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.toc a.active,
.toc a:hover {
    color: var(--accent-blue);
    border-inline-start-color: var(--accent-blue);
}

.toc a.toc-sub {
    font-size: 0.82rem;
    padding-inline-start: 1.5rem;
}

.blog-divider {
    border: none;
    border-top: 1px solid var(--surface-border);
    margin: 2.5rem 0;
}

.blog-table {
    overflow-x: auto;
    margin: 2rem 0;
}

.blog-cta {
    margin-top: 4rem;
    padding: 2.5rem;
    border-radius: 1.5rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(124, 58, 237, 0.18));
    border: 1px solid rgba(59, 130, 246, 0.3);
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: center;
    justify-content: space-between;
}

.blog-cta-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.blog-cta-content p {
    max-width: 55ch;
}

.blog-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.author-card {
    margin-top: 3rem;
    background: var(--surface-card);
    border: 1px solid var(--surface-border);
    border-radius: 1.5rem;
    padding: 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.author-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(59, 130, 246, 0.4);
}

.author-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    font-weight: 600;
}

.author-role {
    color: var(--accent-blue);
    margin: 0.25rem 0 0.75rem;
    font-weight: 600;
}

.author-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
}

.author-link:hover {
    color: var(--accent-purple);
}

.blog-newsletter {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.9), rgba(124, 58, 237, 0.9));
    color: #ffffff;
    border: none;
}

.blog-newsletter h3,
.blog-newsletter p {
    color: #ffffff;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.newsletter-form input {
    padding: 0.85rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.95);
    color: #1f2937;
    font-size: 0.95rem;
}

.newsletter-form input:focus {
    outline: none;
    border-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.newsletter-form button {
    padding: 0.85rem 1rem;
    border-radius: 0.5rem;
    border: none;
    background: #ffffff;
    color: #1e3a8a;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.newsletter-form button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

.newsletter-form button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.newsletter-success,
.newsletter-error {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
}

.newsletter-success {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid rgba(34, 197, 94, 0.4);
}

.newsletter-error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.4);
}

@media (max-width: 1024px) {
    .blog-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .blog-sidebar {
        order: 2;
    }

    .blog-sidebar-inner {
        position: static;
    }
}

@media (max-width: 768px) {
    .blog-hero {
        padding: 6rem 0 2.5rem;
    }

    .blog-hero-footer {
        flex-direction: column;
        align-items: center;
    }

    .blog-share {
        align-items: center;
    }

    .blog-cta {
        flex-direction: column;
        text-align: center;
    }

    .blog-cta-actions {
        justify-content: center;
    }

    .author-card {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .blog-meta {
        gap: 1rem;
    }

    .blog-share-buttons {
        justify-content: center;
    }
}