/* =============================================================
   Karbontex · blog-detay-page.css
   Pattern: ElitEducation blog-detail (proven editorial layout).
   Full-bleed hero + content/sidebar grid + 3-col more.
   ============================================================= */


/* ============ READING PROGRESS BAR ============ */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(14, 27, 51, 0.06);
    z-index: 9999;
    pointer-events: none;
}

.reading-progress .rp-fill {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-cyan));
    transform: scaleX(0);
    transform-origin: 0 50%;
    transition: transform 0.05s linear;
}


/* ============ PAGE WRAPPER ============ */
.blog-detail-page { padding-bottom: 0; }


/* ============ HERO — full-bleed bg image, white text ============ */
.blog-detail-page .bd-hero {
    position: relative;
    min-height: 460px;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    margin-bottom: 0;
}

.blog-detail-page .bd-hero-image {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.blog-detail-page .bd-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-detail-page .bd-hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(10, 31, 74, 0.30) 0%, rgba(10, 31, 74, 0.55) 50%, rgba(10, 31, 74, 0.85) 100%);
}

.blog-detail-page .bd-hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 140px 20px 56px;
}

.blog-detail-page .bd-wrapper {
    max-width: var(--container-max);
    margin: 0 auto;
}


/* Breadcrumb */
.blog-detail-page .bd-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.blog-detail-page .bd-breadcrumb a {
    color: rgba(255, 255, 255, 0.75);
    transition: color 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.blog-detail-page .bd-breadcrumb a:hover { color: #fff; }

.blog-detail-page .bd-breadcrumb-sep { color: rgba(255, 255, 255, 0.4); }

.blog-detail-page .bd-breadcrumb-current { color: rgba(255, 255, 255, 0.95); font-weight: 600; }


/* Category */
.blog-detail-page .bd-category {
    display: inline-block;
    padding: 6px 12px;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--brand-cyan);
    background: rgba(63, 205, 255, 0.16);
    border-radius: 6px;
    margin-bottom: 22px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}


/* Title */
.blog-detail-page .bd-title {
    font-family: var(--font-body);
    font-size: clamp(1.875rem, 4.2vw, 3rem);
    font-weight: 600;
    line-height: 1.12;
    letter-spacing: -0.024em;
    color: #fff;
    max-width: 880px;
    margin-bottom: 26px;
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
}


/* Meta row */
.blog-detail-page .bd-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.blog-detail-page .bd-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.02em;
}

.blog-detail-page .bd-meta-item i { opacity: 0.75; }


/* ============ BODY: prose + sidebar grid ============ */
.blog-detail-page .bd-body {
    padding: 50px 20px 70px;
    background: var(--bg);
}

.blog-detail-page .bd-wrapper--content {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: start;
    min-width: 0;
}


/* Back link */
.blog-detail-page .bd-back {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--brand-primary);
    margin-bottom: 22px;
    transition: gap 0.25s ease;
    letter-spacing: -0.005em;
}

.blog-detail-page .bd-back:hover { gap: 14px; }

.blog-detail-page .bd-back i { transition: transform 0.25s ease; }

.blog-detail-page .bd-back:hover i { transform: translateX(-3px); }


/* ----------- Prose card ----------- */
.blog-detail-page .bd-prose {
    min-width: 0;
    background: var(--bg-soft);
    border-radius: 22px;
    padding: 44px 52px 52px;
    box-shadow: 0 1px 2px rgba(14, 27, 51, 0.04), 0 8px 32px -12px rgba(14, 27, 51, 0.08);
}

.blog-detail-page .bd-prose-header {
    margin-bottom: 36px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(14, 27, 51, 0.06);
}

.blog-detail-page .bd-prose-title {
    font-family: var(--font-body);
    font-size: clamp(1.625rem, 2.4vw, 2rem);
    font-weight: 600;
    color: var(--ink);
    line-height: 1.18;
    letter-spacing: -0.022em;
    margin: 0 0 16px;
}

.blog-detail-page .bd-lead {
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 0;
    letter-spacing: -0.005em;
}

.blog-detail-page .bd-prose-h2 {
    font-family: var(--font-body);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--ink);
    margin-top: 40px;
    margin-bottom: 14px;
    line-height: 1.25;
    letter-spacing: -0.014em;
    scroll-margin-top: 100px;
}

.blog-detail-page .bd-prose-h2:first-of-type { margin-top: 0; }

.blog-detail-page .bd-prose p {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--ink-soft);
    margin-bottom: 22px;
}

.blog-detail-page .bd-prose p strong {
    color: var(--ink);
    font-weight: 600;
}


/* Blockquote */
.blog-detail-page .bd-prose blockquote {
    margin: 36px 0;
    padding: 24px 30px;
    background: linear-gradient(135deg, rgba(63, 205, 255, 0.08), rgba(27, 127, 255, 0.04));
    border-left: 4px solid var(--brand-primary);
    border-radius: 0 14px 14px 0;
}

.blog-detail-page .bd-prose blockquote p {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    font-weight: 500;
    font-style: italic;
    color: var(--ink);
    margin-bottom: 0;
    line-height: 1.6;
}


/* Inline links */
.blog-detail-page .bd-prose a {
    color: var(--brand-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    font-weight: 600;
    transition: color 0.2s ease;
}

.blog-detail-page .bd-prose a:hover { color: var(--brand-primary-dark); }


/* CTA inline */
.blog-detail-page .bd-cta {
    margin-top: 48px;
    padding: 26px 30px;
    background: rgba(14, 27, 51, 0.03);
    border-radius: 14px;
}

.blog-detail-page .bd-cta p {
    margin-bottom: 0;
    font-size: 0.9375rem;
    color: var(--ink);
}


/* ----------- Sidebar ----------- */
.blog-detail-page .bd-sidebar {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 100px;
}


/* Sidebar label (used for tags etc.) */
.blog-detail-page .bd-tags-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-mute);
    margin-bottom: 14px;
}


/* Related (TOC repurposed as sidebar nav) */
.blog-detail-page .bd-related {
    background: var(--bg-soft);
    border-radius: 16px;
    padding: 24px 26px;
    box-shadow: 0 1px 2px rgba(14, 27, 51, 0.04);
}

.blog-detail-page .bd-related-title {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--ink);
    margin: 0 0 18px;
    letter-spacing: -0.005em;
}

.blog-detail-page .bd-related-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(14, 27, 51, 0.06);
    color: inherit;
    transition: all 0.2s ease;
}

.blog-detail-page .bd-related-item:last-child { border-bottom: none; padding-bottom: 0; }
.blog-detail-page .bd-related-item:first-of-type { padding-top: 0; }

.blog-detail-page .bd-related-item:hover .bd-related-text { color: var(--brand-primary); }
.blog-detail-page .bd-related-item:hover .bd-related-cat { color: var(--brand-primary); }

.blog-detail-page .bd-related-cat {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ink-mute);
    letter-spacing: 0.04em;
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.blog-detail-page .bd-related-text {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ink);
    line-height: 1.4;
    transition: color 0.2s ease;
    letter-spacing: -0.005em;
}


/* Tags card */
.blog-detail-page .bd-tags-card {
    background: var(--bg-soft);
    border-radius: 16px;
    padding: 22px 24px;
    box-shadow: 0 1px 2px rgba(14, 27, 51, 0.04);
}

.blog-detail-page .bd-tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.blog-detail-page .bd-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 6px;
    background: var(--bg-2);
    color: var(--ink);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.25s ease;
}

.blog-detail-page .bd-tag:hover {
    background: var(--brand-primary);
    color: #fff;
}


/* Sidebar CTA card (dark) */
.blog-detail-page .bd-cta-card {
    padding: 26px 26px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--ink), var(--bg-deep));
    color: var(--ink-on-dark);
    position: relative;
    overflow: hidden;
}

.blog-detail-page .bd-cta-card::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(63, 205, 255, 0.30), transparent 65%);
    filter: blur(40px);
    pointer-events: none;
}

.blog-detail-page .bd-cta-card-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--brand-cyan);
    font-weight: 500;
    padding: 5px 9px;
    background: rgba(63, 205, 255, 0.14);
    border-radius: 6px;
    margin-bottom: 12px;
    position: relative;
}

.blog-detail-page .bd-cta-card h4 {
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink-on-dark);
    margin: 0 0 8px;
    line-height: 1.25;
    letter-spacing: -0.012em;
    position: relative;
}

.blog-detail-page .bd-cta-card p {
    color: var(--ink-mute-on-dark);
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0 0 14px;
    position: relative;
}

.blog-detail-page .bd-cta-card .btn {
    background: var(--ink-on-dark);
    color: var(--ink);
    width: 100%;
    position: relative;
    z-index: 1;
}

.blog-detail-page .bd-cta-card .btn:hover {
    background: var(--brand-cyan);
    color: var(--ink);
}


/* ============ MORE — 3-col card grid ============ */
.blog-detail-page .bd-more {
    width: 100%;
    padding: 70px 20px 90px;
    background: var(--bg-2);
}

.blog-detail-page .bd-more-inner {
    max-width: var(--container-max);
    margin: 0 auto;
}

.blog-detail-page .bd-more-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 36px;
}

.blog-detail-page .bd-more-title {
    font-family: var(--font-body);
    font-size: clamp(1.5rem, 2.4vw, 1.875rem);
    font-weight: 600;
    color: var(--ink);
    margin: 0;
    letter-spacing: -0.022em;
}

.blog-detail-page .bd-more-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--brand-primary);
    transition: gap 0.25s ease;
    letter-spacing: -0.005em;
}

.blog-detail-page .bd-more-link:hover { gap: 12px; color: var(--brand-primary-dark); }


/* More grid */
.blog-detail-page .bd-more-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.blog-detail-page .bd-more-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--bg-soft);
    border-radius: 18px;
    overflow: hidden;
    color: inherit;
    box-shadow: 0 2px 12px -4px rgba(14, 27, 51, 0.06);
    transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.blog-detail-page .bd-more-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px -12px rgba(14, 27, 51, 0.16);
}

.blog-detail-page .bd-more-media {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--bg-2);
}

.blog-detail-page .bd-more-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.blog-detail-page .bd-more-card:hover .bd-more-media img { transform: scale(1.06); }

.blog-detail-page .bd-more-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    padding: 5px 10px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--brand-primary);
    background: rgba(255, 255, 255, 0.95);
    border-radius: 6px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.blog-detail-page .bd-more-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px 24px 26px;
}

.blog-detail-page .bd-more-card-title {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    font-weight: 600;
    line-height: 1.32;
    letter-spacing: -0.012em;
    color: var(--ink);
    margin: 0 0 12px;
    transition: color 0.25s ease;
}

.blog-detail-page .bd-more-card:hover .bd-more-card-title { color: var(--brand-primary); }

.blog-detail-page .bd-more-excerpt {
    font-family: var(--font-body);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 0 0 20px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-detail-page .bd-more-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 14px;
    border-top: 1px solid rgba(14, 27, 51, 0.06);
    margin-top: auto;
}

.blog-detail-page .bd-more-meta {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--ink-mute);
    letter-spacing: 0.02em;
}

.blog-detail-page .bd-more-meta + .bd-more-meta {
    padding-left: 12px;
    border-left: 1px solid rgba(14, 27, 51, 0.10);
}

.blog-detail-page .bd-more-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--brand-primary);
    transition: gap 0.25s ease;
    letter-spacing: -0.005em;
}

.blog-detail-page .bd-more-card:hover .bd-more-cta { gap: 10px; }

.blog-detail-page .bd-more-cta i { transition: transform 0.25s ease; }

.blog-detail-page .bd-more-card:hover .bd-more-cta i { transform: translateX(3px); }


/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .blog-detail-page .bd-wrapper--content {
        grid-template-columns: 1fr;
    }

    .blog-detail-page .bd-sidebar {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 16px;
    }

    .blog-detail-page .bd-tags-card {
        flex: 1;
        min-width: 240px;
    }

    .blog-detail-page .bd-related,
    .blog-detail-page .bd-cta-card {
        flex: 1 1 100%;
    }

    .blog-detail-page .bd-more-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .blog-detail-page .bd-hero { min-height: 380px; }
    .blog-detail-page .bd-hero-content { padding: 110px 20px 44px; }
    .blog-detail-page .bd-title { font-size: clamp(1.5rem, 6vw, 2rem); }
    .blog-detail-page .bd-meta { gap: 16px; }
    .blog-detail-page .bd-body { padding: 30px 16px 50px; }
    .blog-detail-page .bd-prose { padding: 32px 26px 36px; border-radius: 18px; }
    .blog-detail-page .bd-prose-title { font-size: 1.5rem; }
    .blog-detail-page .bd-prose-h2 { font-size: 1.25rem; }
    .blog-detail-page .bd-prose p { font-size: 0.9375rem; }
    .blog-detail-page .bd-more-grid { grid-template-columns: 1fr; }
    .blog-detail-page .bd-more { padding: 50px 16px 64px; }
}

@media (max-width: 480px) {
    .blog-detail-page .bd-hero { min-height: 300px; }
    .blog-detail-page .bd-hero-content { padding: 100px 14px 32px; }
    .blog-detail-page .bd-title { font-size: clamp(1.375rem, 6.5vw, 1.75rem); margin-bottom: 18px; }
    .blog-detail-page .bd-meta { gap: 10px 14px; font-size: 0.75rem; }
    .blog-detail-page .bd-meta-item { font-size: 0.75rem; }
    .blog-detail-page .bd-category { font-size: 0.625rem; padding: 5px 10px; margin-bottom: 16px; }
    .blog-detail-page .bd-body { padding: 24px 14px 40px; }
    .blog-detail-page .bd-prose { padding: 24px 18px 28px; border-radius: 14px; }
    .blog-detail-page .bd-prose-title { font-size: 1.375rem; }
    .blog-detail-page .bd-prose-h2 { font-size: 1.125rem; margin-top: 28px; }
    .blog-detail-page .bd-prose p { font-size: 0.9375rem; }
    .blog-detail-page .bd-prose blockquote { padding: 18px 20px; }
    .blog-detail-page .bd-cta { padding: 18px 20px; }
    .blog-detail-page .bd-sidebar { flex-direction: column; gap: 14px; }
    .blog-detail-page .bd-related,
    .blog-detail-page .bd-tags-card,
    .blog-detail-page .bd-cta-card { padding: 20px; }
    .blog-detail-page .bd-cta-card .btn { width: 100%; justify-content: center; }
    .blog-detail-page .bd-more { padding: 44px 14px 56px; }
    .blog-detail-page .bd-more-card { border-radius: 14px; }
    .blog-detail-page .bd-more-body { padding: 20px 20px 22px; }
    .blog-detail-page .bd-more-card-title { font-size: 1rem; }
}