/* ============================================
   Pixia - Blog
   Listing page (blog.html) + article template (blog-tool.html)
   Uses the design tokens defined in css/style.css.
   ============================================ */

/* Elements toggled from JS use the hidden attribute; several of them set an
   explicit display value, which would otherwise win over the UA [hidden] rule. */
[hidden] {
    display: none !important;
}

/* ---------- Listing: toolbar (search + categories) ---------- */
.blog-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.blog-search {
    position: relative;
    flex: 1 1 260px;
    max-width: 420px;
}

.blog-search svg {
    position: absolute;
    inset-inline-start: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-tertiary);
    pointer-events: none;
}

.blog-search input {
    width: 100%;
    padding-block: 12px;
    padding-inline: 44px 40px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-full);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.blog-search input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.15);
}

.blog-search-clear {
    position: absolute;
    inset-inline-end: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-tertiary);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.blog-search-clear:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

.blog-search.has-value .blog-search-clear {
    display: inline-flex;
}

.blog-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.blog-chip {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.blog-chip:hover {
    color: var(--text-primary);
    border-color: var(--glass-border-hover);
    transform: translateY(-1px);
}

.blog-chip.active {
    color: #fff;
    background: var(--gradient-secondary);
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(255, 152, 0, 0.3);
}

/* ---------- Listing: grid ---------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
    margin-top: 36px;
}

.blog-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.blog-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-card-body {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    padding: 24px;
}

/* ---------- Card media (CSS gradient + tool icon) ---------- */
.blog-media {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 168px;
    overflow: hidden;
    isolation: isolate;
}

.blog-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 40%, rgba(0, 0, 0, 0.28) 100%);
    z-index: 1;
}

.blog-media-icon {
    width: 60px;
    height: 60px;
    color: rgba(255, 255, 255, 0.95);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
    transition: transform var(--transition-spring);
    z-index: 2;
}

.blog-card:hover .blog-media-icon {
    transform: scale(1.12) rotate(-3deg);
}

.blog-media-pattern {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.35;
    background-image: radial-gradient(rgba(255, 255, 255, 0.6) 1.5px, transparent 1.5px);
    background-size: 22px 22px;
    mask-image: radial-gradient(circle at 70% 30%, #000 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(circle at 70% 30%, #000 0%, transparent 70%);
}

.blog-media .blog-badge {
    position: absolute;
    top: 14px;
    inset-inline-start: 14px;
    z-index: 3;
    margin: 0;
    background: rgba(255, 255, 255, 0.92);
    color: #1f2937;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Category gradients */
.media-cat-tutorial { background: linear-gradient(135deg, #ff9800, #ffc947); }
.media-cat-tips     { background: linear-gradient(135deg, #10b981, #34d399); }
.media-cat-guide    { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.media-cat-news     { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.media-cat-convert  { background: linear-gradient(135deg, #0ea5e9, #22d3ee); }
.media-cat-security { background: linear-gradient(135deg, #4f46e5, #6366f1); }
.media-cat-ai       { background: linear-gradient(135deg, #d946ef, #a855f7); }
.media-cat-print    { background: linear-gradient(135deg, #ef4444, #f97316); }
.media-cat-web      { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.media-cat-general  { background: linear-gradient(135deg, #64748b, #94a3b8); }

/* ---------- Card text ---------- */
.blog-badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius-full);
    width: fit-content;
}

.badge-tutorial { background: rgba(255, 152, 0, 0.14); color: #ff9800; }
.badge-tips     { background: rgba(16, 185, 129, 0.14); color: #10b981; }
.badge-news     { background: rgba(245, 158, 11, 0.14); color: #f59e0b; }
.badge-guide    { background: rgba(139, 92, 246, 0.14); color: #8b5cf6; }
.badge-convert  { background: rgba(14, 165, 233, 0.14); color: #0ea5e9; }
.badge-security { background: rgba(79, 70, 229, 0.14); color: #6366f1; }
.badge-ai       { background: rgba(217, 70, 239, 0.14); color: #d946ef; }

.blog-title {
    font-size: 19px;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 10px;
}

.blog-desc {
    color: var(--text-secondary);
    font-size: 14.5px;
    line-height: 1.65;
    margin-bottom: 18px;
    flex-grow: 1;
}

.blog-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 14px;
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.blog-meta-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--text-muted);
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-primary);
    font-size: 14px;
    font-weight: 600;
    transition: gap var(--transition-fast);
}

.blog-link svg {
    transition: transform var(--transition-fast);
}

.blog-card:hover .blog-link {
    gap: 10px;
}

/* ---------- Empty state + load more ---------- */
.blog-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 64px 24px;
    color: var(--text-secondary);
}

.blog-empty svg {
    width: 48px;
    height: 48px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.blog-empty p {
    font-size: 16px;
}

.blog-loadmore-wrap {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.blog-loadmore {
    padding: 12px 32px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
}

.blog-loadmore:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-1px);
}

/* ---------- Newsletter band ---------- */
.blog-newsletter {
    position: relative;
    max-width: 760px;
    margin: 72px auto 0;
    padding: 48px 32px;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.12), rgba(255, 201, 71, 0.05));
    border: 1px solid rgba(255, 152, 0, 0.22);
    border-radius: var(--border-radius-xl);
}

.blog-newsletter-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--gradient-secondary);
    color: #fff;
}

.blog-newsletter h2 {
    font-family: var(--font-display);
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 800;
    margin-bottom: 10px;
}

.blog-newsletter p {
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto 24px;
    font-size: 15px;
    line-height: 1.7;
}

.blog-newsletter-form {
    display: flex;
    gap: 10px;
    max-width: 460px;
    margin: 0 auto;
}

.blog-newsletter-form input {
    flex: 1;
    padding: 12px 18px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-full);
}

.blog-newsletter-form input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.15);
}

.blog-newsletter-status {
    margin-top: 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-emerald);
    min-height: 20px;
}

/* ============================================
   Article (blog-tool.html)
   ============================================ */
.post-progress {
    position: fixed;
    top: 0;
    inset-inline-start: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 1200;
    transition: width 0.08s linear;
}

.post-crumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 20px;
}

.post-crumb a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.post-crumb a:hover {
    color: var(--accent-primary);
}

.post-crumb svg {
    width: 14px;
    height: 14px;
    opacity: 0.6;
}

[dir="rtl"] .post-crumb svg {
    transform: scaleX(-1);
}

.post-header {
    max-width: 760px;
    margin: 0 auto;
    padding-top: 20px;
}

.post-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
    transition: color var(--transition-fast);
}

.post-back:hover {
    color: var(--accent-primary);
}

[dir="rtl"] .post-back svg {
    transform: scaleX(-1);
}

.post-badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius-full);
    margin-bottom: 16px;
}

.post-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 5vw, 44px);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.post-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.post-meta-divider {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-tertiary);
}

.post-author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.post-author-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
}

/* Two-column layout: article + sticky TOC */
.post-layout {
    max-width: 1080px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 264px;
    gap: 56px;
    align-items: start;
}

.post-layout.no-toc {
    grid-template-columns: minmax(0, 1fr);
    max-width: 760px;
}

.post-main {
    min-width: 0;
}

.post-aside {
    position: sticky;
    top: calc(var(--nav-height) + 24px);
}

.post-toc {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 22px;
}

.post-toc-title {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    margin-bottom: 14px;
}

.post-toc ol {
    list-style: none;
    counter-reset: toc;
}

.post-toc a {
    display: block;
    padding: 6px 0 6px 14px;
    font-size: 13.5px;
    line-height: 1.45;
    color: var(--text-secondary);
    border-inline-start: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.post-toc a:hover {
    color: var(--text-primary);
}

.post-toc a.active {
    color: var(--accent-primary);
    border-inline-start-color: var(--accent-primary);
}

.post-toc a.toc-h3 {
    padding-inline-start: 26px;
    font-size: 12.5px;
}

/* Article body */
.post-body {
    padding-bottom: 48px;
}

.post-body h2 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin: 40px 0 16px;
    line-height: 1.3;
    scroll-margin-top: calc(var(--nav-height) + 24px);
}

.post-body h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    margin: 32px 0 12px;
    line-height: 1.3;
    scroll-margin-top: calc(var(--nav-height) + 24px);
}

.post-body p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.post-body ul {
    margin: 0 0 20px;
    padding-inline-start: 24px;
    color: var(--text-secondary);
    line-height: 1.8;
    list-style: disc;
}

.post-body li {
    margin-bottom: 8px;
    font-size: 16px;
}

.post-body blockquote {
    border-inline-start: 3px solid var(--accent-primary);
    padding: 16px 20px;
    margin: 24px 0;
    background: rgba(255, 152, 0, 0.05);
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
}

[dir="rtl"] .post-body blockquote {
    border-radius: var(--border-radius-md) 0 0 var(--border-radius-md);
}

.post-body blockquote p {
    margin: 0;
    font-style: italic;
    color: var(--text-secondary);
}

.post-body a {
    color: var(--accent-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.post-body a:hover {
    opacity: 0.8;
}

.post-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.post-cta {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    text-align: center;
    margin: 40px 0;
}

.post-cta h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.post-cta p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 15px;
}

.post-cta .btn-primary {
    color: #fff;
}

.post-cta .btn-primary:hover {
    color: #fff;
}

/* Tags */
.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 24px;
    border-top: 1px solid var(--glass-border);
    margin-top: 40px;
}

.post-tag {
    padding: 4px 14px;
    font-size: 13px;
    font-weight: 500;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: var(--border-radius-full);
    transition: all var(--transition-fast);
}

.post-tag:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* Share + author box */
.post-share {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 32px 0;
    padding: 18px 22px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
}

.post-share-label {
    font-size: 14px;
    font-weight: 600;
    margin-inline-end: 6px;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    color: var(--text-secondary);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    color: #fff;
    background: var(--gradient-secondary);
    border-color: transparent;
    transform: translateY(-2px);
}

.share-btn svg {
    width: 17px;
    height: 17px;
}

.author-box {
    display: flex;
    gap: 16px;
    padding: 24px;
    margin: 32px 0;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
}

.author-box-avatar {
    flex: none;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    background: var(--gradient-primary);
}

.author-box-name {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 4px;
}

.author-box-role {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.author-box-bio {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Prev / next */
.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin: 0 0 40px;
}

.post-nav-link {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.post-nav-link:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.post-nav-link.next {
    text-align: end;
}

.post-nav-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 6px;
}

.post-nav-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

/* Related */
.related-section {
    margin: 0 0 60px;
}

.related-section h2 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.related-card {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.related-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.related-card-badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--border-radius-full);
    margin-bottom: 10px;
    width: fit-content;
}

.related-card h3 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.related-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .post-layout,
    .post-layout.no-toc {
        grid-template-columns: minmax(0, 1fr);
        max-width: 760px;
        gap: 0;
    }

    .post-aside {
        position: static;
        order: -1;
        margin-bottom: 32px;
    }
}


@media (max-width: 640px) {
    .blog-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .blog-search {
        max-width: none;
    }

    .blog-grid {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .blog-newsletter {
        padding: 36px 20px;
    }

    .blog-newsletter-form {
        flex-direction: column;
    }

    .post-nav {
        grid-template-columns: 1fr;
    }

    .post-nav-link.next {
        text-align: start;
    }

    .post-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .post-meta-divider {
        display: none;
    }
}