/* ==========================================================================
   Blog Styles: blog index (blog.html) and long-form posts (character-cones.html)
   Loaded after style.css.
   ========================================================================== */

/* --- Blog Index --- */
.blog-featured-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    margin-bottom: 2.5rem;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.blog-featured-card:hover {
    border-color: var(--accent);
}

.blog-featured-banner {
    background: var(--banner-grad-1);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.75rem 2.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.blog-meta-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.blog-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent-border);
}

.blog-tag.emerald {
    background: var(--bg-surface);
    color: var(--text-secondary);
    border-color: var(--border-strong);
}

.blog-tag.purple {
    background: var(--bg-surface);
    color: var(--text-secondary);
    border-color: var(--border-strong);
}

.blog-featured-body {
    padding: 2.25rem;
}

.blog-featured-title {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.28;
    margin: 0 0 1rem 0;
}

.blog-featured-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease;
}

.blog-featured-title a:hover {
    color: var(--accent);
}

.blog-featured-excerpt {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.blog-highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0 2rem;
}

.blog-highlight-item {
    background: var(--bg-surface-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 1rem 1.15rem;
}

.blog-highlight-num {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--accent);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    display: block;
    margin-bottom: 0.25rem;
}

.blog-highlight-desc {
    font-size: 0.83rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.blog-actions-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
}

/* --- Blog Posts --- */
/* Blog Post Header & Meta Bar */
.blog-post-topbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 0.75rem 1.15rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-card);
}

.blog-back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
    transition: all 0.15s ease;
}

.blog-back-link:hover {
    background: var(--accent);
    color: var(--accent-text);
}

.blog-meta-pills {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.blog-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--bg-surface-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

/* Enhanced Table of Contents Grid */
.blog-toc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 0.65rem 1.25rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.blog-toc-grid li {
    margin: 0;
    padding: 0;
}

.blog-toc-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.55rem 0.75rem;
    border-radius: 8px;
    background: var(--bg-surface-secondary);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.86rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.blog-toc-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateX(3px);
}

.blog-toc-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 6px;
    border-radius: 6px;
    background: var(--accent-soft);
    color: var(--accent);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.76rem;
    font-weight: 700;
    flex-shrink: 0;
}

.blog-toc-parts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 0.85rem;
}

.blog-toc-part {
    background: var(--bg-surface-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 0.9rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.blog-toc-part-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
    transition: color 0.15s ease;
}

.blog-toc-part-header:hover {
    color: var(--accent);
}

.blog-toc-sublist {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.blog-toc-sublink {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.25rem 0.35rem;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.blog-toc-sublink:hover {
    color: var(--accent);
    background: var(--bg-surface);
    transform: translateX(2px);
}

.blog-toc-subnum {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    flex-shrink: 0;
}

.deepdive-section .subsection-title {
    font-size: 1.32rem;
    font-weight: 750;
    color: var(--text-primary);
    margin: 2.5rem 0 0.85rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
    scroll-margin-top: 5rem;
}

.deepdive-section .deepdive-section-header + .subsection-title {
    margin-top: 0.5rem;
    padding-top: 0;
    border-top: none;
}

.subsubsection-title {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 1.65rem 0 0.65rem;
    scroll-margin-top: 5rem;
}

/* Key Metrics Stat Grid & Summary Card */
.blog-summary-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 1.75rem 2rem;
    box-shadow: var(--shadow-card);
    margin: 0 0 3rem 0;
}

.blog-summary-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 1.1rem;
    margin-bottom: 1.35rem;
    border-bottom: 1px solid var(--border-subtle);
}

.blog-summary-title-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.blog-summary-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
    color: var(--accent);
    width: fit-content;
    margin-bottom: 0.2rem;
}

.blog-summary-title {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0;
}

.blog-summary-subtitle {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin: 0;
}

.stat-grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 1rem;
    margin: 0 0 1.35rem 0;
}

.stat-box {
    background: var(--bg-surface-secondary);
    border: 1px solid var(--border-subtle);
    border-top: 3px solid var(--accent);
    border-radius: 12px;
    padding: 1.15rem 1rem;
    text-align: center;
}

.stat-box .stat-num {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 1.55rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
    margin-bottom: 0.35rem;
}

.stat-box .stat-lbl {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.blog-summary-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.blog-summary-col {
    background: var(--bg-surface-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 1.15rem 1.35rem;
}

.blog-summary-col-title {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--accent);
    margin: 0 0 0.75rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.blog-summary-dl {
    display: grid;
    grid-template-columns: minmax(110px, 36%) 1fr;
    gap: 0.55rem 0.75rem;
    margin: 0;
    font-size: 0.83rem;
    line-height: 1.5;
}

.blog-summary-dl dt {
    color: var(--text-muted);
    font-weight: 600;
    margin: 0;
}

.blog-summary-dl dd {
    color: var(--text-primary);
    margin: 0;
}

.blog-summary-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
    padding-top: 1.1rem;
    border-top: 1px solid var(--border-subtle);
}

.blog-summary-links-label {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-right: 0.25rem;
}

/* Article Lists (compensating for global * reset) */
.blog-list {
    margin: 0.75rem 0 1.35rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.75;
}

.blog-list li {
    margin-bottom: 0.55rem;
}

.blog-list li strong {
    color: var(--text-primary);
}

.blog-list ul {
    margin: 0.4rem 0 0.5rem 1.4rem;
}

/* Interactive Visualization Panels */
.viz-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 1.4rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-card);
    clear: both;
}

.viz-panel-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.1rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--border-subtle);
}

.viz-panel-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.viz-panel-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0.3rem 0 0 0;
    line-height: 1.45;
}

.viz-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.viz-btn {
    background: var(--bg-surface-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 0.45rem 0.85rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.15s ease;
}

.viz-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent);
}

.viz-btn.active {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}

.plotly-box {
    width: 100%;
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
}

.iframe-3d-wrap {
    width: 100%;
    height: 680px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    background: #0b1120;
}

.iframe-3d-wrap iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.slider-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-surface-secondary);
    padding: 0.75rem 1.15rem;
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    margin-bottom: 1rem;
}

.slider-bar label {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 115px;
}

.slider-bar input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
    cursor: pointer;
}

/* Data Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    margin: 1.5rem 0 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    box-shadow: var(--shadow-card);
    clear: both;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.86rem;
    text-align: left;
}

.data-table th {
    background: var(--bg-surface-secondary);
    color: var(--text-primary);
    font-weight: 700;
    padding: 0.85rem 1rem;
    border-bottom: 2px solid var(--border-subtle);
    white-space: nowrap;
}

.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    vertical-align: middle;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: rgba(59, 130, 246, 0.04);
}

.data-table code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    background: var(--bg-surface-secondary);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    color: var(--accent);
    font-size: 0.82rem;
}

.plot-grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 16px;
}

.plotly-box.plot-h-sm {
    height: 460px;
}

.plotly-box.plot-h-md {
    height: 520px;
}

.plotly-box.plot-h-lg {
    height: 680px;
}

.plotly-box.plot-h-xl {
    height: 850px;
}

.iframe-3d-wrap.iframe-tall {
    height: 740px;
}

.data-table caption {
    text-align: left;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    font-size: 0.82rem;
    border-bottom: 1px solid var(--border-subtle);
}

.blog-details {
    margin: 1.5rem 0;
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    background: var(--bg-surface-secondary);
    padding: 0.85rem 1.25rem;
}

.blog-details > summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--accent);
    font-size: 0.92rem;
}

.blog-details[open] > summary {
    margin-bottom: 1rem;
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--border-subtle);
}

.reference-list li {
    margin: 1rem 0;
    overflow-wrap: anywhere;
}

@media (max-width: 850px) {
    .plotly-box.plot-h-xl {
        height: 950px;
    }
}