/**
 * Blog styles — Thomas Pasley
 * Extends assets/css/redesign.css (linked before this file).
 */

/* ==================== BLOG NAV ==================== */
/* Disable the scroll-spy active-link logic from redesign.js on blog pages.
   Blog nav links use href page URLs, not #anchors, so no override needed. */

/* ==================== BLOG HERO ==================== */
.blog-hero {
    padding: 140px 2rem 70px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.blog-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 50% at 50% -10%, rgba(16, 185, 129, 0.25) 0%, transparent 70%);
    pointer-events: none;
}

.blog-hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--text-primary) 60%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    position: relative;
}

.blog-hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    position: relative;
}

/* ==================== TAG FILTER ==================== */
.tag-filter {
    display: flex;
    gap: 0.625rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

.filter-btn {
    padding: 0.45rem 1.1rem;
    border-radius: 100px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.825rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.filter-btn:hover {
    border-color: rgba(16, 185, 129, 0.4);
    color: var(--text-secondary);
}

.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* ==================== POSTS SECTION ==================== */
.posts-section {
    padding: 2rem 2rem 100px;
}

.posts-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

/* ==================== POST CARDS ==================== */
.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(8px);
    opacity: 0;
    transform: translateY(16px);
    animation: cardFadeIn 0.5s ease forwards;
}

@keyframes cardFadeIn {
    to { opacity: 1; transform: translateY(0); }
}

.post-card:hover {
    border-color: rgba(16, 185, 129, 0.4);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(16, 185, 129, 0.08);
}

/* Featured card — side-by-side layout */
.post-card.featured {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
}

.card-visual {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.14), rgba(34, 197, 94, 0.06));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    border-right: 1px solid var(--border-color);
    overflow: hidden;
}

.card-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    margin: -3rem -2rem;
    width: calc(100% + 4rem);
    height: calc(100% + 6rem);
}

.card-visual svg {
    width: 100%;
    max-width: 240px;
    height: auto;
    opacity: 0.8;
}

.card-body {
    padding: 2.25rem;
}

.post-card.featured .card-body {
    padding: 2.75rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Regular posts grid */
.regular-posts {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
    margin-top: 1.25rem;
}

.regular-posts .post-card .card-body {
    padding: 1.75rem;
}

/* Card internals */
.card-featured-label {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary-light);
    background: rgba(16, 185, 129, 0.12);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    margin-bottom: 1.25rem;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.875rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.post-card.featured .card-title {
    font-size: 1.65rem;
}

.card-excerpt {
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.75;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.5rem;
}

.card-tag {
    font-size: 0.73rem;
    font-weight: 500;
    color: var(--primary-light);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.18);
    padding: 0.2rem 0.65rem;
    border-radius: 100px;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--primary-light);
    font-size: 0.875rem;
    font-weight: 600;
    transition: gap 0.2s ease, color 0.2s ease;
}

.card-link:hover {
    gap: 0.7rem;
    color: var(--primary);
}

/* Empty state */
.posts-empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    display: none;
    grid-column: 1 / -1;
}

.posts-empty.visible {
    display: block;
}

/* ==================== POST PAGE ==================== */
.post-page-wrapper {
    padding-top: 80px;
    min-height: 100vh;
}

.post-header {
    max-width: 780px;
    margin: 0 auto;
    padding: 56px 2rem 36px;
}

.post-header-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.825rem;
    color: var(--text-muted);
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
}

.post-header-breadcrumb a {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--text-muted);
    transition: color 0.2s;
}

.post-header-breadcrumb a:hover {
    color: var(--primary-light);
}

.post-header-breadcrumb .sep {
    opacity: 0.4;
}

.post-date-read {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.825rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.post-date-read span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.post-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 1.1rem;
}

.post-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.post-tag {
    font-size: 0.775rem;
    font-weight: 500;
    color: var(--primary-light);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 0.28rem 0.8rem;
    border-radius: 100px;
}

.post-header-divider {
    max-width: 780px;
    margin: 0 auto;
    border: none;
    border-top: 1px solid var(--border-color);
}

/* ==================== PROSE (article body) ==================== */
.post-article {
    max-width: 780px;
    margin: 0 auto;
    padding: 2.5rem 2rem 7rem;
}

.prose {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.85;
}

.prose h2 {
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 2.75rem 0 0.875rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.prose h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 2rem 0 0.625rem;
}

.prose p {
    margin-bottom: 1.4rem;
}

.prose ul {
    list-style: disc;
    padding-left: 1.5rem;
    margin-bottom: 1.4rem;
}

.prose ol {
    list-style: decimal;
    padding-left: 1.5rem;
    margin-bottom: 1.4rem;
}

.prose li {
    margin-bottom: 0.45rem;
    color: var(--text-secondary);
}

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

.prose a {
    color: var(--primary-light);
    text-decoration: underline;
    text-decoration-color: rgba(129, 140, 248, 0.35);
    text-underline-offset: 2px;
    transition: text-decoration-color 0.2s;
}

.prose a:hover {
    text-decoration-color: var(--primary-light);
}

.prose code {
    font-family: 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.88em;
    background: var(--bg-secondary);
    color: var(--secondary);
    padding: 0.18em 0.48em;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.prose pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem 1.75rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    position: relative;
}

.prose pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.prose blockquote {
    border-left: 3px solid var(--primary);
    padding: 0.25rem 0 0.25rem 1.5rem;
    margin: 1.75rem 0;
    color: var(--text-muted);
    font-style: italic;
}

.prose hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2.5rem 0;
}

.prose .callout {
    background: rgba(16, 185, 129, 0.07);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--border-radius);
    padding: 1.1rem 1.4rem;
    margin: 1.5rem 0;
}

/* Figures */
.prose figure {
    margin: 2rem 0;
}

.prose figure img {
    width: 100%;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: block;
}

.prose figcaption {
    font-size: 0.815rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.625rem;
    font-style: italic;
    line-height: 1.5;
}

/* Tables */
.prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}

.prose th {
    font-weight: 600;
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    border-bottom: 2px solid var(--border-color);
    text-align: left;
    background: var(--bg-secondary);
}

.prose td {
    padding: 0.55rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.prose tr:last-child td { border-bottom: none; }
.prose tr:hover td { background: rgba(255,255,255,0.02); }

/* Viz panel figures */
.viz-figure { margin-bottom: 0.25rem; }
.viz-figure img {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: block;
}
.viz-figure-caption {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
    font-style: italic;
    line-height: 1.45;
}

.prose .callout-label {
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary-light);
    margin-bottom: 0.45rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* ==================== VIZ PANEL ==================== */
:root {
    --viz-w: clamp(320px, 36vw, 480px);
}

.viz-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 490;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}

.viz-backdrop.active {
    opacity: 1;
    pointer-events: all;
}

.viz-panel {
    position: fixed;
    top: 0;
    right: calc(-1 * var(--viz-w) - 4px); /* fully off-screen */
    width: var(--viz-w);
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid rgba(148, 163, 184, 0.15);
    z-index: 500;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.viz-panel.open {
    right: 0;
    box-shadow: -8px 0 40px rgba(0, 0, 0, 0.4);
}

/* Pull tab — sits on the left edge of the panel, always visible */
.viz-pull-tab {
    position: absolute;
    left: -44px;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 130px;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 10px 0 0 10px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: none;
    color: white;
    transition: background 0.2s, width 0.2s, left 0.2s;
    box-shadow: -4px 0 16px rgba(16, 185, 129, 0.35);
    z-index: 501;
}

.viz-pull-tab:hover {
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 100%);
    width: 48px;
    left: -48px;
}

.viz-pull-tab .tab-icon {
    font-size: 1rem;
    line-height: 1;
}

.viz-pull-tab .tab-label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-family: 'Fira Code', monospace;
    opacity: 0.9;
}

.viz-pull-tab .tab-chevron {
    font-size: 0.65rem;
    transition: transform 0.35s ease;
}

.viz-panel.open .viz-pull-tab .tab-chevron {
    transform: rotate(180deg);
}

/* Panel header */
.viz-panel-header {
    padding: 1.25rem 1.5rem 1rem;
    padding-top: calc(80px + 1.25rem); /* clear fixed nav */
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.viz-panel-title {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

.viz-close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.4rem;
    line-height: 1;
    padding: 0.25rem 0.35rem;
    border-radius: 6px;
    transition: color 0.2s, background 0.2s;
}

.viz-close-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

/* Panel tab nav */
.viz-tab-nav {
    display: flex;
    padding: 0 0.75rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    overflow-x: auto;
    scrollbar-width: none;
}

.viz-tab-nav::-webkit-scrollbar { display: none; }

.viz-tab-btn {
    padding: 0.8rem 0.875rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.2s, border-color 0.2s;
    font-family: inherit;
    letter-spacing: 0.03em;
    margin-bottom: -1px;
}

.viz-tab-btn:hover { color: var(--text-primary); }
.viz-tab-btn.active {
    color: var(--primary-light);
    border-bottom-color: var(--primary);
}

/* Panel content */
.viz-content {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-tertiary) transparent;
}

.viz-content::-webkit-scrollbar { width: 4px; }
.viz-content::-webkit-scrollbar-track { background: transparent; }
.viz-content::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 2px;
}

.viz-pane {
    display: none;
    padding: 1.5rem;
}

.viz-pane.active { display: block; }

/* Viz item within a pane */
.viz-item { margin-bottom: 2rem; }
.viz-item:last-child { margin-bottom: 0; }

.viz-item-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.viz-item-title::before {
    content: '';
    display: block;
    width: 3px;
    height: 14px;
    background: var(--primary);
    border-radius: 2px;
    flex-shrink: 0;
}

.viz-item-body {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}

.viz-item-body svg { width: 100%; height: auto; display: block; }
.viz-item-body canvas { width: 100% !important; }

/* Concept cards */
.concept-card {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 0.9rem 1rem;
    margin-bottom: 0.6rem;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s;
}

.concept-card:last-child { margin-bottom: 0; }

.concept-card:hover { border-color: rgba(16, 185, 129, 0.3); }

.concept-card-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 0.3rem;
    font-family: 'Fira Code', monospace;
}

.concept-card-def {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin: 0;
}

/* ==================== CODE BLOCKS ==================== */
.code-block {
    margin: 1.5rem 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.08);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 1rem;
    background: #111111;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-lang {
    font-family: 'Fira Code', monospace;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary-light);
}

.code-copy {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.75rem;
    padding: 0.2rem 0.55rem;
    border-radius: 5px;
    transition: color 0.2s, background 0.2s;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.code-copy:hover { color: var(--text-primary); background: rgba(255,255,255,0.07); }
.code-copy.copied { color: var(--primary-light); }

/* Override prose pre inside a code-block wrapper */
.code-block .prose pre,
.prose .code-block pre {
    margin: 0;
    border-radius: 0;
    border: none;
    background: #141414;
    padding: 1.35rem 1.5rem;
}

/* ---- Prism token colours (Catppuccin-inspired, fits dark grey bg) ---- */
code[class*="language-"],
pre[class*="language-"] {
    text-shadow: none !important;
    background: none !important;
    font-family: 'Fira Code', monospace !important;
    font-size: 0.875rem !important;
    line-height: 1.7 !important;
    color: #cdd6f4;
}

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata          { color: #45475a; font-style: italic; }

.token.punctuation    { color: #9399b2; }

.token.number,
.token.boolean,
.token.constant,
.token.symbol         { color: #fab387; } /* orange  */

.token.string,
.token.char,
.token.attr-value     { color: #a6e3a1; } /* green   */

.token.operator,
.token.entity         { color: #89dceb; } /* teal    */

.token.keyword,
.token.atrule         { color: #cba6f7; } /* violet  */

.token.function,
.token.function-name  { color: #89b4fa; } /* blue    */

.token.class-name,
.token.variable       { color: #f9e2af; } /* yellow  */

.token.regex,
.token.important      { color: #f38ba8; } /* pink    */

.token.builtin,
.token.selector       { color: #a6e3a1; } /* green   */

/* Bash-specific */
.language-bash .token.function { color: #89b4fa; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 900px) {
    :root { --viz-w: calc(100vw - 48px); }

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

    .card-visual { display: none; }
}

@media (max-width: 640px) {
    :root { --viz-w: 100vw; }

    .blog-hero { padding: 120px 1.25rem 56px; }

    .posts-section { padding: 1.5rem 1.25rem 80px; }

    .regular-posts { grid-template-columns: 1fr; }

    .post-header { padding: 40px 1.25rem 28px; }

    .post-article { padding: 2rem 1.25rem 5rem; }

    .viz-pull-tab {
        height: 110px;
        width: 40px;
        left: -40px;
        border-radius: 8px 0 0 8px;
    }
}