/* Potato Lab Theme — Built CSS */

/* ============================================================
   Design Tokens — Potato Lab Theme
   ============================================================ */

:root {
    /* Brand colors */
    --color-primary: #E8870E;
    --color-primary-light: #F5A63C;
    --color-primary-dark: #C4700A;

    /* Background & surface */
    --color-bg: #FAFAF7;
    --color-surface: #FFFFFF;
    --color-surface-raised: #F5F0EB;

    /* Text */
    --color-text: #2D2D2D;
    --color-text-secondary: #6B6B6B;
    --color-text-muted: #9B9B9B;

    /* Borders */
    --color-border: #E8E2D9;
    --color-border-subtle: #F0EBE4;

    /* Code */
    --color-code-bg: #F5F0EB;
    --color-code-text: #C25A3C;

    /* Tag colors */
    --tag-product-design: #E8870E;
    --tag-serving: #A0522D;
    --tag-agent: #C25A3C;
    --tag-training: #B8680B;
    --tag-meta: #8B7D6B;

    /* Layout */
    --content-width: 720px;
    --toc-width: 220px;
    --header-height: 60px;
    --gutter-width: 60px;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.10);

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* Dark mode overrides */
[data-theme="dark"] {
    --color-bg: #1A1A1A;
    --color-surface: #242424;
    --color-surface-raised: #2A2A2A;

    --color-text: #E5E5E5;
    --color-text-secondary: #A0A0A0;
    --color-text-muted: #6B6B6B;

    --color-border: #333333;
    --color-border-subtle: #2A2A2A;

    --color-code-bg: #252525;
    --color-code-text: #F5A63C;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}


/* ============================================================
   Potato Lab Theme — Main Stylesheet
   ============================================================ */

/* ─── Reset & Base ─────────────────────────────────────── */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: clip;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: clip;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ─── Reading Progress Bar ──────────────────────────────── */

#reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--scroll-progress, 0%);
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    z-index: 1000;
    transition: width 50ms linear;
}

/* ─── Header ────────────────────────────────────────────── */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    height: var(--header-height);
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
    flex-shrink: 0;
}

.logo-icon {
    font-size: 1.25rem;
}

.logo-text {
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.site-logo:hover .logo-text {
    color: var(--color-primary);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
    border-bottom-color: var(--color-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-surface-raised);
    color: var(--color-text);
    border-color: var(--color-primary);
}

.sun-icon { display: none; }
.moon-icon { display: block; }

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }

.btn-subscribe {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 1rem;
    background-color: var(--color-primary);
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-subscribe:hover {
    background-color: var(--color-primary-dark);
    color: white;
    transform: translateY(-1px);
}

/* ─── Home: Brand Intro ──────────────────────────────────── */

.home-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.brand-intro {
    margin: 3rem 0 2.5rem;
    padding: 2rem 2.5rem;
    background: linear-gradient(135deg, rgba(232, 135, 14, 0.08) 0%, rgba(194, 90, 60, 0.06) 100%);
    border: 1px solid rgba(232, 135, 14, 0.2);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-lg);
}

.brand-intro-inner {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.brand-intro-logo {
    font-size: 2.5rem;
    flex-shrink: 0;
    line-height: 1;
}

.brand-tagline {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 0.75rem;
}

.brand-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.brand-audience-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.audience-tag {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* ─── Tag Filter ─────────────────────────────────────────── */

.posts-section {
    padding-bottom: 4rem;
}

.tag-filter-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.tag-filter-btn {
    padding: 0.35rem 0.9rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.tag-filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

/* ─── Post List & Cards ──────────────────────────────────── */

.post-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.post-card {
    display: grid;
    grid-template-columns: 1fr;
    padding: 1.75rem 0;
    border-bottom: 1px solid var(--color-border-subtle);
    transition: border-color var(--transition-fast);
}

.post-card:last-child {
    border-bottom: none;
}

.post-card-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.post-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.35;
    margin: 0;
}

.post-card-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.post-card-title a:hover {
    color: var(--color-primary);
}

.post-card-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.25rem;
}

.post-card-date,
.post-card-reading-time {
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

/* ─── Tag Chips ──────────────────────────────────────────── */

.tag-chip {
    display: inline-block;
    padding: 0.15rem 0.55rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.tag-chip:hover {
    opacity: 0.8;
    color: inherit;
}

.tag-chip--product-design {
    background-color: rgba(232, 135, 14, 0.12);
    color: var(--tag-product-design);
    border: 1px solid rgba(232, 135, 14, 0.25);
}

.tag-chip--serving {
    background-color: rgba(160, 82, 45, 0.12);
    color: var(--tag-serving);
    border: 1px solid rgba(160, 82, 45, 0.25);
}

.tag-chip--agent {
    background-color: rgba(194, 90, 60, 0.12);
    color: var(--tag-agent);
    border: 1px solid rgba(194, 90, 60, 0.25);
}

.tag-chip--training {
    background-color: rgba(184, 104, 11, 0.12);
    color: var(--tag-training);
    border: 1px solid rgba(184, 104, 11, 0.25);
}

.tag-chip--meta,
.tag-chip--secondary {
    background-color: rgba(139, 125, 107, 0.1);
    color: var(--tag-meta);
    border: 1px solid rgba(139, 125, 107, 0.2);
}

/* ─── Pagination ─────────────────────────────────────────── */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.pagination-btn {
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.pagination-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination-info {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ─── Post Layout (3-column) ─────────────────────────────── */

.post-layout {
    display: grid;
    grid-template-columns: var(--gutter-width) minmax(0, var(--content-width)) var(--toc-width) var(--gutter-width);
    grid-template-areas: "gutter-left content toc gutter-right";
    gap: 2rem;
    max-width: calc(var(--content-width) + var(--toc-width) + (var(--gutter-width) * 2) + 4rem);
    margin: 0 auto;
    padding: 0 1.5rem;
    align-items: start;
}

.post-gutter--left  { grid-area: gutter-left; }
.post-gutter--right { grid-area: gutter-right; }
.post-content-column { grid-area: content; }
.toc-sidebar        { grid-area: toc; }

/* ─── Post Header ────────────────────────────────────────── */

.post-header {
    padding: 2.5rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

.post-meta-top {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.post-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.post-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1.25rem;
    font-style: italic;
}

.post-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.post-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.author-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
}

.post-dateline {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.meta-separator {
    opacity: 0.4;
}

/* ─── Feature Image ──────────────────────────────────────── */

.post-feature-image {
    margin: 0 0 2rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.post-feature-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.post-feature-image figcaption {
    text-align: center;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    padding: 0.5rem 1rem;
    font-style: italic;
}

/* ─── Post Body Typography ───────────────────────────────── */

.post-body {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
}

.post-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin: 2.5rem 0 1rem;
    letter-spacing: -0.01em;
    color: var(--color-text);
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

.post-body h3 {
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.35;
    margin: 2rem 0 0.75rem;
    color: var(--color-text);
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

.post-body h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem;
    color: var(--color-text);
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

.post-body p {
    margin-bottom: 1.5rem;
}

.post-body ul,
.post-body ol {
    margin: 0 0 1.5rem 1.5rem;
    padding: 0;
}

.post-body li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

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

.post-body em {
    font-style: italic;
}

.post-body a {
    color: var(--color-primary);
    text-decoration: underline;
    text-decoration-color: rgba(232, 135, 14, 0.4);
    text-underline-offset: 2px;
    transition: text-decoration-color var(--transition-fast);
}

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

.post-body blockquote {
    margin: 2rem 0;
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--color-primary);
    background: var(--color-surface-raised);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 1.05rem;
    font-style: italic;
    color: var(--color-text-secondary);
}

.post-body blockquote p:last-child {
    margin-bottom: 0;
}

.post-body code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--color-code-bg);
    color: var(--color-code-text);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
}

.post-body pre {
    margin: 1.5rem 0;
    padding: 1.25rem 1.5rem;
    background: var(--color-code-bg);
    border-radius: var(--radius-md);
    overflow-x: auto;
    border: 1px solid var(--color-border);
}

.post-body pre code {
    background: none;
    color: var(--color-text);
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.6;
}

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

.post-body figure {
    margin: 2rem 0;
}

.post-body figure img {
    border-radius: var(--radius-md);
}

.post-body figcaption {
    text-align: center;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
    font-style: italic;
}

/* Full-bleed breakout for figures */
.post-body .kg-width-wide {
    margin: 2rem -4rem;
}

.post-body .kg-width-full {
    margin: 2rem calc(-50vw + 50%);
    max-width: 100vw;
}

/* Ghost card styles */
.post-body .kg-image-card,
.post-body .kg-embed-card {
    margin: 2rem 0;
}

.post-body .kg-image {
    border-radius: var(--radius-md);
}

/* ─── TOC Sidebar ────────────────────────────────────────── */

.toc-sidebar {
    align-self: stretch;
    padding-top: 2.5rem;
}

.toc-sticky {
    position: sticky;
    top: calc(var(--header-height) + 2rem);
    max-height: calc(100vh - var(--header-height) - 4rem);
    overflow-y: auto;
}

/* TOC floating button (mobile only, hidden on desktop) */
.toc-fab {
    display: none;
    position: fixed;
    bottom: 1.5rem;
    right: 1.25rem;
    z-index: 200;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 100px;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(232, 135, 14, 0.4);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.toc-fab:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 135, 14, 0.5);
}

.toc-fab svg {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
}

.toc-fab[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

/* TOC bottom sheet panel */
.toc-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 199;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 1rem 1.25rem 2rem;
    max-height: 60vh;
    overflow-y: auto;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.12);
    transform: translateY(100%);
    visibility: hidden;
    transition: transform 0.25s ease, visibility 0.25s ease;
}

.toc-panel.is-open {
    transform: translateY(0);
    visibility: visible;
}

.toc-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.toc-panel-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin: 0;
}

/* TOC backdrop */
.toc-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 198;
    background: rgba(0, 0, 0, 0.3);
}

.toc-backdrop.is-open {
    display: block;
}

.toc-collapsible {
    padding: 0 1rem 1rem;
}

.toc-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

.toc {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc a {
    display: block;
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: 0.25rem 0.5rem;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
    margin-bottom: 2px;
}

.toc a:hover {
    color: var(--color-text);
    background: var(--color-surface-raised);
}

.toc a.active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    font-weight: 500;
}

.toc .toc-h3 a {
    padding-left: 1.25rem;
    font-size: 0.76rem;
}

/* ─── Post Footer ────────────────────────────────────────── */

.post-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ─── Post Navigation ────────────────────────────────────── */

.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.post-nav-link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.post-nav-link:hover {
    border-color: var(--color-primary);
    background: var(--color-surface-raised);
}

.post-nav-link--next {
    text-align: right;
    grid-column: 2;
}

.post-nav-link--prev {
    grid-column: 1;
}

.post-nav-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-primary);
}

.post-nav-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ─── Footer ─────────────────────────────────────────────── */

.site-footer {
    border-top: 1px solid var(--color-border);
    margin-top: 4rem;
    padding: 2rem 0;
    background: var(--color-surface);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.footer-logo {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
}

.footer-tagline {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.footer-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-primary);
}

.footer-copyright {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ─── Page Layout ───────────────────────────────────────── */

.page-layout {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.page-content-column .post-header {
    padding: 2.5rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

/* ─── Utilities ──────────────────────────────────────────── */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Hidden cards (tag filter) */
.post-card.hidden {
    display: none;
}

/* ─── Responsive ─────────────────────────────────────────── */

/* Tablet: collapse to single column, TOC inline above content */
@media (max-width: 1100px) {
    .post-layout {
        display: block;
        max-width: var(--content-width);
        width: 100%;
        padding: 0 1.5rem;
    }

    .post-gutter--left,
    .post-gutter--right {
        display: none;
    }

    .post-content-column {
        width: 100%;
        min-width: 0;
    }

    .toc-sidebar {
        align-self: auto;
        padding-top: 1.5rem;
        padding-bottom: 0;
        width: 100%;
    }

    .toc-sticky {
        position: static;
        max-height: none;
        overflow: visible;
        background: var(--color-surface-raised);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 0;
        margin-bottom: 0;
    }
}

/* Mobile */
@media (max-width: 768px) {
    /* Header */
    .header-inner {
        padding: 0 1rem;
        gap: 0.75rem;
    }

    .site-nav {
        display: none;
    }

    .logo-text {
        font-size: 1rem;
    }

    /* Homepage */
    .home-container {
        padding: 0 1rem;
    }

    .brand-intro {
        margin: 1.5rem 0 2rem;
        padding: 1.25rem;
    }

    .brand-intro-inner {
        flex-direction: column;
        gap: 0.75rem;
    }

    .brand-intro-logo {
        font-size: 2rem;
    }

    .brand-tagline {
        font-size: 1.05rem;
    }

    .brand-description {
        font-size: 0.88rem;
    }

    .audience-tag {
        font-size: 0.72rem;
    }

    .tag-filter-bar {
        gap: 0.35rem;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem;
        scrollbar-width: none;
    }

    .tag-filter-bar::-webkit-scrollbar {
        display: none;
    }

    .tag-filter-btn {
        flex-shrink: 0;
        font-size: 0.8rem;
        padding: 0.3rem 0.75rem;
    }

    /* Post layout */
    .post-layout {
        padding: 0 1rem;
    }

    .post-title {
        font-size: 1.4rem;
        letter-spacing: -0.01em;
    }

    .post-header {
        padding: 1.5rem 0 1.5rem;
    }

    .post-meta-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }

    /* Post body */
    .post-body {
        font-size: 0.95rem;
    }

    .post-body h2 {
        font-size: 1.25rem;
    }

    .post-body h3 {
        font-size: 1.05rem;
    }

    .post-body pre {
        padding: 1rem;
        font-size: 0.8rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .post-body .kg-width-wide {
        margin: 2rem -1rem;
    }

    /* Koenig cards */
    .kg-bookmark-thumbnail {
        display: none;
    }

    /* Post navigation */
    .post-navigation {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .post-nav-link--next {
        grid-column: 1;
        text-align: left;
    }

    /* TOC on mobile: floating button + bottom sheet */
    .toc-fab {
        display: flex;
    }

    .toc-sidebar {
        display: none; /* hide the inline sidebar on mobile */
    }

    .toc a {
        font-size: 0.9rem;
        padding: 0.4rem 0.5rem;
    }

    .toc .toc-h3 a {
        padding-left: 1.5rem;
    }

    /* Post card */
    .post-card-title {
        font-size: 1.1rem;
    }
}

/* ─── Koenig Card Styles ─────────────────────────────────── */

/* Gallery */
.kg-gallery-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 2rem 0;
}

.kg-gallery-row {
    display: flex;
    gap: 0.5rem;
}

.kg-gallery-image {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    border-radius: var(--radius-sm);
}

.kg-gallery-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Bookmark */
.kg-bookmark-card {
    margin: 2rem 0;
}

.kg-bookmark-container {
    display: flex;
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-surface);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    color: var(--color-text);
}

.kg-bookmark-container:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    color: var(--color-text);
}

.kg-bookmark-content {
    flex: 1;
    padding: 1rem 1.25rem;
    min-width: 0;
}

.kg-bookmark-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 0.35rem;
    color: var(--color-text);
}

.kg-bookmark-description {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.kg-bookmark-metadata {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kg-bookmark-icon {
    width: 16px;
    height: 16px;
    object-fit: contain;
    flex-shrink: 0;
}

.kg-bookmark-author,
.kg-bookmark-publisher {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

.kg-bookmark-author::after {
    content: '·';
    margin-left: 0.35rem;
}

.kg-bookmark-thumbnail {
    width: 140px;
    flex-shrink: 0;
    overflow: hidden;
}

.kg-bookmark-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Callout */
.kg-callout-card {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    margin: 1.5rem 0;
}

.kg-callout-emoji {
    font-size: 1.25rem;
    line-height: 1.6;
    flex-shrink: 0;
}

.kg-callout-text {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text);
}

.kg-callout-text p:last-child { margin-bottom: 0; }

/* Toggle */
.kg-toggle-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: 1.5rem 0;
}

.kg-toggle-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.25rem;
    cursor: pointer;
    background: var(--color-surface);
    user-select: none;
}

.kg-toggle-heading h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
}

.kg-toggle-heading-text {
    font-size: 0.95rem;
    font-weight: 600;
}

.kg-toggle-card-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.kg-toggle-card[open] .kg-toggle-card-icon {
    transform: rotate(180deg);
}

.kg-toggle-content {
    padding: 0.85rem 1.25rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.9rem;
    line-height: 1.7;
}

.kg-toggle-content p:last-child { margin-bottom: 0; }

/* Button */
.kg-button-card {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}

.kg-btn-accent {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.kg-btn-accent:hover {
    background-color: var(--color-primary-dark);
    color: white;
}

/* Video */
.kg-video-card {
    margin: 2rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
    position: relative;
}

.kg-video-card video {
    width: 100%;
    display: block;
}

/* Audio */
.kg-audio-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    margin: 1.5rem 0;
}

.kg-audio-thumbnail {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}

.kg-audio-player-container {
    flex: 1;
    min-width: 0;
}

.kg-audio-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* File */
.kg-file-card {
    margin: 1.5rem 0;
}

.kg-file-card-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color var(--transition-fast);
}

.kg-file-card-container:hover {
    border-color: var(--color-primary);
    color: var(--color-text);
}

.kg-file-card-contents {
    min-width: 0;
}

.kg-file-card-title {
    font-size: 0.9rem;
    font-weight: 600;
}

.kg-file-card-caption {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.kg-file-card-metadata {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.2rem;
}

.kg-file-card-filesize,
.kg-file-card-filename {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Header card */
.kg-header-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(232, 135, 14, 0.12), rgba(194, 90, 60, 0.08));
    border: 1px solid rgba(232, 135, 14, 0.2);
    margin: 2rem 0;
    gap: 1rem;
}

.kg-header-card-header h2 {
    font-size: 2rem;
    font-weight: 800;
    margin: 0;
}

.kg-header-card-subheader p {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.kg-header-card-button .kg-btn-accent {
    margin-top: 0.5rem;
}

/* Product card */
.kg-product-card {
    display: flex;
    gap: 1.25rem;
    padding: 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    margin: 1.5rem 0;
}

.kg-product-card-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.kg-product-card-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.kg-product-card-description {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.kg-product-card-rating {
    display: flex;
    gap: 2px;
    margin-bottom: 0.5rem;
}

.kg-product-card-rating-active {
    color: var(--color-primary);
}

/* NFT card */
.kg-nft-card {
    margin: 2rem 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-surface);
}

/* Responsive bookmark */
@media (max-width: 600px) {
    .kg-bookmark-thumbnail {
        display: none;
    }

    .kg-product-card {
        flex-direction: column;
    }
}