/* ============================================================
   Custom Properties — Dark Mode (default)
   ============================================================ */

:root {
    --bg:           #141414;
    --bg-secondary: #1C1C1C;
    --bg-tertiary:  #242424;
    --text:         #E8E4DC;
    --text-muted:   #7A756E;
    --border:       #2A2A2A;
    --accent:       #F5A623;
    --accent-dim:   rgba(245, 166, 35, 0.1);
    --code-bg:      #111111;
    --code-text:    #E8E4DC;

    --font-heading: 'Fraunces', Georgia, serif;
    --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

    --content-width: 720px;
    --header-height: 60px;
    --transition:    180ms ease;
}

[data-theme="light"] {
    --bg:           #F9F8F6;
    --bg-secondary: #F0EDE8;
    --bg-tertiary:  #E8E3DC;
    --text:         #1A1A1A;
    --text-muted:   #6B6560;
    --border:       #DDD9D3;
    --accent:       #C47D0B;
    --accent-dim:   rgba(196, 125, 11, 0.08);
    --code-bg:      #1A1A1A;
    --code-text:    #E8E4DC;
}

/* ============================================================
   Reset
   ============================================================ */

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

/* ============================================================
   Base
   ============================================================ */

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition), color var(--transition);
}

main { flex: 1; }

a {
    color: var(--accent);
    text-decoration: none;
    transition: opacity var(--transition);
}

a:hover { opacity: 0.75; }

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

/* ============================================================
   Layout
   ============================================================ */

.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================================
   Header
   ============================================================ */

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.site-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    transition: color var(--transition);
    flex-shrink: 0;
}

.site-title:hover {
    color: var(--accent);
    opacity: 1;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.01em;
    transition: color var(--transition);
}

.nav-link:hover {
    color: var(--text);
    opacity: 1;
}

.header-members {
    display: flex;
    align-items: center;
}

.btn-subscribe {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.05em;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 5px 12px;
    border-radius: 4px;
    transition: background-color var(--transition), color var(--transition);
}

.btn-subscribe:hover {
    background-color: var(--accent);
    color: #111;
    opacity: 1;
}

/* ============================================================
   Theme Toggle
   ============================================================ */

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: color var(--transition), background-color var(--transition);
    line-height: 0;
}

.theme-toggle:hover {
    color: var(--text);
    background-color: var(--bg-secondary);
}

/* Dark mode: show sun (click → go light) */
[data-theme="dark"]  .icon-sun  { display: block; }
[data-theme="dark"]  .icon-moon { display: none; }

/* Light mode: show moon (click → go dark) */
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* ============================================================
   Home Page
   ============================================================ */

.home-page {
    padding: 64px 0 96px;
}

.site-hero {
    margin-bottom: 52px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.site-description {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 300;
    font-style: italic;
    color: var(--text-muted);
    line-height: 1.45;
}

/* ============================================================
   Post List / Post Card
   ============================================================ */

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

.post-card {
    padding: 36px 0;
    border-bottom: 1px solid var(--border);
}

.post-card:first-child {
    padding-top: 0;
}

.post-card-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    letter-spacing: 0.01em;
}

.meta-sep {
    opacity: 0.4;
}

.post-tag {
    color: var(--accent);
    font-weight: 500;
}

.post-tag:hover { opacity: 0.75; }

.post-card-title {
    font-family: var(--font-heading);
    font-size: 1.4375rem;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.025em;
    margin-bottom: 10px;
}

.post-card-title a {
    color: var(--text);
    transition: color var(--transition);
}

.post-card-title a:hover {
    color: var(--accent);
    opacity: 1;
}

.post-card-excerpt {
    font-size: 0.9375rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* ============================================================
   Pagination
   ============================================================ */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding-top: 52px;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
}

.pagination .newer-posts,
.pagination .older-posts {
    color: var(--text-muted);
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: color var(--transition), border-color var(--transition);
}

.pagination .newer-posts:hover,
.pagination .older-posts:hover {
    color: var(--text);
    border-color: var(--text-muted);
    opacity: 1;
}

.pagination .page-number {
    color: var(--text-muted);
}

/* ============================================================
   Post Page
   ============================================================ */

.post-page {
    padding: 56px 0 96px;
}

.post-header {
    margin-bottom: 40px;
}

.post-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 18px;
    letter-spacing: 0.01em;
}

.post-title {
    font-family: var(--font-heading);
    font-size: clamp(1.875rem, 5vw, 2.625rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.post-excerpt {
    font-size: 1.0625rem;
    color: var(--text-muted);
    line-height: 1.65;
    border-left: 2px solid var(--accent);
    padding-left: 16px;
    margin-top: 16px;
}

.post-feature-image {
    margin-bottom: 48px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

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

/* ============================================================
   Post Content — Prose Typography
   ============================================================ */

.post-content {
    font-size: 1.0625rem;
    line-height: 1.8;
}

.post-content > * + * {
    margin-top: 1.5em;
}

.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5 {
    font-family: var(--font-heading);
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.25;
    margin-top: 2.5em;
    margin-bottom: 0.6em;
}

.post-content h2 { font-size: 1.625rem; font-weight: 700; }
.post-content h3 { font-size: 1.3125rem; font-weight: 600; }
.post-content h4 { font-size: 1.125rem;  font-weight: 600; }
.post-content h5 { font-size: 1rem;      font-weight: 600; }

.post-content p { color: var(--text); }

.post-content a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: rgba(245, 166, 35, 0.35);
    text-underline-offset: 3px;
    transition: text-decoration-color var(--transition), opacity var(--transition);
}

.post-content a:hover {
    text-decoration-color: var(--accent);
    opacity: 0.85;
}

[data-theme="light"] .post-content a {
    text-decoration-color: rgba(196, 125, 11, 0.35);
}

[data-theme="light"] .post-content a:hover {
    text-decoration-color: var(--accent);
}

.post-content strong { font-weight: 600; }
.post-content em     { font-style: italic; }

.post-content ul,
.post-content ol {
    padding-left: 1.5em;
}

.post-content li { margin-bottom: 0.35em; }

.post-content blockquote {
    border-left: 2px solid var(--accent);
    padding: 2px 0 2px 20px;
    margin-left: 0;
    color: var(--text-muted);
    font-style: italic;
    font-size: 1.0625rem;
}

.post-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 3em 0;
}

/* ============================================================
   Code
   ============================================================ */

.post-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--bg-secondary);
    color: var(--accent);
    padding: 2px 7px;
    border-radius: 4px;
}

.post-content pre {
    background-color: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px 24px;
    overflow-x: auto;
    margin: 2em 0;
}

.post-content pre code {
    background: none;
    color: var(--code-text);
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.7;
}

/* Koenig wide/full width cards */
.kg-width-wide {
    margin-left: calc(50% - 50vw + 24px);
    margin-right: calc(50% - 50vw + 24px);
    max-width: min(1000px, calc(100vw - 48px));
}

.kg-width-full {
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    max-width: 100vw;
}

/* Ghost code card */
.kg-code-card {
    margin: 2em 0;
}

.kg-code-card pre {
    margin: 0;
    border-radius: 8px;
}

/* ============================================================
   Ghost Koenig Cards
   ============================================================ */

.post-content .kg-image-card {
    margin: 2em 0;
}

.post-content .kg-image-card img {
    width: 100%;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.post-content .kg-image-card figcaption {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 10px;
}

.post-content .kg-gallery-card {
    margin: 2em 0;
}

.post-content .kg-gallery-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.post-content .kg-gallery-image img {
    border-radius: 4px;
    object-fit: cover;
    width: 100%;
    height: 100%;
}

.post-content .kg-bookmark-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin: 2em 0;
    transition: border-color var(--transition);
}

.post-content .kg-bookmark-card:hover {
    border-color: var(--accent);
}

.post-content .kg-bookmark-container {
    display: flex;
    text-decoration: none;
    color: var(--text);
    gap: 0;
}

.post-content .kg-bookmark-container:hover { opacity: 1; }

.post-content .kg-bookmark-content {
    padding: 18px 20px;
    flex: 1;
    min-width: 0;
}

.post-content .kg-bookmark-title {
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: 6px;
    line-height: 1.3;
}

.post-content .kg-bookmark-description {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-content .kg-bookmark-metadata {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.post-content .kg-bookmark-icon {
    width: 16px;
    height: 16px;
    border-radius: 2px;
}

.post-content .kg-bookmark-thumbnail {
    width: 130px;
    flex-shrink: 0;
}

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

.post-content .kg-callout-card {
    display: flex;
    gap: 14px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 20px;
    margin: 2em 0;
}

.post-content .kg-callout-emoji {
    font-size: 1.25rem;
    flex-shrink: 0;
    line-height: 1.5;
}

.post-content .kg-callout-text {
    font-size: 0.9375rem;
    line-height: 1.65;
}

.post-content .kg-toggle-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 20px;
    margin: 2em 0;
}

.post-content .kg-toggle-heading-text {
    font-weight: 600;
    cursor: pointer;
}

.post-content .kg-video-card {
    margin: 2em 0;
}

.post-content .kg-video-card video {
    width: 100%;
    border-radius: 6px;
}

/* ============================================================
   Post Footer
   ============================================================ */

.post-footer {
    margin-top: 64px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 36px;
}

.tag-pill {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.02em;
    color: var(--text-muted);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: 4px;
    transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

.tag-pill:hover {
    color: var(--accent);
    border-color: var(--accent);
    background-color: var(--accent-dim);
    opacity: 1;
}

.post-author {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border);
}

.author-avatar-placeholder {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
    background-color: var(--accent-dim);
    border: 1px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
}

.author-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 4px;
}

.author-name {
    font-weight: 600;
    font-size: 0.9375rem;
    display: block;
    margin-bottom: 6px;
    color: var(--text);
    transition: color var(--transition);
}

.author-name:hover {
    color: var(--accent);
    opacity: 1;
}

.author-bio {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.55;
}

/* ============================================================
   Post Navigation
   ============================================================ */

.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 48px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.post-nav-link {
    display: flex;
    flex-direction: column;
    gap: 5px;
    color: var(--text);
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color var(--transition), background-color var(--transition);
}

.post-nav-link:hover {
    border-color: var(--accent);
    background-color: var(--accent-dim);
    opacity: 1;
}

.post-nav-next { text-align: right; }

.nav-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.nav-title {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.35;
    color: var(--text);
}

/* ============================================================
   Tag Page
   ============================================================ */

.tag-page {
    padding: 56px 0 96px;
}

.tag-header {
    margin-bottom: 52px;
    padding-bottom: 36px;
    border-bottom: 1px solid var(--border);
}

.tag-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 10px;
}

.tag-title::before {
    content: '#';
    color: var(--accent);
    margin-right: 1px;
}

.tag-description {
    font-size: 0.9375rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* ============================================================
   Error Page
   ============================================================ */

.error-page {
    padding: 96px 0;
    text-align: center;
}

.error-code {
    font-family: var(--font-mono);
    font-size: 5rem;
    font-weight: 400;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -0.04em;
}

.error-message {
    font-size: 1.0625rem;
    color: var(--text-muted);
    margin-bottom: 36px;
}

.btn-home {
    display: inline-block;
    padding: 10px 24px;
    background-color: var(--accent);
    color: #111;
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: 6px;
    transition: opacity var(--transition);
}

.btn-home:hover { opacity: 0.85; }

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
    border-top: 1px solid var(--border);
    padding: 28px 0;
    transition: border-color var(--transition);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}


.footer-copy {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.footer-copy a {
    color: var(--text-muted);
    transition: color var(--transition);
}

.footer-copy a:hover {
    color: var(--accent);
    opacity: 1;
}

.footer-nav {
    display: flex;
    gap: 20px;
}

.footer-link {
    font-size: 0.8125rem;
    color: var(--text-muted);
    transition: color var(--transition);
}

.footer-link:hover {
    color: var(--text);
    opacity: 1;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 640px) {
    .container {
        padding: 0 20px;
    }

    .site-nav {
        display: none;
    }

    .home-page { padding: 48px 0 72px; }
    .post-page { padding: 40px 0 72px; }
    .tag-page  { padding: 40px 0 72px; }

    .site-description { font-size: 1.125rem; }

    .post-card-title  { font-size: 1.25rem; }
    .post-title       { font-size: 1.75rem; }
    .tag-title        { font-size: 1.75rem; }

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

    .post-nav-next { text-align: left; }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }


    .post-content .kg-bookmark-thumbnail {
        display: none;
    }

    .error-code { font-size: 3.5rem; }
}