/* AI Insider Newsletter Theme - Clean, Light, Minimal */

:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-text: #1a1a1a;
    --color-text-secondary: #6b7280;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-border: #e5e7eb;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Newsreader', Georgia, serif;
    --max-width: 680px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
}

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

html {
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}

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

a:hover {
    text-decoration: underline;
}

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

/* Site Wrapper */
.site-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-md);
    position: sticky;
    top: 0;
    background: var(--color-bg);
    z-index: 100;
}

.header-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo img {
    height: 32px;
    width: auto;
}

.site-logo .site-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.site-logo:hover {
    text-decoration: none;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.site-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.site-nav a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.site-nav a:hover {
    color: var(--color-text);
    text-decoration: none;
}

.subscribe-btn {
    background: var(--color-text);
    color: var(--color-bg) !important;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.9rem;
}

.subscribe-btn:hover {
    background: var(--color-text-secondary);
    text-decoration: none !important;
}

/* Main */
.site-main {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* Homepage Hero */
.hero {
    max-width: var(--max-width);
    margin: 0 auto var(--spacing-xl);
    text-align: center;
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--spacing-md);
}

.hero-subscribe {
    margin-top: var(--spacing-md);
}

.subscribe-text {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.subscribe-form {
    display: flex;
    gap: 0.5rem;
    max-width: 400px;
    margin: 0 auto;
}

.subscribe-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}

.subscribe-form input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.subscribe-form button {
    padding: 0.75rem 1.25rem;
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
}

.subscribe-form button:hover {
    background: var(--color-accent-hover);
}

/* Posts Section */
.posts-section {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Post Card */
.post-card {
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

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

.post-meta {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.reading-time {
    color: var(--color-text-secondary);
}

.post-title {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

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

.post-title a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.post-excerpt {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.post-tags {
    display: flex;
    gap: var(--spacing-xs);
}

.tag {
    font-size: 0.8rem;
    color: var(--color-accent);
    background: var(--color-bg-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.tag:hover {
    text-decoration: none;
    background: var(--color-border);
}

/* Pagination */
.pagination {
    max-width: var(--max-width);
    margin: var(--spacing-lg) auto 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
}

.pagination-link {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

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

/* Post Full */
.post-full {
    max-width: var(--max-width);
    margin: 0 auto;
}

.post-header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.post-full .post-meta {
    margin-bottom: var(--spacing-sm);
}

.post-full .post-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.post-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    font-family: var(--font-serif);
    font-style: italic;
}

/* Post Content */
.post-content {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.75;
}

.post-content h2 {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    letter-spacing: -0.01em;
}

.post-content h3 {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 600;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.post-content p {
    margin-bottom: var(--spacing-md);
}

.post-content ul, .post-content ol {
    margin: 0 0 var(--spacing-md) var(--spacing-md);
}

.post-content li {
    margin-bottom: var(--spacing-xs);
}

.post-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.post-content code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    background: var(--color-bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

.post-content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: var(--spacing-md);
    border-radius: 8px;
    overflow-x: auto;
    margin: var(--spacing-md) 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

.post-content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.post-content img {
    border-radius: 8px;
    margin: var(--spacing-md) 0;
}

/* Koenig Editor Classes */
.kg-width-wide {
    max-width: calc(var(--max-width) + 200px);
    margin-left: calc(50% - 50vw + var(--spacing-md));
    margin-right: calc(50% - 50vw + var(--spacing-md));
    width: calc(100vw - var(--spacing-md) * 2);
}

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

.kg-image-card {
    margin: var(--spacing-md) 0;
}

.kg-image-card img {
    width: 100%;
}

.kg-image-card figcaption {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-align: center;
    margin-top: var(--spacing-xs);
}

.kg-gallery-card {
    margin: var(--spacing-md) 0;
}

.kg-gallery-container {
    display: flex;
    flex-flow: row wrap;
    gap: var(--spacing-xs);
}

.kg-gallery-row {
    display: flex;
    flex-flow: row wrap;
    gap: var(--spacing-xs);
}

.kg-gallery-image img {
    width: 100%;
    height: auto;
}

.kg-bookmark-card {
    margin: var(--spacing-md) 0;
}

.kg-bookmark-container {
    display: flex;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
}

.kg-bookmark-content {
    flex: 1;
    padding: var(--spacing-sm);
}

.kg-bookmark-title {
    font-weight: 600;
    color: var(--color-text);
}

.kg-bookmark-description {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

.kg-bookmark-metadata {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    font-size: 0.85rem;
}

.kg-bookmark-icon {
    width: 16px;
    height: 16px;
}

.kg-bookmark-author {
    color: var(--color-text-secondary);
}

.kg-bookmark-thumbnail {
    width: 160px;
    flex-shrink: 0;
}

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

.post-content a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* Post Footer */
.post-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.post-share {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.post-share a {
    color: var(--color-text-secondary);
}

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

/* Post Subscribe */
.post-subscribe {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-radius: 12px;
    text-align: center;
}

.post-subscribe h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.post-subscribe p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Related Posts */
.related-posts {
    margin-top: var(--spacing-xl);
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
}

.related-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.related-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.related-card {
    display: flex;
    gap: var(--spacing-sm);
    align-items: baseline;
}

.related-card time {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    min-width: 60px;
}

.related-card h4 {
    font-size: 1rem;
    font-weight: 500;
}

.related-card a {
    color: var(--color-text);
}

.related-card a:hover {
    color: var(--color-accent);
}

/* Page */
.page-full {
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-header {
    margin-bottom: var(--spacing-lg);
}

.page-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.page-content {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.75;
}

.page-content p {
    margin-bottom: var(--spacing-md);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md);
    margin-top: auto;
}

.footer-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* Author Page */
.author-page {
    max-width: var(--max-width);
    margin: 0 auto;
}

.author-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.author-image {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
}

.author-name {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.author-bio {
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--spacing-sm);
}

.author-count {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Tag Page */
.tag-page {
    max-width: var(--max-width);
    margin: 0 auto;
}

.tag-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.tag-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.tag-description {
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--spacing-sm);
}

.tag-count {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Error Page */
.error-page {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-border);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.error-message {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.error-link {
    color: var(--color-accent);
    font-weight: 500;
}

/* Mobile */
@media (max-width: 640px) {
    html {
        font-size: 16px;
    }

    .site-header {
        padding: var(--spacing-sm);
    }

    .site-nav ul {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .subscribe-form {
        flex-direction: column;
    }

    .post-full .post-title {
        font-size: 1.75rem;
    }

    .post-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }
}