/* Dudaji Tech Blog Theme */
/* Brand Colors: Navy Blue #1B365D, Sky Blue #6B8DC4, Coral #F4A5A5 */

:root {
    --color-primary: #1B365D;
    --color-secondary: #6B8DC4;
    --color-accent: #F4A5A5;
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    --font-sans: var(--gh-font-body, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif);
    --font-heading: var(--gh-font-heading, var(--font-sans));
    --font-mono: 'Fira Code', 'JetBrains Mono', monospace;

    --max-width: 1200px;
    --content-width: 720px;
    --header-height: 72px;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-800);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

.site-main {
    flex: 1;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    height: var(--header-height);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo img {
    height: 40px;
    width: auto;
}

.site-nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
}

.site-nav a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-gray-600);
    transition: color var(--transition);
}

.site-nav a:hover {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle-bar {
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: 16px 24px;
}

.mobile-nav.active {
    display: block;
}

.mobile-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mobile-nav a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #2a4a7a 100%);
    padding: 80px 24px;
    text-align: center;
}

.hero-content {
    max-width: var(--content-width);
    margin: 0 auto;
}

.hero-logo {
    width: 280px;
    height: auto;
    margin: 0 auto 24px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 12px;
}

.hero-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
}

/* Content Section */
.content-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 48px 24px;
}

/* Tag Filter */
.tag-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-gray-200);
}

.tag-btn {
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-600);
    background: var(--color-gray-100);
    border-radius: 20px;
    transition: all var(--transition);
}

.tag-btn:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-800);
}

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

/* Search */
.search-container {
    margin-bottom: 32px;
}

.search-box {
    position: relative;
    max-width: 480px;
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 14px 48px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-gray-800);
    background: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-secondary);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(107, 141, 196, 0.15);
}

.search-input::placeholder {
    color: var(--color-gray-400);
}

.search-clear {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    padding: 4px;
    color: var(--color-gray-400);
    transition: color var(--transition);
}

.search-clear:hover {
    color: var(--color-gray-600);
}

/* Post Feed */
.post-feed {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    transition: opacity 0.2s ease;
}

/* Post Card */
.post-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition);
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-gray-300);
}

.post-card.hidden {
    display: none;
}

.post-card-link {
    display: block;
}

.post-card-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-gray-100);
}

.post-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    transition: transform var(--transition);
}

.post-card:hover .post-card-image img {
    transform: scale(1.05);
}

.post-card-image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-300);
}

.post-card-content {
    padding: 20px;
}

.post-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.post-card-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-secondary);
    background: rgba(107, 141, 196, 0.1);
    padding: 4px 10px;
    border-radius: 12px;
}

.post-card-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.4;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-excerpt {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.8125rem;
    color: var(--color-gray-400);
}

/* No Results */
.no-results {
    text-align: center;
    padding: 64px 24px;
    color: var(--color-gray-400);
}

.no-results svg {
    margin-bottom: 16px;
}

.no-results p {
    font-size: 1rem;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 48px 24px;
}

.pagination-prev,
.pagination-next {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-primary);
    padding: 12px 20px;
    background: var(--color-gray-50);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.pagination-prev:hover,
.pagination-next:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

/* Post Full */
.post-full {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 48px 24px;
}

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

.post-author-meta {
    margin-top: 24px;
}

.post-author-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.post-meta-separator {
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

.post-date,
.post-reading-time {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.post-tags-header {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.post-tag {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-secondary);
    padding: 6px 14px;
    border-radius: 16px;
    transition: background var(--transition);
}

.post-tag:hover {
    background: var(--color-primary);
}

.post-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-gray-900);
    line-height: 1.3;
    margin-bottom: 16px;
}

.post-excerpt {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    line-height: 1.6;
}

.author-card {
    display: flex;
    align-items: center;
    gap: 10px;
}

.author-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.author-avatar-placeholder {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-secondary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.author-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-gray-700);
}

/* Feature Image */
.post-feature-image {
    margin-bottom: 40px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

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

.post-feature-image figcaption {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-align: center;
    padding: 12px;
    background: var(--color-gray-50);
}

/* Post Content */
.post-content {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-gray-700);
}

.post-content h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin: 48px 0 16px;
}

.post-content h3 {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin: 36px 0 12px;
}

.post-content h4 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin: 28px 0 8px;
}

.post-content p {
    margin-bottom: 24px;
}

.post-content a {
    color: var(--color-secondary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

.post-content ul,
.post-content ol {
    margin: 0 0 24px 24px;
}

.post-content li {
    margin-bottom: 8px;
}

.post-content blockquote {
    border-left: 4px solid var(--color-secondary);
    padding-left: 24px;
    margin: 32px 0;
    font-style: italic;
    color: var(--color-gray-600);
}

.post-content pre {
    background: var(--color-gray-900);
    color: var(--color-gray-100);
    padding: 24px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 32px 0;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
}

.post-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-gray-100);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.post-content pre code {
    background: none;
    padding: 0;
}

.post-content img {
    border-radius: var(--radius);
    margin: 32px auto;
}

.post-content hr {
    border: none;
    border-top: 1px solid var(--color-gray-200);
    margin: 48px 0;
}

.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 32px 0;
}

.post-content th,
.post-content td {
    padding: 12px 16px;
    border: 1px solid var(--color-gray-200);
    text-align: left;
}

.post-content th {
    background: var(--color-gray-50);
    font-weight: 600;
}

/* Post Footer */
.post-footer {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-gray-200);
}

.post-share {
    display: flex;
    align-items: center;
    gap: 16px;
}

.post-share span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-500);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--color-gray-100);
    color: var(--color-gray-600);
    transition: all var(--transition);
}

.share-btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.share-btn.twitter:hover {
    background: #1da1f2;
}

.share-btn.linkedin:hover {
    background: #0077b5;
}

/* Related Posts */
.related-posts {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 48px 24px 80px;
}

.related-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 32px;
    text-align: center;
}

/* Tag Header */
.tag-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #2a4a7a 100%);
    padding: 64px 24px;
    text-align: center;
}

.tag-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 8px;
}

.tag-description {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto 16px;
}

.tag-count {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

/* Author Header */
.author-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #2a4a7a 100%);
    padding: 64px 24px;
}

.author-profile {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 32px;
}

.author-profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.2);
}

.author-profile-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--color-secondary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 700;
}

.author-info .author-name {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 8px;
}

.author-bio {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 12px;
}

.author-location {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
}

.author-post-count {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Page */
.page-full {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 48px 24px 80px;
}

.page-header {
    margin-bottom: 40px;
    text-align: center;
}

.page-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-gray-900);
}

.page-feature-image {
    margin-bottom: 40px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.page-content {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-gray-700);
}

/* Error Page */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--header-height) - 200px);
    padding: 48px 24px;
}

.error-content {
    text-align: center;
}

.error-code {
    font-family: var(--font-heading);
    font-size: 8rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 16px;
}

.error-message {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    margin-bottom: 32px;
}

.error-link {
    display: inline-flex;
    align-items: center;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-primary);
    border-radius: var(--radius);
    transition: background var(--transition);
}

.error-link:hover {
    background: #152947;
}

/* Footer */
.site-footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: 64px 24px 32px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo img {
    height: 36px;
    margin-bottom: 16px;
}

.footer-description {
    font-size: 0.9375rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 64px;
}

.footer-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    display: block;
    font-size: 0.9375rem;
    color: var(--color-gray-400);
    padding: 6px 0;
    transition: color var(--transition);
}

.footer-section a:hover {
    color: var(--color-white);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 32px;
    border-top: 1px solid var(--color-gray-800);
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.footer-bottom a {
    color: var(--color-secondary);
}

.footer-bottom a:hover {
    color: var(--color-white);
}

/* Responsive */
@media (max-width: 1024px) {
    .post-feed {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .site-nav {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 60px 24px;
    }

    .hero-logo {
        width: 220px;
    }

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

    .post-feed {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

    .footer-container {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        flex-direction: column;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .author-profile {
        flex-direction: column;
        text-align: center;
    }

    .author-location {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .content-section {
        padding: 32px 16px;
    }

    .tag-filter {
        gap: 6px;
    }

    .tag-btn {
        padding: 6px 12px;
        font-size: 0.8125rem;
    }

    .search-input {
        padding: 12px 44px;
        font-size: 0.9375rem;
    }

    .post-card-content {
        padding: 16px;
    }

    .pagination {
        gap: 12px;
        flex-wrap: wrap;
    }

    .pagination-prev,
    .pagination-next {
        padding: 10px 16px;
        font-size: 0.875rem;
    }
}

/* Ghost-specific */
.kg-card {
    margin: 32px 0;
}

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

.kg-bookmark-card {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
    overflow: hidden;
}

.kg-bookmark-container {
    display: flex;
    text-decoration: none;
    color: inherit;
}

.kg-bookmark-content {
    flex: 1;
    padding: 20px;
}

.kg-bookmark-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 8px;
}

.kg-bookmark-description {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kg-bookmark-metadata {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

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

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

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

.kg-gallery-card {
    display: grid;
    gap: 8px;
}

.kg-gallery-row {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    gap: 8px;
}

.kg-embed-card {
    display: flex;
    justify-content: center;
}

.kg-embed-card iframe {
    max-width: 100%;
}

/* Koenig Width Classes */
.kg-width-wide {
    position: relative;
    width: 85vw;
    min-width: 100%;
    max-width: var(--max-width);
    margin-left: calc(50% - 42.5vw);
    margin-right: calc(50% - 42.5vw);
}

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

@media (max-width: 1200px) {
    .kg-width-wide {
        width: calc(100vw - 48px);
        margin-left: calc(50% - 50vw + 24px);
        margin-right: calc(50% - 50vw + 24px);
    }
}