/* ============================================
   Minimal Modern Theme
   A clean, Linear/Notion-inspired Ghost theme
   ============================================ */

/* CSS Variables */
:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #fafafa;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;
    --color-border: #eaeaea;
    --color-accent: #00b227;
    --color-accent-hover: #009920;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

    --container-width: 1200px;
    --container-narrow: 720px;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

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

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

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-narrow {
    max-width: var(--container-narrow);
}

.site-main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.site-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    transition: opacity var(--transition);
}

.site-logo:hover {
    opacity: 0.7;
}

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

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

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    color: var(--color-text-secondary);
}

.search-btn:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-xxl);
    max-width: 640px;
    margin: 0 auto;
}

.hero-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--spacing-lg);
    border: 3px solid var(--color-border);
    transition: transform var(--transition), border-color var(--transition);
}

.hero-avatar:hover {
    transform: scale(1.05);
    border-color: var(--color-accent);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* Section Titles */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

/* Projects Section */
.projects-section {
    margin-bottom: var(--spacing-xxl);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.project-card {
    position: relative;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
}

.project-card:hover {
    border-color: var(--color-text-tertiary);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.project-card-no-link {
    cursor: default;
}

.project-card-no-link:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--color-border);
}

.project-link {
    display: block;
}

.project-image {
    aspect-ratio: 3/2;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-card-no-link:hover .project-image img {
    transform: none;
}

.project-info {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.project-name {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.project-description {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.project-link-indicator {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    opacity: 0;
    transform: translate(4px, -4px);
    transition: all var(--transition);
}

.project-card:hover .project-link-indicator {
    opacity: 1;
    transform: translate(0, 0);
}

.project-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.3em 0.6em;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-tertiary);
    width: fit-content;
}

/* Posts Section */
.posts-section {
    margin-bottom: var(--spacing-sm);
}

/* Post Feed */
.post-feed {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-lg);
}

.post-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
}

.post-card:hover {
    border-color: var(--color-text-tertiary);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

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

.post-card-image {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.post-card:hover .post-card-image img {
    transform: scale(1.02);
}

.post-card-content {
    padding: var(--spacing-md);
}

.post-card-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.post-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: var(--spacing-xs);
}

.post-card-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.post-card-meta {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.meta-separator {
    margin: 0 0.4em;
}

/* Single Post */
.post-header {
    text-align: center;
    padding: var(--spacing-lg) 0 var(--spacing-xl);
}

.post-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    transition: opacity var(--transition);
}

.post-tag:hover {
    opacity: 0.7;
}

.post-title {
    font-size: 2.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
}

.post-excerpt {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
}

.post-meta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.post-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-weight: 500;
    transition: color var(--transition);
}

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

.post-date {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
}

.post-feature-image {
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.post-feature-image figcaption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-sm);
}

/* Post Content - Ghost Content Styles */
.gh-content {
    font-size: 1.125rem;
    line-height: 1.75;
}

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

.gh-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-top: 2.5em;
}

.gh-content h3 {
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-top: 2em;
}

.gh-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 1.75em;
}

.gh-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: opacity var(--transition);
}

.gh-content a:hover {
    opacity: 0.7;
}

.gh-content strong {
    font-weight: 600;
}

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

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

.gh-content li + li {
    margin-top: 0.5em;
}

.gh-content pre {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
}

.gh-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-bg-secondary);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

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

.gh-content img {
    border-radius: var(--radius-md);
}

.gh-content figure {
    margin: var(--spacing-lg) 0;
}

.gh-content figcaption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-sm);
}

.gh-content hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: var(--spacing-xl) 0;
}

/* Post Footer */
.post-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

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

.tag-link {
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.4em 0.8em;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.tag-link:hover {
    background: var(--color-text);
    color: var(--color-bg);
}

/* Page Styles */
.page-header {
    padding: var(--spacing-lg) 0 var(--spacing-xl);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

/* Author & Tag Pages */
.author-header,
.tag-header {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.author-avatar-large {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
}

.author-name,
.tag-name {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xs);
}

.author-bio,
.tag-description {
    color: var(--color-text-secondary);
    max-width: 480px;
    margin: 0 auto var(--spacing-sm);
}

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

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

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.6em 1em;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.pagination-btn:hover {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
}

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

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-md);
}

.footer-nav a {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.footer-nav a:hover {
    color: var(--color-text);
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }

    .site-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-lg);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }

    body.nav-open .site-nav {
        opacity: 1;
        visibility: visible;
    }

    .site-nav a {
        font-size: 1.25rem;
    }

    .menu-toggle {
        display: flex;
    }

    body.nav-open .menu-toggle span:first-child {
        transform: translateY(3.5px) rotate(45deg);
    }

    body.nav-open .menu-toggle span:last-child {
        transform: translateY(-3.5px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

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

    .projects-grid {
        grid-template-columns: 1fr;
    }

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

    .post-excerpt {
        font-size: 1.1rem;
    }

    .gh-content {
        font-size: 1rem;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.875rem;
    }

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

    .post-card-content {
        padding: var(--spacing-sm);
    }

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