:root {
    --cosmic-blue: #1e3a8a;
    --deep-purple: #5b21b6;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-pink: #ec4899;
    --text-white: #ffffff;
    --text-gray: #e5e7eb;
    --text-muted: #9ca3af;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --border-color: #475569;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--cosmic-blue) 0%, var(--deep-purple) 100%);
    color: var(--text-white);
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 80px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.post-container {
    max-width: 800px;
}

/* Header */
.header {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
}

.site-title {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: inline-block;
}

.desktop-nav {
    display: none;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background: var(--bg-hover);
    color: var(--accent-purple);
}

/* Main Content */
.main-content {
    padding: var(--spacing-xl) 0;
}

/* Posts Grid */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.post-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid transparent;
    display: flex;
    flex-direction: column;
}

.post-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-purple);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.3);
}

.post-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    display: block;
}

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

.post-card:hover .post-image img {
    transform: scale(1.1);
}

.post-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.post-category {
    display: inline-block;
    color: var(--accent-cyan);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
}

.post-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

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

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

.post-excerpt {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.post-views {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

.pagination-link,
.pagination-number {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-card);
    color: var(--text-white);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.pagination-link:hover,
.pagination-number:hover {
    background: var(--bg-hover);
    border-color: var(--accent-purple);
}

.pagination-number.active {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
}

.pagination-numbers {
    display: flex;
    gap: var(--spacing-xs);
}

/* Single Post */
.post-single {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.series-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(139, 92, 246, 0.2);
    color: var(--accent-purple);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.series-badge a {
    color: var(--accent-cyan);
    text-decoration: none;
}

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

.post-title-single {
    font-size: 2.5rem;
    line-height: 1.2;
    margin: var(--spacing-md) 0;
}

.post-meta-single {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.95rem;
}

.separator {
    color: var(--border-color);
}

.post-featured-image {
    width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.post-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

.post-body {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-gray);
}

.post-body h2,
.post-body h3,
.post-body h4 {
    color: var(--text-white);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

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

.post-body a {
    color: var(--accent-cyan);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.post-body a:hover {
    border-bottom-color: var(--accent-cyan);
}

.post-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: var(--spacing-lg) 0;
}

.post-body code {
    background: var(--bg-dark);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.post-body pre {
    background: var(--bg-dark);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

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

/* Series Navigation */
.series-navigation {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--border-color);
}

.series-navigation h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
}

.series-list {
    list-style: none;
    counter-reset: series-counter;
}

.series-list li {
    counter-increment: series-counter;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    border-radius: 8px;
    background: var(--bg-dark);
}

.series-list li::before {
    content: counter(series-counter) ". ";
    color: var(--accent-purple);
    font-weight: 700;
}

.series-list li.current {
    background: rgba(139, 92, 246, 0.2);
    border-left: 3px solid var(--accent-purple);
}

.series-list a {
    color: var(--text-gray);
    text-decoration: none;
    transition: var(--transition);
}

.series-list a:hover {
    color: var(--accent-cyan);
}

/* Series Pages */
.series-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.series-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid transparent;
}

.series-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-purple);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.3);
}

.series-card a {
    text-decoration: none;
    color: inherit;
}

.series-card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

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

.series-card h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-white);
}

.series-card p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.series-count {
    display: inline-block;
    color: var(--accent-cyan);
    font-size: 0.9rem;
    font-weight: 600;
}

/* Footer */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    z-index: 100;
}

.desktop-footer {
    display: none;
    text-align: center;
    padding: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.mobile-nav {
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.75rem;
    padding: var(--spacing-xs);
    border-radius: 8px;
    transition: var(--transition);
    min-width: 60px;
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
    color: var(--accent-purple);
    background: var(--bg-hover);
}

.mobile-nav-item svg {
    width: 24px;
    height: 24px;
}

/* Desktop Styles */
@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }
    
    .desktop-nav {
        display: flex;
    }
    
    .posts-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
    
    .post-title-single {
        font-size: 3rem;
    }
    
    .mobile-nav {
        display: none;
    }
    
    .desktop-footer {
        display: block;
    }
    
    .footer {
        position: static;
    }
}

@media (min-width: 1024px) {
    .posts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* Loading States */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    animation: shimmer 2s infinite;
    background: linear-gradient(
        to right,
        var(--bg-card) 0%,
        var(--bg-hover) 50%,
        var(--bg-card) 100%
    );
    background-size: 1000px 100%;
}

/* Accessibility */
.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;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .series-navigation {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}




.categories-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.category-item {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: inherit;
    border: 1px solid transparent;
    transition: var(--transition);
}

.category-item:hover {
    border-color: var(--accent-purple);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.3);
}

.category-item h2 {
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.category-item p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}