/* Critical CSS - Above-the-fold styles only */

/* CSS Custom Properties for Theme Colors */
:root {
    /* Light Theme (Default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f8;
    --bg-tertiary: #f1f1f1;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #eeeeee;
    --accent-color: #0073aa;
    --accent-hover: #005a87;
    --link-color: #0073aa;
    --link-hover: #005a87;
    --shadow-color: rgba(0, 0, 0, 0.1);

    /* Smooth transitions */
    --transition-speed: 0.3s;
    --transition-easing: ease;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-tertiary: #888888;
    --border-color: #444444;
    --accent-color: #4da6ff;
    --accent-hover: #3390ff;
    --link-color: #4da6ff;
    --link-hover: #3390ff;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Reset and base styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-speed) var(--transition-easing),
        color var(--transition-speed) var(--transition-easing);
}

/* Header styles */
.site-header {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.site-branding {
    margin-bottom: 1rem;
}

.site-title {
    margin: 0;
    font-size: 1.8rem;
}

.site-title a {
    text-decoration: none;
    color: var(--text-primary);
    transition: color var(--transition-speed) var(--transition-easing);
}

.site-title a:hover {
    color: var(--link-color);
}

.site-description {
    margin: 0.5rem 0 0;
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) var(--transition-easing);
    box-shadow: 0 2px 8px var(--shadow-color);
}

/* Reading Progress Bar */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--bg-secondary);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-speed) var(--transition-easing);
}

.reading-progress-bar.visible {
    opacity: 1;
}

.reading-progress-fill {
    height: 100%;
    background: var(--accent-color);
    width: 0%;
    transition: width 0.1s ease-out;
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--bg-tertiary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    fill: var(--text-primary);
    transition: fill var(--transition-speed) var(--transition-easing);
}

/* Navigation */
.main-navigation ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 1.5rem;
}

.main-navigation a {
    text-decoration: none;
    color: var(--text-primary);
    padding: 0.5rem 0;
    transition: color var(--transition-speed) var(--transition-easing);
}

.main-navigation a:hover {
    color: var(--link-color);
}

/* Main content */
.site-main {
    min-height: calc(100vh - 200px);
}

.content-area {
    padding: 2rem 0;
}

/* Article styles */
article {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-speed) var(--transition-easing),
        border-color var(--transition-speed) var(--transition-easing);
}

.entry-title {
    margin-top: 0;
    font-size: 1.5rem;
}

.entry-title a {
    text-decoration: none;
    color: var(--text-primary);
    transition: color var(--transition-speed) var(--transition-easing);
}

.entry-title a:hover {
    color: var(--link-color);
}

.entry-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.read-more {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 3px;
    transition: background var(--transition-speed) var(--transition-easing);
}

.read-more:hover {
    background: var(--accent-hover);
}

/* Footer */
.site-footer {
    padding: 2rem 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-primary);
    transition: background-color var(--transition-speed) var(--transition-easing),
        border-color var(--transition-speed) var(--transition-easing),
        color var(--transition-speed) var(--transition-easing);
}

/* Social Sharing Buttons */
.social-sharing {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 1.5rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-speed) var(--transition-easing);
}



.social-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-easing);
}

.social-share-btn:hover {
    transform: translateY(-2px);
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 8px var(--shadow-color);
}

.social-share-btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    transition: fill var(--transition-speed) var(--transition-easing);
}

.share-count {
    margin-left: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    transition: background-color var(--transition-speed) var(--transition-easing);
}

/* Content Rating System */
.content-rating {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 1.5rem 0;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) var(--transition-easing);
}

.rating-stars {
    display: flex;
    gap: 0.25rem;
}

.rating-star {
    width: 24px;
    height: 24px;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-easing);
}

.rating-star svg {
    width: 100%;
    height: 100%;
    fill: var(--text-tertiary);
    transition: fill var(--transition-speed) var(--transition-easing);
}

.rating-star.active svg,
.rating-star:hover svg {
    fill: gold;
}

.rating-value {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 60px;
    text-align: center;
}

.rating-count {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-left: 0.5rem;
}

/* Scroll to Top Button */


/* Related Posts Carousel */
.related-posts-section {
    margin: 2rem 0;
    padding: 1.5rem 0;
}

.related-posts-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    text-align: center;
    transition: color var(--transition-speed) var(--transition-easing);
}

.related-posts-carousel {
    position: relative;
    overflow: hidden;
    padding: 1rem 0;
}

.related-posts-wrapper {
    display: flex;
    transition: transform 0.4s ease;
    gap: 1rem;
}

.related-post-card {
    min-width: 250px;
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px var(--shadow-color);
    transition: all var(--transition-speed) var(--transition-easing);
    border: 1px solid var(--border-color);
}

.related-post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--shadow-color);
}

.related-post-image {
    width: 100%;
    height: 150px;
    object-fit: cover;
    display: block;
}

.related-post-content {
    padding: 1rem;
}

.related-post-title {
    margin: 0 0 0.5rem 0;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: color var(--transition-speed) var(--transition-easing);
}

.related-post-title a {
    color: inherit;
    text-decoration: none;
}

.related-post-title a:hover {
    color: var(--link-hover);
}

.related-post-excerpt {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.related-post-meta {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.carousel-nav {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-tertiary);
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-easing);
}

.carousel-dot.active {
    background: var(--accent-color);
    transform: scale(1.2);
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent-color);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: all var(--transition-speed) var(--transition-easing);
}

.carousel-arrow:hover {
    background: var(--accent-hover);
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 10px;
}

.carousel-next {
    right: 10px;
}

.carousel-arrow svg {
    width: 20px;
    height: 20px;
    fill: white;
}

/* Breadcrumb Navigation */
.breadcrumb {
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.breadcrumb ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-easing);
}

.breadcrumb a:hover {
    color: var(--link-hover);
}

.breadcrumb .separator {
    color: var(--text-tertiary);
    margin: 0 0.5rem;
}

.breadcrumb .current {
    color: var(--text-primary);
    font-weight: 500;
}



/* Utility classes */
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Image Lazy Loading */
img[data-src],
img[data-srcset] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img.loaded {
    opacity: 1;
}

/* Placeholder for images before they load */
img[data-src]:not(.loaded),
img[data-srcset]:not(.loaded) {
    background: linear-gradient(90deg, #f0f0f0 0%, #e0e0e0 50%, #f0f0f0 100%);
    background-size: 200% 200%;
    animation: placeholder-shimmer 1.5s infinite;
}

@keyframes placeholder-shimmer {
    0% {
        background-position: -100% 0;
    }

    100% {
        background-position: 100% 0;
    }
}

/* Mobile Menu Enhancement */
.menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) var(--transition-easing);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.menu-toggle:hover {
    transform: scale(1.1);
    background: var(--bg-tertiary);
}

.menu-toggle svg {
    width: 20px;
    height: 20px;
    fill: var(--text-primary);
    transition: fill var(--transition-speed) var(--transition-easing);
}

.main-navigation {
    transition: all var(--transition-speed) var(--transition-easing);
}

.mobile-menu-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-speed) var(--transition-easing);
}

.mobile-menu-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.main-navigation.mobile-menu-open {
    position: fixed;
    top: 0;
    left: 0;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--bg-primary);
    z-index: 1000;
    padding: 5rem 1rem 1rem;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform var(--transition-speed) var(--transition-easing);
}

.main-navigation.mobile-menu-open ul {
    flex-direction: column;
    gap: 1rem;
}

.main-navigation.mobile-menu-open a {
    display: block;
    padding: 0.75rem;
    border-radius: 4px;
    transition: background var(--transition-speed) var(--transition-easing);
}

.main-navigation.mobile-menu-open a:hover {
    background: var(--bg-secondary);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .main-navigation:not(.mobile-menu-open) {
        display: none;
    }

    .main-navigation.mobile-menu-open {
        transform: translateX(0);
    }
}