/* 
 * Nordic Clean Theme for BSSG
 * Inspired by Scandinavian design principles:
 * Minimalism, airiness, natural colors, and clean typography
 * 
 * IMPROVEMENTS APPLIED:
 * - Added comprehensive reduced motion support
 * - Enhanced accessibility with focus outlines
 * - Added text browser fallbacks
 * - Optimized performance while maintaining design
 */

:root {
    /* Nordic clean color scheme */
    --white: #FFFFFF;
    --off-white: #F9F7F7;
    --light-gray: #E5E9EC;
    --medium-gray: #CCD0D8;
    --dark-gray: #4A5568;
    --charcoal: #2D3748;
    --black: #1A202C;
    --pale-blue: #E2E8F0;
    --light-blue: #BEE3F8;
    --light-wood: #E8D0B0;
    --dark-wood: #B39169;
    --slate-blue: #718096;
    
    /* Semantic color assignments */
    --bg-color: var(--off-white);
    --text-color: var(--charcoal);
    --accent-color: var(--dark-wood);
    --secondary-accent: var(--slate-blue);
    --link-color: var(--dark-wood);
    --link-hover: var(--charcoal);
    --link-visited: var(--slate-blue);
    --header-bg: var(--white);
    --header-text: var(--charcoal);
    --nav-bg: var(--white);
    --nav-text: var(--dark-gray);
    --nav-hover-text: var(--charcoal);
    --nav-active-text: var(--dark-wood);
    --footer-bg: var(--light-gray);
    --footer-text: var(--dark-gray);
    --border-color: var(--light-gray);
    
    /* Typography - ENHANCED fallbacks for text browsers */
    --font-main: 'Helvetica Neue', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    --font-headings: 'Helvetica Neue', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    --font-mono: 'Courier New', 'Courier', monospace;
    
    /* Sizing */
    --content-width: 820px;
    --content-padding: 2rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    --border-radius: 4px;
    
    /* Transitions - OPTIMIZED for performance */
    --transition-fast: 0.15s;
    --transition-base: 0.2s;
    --transition-slow: 0.3s;
}

/* REDUCED MOTION SUPPORT - Disable animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
        transform: none !important;
    }
    
    nav a::after {
        transition: none !important;
    }
    
    .featured-image img, 
    .index-image img, 
    .tag-image img, 
    .archive-image img {
        transition: none !important;
    }
    
    .featured-image:hover img, 
    .index-image:hover img, 
    .tag-image:hover img, 
    .archive-image:hover img {
        transform: none !important;
    }
    
    .tags-list a:hover,
    .pagination a:hover {
        transform: none !important;
    }
}

/* Base elements */
html {
    font-size: 16px;
    box-sizing: border-box;
}

*, 
*:before, 
*:after {
    box-sizing: inherit;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--spacing-xxl) var(--content-padding);
    background-color: var(--white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Clean, minimal header */
header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

/* Site title */
.site-title {
    font-family: var(--font-headings);
    font-weight: 500;
    font-size: 1.8rem;
    margin: 0;
    padding: 0;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

.site-title a {
    color: var(--header-text);
    text-decoration: none;
    transition: color var(--transition-base) ease;
    /* ACCESSIBILITY: Focus outline */
    outline: none;
}

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

/* ACCESSIBILITY: Focus states for site title */
.site-title a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Site description */
header p {
    margin: var(--spacing-sm) 0 0;
    font-size: 1rem;
    color: var(--secondary-accent);
    max-width: 600px;
    line-height: 1.5;
}

/* Navigation - clean horizontal layout */
nav {
    margin: var(--spacing-lg) 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    align-items: center;
}

nav a {
    color: var(--nav-text);
    text-decoration: none;
    font-size: 0.95rem;
    position: relative;
    padding-bottom: 2px;
    transition: color var(--transition-base) ease;
    /* ACCESSIBILITY: Focus outline */
    outline: none;
}

nav a::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform var(--transition-slow) ease;
}

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

nav a:hover::after,
nav a.active::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

nav a.active {
    color: var(--nav-active-text);
    font-weight: 500;
}

/* ACCESSIBILITY: Focus states for navigation */
nav a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Content area */
main {
    min-height: 60vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    color: var(--text-color);
    margin: var(--spacing-xl) 0 var(--spacing-md);
    line-height: 1.3;
    font-weight: 500;
}

h1 {
    font-size: 2.5rem;
    margin-top: 0;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

h2 {
    font-size: 2rem;
    color: var(--charcoal);
    letter-spacing: -0.3px;
    margin-top: var(--spacing-xl);
}

h3 {
    font-size: 1.5rem;
    color: var(--dark-gray);
    margin-top: var(--spacing-lg);
}

p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-color);
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition-base) ease, border-bottom var(--transition-base) ease;
    border-bottom: 1px solid transparent;
    /* ACCESSIBILITY: Focus outline */
    outline: none;
}

a:visited {
    color: var(--link-visited);
}

a:hover {
    color: var(--link-hover);
    border-bottom: 1px solid var(--link-hover);
}

/* ACCESSIBILITY: Focus states for general links */
a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Articles with ample whitespace */
article {
    margin-bottom: var(--spacing-xl);
    position: relative;
}

article:last-child {
    margin-bottom: 0;
}

article h1 {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-md);
}

article .meta {
    font-size: 0.9rem;
    margin: var(--spacing-md) 0 var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    color: var(--secondary-accent);
    align-items: center;
}

/* Reading time - TEXT BROWSER FALLBACK */
.reading-time {
    position: relative;
    display: inline-flex;
    align-items: center;
}

/* TEXT BROWSER FALLBACK: Add "Time: " prefix for reading time */
.reading-time::before {
    content: "Time: ";
}

/* Hide the prefix when CSS transforms are supported (modern browsers) */
@supports (transform: translateX(0)) {
    .reading-time::before {
        content: "⏱ ";
    }
}

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tags a {
    background-color: var(--pale-blue);
    color: var(--dark-gray);
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
    border-radius: var(--border-radius);
    border: none;
    transition: background-color var(--transition-base) ease, color var(--transition-base) ease;
    /* ACCESSIBILITY: Focus outline */
    outline: none;
}

.tags a:hover {
    background-color: var(--light-blue);
    color: var(--charcoal);
    border: none;
}

/* ACCESSIBILITY: Focus states for tags */
.tags a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Tags list page */
.tags-list {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin: 0;
}

.tags-list li {
    margin: 0;
}

.tags-list a {
    display: block;
    background-color: var(--pale-blue);
    color: var(--dark-gray);
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    border: none;
    transition: all var(--transition-base) ease;
    /* ACCESSIBILITY: Focus outline */
    outline: none;
}

.tags-list a:hover {
    background-color: var(--light-blue);
    color: var(--charcoal);
    border: none;
    transform: translateY(-2px);
}

/* ACCESSIBILITY: Focus states for tags list */
.tags-list a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Footer */
footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--footer-text);
    font-size: 0.9rem;
}

footer p {
    margin: var(--spacing-sm) 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

footer a {
    color: var(--secondary-accent);
    text-decoration: none;
    border: none;
    transition: color var(--transition-base) ease, border-bottom var(--transition-base) ease;
    /* ACCESSIBILITY: Focus outline */
    outline: none;
}

footer a:hover {
    color: var(--accent-color);
    border-bottom: 1px solid var(--accent-color);
}

/* ACCESSIBILITY: Focus states for footer links */
footer a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

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

.pagination a {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background-color: var(--pale-blue);
    color: var(--dark-gray);
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: var(--border-radius);
    border: none;
    transition: all var(--transition-base) ease;
    /* ACCESSIBILITY: Focus outline */
    outline: none;
}

.pagination a:hover {
    background-color: var(--light-blue);
    color: var(--charcoal);
    border: none;
    transform: translateY(-2px);
}

/* ACCESSIBILITY: Focus states for pagination */
.pagination a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.pagination .page-info {
    color: var(--secondary-accent);
    font-size: 0.9rem;
    margin: 0 var(--spacing-sm);
}

/* Featured images */
.featured-image, 
.index-image, 
.tag-image, 
.archive-image {
    margin: var(--spacing-lg) 0 var(--spacing-xl);
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    text-align: center;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.featured-image img, 
.index-image img, 
.tag-image img, 
.archive-image img {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 0 auto;
    transition: transform var(--transition-slow) ease;
}

.featured-image:hover img, 
.index-image:hover img, 
.tag-image:hover img, 
.archive-image:hover img {
    transform: scale(1.02);
}

.image-caption {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--pale-blue);
    color: var(--dark-gray);
    font-size: 0.85rem;
    font-style: italic;
    text-align: center;
}

/* Post list on index/tag/archive pages */
.posts-list article {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.posts-list article:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.posts-list h3 {
    margin-top: 0;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
}

.posts-list .summary {
    margin-bottom: var(--spacing-md);
}

/* ACCESSIBILITY: Focus states for post list links */
.posts-list a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Blockquote styling */
blockquote {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 3px solid var(--accent-color);
    background-color: var(--pale-blue);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

blockquote p:last-child {
    margin-bottom: 0;
}

/* Code blocks */
pre, code {
    font-family: var(--font-mono);
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
}

code {
    padding: 0.2em 0.4em;
    font-size: 0.9em;
}

pre {
    padding: var(--spacing-md);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

pre code {
    padding: 0;
    background-color: transparent;
}

/* Lists */
ul, ol {
    margin: 0 0 var(--spacing-lg) var(--spacing-lg);
    padding: 0;
}

ul li, ol li {
    margin-bottom: var(--spacing-sm);
}

/* Responsive styles */
@media (max-width: 768px) {
    :root {
        --content-padding: 1rem;
        --spacing-xl: 2rem;
        --spacing-lg: 1.5rem;
    }
    
    .container {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
        width: 95%;
    }
    
    header {
        margin-bottom: var(--spacing-lg);
    }
    
    nav {
        gap: var(--spacing-md);
        margin-top: var(--spacing-md);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.7rem;
    }
    
    h3 {
        font-size: 1.4rem;
    }
    
    article .meta {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    .posts-list article {
        margin-bottom: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
    
    .featured-image, 
    .index-image, 
    .tag-image, 
    .archive-image {
        margin: var(--spacing-md) 0 var(--spacing-lg);
    }
}