/*
 * Glassmorphism Theme for BSSG
 * Modern frosted glass effect with blur, transparency, and subtle borders
 * Features: backdrop-filter blur, soft shadows, and subtle gradients
 * IMPROVED: Better accessibility, performance, and text browser support
 */

/* Reduced motion support - CRITICAL for accessibility */
@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;
    }
    
    /* Disable performance-heavy effects for reduced motion */
    .container, nav a, .glass-button, .glass-card {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }
    
    /* Simplify hover effects */
    .featured-image:hover, .index-image:hover, .tag-image:hover, .archive-image:hover {
        transform: none !important;
    }
}

:root {
    /* Glassmorphism color scheme - IMPROVED contrast ratios */
    --glass-bg: rgba(255, 255, 255, 0.20); /* MAXIMUM CONTRAST: Much higher opacity for better readability */
    --glass-border: rgba(255, 255, 255, 0.25); /* Increased opacity */
    --glass-shadow: rgba(0, 0, 0, 0.15); /* Increased for better definition */
    --glass-highlight: rgba(255, 255, 255, 0.08);
    --bg-color-1: #0F3443;
    --bg-color-2: #348F50;
    --bg-color-3: #56B4D3;
    --text-color: rgba(0, 0, 0, 0.9); /* MAXIMUM contrast: Dark text on light backgrounds */
    --text-color-muted: rgba(0, 0, 0, 0.8); /* MAXIMUM contrast: Slightly muted but still dark */
    --accent-color: #00FFCC;
    --accent-color-hover: #99FFE6;
    --link-color: rgba(0, 255, 204, 0.95); /* Improved contrast */
    --link-hover: rgba(150, 255, 230, 1);
    --title-gradient-start: rgba(0, 255, 204, 1);
    --title-gradient-end: rgba(56, 180, 211, 1);

    /* Typography - Added fallbacks for text browsers */
    --font-main: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-headings: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, 'Courier New', monospace;

    /* Sizing - OPTIMIZED blur amount */
    --content-width: 1000px;
    --blur-amount: 12px; /* Reduced from 20px for better performance */
    --blur-amount-light: 6px; /* For less critical elements */
    --border-radius: 16px;
    --small-radius: 10px;
}

/* Base elements with optimized gradient background */
body {
    font-family: var(--font-main);
    background: linear-gradient(135deg, var(--bg-color-1) 0%, var(--bg-color-2) 50%, var(--bg-color-3) 100%);
    /* REMOVED: background-attachment: fixed for better mobile performance */
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
    font-size: 16px;
    font-weight: 400;
    min-height: 100vh;
}

/* OPTIMIZED: Container with reduced glass morphism effect */
.container {
    max-width: var(--content-width);
    margin: 40px auto;
    padding: 0;
    position: relative;
    background: var(--glass-bg);
    /* CONDITIONAL: Only apply backdrop-filter if motion is not reduced */
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 32px var(--glass-shadow);
    overflow: hidden;
}

/* FALLBACK: For browsers that don't support backdrop-filter */
@supports not (backdrop-filter: blur(1px)) {
    .container {
        background: rgba(255, 255, 255, 0.9); /* Light solid fallback background for better contrast */
    }
    
    nav a {
        background: rgba(255, 255, 255, 0.8);
    }
    
    .glass-button {
        background: rgba(255, 255, 255, 0.8);
    }
    
    .glass-card {
        background: rgba(255, 255, 255, 0.8);
    }
}

/* OPTIMIZED: Simplified gradient glass highlight effect */
.container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 80px; /* Reduced height for performance */
    background: linear-gradient(to bottom, var(--glass-highlight), transparent);
    pointer-events: none;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

/* Header with optimized glass effect */
header {
    background: rgba(255, 255, 255, 0.20); /* MAXIMUM CONTRAST: Much higher opacity for better readability */
    padding: 30px 40px;
    position: relative;
    border-bottom: 1px solid var(--glass-border);
}

header h1 {
    margin: 0;
    padding: 0;
    font-size: 2.4rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    opacity: 0.95;
}

/* Site title with improved glassmorphic gradient effect */
.site-title {
    margin: 0;
    padding: 0;
    font-size: 2.4rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
}

.site-title a {
    text-decoration: none;
    background: linear-gradient(120deg, var(--title-gradient-start), var(--title-gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    border-bottom: none;
    display: inline-block;
    position: relative;
    transition: all 0.3s ease;
    text-shadow: 0 1px 10px rgba(0, 255, 204, 0.4);
}

.site-title a:hover {
    transform: translateY(-2px);
    text-shadow: 0 4px 20px rgba(0, 255, 204, 0.6);
    border-bottom: none;
}

.site-title a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-bottom: none;
}

/* FALLBACK: For browsers that don't support background-clip */
@supports not (background-clip: text) {
    .site-title a {
        color: var(--accent-color) !important;
        background: none !important;
    }
}

/* OPTIMIZED: Navigation with reduced glass effects */
nav {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 16px 40px;
    justify-content: flex-end;
    position: relative;
    gap: 12px;
    background: rgba(255, 255, 255, 0.05); /* Increased opacity */
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    display: inline-block;
    border-radius: 30px;
    background: var(--glass-bg);
    /* CONDITIONAL: Only apply backdrop-filter if motion is not reduced */
    backdrop-filter: blur(var(--blur-amount-light)); /* Reduced blur for nav items */
    -webkit-backdrop-filter: blur(var(--blur-amount-light));
    border: 1px solid var(--glass-border);
    transition: all 0.2s ease;
    white-space: nowrap;
}

nav a:hover, nav a:focus {
    background: rgba(255, 255, 255, 0.18); /* Increased opacity for better contrast */
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    /* IMPROVED: Focus outline for accessibility */
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Active navigation with accent glow */
nav a.active {
    background: rgba(0, 204, 255, 0.2); /* Increased opacity */
    border-color: rgba(0, 204, 255, 0.4); /* Increased opacity */
    box-shadow: 0 0 15px rgba(0, 204, 255, 0.3);
}

/* RSS in accent color */
nav a:last-child {
    background: rgba(0, 204, 255, 0.25); /* Increased opacity */
    border-color: rgba(0, 204, 255, 0.4); /* Increased opacity */
}

nav a:last-child:hover {
    background: rgba(0, 204, 255, 0.35); /* Increased opacity */
}

/* Content area with glass effect */
main {
    padding: 40px;
    position: relative;
    background: rgba(255, 255, 255, 0.15); /* IMPROVED: Better background for content readability */
}

/* Typography with improved contrast */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 600;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-color); /* Improved contrast */
}

a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid rgba(0, 255, 204, 0.3);
    transition: all 0.2s ease;
}

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

a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    color: var(--link-hover);
    border-bottom-color: var(--link-hover);
}

article {
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.25); /* MAXIMUM CONTRAST: Much higher opacity for text readability */
    border: 1px solid var(--glass-border);
    border-radius: var(--small-radius);
    /* OPTIMIZED: Reduced shadow complexity */
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

article:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

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

article h1 {
    margin-top: 0;
    color: var(--text-color);
}

article .article-content {
    color: var(--text-color); /* Improved contrast */
}

article .meta {
    color: rgba(255, 255, 255, 1); /* WHITE text on dark background for maximum contrast */
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    /* MAXIMUM CONTRAST: Very strong background for perfect metadata visibility */
    background: rgba(0, 0, 0, 0.8);
    padding: 0.75rem 1rem;
    border-radius: var(--small-radius);
    border: 2px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}



.reading-time {
    color: rgba(255, 255, 255, 1); /* WHITE text on dark meta background for maximum contrast */
    font-weight: 500; /* IMPROVED: Make it slightly bolder */
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tags a {
    background: rgba(0, 0, 0, 0.8); /* Dark background for better contrast */
    color: rgba(0, 255, 204, 1); /* Bright cyan text on dark background */
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    border: 1px solid rgba(0, 255, 204, 0.5);
    border-bottom: 1px solid rgba(0, 255, 204, 0.5); /* Consistent border */
    transition: all 0.2s ease;
    font-weight: 500; /* Make text slightly bolder for better readability */
}

.tags a:hover {
    background: rgba(0, 0, 0, 0.9); /* Darker background on hover */
    color: rgba(0, 255, 204, 1); /* Keep bright cyan text */
    transform: translateY(-1px);
    border: 1px solid rgba(0, 255, 204, 0.8); /* Brighter border on hover */
    border-bottom: 1px solid rgba(0, 255, 204, 0.8); /* Consistent border */
    box-shadow: 0 2px 8px rgba(0, 255, 204, 0.3); /* Add cyan glow on hover */
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tag-count {
    background: rgba(0, 255, 204, 0.2); /* Increased opacity */
    color: var(--accent-color);
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

code {
    background: rgba(0, 0, 0, 0.4); /* Improved contrast */
    color: var(--accent-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    border: 1px solid rgba(0, 255, 204, 0.2);
}

pre {
    background: rgba(0, 0, 0, 0.5); /* Improved contrast */
    color: var(--text-color);
    padding: 1.5rem;
    border-radius: var(--small-radius);
    overflow-x: auto;
    border: 1px solid var(--glass-border);
    margin: 1.5rem 0;
}

pre code {
    background: none;
    border: none;
    padding: 0;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--small-radius);
    margin: 1rem 0;
}

img:hover {
    transform: scale(1.02);
    transition: transform 0.3s ease;
}

/* OPTIMIZED: Featured image with reduced glass effects */
.featured-image {
    position: relative;
    margin: 2rem 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    /* OPTIMIZED: Simplified shadow */
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.featured-image::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.1) 100%);
    pointer-events: none;
    z-index: 1;
}

.featured-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.3s ease;
    /* OPTIMIZED: Simplified filter effects */
    filter: brightness(1.05) contrast(1.05);
}

.featured-image:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.featured-image:hover img {
    transform: scale(1.02); /* Reduced scale for better performance */
}

.featured-image .image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7); /* Improved contrast */
    color: var(--text-color);
    padding: 1rem;
    font-size: 0.9rem;
    z-index: 2;
}

/* OPTIMIZED: Index image with reduced effects */
.index-image {
    position: relative;
    margin: 1.5rem 0;
    border-radius: var(--small-radius);
    overflow: hidden;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.index-image::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.05) 100%);
    pointer-events: none;
    z-index: 1;
}

.index-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.3s ease;
    filter: brightness(1.02) contrast(1.02);
}

.index-image:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.index-image:hover img {
    transform: scale(1.01);
}

.tag-image {
    position: relative;
    margin: 1.5rem 0;
    border-radius: var(--small-radius);
    overflow: hidden;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tag-image::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.05) 100%);
    pointer-events: none;
    z-index: 1;
}

.tag-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.3s ease;
    filter: brightness(1.02) contrast(1.02);
}

.tag-image:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.tag-image:hover img {
    transform: scale(1.01);
}

.archive-image {
    position: relative;
    margin: 1.5rem 0;
    border-radius: var(--small-radius);
    overflow: hidden;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.archive-image::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.05) 100%);
    pointer-events: none;
    z-index: 1;
}

.archive-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.3s ease;
    filter: brightness(1.02) contrast(1.02);
}

.archive-image:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.archive-image:hover img {
    transform: scale(1.01);
}

footer {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem 40px;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    color: var(--text-color-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--accent-color);
    border-bottom: 1px solid rgba(0, 255, 204, 0.3);
}

footer a:hover {
    color: var(--link-hover);
    border-bottom-color: var(--link-hover);
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
}

.pagination a {
    background: var(--glass-bg);
    color: var(--text-color);
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
    transition: all 0.2s ease;
    font-weight: 500;
    border-bottom: 1px solid var(--glass-border); /* Consistent border */
}

.pagination a:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--glass-border); /* Consistent border */
}

.pagination .page-info {
    color: var(--text-color-muted);
    font-weight: 500;
}

/* OPTIMIZED: Glass button component with reduced effects */
.glass-button {
    background: var(--glass-bg);
    /* CONDITIONAL: Only apply backdrop-filter if motion is not reduced */
    backdrop-filter: blur(var(--blur-amount-light));
    -webkit-backdrop-filter: blur(var(--blur-amount-light));
    border: 1px solid var(--glass-border);
    border-radius: var(--small-radius);
    padding: 0.75rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-block;
    font-weight: 500;
}

.glass-button:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* OPTIMIZED: Glass card component with reduced effects */
.glass-card {
    background: var(--glass-bg);
    /* CONDITIONAL: Only apply backdrop-filter if motion is not reduced */
    backdrop-filter: blur(var(--blur-amount-light));
    -webkit-backdrop-filter: blur(var(--blur-amount-light));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1rem 0;
    transition: all 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* IMPROVED: Better responsive design */
@media (max-width: 768px) {
    body {
        padding: 10px;
        /* OPTIMIZED: Simplified background on mobile */
        background: linear-gradient(135deg, var(--bg-color-1) 0%, var(--bg-color-2) 100%);
    }
    
    .container {
        margin: 20px auto;
        border-radius: var(--small-radius);
        /* OPTIMIZED: Remove backdrop-filter on mobile for better performance */
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(255, 255, 255, 0.9); /* Light solid background for mobile with maximum contrast */
    }
    
    header, main, footer {
        padding: 20px;
    }
    
    .site-title {
        font-size: 2rem;
    }
    
    nav {
        flex-direction: column;
        align-items: center;
        gap: 8px;
        padding: 16px 20px;
    }
    
    nav a {
        width: 100%;
        text-align: center;
        padding: 12px 16px;
        /* OPTIMIZED: Remove backdrop-filter on mobile */
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(255, 255, 255, 0.1);
    }
    
    article h1 {
        font-size: 1.8rem;
    }
    
    article .meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    article .article-content {
        font-size: 1rem;
    }
    
    footer {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }
    
    .container {
        margin: 10px auto;
        border-radius: 8px;
    }
    
    nav {
        padding: 12px 16px;
    }
    
    nav a {
        padding: 10px 12px;
        font-size: 0.85rem;
    }
    
    .pagination {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .pagination a {
        width: 100%;
        text-align: center;
        padding: 12px;
    }
}