/* CSS Variables */
:root {
    /* Dark theme colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* Typography */
    --font-family-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-ar: 'IBM Plex Sans Arabic', 'IBM Plex Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-en);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: var(--line-height-base);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* RTL support for Arabic */
[dir="rtl"] {
    font-family: var(--font-family-ar);
}

/* Override RTL for language toggle button */
[dir="rtl"] .lang-toggle,
[dir="rtl"] .lang-toggle .lang-text {
    direction: ltr !important;
    text-align: center !important;
    unicode-bidi: bidi-override;
    font-family: var(--font-family-en) !important;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

/* Main content */
.main-content {
    flex: 1;
    padding: var(--spacing-2xl) 0;
    width: 100%;
}

/* Navbar */
.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: 60px;
}

.nav-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    padding: var(--spacing-md);
    margin: 0 auto;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.nav-brand h1:hover {
    color: var(--accent-primary);
}

/* Language toggle button */
.lang-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    width: 60px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    min-height: 44px;
    min-width: 44px;
}

.lang-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Blog posts */
.blog-posts {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* Blog card */
.blog-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 6px var(--shadow-color);
    cursor: pointer;
    width: 100%;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-color);
    border-color: var(--accent-primary);
}

/* Blog card content */
.blog-card-content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.blog-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.3;
    text-align: center;
}

.blog-excerpt {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    text-align: center;
}

/* Blog meta */
.blog-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.blog-date,
.blog-category {
    font-size: 0.875rem;
    color: var(--text-muted);
    background-color: var(--bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    width: 100%;
}

/* Responsive Design */

/* Tablets */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-content {
        padding: var(--spacing-xl) 0;
    }
    
    .blog-card-content {
        padding: var(--spacing-lg);
    }
    
    .nav-brand h1 {
        font-size: 1.3rem;
    }
    
    .blog-title {
        font-size: 1.3rem;
    }
    
    .lang-toggle {
        top: 0.75rem;
        right: 0.75rem;
        width: 50px;
        height: 35px;
        min-width: 50px;
        min-height: 35px;
    }
    
    .lang-toggle .lang-text {
        font-size: 0.8rem;
    }
}

/* Large phones */
@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-content {
        padding: var(--spacing-lg) 0;
    }
    
    .blog-card-content {
        padding: var(--spacing-md);
    }
    
    .nav-brand h1 {
        font-size: 1.2rem;
    }
    
    .blog-title {
        font-size: 1.2rem;
    }
    
    .blog-excerpt {
        font-size: 0.9rem;
    }
    
    .lang-toggle {
        top: 0.5rem;
        right: 0.5rem;
        width: 45px;
        height: 32px;
        min-width: 45px;
        min-height: 32px;
    }
    
    .lang-toggle .lang-text {
        font-size: 0.75rem;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    .main-content {
        padding: var(--spacing-md) 0;
    }
    
    .blog-card-content {
        padding: var(--spacing-sm);
    }
    
    .nav-brand h1 {
        font-size: 1.1rem;
    }
    
    .blog-title {
        font-size: 1.1rem;
    }
    
    .blog-excerpt {
        font-size: 0.85rem;
    }
    
    .blog-date,
    .blog-category {
        font-size: 0.75rem;
    }
    
    .footer {
        padding: var(--spacing-lg) 0;
    }
    
    .footer-text {
        font-size: 0.8rem;
    }
}

/* Loading animation */
body:not(.loaded) {
    opacity: 0;
    transition: opacity 0.3s ease;
}

body.loaded {
    opacity: 1;
}

/* Focus styles for accessibility */
button:focus,
a:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}